/*
 * Copyright (c) 2016, Alliance for Open Media. All rights reserved
 *
 * This source code is subject to the terms of the BSD 2 Clause License and
 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
 * was not distributed with this source code in the LICENSE file, you can
 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
 * Media Patent License 1.0 was not distributed with this source code in the
 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
 */

#include <assert.h>

#include "av1/common/common_data.h"
#include "av1/common/scan.h"

DECLARE_ALIGNED(16, static const int16_t, default_scan_4x4[16]) = {
  0, 4, 1, 5, 8, 2, 12, 9, 3, 6, 13, 10, 7, 14, 11, 15,
};

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t, mcol_scan_4x4[16]) = {
  0, 4, 8, 12, 1, 5, 9, 13, 2, 6, 10, 14, 3, 7, 11, 15,
};

DECLARE_ALIGNED(16, static const int16_t, mrow_scan_4x4[16]) = {
  0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
};
#endif  // CONFIG_EXT_TX

DECLARE_ALIGNED(16, static const int16_t, col_scan_4x4[16]) = {
  0, 4, 8, 1, 12, 5, 9, 2, 13, 6, 10, 3, 7, 14, 11, 15,
};

DECLARE_ALIGNED(16, static const int16_t, row_scan_4x4[16]) = {
  0, 1, 4, 2, 5, 3, 6, 8, 9, 7, 12, 10, 13, 11, 14, 15,
};

DECLARE_ALIGNED(16, static const int16_t, default_scan_4x8[32]) = {
  0,  1,  4,  5,  2,  8,  6,  9,  10, 3,  12, 7,  13, 11, 14, 16,
  17, 15, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
};

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t, mcol_scan_4x8[32]) = {
  0, 4, 8,  12, 16, 20, 24, 28, 1, 5, 9,  13, 17, 21, 25, 29,
  2, 6, 10, 14, 18, 22, 26, 30, 3, 7, 11, 15, 19, 23, 27, 31,
};

DECLARE_ALIGNED(16, static const int16_t, mrow_scan_4x8[32]) = {
  0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15,
  16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
};
#endif

DECLARE_ALIGNED(16, static const int16_t, default_scan_8x4[32]) = {
  0,  1,  8,  9, 2,  16, 10, 17, 18, 3,  24, 11, 25, 19, 26, 4,
  12, 27, 20, 5, 28, 13, 21, 29, 6,  14, 22, 30, 7,  15, 23, 31,
};

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t, mcol_scan_8x4[32]) = {
  0, 8,  16, 24, 1, 9,  17, 25, 2, 10, 18, 26, 3, 11, 19, 27,
  4, 12, 20, 28, 5, 13, 21, 29, 6, 14, 22, 30, 7, 15, 23, 31,
};

DECLARE_ALIGNED(16, static const int16_t, mrow_scan_8x4[32]) = {
  0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15,
  16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
};
#endif

DECLARE_ALIGNED(16, static const int16_t, default_scan_8x8[64]) = {
  0,  8,  1,  16, 9,  2,  17, 24, 10, 3,  18, 25, 32, 11, 4,  26,
  33, 19, 40, 12, 34, 27, 5,  41, 20, 48, 13, 35, 42, 28, 21, 6,
  49, 56, 36, 43, 29, 7,  14, 50, 57, 44, 22, 37, 15, 51, 58, 30,
  45, 23, 52, 59, 38, 31, 60, 53, 46, 39, 61, 54, 47, 62, 55, 63,
};

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t, mcol_scan_8x8[64]) = {
  0, 8,  16, 24, 32, 40, 48, 56, 1, 9,  17, 25, 33, 41, 49, 57,
  2, 10, 18, 26, 34, 42, 50, 58, 3, 11, 19, 27, 35, 43, 51, 59,
  4, 12, 20, 28, 36, 44, 52, 60, 5, 13, 21, 29, 37, 45, 53, 61,
  6, 14, 22, 30, 38, 46, 54, 62, 7, 15, 23, 31, 39, 47, 55, 63,
};

DECLARE_ALIGNED(16, static const int16_t, mrow_scan_8x8[64]) = {
  0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15,
  16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
  32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
  48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
};
#endif  // CONFIG_EXT_TX

DECLARE_ALIGNED(16, static const int16_t, col_scan_8x8[64]) = {
  0,  8,  16, 1,  24, 9,  32, 17, 2,  40, 25, 10, 33, 18, 48, 3,
  26, 41, 11, 56, 19, 34, 4,  49, 27, 42, 12, 35, 20, 57, 50, 28,
  5,  43, 13, 36, 58, 51, 21, 44, 6,  29, 59, 37, 14, 52, 22, 7,
  45, 60, 30, 15, 38, 53, 23, 46, 31, 61, 39, 54, 47, 62, 55, 63,
};

DECLARE_ALIGNED(16, static const int16_t, row_scan_8x8[64]) = {
  0,  1,  2,  8,  9,  3,  16, 10, 4,  17, 11, 24, 5,  18, 25, 12,
  19, 26, 32, 6,  13, 20, 33, 27, 7,  34, 40, 21, 28, 41, 14, 35,
  48, 42, 29, 36, 49, 22, 43, 15, 56, 37, 50, 44, 30, 57, 23, 51,
  58, 45, 38, 52, 31, 59, 53, 46, 60, 39, 61, 47, 54, 55, 62, 63,
};

DECLARE_ALIGNED(16, static const int16_t, default_scan_8x16[128]) = {
  0,   1,   8,   2,   9,   16,  3,   10,  17,  24,  4,   11,  18,  25,  32,
  5,   12,  19,  26,  33,  40,  6,   13,  20,  27,  34,  41,  48,  7,   14,
  21,  28,  35,  42,  49,  56,  15,  22,  29,  36,  43,  50,  57,  64,  23,
  30,  37,  44,  51,  58,  65,  72,  31,  38,  45,  52,  59,  66,  73,  80,
  39,  46,  53,  60,  67,  74,  81,  88,  47,  54,  61,  68,  75,  82,  89,
  96,  55,  62,  69,  76,  83,  90,  97,  104, 63,  70,  77,  84,  91,  98,
  105, 112, 71,  78,  85,  92,  99,  106, 113, 120, 79,  86,  93,  100, 107,
  114, 121, 87,  94,  101, 108, 115, 122, 95,  102, 109, 116, 123, 103, 110,
  117, 124, 111, 118, 125, 119, 126, 127,
};

DECLARE_ALIGNED(16, static const int16_t, default_scan_16x8[128]) = {
  0,   1,  16,  2,   17,  32,  3,  18, 33,  48,  4,   19,  34,  49,  64,  5,
  20,  35, 50,  65,  80,  6,   21, 36, 51,  66,  81,  96,  7,   22,  37,  52,
  67,  82, 97,  112, 8,   23,  38, 53, 68,  83,  98,  113, 9,   24,  39,  54,
  69,  84, 99,  114, 10,  25,  40, 55, 70,  85,  100, 115, 11,  26,  41,  56,
  71,  86, 101, 116, 12,  27,  42, 57, 72,  87,  102, 117, 13,  28,  43,  58,
  73,  88, 103, 118, 14,  29,  44, 59, 74,  89,  104, 119, 15,  30,  45,  60,
  75,  90, 105, 120, 31,  46,  61, 76, 91,  106, 121, 47,  62,  77,  92,  107,
  122, 63, 78,  93,  108, 123, 79, 94, 109, 124, 95,  110, 125, 111, 126, 127,
};

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t, mcol_scan_8x16[128]) = {
  0, 8,  16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 96,  104, 112, 120,
  1, 9,  17, 25, 33, 41, 49, 57, 65, 73, 81, 89, 97,  105, 113, 121,
  2, 10, 18, 26, 34, 42, 50, 58, 66, 74, 82, 90, 98,  106, 114, 122,
  3, 11, 19, 27, 35, 43, 51, 59, 67, 75, 83, 91, 99,  107, 115, 123,
  4, 12, 20, 28, 36, 44, 52, 60, 68, 76, 84, 92, 100, 108, 116, 124,
  5, 13, 21, 29, 37, 45, 53, 61, 69, 77, 85, 93, 101, 109, 117, 125,
  6, 14, 22, 30, 38, 46, 54, 62, 70, 78, 86, 94, 102, 110, 118, 126,
  7, 15, 23, 31, 39, 47, 55, 63, 71, 79, 87, 95, 103, 111, 119, 127,
};

DECLARE_ALIGNED(16, static const int16_t, mcol_scan_16x8[128]) = {
  0,  16, 32, 48, 64, 80, 96,  112, 1,  17, 33, 49, 65, 81, 97,  113,
  2,  18, 34, 50, 66, 82, 98,  114, 3,  19, 35, 51, 67, 83, 99,  115,
  4,  20, 36, 52, 68, 84, 100, 116, 5,  21, 37, 53, 69, 85, 101, 117,
  6,  22, 38, 54, 70, 86, 102, 118, 7,  23, 39, 55, 71, 87, 103, 119,
  8,  24, 40, 56, 72, 88, 104, 120, 9,  25, 41, 57, 73, 89, 105, 121,
  10, 26, 42, 58, 74, 90, 106, 122, 11, 27, 43, 59, 75, 91, 107, 123,
  12, 28, 44, 60, 76, 92, 108, 124, 13, 29, 45, 61, 77, 93, 109, 125,
  14, 30, 46, 62, 78, 94, 110, 126, 15, 31, 47, 63, 79, 95, 111, 127,
};

DECLARE_ALIGNED(16, static const int16_t, mrow_scan_8x16[128]) = {
  0,   1,   2,   3,   4,   5,   6,   7,   8,   9,   10,  11,  12,  13,  14,
  15,  16,  17,  18,  19,  20,  21,  22,  23,  24,  25,  26,  27,  28,  29,
  30,  31,  32,  33,  34,  35,  36,  37,  38,  39,  40,  41,  42,  43,  44,
  45,  46,  47,  48,  49,  50,  51,  52,  53,  54,  55,  56,  57,  58,  59,
  60,  61,  62,  63,  64,  65,  66,  67,  68,  69,  70,  71,  72,  73,  74,
  75,  76,  77,  78,  79,  80,  81,  82,  83,  84,  85,  86,  87,  88,  89,
  90,  91,  92,  93,  94,  95,  96,  97,  98,  99,  100, 101, 102, 103, 104,
  105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119,
  120, 121, 122, 123, 124, 125, 126, 127,
};

DECLARE_ALIGNED(16, static const int16_t, mrow_scan_16x8[128]) = {
  0,   1,   2,   3,   4,   5,   6,   7,   8,   9,   10,  11,  12,  13,  14,
  15,  16,  17,  18,  19,  20,  21,  22,  23,  24,  25,  26,  27,  28,  29,
  30,  31,  32,  33,  34,  35,  36,  37,  38,  39,  40,  41,  42,  43,  44,
  45,  46,  47,  48,  49,  50,  51,  52,  53,  54,  55,  56,  57,  58,  59,
  60,  61,  62,  63,  64,  65,  66,  67,  68,  69,  70,  71,  72,  73,  74,
  75,  76,  77,  78,  79,  80,  81,  82,  83,  84,  85,  86,  87,  88,  89,
  90,  91,  92,  93,  94,  95,  96,  97,  98,  99,  100, 101, 102, 103, 104,
  105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119,
  120, 121, 122, 123, 124, 125, 126, 127,
};
#endif

DECLARE_ALIGNED(16, static const int16_t, default_scan_16x32[512]) = {
  0,   1,   16,  2,   17,  32,  3,   18,  33,  48,  4,   19,  34,  49,  64,
  5,   20,  35,  50,  65,  80,  6,   21,  36,  51,  66,  81,  96,  7,   22,
  37,  52,  67,  82,  97,  112, 8,   23,  38,  53,  68,  83,  98,  113, 128,
  9,   24,  39,  54,  69,  84,  99,  114, 129, 144, 10,  25,  40,  55,  70,
  85,  100, 115, 130, 145, 160, 11,  26,  41,  56,  71,  86,  101, 116, 131,
  146, 161, 176, 12,  27,  42,  57,  72,  87,  102, 117, 132, 147, 162, 177,
  192, 13,  28,  43,  58,  73,  88,  103, 118, 133, 148, 163, 178, 193, 208,
  14,  29,  44,  59,  74,  89,  104, 119, 134, 149, 164, 179, 194, 209, 224,
  15,  30,  45,  60,  75,  90,  105, 120, 135, 150, 165, 180, 195, 210, 225,
  240, 31,  46,  61,  76,  91,  106, 121, 136, 151, 166, 181, 196, 211, 226,
  241, 256, 47,  62,  77,  92,  107, 122, 137, 152, 167, 182, 197, 212, 227,
  242, 257, 272, 63,  78,  93,  108, 123, 138, 153, 168, 183, 198, 213, 228,
  243, 258, 273, 288, 79,  94,  109, 124, 139, 154, 169, 184, 199, 214, 229,
  244, 259, 274, 289, 304, 95,  110, 125, 140, 155, 170, 185, 200, 215, 230,
  245, 260, 275, 290, 305, 320, 111, 126, 141, 156, 171, 186, 201, 216, 231,
  246, 261, 276, 291, 306, 321, 336, 127, 142, 157, 172, 187, 202, 217, 232,
  247, 262, 277, 292, 307, 322, 337, 352, 143, 158, 173, 188, 203, 218, 233,
  248, 263, 278, 293, 308, 323, 338, 353, 368, 159, 174, 189, 204, 219, 234,
  249, 264, 279, 294, 309, 324, 339, 354, 369, 384, 175, 190, 205, 220, 235,
  250, 265, 280, 295, 310, 325, 340, 355, 370, 385, 400, 191, 206, 221, 236,
  251, 266, 281, 296, 311, 326, 341, 356, 371, 386, 401, 416, 207, 222, 237,
  252, 267, 282, 297, 312, 327, 342, 357, 372, 387, 402, 417, 432, 223, 238,
  253, 268, 283, 298, 313, 328, 343, 358, 373, 388, 403, 418, 433, 448, 239,
  254, 269, 284, 299, 314, 329, 344, 359, 374, 389, 404, 419, 434, 449, 464,
  255, 270, 285, 300, 315, 330, 345, 360, 375, 390, 405, 420, 435, 450, 465,
  480, 271, 286, 301, 316, 331, 346, 361, 376, 391, 406, 421, 436, 451, 466,
  481, 496, 287, 302, 317, 332, 347, 362, 377, 392, 407, 422, 437, 452, 467,
  482, 497, 303, 318, 333, 348, 363, 378, 393, 408, 423, 438, 453, 468, 483,
  498, 319, 334, 349, 364, 379, 394, 409, 424, 439, 454, 469, 484, 499, 335,
  350, 365, 380, 395, 410, 425, 440, 455, 470, 485, 500, 351, 366, 381, 396,
  411, 426, 441, 456, 471, 486, 501, 367, 382, 397, 412, 427, 442, 457, 472,
  487, 502, 383, 398, 413, 428, 443, 458, 473, 488, 503, 399, 414, 429, 444,
  459, 474, 489, 504, 415, 430, 445, 460, 475, 490, 505, 431, 446, 461, 476,
  491, 506, 447, 462, 477, 492, 507, 463, 478, 493, 508, 479, 494, 509, 495,
  510, 511,
};

DECLARE_ALIGNED(16, static const int16_t, default_scan_32x16[512]) = {
  0,   1,   32,  2,   33,  64,  3,   34,  65,  96,  4,   35,  66,  97,  128,
  5,   36,  67,  98,  129, 160, 6,   37,  68,  99,  130, 161, 192, 7,   38,
  69,  100, 131, 162, 193, 224, 8,   39,  70,  101, 132, 163, 194, 225, 256,
  9,   40,  71,  102, 133, 164, 195, 226, 257, 288, 10,  41,  72,  103, 134,
  165, 196, 227, 258, 289, 320, 11,  42,  73,  104, 135, 166, 197, 228, 259,
  290, 321, 352, 12,  43,  74,  105, 136, 167, 198, 229, 260, 291, 322, 353,
  384, 13,  44,  75,  106, 137, 168, 199, 230, 261, 292, 323, 354, 385, 416,
  14,  45,  76,  107, 138, 169, 200, 231, 262, 293, 324, 355, 386, 417, 448,
  15,  46,  77,  108, 139, 170, 201, 232, 263, 294, 325, 356, 387, 418, 449,
  480, 16,  47,  78,  109, 140, 171, 202, 233, 264, 295, 326, 357, 388, 419,
  450, 481, 17,  48,  79,  110, 141, 172, 203, 234, 265, 296, 327, 358, 389,
  420, 451, 482, 18,  49,  80,  111, 142, 173, 204, 235, 266, 297, 328, 359,
  390, 421, 452, 483, 19,  50,  81,  112, 143, 174, 205, 236, 267, 298, 329,
  360, 391, 422, 453, 484, 20,  51,  82,  113, 144, 175, 206, 237, 268, 299,
  330, 361, 392, 423, 454, 485, 21,  52,  83,  114, 145, 176, 207, 238, 269,
  300, 331, 362, 393, 424, 455, 486, 22,  53,  84,  115, 146, 177, 208, 239,
  270, 301, 332, 363, 394, 425, 456, 487, 23,  54,  85,  116, 147, 178, 209,
  240, 271, 302, 333, 364, 395, 426, 457, 488, 24,  55,  86,  117, 148, 179,
  210, 241, 272, 303, 334, 365, 396, 427, 458, 489, 25,  56,  87,  118, 149,
  180, 211, 242, 273, 304, 335, 366, 397, 428, 459, 490, 26,  57,  88,  119,
  150, 181, 212, 243, 274, 305, 336, 367, 398, 429, 460, 491, 27,  58,  89,
  120, 151, 182, 213, 244, 275, 306, 337, 368, 399, 430, 461, 492, 28,  59,
  90,  121, 152, 183, 214, 245, 276, 307, 338, 369, 400, 431, 462, 493, 29,
  60,  91,  122, 153, 184, 215, 246, 277, 308, 339, 370, 401, 432, 463, 494,
  30,  61,  92,  123, 154, 185, 216, 247, 278, 309, 340, 371, 402, 433, 464,
  495, 31,  62,  93,  124, 155, 186, 217, 248, 279, 310, 341, 372, 403, 434,
  465, 496, 63,  94,  125, 156, 187, 218, 249, 280, 311, 342, 373, 404, 435,
  466, 497, 95,  126, 157, 188, 219, 250, 281, 312, 343, 374, 405, 436, 467,
  498, 127, 158, 189, 220, 251, 282, 313, 344, 375, 406, 437, 468, 499, 159,
  190, 221, 252, 283, 314, 345, 376, 407, 438, 469, 500, 191, 222, 253, 284,
  315, 346, 377, 408, 439, 470, 501, 223, 254, 285, 316, 347, 378, 409, 440,
  471, 502, 255, 286, 317, 348, 379, 410, 441, 472, 503, 287, 318, 349, 380,
  411, 442, 473, 504, 319, 350, 381, 412, 443, 474, 505, 351, 382, 413, 444,
  475, 506, 383, 414, 445, 476, 507, 415, 446, 477, 508, 447, 478, 509, 479,
  510, 511,
};

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t, mcol_scan_16x32[512]) = {
  0,   16,  32,  48,  64,  80,  96,  112, 128, 144, 160, 176, 192, 208, 224,
  240, 256, 272, 288, 304, 320, 336, 352, 368, 384, 400, 416, 432, 448, 464,
  480, 496, 1,   17,  33,  49,  65,  81,  97,  113, 129, 145, 161, 177, 193,
  209, 225, 241, 257, 273, 289, 305, 321, 337, 353, 369, 385, 401, 417, 433,
  449, 465, 481, 497, 2,   18,  34,  50,  66,  82,  98,  114, 130, 146, 162,
  178, 194, 210, 226, 242, 258, 274, 290, 306, 322, 338, 354, 370, 386, 402,
  418, 434, 450, 466, 482, 498, 3,   19,  35,  51,  67,  83,  99,  115, 131,
  147, 163, 179, 195, 211, 227, 243, 259, 275, 291, 307, 323, 339, 355, 371,
  387, 403, 419, 435, 451, 467, 483, 499, 4,   20,  36,  52,  68,  84,  100,
  116, 132, 148, 164, 180, 196, 212, 228, 244, 260, 276, 292, 308, 324, 340,
  356, 372, 388, 404, 420, 436, 452, 468, 484, 500, 5,   21,  37,  53,  69,
  85,  101, 117, 133, 149, 165, 181, 197, 213, 229, 245, 261, 277, 293, 309,
  325, 341, 357, 373, 389, 405, 421, 437, 453, 469, 485, 501, 6,   22,  38,
  54,  70,  86,  102, 118, 134, 150, 166, 182, 198, 214, 230, 246, 262, 278,
  294, 310, 326, 342, 358, 374, 390, 406, 422, 438, 454, 470, 486, 502, 7,
  23,  39,  55,  71,  87,  103, 119, 135, 151, 167, 183, 199, 215, 231, 247,
  263, 279, 295, 311, 327, 343, 359, 375, 391, 407, 423, 439, 455, 471, 487,
  503, 8,   24,  40,  56,  72,  88,  104, 120, 136, 152, 168, 184, 200, 216,
  232, 248, 264, 280, 296, 312, 328, 344, 360, 376, 392, 408, 424, 440, 456,
  472, 488, 504, 9,   25,  41,  57,  73,  89,  105, 121, 137, 153, 169, 185,
  201, 217, 233, 249, 265, 281, 297, 313, 329, 345, 361, 377, 393, 409, 425,
  441, 457, 473, 489, 505, 10,  26,  42,  58,  74,  90,  106, 122, 138, 154,
  170, 186, 202, 218, 234, 250, 266, 282, 298, 314, 330, 346, 362, 378, 394,
  410, 426, 442, 458, 474, 490, 506, 11,  27,  43,  59,  75,  91,  107, 123,
  139, 155, 171, 187, 203, 219, 235, 251, 267, 283, 299, 315, 331, 347, 363,
  379, 395, 411, 427, 443, 459, 475, 491, 507, 12,  28,  44,  60,  76,  92,
  108, 124, 140, 156, 172, 188, 204, 220, 236, 252, 268, 284, 300, 316, 332,
  348, 364, 380, 396, 412, 428, 444, 460, 476, 492, 508, 13,  29,  45,  61,
  77,  93,  109, 125, 141, 157, 173, 189, 205, 221, 237, 253, 269, 285, 301,
  317, 333, 349, 365, 381, 397, 413, 429, 445, 461, 477, 493, 509, 14,  30,
  46,  62,  78,  94,  110, 126, 142, 158, 174, 190, 206, 222, 238, 254, 270,
  286, 302, 318, 334, 350, 366, 382, 398, 414, 430, 446, 462, 478, 494, 510,
  15,  31,  47,  63,  79,  95,  111, 127, 143, 159, 175, 191, 207, 223, 239,
  255, 271, 287, 303, 319, 335, 351, 367, 383, 399, 415, 431, 447, 463, 479,
  495, 511,
};

DECLARE_ALIGNED(16, static const int16_t, mcol_scan_32x16[512]) = {
  0,  32, 64, 96,  128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448, 480,
  1,  33, 65, 97,  129, 161, 193, 225, 257, 289, 321, 353, 385, 417, 449, 481,
  2,  34, 66, 98,  130, 162, 194, 226, 258, 290, 322, 354, 386, 418, 450, 482,
  3,  35, 67, 99,  131, 163, 195, 227, 259, 291, 323, 355, 387, 419, 451, 483,
  4,  36, 68, 100, 132, 164, 196, 228, 260, 292, 324, 356, 388, 420, 452, 484,
  5,  37, 69, 101, 133, 165, 197, 229, 261, 293, 325, 357, 389, 421, 453, 485,
  6,  38, 70, 102, 134, 166, 198, 230, 262, 294, 326, 358, 390, 422, 454, 486,
  7,  39, 71, 103, 135, 167, 199, 231, 263, 295, 327, 359, 391, 423, 455, 487,
  8,  40, 72, 104, 136, 168, 200, 232, 264, 296, 328, 360, 392, 424, 456, 488,
  9,  41, 73, 105, 137, 169, 201, 233, 265, 297, 329, 361, 393, 425, 457, 489,
  10, 42, 74, 106, 138, 170, 202, 234, 266, 298, 330, 362, 394, 426, 458, 490,
  11, 43, 75, 107, 139, 171, 203, 235, 267, 299, 331, 363, 395, 427, 459, 491,
  12, 44, 76, 108, 140, 172, 204, 236, 268, 300, 332, 364, 396, 428, 460, 492,
  13, 45, 77, 109, 141, 173, 205, 237, 269, 301, 333, 365, 397, 429, 461, 493,
  14, 46, 78, 110, 142, 174, 206, 238, 270, 302, 334, 366, 398, 430, 462, 494,
  15, 47, 79, 111, 143, 175, 207, 239, 271, 303, 335, 367, 399, 431, 463, 495,
  16, 48, 80, 112, 144, 176, 208, 240, 272, 304, 336, 368, 400, 432, 464, 496,
  17, 49, 81, 113, 145, 177, 209, 241, 273, 305, 337, 369, 401, 433, 465, 497,
  18, 50, 82, 114, 146, 178, 210, 242, 274, 306, 338, 370, 402, 434, 466, 498,
  19, 51, 83, 115, 147, 179, 211, 243, 275, 307, 339, 371, 403, 435, 467, 499,
  20, 52, 84, 116, 148, 180, 212, 244, 276, 308, 340, 372, 404, 436, 468, 500,
  21, 53, 85, 117, 149, 181, 213, 245, 277, 309, 341, 373, 405, 437, 469, 501,
  22, 54, 86, 118, 150, 182, 214, 246, 278, 310, 342, 374, 406, 438, 470, 502,
  23, 55, 87, 119, 151, 183, 215, 247, 279, 311, 343, 375, 407, 439, 471, 503,
  24, 56, 88, 120, 152, 184, 216, 248, 280, 312, 344, 376, 408, 440, 472, 504,
  25, 57, 89, 121, 153, 185, 217, 249, 281, 313, 345, 377, 409, 441, 473, 505,
  26, 58, 90, 122, 154, 186, 218, 250, 282, 314, 346, 378, 410, 442, 474, 506,
  27, 59, 91, 123, 155, 187, 219, 251, 283, 315, 347, 379, 411, 443, 475, 507,
  28, 60, 92, 124, 156, 188, 220, 252, 284, 316, 348, 380, 412, 444, 476, 508,
  29, 61, 93, 125, 157, 189, 221, 253, 285, 317, 349, 381, 413, 445, 477, 509,
  30, 62, 94, 126, 158, 190, 222, 254, 286, 318, 350, 382, 414, 446, 478, 510,
  31, 63, 95, 127, 159, 191, 223, 255, 287, 319, 351, 383, 415, 447, 479, 511,
};

DECLARE_ALIGNED(16, static const int16_t, mrow_scan_16x32[512]) = {
  0,   1,   2,   3,   4,   5,   6,   7,   8,   9,   10,  11,  12,  13,  14,
  15,  16,  17,  18,  19,  20,  21,  22,  23,  24,  25,  26,  27,  28,  29,
  30,  31,  32,  33,  34,  35,  36,  37,  38,  39,  40,  41,  42,  43,  44,
  45,  46,  47,  48,  49,  50,  51,  52,  53,  54,  55,  56,  57,  58,  59,
  60,  61,  62,  63,  64,  65,  66,  67,  68,  69,  70,  71,  72,  73,  74,
  75,  76,  77,  78,  79,  80,  81,  82,  83,  84,  85,  86,  87,  88,  89,
  90,  91,  92,  93,  94,  95,  96,  97,  98,  99,  100, 101, 102, 103, 104,
  105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119,
  120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134,
  135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149,
  150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164,
  165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179,
  180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194,
  195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209,
  210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224,
  225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239,
  240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254,
  255, 256, 257, 258, 259, 260, 261, 262, 263, 264, 265, 266, 267, 268, 269,
  270, 271, 272, 273, 274, 275, 276, 277, 278, 279, 280, 281, 282, 283, 284,
  285, 286, 287, 288, 289, 290, 291, 292, 293, 294, 295, 296, 297, 298, 299,
  300, 301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312, 313, 314,
  315, 316, 317, 318, 319, 320, 321, 322, 323, 324, 325, 326, 327, 328, 329,
  330, 331, 332, 333, 334, 335, 336, 337, 338, 339, 340, 341, 342, 343, 344,
  345, 346, 347, 348, 349, 350, 351, 352, 353, 354, 355, 356, 357, 358, 359,
  360, 361, 362, 363, 364, 365, 366, 367, 368, 369, 370, 371, 372, 373, 374,
  375, 376, 377, 378, 379, 380, 381, 382, 383, 384, 385, 386, 387, 388, 389,
  390, 391, 392, 393, 394, 395, 396, 397, 398, 399, 400, 401, 402, 403, 404,
  405, 406, 407, 408, 409, 410, 411, 412, 413, 414, 415, 416, 417, 418, 419,
  420, 421, 422, 423, 424, 425, 426, 427, 428, 429, 430, 431, 432, 433, 434,
  435, 436, 437, 438, 439, 440, 441, 442, 443, 444, 445, 446, 447, 448, 449,
  450, 451, 452, 453, 454, 455, 456, 457, 458, 459, 460, 461, 462, 463, 464,
  465, 466, 467, 468, 469, 470, 471, 472, 473, 474, 475, 476, 477, 478, 479,
  480, 481, 482, 483, 484, 485, 486, 487, 488, 489, 490, 491, 492, 493, 494,
  495, 496, 497, 498, 499, 500, 501, 502, 503, 504, 505, 506, 507, 508, 509,
  510, 511,
};

DECLARE_ALIGNED(16, static const int16_t, mrow_scan_32x16[512]) = {
  0,   1,   2,   3,   4,   5,   6,   7,   8,   9,   10,  11,  12,  13,  14,
  15,  16,  17,  18,  19,  20,  21,  22,  23,  24,  25,  26,  27,  28,  29,
  30,  31,  32,  33,  34,  35,  36,  37,  38,  39,  40,  41,  42,  43,  44,
  45,  46,  47,  48,  49,  50,  51,  52,  53,  54,  55,  56,  57,  58,  59,
  60,  61,  62,  63,  64,  65,  66,  67,  68,  69,  70,  71,  72,  73,  74,
  75,  76,  77,  78,  79,  80,  81,  82,  83,  84,  85,  86,  87,  88,  89,
  90,  91,  92,  93,  94,  95,  96,  97,  98,  99,  100, 101, 102, 103, 104,
  105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119,
  120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134,
  135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149,
  150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164,
  165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179,
  180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194,
  195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209,
  210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224,
  225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239,
  240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254,
  255, 256, 257, 258, 259, 260, 261, 262, 263, 264, 265, 266, 267, 268, 269,
  270, 271, 272, 273, 274, 275, 276, 277, 278, 279, 280, 281, 282, 283, 284,
  285, 286, 287, 288, 289, 290, 291, 292, 293, 294, 295, 296, 297, 298, 299,
  300, 301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312, 313, 314,
  315, 316, 317, 318, 319, 320, 321, 322, 323, 324, 325, 326, 327, 328, 329,
  330, 331, 332, 333, 334, 335, 336, 337, 338, 339, 340, 341, 342, 343, 344,
  345, 346, 347, 348, 349, 350, 351, 352, 353, 354, 355, 356, 357, 358, 359,
  360, 361, 362, 363, 364, 365, 366, 367, 368, 369, 370, 371, 372, 373, 374,
  375, 376, 377, 378, 379, 380, 381, 382, 383, 384, 385, 386, 387, 388, 389,
  390, 391, 392, 393, 394, 395, 396, 397, 398, 399, 400, 401, 402, 403, 404,
  405, 406, 407, 408, 409, 410, 411, 412, 413, 414, 415, 416, 417, 418, 419,
  420, 421, 422, 423, 424, 425, 426, 427, 428, 429, 430, 431, 432, 433, 434,
  435, 436, 437, 438, 439, 440, 441, 442, 443, 444, 445, 446, 447, 448, 449,
  450, 451, 452, 453, 454, 455, 456, 457, 458, 459, 460, 461, 462, 463, 464,
  465, 466, 467, 468, 469, 470, 471, 472, 473, 474, 475, 476, 477, 478, 479,
  480, 481, 482, 483, 484, 485, 486, 487, 488, 489, 490, 491, 492, 493, 494,
  495, 496, 497, 498, 499, 500, 501, 502, 503, 504, 505, 506, 507, 508, 509,
  510, 511,
};
#endif  // CONFIG_EXT_TX

DECLARE_ALIGNED(16, static const int16_t, default_scan_16x16[256]) = {
  0,   16,  1,   32,  17,  2,   48,  33,  18,  3,   64,  34,  49,  19,  65,
  80,  50,  4,   35,  66,  20,  81,  96,  51,  5,   36,  82,  97,  67,  112,
  21,  52,  98,  37,  83,  113, 6,   68,  128, 53,  22,  99,  114, 84,  7,
  129, 38,  69,  100, 115, 144, 130, 85,  54,  23,  8,   145, 39,  70,  116,
  101, 131, 160, 146, 55,  86,  24,  71,  132, 117, 161, 40,  9,   102, 147,
  176, 162, 87,  56,  25,  133, 118, 177, 148, 72,  103, 41,  163, 10,  192,
  178, 88,  57,  134, 149, 119, 26,  164, 73,  104, 193, 42,  179, 208, 11,
  135, 89,  165, 120, 150, 58,  194, 180, 27,  74,  209, 105, 151, 136, 43,
  90,  224, 166, 195, 181, 121, 210, 59,  12,  152, 106, 167, 196, 75,  137,
  225, 211, 240, 182, 122, 91,  28,  197, 13,  226, 168, 183, 153, 44,  212,
  138, 107, 241, 60,  29,  123, 198, 184, 227, 169, 242, 76,  213, 154, 45,
  92,  14,  199, 139, 61,  228, 214, 170, 185, 243, 108, 77,  155, 30,  15,
  200, 229, 124, 215, 244, 93,  46,  186, 171, 201, 109, 140, 230, 62,  216,
  245, 31,  125, 78,  156, 231, 47,  187, 202, 217, 94,  246, 141, 63,  232,
  172, 110, 247, 157, 79,  218, 203, 126, 233, 188, 248, 95,  173, 142, 219,
  111, 249, 234, 158, 127, 189, 204, 250, 235, 143, 174, 220, 205, 159, 251,
  190, 221, 175, 236, 237, 191, 206, 252, 222, 253, 207, 238, 223, 254, 239,
  255,
};

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t, mcol_scan_16x16[256]) = {
  0,  16, 32, 48, 64, 80, 96,  112, 128, 144, 160, 176, 192, 208, 224, 240,
  1,  17, 33, 49, 65, 81, 97,  113, 129, 145, 161, 177, 193, 209, 225, 241,
  2,  18, 34, 50, 66, 82, 98,  114, 130, 146, 162, 178, 194, 210, 226, 242,
  3,  19, 35, 51, 67, 83, 99,  115, 131, 147, 163, 179, 195, 211, 227, 243,
  4,  20, 36, 52, 68, 84, 100, 116, 132, 148, 164, 180, 196, 212, 228, 244,
  5,  21, 37, 53, 69, 85, 101, 117, 133, 149, 165, 181, 197, 213, 229, 245,
  6,  22, 38, 54, 70, 86, 102, 118, 134, 150, 166, 182, 198, 214, 230, 246,
  7,  23, 39, 55, 71, 87, 103, 119, 135, 151, 167, 183, 199, 215, 231, 247,
  8,  24, 40, 56, 72, 88, 104, 120, 136, 152, 168, 184, 200, 216, 232, 248,
  9,  25, 41, 57, 73, 89, 105, 121, 137, 153, 169, 185, 201, 217, 233, 249,
  10, 26, 42, 58, 74, 90, 106, 122, 138, 154, 170, 186, 202, 218, 234, 250,
  11, 27, 43, 59, 75, 91, 107, 123, 139, 155, 171, 187, 203, 219, 235, 251,
  12, 28, 44, 60, 76, 92, 108, 124, 140, 156, 172, 188, 204, 220, 236, 252,
  13, 29, 45, 61, 77, 93, 109, 125, 141, 157, 173, 189, 205, 221, 237, 253,
  14, 30, 46, 62, 78, 94, 110, 126, 142, 158, 174, 190, 206, 222, 238, 254,
  15, 31, 47, 63, 79, 95, 111, 127, 143, 159, 175, 191, 207, 223, 239, 255,
};

DECLARE_ALIGNED(16, static const int16_t, mrow_scan_16x16[256]) = {
  0,   1,   2,   3,   4,   5,   6,   7,   8,   9,   10,  11,  12,  13,  14,
  15,  16,  17,  18,  19,  20,  21,  22,  23,  24,  25,  26,  27,  28,  29,
  30,  31,  32,  33,  34,  35,  36,  37,  38,  39,  40,  41,  42,  43,  44,
  45,  46,  47,  48,  49,  50,  51,  52,  53,  54,  55,  56,  57,  58,  59,
  60,  61,  62,  63,  64,  65,  66,  67,  68,  69,  70,  71,  72,  73,  74,
  75,  76,  77,  78,  79,  80,  81,  82,  83,  84,  85,  86,  87,  88,  89,
  90,  91,  92,  93,  94,  95,  96,  97,  98,  99,  100, 101, 102, 103, 104,
  105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119,
  120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134,
  135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149,
  150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164,
  165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179,
  180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194,
  195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209,
  210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224,
  225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239,
  240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254,
  255,
};
#endif  // CONFIG_EXT_TX

DECLARE_ALIGNED(16, static const int16_t, col_scan_16x16[256]) = {
  0,   16,  32,  48,  1,   64,  17,  80,  33,  96,  49,  2,   65,  112, 18,
  81,  34,  128, 50,  97,  3,   66,  144, 19,  113, 35,  82,  160, 98,  51,
  129, 4,   67,  176, 20,  114, 145, 83,  36,  99,  130, 52,  192, 5,   161,
  68,  115, 21,  146, 84,  208, 177, 37,  131, 100, 53,  162, 224, 69,  6,
  116, 193, 147, 85,  22,  240, 132, 38,  178, 101, 163, 54,  209, 117, 70,
  7,   148, 194, 86,  179, 225, 23,  133, 39,  164, 8,   102, 210, 241, 55,
  195, 118, 149, 71,  180, 24,  87,  226, 134, 165, 211, 40,  103, 56,  72,
  150, 196, 242, 119, 9,   181, 227, 88,  166, 25,  135, 41,  104, 212, 57,
  151, 197, 120, 73,  243, 182, 136, 167, 213, 89,  10,  228, 105, 152, 198,
  26,  42,  121, 183, 244, 168, 58,  137, 229, 74,  214, 90,  153, 199, 184,
  11,  106, 245, 27,  122, 230, 169, 43,  215, 59,  200, 138, 185, 246, 75,
  12,  91,  154, 216, 231, 107, 28,  44,  201, 123, 170, 60,  247, 232, 76,
  139, 13,  92,  217, 186, 248, 155, 108, 29,  124, 45,  202, 233, 171, 61,
  14,  77,  140, 15,  249, 93,  30,  187, 156, 218, 46,  109, 125, 62,  172,
  78,  203, 31,  141, 234, 94,  47,  188, 63,  157, 110, 250, 219, 79,  126,
  204, 173, 142, 95,  189, 111, 235, 158, 220, 251, 127, 174, 143, 205, 236,
  159, 190, 221, 252, 175, 206, 237, 191, 253, 222, 238, 207, 254, 223, 239,
  255,
};

DECLARE_ALIGNED(16, static const int16_t, row_scan_16x16[256]) = {
  0,   1,   2,   16,  3,   17,  4,   18,  32,  5,   33,  19,  6,   34,  48,
  20,  49,  7,   35,  21,  50,  64,  8,   36,  65,  22,  51,  37,  80,  9,
  66,  52,  23,  38,  81,  67,  10,  53,  24,  82,  68,  96,  39,  11,  54,
  83,  97,  69,  25,  98,  84,  40,  112, 55,  12,  70,  99,  113, 85,  26,
  41,  56,  114, 100, 13,  71,  128, 86,  27,  115, 101, 129, 42,  57,  72,
  116, 14,  87,  130, 102, 144, 73,  131, 117, 28,  58,  15,  88,  43,  145,
  103, 132, 146, 118, 74,  160, 89,  133, 104, 29,  59,  147, 119, 44,  161,
  148, 90,  105, 134, 162, 120, 176, 75,  135, 149, 30,  60,  163, 177, 45,
  121, 91,  106, 164, 178, 150, 192, 136, 165, 179, 31,  151, 193, 76,  122,
  61,  137, 194, 107, 152, 180, 208, 46,  166, 167, 195, 92,  181, 138, 209,
  123, 153, 224, 196, 77,  168, 210, 182, 240, 108, 197, 62,  154, 225, 183,
  169, 211, 47,  139, 93,  184, 226, 212, 241, 198, 170, 124, 155, 199, 78,
  213, 185, 109, 227, 200, 63,  228, 242, 140, 214, 171, 186, 156, 229, 243,
  125, 94,  201, 244, 215, 216, 230, 141, 187, 202, 79,  172, 110, 157, 245,
  217, 231, 95,  246, 232, 126, 203, 247, 233, 173, 218, 142, 111, 158, 188,
  248, 127, 234, 219, 249, 189, 204, 143, 174, 159, 250, 235, 205, 220, 175,
  190, 251, 221, 191, 206, 236, 207, 237, 252, 222, 253, 223, 238, 239, 254,
  255,
};

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t, mcol_scan_32x32[1024]) = {
  0,   32,   64,  96,   128, 160,  192, 224,  256, 288,  320, 352,  384, 416,
  448, 480,  512, 544,  576, 608,  640, 672,  704, 736,  768, 800,  832, 864,
  896, 928,  960, 992,  1,   33,   65,  97,   129, 161,  193, 225,  257, 289,
  321, 353,  385, 417,  449, 481,  513, 545,  577, 609,  641, 673,  705, 737,
  769, 801,  833, 865,  897, 929,  961, 993,  2,   34,   66,  98,   130, 162,
  194, 226,  258, 290,  322, 354,  386, 418,  450, 482,  514, 546,  578, 610,
  642, 674,  706, 738,  770, 802,  834, 866,  898, 930,  962, 994,  3,   35,
  67,  99,   131, 163,  195, 227,  259, 291,  323, 355,  387, 419,  451, 483,
  515, 547,  579, 611,  643, 675,  707, 739,  771, 803,  835, 867,  899, 931,
  963, 995,  4,   36,   68,  100,  132, 164,  196, 228,  260, 292,  324, 356,
  388, 420,  452, 484,  516, 548,  580, 612,  644, 676,  708, 740,  772, 804,
  836, 868,  900, 932,  964, 996,  5,   37,   69,  101,  133, 165,  197, 229,
  261, 293,  325, 357,  389, 421,  453, 485,  517, 549,  581, 613,  645, 677,
  709, 741,  773, 805,  837, 869,  901, 933,  965, 997,  6,   38,   70,  102,
  134, 166,  198, 230,  262, 294,  326, 358,  390, 422,  454, 486,  518, 550,
  582, 614,  646, 678,  710, 742,  774, 806,  838, 870,  902, 934,  966, 998,
  7,   39,   71,  103,  135, 167,  199, 231,  263, 295,  327, 359,  391, 423,
  455, 487,  519, 551,  583, 615,  647, 679,  711, 743,  775, 807,  839, 871,
  903, 935,  967, 999,  8,   40,   72,  104,  136, 168,  200, 232,  264, 296,
  328, 360,  392, 424,  456, 488,  520, 552,  584, 616,  648, 680,  712, 744,
  776, 808,  840, 872,  904, 936,  968, 1000, 9,   41,   73,  105,  137, 169,
  201, 233,  265, 297,  329, 361,  393, 425,  457, 489,  521, 553,  585, 617,
  649, 681,  713, 745,  777, 809,  841, 873,  905, 937,  969, 1001, 10,  42,
  74,  106,  138, 170,  202, 234,  266, 298,  330, 362,  394, 426,  458, 490,
  522, 554,  586, 618,  650, 682,  714, 746,  778, 810,  842, 874,  906, 938,
  970, 1002, 11,  43,   75,  107,  139, 171,  203, 235,  267, 299,  331, 363,
  395, 427,  459, 491,  523, 555,  587, 619,  651, 683,  715, 747,  779, 811,
  843, 875,  907, 939,  971, 1003, 12,  44,   76,  108,  140, 172,  204, 236,
  268, 300,  332, 364,  396, 428,  460, 492,  524, 556,  588, 620,  652, 684,
  716, 748,  780, 812,  844, 876,  908, 940,  972, 1004, 13,  45,   77,  109,
  141, 173,  205, 237,  269, 301,  333, 365,  397, 429,  461, 493,  525, 557,
  589, 621,  653, 685,  717, 749,  781, 813,  845, 877,  909, 941,  973, 1005,
  14,  46,   78,  110,  142, 174,  206, 238,  270, 302,  334, 366,  398, 430,
  462, 494,  526, 558,  590, 622,  654, 686,  718, 750,  782, 814,  846, 878,
  910, 942,  974, 1006, 15,  47,   79,  111,  143, 175,  207, 239,  271, 303,
  335, 367,  399, 431,  463, 495,  527, 559,  591, 623,  655, 687,  719, 751,
  783, 815,  847, 879,  911, 943,  975, 1007, 16,  48,   80,  112,  144, 176,
  208, 240,  272, 304,  336, 368,  400, 432,  464, 496,  528, 560,  592, 624,
  656, 688,  720, 752,  784, 816,  848, 880,  912, 944,  976, 1008, 17,  49,
  81,  113,  145, 177,  209, 241,  273, 305,  337, 369,  401, 433,  465, 497,
  529, 561,  593, 625,  657, 689,  721, 753,  785, 817,  849, 881,  913, 945,
  977, 1009, 18,  50,   82,  114,  146, 178,  210, 242,  274, 306,  338, 370,
  402, 434,  466, 498,  530, 562,  594, 626,  658, 690,  722, 754,  786, 818,
  850, 882,  914, 946,  978, 1010, 19,  51,   83,  115,  147, 179,  211, 243,
  275, 307,  339, 371,  403, 435,  467, 499,  531, 563,  595, 627,  659, 691,
  723, 755,  787, 819,  851, 883,  915, 947,  979, 1011, 20,  52,   84,  116,
  148, 180,  212, 244,  276, 308,  340, 372,  404, 436,  468, 500,  532, 564,
  596, 628,  660, 692,  724, 756,  788, 820,  852, 884,  916, 948,  980, 1012,
  21,  53,   85,  117,  149, 181,  213, 245,  277, 309,  341, 373,  405, 437,
  469, 501,  533, 565,  597, 629,  661, 693,  725, 757,  789, 821,  853, 885,
  917, 949,  981, 1013, 22,  54,   86,  118,  150, 182,  214, 246,  278, 310,
  342, 374,  406, 438,  470, 502,  534, 566,  598, 630,  662, 694,  726, 758,
  790, 822,  854, 886,  918, 950,  982, 1014, 23,  55,   87,  119,  151, 183,
  215, 247,  279, 311,  343, 375,  407, 439,  471, 503,  535, 567,  599, 631,
  663, 695,  727, 759,  791, 823,  855, 887,  919, 951,  983, 1015, 24,  56,
  88,  120,  152, 184,  216, 248,  280, 312,  344, 376,  408, 440,  472, 504,
  536, 568,  600, 632,  664, 696,  728, 760,  792, 824,  856, 888,  920, 952,
  984, 1016, 25,  57,   89,  121,  153, 185,  217, 249,  281, 313,  345, 377,
  409, 441,  473, 505,  537, 569,  601, 633,  665, 697,  729, 761,  793, 825,
  857, 889,  921, 953,  985, 1017, 26,  58,   90,  122,  154, 186,  218, 250,
  282, 314,  346, 378,  410, 442,  474, 506,  538, 570,  602, 634,  666, 698,
  730, 762,  794, 826,  858, 890,  922, 954,  986, 1018, 27,  59,   91,  123,
  155, 187,  219, 251,  283, 315,  347, 379,  411, 443,  475, 507,  539, 571,
  603, 635,  667, 699,  731, 763,  795, 827,  859, 891,  923, 955,  987, 1019,
  28,  60,   92,  124,  156, 188,  220, 252,  284, 316,  348, 380,  412, 444,
  476, 508,  540, 572,  604, 636,  668, 700,  732, 764,  796, 828,  860, 892,
  924, 956,  988, 1020, 29,  61,   93,  125,  157, 189,  221, 253,  285, 317,
  349, 381,  413, 445,  477, 509,  541, 573,  605, 637,  669, 701,  733, 765,
  797, 829,  861, 893,  925, 957,  989, 1021, 30,  62,   94,  126,  158, 190,
  222, 254,  286, 318,  350, 382,  414, 446,  478, 510,  542, 574,  606, 638,
  670, 702,  734, 766,  798, 830,  862, 894,  926, 958,  990, 1022, 31,  63,
  95,  127,  159, 191,  223, 255,  287, 319,  351, 383,  415, 447,  479, 511,
  543, 575,  607, 639,  671, 703,  735, 767,  799, 831,  863, 895,  927, 959,
  991, 1023,
};

DECLARE_ALIGNED(16, static const int16_t, mrow_scan_32x32[1024]) = {
  0,    1,    2,    3,    4,    5,    6,    7,    8,    9,    10,   11,   12,
  13,   14,   15,   16,   17,   18,   19,   20,   21,   22,   23,   24,   25,
  26,   27,   28,   29,   30,   31,   32,   33,   34,   35,   36,   37,   38,
  39,   40,   41,   42,   43,   44,   45,   46,   47,   48,   49,   50,   51,
  52,   53,   54,   55,   56,   57,   58,   59,   60,   61,   62,   63,   64,
  65,   66,   67,   68,   69,   70,   71,   72,   73,   74,   75,   76,   77,
  78,   79,   80,   81,   82,   83,   84,   85,   86,   87,   88,   89,   90,
  91,   92,   93,   94,   95,   96,   97,   98,   99,   100,  101,  102,  103,
  104,  105,  106,  107,  108,  109,  110,  111,  112,  113,  114,  115,  116,
  117,  118,  119,  120,  121,  122,  123,  124,  125,  126,  127,  128,  129,
  130,  131,  132,  133,  134,  135,  136,  137,  138,  139,  140,  141,  142,
  143,  144,  145,  146,  147,  148,  149,  150,  151,  152,  153,  154,  155,
  156,  157,  158,  159,  160,  161,  162,  163,  164,  165,  166,  167,  168,
  169,  170,  171,  172,  173,  174,  175,  176,  177,  178,  179,  180,  181,
  182,  183,  184,  185,  186,  187,  188,  189,  190,  191,  192,  193,  194,
  195,  196,  197,  198,  199,  200,  201,  202,  203,  204,  205,  206,  207,
  208,  209,  210,  211,  212,  213,  214,  215,  216,  217,  218,  219,  220,
  221,  222,  223,  224,  225,  226,  227,  228,  229,  230,  231,  232,  233,
  234,  235,  236,  237,  238,  239,  240,  241,  242,  243,  244,  245,  246,
  247,  248,  249,  250,  251,  252,  253,  254,  255,  256,  257,  258,  259,
  260,  261,  262,  263,  264,  265,  266,  267,  268,  269,  270,  271,  272,
  273,  274,  275,  276,  277,  278,  279,  280,  281,  282,  283,  284,  285,
  286,  287,  288,  289,  290,  291,  292,  293,  294,  295,  296,  297,  298,
  299,  300,  301,  302,  303,  304,  305,  306,  307,  308,  309,  310,  311,
  312,  313,  314,  315,  316,  317,  318,  319,  320,  321,  322,  323,  324,
  325,  326,  327,  328,  329,  330,  331,  332,  333,  334,  335,  336,  337,
  338,  339,  340,  341,  342,  343,  344,  345,  346,  347,  348,  349,  350,
  351,  352,  353,  354,  355,  356,  357,  358,  359,  360,  361,  362,  363,
  364,  365,  366,  367,  368,  369,  370,  371,  372,  373,  374,  375,  376,
  377,  378,  379,  380,  381,  382,  383,  384,  385,  386,  387,  388,  389,
  390,  391,  392,  393,  394,  395,  396,  397,  398,  399,  400,  401,  402,
  403,  404,  405,  406,  407,  408,  409,  410,  411,  412,  413,  414,  415,
  416,  417,  418,  419,  420,  421,  422,  423,  424,  425,  426,  427,  428,
  429,  430,  431,  432,  433,  434,  435,  436,  437,  438,  439,  440,  441,
  442,  443,  444,  445,  446,  447,  448,  449,  450,  451,  452,  453,  454,
  455,  456,  457,  458,  459,  460,  461,  462,  463,  464,  465,  466,  467,
  468,  469,  470,  471,  472,  473,  474,  475,  476,  477,  478,  479,  480,
  481,  482,  483,  484,  485,  486,  487,  488,  489,  490,  491,  492,  493,
  494,  495,  496,  497,  498,  499,  500,  501,  502,  503,  504,  505,  506,
  507,  508,  509,  510,  511,  512,  513,  514,  515,  516,  517,  518,  519,
  520,  521,  522,  523,  524,  525,  526,  527,  528,  529,  530,  531,  532,
  533,  534,  535,  536,  537,  538,  539,  540,  541,  542,  543,  544,  545,
  546,  547,  548,  549,  550,  551,  552,  553,  554,  555,  556,  557,  558,
  559,  560,  561,  562,  563,  564,  565,  566,  567,  568,  569,  570,  571,
  572,  573,  574,  575,  576,  577,  578,  579,  580,  581,  582,  583,  584,
  585,  586,  587,  588,  589,  590,  591,  592,  593,  594,  595,  596,  597,
  598,  599,  600,  601,  602,  603,  604,  605,  606,  607,  608,  609,  610,
  611,  612,  613,  614,  615,  616,  617,  618,  619,  620,  621,  622,  623,
  624,  625,  626,  627,  628,  629,  630,  631,  632,  633,  634,  635,  636,
  637,  638,  639,  640,  641,  642,  643,  644,  645,  646,  647,  648,  649,
  650,  651,  652,  653,  654,  655,  656,  657,  658,  659,  660,  661,  662,
  663,  664,  665,  666,  667,  668,  669,  670,  671,  672,  673,  674,  675,
  676,  677,  678,  679,  680,  681,  682,  683,  684,  685,  686,  687,  688,
  689,  690,  691,  692,  693,  694,  695,  696,  697,  698,  699,  700,  701,
  702,  703,  704,  705,  706,  707,  708,  709,  710,  711,  712,  713,  714,
  715,  716,  717,  718,  719,  720,  721,  722,  723,  724,  725,  726,  727,
  728,  729,  730,  731,  732,  733,  734,  735,  736,  737,  738,  739,  740,
  741,  742,  743,  744,  745,  746,  747,  748,  749,  750,  751,  752,  753,
  754,  755,  756,  757,  758,  759,  760,  761,  762,  763,  764,  765,  766,
  767,  768,  769,  770,  771,  772,  773,  774,  775,  776,  777,  778,  779,
  780,  781,  782,  783,  784,  785,  786,  787,  788,  789,  790,  791,  792,
  793,  794,  795,  796,  797,  798,  799,  800,  801,  802,  803,  804,  805,
  806,  807,  808,  809,  810,  811,  812,  813,  814,  815,  816,  817,  818,
  819,  820,  821,  822,  823,  824,  825,  826,  827,  828,  829,  830,  831,
  832,  833,  834,  835,  836,  837,  838,  839,  840,  841,  842,  843,  844,
  845,  846,  847,  848,  849,  850,  851,  852,  853,  854,  855,  856,  857,
  858,  859,  860,  861,  862,  863,  864,  865,  866,  867,  868,  869,  870,
  871,  872,  873,  874,  875,  876,  877,  878,  879,  880,  881,  882,  883,
  884,  885,  886,  887,  888,  889,  890,  891,  892,  893,  894,  895,  896,
  897,  898,  899,  900,  901,  902,  903,  904,  905,  906,  907,  908,  909,
  910,  911,  912,  913,  914,  915,  916,  917,  918,  919,  920,  921,  922,
  923,  924,  925,  926,  927,  928,  929,  930,  931,  932,  933,  934,  935,
  936,  937,  938,  939,  940,  941,  942,  943,  944,  945,  946,  947,  948,
  949,  950,  951,  952,  953,  954,  955,  956,  957,  958,  959,  960,  961,
  962,  963,  964,  965,  966,  967,  968,  969,  970,  971,  972,  973,  974,
  975,  976,  977,  978,  979,  980,  981,  982,  983,  984,  985,  986,  987,
  988,  989,  990,  991,  992,  993,  994,  995,  996,  997,  998,  999,  1000,
  1001, 1002, 1003, 1004, 1005, 1006, 1007, 1008, 1009, 1010, 1011, 1012, 1013,
  1014, 1015, 1016, 1017, 1018, 1019, 1020, 1021, 1022, 1023,
};
#endif  // CONFIG_EXT_TX

DECLARE_ALIGNED(16, static const int16_t, default_scan_32x32[1024]) = {
  0,    32,   1,    64,  33,   2,    96,   65,   34,   128,  3,    97,   66,
  160,  129,  35,   98,  4,    67,   130,  161,  192,  36,   99,   224,  5,
  162,  193,  68,   131, 37,   100,  225,  194,  256,  163,  69,   132,  6,
  226,  257,  288,  195, 101,  164,  38,   258,  7,    227,  289,  133,  320,
  70,   196,  165,  290, 259,  228,  39,   321,  102,  352,  8,    197,  71,
  134,  322,  291,  260, 353,  384,  229,  166,  103,  40,   354,  323,  292,
  135,  385,  198,  261, 72,   9,    416,  167,  386,  355,  230,  324,  104,
  293,  41,   417,  199, 136,  262,  387,  448,  325,  356,  10,   73,   418,
  231,  168,  449,  294, 388,  105,  419,  263,  42,   200,  357,  450,  137,
  480,  74,   326,  232, 11,   389,  169,  295,  420,  106,  451,  481,  358,
  264,  327,  201,  43,  138,  512,  482,  390,  296,  233,  170,  421,  75,
  452,  359,  12,   513, 265,  483,  328,  107,  202,  514,  544,  422,  391,
  453,  139,  44,   234, 484,  297,  360,  171,  76,   515,  545,  266,  329,
  454,  13,   423,  203, 108,  546,  485,  576,  298,  235,  140,  361,  330,
  172,  547,  45,   455, 267,  577,  486,  77,   204,  362,  608,  14,   299,
  578,  109,  236,  487, 609,  331,  141,  579,  46,   15,   173,  610,  363,
  78,   205,  16,   110, 237,  611,  142,  47,   174,  79,   206,  17,   111,
  238,  48,   143,  80,  175,  112,  207,  49,   18,   239,  81,   113,  19,
  50,   82,   114,  51,  83,   115,  640,  516,  392,  268,  144,  20,   672,
  641,  548,  517,  424, 393,  300,  269,  176,  145,  52,   21,   704,  673,
  642,  580,  549,  518, 456,  425,  394,  332,  301,  270,  208,  177,  146,
  84,   53,   22,   736, 705,  674,  643,  612,  581,  550,  519,  488,  457,
  426,  395,  364,  333, 302,  271,  240,  209,  178,  147,  116,  85,   54,
  23,   737,  706,  675, 613,  582,  551,  489,  458,  427,  365,  334,  303,
  241,  210,  179,  117, 86,   55,   738,  707,  614,  583,  490,  459,  366,
  335,  242,  211,  118, 87,   739,  615,  491,  367,  243,  119,  768,  644,
  520,  396,  272,  148, 24,   800,  769,  676,  645,  552,  521,  428,  397,
  304,  273,  180,  149, 56,   25,   832,  801,  770,  708,  677,  646,  584,
  553,  522,  460,  429, 398,  336,  305,  274,  212,  181,  150,  88,   57,
  26,   864,  833,  802, 771,  740,  709,  678,  647,  616,  585,  554,  523,
  492,  461,  430,  399, 368,  337,  306,  275,  244,  213,  182,  151,  120,
  89,   58,   27,   865, 834,  803,  741,  710,  679,  617,  586,  555,  493,
  462,  431,  369,  338, 307,  245,  214,  183,  121,  90,   59,   866,  835,
  742,  711,  618,  587, 494,  463,  370,  339,  246,  215,  122,  91,   867,
  743,  619,  495,  371, 247,  123,  896,  772,  648,  524,  400,  276,  152,
  28,   928,  897,  804, 773,  680,  649,  556,  525,  432,  401,  308,  277,
  184,  153,  60,   29,  960,  929,  898,  836,  805,  774,  712,  681,  650,
  588,  557,  526,  464, 433,  402,  340,  309,  278,  216,  185,  154,  92,
  61,   30,   992,  961, 930,  899,  868,  837,  806,  775,  744,  713,  682,
  651,  620,  589,  558, 527,  496,  465,  434,  403,  372,  341,  310,  279,
  248,  217,  186,  155, 124,  93,   62,   31,   993,  962,  931,  869,  838,
  807,  745,  714,  683, 621,  590,  559,  497,  466,  435,  373,  342,  311,
  249,  218,  187,  125, 94,   63,   994,  963,  870,  839,  746,  715,  622,
  591,  498,  467,  374, 343,  250,  219,  126,  95,   995,  871,  747,  623,
  499,  375,  251,  127, 900,  776,  652,  528,  404,  280,  156,  932,  901,
  808,  777,  684,  653, 560,  529,  436,  405,  312,  281,  188,  157,  964,
  933,  902,  840,  809, 778,  716,  685,  654,  592,  561,  530,  468,  437,
  406,  344,  313,  282, 220,  189,  158,  996,  965,  934,  903,  872,  841,
  810,  779,  748,  717, 686,  655,  624,  593,  562,  531,  500,  469,  438,
  407,  376,  345,  314, 283,  252,  221,  190,  159,  997,  966,  935,  873,
  842,  811,  749,  718, 687,  625,  594,  563,  501,  470,  439,  377,  346,
  315,  253,  222,  191, 998,  967,  874,  843,  750,  719,  626,  595,  502,
  471,  378,  347,  254, 223,  999,  875,  751,  627,  503,  379,  255,  904,
  780,  656,  532,  408, 284,  936,  905,  812,  781,  688,  657,  564,  533,
  440,  409,  316,  285, 968,  937,  906,  844,  813,  782,  720,  689,  658,
  596,  565,  534,  472, 441,  410,  348,  317,  286,  1000, 969,  938,  907,
  876,  845,  814,  783, 752,  721,  690,  659,  628,  597,  566,  535,  504,
  473,  442,  411,  380, 349,  318,  287,  1001, 970,  939,  877,  846,  815,
  753,  722,  691,  629, 598,  567,  505,  474,  443,  381,  350,  319,  1002,
  971,  878,  847,  754, 723,  630,  599,  506,  475,  382,  351,  1003, 879,
  755,  631,  507,  383, 908,  784,  660,  536,  412,  940,  909,  816,  785,
  692,  661,  568,  537, 444,  413,  972,  941,  910,  848,  817,  786,  724,
  693,  662,  600,  569, 538,  476,  445,  414,  1004, 973,  942,  911,  880,
  849,  818,  787,  756, 725,  694,  663,  632,  601,  570,  539,  508,  477,
  446,  415,  1005, 974, 943,  881,  850,  819,  757,  726,  695,  633,  602,
  571,  509,  478,  447, 1006, 975,  882,  851,  758,  727,  634,  603,  510,
  479,  1007, 883,  759, 635,  511,  912,  788,  664,  540,  944,  913,  820,
  789,  696,  665,  572, 541,  976,  945,  914,  852,  821,  790,  728,  697,
  666,  604,  573,  542, 1008, 977,  946,  915,  884,  853,  822,  791,  760,
  729,  698,  667,  636, 605,  574,  543,  1009, 978,  947,  885,  854,  823,
  761,  730,  699,  637, 606,  575,  1010, 979,  886,  855,  762,  731,  638,
  607,  1011, 887,  763, 639,  916,  792,  668,  948,  917,  824,  793,  700,
  669,  980,  949,  918, 856,  825,  794,  732,  701,  670,  1012, 981,  950,
  919,  888,  857,  826, 795,  764,  733,  702,  671,  1013, 982,  951,  889,
  858,  827,  765,  734, 703,  1014, 983,  890,  859,  766,  735,  1015, 891,
  767,  920,  796,  952, 921,  828,  797,  984,  953,  922,  860,  829,  798,
  1016, 985,  954,  923, 892,  861,  830,  799,  1017, 986,  955,  893,  862,
  831,  1018, 987,  894, 863,  1019, 895,  924,  956,  925,  988,  957,  926,
  1020, 989,  958,  927, 1021, 990,  959,  1022, 991,  1023,
};

#if CONFIG_EXT_TX
// Scan over two rectangular vertical partitions one after the other
DECLARE_ALIGNED(16, static const int16_t, v2_scan_32x32[1024]) = {
  0,    1,    32,   33,   2,    64,   34,   65,   66,   3,    96,   35,   97,
  67,   98,   4,    128,  36,   129,  99,   68,   130,  5,    100,  131,  160,
  37,   161,  69,   162,  132,  101,  163,  6,    192,  38,   193,  70,   194,
  133,  164,  102,  195,  7,    224,  39,   165,  225,  134,  196,  71,   226,
  103,  227,  166,  197,  8,    256,  40,   135,  228,  257,  72,   258,  198,
  104,  259,  167,  229,  136,  260,  9,    288,  41,   289,  73,   199,  230,
  290,  168,  261,  105,  291,  137,  292,  231,  10,   200,  262,  320,  42,
  321,  74,   322,  169,  293,  106,  323,  232,  263,  138,  324,  201,  294,
  11,   352,  43,   353,  75,   170,  325,  354,  264,  107,  233,  295,  355,
  202,  326,  139,  356,  12,   384,  44,   265,  296,  385,  171,  357,  76,
  386,  234,  327,  108,  387,  203,  358,  140,  388,  297,  266,  328,  13,
  172,  389,  416,  45,   235,  359,  417,  77,   418,  109,  419,  204,  390,
  298,  329,  141,  267,  360,  420,  236,  391,  173,  421,  14,   448,  46,
  449,  78,   330,  450,  299,  361,  110,  205,  422,  451,  268,  392,  142,
  452,  237,  423,  174,  331,  362,  453,  15,   300,  393,  480,  47,   481,
  79,   482,  206,  454,  269,  424,  111,  483,  143,  484,  363,  332,  394,
  238,  455,  175,  301,  425,  485,  512,  513,  270,  456,  514,  207,  486,
  364,  395,  515,  333,  426,  516,  239,  487,  302,  457,  517,  396,  271,
  488,  544,  365,  427,  545,  518,  546,  334,  458,  547,  519,  548,  303,
  489,  397,  428,  549,  366,  459,  520,  576,  335,  490,  550,  577,  578,
  579,  521,  429,  551,  398,  460,  580,  367,  491,  581,  552,  522,  582,
  608,  609,  430,  461,  610,  399,  492,  553,  611,  583,  523,  612,  613,
  584,  554,  462,  431,  493,  614,  524,  640,  641,  642,  585,  643,  555,
  615,  644,  463,  494,  586,  525,  616,  645,  556,  646,  672,  617,  673,
  587,  674,  647,  495,  675,  526,  676,  557,  618,  648,  677,  588,  678,
  527,  649,  619,  704,  558,  705,  706,  679,  589,  707,  650,  708,  620,
  680,  709,  559,  590,  710,  651,  681,  736,  621,  737,  711,  738,  739,
  682,  652,  740,  712,  591,  741,  622,  683,  713,  742,  653,  768,  769,
  743,  770,  714,  684,  771,  623,  772,  744,  654,  773,  715,  685,  745,
  774,  655,  775,  800,  801,  716,  746,  802,  803,  686,  776,  804,  747,
  805,  717,  777,  806,  687,  748,  807,  778,  832,  833,  718,  834,  835,
  808,  836,  779,  749,  837,  809,  719,  838,  780,  750,  810,  839,  864,
  865,  866,  867,  840,  781,  868,  811,  751,  869,  841,  870,  812,  782,
  842,  871,  896,  897,  898,  872,  899,  813,  843,  900,  783,  901,  873,
  844,  902,  814,  874,  903,  928,  929,  845,  930,  904,  815,  875,  931,
  932,  905,  933,  846,  876,  934,  906,  935,  877,  960,  847,  961,  962,
  907,  936,  963,  964,  937,  878,  965,  908,  966,  938,  967,  909,  879,
  992,  939,  993,  968,  994,  995,  996,  910,  969,  940,  997,  998,  970,
  911,  941,  999,  971,  1000, 942,  1001, 972,  1002, 943,  973,  1003, 974,
  1004, 975,  1005, 1006, 1007, 16,   48,   80,   112,  144,  176,  17,   49,
  208,  81,   113,  145,  240,  177,  272,  18,   50,   209,  82,   114,  304,
  241,  146,  178,  273,  336,  210,  19,   51,   83,   115,  305,  242,  147,
  368,  179,  274,  337,  211,  20,   400,  52,   84,   306,  116,  243,  369,
  148,  338,  180,  275,  432,  401,  212,  21,   53,   307,  85,   370,  244,
  117,  464,  149,  433,  339,  276,  181,  402,  213,  308,  496,  371,  22,
  54,   465,  86,   245,  118,  434,  150,  340,  277,  403,  182,  528,  497,
  214,  466,  372,  309,  23,   55,   435,  87,   246,  119,  341,  404,  151,
  529,  560,  278,  498,  183,  467,  373,  215,  310,  436,  24,   56,   247,
  561,  88,   530,  592,  342,  120,  405,  499,  152,  279,  468,  184,  374,
  311,  437,  216,  562,  593,  531,  624,  25,   248,  500,  57,   406,  89,
  343,  121,  469,  280,  153,  594,  185,  375,  563,  625,  438,  532,  656,
  312,  217,  501,  407,  249,  26,   344,  58,   90,   470,  122,  595,  626,
  281,  564,  657,  154,  376,  533,  688,  439,  186,  313,  502,  218,  408,
  627,  596,  658,  250,  345,  471,  27,   59,   565,  689,  91,   123,  282,
  534,  720,  155,  440,  377,  187,  503,  314,  628,  659,  219,  597,  690,
  409,  472,  566,  721,  346,  251,  28,   60,   535,  752,  92,   124,  283,
  441,  378,  156,  660,  504,  629,  691,  598,  722,  188,  315,  567,  753,
  220,  410,  473,  347,  536,  784,  252,  29,   661,  692,  61,   93,   442,
  630,  723,  284,  125,  379,  505,  599,  754,  157,  316,  568,  785,  189,
  474,  411,  221,  537,  816,  693,  348,  662,  724,  253,  631,  755,  443,
  30,   600,  786,  62,   506,  94,   285,  380,  126,  569,  817,  158,  317,
  190,  475,  694,  725,  412,  663,  756,  538,  848,  222,  632,  787,  349,
  254,  601,  818,  444,  507,  31,   63,   381,  286,  95,   570,  849,  726,
  127,  695,  757,  664,  788,  159,  476,  318,  413,  539,  880,  191,  633,
  819,  223,  350,  602,  850,  508,  255,  445,  727,  758,  696,  789,  571,
  881,  382,  287,  665,  820,  477,  634,  851,  540,  912,  319,  414,  603,
  882,  759,  728,  790,  351,  509,  697,  821,  446,  572,  913,  666,  852,
  383,  635,  883,  478,  541,  944,  415,  760,  791,  604,  914,  729,  822,
  698,  853,  510,  667,  884,  447,  573,  945,  636,  915,  792,  761,  823,
  542,  976,  479,  730,  854,  605,  946,  699,  885,  668,  916,  511,  574,
  977,  793,  824,  637,  947,  762,  855,  731,  886,  543,  1008, 606,  978,
  700,  917,  669,  948,  575,  825,  1009, 794,  856,  763,  887,  638,  979,
  732,  918,  701,  949,  607,  1010, 670,  980,  826,  857,  795,  888,  764,
  919,  639,  1011, 733,  950,  702,  981,  858,  827,  889,  796,  920,  671,
  1012, 765,  951,  734,  982,  703,  1013, 859,  890,  828,  921,  797,  952,
  766,  983,  735,  1014, 891,  860,  922,  829,  953,  798,  984,  767,  1015,
  892,  923,  861,  954,  830,  985,  799,  1016, 924,  893,  955,  862,  986,
  831,  1017, 925,  956,  894,  987,  863,  1018, 957,  926,  988,  895,  1019,
  958,  989,  927,  1020, 990,  959,  1021, 991,  1022, 1023,
};

// Scan over two rectangular horizontal partitions one after the other
DECLARE_ALIGNED(16, static const int16_t, h2_scan_32x32[1024]) = {
  0,    1,    32,   33,   2,    64,   34,   65,   66,   3,    96,   35,   97,
  67,   98,   4,    128,  36,   129,  99,   68,   130,  5,    100,  131,  160,
  37,   161,  69,   162,  132,  101,  163,  6,    192,  38,   193,  70,   194,
  133,  164,  102,  195,  7,    224,  39,   165,  225,  134,  196,  71,   226,
  103,  227,  166,  197,  8,    256,  40,   135,  228,  257,  72,   258,  198,
  104,  259,  167,  229,  136,  260,  9,    288,  41,   289,  73,   199,  230,
  290,  168,  261,  105,  291,  137,  292,  231,  10,   200,  262,  320,  42,
  321,  74,   322,  169,  293,  106,  323,  232,  263,  138,  324,  201,  294,
  11,   352,  43,   353,  75,   170,  325,  354,  264,  107,  233,  295,  355,
  202,  326,  139,  356,  12,   384,  44,   265,  296,  385,  171,  357,  76,
  386,  234,  327,  108,  387,  203,  358,  140,  388,  297,  266,  328,  13,
  172,  389,  416,  45,   235,  359,  417,  77,   418,  109,  419,  204,  390,
  298,  329,  141,  267,  360,  420,  236,  391,  173,  421,  14,   448,  46,
  449,  78,   330,  450,  299,  361,  110,  205,  422,  451,  268,  392,  142,
  452,  237,  423,  174,  331,  362,  453,  15,   300,  393,  480,  47,   481,
  79,   482,  206,  454,  269,  424,  111,  483,  143,  484,  363,  332,  394,
  238,  455,  175,  301,  425,  485,  16,   48,   80,   270,  456,  207,  486,
  112,  364,  395,  333,  426,  144,  239,  487,  302,  457,  176,  396,  17,
  271,  488,  49,   365,  427,  208,  81,   334,  458,  113,  145,  240,  303,
  489,  397,  428,  177,  366,  459,  272,  18,   50,   209,  335,  490,  82,
  114,  304,  241,  429,  146,  398,  460,  367,  491,  178,  273,  336,  210,
  19,   51,   83,   430,  461,  399,  492,  115,  305,  242,  147,  368,  179,
  274,  337,  462,  431,  493,  211,  20,   400,  52,   84,   306,  116,  243,
  369,  148,  463,  494,  338,  180,  275,  432,  401,  212,  21,   53,   307,
  85,   370,  244,  117,  495,  464,  149,  433,  339,  276,  181,  402,  213,
  308,  496,  371,  22,   54,   465,  86,   245,  118,  434,  150,  340,  277,
  403,  182,  497,  214,  466,  372,  309,  23,   55,   435,  87,   246,  119,
  341,  404,  151,  278,  498,  183,  467,  373,  215,  310,  436,  24,   56,
  247,  88,   342,  120,  405,  499,  152,  279,  468,  184,  374,  311,  437,
  216,  25,   248,  500,  57,   406,  89,   343,  121,  469,  280,  153,  185,
  375,  438,  312,  217,  501,  407,  249,  26,   344,  58,   90,   470,  122,
  281,  154,  376,  439,  186,  313,  502,  218,  408,  250,  345,  471,  27,
  59,   91,   123,  282,  155,  440,  377,  187,  503,  314,  219,  409,  472,
  346,  251,  28,   60,   92,   124,  283,  441,  378,  156,  504,  188,  315,
  220,  410,  473,  347,  252,  29,   61,   93,   442,  284,  125,  379,  505,
  157,  316,  189,  474,  411,  221,  348,  253,  443,  30,   62,   506,  94,
  285,  380,  126,  158,  317,  190,  475,  412,  222,  349,  254,  444,  507,
  31,   63,   381,  286,  95,   127,  159,  476,  318,  413,  191,  223,  350,
  508,  255,  445,  382,  287,  477,  319,  414,  351,  509,  446,  383,  478,
  415,  510,  447,  479,  511,  512,  513,  514,  515,  516,  517,  544,  545,
  518,  546,  547,  519,  548,  549,  520,  576,  550,  577,  578,  579,  521,
  551,  580,  581,  552,  522,  582,  608,  609,  610,  553,  611,  583,  523,
  612,  613,  584,  554,  614,  524,  640,  641,  642,  585,  643,  555,  615,
  644,  586,  525,  616,  645,  556,  646,  672,  617,  673,  587,  674,  647,
  675,  526,  676,  557,  618,  648,  677,  588,  678,  527,  649,  619,  704,
  558,  705,  706,  679,  589,  707,  650,  708,  620,  680,  709,  528,  559,
  590,  710,  651,  681,  736,  621,  737,  711,  738,  739,  682,  652,  529,
  560,  740,  712,  591,  741,  622,  683,  713,  742,  653,  768,  769,  561,
  743,  530,  592,  770,  714,  684,  771,  623,  772,  744,  654,  773,  715,
  685,  745,  774,  562,  593,  531,  624,  655,  775,  800,  801,  716,  746,
  802,  803,  686,  776,  804,  594,  563,  625,  747,  805,  717,  532,  656,
  777,  806,  687,  748,  807,  778,  832,  833,  718,  834,  595,  626,  835,
  564,  657,  808,  836,  533,  688,  779,  749,  837,  809,  719,  838,  780,
  627,  596,  658,  750,  810,  839,  864,  565,  689,  865,  866,  867,  534,
  720,  840,  781,  868,  811,  751,  869,  841,  628,  659,  597,  690,  870,
  812,  782,  566,  721,  842,  871,  896,  535,  752,  897,  898,  872,  899,
  813,  843,  660,  900,  783,  629,  691,  598,  722,  901,  873,  567,  753,
  844,  902,  814,  874,  536,  784,  903,  661,  692,  928,  929,  630,  723,
  845,  930,  904,  815,  875,  931,  599,  754,  932,  568,  785,  905,  933,
  846,  876,  934,  537,  816,  693,  662,  724,  906,  631,  755,  935,  877,
  600,  786,  960,  847,  961,  962,  907,  936,  963,  569,  817,  964,  937,
  694,  725,  878,  965,  908,  663,  756,  538,  848,  966,  632,  787,  938,
  601,  818,  967,  909,  879,  992,  939,  993,  968,  570,  849,  994,  726,
  695,  757,  995,  664,  788,  996,  910,  969,  539,  880,  940,  633,  819,
  997,  998,  602,  850,  970,  911,  941,  999,  727,  758,  696,  789,  571,
  881,  971,  665,  820,  1000, 634,  851,  942,  540,  912,  1001, 972,  603,
  882,  759,  728,  790,  1002, 697,  821,  943,  973,  572,  913,  666,  852,
  1003, 635,  883,  974,  541,  944,  760,  791,  1004, 604,  914,  729,  822,
  698,  853,  975,  667,  884,  573,  945,  1005, 636,  915,  792,  761,  823,
  542,  976,  1006, 730,  854,  605,  946,  699,  885,  668,  916,  1007, 574,
  977,  793,  824,  637,  947,  762,  855,  731,  886,  543,  1008, 606,  978,
  700,  917,  669,  948,  575,  825,  1009, 794,  856,  763,  887,  638,  979,
  732,  918,  701,  949,  607,  1010, 670,  980,  826,  857,  795,  888,  764,
  919,  639,  1011, 733,  950,  702,  981,  858,  827,  889,  796,  920,  671,
  1012, 765,  951,  734,  982,  703,  1013, 859,  890,  828,  921,  797,  952,
  766,  983,  735,  1014, 891,  860,  922,  829,  953,  798,  984,  767,  1015,
  892,  923,  861,  954,  830,  985,  799,  1016, 924,  893,  955,  862,  986,
  831,  1017, 925,  956,  894,  987,  863,  1018, 957,  926,  988,  895,  1019,
  958,  989,  927,  1020, 990,  959,  1021, 991,  1022, 1023,
};

// Scan where the top left quarter is scanned first
DECLARE_ALIGNED(16, static const int16_t, qtr_scan_32x32[1024]) = {
  0,    1,    32,   33,   2,    64,   34,   65,   66,   3,    96,   35,   97,
  67,   98,   4,    128,  36,   129,  99,   68,   130,  5,    100,  131,  160,
  37,   161,  69,   162,  132,  101,  163,  6,    192,  38,   193,  70,   194,
  133,  164,  102,  195,  7,    224,  39,   165,  225,  134,  196,  71,   226,
  103,  227,  166,  197,  8,    256,  40,   135,  228,  257,  72,   258,  198,
  104,  259,  167,  229,  136,  260,  9,    288,  41,   289,  73,   199,  230,
  290,  168,  261,  105,  291,  137,  292,  231,  10,   200,  262,  320,  42,
  321,  74,   322,  169,  293,  106,  323,  232,  263,  138,  324,  201,  294,
  11,   352,  43,   353,  75,   170,  325,  354,  264,  107,  233,  295,  355,
  202,  326,  139,  356,  12,   384,  44,   265,  296,  385,  171,  357,  76,
  386,  234,  327,  108,  387,  203,  358,  140,  388,  297,  266,  328,  13,
  172,  389,  416,  45,   235,  359,  417,  77,   418,  109,  419,  204,  390,
  298,  329,  141,  267,  360,  420,  236,  391,  173,  421,  14,   448,  46,
  449,  78,   330,  450,  299,  361,  110,  205,  422,  451,  268,  392,  142,
  452,  237,  423,  174,  331,  362,  453,  15,   300,  393,  480,  47,   481,
  79,   482,  206,  454,  269,  424,  111,  483,  143,  484,  363,  332,  394,
  238,  455,  175,  301,  425,  485,  270,  456,  207,  486,  364,  395,  333,
  426,  239,  487,  302,  457,  396,  271,  488,  365,  427,  334,  458,  303,
  489,  397,  428,  366,  459,  335,  490,  429,  398,  460,  367,  491,  430,
  461,  399,  492,  462,  431,  493,  463,  494,  495,  16,   512,  48,   513,
  80,   514,  112,  515,  144,  516,  176,  517,  17,   544,  49,   545,  208,
  518,  81,   546,  113,  547,  145,  240,  519,  548,  177,  549,  272,  520,
  18,   576,  50,   209,  550,  577,  82,   578,  114,  579,  304,  521,  241,
  551,  146,  580,  178,  581,  273,  552,  336,  522,  210,  582,  19,   608,
  51,   609,  83,   610,  115,  305,  553,  611,  242,  583,  147,  368,  523,
  612,  179,  613,  274,  584,  337,  554,  211,  614,  20,   400,  524,  640,
  52,   641,  84,   642,  306,  585,  116,  643,  243,  369,  555,  615,  148,
  644,  338,  586,  180,  275,  432,  525,  616,  645,  401,  556,  212,  646,
  21,   672,  53,   307,  617,  673,  85,   370,  587,  674,  244,  647,  117,
  675,  464,  526,  149,  676,  433,  557,  339,  618,  276,  648,  181,  677,
  402,  588,  213,  678,  308,  496,  527,  649,  371,  619,  22,   704,  54,
  465,  558,  705,  86,   706,  245,  679,  118,  434,  589,  707,  150,  340,
  650,  708,  277,  403,  620,  680,  182,  709,  528,  497,  559,  214,  466,
  590,  710,  372,  651,  309,  681,  23,   736,  55,   435,  621,  737,  87,
  246,  711,  738,  119,  739,  341,  682,  404,  652,  151,  529,  560,  740,
  278,  712,  498,  591,  183,  741,  467,  622,  373,  683,  215,  310,  713,
  742,  436,  653,  24,   768,  56,   769,  247,  561,  743,  88,   530,  592,
  770,  342,  714,  120,  405,  684,  771,  499,  623,  152,  772,  279,  744,
  468,  654,  184,  773,  374,  715,  311,  437,  685,  745,  216,  774,  562,
  593,  531,  624,  25,   248,  500,  655,  775,  800,  57,   801,  406,  716,
  89,   343,  746,  802,  121,  803,  469,  686,  280,  776,  153,  804,  594,
  185,  375,  563,  625,  747,  805,  438,  717,  532,  656,  312,  777,  217,
  806,  501,  687,  407,  748,  249,  807,  26,   344,  778,  832,  58,   833,
  90,   470,  718,  834,  122,  595,  626,  835,  281,  564,  657,  808,  154,
  836,  376,  533,  688,  779,  439,  749,  186,  837,  313,  809,  502,  719,
  218,  838,  408,  780,  627,  596,  658,  250,  345,  471,  750,  810,  839,
  27,   864,  59,   565,  689,  865,  91,   866,  123,  867,  282,  534,  720,
  840,  155,  440,  781,  868,  377,  811,  187,  503,  751,  869,  314,  841,
  628,  659,  219,  597,  690,  870,  409,  812,  472,  782,  566,  721,  346,
  842,  251,  871,  28,   896,  60,   535,  752,  897,  92,   898,  124,  283,
  872,  899,  441,  813,  378,  843,  156,  660,  900,  504,  783,  629,  691,
  598,  722,  188,  901,  315,  873,  567,  753,  220,  410,  844,  902,  473,
  814,  347,  874,  536,  784,  252,  903,  29,   661,  692,  928,  61,   929,
  93,   442,  630,  723,  845,  930,  284,  904,  125,  379,  505,  815,  875,
  931,  599,  754,  157,  932,  316,  568,  785,  905,  189,  933,  474,  846,
  411,  876,  221,  934,  537,  816,  693,  348,  662,  724,  906,  253,  631,
  755,  935,  443,  877,  30,   600,  786,  960,  62,   506,  847,  961,  94,
  962,  285,  380,  907,  936,  126,  963,  569,  817,  158,  964,  317,  937,
  190,  475,  694,  725,  878,  965,  412,  908,  663,  756,  538,  848,  222,
  966,  632,  787,  349,  938,  254,  601,  818,  967,  444,  909,  507,  879,
  31,   992,  63,   381,  939,  993,  286,  968,  95,   570,  849,  994,  726,
  127,  695,  757,  995,  664,  788,  159,  996,  476,  910,  318,  969,  413,
  539,  880,  940,  191,  633,  819,  997,  223,  998,  350,  602,  850,  970,
  508,  911,  255,  445,  941,  999,  727,  758,  696,  789,  571,  881,  382,
  971,  287,  665,  820,  1000, 477,  634,  851,  942,  540,  912,  319,  1001,
  414,  972,  603,  882,  759,  728,  790,  351,  1002, 509,  697,  821,  943,
  446,  973,  572,  913,  666,  852,  383,  1003, 635,  883,  478,  974,  541,
  944,  415,  760,  791,  1004, 604,  914,  729,  822,  698,  853,  510,  975,
  667,  884,  447,  573,  945,  1005, 636,  915,  792,  761,  823,  542,  976,
  479,  1006, 730,  854,  605,  946,  699,  885,  668,  916,  511,  1007, 574,
  977,  793,  824,  637,  947,  762,  855,  731,  886,  543,  1008, 606,  978,
  700,  917,  669,  948,  575,  825,  1009, 794,  856,  763,  887,  638,  979,
  732,  918,  701,  949,  607,  1010, 670,  980,  826,  857,  795,  888,  764,
  919,  639,  1011, 733,  950,  702,  981,  858,  827,  889,  796,  920,  671,
  1012, 765,  951,  734,  982,  703,  1013, 859,  890,  828,  921,  797,  952,
  766,  983,  735,  1014, 891,  860,  922,  829,  953,  798,  984,  767,  1015,
  892,  923,  861,  954,  830,  985,  799,  1016, 924,  893,  955,  862,  986,
  831,  1017, 925,  956,  894,  987,  863,  1018, 957,  926,  988,  895,  1019,
  958,  989,  927,  1020, 990,  959,  1021, 991,  1022, 1023,
};
#endif  // CONFIG_EXT_TX

// Neighborhood 2-tuples for various scans and blocksizes,
// in {top, left} order for each position in corresponding scan order.
DECLARE_ALIGNED(16, static const int16_t,
                default_scan_4x4_neighbors[17 * MAX_NEIGHBORS]) = {
  0, 0, 0, 0, 4,  0, 1, 4, 4, 5,  5,  1, 8,  8,  5,  8, 2,
  2, 2, 5, 9, 12, 6, 9, 3, 6, 10, 13, 7, 10, 11, 14, 0, 0,
};

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t,
                mcol_scan_4x4_neighbors[17 * MAX_NEIGHBORS]) = {
  0, 0, 0, 0, 4, 4,  8,  8, 0, 0, 1, 4, 5,  8,  9,  12, 1,
  1, 2, 5, 6, 9, 10, 13, 2, 2, 3, 6, 7, 10, 11, 14, 0,  0,
};

DECLARE_ALIGNED(16, static const int16_t,
                mrow_scan_4x4_neighbors[17 * MAX_NEIGHBORS]) = {
  0, 0, 0, 0, 1, 1, 2,  2, 0, 0, 1,  4,  2,  5,  3,  6, 4,
  4, 5, 8, 6, 9, 7, 10, 8, 8, 9, 12, 10, 13, 11, 14, 0, 0,
};
#endif  // CONFIG_EXT_TX

DECLARE_ALIGNED(16, static const int16_t,
                col_scan_4x4_neighbors[17 * MAX_NEIGHBORS]) = {
  0,  0, 0, 0, 4, 4, 4, 0, 8, 8,  1,  4, 5,  8,  5,  1, 9,
  12, 2, 5, 6, 9, 6, 2, 3, 6, 10, 13, 7, 10, 11, 14, 0, 0,
};

DECLARE_ALIGNED(16, static const int16_t,
                row_scan_4x4_neighbors[17 * MAX_NEIGHBORS]) = {
  0, 0, 0, 0, 0, 1, 1, 1, 1,  4, 2,  2,  2,  5,  4,  5, 5,
  8, 3, 6, 8, 9, 6, 9, 9, 12, 7, 10, 10, 13, 11, 14, 0, 0,
};

DECLARE_ALIGNED(16, static const int16_t,
                default_scan_4x8_neighbors[33 * MAX_NEIGHBORS]) = {
  0,  0,  0,  0,  0,  0,  1,  4,  1,  1,  4,  4,  2,  5,  5,  8,  6,
  9,  2,  2,  8,  8,  3,  6,  9,  12, 7,  10, 10, 13, 12, 12, 13, 16,
  11, 14, 14, 17, 15, 18, 16, 16, 17, 20, 18, 21, 19, 22, 20, 20, 21,
  24, 22, 25, 23, 26, 24, 24, 25, 28, 26, 29, 27, 30, 0,  0
};

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t,
                mcol_scan_4x8_neighbors[33 * MAX_NEIGHBORS]) = {
  0, 0, 0,  0,  4,  4,  8,  8,  12, 12, 16, 16, 20, 20, 24, 24, 0,
  0, 1, 4,  5,  8,  9,  12, 13, 16, 17, 20, 21, 24, 25, 28, 1,  1,
  2, 5, 6,  9,  10, 13, 14, 17, 18, 21, 22, 25, 26, 29, 2,  2,  3,
  6, 7, 10, 11, 14, 15, 18, 19, 22, 23, 26, 27, 30, 0,  0
};

DECLARE_ALIGNED(16, static const int16_t,
                mrow_scan_4x8_neighbors[33 * MAX_NEIGHBORS]) = {
  0,  0,  0,  0,  1,  1,  2,  2,  0,  0,  1,  4,  2,  5,  3,  6,  4,
  4,  5,  8,  6,  9,  7,  10, 8,  8,  9,  12, 10, 13, 11, 14, 12, 12,
  13, 16, 14, 17, 15, 18, 16, 16, 17, 20, 18, 21, 19, 22, 20, 20, 21,
  24, 22, 25, 23, 26, 24, 24, 25, 28, 26, 29, 27, 30, 0,  0
};
#endif

DECLARE_ALIGNED(16, static const int16_t,
                default_scan_8x4_neighbors[33 * MAX_NEIGHBORS]) = {
  0,  0,  0,  0,  0,  0, 1,  8,  1,  1,  8,  8,  2,  9,  9, 16, 10,
  17, 2,  2,  16, 16, 3, 10, 17, 24, 11, 18, 18, 25, 3,  3, 4,  11,
  19, 26, 12, 19, 4,  4, 20, 27, 5,  12, 13, 20, 21, 28, 5, 5,  6,
  13, 14, 21, 22, 29, 6, 6,  7,  14, 15, 22, 23, 30, 0,  0
};

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t,
                mcol_scan_8x4_neighbors[33 * MAX_NEIGHBORS]) = {
  0,  0,  0,  0,  8,  8,  16, 16, 0,  0,  1,  8,  9,  16, 17, 24, 1,
  1,  2,  9,  10, 17, 18, 25, 2,  2,  3,  10, 11, 18, 19, 26, 3,  3,
  4,  11, 12, 19, 20, 27, 4,  4,  5,  12, 13, 20, 21, 28, 5,  5,  6,
  13, 14, 21, 22, 29, 6,  6,  7,  14, 15, 22, 23, 30, 0,  0
};

DECLARE_ALIGNED(16, static const int16_t,
                mrow_scan_8x4_neighbors[33 * MAX_NEIGHBORS]) = {
  0,  0,  0,  0,  1,  1,  2,  2,  3,  3,  4,  4,  5,  5,  6,  6,  0,
  0,  1,  8,  2,  9,  3,  10, 4,  11, 5,  12, 6,  13, 7,  14, 8,  8,
  9,  16, 10, 17, 11, 18, 12, 19, 13, 20, 14, 21, 15, 22, 16, 16, 17,
  24, 18, 25, 19, 26, 20, 27, 21, 28, 22, 29, 23, 30, 0,  0
};
#endif  // CONFIG_EXT_TX

DECLARE_ALIGNED(16, static const int16_t,
                col_scan_8x8_neighbors[65 * MAX_NEIGHBORS]) = {
  0,  0,  0,  0,  8,  8,  8,  0,  16, 16, 1,  8,  24, 24, 9,  16, 9,  1,  32,
  32, 17, 24, 2,  9,  25, 32, 10, 17, 40, 40, 10, 2,  18, 25, 33, 40, 3,  10,
  48, 48, 11, 18, 26, 33, 11, 3,  41, 48, 19, 26, 34, 41, 4,  11, 27, 34, 12,
  19, 49, 56, 42, 49, 20, 27, 12, 4,  35, 42, 5,  12, 28, 35, 50, 57, 43, 50,
  13, 20, 36, 43, 13, 5,  21, 28, 51, 58, 29, 36, 6,  13, 44, 51, 14, 21, 14,
  6,  37, 44, 52, 59, 22, 29, 7,  14, 30, 37, 45, 52, 15, 22, 38, 45, 23, 30,
  53, 60, 31, 38, 46, 53, 39, 46, 54, 61, 47, 54, 55, 62, 0,  0,
};

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t,
                mcol_scan_8x8_neighbors[65 * MAX_NEIGHBORS]) = {
  0,  0,  0,  0,  8,  8,  16, 16, 24, 24, 32, 32, 40, 40, 48, 48, 0,  0,  1,
  8,  9,  16, 17, 24, 25, 32, 33, 40, 41, 48, 49, 56, 1,  1,  2,  9,  10, 17,
  18, 25, 26, 33, 34, 41, 42, 49, 50, 57, 2,  2,  3,  10, 11, 18, 19, 26, 27,
  34, 35, 42, 43, 50, 51, 58, 3,  3,  4,  11, 12, 19, 20, 27, 28, 35, 36, 43,
  44, 51, 52, 59, 4,  4,  5,  12, 13, 20, 21, 28, 29, 36, 37, 44, 45, 52, 53,
  60, 5,  5,  6,  13, 14, 21, 22, 29, 30, 37, 38, 45, 46, 53, 54, 61, 6,  6,
  7,  14, 15, 22, 23, 30, 31, 38, 39, 46, 47, 54, 55, 62, 0,  0,
};

DECLARE_ALIGNED(16, static const int16_t,
                mrow_scan_8x8_neighbors[65 * MAX_NEIGHBORS]) = {
  0,  0,  0,  0,  1,  1,  2,  2,  3,  3,  4,  4,  5,  5,  6,  6,  0,  0,  1,
  8,  2,  9,  3,  10, 4,  11, 5,  12, 6,  13, 7,  14, 8,  8,  9,  16, 10, 17,
  11, 18, 12, 19, 13, 20, 14, 21, 15, 22, 16, 16, 17, 24, 18, 25, 19, 26, 20,
  27, 21, 28, 22, 29, 23, 30, 24, 24, 25, 32, 26, 33, 27, 34, 28, 35, 29, 36,
  30, 37, 31, 38, 32, 32, 33, 40, 34, 41, 35, 42, 36, 43, 37, 44, 38, 45, 39,
  46, 40, 40, 41, 48, 42, 49, 43, 50, 44, 51, 45, 52, 46, 53, 47, 54, 48, 48,
  49, 56, 50, 57, 51, 58, 52, 59, 53, 60, 54, 61, 55, 62, 0,  0,
};
#endif  // CONFIG_EXT_TX

DECLARE_ALIGNED(16, static const int16_t,
                row_scan_8x8_neighbors[65 * MAX_NEIGHBORS]) = {
  0,  0,  0,  0,  1,  1,  0,  1,  1,  8,  2,  2,  8,  9,  2,  9,  3,  3,  9,
  16, 3,  10, 16, 17, 4,  4,  10, 17, 17, 24, 4,  11, 11, 18, 18, 25, 24, 25,
  5,  5,  5,  12, 12, 19, 25, 32, 19, 26, 6,  6,  26, 33, 32, 33, 13, 20, 20,
  27, 33, 40, 6,  13, 27, 34, 40, 41, 34, 41, 21, 28, 28, 35, 41, 48, 14, 21,
  35, 42, 7,  14, 48, 49, 29, 36, 42, 49, 36, 43, 22, 29, 49, 56, 15, 22, 43,
  50, 50, 57, 37, 44, 30, 37, 44, 51, 23, 30, 51, 58, 45, 52, 38, 45, 52, 59,
  31, 38, 53, 60, 39, 46, 46, 53, 47, 54, 54, 61, 55, 62, 0,  0,
};

DECLARE_ALIGNED(16, static const int16_t,
                default_scan_8x8_neighbors[65 * MAX_NEIGHBORS]) = {
  0,  0,  0,  0,  8,  0,  8,  8,  1,  8,  9,  1,  9,  16, 16, 17, 2,  9,  10,
  2,  10, 17, 17, 24, 24, 25, 3,  10, 11, 3,  18, 25, 25, 32, 11, 18, 32, 33,
  4,  11, 26, 33, 19, 26, 12, 4,  33, 40, 12, 19, 40, 41, 5,  12, 27, 34, 34,
  41, 20, 27, 13, 20, 13, 5,  41, 48, 48, 49, 28, 35, 35, 42, 21, 28, 6,  6,
  6,  13, 42, 49, 49, 56, 36, 43, 14, 21, 29, 36, 7,  14, 43, 50, 50, 57, 22,
  29, 37, 44, 15, 22, 44, 51, 51, 58, 30, 37, 23, 30, 52, 59, 45, 52, 38, 45,
  31, 38, 53, 60, 46, 53, 39, 46, 54, 61, 47, 54, 55, 62, 0,  0,
};

DECLARE_ALIGNED(16, static const int16_t,
                default_scan_8x16_neighbors[129 * MAX_NEIGHBORS]) = {
  0,   0,   0,   0,   0,   0,   1,   1,   1,   8,   8,   8,   2,   2,   2,
  9,   9,   16,  16,  16,  3,   3,   3,   10,  10,  17,  17,  24,  24,  24,
  4,   4,   4,   11,  11,  18,  18,  25,  25,  32,  32,  32,  5,   5,   5,
  12,  12,  19,  19,  26,  26,  33,  33,  40,  40,  40,  6,   6,   6,   13,
  13,  20,  20,  27,  27,  34,  34,  41,  41,  48,  48,  48,  7,   14,  14,
  21,  21,  28,  28,  35,  35,  42,  42,  49,  49,  56,  56,  56,  15,  22,
  22,  29,  29,  36,  36,  43,  43,  50,  50,  57,  57,  64,  64,  64,  23,
  30,  30,  37,  37,  44,  44,  51,  51,  58,  58,  65,  65,  72,  72,  72,
  31,  38,  38,  45,  45,  52,  52,  59,  59,  66,  66,  73,  73,  80,  80,
  80,  39,  46,  46,  53,  53,  60,  60,  67,  67,  74,  74,  81,  81,  88,
  88,  88,  47,  54,  54,  61,  61,  68,  68,  75,  75,  82,  82,  89,  89,
  96,  96,  96,  55,  62,  62,  69,  69,  76,  76,  83,  83,  90,  90,  97,
  97,  104, 104, 104, 63,  70,  70,  77,  77,  84,  84,  91,  91,  98,  98,
  105, 105, 112, 112, 112, 71,  78,  78,  85,  85,  92,  92,  99,  99,  106,
  106, 113, 113, 120, 79,  86,  86,  93,  93,  100, 100, 107, 107, 114, 114,
  121, 87,  94,  94,  101, 101, 108, 108, 115, 115, 122, 95,  102, 102, 109,
  109, 116, 116, 123, 103, 110, 110, 117, 117, 124, 111, 118, 118, 125, 119,
  126, 0,   0
};

DECLARE_ALIGNED(16, static const int16_t,
                default_scan_16x8_neighbors[129 * MAX_NEIGHBORS]) = {
  0,   0,   0,   0,   0,   0,  1,  1,   1,   16,  16,  16,  2,   2,   2,
  17,  17,  32,  32,  32,  3,  3,  3,   18,  18,  33,  33,  48,  48,  48,
  4,   4,   4,   19,  19,  34, 34, 49,  49,  64,  64,  64,  5,   5,   5,
  20,  20,  35,  35,  50,  50, 65, 65,  80,  80,  80,  6,   6,   6,   21,
  21,  36,  36,  51,  51,  66, 66, 81,  81,  96,  96,  96,  7,   7,   7,
  22,  22,  37,  37,  52,  52, 67, 67,  82,  82,  97,  97,  112, 8,   8,
  8,   23,  23,  38,  38,  53, 53, 68,  68,  83,  83,  98,  98,  113, 9,
  9,   9,   24,  24,  39,  39, 54, 54,  69,  69,  84,  84,  99,  99,  114,
  10,  10,  10,  25,  25,  40, 40, 55,  55,  70,  70,  85,  85,  100, 100,
  115, 11,  11,  11,  26,  26, 41, 41,  56,  56,  71,  71,  86,  86,  101,
  101, 116, 12,  12,  12,  27, 27, 42,  42,  57,  57,  72,  72,  87,  87,
  102, 102, 117, 13,  13,  13, 28, 28,  43,  43,  58,  58,  73,  73,  88,
  88,  103, 103, 118, 14,  14, 14, 29,  29,  44,  44,  59,  59,  74,  74,
  89,  89,  104, 104, 119, 15, 30, 30,  45,  45,  60,  60,  75,  75,  90,
  90,  105, 105, 120, 31,  46, 46, 61,  61,  76,  76,  91,  91,  106, 106,
  121, 47,  62,  62,  77,  77, 92, 92,  107, 107, 122, 63,  78,  78,  93,
  93,  108, 108, 123, 79,  94, 94, 109, 109, 124, 95,  110, 110, 125, 111,
  126, 0,   0
};

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t,
                mcol_scan_8x16_neighbors[129 * MAX_NEIGHBORS]) = {
  0,  0,  0,  0,  8,  8,  16, 16, 24, 24,  32,  32,  40,  40,  48,  48,
  56, 56, 64, 64, 72, 72, 80, 80, 88, 88,  96,  96,  104, 104, 112, 112,
  0,  0,  1,  8,  9,  16, 17, 24, 25, 32,  33,  40,  41,  48,  49,  56,
  57, 64, 65, 72, 73, 80, 81, 88, 89, 96,  97,  104, 105, 112, 113, 120,
  1,  1,  2,  9,  10, 17, 18, 25, 26, 33,  34,  41,  42,  49,  50,  57,
  58, 65, 66, 73, 74, 81, 82, 89, 90, 97,  98,  105, 106, 113, 114, 121,
  2,  2,  3,  10, 11, 18, 19, 26, 27, 34,  35,  42,  43,  50,  51,  58,
  59, 66, 67, 74, 75, 82, 83, 90, 91, 98,  99,  106, 107, 114, 115, 122,
  3,  3,  4,  11, 12, 19, 20, 27, 28, 35,  36,  43,  44,  51,  52,  59,
  60, 67, 68, 75, 76, 83, 84, 91, 92, 99,  100, 107, 108, 115, 116, 123,
  4,  4,  5,  12, 13, 20, 21, 28, 29, 36,  37,  44,  45,  52,  53,  60,
  61, 68, 69, 76, 77, 84, 85, 92, 93, 100, 101, 108, 109, 116, 117, 124,
  5,  5,  6,  13, 14, 21, 22, 29, 30, 37,  38,  45,  46,  53,  54,  61,
  62, 69, 70, 77, 78, 85, 86, 93, 94, 101, 102, 109, 110, 117, 118, 125,
  6,  6,  7,  14, 15, 22, 23, 30, 31, 38,  39,  46,  47,  54,  55,  62,
  63, 70, 71, 78, 79, 86, 87, 94, 95, 102, 103, 110, 111, 118, 119, 126,
  0,  0
};

DECLARE_ALIGNED(16, static const int16_t,
                mcol_scan_16x8_neighbors[129 * MAX_NEIGHBORS]) = {
  0,  0,  0,  0,  16, 16, 32, 32, 48, 48, 64, 64, 80, 80,  96,  96,
  0,  0,  1,  16, 17, 32, 33, 48, 49, 64, 65, 80, 81, 96,  97,  112,
  1,  1,  2,  17, 18, 33, 34, 49, 50, 65, 66, 81, 82, 97,  98,  113,
  2,  2,  3,  18, 19, 34, 35, 50, 51, 66, 67, 82, 83, 98,  99,  114,
  3,  3,  4,  19, 20, 35, 36, 51, 52, 67, 68, 83, 84, 99,  100, 115,
  4,  4,  5,  20, 21, 36, 37, 52, 53, 68, 69, 84, 85, 100, 101, 116,
  5,  5,  6,  21, 22, 37, 38, 53, 54, 69, 70, 85, 86, 101, 102, 117,
  6,  6,  7,  22, 23, 38, 39, 54, 55, 70, 71, 86, 87, 102, 103, 118,
  7,  7,  8,  23, 24, 39, 40, 55, 56, 71, 72, 87, 88, 103, 104, 119,
  8,  8,  9,  24, 25, 40, 41, 56, 57, 72, 73, 88, 89, 104, 105, 120,
  9,  9,  10, 25, 26, 41, 42, 57, 58, 73, 74, 89, 90, 105, 106, 121,
  10, 10, 11, 26, 27, 42, 43, 58, 59, 74, 75, 90, 91, 106, 107, 122,
  11, 11, 12, 27, 28, 43, 44, 59, 60, 75, 76, 91, 92, 107, 108, 123,
  12, 12, 13, 28, 29, 44, 45, 60, 61, 76, 77, 92, 93, 108, 109, 124,
  13, 13, 14, 29, 30, 45, 46, 61, 62, 77, 78, 93, 94, 109, 110, 125,
  14, 14, 15, 30, 31, 46, 47, 62, 63, 78, 79, 94, 95, 110, 111, 126,
  0,  0
};

DECLARE_ALIGNED(16, static const int16_t,
                mrow_scan_8x16_neighbors[129 * MAX_NEIGHBORS]) = {
  0,   0,   0,   0,   1,   1,   2,   2,   3,   3,   4,   4,   5,   5,   6,
  6,   0,   0,   1,   8,   2,   9,   3,   10,  4,   11,  5,   12,  6,   13,
  7,   14,  8,   8,   9,   16,  10,  17,  11,  18,  12,  19,  13,  20,  14,
  21,  15,  22,  16,  16,  17,  24,  18,  25,  19,  26,  20,  27,  21,  28,
  22,  29,  23,  30,  24,  24,  25,  32,  26,  33,  27,  34,  28,  35,  29,
  36,  30,  37,  31,  38,  32,  32,  33,  40,  34,  41,  35,  42,  36,  43,
  37,  44,  38,  45,  39,  46,  40,  40,  41,  48,  42,  49,  43,  50,  44,
  51,  45,  52,  46,  53,  47,  54,  48,  48,  49,  56,  50,  57,  51,  58,
  52,  59,  53,  60,  54,  61,  55,  62,  56,  56,  57,  64,  58,  65,  59,
  66,  60,  67,  61,  68,  62,  69,  63,  70,  64,  64,  65,  72,  66,  73,
  67,  74,  68,  75,  69,  76,  70,  77,  71,  78,  72,  72,  73,  80,  74,
  81,  75,  82,  76,  83,  77,  84,  78,  85,  79,  86,  80,  80,  81,  88,
  82,  89,  83,  90,  84,  91,  85,  92,  86,  93,  87,  94,  88,  88,  89,
  96,  90,  97,  91,  98,  92,  99,  93,  100, 94,  101, 95,  102, 96,  96,
  97,  104, 98,  105, 99,  106, 100, 107, 101, 108, 102, 109, 103, 110, 104,
  104, 105, 112, 106, 113, 107, 114, 108, 115, 109, 116, 110, 117, 111, 118,
  112, 112, 113, 120, 114, 121, 115, 122, 116, 123, 117, 124, 118, 125, 119,
  126, 0,   0
};

DECLARE_ALIGNED(16, static const int16_t,
                mrow_scan_16x8_neighbors[129 * MAX_NEIGHBORS]) = {
  0,   0,   0,   0,   1,   1,   2,   2,   3,   3,   4,   4,   5,   5,   6,
  6,   7,   7,   8,   8,   9,   9,   10,  10,  11,  11,  12,  12,  13,  13,
  14,  14,  0,   0,   1,   16,  2,   17,  3,   18,  4,   19,  5,   20,  6,
  21,  7,   22,  8,   23,  9,   24,  10,  25,  11,  26,  12,  27,  13,  28,
  14,  29,  15,  30,  16,  16,  17,  32,  18,  33,  19,  34,  20,  35,  21,
  36,  22,  37,  23,  38,  24,  39,  25,  40,  26,  41,  27,  42,  28,  43,
  29,  44,  30,  45,  31,  46,  32,  32,  33,  48,  34,  49,  35,  50,  36,
  51,  37,  52,  38,  53,  39,  54,  40,  55,  41,  56,  42,  57,  43,  58,
  44,  59,  45,  60,  46,  61,  47,  62,  48,  48,  49,  64,  50,  65,  51,
  66,  52,  67,  53,  68,  54,  69,  55,  70,  56,  71,  57,  72,  58,  73,
  59,  74,  60,  75,  61,  76,  62,  77,  63,  78,  64,  64,  65,  80,  66,
  81,  67,  82,  68,  83,  69,  84,  70,  85,  71,  86,  72,  87,  73,  88,
  74,  89,  75,  90,  76,  91,  77,  92,  78,  93,  79,  94,  80,  80,  81,
  96,  82,  97,  83,  98,  84,  99,  85,  100, 86,  101, 87,  102, 88,  103,
  89,  104, 90,  105, 91,  106, 92,  107, 93,  108, 94,  109, 95,  110, 96,
  96,  97,  112, 98,  113, 99,  114, 100, 115, 101, 116, 102, 117, 103, 118,
  104, 119, 105, 120, 106, 121, 107, 122, 108, 123, 109, 124, 110, 125, 111,
  126, 0,   0
};
#endif

DECLARE_ALIGNED(16, static const int16_t,
                default_scan_16x32_neighbors[513 * MAX_NEIGHBORS]) = {
  0,   0,   0,   0,   0,   0,   1,   1,   1,   16,  16,  16,  2,   2,   2,
  17,  17,  32,  32,  32,  3,   3,   3,   18,  18,  33,  33,  48,  48,  48,
  4,   4,   4,   19,  19,  34,  34,  49,  49,  64,  64,  64,  5,   5,   5,
  20,  20,  35,  35,  50,  50,  65,  65,  80,  80,  80,  6,   6,   6,   21,
  21,  36,  36,  51,  51,  66,  66,  81,  81,  96,  96,  96,  7,   7,   7,
  22,  22,  37,  37,  52,  52,  67,  67,  82,  82,  97,  97,  112, 112, 112,
  8,   8,   8,   23,  23,  38,  38,  53,  53,  68,  68,  83,  83,  98,  98,
  113, 113, 128, 128, 128, 9,   9,   9,   24,  24,  39,  39,  54,  54,  69,
  69,  84,  84,  99,  99,  114, 114, 129, 129, 144, 144, 144, 10,  10,  10,
  25,  25,  40,  40,  55,  55,  70,  70,  85,  85,  100, 100, 115, 115, 130,
  130, 145, 145, 160, 160, 160, 11,  11,  11,  26,  26,  41,  41,  56,  56,
  71,  71,  86,  86,  101, 101, 116, 116, 131, 131, 146, 146, 161, 161, 176,
  176, 176, 12,  12,  12,  27,  27,  42,  42,  57,  57,  72,  72,  87,  87,
  102, 102, 117, 117, 132, 132, 147, 147, 162, 162, 177, 177, 192, 192, 192,
  13,  13,  13,  28,  28,  43,  43,  58,  58,  73,  73,  88,  88,  103, 103,
  118, 118, 133, 133, 148, 148, 163, 163, 178, 178, 193, 193, 208, 208, 208,
  14,  14,  14,  29,  29,  44,  44,  59,  59,  74,  74,  89,  89,  104, 104,
  119, 119, 134, 134, 149, 149, 164, 164, 179, 179, 194, 194, 209, 209, 224,
  224, 224, 15,  30,  30,  45,  45,  60,  60,  75,  75,  90,  90,  105, 105,
  120, 120, 135, 135, 150, 150, 165, 165, 180, 180, 195, 195, 210, 210, 225,
  225, 240, 240, 240, 31,  46,  46,  61,  61,  76,  76,  91,  91,  106, 106,
  121, 121, 136, 136, 151, 151, 166, 166, 181, 181, 196, 196, 211, 211, 226,
  226, 241, 241, 256, 256, 256, 47,  62,  62,  77,  77,  92,  92,  107, 107,
  122, 122, 137, 137, 152, 152, 167, 167, 182, 182, 197, 197, 212, 212, 227,
  227, 242, 242, 257, 257, 272, 272, 272, 63,  78,  78,  93,  93,  108, 108,
  123, 123, 138, 138, 153, 153, 168, 168, 183, 183, 198, 198, 213, 213, 228,
  228, 243, 243, 258, 258, 273, 273, 288, 288, 288, 79,  94,  94,  109, 109,
  124, 124, 139, 139, 154, 154, 169, 169, 184, 184, 199, 199, 214, 214, 229,
  229, 244, 244, 259, 259, 274, 274, 289, 289, 304, 304, 304, 95,  110, 110,
  125, 125, 140, 140, 155, 155, 170, 170, 185, 185, 200, 200, 215, 215, 230,
  230, 245, 245, 260, 260, 275, 275, 290, 290, 305, 305, 320, 320, 320, 111,
  126, 126, 141, 141, 156, 156, 171, 171, 186, 186, 201, 201, 216, 216, 231,
  231, 246, 246, 261, 261, 276, 276, 291, 291, 306, 306, 321, 321, 336, 336,
  336, 127, 142, 142, 157, 157, 172, 172, 187, 187, 202, 202, 217, 217, 232,
  232, 247, 247, 262, 262, 277, 277, 292, 292, 307, 307, 322, 322, 337, 337,
  352, 352, 352, 143, 158, 158, 173, 173, 188, 188, 203, 203, 218, 218, 233,
  233, 248, 248, 263, 263, 278, 278, 293, 293, 308, 308, 323, 323, 338, 338,
  353, 353, 368, 368, 368, 159, 174, 174, 189, 189, 204, 204, 219, 219, 234,
  234, 249, 249, 264, 264, 279, 279, 294, 294, 309, 309, 324, 324, 339, 339,
  354, 354, 369, 369, 384, 384, 384, 175, 190, 190, 205, 205, 220, 220, 235,
  235, 250, 250, 265, 265, 280, 280, 295, 295, 310, 310, 325, 325, 340, 340,
  355, 355, 370, 370, 385, 385, 400, 400, 400, 191, 206, 206, 221, 221, 236,
  236, 251, 251, 266, 266, 281, 281, 296, 296, 311, 311, 326, 326, 341, 341,
  356, 356, 371, 371, 386, 386, 401, 401, 416, 416, 416, 207, 222, 222, 237,
  237, 252, 252, 267, 267, 282, 282, 297, 297, 312, 312, 327, 327, 342, 342,
  357, 357, 372, 372, 387, 387, 402, 402, 417, 417, 432, 432, 432, 223, 238,
  238, 253, 253, 268, 268, 283, 283, 298, 298, 313, 313, 328, 328, 343, 343,
  358, 358, 373, 373, 388, 388, 403, 403, 418, 418, 433, 433, 448, 448, 448,
  239, 254, 254, 269, 269, 284, 284, 299, 299, 314, 314, 329, 329, 344, 344,
  359, 359, 374, 374, 389, 389, 404, 404, 419, 419, 434, 434, 449, 449, 464,
  464, 464, 255, 270, 270, 285, 285, 300, 300, 315, 315, 330, 330, 345, 345,
  360, 360, 375, 375, 390, 390, 405, 405, 420, 420, 435, 435, 450, 450, 465,
  465, 480, 480, 480, 271, 286, 286, 301, 301, 316, 316, 331, 331, 346, 346,
  361, 361, 376, 376, 391, 391, 406, 406, 421, 421, 436, 436, 451, 451, 466,
  466, 481, 481, 496, 287, 302, 302, 317, 317, 332, 332, 347, 347, 362, 362,
  377, 377, 392, 392, 407, 407, 422, 422, 437, 437, 452, 452, 467, 467, 482,
  482, 497, 303, 318, 318, 333, 333, 348, 348, 363, 363, 378, 378, 393, 393,
  408, 408, 423, 423, 438, 438, 453, 453, 468, 468, 483, 483, 498, 319, 334,
  334, 349, 349, 364, 364, 379, 379, 394, 394, 409, 409, 424, 424, 439, 439,
  454, 454, 469, 469, 484, 484, 499, 335, 350, 350, 365, 365, 380, 380, 395,
  395, 410, 410, 425, 425, 440, 440, 455, 455, 470, 470, 485, 485, 500, 351,
  366, 366, 381, 381, 396, 396, 411, 411, 426, 426, 441, 441, 456, 456, 471,
  471, 486, 486, 501, 367, 382, 382, 397, 397, 412, 412, 427, 427, 442, 442,
  457, 457, 472, 472, 487, 487, 502, 383, 398, 398, 413, 413, 428, 428, 443,
  443, 458, 458, 473, 473, 488, 488, 503, 399, 414, 414, 429, 429, 444, 444,
  459, 459, 474, 474, 489, 489, 504, 415, 430, 430, 445, 445, 460, 460, 475,
  475, 490, 490, 505, 431, 446, 446, 461, 461, 476, 476, 491, 491, 506, 447,
  462, 462, 477, 477, 492, 492, 507, 463, 478, 478, 493, 493, 508, 479, 494,
  494, 509, 495, 510, 0,   0
};

DECLARE_ALIGNED(16, static const int16_t,
                default_scan_32x16_neighbors[513 * MAX_NEIGHBORS]) = {
  0,   0,   0,   0,   0,   0,   1,   1,   1,   32,  32,  32,  2,   2,   2,
  33,  33,  64,  64,  64,  3,   3,   3,   34,  34,  65,  65,  96,  96,  96,
  4,   4,   4,   35,  35,  66,  66,  97,  97,  128, 128, 128, 5,   5,   5,
  36,  36,  67,  67,  98,  98,  129, 129, 160, 160, 160, 6,   6,   6,   37,
  37,  68,  68,  99,  99,  130, 130, 161, 161, 192, 192, 192, 7,   7,   7,
  38,  38,  69,  69,  100, 100, 131, 131, 162, 162, 193, 193, 224, 224, 224,
  8,   8,   8,   39,  39,  70,  70,  101, 101, 132, 132, 163, 163, 194, 194,
  225, 225, 256, 256, 256, 9,   9,   9,   40,  40,  71,  71,  102, 102, 133,
  133, 164, 164, 195, 195, 226, 226, 257, 257, 288, 288, 288, 10,  10,  10,
  41,  41,  72,  72,  103, 103, 134, 134, 165, 165, 196, 196, 227, 227, 258,
  258, 289, 289, 320, 320, 320, 11,  11,  11,  42,  42,  73,  73,  104, 104,
  135, 135, 166, 166, 197, 197, 228, 228, 259, 259, 290, 290, 321, 321, 352,
  352, 352, 12,  12,  12,  43,  43,  74,  74,  105, 105, 136, 136, 167, 167,
  198, 198, 229, 229, 260, 260, 291, 291, 322, 322, 353, 353, 384, 384, 384,
  13,  13,  13,  44,  44,  75,  75,  106, 106, 137, 137, 168, 168, 199, 199,
  230, 230, 261, 261, 292, 292, 323, 323, 354, 354, 385, 385, 416, 416, 416,
  14,  14,  14,  45,  45,  76,  76,  107, 107, 138, 138, 169, 169, 200, 200,
  231, 231, 262, 262, 293, 293, 324, 324, 355, 355, 386, 386, 417, 417, 448,
  448, 448, 15,  15,  15,  46,  46,  77,  77,  108, 108, 139, 139, 170, 170,
  201, 201, 232, 232, 263, 263, 294, 294, 325, 325, 356, 356, 387, 387, 418,
  418, 449, 449, 480, 16,  16,  16,  47,  47,  78,  78,  109, 109, 140, 140,
  171, 171, 202, 202, 233, 233, 264, 264, 295, 295, 326, 326, 357, 357, 388,
  388, 419, 419, 450, 450, 481, 17,  17,  17,  48,  48,  79,  79,  110, 110,
  141, 141, 172, 172, 203, 203, 234, 234, 265, 265, 296, 296, 327, 327, 358,
  358, 389, 389, 420, 420, 451, 451, 482, 18,  18,  18,  49,  49,  80,  80,
  111, 111, 142, 142, 173, 173, 204, 204, 235, 235, 266, 266, 297, 297, 328,
  328, 359, 359, 390, 390, 421, 421, 452, 452, 483, 19,  19,  19,  50,  50,
  81,  81,  112, 112, 143, 143, 174, 174, 205, 205, 236, 236, 267, 267, 298,
  298, 329, 329, 360, 360, 391, 391, 422, 422, 453, 453, 484, 20,  20,  20,
  51,  51,  82,  82,  113, 113, 144, 144, 175, 175, 206, 206, 237, 237, 268,
  268, 299, 299, 330, 330, 361, 361, 392, 392, 423, 423, 454, 454, 485, 21,
  21,  21,  52,  52,  83,  83,  114, 114, 145, 145, 176, 176, 207, 207, 238,
  238, 269, 269, 300, 300, 331, 331, 362, 362, 393, 393, 424, 424, 455, 455,
  486, 22,  22,  22,  53,  53,  84,  84,  115, 115, 146, 146, 177, 177, 208,
  208, 239, 239, 270, 270, 301, 301, 332, 332, 363, 363, 394, 394, 425, 425,
  456, 456, 487, 23,  23,  23,  54,  54,  85,  85,  116, 116, 147, 147, 178,
  178, 209, 209, 240, 240, 271, 271, 302, 302, 333, 333, 364, 364, 395, 395,
  426, 426, 457, 457, 488, 24,  24,  24,  55,  55,  86,  86,  117, 117, 148,
  148, 179, 179, 210, 210, 241, 241, 272, 272, 303, 303, 334, 334, 365, 365,
  396, 396, 427, 427, 458, 458, 489, 25,  25,  25,  56,  56,  87,  87,  118,
  118, 149, 149, 180, 180, 211, 211, 242, 242, 273, 273, 304, 304, 335, 335,
  366, 366, 397, 397, 428, 428, 459, 459, 490, 26,  26,  26,  57,  57,  88,
  88,  119, 119, 150, 150, 181, 181, 212, 212, 243, 243, 274, 274, 305, 305,
  336, 336, 367, 367, 398, 398, 429, 429, 460, 460, 491, 27,  27,  27,  58,
  58,  89,  89,  120, 120, 151, 151, 182, 182, 213, 213, 244, 244, 275, 275,
  306, 306, 337, 337, 368, 368, 399, 399, 430, 430, 461, 461, 492, 28,  28,
  28,  59,  59,  90,  90,  121, 121, 152, 152, 183, 183, 214, 214, 245, 245,
  276, 276, 307, 307, 338, 338, 369, 369, 400, 400, 431, 431, 462, 462, 493,
  29,  29,  29,  60,  60,  91,  91,  122, 122, 153, 153, 184, 184, 215, 215,
  246, 246, 277, 277, 308, 308, 339, 339, 370, 370, 401, 401, 432, 432, 463,
  463, 494, 30,  30,  30,  61,  61,  92,  92,  123, 123, 154, 154, 185, 185,
  216, 216, 247, 247, 278, 278, 309, 309, 340, 340, 371, 371, 402, 402, 433,
  433, 464, 464, 495, 31,  62,  62,  93,  93,  124, 124, 155, 155, 186, 186,
  217, 217, 248, 248, 279, 279, 310, 310, 341, 341, 372, 372, 403, 403, 434,
  434, 465, 465, 496, 63,  94,  94,  125, 125, 156, 156, 187, 187, 218, 218,
  249, 249, 280, 280, 311, 311, 342, 342, 373, 373, 404, 404, 435, 435, 466,
  466, 497, 95,  126, 126, 157, 157, 188, 188, 219, 219, 250, 250, 281, 281,
  312, 312, 343, 343, 374, 374, 405, 405, 436, 436, 467, 467, 498, 127, 158,
  158, 189, 189, 220, 220, 251, 251, 282, 282, 313, 313, 344, 344, 375, 375,
  406, 406, 437, 437, 468, 468, 499, 159, 190, 190, 221, 221, 252, 252, 283,
  283, 314, 314, 345, 345, 376, 376, 407, 407, 438, 438, 469, 469, 500, 191,
  222, 222, 253, 253, 284, 284, 315, 315, 346, 346, 377, 377, 408, 408, 439,
  439, 470, 470, 501, 223, 254, 254, 285, 285, 316, 316, 347, 347, 378, 378,
  409, 409, 440, 440, 471, 471, 502, 255, 286, 286, 317, 317, 348, 348, 379,
  379, 410, 410, 441, 441, 472, 472, 503, 287, 318, 318, 349, 349, 380, 380,
  411, 411, 442, 442, 473, 473, 504, 319, 350, 350, 381, 381, 412, 412, 443,
  443, 474, 474, 505, 351, 382, 382, 413, 413, 444, 444, 475, 475, 506, 383,
  414, 414, 445, 445, 476, 476, 507, 415, 446, 446, 477, 477, 508, 447, 478,
  478, 509, 479, 510, 0,   0
};

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t,
                mcol_scan_16x32_neighbors[513 * MAX_NEIGHBORS]) = {
  0,   0,   0,   0,   16,  16,  32,  32,  48,  48,  64,  64,  80,  80,  96,
  96,  112, 112, 128, 128, 144, 144, 160, 160, 176, 176, 192, 192, 208, 208,
  224, 224, 240, 240, 256, 256, 272, 272, 288, 288, 304, 304, 320, 320, 336,
  336, 352, 352, 368, 368, 384, 384, 400, 400, 416, 416, 432, 432, 448, 448,
  464, 464, 480, 480, 0,   0,   1,   16,  17,  32,  33,  48,  49,  64,  65,
  80,  81,  96,  97,  112, 113, 128, 129, 144, 145, 160, 161, 176, 177, 192,
  193, 208, 209, 224, 225, 240, 241, 256, 257, 272, 273, 288, 289, 304, 305,
  320, 321, 336, 337, 352, 353, 368, 369, 384, 385, 400, 401, 416, 417, 432,
  433, 448, 449, 464, 465, 480, 481, 496, 1,   1,   2,   17,  18,  33,  34,
  49,  50,  65,  66,  81,  82,  97,  98,  113, 114, 129, 130, 145, 146, 161,
  162, 177, 178, 193, 194, 209, 210, 225, 226, 241, 242, 257, 258, 273, 274,
  289, 290, 305, 306, 321, 322, 337, 338, 353, 354, 369, 370, 385, 386, 401,
  402, 417, 418, 433, 434, 449, 450, 465, 466, 481, 482, 497, 2,   2,   3,
  18,  19,  34,  35,  50,  51,  66,  67,  82,  83,  98,  99,  114, 115, 130,
  131, 146, 147, 162, 163, 178, 179, 194, 195, 210, 211, 226, 227, 242, 243,
  258, 259, 274, 275, 290, 291, 306, 307, 322, 323, 338, 339, 354, 355, 370,
  371, 386, 387, 402, 403, 418, 419, 434, 435, 450, 451, 466, 467, 482, 483,
  498, 3,   3,   4,   19,  20,  35,  36,  51,  52,  67,  68,  83,  84,  99,
  100, 115, 116, 131, 132, 147, 148, 163, 164, 179, 180, 195, 196, 211, 212,
  227, 228, 243, 244, 259, 260, 275, 276, 291, 292, 307, 308, 323, 324, 339,
  340, 355, 356, 371, 372, 387, 388, 403, 404, 419, 420, 435, 436, 451, 452,
  467, 468, 483, 484, 499, 4,   4,   5,   20,  21,  36,  37,  52,  53,  68,
  69,  84,  85,  100, 101, 116, 117, 132, 133, 148, 149, 164, 165, 180, 181,
  196, 197, 212, 213, 228, 229, 244, 245, 260, 261, 276, 277, 292, 293, 308,
  309, 324, 325, 340, 341, 356, 357, 372, 373, 388, 389, 404, 405, 420, 421,
  436, 437, 452, 453, 468, 469, 484, 485, 500, 5,   5,   6,   21,  22,  37,
  38,  53,  54,  69,  70,  85,  86,  101, 102, 117, 118, 133, 134, 149, 150,
  165, 166, 181, 182, 197, 198, 213, 214, 229, 230, 245, 246, 261, 262, 277,
  278, 293, 294, 309, 310, 325, 326, 341, 342, 357, 358, 373, 374, 389, 390,
  405, 406, 421, 422, 437, 438, 453, 454, 469, 470, 485, 486, 501, 6,   6,
  7,   22,  23,  38,  39,  54,  55,  70,  71,  86,  87,  102, 103, 118, 119,
  134, 135, 150, 151, 166, 167, 182, 183, 198, 199, 214, 215, 230, 231, 246,
  247, 262, 263, 278, 279, 294, 295, 310, 311, 326, 327, 342, 343, 358, 359,
  374, 375, 390, 391, 406, 407, 422, 423, 438, 439, 454, 455, 470, 471, 486,
  487, 502, 7,   7,   8,   23,  24,  39,  40,  55,  56,  71,  72,  87,  88,
  103, 104, 119, 120, 135, 136, 151, 152, 167, 168, 183, 184, 199, 200, 215,
  216, 231, 232, 247, 248, 263, 264, 279, 280, 295, 296, 311, 312, 327, 328,
  343, 344, 359, 360, 375, 376, 391, 392, 407, 408, 423, 424, 439, 440, 455,
  456, 471, 472, 487, 488, 503, 8,   8,   9,   24,  25,  40,  41,  56,  57,
  72,  73,  88,  89,  104, 105, 120, 121, 136, 137, 152, 153, 168, 169, 184,
  185, 200, 201, 216, 217, 232, 233, 248, 249, 264, 265, 280, 281, 296, 297,
  312, 313, 328, 329, 344, 345, 360, 361, 376, 377, 392, 393, 408, 409, 424,
  425, 440, 441, 456, 457, 472, 473, 488, 489, 504, 9,   9,   10,  25,  26,
  41,  42,  57,  58,  73,  74,  89,  90,  105, 106, 121, 122, 137, 138, 153,
  154, 169, 170, 185, 186, 201, 202, 217, 218, 233, 234, 249, 250, 265, 266,
  281, 282, 297, 298, 313, 314, 329, 330, 345, 346, 361, 362, 377, 378, 393,
  394, 409, 410, 425, 426, 441, 442, 457, 458, 473, 474, 489, 490, 505, 10,
  10,  11,  26,  27,  42,  43,  58,  59,  74,  75,  90,  91,  106, 107, 122,
  123, 138, 139, 154, 155, 170, 171, 186, 187, 202, 203, 218, 219, 234, 235,
  250, 251, 266, 267, 282, 283, 298, 299, 314, 315, 330, 331, 346, 347, 362,
  363, 378, 379, 394, 395, 410, 411, 426, 427, 442, 443, 458, 459, 474, 475,
  490, 491, 506, 11,  11,  12,  27,  28,  43,  44,  59,  60,  75,  76,  91,
  92,  107, 108, 123, 124, 139, 140, 155, 156, 171, 172, 187, 188, 203, 204,
  219, 220, 235, 236, 251, 252, 267, 268, 283, 284, 299, 300, 315, 316, 331,
  332, 347, 348, 363, 364, 379, 380, 395, 396, 411, 412, 427, 428, 443, 444,
  459, 460, 475, 476, 491, 492, 507, 12,  12,  13,  28,  29,  44,  45,  60,
  61,  76,  77,  92,  93,  108, 109, 124, 125, 140, 141, 156, 157, 172, 173,
  188, 189, 204, 205, 220, 221, 236, 237, 252, 253, 268, 269, 284, 285, 300,
  301, 316, 317, 332, 333, 348, 349, 364, 365, 380, 381, 396, 397, 412, 413,
  428, 429, 444, 445, 460, 461, 476, 477, 492, 493, 508, 13,  13,  14,  29,
  30,  45,  46,  61,  62,  77,  78,  93,  94,  109, 110, 125, 126, 141, 142,
  157, 158, 173, 174, 189, 190, 205, 206, 221, 222, 237, 238, 253, 254, 269,
  270, 285, 286, 301, 302, 317, 318, 333, 334, 349, 350, 365, 366, 381, 382,
  397, 398, 413, 414, 429, 430, 445, 446, 461, 462, 477, 478, 493, 494, 509,
  14,  14,  15,  30,  31,  46,  47,  62,  63,  78,  79,  94,  95,  110, 111,
  126, 127, 142, 143, 158, 159, 174, 175, 190, 191, 206, 207, 222, 223, 238,
  239, 254, 255, 270, 271, 286, 287, 302, 303, 318, 319, 334, 335, 350, 351,
  366, 367, 382, 383, 398, 399, 414, 415, 430, 431, 446, 447, 462, 463, 478,
  479, 494, 495, 510, 0,   0
};

DECLARE_ALIGNED(16, static const int16_t,
                mcol_scan_32x16_neighbors[513 * MAX_NEIGHBORS]) = {
  0,   0,   0,   0,   32,  32,  64,  64,  96,  96,  128, 128, 160, 160, 192,
  192, 224, 224, 256, 256, 288, 288, 320, 320, 352, 352, 384, 384, 416, 416,
  448, 448, 0,   0,   1,   32,  33,  64,  65,  96,  97,  128, 129, 160, 161,
  192, 193, 224, 225, 256, 257, 288, 289, 320, 321, 352, 353, 384, 385, 416,
  417, 448, 449, 480, 1,   1,   2,   33,  34,  65,  66,  97,  98,  129, 130,
  161, 162, 193, 194, 225, 226, 257, 258, 289, 290, 321, 322, 353, 354, 385,
  386, 417, 418, 449, 450, 481, 2,   2,   3,   34,  35,  66,  67,  98,  99,
  130, 131, 162, 163, 194, 195, 226, 227, 258, 259, 290, 291, 322, 323, 354,
  355, 386, 387, 418, 419, 450, 451, 482, 3,   3,   4,   35,  36,  67,  68,
  99,  100, 131, 132, 163, 164, 195, 196, 227, 228, 259, 260, 291, 292, 323,
  324, 355, 356, 387, 388, 419, 420, 451, 452, 483, 4,   4,   5,   36,  37,
  68,  69,  100, 101, 132, 133, 164, 165, 196, 197, 228, 229, 260, 261, 292,
  293, 324, 325, 356, 357, 388, 389, 420, 421, 452, 453, 484, 5,   5,   6,
  37,  38,  69,  70,  101, 102, 133, 134, 165, 166, 197, 198, 229, 230, 261,
  262, 293, 294, 325, 326, 357, 358, 389, 390, 421, 422, 453, 454, 485, 6,
  6,   7,   38,  39,  70,  71,  102, 103, 134, 135, 166, 167, 198, 199, 230,
  231, 262, 263, 294, 295, 326, 327, 358, 359, 390, 391, 422, 423, 454, 455,
  486, 7,   7,   8,   39,  40,  71,  72,  103, 104, 135, 136, 167, 168, 199,
  200, 231, 232, 263, 264, 295, 296, 327, 328, 359, 360, 391, 392, 423, 424,
  455, 456, 487, 8,   8,   9,   40,  41,  72,  73,  104, 105, 136, 137, 168,
  169, 200, 201, 232, 233, 264, 265, 296, 297, 328, 329, 360, 361, 392, 393,
  424, 425, 456, 457, 488, 9,   9,   10,  41,  42,  73,  74,  105, 106, 137,
  138, 169, 170, 201, 202, 233, 234, 265, 266, 297, 298, 329, 330, 361, 362,
  393, 394, 425, 426, 457, 458, 489, 10,  10,  11,  42,  43,  74,  75,  106,
  107, 138, 139, 170, 171, 202, 203, 234, 235, 266, 267, 298, 299, 330, 331,
  362, 363, 394, 395, 426, 427, 458, 459, 490, 11,  11,  12,  43,  44,  75,
  76,  107, 108, 139, 140, 171, 172, 203, 204, 235, 236, 267, 268, 299, 300,
  331, 332, 363, 364, 395, 396, 427, 428, 459, 460, 491, 12,  12,  13,  44,
  45,  76,  77,  108, 109, 140, 141, 172, 173, 204, 205, 236, 237, 268, 269,
  300, 301, 332, 333, 364, 365, 396, 397, 428, 429, 460, 461, 492, 13,  13,
  14,  45,  46,  77,  78,  109, 110, 141, 142, 173, 174, 205, 206, 237, 238,
  269, 270, 301, 302, 333, 334, 365, 366, 397, 398, 429, 430, 461, 462, 493,
  14,  14,  15,  46,  47,  78,  79,  110, 111, 142, 143, 174, 175, 206, 207,
  238, 239, 270, 271, 302, 303, 334, 335, 366, 367, 398, 399, 430, 431, 462,
  463, 494, 15,  15,  16,  47,  48,  79,  80,  111, 112, 143, 144, 175, 176,
  207, 208, 239, 240, 271, 272, 303, 304, 335, 336, 367, 368, 399, 400, 431,
  432, 463, 464, 495, 16,  16,  17,  48,  49,  80,  81,  112, 113, 144, 145,
  176, 177, 208, 209, 240, 241, 272, 273, 304, 305, 336, 337, 368, 369, 400,
  401, 432, 433, 464, 465, 496, 17,  17,  18,  49,  50,  81,  82,  113, 114,
  145, 146, 177, 178, 209, 210, 241, 242, 273, 274, 305, 306, 337, 338, 369,
  370, 401, 402, 433, 434, 465, 466, 497, 18,  18,  19,  50,  51,  82,  83,
  114, 115, 146, 147, 178, 179, 210, 211, 242, 243, 274, 275, 306, 307, 338,
  339, 370, 371, 402, 403, 434, 435, 466, 467, 498, 19,  19,  20,  51,  52,
  83,  84,  115, 116, 147, 148, 179, 180, 211, 212, 243, 244, 275, 276, 307,
  308, 339, 340, 371, 372, 403, 404, 435, 436, 467, 468, 499, 20,  20,  21,
  52,  53,  84,  85,  116, 117, 148, 149, 180, 181, 212, 213, 244, 245, 276,
  277, 308, 309, 340, 341, 372, 373, 404, 405, 436, 437, 468, 469, 500, 21,
  21,  22,  53,  54,  85,  86,  117, 118, 149, 150, 181, 182, 213, 214, 245,
  246, 277, 278, 309, 310, 341, 342, 373, 374, 405, 406, 437, 438, 469, 470,
  501, 22,  22,  23,  54,  55,  86,  87,  118, 119, 150, 151, 182, 183, 214,
  215, 246, 247, 278, 279, 310, 311, 342, 343, 374, 375, 406, 407, 438, 439,
  470, 471, 502, 23,  23,  24,  55,  56,  87,  88,  119, 120, 151, 152, 183,
  184, 215, 216, 247, 248, 279, 280, 311, 312, 343, 344, 375, 376, 407, 408,
  439, 440, 471, 472, 503, 24,  24,  25,  56,  57,  88,  89,  120, 121, 152,
  153, 184, 185, 216, 217, 248, 249, 280, 281, 312, 313, 344, 345, 376, 377,
  408, 409, 440, 441, 472, 473, 504, 25,  25,  26,  57,  58,  89,  90,  121,
  122, 153, 154, 185, 186, 217, 218, 249, 250, 281, 282, 313, 314, 345, 346,
  377, 378, 409, 410, 441, 442, 473, 474, 505, 26,  26,  27,  58,  59,  90,
  91,  122, 123, 154, 155, 186, 187, 218, 219, 250, 251, 282, 283, 314, 315,
  346, 347, 378, 379, 410, 411, 442, 443, 474, 475, 506, 27,  27,  28,  59,
  60,  91,  92,  123, 124, 155, 156, 187, 188, 219, 220, 251, 252, 283, 284,
  315, 316, 347, 348, 379, 380, 411, 412, 443, 444, 475, 476, 507, 28,  28,
  29,  60,  61,  92,  93,  124, 125, 156, 157, 188, 189, 220, 221, 252, 253,
  284, 285, 316, 317, 348, 349, 380, 381, 412, 413, 444, 445, 476, 477, 508,
  29,  29,  30,  61,  62,  93,  94,  125, 126, 157, 158, 189, 190, 221, 222,
  253, 254, 285, 286, 317, 318, 349, 350, 381, 382, 413, 414, 445, 446, 477,
  478, 509, 30,  30,  31,  62,  63,  94,  95,  126, 127, 158, 159, 190, 191,
  222, 223, 254, 255, 286, 287, 318, 319, 350, 351, 382, 383, 414, 415, 446,
  447, 478, 479, 510, 0,   0
};

DECLARE_ALIGNED(16, static const int16_t,
                mrow_scan_16x32_neighbors[513 * MAX_NEIGHBORS]) = {
  0,   0,   0,   0,   1,   1,   2,   2,   3,   3,   4,   4,   5,   5,   6,
  6,   7,   7,   8,   8,   9,   9,   10,  10,  11,  11,  12,  12,  13,  13,
  14,  14,  0,   0,   1,   16,  2,   17,  3,   18,  4,   19,  5,   20,  6,
  21,  7,   22,  8,   23,  9,   24,  10,  25,  11,  26,  12,  27,  13,  28,
  14,  29,  15,  30,  16,  16,  17,  32,  18,  33,  19,  34,  20,  35,  21,
  36,  22,  37,  23,  38,  24,  39,  25,  40,  26,  41,  27,  42,  28,  43,
  29,  44,  30,  45,  31,  46,  32,  32,  33,  48,  34,  49,  35,  50,  36,
  51,  37,  52,  38,  53,  39,  54,  40,  55,  41,  56,  42,  57,  43,  58,
  44,  59,  45,  60,  46,  61,  47,  62,  48,  48,  49,  64,  50,  65,  51,
  66,  52,  67,  53,  68,  54,  69,  55,  70,  56,  71,  57,  72,  58,  73,
  59,  74,  60,  75,  61,  76,  62,  77,  63,  78,  64,  64,  65,  80,  66,
  81,  67,  82,  68,  83,  69,  84,  70,  85,  71,  86,  72,  87,  73,  88,
  74,  89,  75,  90,  76,  91,  77,  92,  78,  93,  79,  94,  80,  80,  81,
  96,  82,  97,  83,  98,  84,  99,  85,  100, 86,  101, 87,  102, 88,  103,
  89,  104, 90,  105, 91,  106, 92,  107, 93,  108, 94,  109, 95,  110, 96,
  96,  97,  112, 98,  113, 99,  114, 100, 115, 101, 116, 102, 117, 103, 118,
  104, 119, 105, 120, 106, 121, 107, 122, 108, 123, 109, 124, 110, 125, 111,
  126, 112, 112, 113, 128, 114, 129, 115, 130, 116, 131, 117, 132, 118, 133,
  119, 134, 120, 135, 121, 136, 122, 137, 123, 138, 124, 139, 125, 140, 126,
  141, 127, 142, 128, 128, 129, 144, 130, 145, 131, 146, 132, 147, 133, 148,
  134, 149, 135, 150, 136, 151, 137, 152, 138, 153, 139, 154, 140, 155, 141,
  156, 142, 157, 143, 158, 144, 144, 145, 160, 146, 161, 147, 162, 148, 163,
  149, 164, 150, 165, 151, 166, 152, 167, 153, 168, 154, 169, 155, 170, 156,
  171, 157, 172, 158, 173, 159, 174, 160, 160, 161, 176, 162, 177, 163, 178,
  164, 179, 165, 180, 166, 181, 167, 182, 168, 183, 169, 184, 170, 185, 171,
  186, 172, 187, 173, 188, 174, 189, 175, 190, 176, 176, 177, 192, 178, 193,
  179, 194, 180, 195, 181, 196, 182, 197, 183, 198, 184, 199, 185, 200, 186,
  201, 187, 202, 188, 203, 189, 204, 190, 205, 191, 206, 192, 192, 193, 208,
  194, 209, 195, 210, 196, 211, 197, 212, 198, 213, 199, 214, 200, 215, 201,
  216, 202, 217, 203, 218, 204, 219, 205, 220, 206, 221, 207, 222, 208, 208,
  209, 224, 210, 225, 211, 226, 212, 227, 213, 228, 214, 229, 215, 230, 216,
  231, 217, 232, 218, 233, 219, 234, 220, 235, 221, 236, 222, 237, 223, 238,
  224, 224, 225, 240, 226, 241, 227, 242, 228, 243, 229, 244, 230, 245, 231,
  246, 232, 247, 233, 248, 234, 249, 235, 250, 236, 251, 237, 252, 238, 253,
  239, 254, 240, 240, 241, 256, 242, 257, 243, 258, 244, 259, 245, 260, 246,
  261, 247, 262, 248, 263, 249, 264, 250, 265, 251, 266, 252, 267, 253, 268,
  254, 269, 255, 270, 256, 256, 257, 272, 258, 273, 259, 274, 260, 275, 261,
  276, 262, 277, 263, 278, 264, 279, 265, 280, 266, 281, 267, 282, 268, 283,
  269, 284, 270, 285, 271, 286, 272, 272, 273, 288, 274, 289, 275, 290, 276,
  291, 277, 292, 278, 293, 279, 294, 280, 295, 281, 296, 282, 297, 283, 298,
  284, 299, 285, 300, 286, 301, 287, 302, 288, 288, 289, 304, 290, 305, 291,
  306, 292, 307, 293, 308, 294, 309, 295, 310, 296, 311, 297, 312, 298, 313,
  299, 314, 300, 315, 301, 316, 302, 317, 303, 318, 304, 304, 305, 320, 306,
  321, 307, 322, 308, 323, 309, 324, 310, 325, 311, 326, 312, 327, 313, 328,
  314, 329, 315, 330, 316, 331, 317, 332, 318, 333, 319, 334, 320, 320, 321,
  336, 322, 337, 323, 338, 324, 339, 325, 340, 326, 341, 327, 342, 328, 343,
  329, 344, 330, 345, 331, 346, 332, 347, 333, 348, 334, 349, 335, 350, 336,
  336, 337, 352, 338, 353, 339, 354, 340, 355, 341, 356, 342, 357, 343, 358,
  344, 359, 345, 360, 346, 361, 347, 362, 348, 363, 349, 364, 350, 365, 351,
  366, 352, 352, 353, 368, 354, 369, 355, 370, 356, 371, 357, 372, 358, 373,
  359, 374, 360, 375, 361, 376, 362, 377, 363, 378, 364, 379, 365, 380, 366,
  381, 367, 382, 368, 368, 369, 384, 370, 385, 371, 386, 372, 387, 373, 388,
  374, 389, 375, 390, 376, 391, 377, 392, 378, 393, 379, 394, 380, 395, 381,
  396, 382, 397, 383, 398, 384, 384, 385, 400, 386, 401, 387, 402, 388, 403,
  389, 404, 390, 405, 391, 406, 392, 407, 393, 408, 394, 409, 395, 410, 396,
  411, 397, 412, 398, 413, 399, 414, 400, 400, 401, 416, 402, 417, 403, 418,
  404, 419, 405, 420, 406, 421, 407, 422, 408, 423, 409, 424, 410, 425, 411,
  426, 412, 427, 413, 428, 414, 429, 415, 430, 416, 416, 417, 432, 418, 433,
  419, 434, 420, 435, 421, 436, 422, 437, 423, 438, 424, 439, 425, 440, 426,
  441, 427, 442, 428, 443, 429, 444, 430, 445, 431, 446, 432, 432, 433, 448,
  434, 449, 435, 450, 436, 451, 437, 452, 438, 453, 439, 454, 440, 455, 441,
  456, 442, 457, 443, 458, 444, 459, 445, 460, 446, 461, 447, 462, 448, 448,
  449, 464, 450, 465, 451, 466, 452, 467, 453, 468, 454, 469, 455, 470, 456,
  471, 457, 472, 458, 473, 459, 474, 460, 475, 461, 476, 462, 477, 463, 478,
  464, 464, 465, 480, 466, 481, 467, 482, 468, 483, 469, 484, 470, 485, 471,
  486, 472, 487, 473, 488, 474, 489, 475, 490, 476, 491, 477, 492, 478, 493,
  479, 494, 480, 480, 481, 496, 482, 497, 483, 498, 484, 499, 485, 500, 486,
  501, 487, 502, 488, 503, 489, 504, 490, 505, 491, 506, 492, 507, 493, 508,
  494, 509, 495, 510, 0,   0
};

DECLARE_ALIGNED(16, static const int16_t,
                mrow_scan_32x16_neighbors[513 * MAX_NEIGHBORS]) = {
  0,   0,   0,   0,   1,   1,   2,   2,   3,   3,   4,   4,   5,   5,   6,
  6,   7,   7,   8,   8,   9,   9,   10,  10,  11,  11,  12,  12,  13,  13,
  14,  14,  15,  15,  16,  16,  17,  17,  18,  18,  19,  19,  20,  20,  21,
  21,  22,  22,  23,  23,  24,  24,  25,  25,  26,  26,  27,  27,  28,  28,
  29,  29,  30,  30,  0,   0,   1,   32,  2,   33,  3,   34,  4,   35,  5,
  36,  6,   37,  7,   38,  8,   39,  9,   40,  10,  41,  11,  42,  12,  43,
  13,  44,  14,  45,  15,  46,  16,  47,  17,  48,  18,  49,  19,  50,  20,
  51,  21,  52,  22,  53,  23,  54,  24,  55,  25,  56,  26,  57,  27,  58,
  28,  59,  29,  60,  30,  61,  31,  62,  32,  32,  33,  64,  34,  65,  35,
  66,  36,  67,  37,  68,  38,  69,  39,  70,  40,  71,  41,  72,  42,  73,
  43,  74,  44,  75,  45,  76,  46,  77,  47,  78,  48,  79,  49,  80,  50,
  81,  51,  82,  52,  83,  53,  84,  54,  85,  55,  86,  56,  87,  57,  88,
  58,  89,  59,  90,  60,  91,  61,  92,  62,  93,  63,  94,  64,  64,  65,
  96,  66,  97,  67,  98,  68,  99,  69,  100, 70,  101, 71,  102, 72,  103,
  73,  104, 74,  105, 75,  106, 76,  107, 77,  108, 78,  109, 79,  110, 80,
  111, 81,  112, 82,  113, 83,  114, 84,  115, 85,  116, 86,  117, 87,  118,
  88,  119, 89,  120, 90,  121, 91,  122, 92,  123, 93,  124, 94,  125, 95,
  126, 96,  96,  97,  128, 98,  129, 99,  130, 100, 131, 101, 132, 102, 133,
  103, 134, 104, 135, 105, 136, 106, 137, 107, 138, 108, 139, 109, 140, 110,
  141, 111, 142, 112, 143, 113, 144, 114, 145, 115, 146, 116, 147, 117, 148,
  118, 149, 119, 150, 120, 151, 121, 152, 122, 153, 123, 154, 124, 155, 125,
  156, 126, 157, 127, 158, 128, 128, 129, 160, 130, 161, 131, 162, 132, 163,
  133, 164, 134, 165, 135, 166, 136, 167, 137, 168, 138, 169, 139, 170, 140,
  171, 141, 172, 142, 173, 143, 174, 144, 175, 145, 176, 146, 177, 147, 178,
  148, 179, 149, 180, 150, 181, 151, 182, 152, 183, 153, 184, 154, 185, 155,
  186, 156, 187, 157, 188, 158, 189, 159, 190, 160, 160, 161, 192, 162, 193,
  163, 194, 164, 195, 165, 196, 166, 197, 167, 198, 168, 199, 169, 200, 170,
  201, 171, 202, 172, 203, 173, 204, 174, 205, 175, 206, 176, 207, 177, 208,
  178, 209, 179, 210, 180, 211, 181, 212, 182, 213, 183, 214, 184, 215, 185,
  216, 186, 217, 187, 218, 188, 219, 189, 220, 190, 221, 191, 222, 192, 192,
  193, 224, 194, 225, 195, 226, 196, 227, 197, 228, 198, 229, 199, 230, 200,
  231, 201, 232, 202, 233, 203, 234, 204, 235, 205, 236, 206, 237, 207, 238,
  208, 239, 209, 240, 210, 241, 211, 242, 212, 243, 213, 244, 214, 245, 215,
  246, 216, 247, 217, 248, 218, 249, 219, 250, 220, 251, 221, 252, 222, 253,
  223, 254, 224, 224, 225, 256, 226, 257, 227, 258, 228, 259, 229, 260, 230,
  261, 231, 262, 232, 263, 233, 264, 234, 265, 235, 266, 236, 267, 237, 268,
  238, 269, 239, 270, 240, 271, 241, 272, 242, 273, 243, 274, 244, 275, 245,
  276, 246, 277, 247, 278, 248, 279, 249, 280, 250, 281, 251, 282, 252, 283,
  253, 284, 254, 285, 255, 286, 256, 256, 257, 288, 258, 289, 259, 290, 260,
  291, 261, 292, 262, 293, 263, 294, 264, 295, 265, 296, 266, 297, 267, 298,
  268, 299, 269, 300, 270, 301, 271, 302, 272, 303, 273, 304, 274, 305, 275,
  306, 276, 307, 277, 308, 278, 309, 279, 310, 280, 311, 281, 312, 282, 313,
  283, 314, 284, 315, 285, 316, 286, 317, 287, 318, 288, 288, 289, 320, 290,
  321, 291, 322, 292, 323, 293, 324, 294, 325, 295, 326, 296, 327, 297, 328,
  298, 329, 299, 330, 300, 331, 301, 332, 302, 333, 303, 334, 304, 335, 305,
  336, 306, 337, 307, 338, 308, 339, 309, 340, 310, 341, 311, 342, 312, 343,
  313, 344, 314, 345, 315, 346, 316, 347, 317, 348, 318, 349, 319, 350, 320,
  320, 321, 352, 322, 353, 323, 354, 324, 355, 325, 356, 326, 357, 327, 358,
  328, 359, 329, 360, 330, 361, 331, 362, 332, 363, 333, 364, 334, 365, 335,
  366, 336, 367, 337, 368, 338, 369, 339, 370, 340, 371, 341, 372, 342, 373,
  343, 374, 344, 375, 345, 376, 346, 377, 347, 378, 348, 379, 349, 380, 350,
  381, 351, 382, 352, 352, 353, 384, 354, 385, 355, 386, 356, 387, 357, 388,
  358, 389, 359, 390, 360, 391, 361, 392, 362, 393, 363, 394, 364, 395, 365,
  396, 366, 397, 367, 398, 368, 399, 369, 400, 370, 401, 371, 402, 372, 403,
  373, 404, 374, 405, 375, 406, 376, 407, 377, 408, 378, 409, 379, 410, 380,
  411, 381, 412, 382, 413, 383, 414, 384, 384, 385, 416, 386, 417, 387, 418,
  388, 419, 389, 420, 390, 421, 391, 422, 392, 423, 393, 424, 394, 425, 395,
  426, 396, 427, 397, 428, 398, 429, 399, 430, 400, 431, 401, 432, 402, 433,
  403, 434, 404, 435, 405, 436, 406, 437, 407, 438, 408, 439, 409, 440, 410,
  441, 411, 442, 412, 443, 413, 444, 414, 445, 415, 446, 416, 416, 417, 448,
  418, 449, 419, 450, 420, 451, 421, 452, 422, 453, 423, 454, 424, 455, 425,
  456, 426, 457, 427, 458, 428, 459, 429, 460, 430, 461, 431, 462, 432, 463,
  433, 464, 434, 465, 435, 466, 436, 467, 437, 468, 438, 469, 439, 470, 440,
  471, 441, 472, 442, 473, 443, 474, 444, 475, 445, 476, 446, 477, 447, 478,
  448, 448, 449, 480, 450, 481, 451, 482, 452, 483, 453, 484, 454, 485, 455,
  486, 456, 487, 457, 488, 458, 489, 459, 490, 460, 491, 461, 492, 462, 493,
  463, 494, 464, 495, 465, 496, 466, 497, 467, 498, 468, 499, 469, 500, 470,
  501, 471, 502, 472, 503, 473, 504, 474, 505, 475, 506, 476, 507, 477, 508,
  478, 509, 479, 510, 0,   0
};

#endif  // CONFIG_EXT_TX

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t,
                mcol_scan_16x16_neighbors[257 * MAX_NEIGHBORS]) = {
  0,   0,   0,   0,   16,  16,  32,  32,  48,  48,  64,  64,  80,  80,  96,
  96,  112, 112, 128, 128, 144, 144, 160, 160, 176, 176, 192, 192, 208, 208,
  224, 224, 0,   0,   1,   16,  17,  32,  33,  48,  49,  64,  65,  80,  81,
  96,  97,  112, 113, 128, 129, 144, 145, 160, 161, 176, 177, 192, 193, 208,
  209, 224, 225, 240, 1,   1,   2,   17,  18,  33,  34,  49,  50,  65,  66,
  81,  82,  97,  98,  113, 114, 129, 130, 145, 146, 161, 162, 177, 178, 193,
  194, 209, 210, 225, 226, 241, 2,   2,   3,   18,  19,  34,  35,  50,  51,
  66,  67,  82,  83,  98,  99,  114, 115, 130, 131, 146, 147, 162, 163, 178,
  179, 194, 195, 210, 211, 226, 227, 242, 3,   3,   4,   19,  20,  35,  36,
  51,  52,  67,  68,  83,  84,  99,  100, 115, 116, 131, 132, 147, 148, 163,
  164, 179, 180, 195, 196, 211, 212, 227, 228, 243, 4,   4,   5,   20,  21,
  36,  37,  52,  53,  68,  69,  84,  85,  100, 101, 116, 117, 132, 133, 148,
  149, 164, 165, 180, 181, 196, 197, 212, 213, 228, 229, 244, 5,   5,   6,
  21,  22,  37,  38,  53,  54,  69,  70,  85,  86,  101, 102, 117, 118, 133,
  134, 149, 150, 165, 166, 181, 182, 197, 198, 213, 214, 229, 230, 245, 6,
  6,   7,   22,  23,  38,  39,  54,  55,  70,  71,  86,  87,  102, 103, 118,
  119, 134, 135, 150, 151, 166, 167, 182, 183, 198, 199, 214, 215, 230, 231,
  246, 7,   7,   8,   23,  24,  39,  40,  55,  56,  71,  72,  87,  88,  103,
  104, 119, 120, 135, 136, 151, 152, 167, 168, 183, 184, 199, 200, 215, 216,
  231, 232, 247, 8,   8,   9,   24,  25,  40,  41,  56,  57,  72,  73,  88,
  89,  104, 105, 120, 121, 136, 137, 152, 153, 168, 169, 184, 185, 200, 201,
  216, 217, 232, 233, 248, 9,   9,   10,  25,  26,  41,  42,  57,  58,  73,
  74,  89,  90,  105, 106, 121, 122, 137, 138, 153, 154, 169, 170, 185, 186,
  201, 202, 217, 218, 233, 234, 249, 10,  10,  11,  26,  27,  42,  43,  58,
  59,  74,  75,  90,  91,  106, 107, 122, 123, 138, 139, 154, 155, 170, 171,
  186, 187, 202, 203, 218, 219, 234, 235, 250, 11,  11,  12,  27,  28,  43,
  44,  59,  60,  75,  76,  91,  92,  107, 108, 123, 124, 139, 140, 155, 156,
  171, 172, 187, 188, 203, 204, 219, 220, 235, 236, 251, 12,  12,  13,  28,
  29,  44,  45,  60,  61,  76,  77,  92,  93,  108, 109, 124, 125, 140, 141,
  156, 157, 172, 173, 188, 189, 204, 205, 220, 221, 236, 237, 252, 13,  13,
  14,  29,  30,  45,  46,  61,  62,  77,  78,  93,  94,  109, 110, 125, 126,
  141, 142, 157, 158, 173, 174, 189, 190, 205, 206, 221, 222, 237, 238, 253,
  14,  14,  15,  30,  31,  46,  47,  62,  63,  78,  79,  94,  95,  110, 111,
  126, 127, 142, 143, 158, 159, 174, 175, 190, 191, 206, 207, 222, 223, 238,
  239, 254, 0,   0,
};

DECLARE_ALIGNED(16, static const int16_t,
                mrow_scan_16x16_neighbors[257 * MAX_NEIGHBORS]) = {
  0,   0,   0,   0,   1,   1,   2,   2,   3,   3,   4,   4,   5,   5,   6,
  6,   7,   7,   8,   8,   9,   9,   10,  10,  11,  11,  12,  12,  13,  13,
  14,  14,  0,   0,   1,   16,  2,   17,  3,   18,  4,   19,  5,   20,  6,
  21,  7,   22,  8,   23,  9,   24,  10,  25,  11,  26,  12,  27,  13,  28,
  14,  29,  15,  30,  16,  16,  17,  32,  18,  33,  19,  34,  20,  35,  21,
  36,  22,  37,  23,  38,  24,  39,  25,  40,  26,  41,  27,  42,  28,  43,
  29,  44,  30,  45,  31,  46,  32,  32,  33,  48,  34,  49,  35,  50,  36,
  51,  37,  52,  38,  53,  39,  54,  40,  55,  41,  56,  42,  57,  43,  58,
  44,  59,  45,  60,  46,  61,  47,  62,  48,  48,  49,  64,  50,  65,  51,
  66,  52,  67,  53,  68,  54,  69,  55,  70,  56,  71,  57,  72,  58,  73,
  59,  74,  60,  75,  61,  76,  62,  77,  63,  78,  64,  64,  65,  80,  66,
  81,  67,  82,  68,  83,  69,  84,  70,  85,  71,  86,  72,  87,  73,  88,
  74,  89,  75,  90,  76,  91,  77,  92,  78,  93,  79,  94,  80,  80,  81,
  96,  82,  97,  83,  98,  84,  99,  85,  100, 86,  101, 87,  102, 88,  103,
  89,  104, 90,  105, 91,  106, 92,  107, 93,  108, 94,  109, 95,  110, 96,
  96,  97,  112, 98,  113, 99,  114, 100, 115, 101, 116, 102, 117, 103, 118,
  104, 119, 105, 120, 106, 121, 107, 122, 108, 123, 109, 124, 110, 125, 111,
  126, 112, 112, 113, 128, 114, 129, 115, 130, 116, 131, 117, 132, 118, 133,
  119, 134, 120, 135, 121, 136, 122, 137, 123, 138, 124, 139, 125, 140, 126,
  141, 127, 142, 128, 128, 129, 144, 130, 145, 131, 146, 132, 147, 133, 148,
  134, 149, 135, 150, 136, 151, 137, 152, 138, 153, 139, 154, 140, 155, 141,
  156, 142, 157, 143, 158, 144, 144, 145, 160, 146, 161, 147, 162, 148, 163,
  149, 164, 150, 165, 151, 166, 152, 167, 153, 168, 154, 169, 155, 170, 156,
  171, 157, 172, 158, 173, 159, 174, 160, 160, 161, 176, 162, 177, 163, 178,
  164, 179, 165, 180, 166, 181, 167, 182, 168, 183, 169, 184, 170, 185, 171,
  186, 172, 187, 173, 188, 174, 189, 175, 190, 176, 176, 177, 192, 178, 193,
  179, 194, 180, 195, 181, 196, 182, 197, 183, 198, 184, 199, 185, 200, 186,
  201, 187, 202, 188, 203, 189, 204, 190, 205, 191, 206, 192, 192, 193, 208,
  194, 209, 195, 210, 196, 211, 197, 212, 198, 213, 199, 214, 200, 215, 201,
  216, 202, 217, 203, 218, 204, 219, 205, 220, 206, 221, 207, 222, 208, 208,
  209, 224, 210, 225, 211, 226, 212, 227, 213, 228, 214, 229, 215, 230, 216,
  231, 217, 232, 218, 233, 219, 234, 220, 235, 221, 236, 222, 237, 223, 238,
  224, 224, 225, 240, 226, 241, 227, 242, 228, 243, 229, 244, 230, 245, 231,
  246, 232, 247, 233, 248, 234, 249, 235, 250, 236, 251, 237, 252, 238, 253,
  239, 254, 0,   0,
};
#endif  // CONFIG_EXT_TX

DECLARE_ALIGNED(16, static const int16_t,
                col_scan_16x16_neighbors[257 * MAX_NEIGHBORS]) = {
  0,   0,   0,   0,   16,  16,  32,  32,  16,  0,   48,  48,  1,   16,  64,
  64,  17,  32,  80,  80,  33,  48,  17,  1,   49,  64,  96,  96,  2,   17,
  65,  80,  18,  33,  112, 112, 34,  49,  81,  96,  18,  2,   50,  65,  128,
  128, 3,   18,  97,  112, 19,  34,  66,  81,  144, 144, 82,  97,  35,  50,
  113, 128, 19,  3,   51,  66,  160, 160, 4,   19,  98,  113, 129, 144, 67,
  82,  20,  35,  83,  98,  114, 129, 36,  51,  176, 176, 20,  4,   145, 160,
  52,  67,  99,  114, 5,   20,  130, 145, 68,  83,  192, 192, 161, 176, 21,
  36,  115, 130, 84,  99,  37,  52,  146, 161, 208, 208, 53,  68,  21,  5,
  100, 115, 177, 192, 131, 146, 69,  84,  6,   21,  224, 224, 116, 131, 22,
  37,  162, 177, 85,  100, 147, 162, 38,  53,  193, 208, 101, 116, 54,  69,
  22,  6,   132, 147, 178, 193, 70,  85,  163, 178, 209, 224, 7,   22,  117,
  132, 23,  38,  148, 163, 23,  7,   86,  101, 194, 209, 225, 240, 39,  54,
  179, 194, 102, 117, 133, 148, 55,  70,  164, 179, 8,   23,  71,  86,  210,
  225, 118, 133, 149, 164, 195, 210, 24,  39,  87,  102, 40,  55,  56,  71,
  134, 149, 180, 195, 226, 241, 103, 118, 24,  8,   165, 180, 211, 226, 72,
  87,  150, 165, 9,   24,  119, 134, 25,  40,  88,  103, 196, 211, 41,  56,
  135, 150, 181, 196, 104, 119, 57,  72,  227, 242, 166, 181, 120, 135, 151,
  166, 197, 212, 73,  88,  25,  9,   212, 227, 89,  104, 136, 151, 182, 197,
  10,  25,  26,  41,  105, 120, 167, 182, 228, 243, 152, 167, 42,  57,  121,
  136, 213, 228, 58,  73,  198, 213, 74,  89,  137, 152, 183, 198, 168, 183,
  26,  10,  90,  105, 229, 244, 11,  26,  106, 121, 214, 229, 153, 168, 27,
  42,  199, 214, 43,  58,  184, 199, 122, 137, 169, 184, 230, 245, 59,  74,
  27,  11,  75,  90,  138, 153, 200, 215, 215, 230, 91,  106, 12,  27,  28,
  43,  185, 200, 107, 122, 154, 169, 44,  59,  231, 246, 216, 231, 60,  75,
  123, 138, 28,  12,  76,  91,  201, 216, 170, 185, 232, 247, 139, 154, 92,
  107, 13,  28,  108, 123, 29,  44,  186, 201, 217, 232, 155, 170, 45,  60,
  29,  13,  61,  76,  124, 139, 14,  14,  233, 248, 77,  92,  14,  29,  171,
  186, 140, 155, 202, 217, 30,  45,  93,  108, 109, 124, 46,  61,  156, 171,
  62,  77,  187, 202, 15,  30,  125, 140, 218, 233, 78,  93,  31,  46,  172,
  187, 47,  62,  141, 156, 94,  109, 234, 249, 203, 218, 63,  78,  110, 125,
  188, 203, 157, 172, 126, 141, 79,  94,  173, 188, 95,  110, 219, 234, 142,
  157, 204, 219, 235, 250, 111, 126, 158, 173, 127, 142, 189, 204, 220, 235,
  143, 158, 174, 189, 205, 220, 236, 251, 159, 174, 190, 205, 221, 236, 175,
  190, 237, 252, 206, 221, 222, 237, 191, 206, 238, 253, 207, 222, 223, 238,
  239, 254, 0,   0,
};

DECLARE_ALIGNED(16, static const int16_t,
                row_scan_16x16_neighbors[257 * MAX_NEIGHBORS]) = {
  0,   0,   0,   0,   1,   1,   0,   1,   2,   2,   1,   16,  3,   3,   2,
  17,  16,  17,  4,   4,   17,  32,  3,   18,  5,   5,   18,  33,  32,  33,
  4,   19,  33,  48,  6,   6,   19,  34,  5,   20,  34,  49,  48,  49,  7,
  7,   20,  35,  49,  64,  6,   21,  35,  50,  21,  36,  64,  65,  8,   8,
  50,  65,  36,  51,  7,   22,  22,  37,  65,  80,  51,  66,  9,   9,   37,
  52,  8,   23,  66,  81,  52,  67,  80,  81,  23,  38,  10,  10,  38,  53,
  67,  82,  81,  96,  53,  68,  9,   24,  82,  97,  68,  83,  24,  39,  96,
  97,  39,  54,  11,  11,  54,  69,  83,  98,  97,  112, 69,  84,  10,  25,
  25,  40,  40,  55,  98,  113, 84,  99,  12,  12,  55,  70,  112, 113, 70,
  85,  11,  26,  99,  114, 85,  100, 113, 128, 26,  41,  41,  56,  56,  71,
  100, 115, 13,  13,  71,  86,  114, 129, 86,  101, 128, 129, 57,  72,  115,
  130, 101, 116, 12,  27,  42,  57,  14,  14,  72,  87,  27,  42,  129, 144,
  87,  102, 116, 131, 130, 145, 102, 117, 58,  73,  144, 145, 73,  88,  117,
  132, 88,  103, 13,  28,  43,  58,  131, 146, 103, 118, 28,  43,  145, 160,
  132, 147, 74,  89,  89,  104, 118, 133, 146, 161, 104, 119, 160, 161, 59,
  74,  119, 134, 133, 148, 14,  29,  44,  59,  147, 162, 161, 176, 29,  44,
  105, 120, 75,  90,  90,  105, 148, 163, 162, 177, 134, 149, 176, 177, 120,
  135, 149, 164, 163, 178, 15,  30,  135, 150, 177, 192, 60,  75,  106, 121,
  45,  60,  121, 136, 178, 193, 91,  106, 136, 151, 164, 179, 192, 193, 30,
  45,  150, 165, 151, 166, 179, 194, 76,  91,  165, 180, 122, 137, 193, 208,
  107, 122, 137, 152, 208, 209, 180, 195, 61,  76,  152, 167, 194, 209, 166,
  181, 224, 224, 92,  107, 181, 196, 46,  61,  138, 153, 209, 224, 167, 182,
  153, 168, 195, 210, 31,  46,  123, 138, 77,  92,  168, 183, 210, 225, 196,
  211, 225, 240, 182, 197, 154, 169, 108, 123, 139, 154, 183, 198, 62,  77,
  197, 212, 169, 184, 93,  108, 211, 226, 184, 199, 47,  62,  212, 227, 226,
  241, 124, 139, 198, 213, 155, 170, 170, 185, 140, 155, 213, 228, 227, 242,
  109, 124, 78,  93,  185, 200, 228, 243, 199, 214, 200, 215, 214, 229, 125,
  140, 171, 186, 186, 201, 63,  78,  156, 171, 94,  109, 141, 156, 229, 244,
  201, 216, 215, 230, 79,  94,  230, 245, 216, 231, 110, 125, 187, 202, 231,
  246, 217, 232, 157, 172, 202, 217, 126, 141, 95,  110, 142, 157, 172, 187,
  232, 247, 111, 126, 218, 233, 203, 218, 233, 248, 173, 188, 188, 203, 127,
  142, 158, 173, 143, 158, 234, 249, 219, 234, 189, 204, 204, 219, 159, 174,
  174, 189, 235, 250, 205, 220, 175, 190, 190, 205, 220, 235, 191, 206, 221,
  236, 236, 251, 206, 221, 237, 252, 207, 222, 222, 237, 223, 238, 238, 253,
  239, 254, 0,   0,
};

DECLARE_ALIGNED(16, static const int16_t,
                default_scan_16x16_neighbors[257 * MAX_NEIGHBORS]) = {
  0,   0,   0,   0,   16,  0,   16,  16,  1,   16,  17,  1,   32,  32,  17,
  32,  2,   17,  18,  2,   48,  48,  18,  33,  33,  48,  3,   18,  49,  64,
  64,  65,  34,  49,  19,  3,   19,  34,  50,  65,  4,   19,  65,  80,  80,
  81,  35,  50,  20,  4,   20,  35,  66,  81,  81,  96,  51,  66,  96,  97,
  5,   20,  36,  51,  82,  97,  21,  36,  67,  82,  97,  112, 21,  5,   52,
  67,  112, 113, 37,  52,  6,   21,  83,  98,  98,  113, 68,  83,  22,  6,
  113, 128, 22,  37,  53,  68,  84,  99,  99,  114, 128, 129, 114, 129, 69,
  84,  38,  53,  7,   22,  23,  7,   129, 144, 23,  38,  54,  69,  100, 115,
  85,  100, 115, 130, 144, 145, 130, 145, 39,  54,  70,  85,  8,   23,  55,
  70,  116, 131, 101, 116, 145, 160, 24,  39,  24,  8,   86,  101, 131, 146,
  160, 161, 146, 161, 71,  86,  40,  55,  9,   24,  117, 132, 102, 117, 161,
  176, 132, 147, 56,  71,  87,  102, 25,  40,  147, 162, 25,  9,   176, 177,
  162, 177, 72,  87,  41,  56,  118, 133, 133, 148, 103, 118, 10,  25,  148,
  163, 57,  72,  88,  103, 177, 192, 26,  41,  163, 178, 192, 193, 26,  10,
  119, 134, 73,  88,  149, 164, 104, 119, 134, 149, 42,  57,  178, 193, 164,
  179, 11,  26,  58,  73,  193, 208, 89,  104, 135, 150, 120, 135, 27,  42,
  74,  89,  208, 209, 150, 165, 179, 194, 165, 180, 105, 120, 194, 209, 43,
  58,  27,  11,  136, 151, 90,  105, 151, 166, 180, 195, 59,  74,  121, 136,
  209, 224, 195, 210, 224, 225, 166, 181, 106, 121, 75,  90,  12,  27,  181,
  196, 28,  12,  210, 225, 152, 167, 167, 182, 137, 152, 28,  43,  196, 211,
  122, 137, 91,  106, 225, 240, 44,  59,  13,  28,  107, 122, 182, 197, 168,
  183, 211, 226, 153, 168, 226, 241, 60,  75,  197, 212, 138, 153, 29,  44,
  76,  91,  29,  13,  183, 198, 123, 138, 45,  60,  212, 227, 198, 213, 154,
  169, 169, 184, 227, 242, 92,  107, 61,  76,  139, 154, 14,  29,  30,  14,
  184, 199, 213, 228, 108, 123, 199, 214, 228, 243, 77,  92,  30,  45,  170,
  185, 155, 170, 185, 200, 93,  108, 124, 139, 214, 229, 46,  61,  200, 215,
  229, 244, 15,  30,  109, 124, 62,  77,  140, 155, 215, 230, 31,  46,  171,
  186, 186, 201, 201, 216, 78,  93,  230, 245, 125, 140, 47,  62,  216, 231,
  156, 171, 94,  109, 231, 246, 141, 156, 63,  78,  202, 217, 187, 202, 110,
  125, 217, 232, 172, 187, 232, 247, 79,  94,  157, 172, 126, 141, 203, 218,
  95,  110, 233, 248, 218, 233, 142, 157, 111, 126, 173, 188, 188, 203, 234,
  249, 219, 234, 127, 142, 158, 173, 204, 219, 189, 204, 143, 158, 235, 250,
  174, 189, 205, 220, 159, 174, 220, 235, 221, 236, 175, 190, 190, 205, 236,
  251, 206, 221, 237, 252, 191, 206, 222, 237, 207, 222, 238, 253, 223, 238,
  239, 254, 0,   0,
};

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t,
                mcol_scan_32x32_neighbors[1025 * MAX_NEIGHBORS]) = {
  0,   0,    0,   0,    32,  32,   64,  64,   96,  96,   128, 128,  160, 160,
  192, 192,  224, 224,  256, 256,  288, 288,  320, 320,  352, 352,  384, 384,
  416, 416,  448, 448,  480, 480,  512, 512,  544, 544,  576, 576,  608, 608,
  640, 640,  672, 672,  704, 704,  736, 736,  768, 768,  800, 800,  832, 832,
  864, 864,  896, 896,  928, 928,  960, 960,  0,   0,    1,   32,   33,  64,
  65,  96,   97,  128,  129, 160,  161, 192,  193, 224,  225, 256,  257, 288,
  289, 320,  321, 352,  353, 384,  385, 416,  417, 448,  449, 480,  481, 512,
  513, 544,  545, 576,  577, 608,  609, 640,  641, 672,  673, 704,  705, 736,
  737, 768,  769, 800,  801, 832,  833, 864,  865, 896,  897, 928,  929, 960,
  961, 992,  1,   1,    2,   33,   34,  65,   66,  97,   98,  129,  130, 161,
  162, 193,  194, 225,  226, 257,  258, 289,  290, 321,  322, 353,  354, 385,
  386, 417,  418, 449,  450, 481,  482, 513,  514, 545,  546, 577,  578, 609,
  610, 641,  642, 673,  674, 705,  706, 737,  738, 769,  770, 801,  802, 833,
  834, 865,  866, 897,  898, 929,  930, 961,  962, 993,  2,   2,    3,   34,
  35,  66,   67,  98,   99,  130,  131, 162,  163, 194,  195, 226,  227, 258,
  259, 290,  291, 322,  323, 354,  355, 386,  387, 418,  419, 450,  451, 482,
  483, 514,  515, 546,  547, 578,  579, 610,  611, 642,  643, 674,  675, 706,
  707, 738,  739, 770,  771, 802,  803, 834,  835, 866,  867, 898,  899, 930,
  931, 962,  963, 994,  3,   3,    4,   35,   36,  67,   68,  99,   100, 131,
  132, 163,  164, 195,  196, 227,  228, 259,  260, 291,  292, 323,  324, 355,
  356, 387,  388, 419,  420, 451,  452, 483,  484, 515,  516, 547,  548, 579,
  580, 611,  612, 643,  644, 675,  676, 707,  708, 739,  740, 771,  772, 803,
  804, 835,  836, 867,  868, 899,  900, 931,  932, 963,  964, 995,  4,   4,
  5,   36,   37,  68,   69,  100,  101, 132,  133, 164,  165, 196,  197, 228,
  229, 260,  261, 292,  293, 324,  325, 356,  357, 388,  389, 420,  421, 452,
  453, 484,  485, 516,  517, 548,  549, 580,  581, 612,  613, 644,  645, 676,
  677, 708,  709, 740,  741, 772,  773, 804,  805, 836,  837, 868,  869, 900,
  901, 932,  933, 964,  965, 996,  5,   5,    6,   37,   38,  69,   70,  101,
  102, 133,  134, 165,  166, 197,  198, 229,  230, 261,  262, 293,  294, 325,
  326, 357,  358, 389,  390, 421,  422, 453,  454, 485,  486, 517,  518, 549,
  550, 581,  582, 613,  614, 645,  646, 677,  678, 709,  710, 741,  742, 773,
  774, 805,  806, 837,  838, 869,  870, 901,  902, 933,  934, 965,  966, 997,
  6,   6,    7,   38,   39,  70,   71,  102,  103, 134,  135, 166,  167, 198,
  199, 230,  231, 262,  263, 294,  295, 326,  327, 358,  359, 390,  391, 422,
  423, 454,  455, 486,  487, 518,  519, 550,  551, 582,  583, 614,  615, 646,
  647, 678,  679, 710,  711, 742,  743, 774,  775, 806,  807, 838,  839, 870,
  871, 902,  903, 934,  935, 966,  967, 998,  7,   7,    8,   39,   40,  71,
  72,  103,  104, 135,  136, 167,  168, 199,  200, 231,  232, 263,  264, 295,
  296, 327,  328, 359,  360, 391,  392, 423,  424, 455,  456, 487,  488, 519,
  520, 551,  552, 583,  584, 615,  616, 647,  648, 679,  680, 711,  712, 743,
  744, 775,  776, 807,  808, 839,  840, 871,  872, 903,  904, 935,  936, 967,
  968, 999,  8,   8,    9,   40,   41,  72,   73,  104,  105, 136,  137, 168,
  169, 200,  201, 232,  233, 264,  265, 296,  297, 328,  329, 360,  361, 392,
  393, 424,  425, 456,  457, 488,  489, 520,  521, 552,  553, 584,  585, 616,
  617, 648,  649, 680,  681, 712,  713, 744,  745, 776,  777, 808,  809, 840,
  841, 872,  873, 904,  905, 936,  937, 968,  969, 1000, 9,   9,    10,  41,
  42,  73,   74,  105,  106, 137,  138, 169,  170, 201,  202, 233,  234, 265,
  266, 297,  298, 329,  330, 361,  362, 393,  394, 425,  426, 457,  458, 489,
  490, 521,  522, 553,  554, 585,  586, 617,  618, 649,  650, 681,  682, 713,
  714, 745,  746, 777,  778, 809,  810, 841,  842, 873,  874, 905,  906, 937,
  938, 969,  970, 1001, 10,  10,   11,  42,   43,  74,   75,  106,  107, 138,
  139, 170,  171, 202,  203, 234,  235, 266,  267, 298,  299, 330,  331, 362,
  363, 394,  395, 426,  427, 458,  459, 490,  491, 522,  523, 554,  555, 586,
  587, 618,  619, 650,  651, 682,  683, 714,  715, 746,  747, 778,  779, 810,
  811, 842,  843, 874,  875, 906,  907, 938,  939, 970,  971, 1002, 11,  11,
  12,  43,   44,  75,   76,  107,  108, 139,  140, 171,  172, 203,  204, 235,
  236, 267,  268, 299,  300, 331,  332, 363,  364, 395,  396, 427,  428, 459,
  460, 491,  492, 523,  524, 555,  556, 587,  588, 619,  620, 651,  652, 683,
  684, 715,  716, 747,  748, 779,  780, 811,  812, 843,  844, 875,  876, 907,
  908, 939,  940, 971,  972, 1003, 12,  12,   13,  44,   45,  76,   77,  108,
  109, 140,  141, 172,  173, 204,  205, 236,  237, 268,  269, 300,  301, 332,
  333, 364,  365, 396,  397, 428,  429, 460,  461, 492,  493, 524,  525, 556,
  557, 588,  589, 620,  621, 652,  653, 684,  685, 716,  717, 748,  749, 780,
  781, 812,  813, 844,  845, 876,  877, 908,  909, 940,  941, 972,  973, 1004,
  13,  13,   14,  45,   46,  77,   78,  109,  110, 141,  142, 173,  174, 205,
  206, 237,  238, 269,  270, 301,  302, 333,  334, 365,  366, 397,  398, 429,
  430, 461,  462, 493,  494, 525,  526, 557,  558, 589,  590, 621,  622, 653,
  654, 685,  686, 717,  718, 749,  750, 781,  782, 813,  814, 845,  846, 877,
  878, 909,  910, 941,  942, 973,  974, 1005, 14,  14,   15,  46,   47,  78,
  79,  110,  111, 142,  143, 174,  175, 206,  207, 238,  239, 270,  271, 302,
  303, 334,  335, 366,  367, 398,  399, 430,  431, 462,  463, 494,  495, 526,
  527, 558,  559, 590,  591, 622,  623, 654,  655, 686,  687, 718,  719, 750,
  751, 782,  783, 814,  815, 846,  847, 878,  879, 910,  911, 942,  943, 974,
  975, 1006, 15,  15,   16,  47,   48,  79,   80,  111,  112, 143,  144, 175,
  176, 207,  208, 239,  240, 271,  272, 303,  304, 335,  336, 367,  368, 399,
  400, 431,  432, 463,  464, 495,  496, 527,  528, 559,  560, 591,  592, 623,
  624, 655,  656, 687,  688, 719,  720, 751,  752, 783,  784, 815,  816, 847,
  848, 879,  880, 911,  912, 943,  944, 975,  976, 1007, 16,  16,   17,  48,
  49,  80,   81,  112,  113, 144,  145, 176,  177, 208,  209, 240,  241, 272,
  273, 304,  305, 336,  337, 368,  369, 400,  401, 432,  433, 464,  465, 496,
  497, 528,  529, 560,  561, 592,  593, 624,  625, 656,  657, 688,  689, 720,
  721, 752,  753, 784,  785, 816,  817, 848,  849, 880,  881, 912,  913, 944,
  945, 976,  977, 1008, 17,  17,   18,  49,   50,  81,   82,  113,  114, 145,
  146, 177,  178, 209,  210, 241,  242, 273,  274, 305,  306, 337,  338, 369,
  370, 401,  402, 433,  434, 465,  466, 497,  498, 529,  530, 561,  562, 593,
  594, 625,  626, 657,  658, 689,  690, 721,  722, 753,  754, 785,  786, 817,
  818, 849,  850, 881,  882, 913,  914, 945,  946, 977,  978, 1009, 18,  18,
  19,  50,   51,  82,   83,  114,  115, 146,  147, 178,  179, 210,  211, 242,
  243, 274,  275, 306,  307, 338,  339, 370,  371, 402,  403, 434,  435, 466,
  467, 498,  499, 530,  531, 562,  563, 594,  595, 626,  627, 658,  659, 690,
  691, 722,  723, 754,  755, 786,  787, 818,  819, 850,  851, 882,  883, 914,
  915, 946,  947, 978,  979, 1010, 19,  19,   20,  51,   52,  83,   84,  115,
  116, 147,  148, 179,  180, 211,  212, 243,  244, 275,  276, 307,  308, 339,
  340, 371,  372, 403,  404, 435,  436, 467,  468, 499,  500, 531,  532, 563,
  564, 595,  596, 627,  628, 659,  660, 691,  692, 723,  724, 755,  756, 787,
  788, 819,  820, 851,  852, 883,  884, 915,  916, 947,  948, 979,  980, 1011,
  20,  20,   21,  52,   53,  84,   85,  116,  117, 148,  149, 180,  181, 212,
  213, 244,  245, 276,  277, 308,  309, 340,  341, 372,  373, 404,  405, 436,
  437, 468,  469, 500,  501, 532,  533, 564,  565, 596,  597, 628,  629, 660,
  661, 692,  693, 724,  725, 756,  757, 788,  789, 820,  821, 852,  853, 884,
  885, 916,  917, 948,  949, 980,  981, 1012, 21,  21,   22,  53,   54,  85,
  86,  117,  118, 149,  150, 181,  182, 213,  214, 245,  246, 277,  278, 309,
  310, 341,  342, 373,  374, 405,  406, 437,  438, 469,  470, 501,  502, 533,
  534, 565,  566, 597,  598, 629,  630, 661,  662, 693,  694, 725,  726, 757,
  758, 789,  790, 821,  822, 853,  854, 885,  886, 917,  918, 949,  950, 981,
  982, 1013, 22,  22,   23,  54,   55,  86,   87,  118,  119, 150,  151, 182,
  183, 214,  215, 246,  247, 278,  279, 310,  311, 342,  343, 374,  375, 406,
  407, 438,  439, 470,  471, 502,  503, 534,  535, 566,  567, 598,  599, 630,
  631, 662,  663, 694,  695, 726,  727, 758,  759, 790,  791, 822,  823, 854,
  855, 886,  887, 918,  919, 950,  951, 982,  983, 1014, 23,  23,   24,  55,
  56,  87,   88,  119,  120, 151,  152, 183,  184, 215,  216, 247,  248, 279,
  280, 311,  312, 343,  344, 375,  376, 407,  408, 439,  440, 471,  472, 503,
  504, 535,  536, 567,  568, 599,  600, 631,  632, 663,  664, 695,  696, 727,
  728, 759,  760, 791,  792, 823,  824, 855,  856, 887,  888, 919,  920, 951,
  952, 983,  984, 1015, 24,  24,   25,  56,   57,  88,   89,  120,  121, 152,
  153, 184,  185, 216,  217, 248,  249, 280,  281, 312,  313, 344,  345, 376,
  377, 408,  409, 440,  441, 472,  473, 504,  505, 536,  537, 568,  569, 600,
  601, 632,  633, 664,  665, 696,  697, 728,  729, 760,  761, 792,  793, 824,
  825, 856,  857, 888,  889, 920,  921, 952,  953, 984,  985, 1016, 25,  25,
  26,  57,   58,  89,   90,  121,  122, 153,  154, 185,  186, 217,  218, 249,
  250, 281,  282, 313,  314, 345,  346, 377,  378, 409,  410, 441,  442, 473,
  474, 505,  506, 537,  538, 569,  570, 601,  602, 633,  634, 665,  666, 697,
  698, 729,  730, 761,  762, 793,  794, 825,  826, 857,  858, 889,  890, 921,
  922, 953,  954, 985,  986, 1017, 26,  26,   27,  58,   59,  90,   91,  122,
  123, 154,  155, 186,  187, 218,  219, 250,  251, 282,  283, 314,  315, 346,
  347, 378,  379, 410,  411, 442,  443, 474,  475, 506,  507, 538,  539, 570,
  571, 602,  603, 634,  635, 666,  667, 698,  699, 730,  731, 762,  763, 794,
  795, 826,  827, 858,  859, 890,  891, 922,  923, 954,  955, 986,  987, 1018,
  27,  27,   28,  59,   60,  91,   92,  123,  124, 155,  156, 187,  188, 219,
  220, 251,  252, 283,  284, 315,  316, 347,  348, 379,  380, 411,  412, 443,
  444, 475,  476, 507,  508, 539,  540, 571,  572, 603,  604, 635,  636, 667,
  668, 699,  700, 731,  732, 763,  764, 795,  796, 827,  828, 859,  860, 891,
  892, 923,  924, 955,  956, 987,  988, 1019, 28,  28,   29,  60,   61,  92,
  93,  124,  125, 156,  157, 188,  189, 220,  221, 252,  253, 284,  285, 316,
  317, 348,  349, 380,  381, 412,  413, 444,  445, 476,  477, 508,  509, 540,
  541, 572,  573, 604,  605, 636,  637, 668,  669, 700,  701, 732,  733, 764,
  765, 796,  797, 828,  829, 860,  861, 892,  893, 924,  925, 956,  957, 988,
  989, 1020, 29,  29,   30,  61,   62,  93,   94,  125,  126, 157,  158, 189,
  190, 221,  222, 253,  254, 285,  286, 317,  318, 349,  350, 381,  382, 413,
  414, 445,  446, 477,  478, 509,  510, 541,  542, 573,  574, 605,  606, 637,
  638, 669,  670, 701,  702, 733,  734, 765,  766, 797,  798, 829,  830, 861,
  862, 893,  894, 925,  926, 957,  958, 989,  990, 1021, 30,  30,   31,  62,
  63,  94,   95,  126,  127, 158,  159, 190,  191, 222,  223, 254,  255, 286,
  287, 318,  319, 350,  351, 382,  383, 414,  415, 446,  447, 478,  479, 510,
  511, 542,  543, 574,  575, 606,  607, 638,  639, 670,  671, 702,  703, 734,
  735, 766,  767, 798,  799, 830,  831, 862,  863, 894,  895, 926,  927, 958,
  959, 990,  991, 1022, 0,   0,
};

DECLARE_ALIGNED(16, static const int16_t,
                mrow_scan_32x32_neighbors[1025 * MAX_NEIGHBORS]) = {
  0,   0,    0,   0,    1,   1,    2,   2,    3,   3,    4,   4,    5,   5,
  6,   6,    7,   7,    8,   8,    9,   9,    10,  10,   11,  11,   12,  12,
  13,  13,   14,  14,   15,  15,   16,  16,   17,  17,   18,  18,   19,  19,
  20,  20,   21,  21,   22,  22,   23,  23,   24,  24,   25,  25,   26,  26,
  27,  27,   28,  28,   29,  29,   30,  30,   0,   0,    1,   32,   2,   33,
  3,   34,   4,   35,   5,   36,   6,   37,   7,   38,   8,   39,   9,   40,
  10,  41,   11,  42,   12,  43,   13,  44,   14,  45,   15,  46,   16,  47,
  17,  48,   18,  49,   19,  50,   20,  51,   21,  52,   22,  53,   23,  54,
  24,  55,   25,  56,   26,  57,   27,  58,   28,  59,   29,  60,   30,  61,
  31,  62,   32,  32,   33,  64,   34,  65,   35,  66,   36,  67,   37,  68,
  38,  69,   39,  70,   40,  71,   41,  72,   42,  73,   43,  74,   44,  75,
  45,  76,   46,  77,   47,  78,   48,  79,   49,  80,   50,  81,   51,  82,
  52,  83,   53,  84,   54,  85,   55,  86,   56,  87,   57,  88,   58,  89,
  59,  90,   60,  91,   61,  92,   62,  93,   63,  94,   64,  64,   65,  96,
  66,  97,   67,  98,   68,  99,   69,  100,  70,  101,  71,  102,  72,  103,
  73,  104,  74,  105,  75,  106,  76,  107,  77,  108,  78,  109,  79,  110,
  80,  111,  81,  112,  82,  113,  83,  114,  84,  115,  85,  116,  86,  117,
  87,  118,  88,  119,  89,  120,  90,  121,  91,  122,  92,  123,  93,  124,
  94,  125,  95,  126,  96,  96,   97,  128,  98,  129,  99,  130,  100, 131,
  101, 132,  102, 133,  103, 134,  104, 135,  105, 136,  106, 137,  107, 138,
  108, 139,  109, 140,  110, 141,  111, 142,  112, 143,  113, 144,  114, 145,
  115, 146,  116, 147,  117, 148,  118, 149,  119, 150,  120, 151,  121, 152,
  122, 153,  123, 154,  124, 155,  125, 156,  126, 157,  127, 158,  128, 128,
  129, 160,  130, 161,  131, 162,  132, 163,  133, 164,  134, 165,  135, 166,
  136, 167,  137, 168,  138, 169,  139, 170,  140, 171,  141, 172,  142, 173,
  143, 174,  144, 175,  145, 176,  146, 177,  147, 178,  148, 179,  149, 180,
  150, 181,  151, 182,  152, 183,  153, 184,  154, 185,  155, 186,  156, 187,
  157, 188,  158, 189,  159, 190,  160, 160,  161, 192,  162, 193,  163, 194,
  164, 195,  165, 196,  166, 197,  167, 198,  168, 199,  169, 200,  170, 201,
  171, 202,  172, 203,  173, 204,  174, 205,  175, 206,  176, 207,  177, 208,
  178, 209,  179, 210,  180, 211,  181, 212,  182, 213,  183, 214,  184, 215,
  185, 216,  186, 217,  187, 218,  188, 219,  189, 220,  190, 221,  191, 222,
  192, 192,  193, 224,  194, 225,  195, 226,  196, 227,  197, 228,  198, 229,
  199, 230,  200, 231,  201, 232,  202, 233,  203, 234,  204, 235,  205, 236,
  206, 237,  207, 238,  208, 239,  209, 240,  210, 241,  211, 242,  212, 243,
  213, 244,  214, 245,  215, 246,  216, 247,  217, 248,  218, 249,  219, 250,
  220, 251,  221, 252,  222, 253,  223, 254,  224, 224,  225, 256,  226, 257,
  227, 258,  228, 259,  229, 260,  230, 261,  231, 262,  232, 263,  233, 264,
  234, 265,  235, 266,  236, 267,  237, 268,  238, 269,  239, 270,  240, 271,
  241, 272,  242, 273,  243, 274,  244, 275,  245, 276,  246, 277,  247, 278,
  248, 279,  249, 280,  250, 281,  251, 282,  252, 283,  253, 284,  254, 285,
  255, 286,  256, 256,  257, 288,  258, 289,  259, 290,  260, 291,  261, 292,
  262, 293,  263, 294,  264, 295,  265, 296,  266, 297,  267, 298,  268, 299,
  269, 300,  270, 301,  271, 302,  272, 303,  273, 304,  274, 305,  275, 306,
  276, 307,  277, 308,  278, 309,  279, 310,  280, 311,  281, 312,  282, 313,
  283, 314,  284, 315,  285, 316,  286, 317,  287, 318,  288, 288,  289, 320,
  290, 321,  291, 322,  292, 323,  293, 324,  294, 325,  295, 326,  296, 327,
  297, 328,  298, 329,  299, 330,  300, 331,  301, 332,  302, 333,  303, 334,
  304, 335,  305, 336,  306, 337,  307, 338,  308, 339,  309, 340,  310, 341,
  311, 342,  312, 343,  313, 344,  314, 345,  315, 346,  316, 347,  317, 348,
  318, 349,  319, 350,  320, 320,  321, 352,  322, 353,  323, 354,  324, 355,
  325, 356,  326, 357,  327, 358,  328, 359,  329, 360,  330, 361,  331, 362,
  332, 363,  333, 364,  334, 365,  335, 366,  336, 367,  337, 368,  338, 369,
  339, 370,  340, 371,  341, 372,  342, 373,  343, 374,  344, 375,  345, 376,
  346, 377,  347, 378,  348, 379,  349, 380,  350, 381,  351, 382,  352, 352,
  353, 384,  354, 385,  355, 386,  356, 387,  357, 388,  358, 389,  359, 390,
  360, 391,  361, 392,  362, 393,  363, 394,  364, 395,  365, 396,  366, 397,
  367, 398,  368, 399,  369, 400,  370, 401,  371, 402,  372, 403,  373, 404,
  374, 405,  375, 406,  376, 407,  377, 408,  378, 409,  379, 410,  380, 411,
  381, 412,  382, 413,  383, 414,  384, 384,  385, 416,  386, 417,  387, 418,
  388, 419,  389, 420,  390, 421,  391, 422,  392, 423,  393, 424,  394, 425,
  395, 426,  396, 427,  397, 428,  398, 429,  399, 430,  400, 431,  401, 432,
  402, 433,  403, 434,  404, 435,  405, 436,  406, 437,  407, 438,  408, 439,
  409, 440,  410, 441,  411, 442,  412, 443,  413, 444,  414, 445,  415, 446,
  416, 416,  417, 448,  418, 449,  419, 450,  420, 451,  421, 452,  422, 453,
  423, 454,  424, 455,  425, 456,  426, 457,  427, 458,  428, 459,  429, 460,
  430, 461,  431, 462,  432, 463,  433, 464,  434, 465,  435, 466,  436, 467,
  437, 468,  438, 469,  439, 470,  440, 471,  441, 472,  442, 473,  443, 474,
  444, 475,  445, 476,  446, 477,  447, 478,  448, 448,  449, 480,  450, 481,
  451, 482,  452, 483,  453, 484,  454, 485,  455, 486,  456, 487,  457, 488,
  458, 489,  459, 490,  460, 491,  461, 492,  462, 493,  463, 494,  464, 495,
  465, 496,  466, 497,  467, 498,  468, 499,  469, 500,  470, 501,  471, 502,
  472, 503,  473, 504,  474, 505,  475, 506,  476, 507,  477, 508,  478, 509,
  479, 510,  480, 480,  481, 512,  482, 513,  483, 514,  484, 515,  485, 516,
  486, 517,  487, 518,  488, 519,  489, 520,  490, 521,  491, 522,  492, 523,
  493, 524,  494, 525,  495, 526,  496, 527,  497, 528,  498, 529,  499, 530,
  500, 531,  501, 532,  502, 533,  503, 534,  504, 535,  505, 536,  506, 537,
  507, 538,  508, 539,  509, 540,  510, 541,  511, 542,  512, 512,  513, 544,
  514, 545,  515, 546,  516, 547,  517, 548,  518, 549,  519, 550,  520, 551,
  521, 552,  522, 553,  523, 554,  524, 555,  525, 556,  526, 557,  527, 558,
  528, 559,  529, 560,  530, 561,  531, 562,  532, 563,  533, 564,  534, 565,
  535, 566,  536, 567,  537, 568,  538, 569,  539, 570,  540, 571,  541, 572,
  542, 573,  543, 574,  544, 544,  545, 576,  546, 577,  547, 578,  548, 579,
  549, 580,  550, 581,  551, 582,  552, 583,  553, 584,  554, 585,  555, 586,
  556, 587,  557, 588,  558, 589,  559, 590,  560, 591,  561, 592,  562, 593,
  563, 594,  564, 595,  565, 596,  566, 597,  567, 598,  568, 599,  569, 600,
  570, 601,  571, 602,  572, 603,  573, 604,  574, 605,  575, 606,  576, 576,
  577, 608,  578, 609,  579, 610,  580, 611,  581, 612,  582, 613,  583, 614,
  584, 615,  585, 616,  586, 617,  587, 618,  588, 619,  589, 620,  590, 621,
  591, 622,  592, 623,  593, 624,  594, 625,  595, 626,  596, 627,  597, 628,
  598, 629,  599, 630,  600, 631,  601, 632,  602, 633,  603, 634,  604, 635,
  605, 636,  606, 637,  607, 638,  608, 608,  609, 640,  610, 641,  611, 642,
  612, 643,  613, 644,  614, 645,  615, 646,  616, 647,  617, 648,  618, 649,
  619, 650,  620, 651,  621, 652,  622, 653,  623, 654,  624, 655,  625, 656,
  626, 657,  627, 658,  628, 659,  629, 660,  630, 661,  631, 662,  632, 663,
  633, 664,  634, 665,  635, 666,  636, 667,  637, 668,  638, 669,  639, 670,
  640, 640,  641, 672,  642, 673,  643, 674,  644, 675,  645, 676,  646, 677,
  647, 678,  648, 679,  649, 680,  650, 681,  651, 682,  652, 683,  653, 684,
  654, 685,  655, 686,  656, 687,  657, 688,  658, 689,  659, 690,  660, 691,
  661, 692,  662, 693,  663, 694,  664, 695,  665, 696,  666, 697,  667, 698,
  668, 699,  669, 700,  670, 701,  671, 702,  672, 672,  673, 704,  674, 705,
  675, 706,  676, 707,  677, 708,  678, 709,  679, 710,  680, 711,  681, 712,
  682, 713,  683, 714,  684, 715,  685, 716,  686, 717,  687, 718,  688, 719,
  689, 720,  690, 721,  691, 722,  692, 723,  693, 724,  694, 725,  695, 726,
  696, 727,  697, 728,  698, 729,  699, 730,  700, 731,  701, 732,  702, 733,
  703, 734,  704, 704,  705, 736,  706, 737,  707, 738,  708, 739,  709, 740,
  710, 741,  711, 742,  712, 743,  713, 744,  714, 745,  715, 746,  716, 747,
  717, 748,  718, 749,  719, 750,  720, 751,  721, 752,  722, 753,  723, 754,
  724, 755,  725, 756,  726, 757,  727, 758,  728, 759,  729, 760,  730, 761,
  731, 762,  732, 763,  733, 764,  734, 765,  735, 766,  736, 736,  737, 768,
  738, 769,  739, 770,  740, 771,  741, 772,  742, 773,  743, 774,  744, 775,
  745, 776,  746, 777,  747, 778,  748, 779,  749, 780,  750, 781,  751, 782,
  752, 783,  753, 784,  754, 785,  755, 786,  756, 787,  757, 788,  758, 789,
  759, 790,  760, 791,  761, 792,  762, 793,  763, 794,  764, 795,  765, 796,
  766, 797,  767, 798,  768, 768,  769, 800,  770, 801,  771, 802,  772, 803,
  773, 804,  774, 805,  775, 806,  776, 807,  777, 808,  778, 809,  779, 810,
  780, 811,  781, 812,  782, 813,  783, 814,  784, 815,  785, 816,  786, 817,
  787, 818,  788, 819,  789, 820,  790, 821,  791, 822,  792, 823,  793, 824,
  794, 825,  795, 826,  796, 827,  797, 828,  798, 829,  799, 830,  800, 800,
  801, 832,  802, 833,  803, 834,  804, 835,  805, 836,  806, 837,  807, 838,
  808, 839,  809, 840,  810, 841,  811, 842,  812, 843,  813, 844,  814, 845,
  815, 846,  816, 847,  817, 848,  818, 849,  819, 850,  820, 851,  821, 852,
  822, 853,  823, 854,  824, 855,  825, 856,  826, 857,  827, 858,  828, 859,
  829, 860,  830, 861,  831, 862,  832, 832,  833, 864,  834, 865,  835, 866,
  836, 867,  837, 868,  838, 869,  839, 870,  840, 871,  841, 872,  842, 873,
  843, 874,  844, 875,  845, 876,  846, 877,  847, 878,  848, 879,  849, 880,
  850, 881,  851, 882,  852, 883,  853, 884,  854, 885,  855, 886,  856, 887,
  857, 888,  858, 889,  859, 890,  860, 891,  861, 892,  862, 893,  863, 894,
  864, 864,  865, 896,  866, 897,  867, 898,  868, 899,  869, 900,  870, 901,
  871, 902,  872, 903,  873, 904,  874, 905,  875, 906,  876, 907,  877, 908,
  878, 909,  879, 910,  880, 911,  881, 912,  882, 913,  883, 914,  884, 915,
  885, 916,  886, 917,  887, 918,  888, 919,  889, 920,  890, 921,  891, 922,
  892, 923,  893, 924,  894, 925,  895, 926,  896, 896,  897, 928,  898, 929,
  899, 930,  900, 931,  901, 932,  902, 933,  903, 934,  904, 935,  905, 936,
  906, 937,  907, 938,  908, 939,  909, 940,  910, 941,  911, 942,  912, 943,
  913, 944,  914, 945,  915, 946,  916, 947,  917, 948,  918, 949,  919, 950,
  920, 951,  921, 952,  922, 953,  923, 954,  924, 955,  925, 956,  926, 957,
  927, 958,  928, 928,  929, 960,  930, 961,  931, 962,  932, 963,  933, 964,
  934, 965,  935, 966,  936, 967,  937, 968,  938, 969,  939, 970,  940, 971,
  941, 972,  942, 973,  943, 974,  944, 975,  945, 976,  946, 977,  947, 978,
  948, 979,  949, 980,  950, 981,  951, 982,  952, 983,  953, 984,  954, 985,
  955, 986,  956, 987,  957, 988,  958, 989,  959, 990,  960, 960,  961, 992,
  962, 993,  963, 994,  964, 995,  965, 996,  966, 997,  967, 998,  968, 999,
  969, 1000, 970, 1001, 971, 1002, 972, 1003, 973, 1004, 974, 1005, 975, 1006,
  976, 1007, 977, 1008, 978, 1009, 979, 1010, 980, 1011, 981, 1012, 982, 1013,
  983, 1014, 984, 1015, 985, 1016, 986, 1017, 987, 1018, 988, 1019, 989, 1020,
  990, 1021, 991, 1022, 0,   0,
};
#endif  // CONFIG_EXT_TX

DECLARE_ALIGNED(16, static const int16_t,
                default_scan_32x32_neighbors[1025 * MAX_NEIGHBORS]) = {
  0,   0,    0,   0,    32,  0,    32,  32,   1,   32,  33,  1,    64,  64,
  33,  64,   2,   33,   96,  96,   34,  2,    65,  96,  34,  65,   128, 128,
  97,  128,  3,   34,   66,  97,   35,  3,    35,  66,  98,  129,  129, 160,
  160, 161,  4,   35,   67,  98,   192, 192,  36,  4,   130, 161,  161, 192,
  36,  67,   99,  130,  5,   36,   68,  99,   193, 224, 162, 193,  224, 225,
  131, 162,  37,  68,   100, 131,  37,  5,    194, 225, 225, 256,  256, 257,
  163, 194,  69,  100,  132, 163,  6,   37,   226, 257, 38,  6,    195, 226,
  257, 288,  101, 132,  288, 289,  38,  69,   164, 195, 133, 164,  258, 289,
  227, 258,  196, 227,  7,   38,   289, 320,  70,  101, 320, 321,  39,  7,
  165, 196,  39,  70,   102, 133,  290, 321,  259, 290, 228, 259,  321, 352,
  352, 353,  197, 228,  134, 165,  71,  102,  8,   39,  322, 353,  291, 322,
  260, 291,  103, 134,  353, 384,  166, 197,  229, 260, 40,  71,   40,  8,
  384, 385,  135, 166,  354, 385,  323, 354,  198, 229, 292, 323,  72,  103,
  261, 292,  9,   40,   385, 416,  167, 198,  104, 135, 230, 261,  355, 386,
  416, 417,  293, 324,  324, 355,  41,  9,    41,  72,  386, 417,  199, 230,
  136, 167,  417, 448,  262, 293,  356, 387,  73,  104, 387, 418,  231, 262,
  10,  41,   168, 199,  325, 356,  418, 449,  105, 136, 448, 449,  42,  73,
  294, 325,  200, 231,  42,  10,   357, 388,  137, 168, 263, 294,  388, 419,
  74,  105,  419, 450,  449, 480,  326, 357,  232, 263, 295, 326,  169, 200,
  11,  42,   106, 137,  480, 481,  450, 481,  358, 389, 264, 295,  201, 232,
  138, 169,  389, 420,  43,  74,   420, 451,  327, 358, 43,  11,   481, 512,
  233, 264,  451, 482,  296, 327,  75,  106,  170, 201, 482, 513,  512, 513,
  390, 421,  359, 390,  421, 452,  107, 138,  12,  43,  202, 233,  452, 483,
  265, 296,  328, 359,  139, 170,  44,  75,   483, 514, 513, 544,  234, 265,
  297, 328,  422, 453,  44,  12,   391, 422,  171, 202, 76,  107,  514, 545,
  453, 484,  544, 545,  266, 297,  203, 234,  108, 139, 329, 360,  298, 329,
  140, 171,  515, 546,  13,  44,   423, 454,  235, 266, 545, 576,  454, 485,
  45,  76,   172, 203,  330, 361,  576, 577,  45,  13,  267, 298,  546, 577,
  77,  108,  204, 235,  455, 486,  577, 608,  299, 330, 109, 140,  547, 578,
  14,  45,   46,  14,   141, 172,  578, 609,  331, 362, 46,  77,   173, 204,
  15,  15,   78,  109,  205, 236,  579, 610,  110, 141, 15,  46,   142, 173,
  47,  78,   174, 205,  16,  16,   79,  110,  206, 237, 16,  47,   111, 142,
  48,  79,   143, 174,  80,  111,  175, 206,  17,  48,  49,  17,   207, 238,
  49,  80,   81,  112,  18,  18,   18,  49,   50,  81,  82,  113,  19,  50,
  51,  82,   83,  114,  608, 609,  484, 515,  360, 391, 236, 267,  112, 143,
  51,  19,   640, 640,  609, 640,  516, 547,  485, 516, 392, 423,  361, 392,
  268, 299,  237, 268,  144, 175,  113, 144,  20,  51,  52,  20,   672, 672,
  641, 672,  610, 641,  548, 579,  517, 548,  486, 517, 424, 455,  393, 424,
  362, 393,  300, 331,  269, 300,  238, 269,  176, 207, 145, 176,  114, 145,
  52,  83,   21,  52,   53,  21,   704, 704,  673, 704, 642, 673,  611, 642,
  580, 611,  549, 580,  518, 549,  487, 518,  456, 487, 425, 456,  394, 425,
  363, 394,  332, 363,  301, 332,  270, 301,  239, 270, 208, 239,  177, 208,
  146, 177,  115, 146,  84,  115,  53,  84,   22,  53,  54,  22,   705, 736,
  674, 705,  643, 674,  581, 612,  550, 581,  519, 550, 457, 488,  426, 457,
  395, 426,  333, 364,  302, 333,  271, 302,  209, 240, 178, 209,  147, 178,
  85,  116,  54,  85,   23,  54,   706, 737,  675, 706, 582, 613,  551, 582,
  458, 489,  427, 458,  334, 365,  303, 334,  210, 241, 179, 210,  86,  117,
  55,  86,   707, 738,  583, 614,  459, 490,  335, 366, 211, 242,  87,  118,
  736, 737,  612, 643,  488, 519,  364, 395,  240, 271, 116, 147,  55,  23,
  768, 768,  737, 768,  644, 675,  613, 644,  520, 551, 489, 520,  396, 427,
  365, 396,  272, 303,  241, 272,  148, 179,  117, 148, 24,  55,   56,  24,
  800, 800,  769, 800,  738, 769,  676, 707,  645, 676, 614, 645,  552, 583,
  521, 552,  490, 521,  428, 459,  397, 428,  366, 397, 304, 335,  273, 304,
  242, 273,  180, 211,  149, 180,  118, 149,  56,  87,  25,  56,   57,  25,
  832, 832,  801, 832,  770, 801,  739, 770,  708, 739, 677, 708,  646, 677,
  615, 646,  584, 615,  553, 584,  522, 553,  491, 522, 460, 491,  429, 460,
  398, 429,  367, 398,  336, 367,  305, 336,  274, 305, 243, 274,  212, 243,
  181, 212,  150, 181,  119, 150,  88,  119,  57,  88,  26,  57,   58,  26,
  833, 864,  802, 833,  771, 802,  709, 740,  678, 709, 647, 678,  585, 616,
  554, 585,  523, 554,  461, 492,  430, 461,  399, 430, 337, 368,  306, 337,
  275, 306,  213, 244,  182, 213,  151, 182,  89,  120, 58,  89,   27,  58,
  834, 865,  803, 834,  710, 741,  679, 710,  586, 617, 555, 586,  462, 493,
  431, 462,  338, 369,  307, 338,  214, 245,  183, 214, 90,  121,  59,  90,
  835, 866,  711, 742,  587, 618,  463, 494,  339, 370, 215, 246,  91,  122,
  864, 865,  740, 771,  616, 647,  492, 523,  368, 399, 244, 275,  120, 151,
  59,  27,   896, 896,  865, 896,  772, 803,  741, 772, 648, 679,  617, 648,
  524, 555,  493, 524,  400, 431,  369, 400,  276, 307, 245, 276,  152, 183,
  121, 152,  28,  59,   60,  28,   928, 928,  897, 928, 866, 897,  804, 835,
  773, 804,  742, 773,  680, 711,  649, 680,  618, 649, 556, 587,  525, 556,
  494, 525,  432, 463,  401, 432,  370, 401,  308, 339, 277, 308,  246, 277,
  184, 215,  153, 184,  122, 153,  60,  91,   29,  60,  61,  29,   960, 960,
  929, 960,  898, 929,  867, 898,  836, 867,  805, 836, 774, 805,  743, 774,
  712, 743,  681, 712,  650, 681,  619, 650,  588, 619, 557, 588,  526, 557,
  495, 526,  464, 495,  433, 464,  402, 433,  371, 402, 340, 371,  309, 340,
  278, 309,  247, 278,  216, 247,  185, 216,  154, 185, 123, 154,  92,  123,
  61,  92,   30,  61,   62,  30,   961, 992,  930, 961, 899, 930,  837, 868,
  806, 837,  775, 806,  713, 744,  682, 713,  651, 682, 589, 620,  558, 589,
  527, 558,  465, 496,  434, 465,  403, 434,  341, 372, 310, 341,  279, 310,
  217, 248,  186, 217,  155, 186,  93,  124,  62,  93,  31,  62,   962, 993,
  931, 962,  838, 869,  807, 838,  714, 745,  683, 714, 590, 621,  559, 590,
  466, 497,  435, 466,  342, 373,  311, 342,  218, 249, 187, 218,  94,  125,
  63,  94,   963, 994,  839, 870,  715, 746,  591, 622, 467, 498,  343, 374,
  219, 250,  95,  126,  868, 899,  744, 775,  620, 651, 496, 527,  372, 403,
  248, 279,  124, 155,  900, 931,  869, 900,  776, 807, 745, 776,  652, 683,
  621, 652,  528, 559,  497, 528,  404, 435,  373, 404, 280, 311,  249, 280,
  156, 187,  125, 156,  932, 963,  901, 932,  870, 901, 808, 839,  777, 808,
  746, 777,  684, 715,  653, 684,  622, 653,  560, 591, 529, 560,  498, 529,
  436, 467,  405, 436,  374, 405,  312, 343,  281, 312, 250, 281,  188, 219,
  157, 188,  126, 157,  964, 995,  933, 964,  902, 933, 871, 902,  840, 871,
  809, 840,  778, 809,  747, 778,  716, 747,  685, 716, 654, 685,  623, 654,
  592, 623,  561, 592,  530, 561,  499, 530,  468, 499, 437, 468,  406, 437,
  375, 406,  344, 375,  313, 344,  282, 313,  251, 282, 220, 251,  189, 220,
  158, 189,  127, 158,  965, 996,  934, 965,  903, 934, 841, 872,  810, 841,
  779, 810,  717, 748,  686, 717,  655, 686,  593, 624, 562, 593,  531, 562,
  469, 500,  438, 469,  407, 438,  345, 376,  314, 345, 283, 314,  221, 252,
  190, 221,  159, 190,  966, 997,  935, 966,  842, 873, 811, 842,  718, 749,
  687, 718,  594, 625,  563, 594,  470, 501,  439, 470, 346, 377,  315, 346,
  222, 253,  191, 222,  967, 998,  843, 874,  719, 750, 595, 626,  471, 502,
  347, 378,  223, 254,  872, 903,  748, 779,  624, 655, 500, 531,  376, 407,
  252, 283,  904, 935,  873, 904,  780, 811,  749, 780, 656, 687,  625, 656,
  532, 563,  501, 532,  408, 439,  377, 408,  284, 315, 253, 284,  936, 967,
  905, 936,  874, 905,  812, 843,  781, 812,  750, 781, 688, 719,  657, 688,
  626, 657,  564, 595,  533, 564,  502, 533,  440, 471, 409, 440,  378, 409,
  316, 347,  285, 316,  254, 285,  968, 999,  937, 968, 906, 937,  875, 906,
  844, 875,  813, 844,  782, 813,  751, 782,  720, 751, 689, 720,  658, 689,
  627, 658,  596, 627,  565, 596,  534, 565,  503, 534, 472, 503,  441, 472,
  410, 441,  379, 410,  348, 379,  317, 348,  286, 317, 255, 286,  969, 1000,
  938, 969,  907, 938,  845, 876,  814, 845,  783, 814, 721, 752,  690, 721,
  659, 690,  597, 628,  566, 597,  535, 566,  473, 504, 442, 473,  411, 442,
  349, 380,  318, 349,  287, 318,  970, 1001, 939, 970, 846, 877,  815, 846,
  722, 753,  691, 722,  598, 629,  567, 598,  474, 505, 443, 474,  350, 381,
  319, 350,  971, 1002, 847, 878,  723, 754,  599, 630, 475, 506,  351, 382,
  876, 907,  752, 783,  628, 659,  504, 535,  380, 411, 908, 939,  877, 908,
  784, 815,  753, 784,  660, 691,  629, 660,  536, 567, 505, 536,  412, 443,
  381, 412,  940, 971,  909, 940,  878, 909,  816, 847, 785, 816,  754, 785,
  692, 723,  661, 692,  630, 661,  568, 599,  537, 568, 506, 537,  444, 475,
  413, 444,  382, 413,  972, 1003, 941, 972,  910, 941, 879, 910,  848, 879,
  817, 848,  786, 817,  755, 786,  724, 755,  693, 724, 662, 693,  631, 662,
  600, 631,  569, 600,  538, 569,  507, 538,  476, 507, 445, 476,  414, 445,
  383, 414,  973, 1004, 942, 973,  911, 942,  849, 880, 818, 849,  787, 818,
  725, 756,  694, 725,  663, 694,  601, 632,  570, 601, 539, 570,  477, 508,
  446, 477,  415, 446,  974, 1005, 943, 974,  850, 881, 819, 850,  726, 757,
  695, 726,  602, 633,  571, 602,  478, 509,  447, 478, 975, 1006, 851, 882,
  727, 758,  603, 634,  479, 510,  880, 911,  756, 787, 632, 663,  508, 539,
  912, 943,  881, 912,  788, 819,  757, 788,  664, 695, 633, 664,  540, 571,
  509, 540,  944, 975,  913, 944,  882, 913,  820, 851, 789, 820,  758, 789,
  696, 727,  665, 696,  634, 665,  572, 603,  541, 572, 510, 541,  976, 1007,
  945, 976,  914, 945,  883, 914,  852, 883,  821, 852, 790, 821,  759, 790,
  728, 759,  697, 728,  666, 697,  635, 666,  604, 635, 573, 604,  542, 573,
  511, 542,  977, 1008, 946, 977,  915, 946,  853, 884, 822, 853,  791, 822,
  729, 760,  698, 729,  667, 698,  605, 636,  574, 605, 543, 574,  978, 1009,
  947, 978,  854, 885,  823, 854,  730, 761,  699, 730, 606, 637,  575, 606,
  979, 1010, 855, 886,  731, 762,  607, 638,  884, 915, 760, 791,  636, 667,
  916, 947,  885, 916,  792, 823,  761, 792,  668, 699, 637, 668,  948, 979,
  917, 948,  886, 917,  824, 855,  793, 824,  762, 793, 700, 731,  669, 700,
  638, 669,  980, 1011, 949, 980,  918, 949,  887, 918, 856, 887,  825, 856,
  794, 825,  763, 794,  732, 763,  701, 732,  670, 701, 639, 670,  981, 1012,
  950, 981,  919, 950,  857, 888,  826, 857,  795, 826, 733, 764,  702, 733,
  671, 702,  982, 1013, 951, 982,  858, 889,  827, 858, 734, 765,  703, 734,
  983, 1014, 859, 890,  735, 766,  888, 919,  764, 795, 920, 951,  889, 920,
  796, 827,  765, 796,  952, 983,  921, 952,  890, 921, 828, 859,  797, 828,
  766, 797,  984, 1015, 953, 984,  922, 953,  891, 922, 860, 891,  829, 860,
  798, 829,  767, 798,  985, 1016, 954, 985,  923, 954, 861, 892,  830, 861,
  799, 830,  986, 1017, 955, 986,  862, 893,  831, 862, 987, 1018, 863, 894,
  892, 923,  924, 955,  893, 924,  956, 987,  925, 956, 894, 925,  988, 1019,
  957, 988,  926, 957,  895, 926,  989, 1020, 958, 989, 927, 958,  990, 1021,
  959, 990,  991, 1022, 0,   0,
};

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t,
                v2_scan_32x32_neighbors[1025 * MAX_NEIGHBORS]) = {
  0,   0,    0,   0,    0,   0,    1,   32,   1,   1,   32,  32,   2,   33,
  33,  64,   34,  65,   2,   2,    64,  64,   3,   34,  65,  96,   35,  66,
  66,  97,   3,   3,    96,  96,   4,   35,   97,  128, 67,  98,   36,  67,
  98,  129,  4,   4,    68,  99,   99,  130,  128, 128, 5,   36,   129, 160,
  37,  68,   130, 161,  100, 131,  69,  100,  131, 162, 5,   5,    160, 160,
  6,   37,   161, 192,  38,  69,   162, 193,  101, 132, 132, 163,  70,  101,
  163, 194,  6,   6,    192, 192,  7,   38,   133, 164, 193, 224,  102, 133,
  164, 195,  39,  70,   194, 225,  71,  102,  195, 226, 134, 165,  165, 196,
  7,   7,    224, 224,  8,   39,   103, 134,  196, 227, 225, 256,  40,  71,
  226, 257,  166, 197,  72,  103,  227, 258,  135, 166, 197, 228,  104, 135,
  228, 259,  8,   8,    256, 256,  9,   40,   257, 288, 41,  72,   167, 198,
  198, 229,  258, 289,  136, 167,  229, 260,  73,  104, 259, 290,  105, 136,
  260, 291,  199, 230,  9,   9,    168, 199,  230, 261, 288, 288,  10,  41,
  289, 320,  42,  73,   290, 321,  137, 168,  261, 292, 74,  105,  291, 322,
  200, 231,  231, 262,  106, 137,  292, 323,  169, 200, 262, 293,  10,  10,
  320, 320,  11,  42,   321, 352,  43,  74,   138, 169, 293, 324,  322, 353,
  232, 263,  75,  106,  201, 232,  263, 294,  323, 354, 170, 201,  294, 325,
  107, 138,  324, 355,  11,  11,   352, 352,  12,  43,  233, 264,  264, 295,
  353, 384,  139, 170,  325, 356,  44,  75,   354, 385, 202, 233,  295, 326,
  76,  107,  355, 386,  171, 202,  326, 357,  108, 139, 356, 387,  265, 296,
  234, 265,  296, 327,  12,  12,   140, 171,  357, 388, 384, 384,  13,  44,
  203, 234,  327, 358,  385, 416,  45,  76,   386, 417, 77,  108,  387, 418,
  172, 203,  358, 389,  266, 297,  297, 328,  109, 140, 235, 266,  328, 359,
  388, 419,  204, 235,  359, 390,  141, 172,  389, 420, 13,  13,   416, 416,
  14,  45,   417, 448,  46,  77,   298, 329,  418, 449, 267, 298,  329, 360,
  78,  109,  173, 204,  390, 421,  419, 450,  236, 267, 360, 391,  110, 141,
  420, 451,  205, 236,  391, 422,  142, 173,  299, 330, 330, 361,  421, 452,
  14,  14,   268, 299,  361, 392,  448, 448,  15,  46,  449, 480,  47,  78,
  450, 481,  174, 205,  422, 453,  237, 268,  392, 423, 79,  110,  451, 482,
  111, 142,  452, 483,  331, 362,  300, 331,  362, 393, 206, 237,  423, 454,
  143, 174,  269, 300,  393, 424,  453, 484,  480, 480, 481, 512,  238, 269,
  424, 455,  482, 513,  175, 206,  454, 485,  332, 363, 363, 394,  483, 514,
  301, 332,  394, 425,  484, 515,  207, 238,  455, 486, 270, 301,  425, 456,
  485, 516,  364, 395,  239, 270,  456, 487,  512, 512, 333, 364,  395, 426,
  513, 544,  486, 517,  514, 545,  302, 333,  426, 457, 515, 546,  487, 518,
  516, 547,  271, 302,  457, 488,  365, 396,  396, 427, 517, 548,  334, 365,
  427, 458,  488, 519,  544, 544,  303, 334,  458, 489, 518, 549,  545, 576,
  546, 577,  547, 578,  489, 520,  397, 428,  519, 550, 366, 397,  428, 459,
  548, 579,  335, 366,  459, 490,  549, 580,  520, 551, 490, 521,  550, 581,
  576, 576,  577, 608,  398, 429,  429, 460,  578, 609, 367, 398,  460, 491,
  521, 552,  579, 610,  551, 582,  491, 522,  580, 611, 581, 612,  552, 583,
  522, 553,  430, 461,  399, 430,  461, 492,  582, 613, 492, 523,  608, 608,
  609, 640,  610, 641,  553, 584,  611, 642,  523, 554, 583, 614,  612, 643,
  431, 462,  462, 493,  554, 585,  493, 524,  584, 615, 613, 644,  524, 555,
  614, 645,  640, 640,  585, 616,  641, 672,  555, 586, 642, 673,  615, 646,
  463, 494,  643, 674,  494, 525,  644, 675,  525, 556, 586, 617,  616, 647,
  645, 676,  556, 587,  646, 677,  495, 526,  617, 648, 587, 618,  672, 672,
  526, 557,  673, 704,  674, 705,  647, 678,  557, 588, 675, 706,  618, 649,
  676, 707,  588, 619,  648, 679,  677, 708,  527, 558, 558, 589,  678, 709,
  619, 650,  649, 680,  704, 704,  589, 620,  705, 736, 679, 710,  706, 737,
  707, 738,  650, 681,  620, 651,  708, 739,  680, 711, 559, 590,  709, 740,
  590, 621,  651, 682,  681, 712,  710, 741,  621, 652, 736, 736,  737, 768,
  711, 742,  738, 769,  682, 713,  652, 683,  739, 770, 591, 622,  740, 771,
  712, 743,  622, 653,  741, 772,  683, 714,  653, 684, 713, 744,  742, 773,
  623, 654,  743, 774,  768, 768,  769, 800,  684, 715, 714, 745,  770, 801,
  771, 802,  654, 685,  744, 775,  772, 803,  715, 746, 773, 804,  685, 716,
  745, 776,  774, 805,  655, 686,  716, 747,  775, 806, 746, 777,  800, 800,
  801, 832,  686, 717,  802, 833,  803, 834,  776, 807, 804, 835,  747, 778,
  717, 748,  805, 836,  777, 808,  687, 718,  806, 837, 748, 779,  718, 749,
  778, 809,  807, 838,  832, 832,  833, 864,  834, 865, 835, 866,  808, 839,
  749, 780,  836, 867,  779, 810,  719, 750,  837, 868, 809, 840,  838, 869,
  780, 811,  750, 781,  810, 841,  839, 870,  864, 864, 865, 896,  866, 897,
  840, 871,  867, 898,  781, 812,  811, 842,  868, 899, 751, 782,  869, 900,
  841, 872,  812, 843,  870, 901,  782, 813,  842, 873, 871, 902,  896, 896,
  897, 928,  813, 844,  898, 929,  872, 903,  783, 814, 843, 874,  899, 930,
  900, 931,  873, 904,  901, 932,  814, 845,  844, 875, 902, 933,  874, 905,
  903, 934,  845, 876,  928, 928,  815, 846,  929, 960, 930, 961,  875, 906,
  904, 935,  931, 962,  932, 963,  905, 936,  846, 877, 933, 964,  876, 907,
  934, 965,  906, 937,  935, 966,  877, 908,  847, 878, 960, 960,  907, 938,
  961, 992,  936, 967,  962, 993,  963, 994,  964, 995, 878, 909,  937, 968,
  908, 939,  965, 996,  966, 997,  938, 969,  879, 910, 909, 940,  967, 998,
  939, 970,  968, 999,  910, 941,  969, 1000, 940, 971, 970, 1001, 911, 942,
  941, 972,  971, 1002, 942, 973,  972, 1003, 943, 974, 973, 1004, 974, 1005,
  975, 1006, 15,  15,   16,  47,   48,  79,   80,  111, 112, 143,  144, 175,
  16,  16,   17,  48,   176, 207,  49,  80,   81,  112, 113, 144,  208, 239,
  145, 176,  240, 271,  17,  17,   18,  49,   177, 208, 50,  81,   82,  113,
  272, 303,  209, 240,  114, 145,  146, 177,  241, 272, 304, 335,  178, 209,
  18,  18,   19,  50,   51,  82,   83,  114,  273, 304, 210, 241,  115, 146,
  336, 367,  147, 178,  242, 273,  305, 336,  179, 210, 19,  19,   368, 399,
  20,  51,   52,  83,   274, 305,  84,  115,  211, 242, 337, 368,  116, 147,
  306, 337,  148, 179,  243, 274,  400, 431,  369, 400, 180, 211,  20,  20,
  21,  52,   275, 306,  53,  84,   338, 369,  212, 243, 85,  116,  432, 463,
  117, 148,  401, 432,  307, 338,  244, 275,  149, 180, 370, 401,  181, 212,
  276, 307,  464, 495,  339, 370,  21,  21,   22,  53,  433, 464,  54,  85,
  213, 244,  86,  117,  402, 433,  118, 149,  308, 339, 245, 276,  371, 402,
  150, 181,  496, 527,  465, 496,  182, 213,  434, 465, 340, 371,  277, 308,
  22,  22,   23,  54,   403, 434,  55,  86,   214, 245, 87,  118,  309, 340,
  372, 403,  119, 150,  497, 528,  528, 559,  246, 277, 466, 497,  151, 182,
  435, 466,  341, 372,  183, 214,  278, 309,  404, 435, 23,  23,   24,  55,
  215, 246,  529, 560,  56,  87,   498, 529,  560, 591, 310, 341,  88,  119,
  373, 404,  467, 498,  120, 151,  247, 278,  436, 467, 152, 183,  342, 373,
  279, 310,  405, 436,  184, 215,  530, 561,  561, 592, 499, 530,  592, 623,
  24,  24,   216, 247,  468, 499,  25,  56,   374, 405, 57,  88,   311, 342,
  89,  120,  437, 468,  248, 279,  121, 152,  562, 593, 153, 184,  343, 374,
  531, 562,  593, 624,  406, 437,  500, 531,  624, 655, 280, 311,  185, 216,
  469, 500,  375, 406,  217, 248,  25,  25,   312, 343, 26,  57,   58,  89,
  438, 469,  90,  121,  563, 594,  594, 625,  249, 280, 532, 563,  625, 656,
  122, 153,  344, 375,  501, 532,  656, 687,  407, 438, 154, 185,  281, 312,
  470, 501,  186, 217,  376, 407,  595, 626,  564, 595, 626, 657,  218, 249,
  313, 344,  439, 470,  26,  26,   27,  58,   533, 564, 657, 688,  59,  90,
  91,  122,  250, 281,  502, 533,  688, 719,  123, 154, 408, 439,  345, 376,
  155, 186,  471, 502,  282, 313,  596, 627,  627, 658, 187, 218,  565, 596,
  658, 689,  377, 408,  440, 471,  534, 565,  689, 720, 314, 345,  219, 250,
  27,  27,   28,  59,   503, 534,  720, 751,  60,  91,  92,  123,  251, 282,
  409, 440,  346, 377,  124, 155,  628, 659,  472, 503, 597, 628,  659, 690,
  566, 597,  690, 721,  156, 187,  283, 314,  535, 566, 721, 752,  188, 219,
  378, 409,  441, 472,  315, 346,  504, 535,  752, 783, 220, 251,  28,  28,
  629, 660,  660, 691,  29,  60,   61,  92,   410, 441, 598, 629,  691, 722,
  252, 283,  93,  124,  347, 378,  473, 504,  567, 598, 722, 753,  125, 156,
  284, 315,  536, 567,  753, 784,  157, 188,  442, 473, 379, 410,  189, 220,
  505, 536,  784, 815,  661, 692,  316, 347,  630, 661, 692, 723,  221, 252,
  599, 630,  723, 754,  411, 442,  29,  29,   568, 599, 754, 785,  30,  61,
  474, 505,  62,  93,   253, 284,  348, 379,  94,  125, 537, 568,  785, 816,
  126, 157,  285, 316,  158, 189,  443, 474,  662, 693, 693, 724,  380, 411,
  631, 662,  724, 755,  506, 537,  816, 847,  190, 221, 600, 631,  755, 786,
  317, 348,  222, 253,  569, 600,  786, 817,  412, 443, 475, 506,  30,  30,
  31,  62,   349, 380,  254, 285,  63,  94,   538, 569, 817, 848,  694, 725,
  95,  126,  663, 694,  725, 756,  632, 663,  756, 787, 127, 158,  444, 475,
  286, 317,  381, 412,  507, 538,  848, 879,  159, 190, 601, 632,  787, 818,
  191, 222,  318, 349,  570, 601,  818, 849,  476, 507, 223, 254,  413, 444,
  695, 726,  726, 757,  664, 695,  757, 788,  539, 570, 849, 880,  350, 381,
  255, 286,  633, 664,  788, 819,  445, 476,  602, 633, 819, 850,  508, 539,
  880, 911,  287, 318,  382, 413,  571, 602,  850, 881, 727, 758,  696, 727,
  758, 789,  319, 350,  477, 508,  665, 696,  789, 820, 414, 445,  540, 571,
  881, 912,  634, 665,  820, 851,  351, 382,  603, 634, 851, 882,  446, 477,
  509, 540,  912, 943,  383, 414,  728, 759,  759, 790, 572, 603,  882, 913,
  697, 728,  790, 821,  666, 697,  821, 852,  478, 509, 635, 666,  852, 883,
  415, 446,  541, 572,  913, 944,  604, 635,  883, 914, 760, 791,  729, 760,
  791, 822,  510, 541,  944, 975,  447, 478,  698, 729, 822, 853,  573, 604,
  914, 945,  667, 698,  853, 884,  636, 667,  884, 915, 479, 510,  542, 573,
  945, 976,  761, 792,  792, 823,  605, 636,  915, 946, 730, 761,  823, 854,
  699, 730,  854, 885,  511, 542,  976, 1007, 574, 605, 946, 977,  668, 699,
  885, 916,  637, 668,  916, 947,  543, 574,  793, 824, 977, 1008, 762, 793,
  824, 855,  731, 762,  855, 886,  606, 637,  947, 978, 700, 731,  886, 917,
  669, 700,  917, 948,  575, 606,  978, 1009, 638, 669, 948, 979,  794, 825,
  825, 856,  763, 794,  856, 887,  732, 763,  887, 918, 607, 638,  979, 1010,
  701, 732,  918, 949,  670, 701,  949, 980,  826, 857, 795, 826,  857, 888,
  764, 795,  888, 919,  639, 670,  980, 1011, 733, 764, 919, 950,  702, 733,
  950, 981,  671, 702,  981, 1012, 827, 858,  858, 889, 796, 827,  889, 920,
  765, 796,  920, 951,  734, 765,  951, 982,  703, 734, 982, 1013, 859, 890,
  828, 859,  890, 921,  797, 828,  921, 952,  766, 797, 952, 983,  735, 766,
  983, 1014, 860, 891,  891, 922,  829, 860,  922, 953, 798, 829,  953, 984,
  767, 798,  984, 1015, 892, 923,  861, 892,  923, 954, 830, 861,  954, 985,
  799, 830,  985, 1016, 893, 924,  924, 955,  862, 893, 955, 986,  831, 862,
  986, 1017, 925, 956,  894, 925,  956, 987,  863, 894, 987, 1018, 926, 957,
  957, 988,  895, 926,  988, 1019, 958, 989,  927, 958, 989, 1020, 959, 990,
  990, 1021, 991, 1022, 0,   0,
};

DECLARE_ALIGNED(16, static const int16_t,
                h2_scan_32x32_neighbors[1025 * MAX_NEIGHBORS]) = {
  0,   0,    0,   0,    0,   0,    1,   32,   1,   1,    32,  32,   2,   33,
  33,  64,   34,  65,   2,   2,    64,  64,   3,   34,   65,  96,   35,  66,
  66,  97,   3,   3,    96,  96,   4,   35,   97,  128,  67,  98,   36,  67,
  98,  129,  4,   4,    68,  99,   99,  130,  128, 128,  5,   36,   129, 160,
  37,  68,   130, 161,  100, 131,  69,  100,  131, 162,  5,   5,    160, 160,
  6,   37,   161, 192,  38,  69,   162, 193,  101, 132,  132, 163,  70,  101,
  163, 194,  6,   6,    192, 192,  7,   38,   133, 164,  193, 224,  102, 133,
  164, 195,  39,  70,   194, 225,  71,  102,  195, 226,  134, 165,  165, 196,
  7,   7,    224, 224,  8,   39,   103, 134,  196, 227,  225, 256,  40,  71,
  226, 257,  166, 197,  72,  103,  227, 258,  135, 166,  197, 228,  104, 135,
  228, 259,  8,   8,    256, 256,  9,   40,   257, 288,  41,  72,   167, 198,
  198, 229,  258, 289,  136, 167,  229, 260,  73,  104,  259, 290,  105, 136,
  260, 291,  199, 230,  9,   9,    168, 199,  230, 261,  288, 288,  10,  41,
  289, 320,  42,  73,   290, 321,  137, 168,  261, 292,  74,  105,  291, 322,
  200, 231,  231, 262,  106, 137,  292, 323,  169, 200,  262, 293,  10,  10,
  320, 320,  11,  42,   321, 352,  43,  74,   138, 169,  293, 324,  322, 353,
  232, 263,  75,  106,  201, 232,  263, 294,  323, 354,  170, 201,  294, 325,
  107, 138,  324, 355,  11,  11,   352, 352,  12,  43,   233, 264,  264, 295,
  353, 384,  139, 170,  325, 356,  44,  75,   354, 385,  202, 233,  295, 326,
  76,  107,  355, 386,  171, 202,  326, 357,  108, 139,  356, 387,  265, 296,
  234, 265,  296, 327,  12,  12,   140, 171,  357, 388,  384, 384,  13,  44,
  203, 234,  327, 358,  385, 416,  45,  76,   386, 417,  77,  108,  387, 418,
  172, 203,  358, 389,  266, 297,  297, 328,  109, 140,  235, 266,  328, 359,
  388, 419,  204, 235,  359, 390,  141, 172,  389, 420,  13,  13,   416, 416,
  14,  45,   417, 448,  46,  77,   298, 329,  418, 449,  267, 298,  329, 360,
  78,  109,  173, 204,  390, 421,  419, 450,  236, 267,  360, 391,  110, 141,
  420, 451,  205, 236,  391, 422,  142, 173,  299, 330,  330, 361,  421, 452,
  14,  14,   268, 299,  361, 392,  448, 448,  15,  46,   449, 480,  47,  78,
  450, 481,  174, 205,  422, 453,  237, 268,  392, 423,  79,  110,  451, 482,
  111, 142,  452, 483,  331, 362,  300, 331,  362, 393,  206, 237,  423, 454,
  143, 174,  269, 300,  393, 424,  453, 484,  15,  15,   16,  47,   48,  79,
  238, 269,  424, 455,  175, 206,  454, 485,  80,  111,  332, 363,  363, 394,
  301, 332,  394, 425,  112, 143,  207, 238,  455, 486,  270, 301,  425, 456,
  144, 175,  364, 395,  16,  16,   239, 270,  456, 487,  17,  48,   333, 364,
  395, 426,  176, 207,  49,  80,   302, 333,  426, 457,  81,  112,  113, 144,
  208, 239,  271, 302,  457, 488,  365, 396,  396, 427,  145, 176,  334, 365,
  427, 458,  240, 271,  17,  17,   18,  49,   177, 208,  303, 334,  458, 489,
  50,  81,   82,  113,  272, 303,  209, 240,  397, 428,  114, 145,  366, 397,
  428, 459,  335, 366,  459, 490,  146, 177,  241, 272,  304, 335,  178, 209,
  18,  18,   19,  50,   51,  82,   398, 429,  429, 460,  367, 398,  460, 491,
  83,  114,  273, 304,  210, 241,  115, 146,  336, 367,  147, 178,  242, 273,
  305, 336,  430, 461,  399, 430,  461, 492,  179, 210,  19,  19,   368, 399,
  20,  51,   52,  83,   274, 305,  84,  115,  211, 242,  337, 368,  116, 147,
  431, 462,  462, 493,  306, 337,  148, 179,  243, 274,  400, 431,  369, 400,
  180, 211,  20,  20,   21,  52,   275, 306,  53,  84,   338, 369,  212, 243,
  85,  116,  463, 494,  432, 463,  117, 148,  401, 432,  307, 338,  244, 275,
  149, 180,  370, 401,  181, 212,  276, 307,  464, 495,  339, 370,  21,  21,
  22,  53,   433, 464,  54,  85,   213, 244,  86,  117,  402, 433,  118, 149,
  308, 339,  245, 276,  371, 402,  150, 181,  465, 496,  182, 213,  434, 465,
  340, 371,  277, 308,  22,  22,   23,  54,   403, 434,  55,  86,   214, 245,
  87,  118,  309, 340,  372, 403,  119, 150,  246, 277,  466, 497,  151, 182,
  435, 466,  341, 372,  183, 214,  278, 309,  404, 435,  23,  23,   24,  55,
  215, 246,  56,  87,   310, 341,  88,  119,  373, 404,  467, 498,  120, 151,
  247, 278,  436, 467,  152, 183,  342, 373,  279, 310,  405, 436,  184, 215,
  24,  24,   216, 247,  468, 499,  25,  56,   374, 405,  57,  88,   311, 342,
  89,  120,  437, 468,  248, 279,  121, 152,  153, 184,  343, 374,  406, 437,
  280, 311,  185, 216,  469, 500,  375, 406,  217, 248,  25,  25,   312, 343,
  26,  57,   58,  89,   438, 469,  90,  121,  249, 280,  122, 153,  344, 375,
  407, 438,  154, 185,  281, 312,  470, 501,  186, 217,  376, 407,  218, 249,
  313, 344,  439, 470,  26,  26,   27,  58,   59,  90,   91,  122,  250, 281,
  123, 154,  408, 439,  345, 376,  155, 186,  471, 502,  282, 313,  187, 218,
  377, 408,  440, 471,  314, 345,  219, 250,  27,  27,   28,  59,   60,  91,
  92,  123,  251, 282,  409, 440,  346, 377,  124, 155,  472, 503,  156, 187,
  283, 314,  188, 219,  378, 409,  441, 472,  315, 346,  220, 251,  28,  28,
  29,  60,   61,  92,   410, 441,  252, 283,  93,  124,  347, 378,  473, 504,
  125, 156,  284, 315,  157, 188,  442, 473,  379, 410,  189, 220,  316, 347,
  221, 252,  411, 442,  29,  29,   30,  61,   474, 505,  62,  93,   253, 284,
  348, 379,  94,  125,  126, 157,  285, 316,  158, 189,  443, 474,  380, 411,
  190, 221,  317, 348,  222, 253,  412, 443,  475, 506,  30,  30,   31,  62,
  349, 380,  254, 285,  63,  94,   95,  126,  127, 158,  444, 475,  286, 317,
  381, 412,  159, 190,  191, 222,  318, 349,  476, 507,  223, 254,  413, 444,
  350, 381,  255, 286,  445, 476,  287, 318,  382, 413,  319, 350,  477, 508,
  414, 445,  351, 382,  446, 477,  383, 414,  478, 509,  415, 446,  447, 478,
  479, 510,  480, 480,  481, 512,  482, 513,  483, 514,  484, 515,  485, 516,
  512, 512,  513, 544,  486, 517,  514, 545,  515, 546,  487, 518,  516, 547,
  517, 548,  488, 519,  544, 544,  518, 549,  545, 576,  546, 577,  547, 578,
  489, 520,  519, 550,  548, 579,  549, 580,  520, 551,  490, 521,  550, 581,
  576, 576,  577, 608,  578, 609,  521, 552,  579, 610,  551, 582,  491, 522,
  580, 611,  581, 612,  552, 583,  522, 553,  582, 613,  492, 523,  608, 608,
  609, 640,  610, 641,  553, 584,  611, 642,  523, 554,  583, 614,  612, 643,
  554, 585,  493, 524,  584, 615,  613, 644,  524, 555,  614, 645,  640, 640,
  585, 616,  641, 672,  555, 586,  642, 673,  615, 646,  643, 674,  494, 525,
  644, 675,  525, 556,  586, 617,  616, 647,  645, 676,  556, 587,  646, 677,
  495, 526,  617, 648,  587, 618,  672, 672,  526, 557,  673, 704,  674, 705,
  647, 678,  557, 588,  675, 706,  618, 649,  676, 707,  588, 619,  648, 679,
  677, 708,  496, 527,  527, 558,  558, 589,  678, 709,  619, 650,  649, 680,
  704, 704,  589, 620,  705, 736,  679, 710,  706, 737,  707, 738,  650, 681,
  620, 651,  497, 528,  528, 559,  708, 739,  680, 711,  559, 590,  709, 740,
  590, 621,  651, 682,  681, 712,  710, 741,  621, 652,  736, 736,  737, 768,
  529, 560,  711, 742,  498, 529,  560, 591,  738, 769,  682, 713,  652, 683,
  739, 770,  591, 622,  740, 771,  712, 743,  622, 653,  741, 772,  683, 714,
  653, 684,  713, 744,  742, 773,  530, 561,  561, 592,  499, 530,  592, 623,
  623, 654,  743, 774,  768, 768,  769, 800,  684, 715,  714, 745,  770, 801,
  771, 802,  654, 685,  744, 775,  772, 803,  562, 593,  531, 562,  593, 624,
  715, 746,  773, 804,  685, 716,  500, 531,  624, 655,  745, 776,  774, 805,
  655, 686,  716, 747,  775, 806,  746, 777,  800, 800,  801, 832,  686, 717,
  802, 833,  563, 594,  594, 625,  803, 834,  532, 563,  625, 656,  776, 807,
  804, 835,  501, 532,  656, 687,  747, 778,  717, 748,  805, 836,  777, 808,
  687, 718,  806, 837,  748, 779,  595, 626,  564, 595,  626, 657,  718, 749,
  778, 809,  807, 838,  832, 832,  533, 564,  657, 688,  833, 864,  834, 865,
  835, 866,  502, 533,  688, 719,  808, 839,  749, 780,  836, 867,  779, 810,
  719, 750,  837, 868,  809, 840,  596, 627,  627, 658,  565, 596,  658, 689,
  838, 869,  780, 811,  750, 781,  534, 565,  689, 720,  810, 841,  839, 870,
  864, 864,  503, 534,  720, 751,  865, 896,  866, 897,  840, 871,  867, 898,
  781, 812,  811, 842,  628, 659,  868, 899,  751, 782,  597, 628,  659, 690,
  566, 597,  690, 721,  869, 900,  841, 872,  535, 566,  721, 752,  812, 843,
  870, 901,  782, 813,  842, 873,  504, 535,  752, 783,  871, 902,  629, 660,
  660, 691,  896, 896,  897, 928,  598, 629,  691, 722,  813, 844,  898, 929,
  872, 903,  783, 814,  843, 874,  899, 930,  567, 598,  722, 753,  900, 931,
  536, 567,  753, 784,  873, 904,  901, 932,  814, 845,  844, 875,  902, 933,
  505, 536,  784, 815,  661, 692,  630, 661,  692, 723,  874, 905,  599, 630,
  723, 754,  903, 934,  845, 876,  568, 599,  754, 785,  928, 928,  815, 846,
  929, 960,  930, 961,  875, 906,  904, 935,  931, 962,  537, 568,  785, 816,
  932, 963,  905, 936,  662, 693,  693, 724,  846, 877,  933, 964,  876, 907,
  631, 662,  724, 755,  506, 537,  816, 847,  934, 965,  600, 631,  755, 786,
  906, 937,  569, 600,  786, 817,  935, 966,  877, 908,  847, 878,  960, 960,
  907, 938,  961, 992,  936, 967,  538, 569,  817, 848,  962, 993,  694, 725,
  663, 694,  725, 756,  963, 994,  632, 663,  756, 787,  964, 995,  878, 909,
  937, 968,  507, 538,  848, 879,  908, 939,  601, 632,  787, 818,  965, 996,
  966, 997,  570, 601,  818, 849,  938, 969,  879, 910,  909, 940,  967, 998,
  695, 726,  726, 757,  664, 695,  757, 788,  539, 570,  849, 880,  939, 970,
  633, 664,  788, 819,  968, 999,  602, 633,  819, 850,  910, 941,  508, 539,
  880, 911,  969, 1000, 940, 971,  571, 602,  850, 881,  727, 758,  696, 727,
  758, 789,  970, 1001, 665, 696,  789, 820,  911, 942,  941, 972,  540, 571,
  881, 912,  634, 665,  820, 851,  971, 1002, 603, 634,  851, 882,  942, 973,
  509, 540,  912, 943,  728, 759,  759, 790,  972, 1003, 572, 603,  882, 913,
  697, 728,  790, 821,  666, 697,  821, 852,  943, 974,  635, 666,  852, 883,
  541, 572,  913, 944,  973, 1004, 604, 635,  883, 914,  760, 791,  729, 760,
  791, 822,  510, 541,  944, 975,  974, 1005, 698, 729,  822, 853,  573, 604,
  914, 945,  667, 698,  853, 884,  636, 667,  884, 915,  975, 1006, 542, 573,
  945, 976,  761, 792,  792, 823,  605, 636,  915, 946,  730, 761,  823, 854,
  699, 730,  854, 885,  511, 542,  976, 1007, 574, 605,  946, 977,  668, 699,
  885, 916,  637, 668,  916, 947,  543, 574,  793, 824,  977, 1008, 762, 793,
  824, 855,  731, 762,  855, 886,  606, 637,  947, 978,  700, 731,  886, 917,
  669, 700,  917, 948,  575, 606,  978, 1009, 638, 669,  948, 979,  794, 825,
  825, 856,  763, 794,  856, 887,  732, 763,  887, 918,  607, 638,  979, 1010,
  701, 732,  918, 949,  670, 701,  949, 980,  826, 857,  795, 826,  857, 888,
  764, 795,  888, 919,  639, 670,  980, 1011, 733, 764,  919, 950,  702, 733,
  950, 981,  671, 702,  981, 1012, 827, 858,  858, 889,  796, 827,  889, 920,
  765, 796,  920, 951,  734, 765,  951, 982,  703, 734,  982, 1013, 859, 890,
  828, 859,  890, 921,  797, 828,  921, 952,  766, 797,  952, 983,  735, 766,
  983, 1014, 860, 891,  891, 922,  829, 860,  922, 953,  798, 829,  953, 984,
  767, 798,  984, 1015, 892, 923,  861, 892,  923, 954,  830, 861,  954, 985,
  799, 830,  985, 1016, 893, 924,  924, 955,  862, 893,  955, 986,  831, 862,
  986, 1017, 925, 956,  894, 925,  956, 987,  863, 894,  987, 1018, 926, 957,
  957, 988,  895, 926,  988, 1019, 958, 989,  927, 958,  989, 1020, 959, 990,
  990, 1021, 991, 1022, 0,   0
};

DECLARE_ALIGNED(16, static const int16_t,
                qtr_scan_32x32_neighbors[1025 * MAX_NEIGHBORS]) = {
  0,   0,    0,   0,    0,   0,    1,   32,   1,   1,    32,  32,   2,   33,
  33,  64,   34,  65,   2,   2,    64,  64,   3,   34,   65,  96,   35,  66,
  66,  97,   3,   3,    96,  96,   4,   35,   97,  128,  67,  98,   36,  67,
  98,  129,  4,   4,    68,  99,   99,  130,  128, 128,  5,   36,   129, 160,
  37,  68,   130, 161,  100, 131,  69,  100,  131, 162,  5,   5,    160, 160,
  6,   37,   161, 192,  38,  69,   162, 193,  101, 132,  132, 163,  70,  101,
  163, 194,  6,   6,    192, 192,  7,   38,   133, 164,  193, 224,  102, 133,
  164, 195,  39,  70,   194, 225,  71,  102,  195, 226,  134, 165,  165, 196,
  7,   7,    224, 224,  8,   39,   103, 134,  196, 227,  225, 256,  40,  71,
  226, 257,  166, 197,  72,  103,  227, 258,  135, 166,  197, 228,  104, 135,
  228, 259,  8,   8,    256, 256,  9,   40,   257, 288,  41,  72,   167, 198,
  198, 229,  258, 289,  136, 167,  229, 260,  73,  104,  259, 290,  105, 136,
  260, 291,  199, 230,  9,   9,    168, 199,  230, 261,  288, 288,  10,  41,
  289, 320,  42,  73,   290, 321,  137, 168,  261, 292,  74,  105,  291, 322,
  200, 231,  231, 262,  106, 137,  292, 323,  169, 200,  262, 293,  10,  10,
  320, 320,  11,  42,   321, 352,  43,  74,   138, 169,  293, 324,  322, 353,
  232, 263,  75,  106,  201, 232,  263, 294,  323, 354,  170, 201,  294, 325,
  107, 138,  324, 355,  11,  11,   352, 352,  12,  43,   233, 264,  264, 295,
  353, 384,  139, 170,  325, 356,  44,  75,   354, 385,  202, 233,  295, 326,
  76,  107,  355, 386,  171, 202,  326, 357,  108, 139,  356, 387,  265, 296,
  234, 265,  296, 327,  12,  12,   140, 171,  357, 388,  384, 384,  13,  44,
  203, 234,  327, 358,  385, 416,  45,  76,   386, 417,  77,  108,  387, 418,
  172, 203,  358, 389,  266, 297,  297, 328,  109, 140,  235, 266,  328, 359,
  388, 419,  204, 235,  359, 390,  141, 172,  389, 420,  13,  13,   416, 416,
  14,  45,   417, 448,  46,  77,   298, 329,  418, 449,  267, 298,  329, 360,
  78,  109,  173, 204,  390, 421,  419, 450,  236, 267,  360, 391,  110, 141,
  420, 451,  205, 236,  391, 422,  142, 173,  299, 330,  330, 361,  421, 452,
  14,  14,   268, 299,  361, 392,  448, 448,  15,  46,   449, 480,  47,  78,
  450, 481,  174, 205,  422, 453,  237, 268,  392, 423,  79,  110,  451, 482,
  111, 142,  452, 483,  331, 362,  300, 331,  362, 393,  206, 237,  423, 454,
  143, 174,  269, 300,  393, 424,  453, 484,  238, 269,  424, 455,  175, 206,
  454, 485,  332, 363,  363, 394,  301, 332,  394, 425,  207, 238,  455, 486,
  270, 301,  425, 456,  364, 395,  239, 270,  456, 487,  333, 364,  395, 426,
  302, 333,  426, 457,  271, 302,  457, 488,  365, 396,  396, 427,  334, 365,
  427, 458,  303, 334,  458, 489,  397, 428,  366, 397,  428, 459,  335, 366,
  459, 490,  398, 429,  429, 460,  367, 398,  460, 491,  430, 461,  399, 430,
  461, 492,  431, 462,  462, 493,  463, 494,  15,  15,   480, 480,  16,  47,
  481, 512,  48,  79,   482, 513,  80,  111,  483, 514,  112, 143,  484, 515,
  144, 175,  485, 516,  16,  16,   512, 512,  17,  48,   513, 544,  176, 207,
  486, 517,  49,  80,   514, 545,  81,  112,  515, 546,  113, 144,  208, 239,
  487, 518,  516, 547,  145, 176,  517, 548,  240, 271,  488, 519,  17,  17,
  544, 544,  18,  49,   177, 208,  518, 549,  545, 576,  50,  81,   546, 577,
  82,  113,  547, 578,  272, 303,  489, 520,  209, 240,  519, 550,  114, 145,
  548, 579,  146, 177,  549, 580,  241, 272,  520, 551,  304, 335,  490, 521,
  178, 209,  550, 581,  18,  18,   576, 576,  19,  50,   577, 608,  51,  82,
  578, 609,  83,  114,  273, 304,  521, 552,  579, 610,  210, 241,  551, 582,
  115, 146,  336, 367,  491, 522,  580, 611,  147, 178,  581, 612,  242, 273,
  552, 583,  305, 336,  522, 553,  179, 210,  582, 613,  19,  19,   368, 399,
  492, 523,  608, 608,  20,  51,   609, 640,  52,  83,   610, 641,  274, 305,
  553, 584,  84,  115,  611, 642,  211, 242,  337, 368,  523, 554,  583, 614,
  116, 147,  612, 643,  306, 337,  554, 585,  148, 179,  243, 274,  400, 431,
  493, 524,  584, 615,  613, 644,  369, 400,  524, 555,  180, 211,  614, 645,
  20,  20,   640, 640,  21,  52,   275, 306,  585, 616,  641, 672,  53,  84,
  338, 369,  555, 586,  642, 673,  212, 243,  615, 646,  85,  116,  643, 674,
  432, 463,  494, 525,  117, 148,  644, 675,  401, 432,  525, 556,  307, 338,
  586, 617,  244, 275,  616, 647,  149, 180,  645, 676,  370, 401,  556, 587,
  181, 212,  646, 677,  276, 307,  464, 495,  495, 526,  617, 648,  339, 370,
  587, 618,  21,  21,   672, 672,  22,  53,   433, 464,  526, 557,  673, 704,
  54,  85,   674, 705,  213, 244,  647, 678,  86,  117,  402, 433,  557, 588,
  675, 706,  118, 149,  308, 339,  618, 649,  676, 707,  245, 276,  371, 402,
  588, 619,  648, 679,  150, 181,  677, 708,  496, 527,  465, 496,  527, 558,
  182, 213,  434, 465,  558, 589,  678, 709,  340, 371,  619, 650,  277, 308,
  649, 680,  22,  22,   704, 704,  23,  54,   403, 434,  589, 620,  705, 736,
  55,  86,   214, 245,  679, 710,  706, 737,  87,  118,  707, 738,  309, 340,
  650, 681,  372, 403,  620, 651,  119, 150,  497, 528,  528, 559,  708, 739,
  246, 277,  680, 711,  466, 497,  559, 590,  151, 182,  709, 740,  435, 466,
  590, 621,  341, 372,  651, 682,  183, 214,  278, 309,  681, 712,  710, 741,
  404, 435,  621, 652,  23,  23,   736, 736,  24,  55,   737, 768,  215, 246,
  529, 560,  711, 742,  56,  87,   498, 529,  560, 591,  738, 769,  310, 341,
  682, 713,  88,  119,  373, 404,  652, 683,  739, 770,  467, 498,  591, 622,
  120, 151,  740, 771,  247, 278,  712, 743,  436, 467,  622, 653,  152, 183,
  741, 772,  342, 373,  683, 714,  279, 310,  405, 436,  653, 684,  713, 744,
  184, 215,  742, 773,  530, 561,  561, 592,  499, 530,  592, 623,  24,  24,
  216, 247,  468, 499,  623, 654,  743, 774,  768, 768,  25,  56,   769, 800,
  374, 405,  684, 715,  57,  88,   311, 342,  714, 745,  770, 801,  89,  120,
  771, 802,  437, 468,  654, 685,  248, 279,  744, 775,  121, 152,  772, 803,
  562, 593,  153, 184,  343, 374,  531, 562,  593, 624,  715, 746,  773, 804,
  406, 437,  685, 716,  500, 531,  624, 655,  280, 311,  745, 776,  185, 216,
  774, 805,  469, 500,  655, 686,  375, 406,  716, 747,  217, 248,  775, 806,
  25,  25,   312, 343,  746, 777,  800, 800,  26,  57,   801, 832,  58,  89,
  438, 469,  686, 717,  802, 833,  90,  121,  563, 594,  594, 625,  803, 834,
  249, 280,  532, 563,  625, 656,  776, 807,  122, 153,  804, 835,  344, 375,
  501, 532,  656, 687,  747, 778,  407, 438,  717, 748,  154, 185,  805, 836,
  281, 312,  777, 808,  470, 501,  687, 718,  186, 217,  806, 837,  376, 407,
  748, 779,  595, 626,  564, 595,  626, 657,  218, 249,  313, 344,  439, 470,
  718, 749,  778, 809,  807, 838,  26,  26,   832, 832,  27,  58,   533, 564,
  657, 688,  833, 864,  59,  90,   834, 865,  91,  122,  835, 866,  250, 281,
  502, 533,  688, 719,  808, 839,  123, 154,  408, 439,  749, 780,  836, 867,
  345, 376,  779, 810,  155, 186,  471, 502,  719, 750,  837, 868,  282, 313,
  809, 840,  596, 627,  627, 658,  187, 218,  565, 596,  658, 689,  838, 869,
  377, 408,  780, 811,  440, 471,  750, 781,  534, 565,  689, 720,  314, 345,
  810, 841,  219, 250,  839, 870,  27,  27,   864, 864,  28,  59,   503, 534,
  720, 751,  865, 896,  60,  91,   866, 897,  92,  123,  251, 282,  840, 871,
  867, 898,  409, 440,  781, 812,  346, 377,  811, 842,  124, 155,  628, 659,
  868, 899,  472, 503,  751, 782,  597, 628,  659, 690,  566, 597,  690, 721,
  156, 187,  869, 900,  283, 314,  841, 872,  535, 566,  721, 752,  188, 219,
  378, 409,  812, 843,  870, 901,  441, 472,  782, 813,  315, 346,  842, 873,
  504, 535,  752, 783,  220, 251,  871, 902,  28,  28,   629, 660,  660, 691,
  896, 896,  29,  60,   897, 928,  61,  92,   410, 441,  598, 629,  691, 722,
  813, 844,  898, 929,  252, 283,  872, 903,  93,  124,  347, 378,  473, 504,
  783, 814,  843, 874,  899, 930,  567, 598,  722, 753,  125, 156,  900, 931,
  284, 315,  536, 567,  753, 784,  873, 904,  157, 188,  901, 932,  442, 473,
  814, 845,  379, 410,  844, 875,  189, 220,  902, 933,  505, 536,  784, 815,
  661, 692,  316, 347,  630, 661,  692, 723,  874, 905,  221, 252,  599, 630,
  723, 754,  903, 934,  411, 442,  845, 876,  29,  29,   568, 599,  754, 785,
  928, 928,  30,  61,   474, 505,  815, 846,  929, 960,  62,  93,   930, 961,
  253, 284,  348, 379,  875, 906,  904, 935,  94,  125,  931, 962,  537, 568,
  785, 816,  126, 157,  932, 963,  285, 316,  905, 936,  158, 189,  443, 474,
  662, 693,  693, 724,  846, 877,  933, 964,  380, 411,  876, 907,  631, 662,
  724, 755,  506, 537,  816, 847,  190, 221,  934, 965,  600, 631,  755, 786,
  317, 348,  906, 937,  222, 253,  569, 600,  786, 817,  935, 966,  412, 443,
  877, 908,  475, 506,  847, 878,  30,  30,   960, 960,  31,  62,   349, 380,
  907, 938,  961, 992,  254, 285,  936, 967,  63,  94,   538, 569,  817, 848,
  962, 993,  694, 725,  95,  126,  663, 694,  725, 756,  963, 994,  632, 663,
  756, 787,  127, 158,  964, 995,  444, 475,  878, 909,  286, 317,  937, 968,
  381, 412,  507, 538,  848, 879,  908, 939,  159, 190,  601, 632,  787, 818,
  965, 996,  191, 222,  966, 997,  318, 349,  570, 601,  818, 849,  938, 969,
  476, 507,  879, 910,  223, 254,  413, 444,  909, 940,  967, 998,  695, 726,
  726, 757,  664, 695,  757, 788,  539, 570,  849, 880,  350, 381,  939, 970,
  255, 286,  633, 664,  788, 819,  968, 999,  445, 476,  602, 633,  819, 850,
  910, 941,  508, 539,  880, 911,  287, 318,  969, 1000, 382, 413,  940, 971,
  571, 602,  850, 881,  727, 758,  696, 727,  758, 789,  319, 350,  970, 1001,
  477, 508,  665, 696,  789, 820,  911, 942,  414, 445,  941, 972,  540, 571,
  881, 912,  634, 665,  820, 851,  351, 382,  971, 1002, 603, 634,  851, 882,
  446, 477,  942, 973,  509, 540,  912, 943,  383, 414,  728, 759,  759, 790,
  972, 1003, 572, 603,  882, 913,  697, 728,  790, 821,  666, 697,  821, 852,
  478, 509,  943, 974,  635, 666,  852, 883,  415, 446,  541, 572,  913, 944,
  973, 1004, 604, 635,  883, 914,  760, 791,  729, 760,  791, 822,  510, 541,
  944, 975,  447, 478,  974, 1005, 698, 729,  822, 853,  573, 604,  914, 945,
  667, 698,  853, 884,  636, 667,  884, 915,  479, 510,  975, 1006, 542, 573,
  945, 976,  761, 792,  792, 823,  605, 636,  915, 946,  730, 761,  823, 854,
  699, 730,  854, 885,  511, 542,  976, 1007, 574, 605,  946, 977,  668, 699,
  885, 916,  637, 668,  916, 947,  543, 574,  793, 824,  977, 1008, 762, 793,
  824, 855,  731, 762,  855, 886,  606, 637,  947, 978,  700, 731,  886, 917,
  669, 700,  917, 948,  575, 606,  978, 1009, 638, 669,  948, 979,  794, 825,
  825, 856,  763, 794,  856, 887,  732, 763,  887, 918,  607, 638,  979, 1010,
  701, 732,  918, 949,  670, 701,  949, 980,  826, 857,  795, 826,  857, 888,
  764, 795,  888, 919,  639, 670,  980, 1011, 733, 764,  919, 950,  702, 733,
  950, 981,  671, 702,  981, 1012, 827, 858,  858, 889,  796, 827,  889, 920,
  765, 796,  920, 951,  734, 765,  951, 982,  703, 734,  982, 1013, 859, 890,
  828, 859,  890, 921,  797, 828,  921, 952,  766, 797,  952, 983,  735, 766,
  983, 1014, 860, 891,  891, 922,  829, 860,  922, 953,  798, 829,  953, 984,
  767, 798,  984, 1015, 892, 923,  861, 892,  923, 954,  830, 861,  954, 985,
  799, 830,  985, 1016, 893, 924,  924, 955,  862, 893,  955, 986,  831, 862,
  986, 1017, 925, 956,  894, 925,  956, 987,  863, 894,  987, 1018, 926, 957,
  957, 988,  895, 926,  988, 1019, 958, 989,  927, 958,  989, 1020, 959, 990,
  990, 1021, 991, 1022, 0,   0
};
#endif  // CONFIG_EXT_TX

DECLARE_ALIGNED(16, static const int16_t, av1_default_iscan_4x4[16]) = {
  0, 2, 5, 8, 1, 3, 9, 12, 4, 7, 11, 14, 6, 10, 13, 15,
};

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t, av1_mcol_iscan_4x4[16]) = {
  0, 4, 8, 12, 1, 5, 9, 13, 2, 6, 10, 14, 3, 7, 11, 15,
};

DECLARE_ALIGNED(16, static const int16_t, av1_mrow_iscan_4x4[16]) = {
  0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
};
#endif  // CONFIG_EXT_TX

DECLARE_ALIGNED(16, static const int16_t, av1_col_iscan_4x4[16]) = {
  0, 3, 7, 11, 1, 5, 9, 12, 2, 6, 10, 14, 4, 8, 13, 15,
};

DECLARE_ALIGNED(16, static const int16_t, av1_row_iscan_4x4[16]) = {
  0, 1, 3, 5, 2, 4, 6, 9, 7, 8, 11, 13, 10, 12, 14, 15,
};

DECLARE_ALIGNED(16, static const int16_t, av1_default_iscan_4x8[32]) = {
  0,  1,  4,  9,  2,  3,  6,  11, 5,  7,  8,  13, 10, 12, 14, 17,
  15, 16, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
};

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t, av1_mcol_iscan_4x8[32]) = {
  0, 8,  16, 24, 1, 9,  17, 25, 2, 10, 18, 26, 3, 11, 19, 27,
  4, 12, 20, 28, 5, 13, 21, 29, 6, 14, 22, 30, 7, 15, 23, 31,
};

DECLARE_ALIGNED(16, static const int16_t, av1_mrow_iscan_4x8[32]) = {
  0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15,
  16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
};
#endif

DECLARE_ALIGNED(16, static const int16_t, av1_default_iscan_8x4[32]) = {
  0, 1, 4, 9,  15, 19, 24, 28, 2,  3,  6,  11, 16, 21, 25, 29,
  5, 7, 8, 13, 18, 22, 26, 30, 10, 12, 14, 17, 20, 23, 27, 31,
};

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t, av1_mcol_iscan_8x4[32]) = {
  0, 4, 8,  12, 16, 20, 24, 28, 1, 5, 9,  13, 17, 21, 25, 29,
  2, 6, 10, 14, 18, 22, 26, 30, 3, 7, 11, 15, 19, 23, 27, 31,
};

DECLARE_ALIGNED(16, static const int16_t, av1_mrow_iscan_8x4[32]) = {
  0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15,
  16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
};
#endif  // CONFIG_EXT_TX

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t, av1_mcol_iscan_8x8[64]) = {
  0, 8,  16, 24, 32, 40, 48, 56, 1, 9,  17, 25, 33, 41, 49, 57,
  2, 10, 18, 26, 34, 42, 50, 58, 3, 11, 19, 27, 35, 43, 51, 59,
  4, 12, 20, 28, 36, 44, 52, 60, 5, 13, 21, 29, 37, 45, 53, 61,
  6, 14, 22, 30, 38, 46, 54, 62, 7, 15, 23, 31, 39, 47, 55, 63,
};

DECLARE_ALIGNED(16, static const int16_t, av1_mrow_iscan_8x8[64]) = {
  0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15,
  16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
  32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
  48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
};
#endif  // CONFIG_EXT_TX

DECLARE_ALIGNED(16, static const int16_t, av1_col_iscan_8x8[64]) = {
  0,  3,  8,  15, 22, 32, 40, 47, 1,  5,  11, 18, 26, 34, 44, 51,
  2,  7,  13, 20, 28, 38, 46, 54, 4,  10, 16, 24, 31, 41, 50, 56,
  6,  12, 21, 27, 35, 43, 52, 58, 9,  17, 25, 33, 39, 48, 55, 60,
  14, 23, 30, 37, 45, 53, 59, 62, 19, 29, 36, 42, 49, 57, 61, 63,
};

DECLARE_ALIGNED(16, static const int16_t, av1_row_iscan_8x8[64]) = {
  0,  1,  2,  5,  8,  12, 19, 24, 3,  4,  7,  10, 15, 20, 30, 39,
  6,  9,  13, 16, 21, 27, 37, 46, 11, 14, 17, 23, 28, 34, 44, 52,
  18, 22, 25, 31, 35, 41, 50, 57, 26, 29, 33, 38, 43, 49, 55, 59,
  32, 36, 42, 47, 51, 54, 60, 61, 40, 45, 48, 53, 56, 58, 62, 63,
};

DECLARE_ALIGNED(16, static const int16_t, av1_default_iscan_8x8[64]) = {
  0,  2,  5,  9,  14, 22, 31, 37, 1,  4,  8,  13, 19, 26, 38, 44,
  3,  6,  10, 17, 24, 30, 42, 49, 7,  11, 15, 21, 29, 36, 47, 53,
  12, 16, 20, 27, 34, 43, 52, 57, 18, 23, 28, 35, 41, 48, 56, 60,
  25, 32, 39, 45, 50, 55, 59, 62, 33, 40, 46, 51, 54, 58, 61, 63,
};

DECLARE_ALIGNED(16, static const int16_t, av1_default_iscan_8x16[128]) = {
  0,  1,  3,   6,   10,  15,  21,  28,  2,  4,   7,   11,  16,  22,  29,  36,
  5,  8,  12,  17,  23,  30,  37,  44,  9,  13,  18,  24,  31,  38,  45,  52,
  14, 19, 25,  32,  39,  46,  53,  60,  20, 26,  33,  40,  47,  54,  61,  68,
  27, 34, 41,  48,  55,  62,  69,  76,  35, 42,  49,  56,  63,  70,  77,  84,
  43, 50, 57,  64,  71,  78,  85,  92,  51, 58,  65,  72,  79,  86,  93,  100,
  59, 66, 73,  80,  87,  94,  101, 107, 67, 74,  81,  88,  95,  102, 108, 113,
  75, 82, 89,  96,  103, 109, 114, 118, 83, 90,  97,  104, 110, 115, 119, 122,
  91, 98, 105, 111, 116, 120, 123, 125, 99, 106, 112, 117, 121, 124, 126, 127,
};

DECLARE_ALIGNED(16, static const int16_t, av1_default_iscan_16x8[128]) = {
  0,  1,  3,  6,  10, 15, 21, 28, 36, 44,  52,  60,  68,  76,  84,  92,
  2,  4,  7,  11, 16, 22, 29, 37, 45, 53,  61,  69,  77,  85,  93,  100,
  5,  8,  12, 17, 23, 30, 38, 46, 54, 62,  70,  78,  86,  94,  101, 107,
  9,  13, 18, 24, 31, 39, 47, 55, 63, 71,  79,  87,  95,  102, 108, 113,
  14, 19, 25, 32, 40, 48, 56, 64, 72, 80,  88,  96,  103, 109, 114, 118,
  20, 26, 33, 41, 49, 57, 65, 73, 81, 89,  97,  104, 110, 115, 119, 122,
  27, 34, 42, 50, 58, 66, 74, 82, 90, 98,  105, 111, 116, 120, 123, 125,
  35, 43, 51, 59, 67, 75, 83, 91, 99, 106, 112, 117, 121, 124, 126, 127,
};

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t, av1_mcol_iscan_8x16[128]) = {
  0,  16, 32, 48, 64, 80, 96,  112, 1,  17, 33, 49, 65, 81, 97,  113,
  2,  18, 34, 50, 66, 82, 98,  114, 3,  19, 35, 51, 67, 83, 99,  115,
  4,  20, 36, 52, 68, 84, 100, 116, 5,  21, 37, 53, 69, 85, 101, 117,
  6,  22, 38, 54, 70, 86, 102, 118, 7,  23, 39, 55, 71, 87, 103, 119,
  8,  24, 40, 56, 72, 88, 104, 120, 9,  25, 41, 57, 73, 89, 105, 121,
  10, 26, 42, 58, 74, 90, 106, 122, 11, 27, 43, 59, 75, 91, 107, 123,
  12, 28, 44, 60, 76, 92, 108, 124, 13, 29, 45, 61, 77, 93, 109, 125,
  14, 30, 46, 62, 78, 94, 110, 126, 15, 31, 47, 63, 79, 95, 111, 127,
};

DECLARE_ALIGNED(16, static const int16_t, av1_mcol_iscan_16x8[128]) = {
  0, 8,  16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 96,  104, 112, 120,
  1, 9,  17, 25, 33, 41, 49, 57, 65, 73, 81, 89, 97,  105, 113, 121,
  2, 10, 18, 26, 34, 42, 50, 58, 66, 74, 82, 90, 98,  106, 114, 122,
  3, 11, 19, 27, 35, 43, 51, 59, 67, 75, 83, 91, 99,  107, 115, 123,
  4, 12, 20, 28, 36, 44, 52, 60, 68, 76, 84, 92, 100, 108, 116, 124,
  5, 13, 21, 29, 37, 45, 53, 61, 69, 77, 85, 93, 101, 109, 117, 125,
  6, 14, 22, 30, 38, 46, 54, 62, 70, 78, 86, 94, 102, 110, 118, 126,
  7, 15, 23, 31, 39, 47, 55, 63, 71, 79, 87, 95, 103, 111, 119, 127,
};

DECLARE_ALIGNED(16, static const int16_t, av1_mrow_iscan_8x16[128]) = {
  0,   1,   2,   3,   4,   5,   6,   7,   8,   9,   10,  11,  12,  13,  14,
  15,  16,  17,  18,  19,  20,  21,  22,  23,  24,  25,  26,  27,  28,  29,
  30,  31,  32,  33,  34,  35,  36,  37,  38,  39,  40,  41,  42,  43,  44,
  45,  46,  47,  48,  49,  50,  51,  52,  53,  54,  55,  56,  57,  58,  59,
  60,  61,  62,  63,  64,  65,  66,  67,  68,  69,  70,  71,  72,  73,  74,
  75,  76,  77,  78,  79,  80,  81,  82,  83,  84,  85,  86,  87,  88,  89,
  90,  91,  92,  93,  94,  95,  96,  97,  98,  99,  100, 101, 102, 103, 104,
  105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119,
  120, 121, 122, 123, 124, 125, 126, 127,
};

DECLARE_ALIGNED(16, static const int16_t, av1_mrow_iscan_16x8[128]) = {
  0,   1,   2,   3,   4,   5,   6,   7,   8,   9,   10,  11,  12,  13,  14,
  15,  16,  17,  18,  19,  20,  21,  22,  23,  24,  25,  26,  27,  28,  29,
  30,  31,  32,  33,  34,  35,  36,  37,  38,  39,  40,  41,  42,  43,  44,
  45,  46,  47,  48,  49,  50,  51,  52,  53,  54,  55,  56,  57,  58,  59,
  60,  61,  62,  63,  64,  65,  66,  67,  68,  69,  70,  71,  72,  73,  74,
  75,  76,  77,  78,  79,  80,  81,  82,  83,  84,  85,  86,  87,  88,  89,
  90,  91,  92,  93,  94,  95,  96,  97,  98,  99,  100, 101, 102, 103, 104,
  105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119,
  120, 121, 122, 123, 124, 125, 126, 127,
};
#endif

DECLARE_ALIGNED(16, static const int16_t, av1_default_iscan_16x32[512]) = {
  0,   1,   3,   6,   10,  15,  21,  28,  36,  45,  55,  66,  78,  91,  105,
  120, 2,   4,   7,   11,  16,  22,  29,  37,  46,  56,  67,  79,  92,  106,
  121, 136, 5,   8,   12,  17,  23,  30,  38,  47,  57,  68,  80,  93,  107,
  122, 137, 152, 9,   13,  18,  24,  31,  39,  48,  58,  69,  81,  94,  108,
  123, 138, 153, 168, 14,  19,  25,  32,  40,  49,  59,  70,  82,  95,  109,
  124, 139, 154, 169, 184, 20,  26,  33,  41,  50,  60,  71,  83,  96,  110,
  125, 140, 155, 170, 185, 200, 27,  34,  42,  51,  61,  72,  84,  97,  111,
  126, 141, 156, 171, 186, 201, 216, 35,  43,  52,  62,  73,  85,  98,  112,
  127, 142, 157, 172, 187, 202, 217, 232, 44,  53,  63,  74,  86,  99,  113,
  128, 143, 158, 173, 188, 203, 218, 233, 248, 54,  64,  75,  87,  100, 114,
  129, 144, 159, 174, 189, 204, 219, 234, 249, 264, 65,  76,  88,  101, 115,
  130, 145, 160, 175, 190, 205, 220, 235, 250, 265, 280, 77,  89,  102, 116,
  131, 146, 161, 176, 191, 206, 221, 236, 251, 266, 281, 296, 90,  103, 117,
  132, 147, 162, 177, 192, 207, 222, 237, 252, 267, 282, 297, 312, 104, 118,
  133, 148, 163, 178, 193, 208, 223, 238, 253, 268, 283, 298, 313, 328, 119,
  134, 149, 164, 179, 194, 209, 224, 239, 254, 269, 284, 299, 314, 329, 344,
  135, 150, 165, 180, 195, 210, 225, 240, 255, 270, 285, 300, 315, 330, 345,
  360, 151, 166, 181, 196, 211, 226, 241, 256, 271, 286, 301, 316, 331, 346,
  361, 376, 167, 182, 197, 212, 227, 242, 257, 272, 287, 302, 317, 332, 347,
  362, 377, 392, 183, 198, 213, 228, 243, 258, 273, 288, 303, 318, 333, 348,
  363, 378, 393, 407, 199, 214, 229, 244, 259, 274, 289, 304, 319, 334, 349,
  364, 379, 394, 408, 421, 215, 230, 245, 260, 275, 290, 305, 320, 335, 350,
  365, 380, 395, 409, 422, 434, 231, 246, 261, 276, 291, 306, 321, 336, 351,
  366, 381, 396, 410, 423, 435, 446, 247, 262, 277, 292, 307, 322, 337, 352,
  367, 382, 397, 411, 424, 436, 447, 457, 263, 278, 293, 308, 323, 338, 353,
  368, 383, 398, 412, 425, 437, 448, 458, 467, 279, 294, 309, 324, 339, 354,
  369, 384, 399, 413, 426, 438, 449, 459, 468, 476, 295, 310, 325, 340, 355,
  370, 385, 400, 414, 427, 439, 450, 460, 469, 477, 484, 311, 326, 341, 356,
  371, 386, 401, 415, 428, 440, 451, 461, 470, 478, 485, 491, 327, 342, 357,
  372, 387, 402, 416, 429, 441, 452, 462, 471, 479, 486, 492, 497, 343, 358,
  373, 388, 403, 417, 430, 442, 453, 463, 472, 480, 487, 493, 498, 502, 359,
  374, 389, 404, 418, 431, 443, 454, 464, 473, 481, 488, 494, 499, 503, 506,
  375, 390, 405, 419, 432, 444, 455, 465, 474, 482, 489, 495, 500, 504, 507,
  509, 391, 406, 420, 433, 445, 456, 466, 475, 483, 490, 496, 501, 505, 508,
  510, 511,
};

DECLARE_ALIGNED(16, static const int16_t, av1_default_iscan_32x16[512]) = {
  0,   1,   3,   6,   10,  15,  21,  28,  36,  45,  55,  66,  78,  91,  105,
  120, 136, 152, 168, 184, 200, 216, 232, 248, 264, 280, 296, 312, 328, 344,
  360, 376, 2,   4,   7,   11,  16,  22,  29,  37,  46,  56,  67,  79,  92,
  106, 121, 137, 153, 169, 185, 201, 217, 233, 249, 265, 281, 297, 313, 329,
  345, 361, 377, 392, 5,   8,   12,  17,  23,  30,  38,  47,  57,  68,  80,
  93,  107, 122, 138, 154, 170, 186, 202, 218, 234, 250, 266, 282, 298, 314,
  330, 346, 362, 378, 393, 407, 9,   13,  18,  24,  31,  39,  48,  58,  69,
  81,  94,  108, 123, 139, 155, 171, 187, 203, 219, 235, 251, 267, 283, 299,
  315, 331, 347, 363, 379, 394, 408, 421, 14,  19,  25,  32,  40,  49,  59,
  70,  82,  95,  109, 124, 140, 156, 172, 188, 204, 220, 236, 252, 268, 284,
  300, 316, 332, 348, 364, 380, 395, 409, 422, 434, 20,  26,  33,  41,  50,
  60,  71,  83,  96,  110, 125, 141, 157, 173, 189, 205, 221, 237, 253, 269,
  285, 301, 317, 333, 349, 365, 381, 396, 410, 423, 435, 446, 27,  34,  42,
  51,  61,  72,  84,  97,  111, 126, 142, 158, 174, 190, 206, 222, 238, 254,
  270, 286, 302, 318, 334, 350, 366, 382, 397, 411, 424, 436, 447, 457, 35,
  43,  52,  62,  73,  85,  98,  112, 127, 143, 159, 175, 191, 207, 223, 239,
  255, 271, 287, 303, 319, 335, 351, 367, 383, 398, 412, 425, 437, 448, 458,
  467, 44,  53,  63,  74,  86,  99,  113, 128, 144, 160, 176, 192, 208, 224,
  240, 256, 272, 288, 304, 320, 336, 352, 368, 384, 399, 413, 426, 438, 449,
  459, 468, 476, 54,  64,  75,  87,  100, 114, 129, 145, 161, 177, 193, 209,
  225, 241, 257, 273, 289, 305, 321, 337, 353, 369, 385, 400, 414, 427, 439,
  450, 460, 469, 477, 484, 65,  76,  88,  101, 115, 130, 146, 162, 178, 194,
  210, 226, 242, 258, 274, 290, 306, 322, 338, 354, 370, 386, 401, 415, 428,
  440, 451, 461, 470, 478, 485, 491, 77,  89,  102, 116, 131, 147, 163, 179,
  195, 211, 227, 243, 259, 275, 291, 307, 323, 339, 355, 371, 387, 402, 416,
  429, 441, 452, 462, 471, 479, 486, 492, 497, 90,  103, 117, 132, 148, 164,
  180, 196, 212, 228, 244, 260, 276, 292, 308, 324, 340, 356, 372, 388, 403,
  417, 430, 442, 453, 463, 472, 480, 487, 493, 498, 502, 104, 118, 133, 149,
  165, 181, 197, 213, 229, 245, 261, 277, 293, 309, 325, 341, 357, 373, 389,
  404, 418, 431, 443, 454, 464, 473, 481, 488, 494, 499, 503, 506, 119, 134,
  150, 166, 182, 198, 214, 230, 246, 262, 278, 294, 310, 326, 342, 358, 374,
  390, 405, 419, 432, 444, 455, 465, 474, 482, 489, 495, 500, 504, 507, 509,
  135, 151, 167, 183, 199, 215, 231, 247, 263, 279, 295, 311, 327, 343, 359,
  375, 391, 406, 420, 433, 445, 456, 466, 475, 483, 490, 496, 501, 505, 508,
  510, 511,
};

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t, av1_mcol_iscan_16x32[512]) = {
  0,  32, 64, 96,  128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448, 480,
  1,  33, 65, 97,  129, 161, 193, 225, 257, 289, 321, 353, 385, 417, 449, 481,
  2,  34, 66, 98,  130, 162, 194, 226, 258, 290, 322, 354, 386, 418, 450, 482,
  3,  35, 67, 99,  131, 163, 195, 227, 259, 291, 323, 355, 387, 419, 451, 483,
  4,  36, 68, 100, 132, 164, 196, 228, 260, 292, 324, 356, 388, 420, 452, 484,
  5,  37, 69, 101, 133, 165, 197, 229, 261, 293, 325, 357, 389, 421, 453, 485,
  6,  38, 70, 102, 134, 166, 198, 230, 262, 294, 326, 358, 390, 422, 454, 486,
  7,  39, 71, 103, 135, 167, 199, 231, 263, 295, 327, 359, 391, 423, 455, 487,
  8,  40, 72, 104, 136, 168, 200, 232, 264, 296, 328, 360, 392, 424, 456, 488,
  9,  41, 73, 105, 137, 169, 201, 233, 265, 297, 329, 361, 393, 425, 457, 489,
  10, 42, 74, 106, 138, 170, 202, 234, 266, 298, 330, 362, 394, 426, 458, 490,
  11, 43, 75, 107, 139, 171, 203, 235, 267, 299, 331, 363, 395, 427, 459, 491,
  12, 44, 76, 108, 140, 172, 204, 236, 268, 300, 332, 364, 396, 428, 460, 492,
  13, 45, 77, 109, 141, 173, 205, 237, 269, 301, 333, 365, 397, 429, 461, 493,
  14, 46, 78, 110, 142, 174, 206, 238, 270, 302, 334, 366, 398, 430, 462, 494,
  15, 47, 79, 111, 143, 175, 207, 239, 271, 303, 335, 367, 399, 431, 463, 495,
  16, 48, 80, 112, 144, 176, 208, 240, 272, 304, 336, 368, 400, 432, 464, 496,
  17, 49, 81, 113, 145, 177, 209, 241, 273, 305, 337, 369, 401, 433, 465, 497,
  18, 50, 82, 114, 146, 178, 210, 242, 274, 306, 338, 370, 402, 434, 466, 498,
  19, 51, 83, 115, 147, 179, 211, 243, 275, 307, 339, 371, 403, 435, 467, 499,
  20, 52, 84, 116, 148, 180, 212, 244, 276, 308, 340, 372, 404, 436, 468, 500,
  21, 53, 85, 117, 149, 181, 213, 245, 277, 309, 341, 373, 405, 437, 469, 501,
  22, 54, 86, 118, 150, 182, 214, 246, 278, 310, 342, 374, 406, 438, 470, 502,
  23, 55, 87, 119, 151, 183, 215, 247, 279, 311, 343, 375, 407, 439, 471, 503,
  24, 56, 88, 120, 152, 184, 216, 248, 280, 312, 344, 376, 408, 440, 472, 504,
  25, 57, 89, 121, 153, 185, 217, 249, 281, 313, 345, 377, 409, 441, 473, 505,
  26, 58, 90, 122, 154, 186, 218, 250, 282, 314, 346, 378, 410, 442, 474, 506,
  27, 59, 91, 123, 155, 187, 219, 251, 283, 315, 347, 379, 411, 443, 475, 507,
  28, 60, 92, 124, 156, 188, 220, 252, 284, 316, 348, 380, 412, 444, 476, 508,
  29, 61, 93, 125, 157, 189, 221, 253, 285, 317, 349, 381, 413, 445, 477, 509,
  30, 62, 94, 126, 158, 190, 222, 254, 286, 318, 350, 382, 414, 446, 478, 510,
  31, 63, 95, 127, 159, 191, 223, 255, 287, 319, 351, 383, 415, 447, 479, 511,
};

DECLARE_ALIGNED(16, static const int16_t, av1_mcol_iscan_32x16[512]) = {
  0,   16,  32,  48,  64,  80,  96,  112, 128, 144, 160, 176, 192, 208, 224,
  240, 256, 272, 288, 304, 320, 336, 352, 368, 384, 400, 416, 432, 448, 464,
  480, 496, 1,   17,  33,  49,  65,  81,  97,  113, 129, 145, 161, 177, 193,
  209, 225, 241, 257, 273, 289, 305, 321, 337, 353, 369, 385, 401, 417, 433,
  449, 465, 481, 497, 2,   18,  34,  50,  66,  82,  98,  114, 130, 146, 162,
  178, 194, 210, 226, 242, 258, 274, 290, 306, 322, 338, 354, 370, 386, 402,
  418, 434, 450, 466, 482, 498, 3,   19,  35,  51,  67,  83,  99,  115, 131,
  147, 163, 179, 195, 211, 227, 243, 259, 275, 291, 307, 323, 339, 355, 371,
  387, 403, 419, 435, 451, 467, 483, 499, 4,   20,  36,  52,  68,  84,  100,
  116, 132, 148, 164, 180, 196, 212, 228, 244, 260, 276, 292, 308, 324, 340,
  356, 372, 388, 404, 420, 436, 452, 468, 484, 500, 5,   21,  37,  53,  69,
  85,  101, 117, 133, 149, 165, 181, 197, 213, 229, 245, 261, 277, 293, 309,
  325, 341, 357, 373, 389, 405, 421, 437, 453, 469, 485, 501, 6,   22,  38,
  54,  70,  86,  102, 118, 134, 150, 166, 182, 198, 214, 230, 246, 262, 278,
  294, 310, 326, 342, 358, 374, 390, 406, 422, 438, 454, 470, 486, 502, 7,
  23,  39,  55,  71,  87,  103, 119, 135, 151, 167, 183, 199, 215, 231, 247,
  263, 279, 295, 311, 327, 343, 359, 375, 391, 407, 423, 439, 455, 471, 487,
  503, 8,   24,  40,  56,  72,  88,  104, 120, 136, 152, 168, 184, 200, 216,
  232, 248, 264, 280, 296, 312, 328, 344, 360, 376, 392, 408, 424, 440, 456,
  472, 488, 504, 9,   25,  41,  57,  73,  89,  105, 121, 137, 153, 169, 185,
  201, 217, 233, 249, 265, 281, 297, 313, 329, 345, 361, 377, 393, 409, 425,
  441, 457, 473, 489, 505, 10,  26,  42,  58,  74,  90,  106, 122, 138, 154,
  170, 186, 202, 218, 234, 250, 266, 282, 298, 314, 330, 346, 362, 378, 394,
  410, 426, 442, 458, 474, 490, 506, 11,  27,  43,  59,  75,  91,  107, 123,
  139, 155, 171, 187, 203, 219, 235, 251, 267, 283, 299, 315, 331, 347, 363,
  379, 395, 411, 427, 443, 459, 475, 491, 507, 12,  28,  44,  60,  76,  92,
  108, 124, 140, 156, 172, 188, 204, 220, 236, 252, 268, 284, 300, 316, 332,
  348, 364, 380, 396, 412, 428, 444, 460, 476, 492, 508, 13,  29,  45,  61,
  77,  93,  109, 125, 141, 157, 173, 189, 205, 221, 237, 253, 269, 285, 301,
  317, 333, 349, 365, 381, 397, 413, 429, 445, 461, 477, 493, 509, 14,  30,
  46,  62,  78,  94,  110, 126, 142, 158, 174, 190, 206, 222, 238, 254, 270,
  286, 302, 318, 334, 350, 366, 382, 398, 414, 430, 446, 462, 478, 494, 510,
  15,  31,  47,  63,  79,  95,  111, 127, 143, 159, 175, 191, 207, 223, 239,
  255, 271, 287, 303, 319, 335, 351, 367, 383, 399, 415, 431, 447, 463, 479,
  495, 511,
};

DECLARE_ALIGNED(16, static const int16_t, av1_mrow_iscan_16x32[512]) = {
  0,   1,   2,   3,   4,   5,   6,   7,   8,   9,   10,  11,  12,  13,  14,
  15,  16,  17,  18,  19,  20,  21,  22,  23,  24,  25,  26,  27,  28,  29,
  30,  31,  32,  33,  34,  35,  36,  37,  38,  39,  40,  41,  42,  43,  44,
  45,  46,  47,  48,  49,  50,  51,  52,  53,  54,  55,  56,  57,  58,  59,
  60,  61,  62,  63,  64,  65,  66,  67,  68,  69,  70,  71,  72,  73,  74,
  75,  76,  77,  78,  79,  80,  81,  82,  83,  84,  85,  86,  87,  88,  89,
  90,  91,  92,  93,  94,  95,  96,  97,  98,  99,  100, 101, 102, 103, 104,
  105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119,
  120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134,
  135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149,
  150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164,
  165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179,
  180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194,
  195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209,
  210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224,
  225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239,
  240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254,
  255, 256, 257, 258, 259, 260, 261, 262, 263, 264, 265, 266, 267, 268, 269,
  270, 271, 272, 273, 274, 275, 276, 277, 278, 279, 280, 281, 282, 283, 284,
  285, 286, 287, 288, 289, 290, 291, 292, 293, 294, 295, 296, 297, 298, 299,
  300, 301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312, 313, 314,
  315, 316, 317, 318, 319, 320, 321, 322, 323, 324, 325, 326, 327, 328, 329,
  330, 331, 332, 333, 334, 335, 336, 337, 338, 339, 340, 341, 342, 343, 344,
  345, 346, 347, 348, 349, 350, 351, 352, 353, 354, 355, 356, 357, 358, 359,
  360, 361, 362, 363, 364, 365, 366, 367, 368, 369, 370, 371, 372, 373, 374,
  375, 376, 377, 378, 379, 380, 381, 382, 383, 384, 385, 386, 387, 388, 389,
  390, 391, 392, 393, 394, 395, 396, 397, 398, 399, 400, 401, 402, 403, 404,
  405, 406, 407, 408, 409, 410, 411, 412, 413, 414, 415, 416, 417, 418, 419,
  420, 421, 422, 423, 424, 425, 426, 427, 428, 429, 430, 431, 432, 433, 434,
  435, 436, 437, 438, 439, 440, 441, 442, 443, 444, 445, 446, 447, 448, 449,
  450, 451, 452, 453, 454, 455, 456, 457, 458, 459, 460, 461, 462, 463, 464,
  465, 466, 467, 468, 469, 470, 471, 472, 473, 474, 475, 476, 477, 478, 479,
  480, 481, 482, 483, 484, 485, 486, 487, 488, 489, 490, 491, 492, 493, 494,
  495, 496, 497, 498, 499, 500, 501, 502, 503, 504, 505, 506, 507, 508, 509,
  510, 511,
};

DECLARE_ALIGNED(16, static const int16_t, av1_mrow_iscan_32x16[512]) = {
  0,   1,   2,   3,   4,   5,   6,   7,   8,   9,   10,  11,  12,  13,  14,
  15,  16,  17,  18,  19,  20,  21,  22,  23,  24,  25,  26,  27,  28,  29,
  30,  31,  32,  33,  34,  35,  36,  37,  38,  39,  40,  41,  42,  43,  44,
  45,  46,  47,  48,  49,  50,  51,  52,  53,  54,  55,  56,  57,  58,  59,
  60,  61,  62,  63,  64,  65,  66,  67,  68,  69,  70,  71,  72,  73,  74,
  75,  76,  77,  78,  79,  80,  81,  82,  83,  84,  85,  86,  87,  88,  89,
  90,  91,  92,  93,  94,  95,  96,  97,  98,  99,  100, 101, 102, 103, 104,
  105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119,
  120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134,
  135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149,
  150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164,
  165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179,
  180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194,
  195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209,
  210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224,
  225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239,
  240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254,
  255, 256, 257, 258, 259, 260, 261, 262, 263, 264, 265, 266, 267, 268, 269,
  270, 271, 272, 273, 274, 275, 276, 277, 278, 279, 280, 281, 282, 283, 284,
  285, 286, 287, 288, 289, 290, 291, 292, 293, 294, 295, 296, 297, 298, 299,
  300, 301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312, 313, 314,
  315, 316, 317, 318, 319, 320, 321, 322, 323, 324, 325, 326, 327, 328, 329,
  330, 331, 332, 333, 334, 335, 336, 337, 338, 339, 340, 341, 342, 343, 344,
  345, 346, 347, 348, 349, 350, 351, 352, 353, 354, 355, 356, 357, 358, 359,
  360, 361, 362, 363, 364, 365, 366, 367, 368, 369, 370, 371, 372, 373, 374,
  375, 376, 377, 378, 379, 380, 381, 382, 383, 384, 385, 386, 387, 388, 389,
  390, 391, 392, 393, 394, 395, 396, 397, 398, 399, 400, 401, 402, 403, 404,
  405, 406, 407, 408, 409, 410, 411, 412, 413, 414, 415, 416, 417, 418, 419,
  420, 421, 422, 423, 424, 425, 426, 427, 428, 429, 430, 431, 432, 433, 434,
  435, 436, 437, 438, 439, 440, 441, 442, 443, 444, 445, 446, 447, 448, 449,
  450, 451, 452, 453, 454, 455, 456, 457, 458, 459, 460, 461, 462, 463, 464,
  465, 466, 467, 468, 469, 470, 471, 472, 473, 474, 475, 476, 477, 478, 479,
  480, 481, 482, 483, 484, 485, 486, 487, 488, 489, 490, 491, 492, 493, 494,
  495, 496, 497, 498, 499, 500, 501, 502, 503, 504, 505, 506, 507, 508, 509,
  510, 511,
};

#endif  // CONFIG_EXT_TX

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t, av1_mcol_iscan_16x16[256]) = {
  0,  16, 32, 48, 64, 80, 96,  112, 128, 144, 160, 176, 192, 208, 224, 240,
  1,  17, 33, 49, 65, 81, 97,  113, 129, 145, 161, 177, 193, 209, 225, 241,
  2,  18, 34, 50, 66, 82, 98,  114, 130, 146, 162, 178, 194, 210, 226, 242,
  3,  19, 35, 51, 67, 83, 99,  115, 131, 147, 163, 179, 195, 211, 227, 243,
  4,  20, 36, 52, 68, 84, 100, 116, 132, 148, 164, 180, 196, 212, 228, 244,
  5,  21, 37, 53, 69, 85, 101, 117, 133, 149, 165, 181, 197, 213, 229, 245,
  6,  22, 38, 54, 70, 86, 102, 118, 134, 150, 166, 182, 198, 214, 230, 246,
  7,  23, 39, 55, 71, 87, 103, 119, 135, 151, 167, 183, 199, 215, 231, 247,
  8,  24, 40, 56, 72, 88, 104, 120, 136, 152, 168, 184, 200, 216, 232, 248,
  9,  25, 41, 57, 73, 89, 105, 121, 137, 153, 169, 185, 201, 217, 233, 249,
  10, 26, 42, 58, 74, 90, 106, 122, 138, 154, 170, 186, 202, 218, 234, 250,
  11, 27, 43, 59, 75, 91, 107, 123, 139, 155, 171, 187, 203, 219, 235, 251,
  12, 28, 44, 60, 76, 92, 108, 124, 140, 156, 172, 188, 204, 220, 236, 252,
  13, 29, 45, 61, 77, 93, 109, 125, 141, 157, 173, 189, 205, 221, 237, 253,
  14, 30, 46, 62, 78, 94, 110, 126, 142, 158, 174, 190, 206, 222, 238, 254,
  15, 31, 47, 63, 79, 95, 111, 127, 143, 159, 175, 191, 207, 223, 239, 255,
};

DECLARE_ALIGNED(16, static const int16_t, av1_mrow_iscan_16x16[256]) = {
  0,   1,   2,   3,   4,   5,   6,   7,   8,   9,   10,  11,  12,  13,  14,
  15,  16,  17,  18,  19,  20,  21,  22,  23,  24,  25,  26,  27,  28,  29,
  30,  31,  32,  33,  34,  35,  36,  37,  38,  39,  40,  41,  42,  43,  44,
  45,  46,  47,  48,  49,  50,  51,  52,  53,  54,  55,  56,  57,  58,  59,
  60,  61,  62,  63,  64,  65,  66,  67,  68,  69,  70,  71,  72,  73,  74,
  75,  76,  77,  78,  79,  80,  81,  82,  83,  84,  85,  86,  87,  88,  89,
  90,  91,  92,  93,  94,  95,  96,  97,  98,  99,  100, 101, 102, 103, 104,
  105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119,
  120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134,
  135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149,
  150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164,
  165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179,
  180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194,
  195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209,
  210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224,
  225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239,
  240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254,
  255,
};
#endif  // CONFIG_EXT_TX

DECLARE_ALIGNED(16, static const int16_t, av1_col_iscan_16x16[256]) = {
  0,  4,  11,  20,  31,  43,  59,  75,  85,  109, 130, 150, 165, 181, 195, 198,
  1,  6,  14,  23,  34,  47,  64,  81,  95,  114, 135, 153, 171, 188, 201, 212,
  2,  8,  16,  25,  38,  52,  67,  83,  101, 116, 136, 157, 172, 190, 205, 216,
  3,  10, 18,  29,  41,  55,  71,  89,  103, 119, 141, 159, 176, 194, 208, 218,
  5,  12, 21,  32,  45,  58,  74,  93,  104, 123, 144, 164, 179, 196, 210, 223,
  7,  15, 26,  37,  49,  63,  78,  96,  112, 129, 146, 166, 182, 200, 215, 228,
  9,  19, 28,  39,  54,  69,  86,  102, 117, 132, 151, 170, 187, 206, 220, 230,
  13, 24, 35,  46,  60,  73,  91,  108, 122, 137, 154, 174, 189, 207, 224, 235,
  17, 30, 40,  53,  66,  82,  98,  115, 126, 142, 161, 180, 197, 213, 227, 237,
  22, 36, 48,  62,  76,  92,  105, 120, 133, 147, 167, 186, 203, 219, 232, 240,
  27, 44, 56,  70,  84,  99,  113, 127, 140, 156, 175, 193, 209, 226, 236, 244,
  33, 51, 68,  79,  94,  110, 125, 138, 149, 162, 184, 202, 217, 229, 241, 247,
  42, 61, 77,  90,  106, 121, 134, 148, 160, 173, 191, 211, 225, 238, 245, 251,
  50, 72, 87,  100, 118, 128, 145, 158, 168, 183, 204, 222, 233, 242, 249, 253,
  57, 80, 97,  111, 131, 143, 155, 169, 178, 192, 214, 231, 239, 246, 250, 254,
  65, 88, 107, 124, 139, 152, 163, 177, 185, 199, 221, 234, 243, 248, 252, 255,
};

DECLARE_ALIGNED(16, static const int16_t, av1_row_iscan_16x16[256]) = {
  0,   1,   2,   4,   6,   9,   12,  17,  22,  29,  36,  43,  54,  64,  76,
  86,  3,   5,   7,   11,  15,  19,  25,  32,  38,  48,  59,  68,  84,  99,
  115, 130, 8,   10,  13,  18,  23,  27,  33,  42,  51,  60,  72,  88,  103,
  119, 142, 167, 14,  16,  20,  26,  31,  37,  44,  53,  61,  73,  85,  100,
  116, 135, 161, 185, 21,  24,  30,  35,  40,  47,  55,  65,  74,  81,  94,
  112, 133, 154, 179, 205, 28,  34,  39,  45,  50,  58,  67,  77,  87,  96,
  106, 121, 146, 169, 196, 212, 41,  46,  49,  56,  63,  70,  79,  90,  98,
  107, 122, 138, 159, 182, 207, 222, 52,  57,  62,  69,  75,  83,  93,  102,
  110, 120, 134, 150, 176, 195, 215, 226, 66,  71,  78,  82,  91,  97,  108,
  113, 127, 136, 148, 168, 188, 202, 221, 232, 80,  89,  92,  101, 105, 114,
  125, 131, 139, 151, 162, 177, 192, 208, 223, 234, 95,  104, 109, 117, 123,
  128, 143, 144, 155, 165, 175, 190, 206, 219, 233, 239, 111, 118, 124, 129,
  140, 147, 157, 164, 170, 181, 191, 203, 224, 230, 240, 243, 126, 132, 137,
  145, 153, 160, 174, 178, 184, 197, 204, 216, 231, 237, 244, 246, 141, 149,
  156, 166, 172, 180, 189, 199, 200, 210, 220, 228, 238, 242, 249, 251, 152,
  163, 171, 183, 186, 193, 201, 211, 214, 218, 227, 236, 245, 247, 252, 253,
  158, 173, 187, 194, 198, 209, 213, 217, 225, 229, 235, 241, 248, 250, 254,
  255,
};

DECLARE_ALIGNED(16, static const int16_t, av1_default_iscan_16x16[256]) = {
  0,   2,   5,   9,   17,  24,  36,  44,  55,  72,  88,  104, 128, 143, 166,
  179, 1,   4,   8,   13,  20,  30,  40,  54,  66,  79,  96,  113, 141, 154,
  178, 196, 3,   7,   11,  18,  25,  33,  46,  57,  71,  86,  101, 119, 148,
  164, 186, 201, 6,   12,  16,  23,  31,  39,  53,  64,  78,  92,  110, 127,
  153, 169, 193, 208, 10,  14,  19,  28,  37,  47,  58,  67,  84,  98,  114,
  133, 161, 176, 198, 214, 15,  21,  26,  34,  43,  52,  65,  77,  91,  106,
  120, 140, 165, 185, 205, 221, 22,  27,  32,  41,  48,  60,  73,  85,  99,
  116, 130, 151, 175, 190, 211, 225, 29,  35,  42,  49,  59,  69,  81,  95,
  108, 125, 139, 155, 182, 197, 217, 229, 38,  45,  51,  61,  68,  80,  93,
  105, 118, 134, 150, 168, 191, 207, 223, 234, 50,  56,  63,  74,  83,  94,
  109, 117, 129, 147, 163, 177, 199, 213, 228, 238, 62,  70,  76,  87,  97,
  107, 122, 131, 145, 159, 172, 188, 210, 222, 235, 242, 75,  82,  90,  102,
  112, 124, 138, 146, 157, 173, 187, 202, 219, 230, 240, 245, 89,  100, 111,
  123, 132, 142, 156, 167, 180, 189, 203, 216, 231, 237, 246, 250, 103, 115,
  126, 136, 149, 162, 171, 183, 194, 204, 215, 224, 236, 241, 248, 252, 121,
  135, 144, 158, 170, 181, 192, 200, 209, 218, 227, 233, 243, 244, 251, 254,
  137, 152, 160, 174, 184, 195, 206, 212, 220, 226, 232, 239, 247, 249, 253,
  255,
};

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t, av1_mcol_iscan_32x32[1024]) = {
  0,   32,   64,  96,   128, 160,  192, 224,  256, 288,  320, 352,  384, 416,
  448, 480,  512, 544,  576, 608,  640, 672,  704, 736,  768, 800,  832, 864,
  896, 928,  960, 992,  1,   33,   65,  97,   129, 161,  193, 225,  257, 289,
  321, 353,  385, 417,  449, 481,  513, 545,  577, 609,  641, 673,  705, 737,
  769, 801,  833, 865,  897, 929,  961, 993,  2,   34,   66,  98,   130, 162,
  194, 226,  258, 290,  322, 354,  386, 418,  450, 482,  514, 546,  578, 610,
  642, 674,  706, 738,  770, 802,  834, 866,  898, 930,  962, 994,  3,   35,
  67,  99,   131, 163,  195, 227,  259, 291,  323, 355,  387, 419,  451, 483,
  515, 547,  579, 611,  643, 675,  707, 739,  771, 803,  835, 867,  899, 931,
  963, 995,  4,   36,   68,  100,  132, 164,  196, 228,  260, 292,  324, 356,
  388, 420,  452, 484,  516, 548,  580, 612,  644, 676,  708, 740,  772, 804,
  836, 868,  900, 932,  964, 996,  5,   37,   69,  101,  133, 165,  197, 229,
  261, 293,  325, 357,  389, 421,  453, 485,  517, 549,  581, 613,  645, 677,
  709, 741,  773, 805,  837, 869,  901, 933,  965, 997,  6,   38,   70,  102,
  134, 166,  198, 230,  262, 294,  326, 358,  390, 422,  454, 486,  518, 550,
  582, 614,  646, 678,  710, 742,  774, 806,  838, 870,  902, 934,  966, 998,
  7,   39,   71,  103,  135, 167,  199, 231,  263, 295,  327, 359,  391, 423,
  455, 487,  519, 551,  583, 615,  647, 679,  711, 743,  775, 807,  839, 871,
  903, 935,  967, 999,  8,   40,   72,  104,  136, 168,  200, 232,  264, 296,
  328, 360,  392, 424,  456, 488,  520, 552,  584, 616,  648, 680,  712, 744,
  776, 808,  840, 872,  904, 936,  968, 1000, 9,   41,   73,  105,  137, 169,
  201, 233,  265, 297,  329, 361,  393, 425,  457, 489,  521, 553,  585, 617,
  649, 681,  713, 745,  777, 809,  841, 873,  905, 937,  969, 1001, 10,  42,
  74,  106,  138, 170,  202, 234,  266, 298,  330, 362,  394, 426,  458, 490,
  522, 554,  586, 618,  650, 682,  714, 746,  778, 810,  842, 874,  906, 938,
  970, 1002, 11,  43,   75,  107,  139, 171,  203, 235,  267, 299,  331, 363,
  395, 427,  459, 491,  523, 555,  587, 619,  651, 683,  715, 747,  779, 811,
  843, 875,  907, 939,  971, 1003, 12,  44,   76,  108,  140, 172,  204, 236,
  268, 300,  332, 364,  396, 428,  460, 492,  524, 556,  588, 620,  652, 684,
  716, 748,  780, 812,  844, 876,  908, 940,  972, 1004, 13,  45,   77,  109,
  141, 173,  205, 237,  269, 301,  333, 365,  397, 429,  461, 493,  525, 557,
  589, 621,  653, 685,  717, 749,  781, 813,  845, 877,  909, 941,  973, 1005,
  14,  46,   78,  110,  142, 174,  206, 238,  270, 302,  334, 366,  398, 430,
  462, 494,  526, 558,  590, 622,  654, 686,  718, 750,  782, 814,  846, 878,
  910, 942,  974, 1006, 15,  47,   79,  111,  143, 175,  207, 239,  271, 303,
  335, 367,  399, 431,  463, 495,  527, 559,  591, 623,  655, 687,  719, 751,
  783, 815,  847, 879,  911, 943,  975, 1007, 16,  48,   80,  112,  144, 176,
  208, 240,  272, 304,  336, 368,  400, 432,  464, 496,  528, 560,  592, 624,
  656, 688,  720, 752,  784, 816,  848, 880,  912, 944,  976, 1008, 17,  49,
  81,  113,  145, 177,  209, 241,  273, 305,  337, 369,  401, 433,  465, 497,
  529, 561,  593, 625,  657, 689,  721, 753,  785, 817,  849, 881,  913, 945,
  977, 1009, 18,  50,   82,  114,  146, 178,  210, 242,  274, 306,  338, 370,
  402, 434,  466, 498,  530, 562,  594, 626,  658, 690,  722, 754,  786, 818,
  850, 882,  914, 946,  978, 1010, 19,  51,   83,  115,  147, 179,  211, 243,
  275, 307,  339, 371,  403, 435,  467, 499,  531, 563,  595, 627,  659, 691,
  723, 755,  787, 819,  851, 883,  915, 947,  979, 1011, 20,  52,   84,  116,
  148, 180,  212, 244,  276, 308,  340, 372,  404, 436,  468, 500,  532, 564,
  596, 628,  660, 692,  724, 756,  788, 820,  852, 884,  916, 948,  980, 1012,
  21,  53,   85,  117,  149, 181,  213, 245,  277, 309,  341, 373,  405, 437,
  469, 501,  533, 565,  597, 629,  661, 693,  725, 757,  789, 821,  853, 885,
  917, 949,  981, 1013, 22,  54,   86,  118,  150, 182,  214, 246,  278, 310,
  342, 374,  406, 438,  470, 502,  534, 566,  598, 630,  662, 694,  726, 758,
  790, 822,  854, 886,  918, 950,  982, 1014, 23,  55,   87,  119,  151, 183,
  215, 247,  279, 311,  343, 375,  407, 439,  471, 503,  535, 567,  599, 631,
  663, 695,  727, 759,  791, 823,  855, 887,  919, 951,  983, 1015, 24,  56,
  88,  120,  152, 184,  216, 248,  280, 312,  344, 376,  408, 440,  472, 504,
  536, 568,  600, 632,  664, 696,  728, 760,  792, 824,  856, 888,  920, 952,
  984, 1016, 25,  57,   89,  121,  153, 185,  217, 249,  281, 313,  345, 377,
  409, 441,  473, 505,  537, 569,  601, 633,  665, 697,  729, 761,  793, 825,
  857, 889,  921, 953,  985, 1017, 26,  58,   90,  122,  154, 186,  218, 250,
  282, 314,  346, 378,  410, 442,  474, 506,  538, 570,  602, 634,  666, 698,
  730, 762,  794, 826,  858, 890,  922, 954,  986, 1018, 27,  59,   91,  123,
  155, 187,  219, 251,  283, 315,  347, 379,  411, 443,  475, 507,  539, 571,
  603, 635,  667, 699,  731, 763,  795, 827,  859, 891,  923, 955,  987, 1019,
  28,  60,   92,  124,  156, 188,  220, 252,  284, 316,  348, 380,  412, 444,
  476, 508,  540, 572,  604, 636,  668, 700,  732, 764,  796, 828,  860, 892,
  924, 956,  988, 1020, 29,  61,   93,  125,  157, 189,  221, 253,  285, 317,
  349, 381,  413, 445,  477, 509,  541, 573,  605, 637,  669, 701,  733, 765,
  797, 829,  861, 893,  925, 957,  989, 1021, 30,  62,   94,  126,  158, 190,
  222, 254,  286, 318,  350, 382,  414, 446,  478, 510,  542, 574,  606, 638,
  670, 702,  734, 766,  798, 830,  862, 894,  926, 958,  990, 1022, 31,  63,
  95,  127,  159, 191,  223, 255,  287, 319,  351, 383,  415, 447,  479, 511,
  543, 575,  607, 639,  671, 703,  735, 767,  799, 831,  863, 895,  927, 959,
  991, 1023,
};

DECLARE_ALIGNED(16, static const int16_t, av1_mrow_iscan_32x32[1024]) = {
  0,    1,    2,    3,    4,    5,    6,    7,    8,    9,    10,   11,   12,
  13,   14,   15,   16,   17,   18,   19,   20,   21,   22,   23,   24,   25,
  26,   27,   28,   29,   30,   31,   32,   33,   34,   35,   36,   37,   38,
  39,   40,   41,   42,   43,   44,   45,   46,   47,   48,   49,   50,   51,
  52,   53,   54,   55,   56,   57,   58,   59,   60,   61,   62,   63,   64,
  65,   66,   67,   68,   69,   70,   71,   72,   73,   74,   75,   76,   77,
  78,   79,   80,   81,   82,   83,   84,   85,   86,   87,   88,   89,   90,
  91,   92,   93,   94,   95,   96,   97,   98,   99,   100,  101,  102,  103,
  104,  105,  106,  107,  108,  109,  110,  111,  112,  113,  114,  115,  116,
  117,  118,  119,  120,  121,  122,  123,  124,  125,  126,  127,  128,  129,
  130,  131,  132,  133,  134,  135,  136,  137,  138,  139,  140,  141,  142,
  143,  144,  145,  146,  147,  148,  149,  150,  151,  152,  153,  154,  155,
  156,  157,  158,  159,  160,  161,  162,  163,  164,  165,  166,  167,  168,
  169,  170,  171,  172,  173,  174,  175,  176,  177,  178,  179,  180,  181,
  182,  183,  184,  185,  186,  187,  188,  189,  190,  191,  192,  193,  194,
  195,  196,  197,  198,  199,  200,  201,  202,  203,  204,  205,  206,  207,
  208,  209,  210,  211,  212,  213,  214,  215,  216,  217,  218,  219,  220,
  221,  222,  223,  224,  225,  226,  227,  228,  229,  230,  231,  232,  233,
  234,  235,  236,  237,  238,  239,  240,  241,  242,  243,  244,  245,  246,
  247,  248,  249,  250,  251,  252,  253,  254,  255,  256,  257,  258,  259,
  260,  261,  262,  263,  264,  265,  266,  267,  268,  269,  270,  271,  272,
  273,  274,  275,  276,  277,  278,  279,  280,  281,  282,  283,  284,  285,
  286,  287,  288,  289,  290,  291,  292,  293,  294,  295,  296,  297,  298,
  299,  300,  301,  302,  303,  304,  305,  306,  307,  308,  309,  310,  311,
  312,  313,  314,  315,  316,  317,  318,  319,  320,  321,  322,  323,  324,
  325,  326,  327,  328,  329,  330,  331,  332,  333,  334,  335,  336,  337,
  338,  339,  340,  341,  342,  343,  344,  345,  346,  347,  348,  349,  350,
  351,  352,  353,  354,  355,  356,  357,  358,  359,  360,  361,  362,  363,
  364,  365,  366,  367,  368,  369,  370,  371,  372,  373,  374,  375,  376,
  377,  378,  379,  380,  381,  382,  383,  384,  385,  386,  387,  388,  389,
  390,  391,  392,  393,  394,  395,  396,  397,  398,  399,  400,  401,  402,
  403,  404,  405,  406,  407,  408,  409,  410,  411,  412,  413,  414,  415,
  416,  417,  418,  419,  420,  421,  422,  423,  424,  425,  426,  427,  428,
  429,  430,  431,  432,  433,  434,  435,  436,  437,  438,  439,  440,  441,
  442,  443,  444,  445,  446,  447,  448,  449,  450,  451,  452,  453,  454,
  455,  456,  457,  458,  459,  460,  461,  462,  463,  464,  465,  466,  467,
  468,  469,  470,  471,  472,  473,  474,  475,  476,  477,  478,  479,  480,
  481,  482,  483,  484,  485,  486,  487,  488,  489,  490,  491,  492,  493,
  494,  495,  496,  497,  498,  499,  500,  501,  502,  503,  504,  505,  506,
  507,  508,  509,  510,  511,  512,  513,  514,  515,  516,  517,  518,  519,
  520,  521,  522,  523,  524,  525,  526,  527,  528,  529,  530,  531,  532,
  533,  534,  535,  536,  537,  538,  539,  540,  541,  542,  543,  544,  545,
  546,  547,  548,  549,  550,  551,  552,  553,  554,  555,  556,  557,  558,
  559,  560,  561,  562,  563,  564,  565,  566,  567,  568,  569,  570,  571,
  572,  573,  574,  575,  576,  577,  578,  579,  580,  581,  582,  583,  584,
  585,  586,  587,  588,  589,  590,  591,  592,  593,  594,  595,  596,  597,
  598,  599,  600,  601,  602,  603,  604,  605,  606,  607,  608,  609,  610,
  611,  612,  613,  614,  615,  616,  617,  618,  619,  620,  621,  622,  623,
  624,  625,  626,  627,  628,  629,  630,  631,  632,  633,  634,  635,  636,
  637,  638,  639,  640,  641,  642,  643,  644,  645,  646,  647,  648,  649,
  650,  651,  652,  653,  654,  655,  656,  657,  658,  659,  660,  661,  662,
  663,  664,  665,  666,  667,  668,  669,  670,  671,  672,  673,  674,  675,
  676,  677,  678,  679,  680,  681,  682,  683,  684,  685,  686,  687,  688,
  689,  690,  691,  692,  693,  694,  695,  696,  697,  698,  699,  700,  701,
  702,  703,  704,  705,  706,  707,  708,  709,  710,  711,  712,  713,  714,
  715,  716,  717,  718,  719,  720,  721,  722,  723,  724,  725,  726,  727,
  728,  729,  730,  731,  732,  733,  734,  735,  736,  737,  738,  739,  740,
  741,  742,  743,  744,  745,  746,  747,  748,  749,  750,  751,  752,  753,
  754,  755,  756,  757,  758,  759,  760,  761,  762,  763,  764,  765,  766,
  767,  768,  769,  770,  771,  772,  773,  774,  775,  776,  777,  778,  779,
  780,  781,  782,  783,  784,  785,  786,  787,  788,  789,  790,  791,  792,
  793,  794,  795,  796,  797,  798,  799,  800,  801,  802,  803,  804,  805,
  806,  807,  808,  809,  810,  811,  812,  813,  814,  815,  816,  817,  818,
  819,  820,  821,  822,  823,  824,  825,  826,  827,  828,  829,  830,  831,
  832,  833,  834,  835,  836,  837,  838,  839,  840,  841,  842,  843,  844,
  845,  846,  847,  848,  849,  850,  851,  852,  853,  854,  855,  856,  857,
  858,  859,  860,  861,  862,  863,  864,  865,  866,  867,  868,  869,  870,
  871,  872,  873,  874,  875,  876,  877,  878,  879,  880,  881,  882,  883,
  884,  885,  886,  887,  888,  889,  890,  891,  892,  893,  894,  895,  896,
  897,  898,  899,  900,  901,  902,  903,  904,  905,  906,  907,  908,  909,
  910,  911,  912,  913,  914,  915,  916,  917,  918,  919,  920,  921,  922,
  923,  924,  925,  926,  927,  928,  929,  930,  931,  932,  933,  934,  935,
  936,  937,  938,  939,  940,  941,  942,  943,  944,  945,  946,  947,  948,
  949,  950,  951,  952,  953,  954,  955,  956,  957,  958,  959,  960,  961,
  962,  963,  964,  965,  966,  967,  968,  969,  970,  971,  972,  973,  974,
  975,  976,  977,  978,  979,  980,  981,  982,  983,  984,  985,  986,  987,
  988,  989,  990,  991,  992,  993,  994,  995,  996,  997,  998,  999,  1000,
  1001, 1002, 1003, 1004, 1005, 1006, 1007, 1008, 1009, 1010, 1011, 1012, 1013,
  1014, 1015, 1016, 1017, 1018, 1019, 1020, 1021, 1022, 1023,
};
#endif  // CONFIG_EXT_TX

DECLARE_ALIGNED(16, static const int16_t, av1_default_iscan_32x32[1024]) = {
  0,    2,    5,    10,   17,   25,   38,   47,   62,   83,   101,  121,  145,
  170,  193,  204,  210,  219,  229,  233,  245,  257,  275,  299,  342,  356,
  377,  405,  455,  471,  495,  527,  1,    4,    8,    15,   22,   30,   45,
  58,   74,   92,   112,  133,  158,  184,  203,  215,  222,  228,  234,  237,
  256,  274,  298,  317,  355,  376,  404,  426,  470,  494,  526,  551,  3,
  7,    12,   18,   28,   36,   52,   64,   82,   102,  118,  142,  164,  189,
  208,  217,  224,  231,  235,  238,  273,  297,  316,  329,  375,  403,  425,
  440,  493,  525,  550,  567,  6,    11,   16,   23,   31,   43,   60,   73,
  90,   109,  126,  150,  173,  196,  211,  220,  226,  232,  236,  239,  296,
  315,  328,  335,  402,  424,  439,  447,  524,  549,  566,  575,  9,    14,
  19,   29,   37,   50,   65,   78,   95,   116,  134,  157,  179,  201,  214,
  223,  244,  255,  272,  295,  341,  354,  374,  401,  454,  469,  492,  523,
  582,  596,  617,  645,  13,   20,   26,   35,   44,   54,   72,   85,   105,
  123,  140,  163,  182,  205,  216,  225,  254,  271,  294,  314,  353,  373,
  400,  423,  468,  491,  522,  548,  595,  616,  644,  666,  21,   27,   33,
  42,   53,   63,   80,   94,   113,  132,  151,  172,  190,  209,  218,  227,
  270,  293,  313,  327,  372,  399,  422,  438,  490,  521,  547,  565,  615,
  643,  665,  680,  24,   32,   39,   48,   57,   71,   88,   104,  120,  139,
  159,  178,  197,  212,  221,  230,  292,  312,  326,  334,  398,  421,  437,
  446,  520,  546,  564,  574,  642,  664,  679,  687,  34,   40,   46,   56,
  68,   81,   96,   111,  130,  147,  167,  186,  243,  253,  269,  291,  340,
  352,  371,  397,  453,  467,  489,  519,  581,  594,  614,  641,  693,  705,
  723,  747,  41,   49,   55,   67,   77,   91,   107,  124,  138,  161,  177,
  194,  252,  268,  290,  311,  351,  370,  396,  420,  466,  488,  518,  545,
  593,  613,  640,  663,  704,  722,  746,  765,  51,   59,   66,   76,   89,
  99,   119,  131,  149,  168,  181,  200,  267,  289,  310,  325,  369,  395,
  419,  436,  487,  517,  544,  563,  612,  639,  662,  678,  721,  745,  764,
  777,  61,   69,   75,   87,   100,  114,  129,  144,  162,  180,  191,  207,
  288,  309,  324,  333,  394,  418,  435,  445,  516,  543,  562,  573,  638,
  661,  677,  686,  744,  763,  776,  783,  70,   79,   86,   97,   108,  122,
  137,  155,  242,  251,  266,  287,  339,  350,  368,  393,  452,  465,  486,
  515,  580,  592,  611,  637,  692,  703,  720,  743,  788,  798,  813,  833,
  84,   93,   103,  110,  125,  141,  154,  171,  250,  265,  286,  308,  349,
  367,  392,  417,  464,  485,  514,  542,  591,  610,  636,  660,  702,  719,
  742,  762,  797,  812,  832,  848,  98,   106,  115,  127,  143,  156,  169,
  185,  264,  285,  307,  323,  366,  391,  416,  434,  484,  513,  541,  561,
  609,  635,  659,  676,  718,  741,  761,  775,  811,  831,  847,  858,  117,
  128,  136,  148,  160,  175,  188,  198,  284,  306,  322,  332,  390,  415,
  433,  444,  512,  540,  560,  572,  634,  658,  675,  685,  740,  760,  774,
  782,  830,  846,  857,  863,  135,  146,  152,  165,  241,  249,  263,  283,
  338,  348,  365,  389,  451,  463,  483,  511,  579,  590,  608,  633,  691,
  701,  717,  739,  787,  796,  810,  829,  867,  875,  887,  903,  153,  166,
  174,  183,  248,  262,  282,  305,  347,  364,  388,  414,  462,  482,  510,
  539,  589,  607,  632,  657,  700,  716,  738,  759,  795,  809,  828,  845,
  874,  886,  902,  915,  176,  187,  195,  202,  261,  281,  304,  321,  363,
  387,  413,  432,  481,  509,  538,  559,  606,  631,  656,  674,  715,  737,
  758,  773,  808,  827,  844,  856,  885,  901,  914,  923,  192,  199,  206,
  213,  280,  303,  320,  331,  386,  412,  431,  443,  508,  537,  558,  571,
  630,  655,  673,  684,  736,  757,  772,  781,  826,  843,  855,  862,  900,
  913,  922,  927,  240,  247,  260,  279,  337,  346,  362,  385,  450,  461,
  480,  507,  578,  588,  605,  629,  690,  699,  714,  735,  786,  794,  807,
  825,  866,  873,  884,  899,  930,  936,  945,  957,  246,  259,  278,  302,
  345,  361,  384,  411,  460,  479,  506,  536,  587,  604,  628,  654,  698,
  713,  734,  756,  793,  806,  824,  842,  872,  883,  898,  912,  935,  944,
  956,  966,  258,  277,  301,  319,  360,  383,  410,  430,  478,  505,  535,
  557,  603,  627,  653,  672,  712,  733,  755,  771,  805,  823,  841,  854,
  882,  897,  911,  921,  943,  955,  965,  972,  276,  300,  318,  330,  382,
  409,  429,  442,  504,  534,  556,  570,  626,  652,  671,  683,  732,  754,
  770,  780,  822,  840,  853,  861,  896,  910,  920,  926,  954,  964,  971,
  975,  336,  344,  359,  381,  449,  459,  477,  503,  577,  586,  602,  625,
  689,  697,  711,  731,  785,  792,  804,  821,  865,  871,  881,  895,  929,
  934,  942,  953,  977,  981,  987,  995,  343,  358,  380,  408,  458,  476,
  502,  533,  585,  601,  624,  651,  696,  710,  730,  753,  791,  803,  820,
  839,  870,  880,  894,  909,  933,  941,  952,  963,  980,  986,  994,  1001,
  357,  379,  407,  428,  475,  501,  532,  555,  600,  623,  650,  670,  709,
  729,  752,  769,  802,  819,  838,  852,  879,  893,  908,  919,  940,  951,
  962,  970,  985,  993,  1000, 1005, 378,  406,  427,  441,  500,  531,  554,
  569,  622,  649,  669,  682,  728,  751,  768,  779,  818,  837,  851,  860,
  892,  907,  918,  925,  950,  961,  969,  974,  992,  999,  1004, 1007, 448,
  457,  474,  499,  576,  584,  599,  621,  688,  695,  708,  727,  784,  790,
  801,  817,  864,  869,  878,  891,  928,  932,  939,  949,  976,  979,  984,
  991,  1008, 1010, 1013, 1017, 456,  473,  498,  530,  583,  598,  620,  648,
  694,  707,  726,  750,  789,  800,  816,  836,  868,  877,  890,  906,  931,
  938,  948,  960,  978,  983,  990,  998,  1009, 1012, 1016, 1020, 472,  497,
  529,  553,  597,  619,  647,  668,  706,  725,  749,  767,  799,  815,  835,
  850,  876,  889,  905,  917,  937,  947,  959,  968,  982,  989,  997,  1003,
  1011, 1015, 1019, 1022, 496,  528,  552,  568,  618,  646,  667,  681,  724,
  748,  766,  778,  814,  834,  849,  859,  888,  904,  916,  924,  946,  958,
  967,  973,  988,  996,  1002, 1006, 1014, 1018, 1021, 1023,
};

#if CONFIG_EXT_TX
DECLARE_ALIGNED(16, static const int16_t, av1_v2_iscan_32x32[1024]) = {
  0,    1,    4,    9,    15,   22,   33,   43,   56,   71,   86,   104,  121,
  142,  166,  189,  512,  518,  527,  539,  551,  566,  584,  602,  621,  644,
  668,  695,  721,  748,  780,  811,  2,    3,    6,    11,   17,   26,   35,
  45,   58,   73,   90,   106,  123,  146,  168,  193,  513,  519,  528,  540,
  553,  567,  585,  603,  622,  647,  670,  696,  722,  751,  783,  812,  5,
  7,    8,    13,   20,   28,   37,   50,   62,   75,   92,   108,  129,  150,
  170,  195,  514,  521,  530,  541,  554,  569,  587,  605,  625,  649,  671,
  699,  725,  752,  785,  815,  10,   12,   14,   19,   23,   31,   41,   52,
  65,   81,   96,   113,  133,  152,  175,  201,  515,  522,  531,  542,  556,
  572,  589,  607,  629,  651,  673,  700,  726,  757,  788,  819,  16,   18,
  21,   24,   30,   39,   48,   59,   69,   83,   100,  119,  137,  158,  181,
  203,  516,  523,  534,  545,  559,  574,  591,  610,  632,  654,  679,  704,
  730,  762,  791,  824,  25,   27,   29,   32,   40,   46,   54,   67,   79,
  94,   109,  127,  143,  164,  185,  210,  517,  525,  535,  547,  561,  578,
  595,  615,  635,  656,  684,  707,  737,  766,  793,  830,  34,   36,   38,
  42,   49,   55,   64,   76,   87,   102,  117,  135,  154,  176,  197,  219,
  520,  529,  538,  550,  565,  580,  598,  618,  639,  664,  687,  712,  741,
  769,  802,  833,  44,   47,   51,   53,   60,   68,   77,   85,   98,   114,
  131,  147,  162,  183,  208,  227,  524,  533,  544,  557,  571,  588,  606,
  623,  645,  667,  692,  720,  747,  776,  806,  838,  57,   61,   63,   66,
  70,   80,   88,   99,   112,  124,  140,  159,  179,  199,  216,  233,  526,
  536,  548,  562,  577,  593,  613,  633,  653,  676,  701,  727,  756,  786,
  814,  847,  72,   74,   78,   82,   84,   95,   103,  115,  125,  139,  156,
  173,  190,  211,  229,  246,  532,  543,  555,  568,  581,  601,  619,  637,
  663,  685,  709,  738,  763,  792,  826,  855,  89,   91,   93,   97,   101,
  110,  118,  132,  141,  157,  171,  186,  206,  224,  241,  255,  537,  549,
  560,  576,  592,  608,  628,  650,  669,  693,  719,  744,  773,  805,  834,
  862,  105,  107,  111,  116,  120,  128,  136,  148,  160,  174,  187,  205,
  221,  236,  251,  267,  546,  558,  570,  583,  600,  617,  636,  657,  680,
  706,  729,  758,  787,  813,  846,  871,  122,  126,  130,  134,  138,  144,
  155,  163,  180,  191,  207,  222,  232,  248,  264,  278,  552,  564,  579,
  594,  609,  630,  648,  666,  688,  715,  742,  768,  797,  827,  856,  877,
  145,  149,  151,  153,  161,  165,  177,  184,  200,  212,  225,  237,  249,
  262,  275,  289,  563,  575,  590,  604,  620,  638,  660,  683,  705,  728,
  753,  779,  809,  839,  866,  889,  167,  169,  172,  178,  182,  188,  198,
  209,  217,  230,  242,  252,  265,  276,  288,  301,  573,  586,  599,  616,
  634,  652,  672,  694,  716,  743,  767,  794,  825,  850,  874,  899,  192,
  194,  196,  202,  204,  213,  220,  228,  234,  247,  256,  268,  279,  290,
  302,  315,  582,  597,  614,  631,  646,  665,  686,  708,  732,  759,  784,
  810,  837,  863,  886,  908,  214,  215,  218,  223,  226,  231,  239,  244,
  253,  261,  271,  283,  292,  304,  317,  325,  596,  611,  626,  642,  661,
  681,  702,  723,  745,  770,  800,  828,  853,  875,  897,  919,  235,  238,
  240,  243,  245,  250,  257,  263,  270,  280,  287,  298,  307,  319,  329,
  340,  612,  624,  640,  658,  677,  697,  717,  739,  764,  789,  816,  844,
  867,  890,  909,  927,  254,  258,  259,  260,  266,  269,  272,  282,  286,
  296,  303,  312,  323,  333,  341,  355,  627,  641,  655,  674,  690,  713,
  735,  760,  781,  807,  835,  857,  880,  902,  921,  940,  273,  274,  277,
  281,  284,  285,  291,  299,  305,  310,  320,  327,  337,  346,  357,  369,
  643,  659,  675,  689,  710,  733,  754,  777,  803,  831,  851,  872,  892,
  913,  934,  950,  293,  294,  295,  297,  300,  306,  308,  314,  321,  326,
  335,  343,  352,  361,  372,  378,  662,  678,  691,  711,  731,  749,  774,
  798,  822,  848,  869,  887,  906,  925,  942,  961,  309,  311,  313,  316,
  318,  322,  324,  332,  338,  344,  351,  358,  367,  375,  386,  394,  682,
  698,  714,  734,  750,  772,  795,  820,  842,  864,  884,  904,  923,  938,
  954,  967,  328,  330,  331,  334,  336,  339,  342,  348,  354,  359,  366,
  374,  382,  391,  400,  409,  703,  718,  736,  755,  775,  796,  818,  840,
  860,  882,  900,  917,  936,  952,  965,  977,  345,  347,  349,  350,  353,
  356,  360,  364,  371,  376,  383,  389,  395,  406,  412,  423,  724,  740,
  761,  778,  799,  821,  841,  859,  878,  895,  915,  932,  948,  963,  975,
  986,  362,  363,  365,  368,  370,  373,  377,  379,  387,  392,  397,  405,
  411,  420,  428,  439,  746,  765,  782,  804,  823,  843,  861,  879,  894,
  911,  930,  946,  959,  973,  984,  994,  380,  381,  384,  385,  388,  390,
  393,  396,  403,  408,  413,  422,  427,  436,  444,  452,  771,  790,  808,
  832,  849,  865,  883,  896,  912,  928,  944,  957,  971,  982,  992,  1001,
  398,  399,  401,  402,  404,  407,  410,  414,  419,  425,  429,  437,  442,
  449,  458,  465,  801,  817,  836,  852,  870,  885,  901,  916,  931,  945,
  956,  969,  980,  990,  999,  1007, 415,  416,  417,  418,  421,  424,  426,
  430,  434,  441,  445,  453,  459,  463,  473,  480,  829,  845,  858,  873,
  888,  905,  918,  933,  947,  958,  970,  979,  988,  997,  1005, 1012, 431,
  432,  433,  435,  438,  440,  443,  446,  451,  456,  461,  468,  475,  479,
  488,  494,  854,  868,  881,  893,  907,  924,  937,  949,  960,  972,  981,
  989,  996,  1003, 1010, 1016, 447,  448,  450,  454,  455,  457,  460,  462,
  469,  472,  477,  482,  490,  495,  499,  503,  876,  891,  903,  914,  926,
  939,  953,  964,  974,  983,  991,  998,  1004, 1009, 1014, 1019, 464,  466,
  467,  470,  471,  474,  476,  478,  484,  489,  493,  497,  501,  504,  506,
  508,  898,  910,  922,  935,  943,  955,  966,  976,  985,  993,  1000, 1006,
  1011, 1015, 1018, 1021, 481,  483,  485,  486,  487,  491,  492,  496,  498,
  500,  502,  505,  507,  509,  510,  511,  920,  929,  941,  951,  962,  968,
  978,  987,  995,  1002, 1008, 1013, 1017, 1020, 1022, 1023,
};

DECLARE_ALIGNED(16, static const int16_t, av1_h2_iscan_32x32[1024]) = {
  0,    1,    4,    9,    15,   22,   33,   43,   56,   71,   86,   104,  121,
  142,  166,  189,  214,  233,  254,  273,  292,  309,  328,  345,  362,  378,
  397,  415,  431,  447,  464,  481,  2,    3,    6,    11,   17,   26,   35,
  45,   58,   73,   90,   106,  123,  146,  168,  193,  215,  236,  255,  274,
  294,  310,  329,  346,  363,  381,  399,  416,  432,  448,  465,  482,  5,
  7,    8,    13,   20,   28,   37,   50,   62,   75,   92,   108,  129,  150,
  170,  195,  216,  240,  259,  275,  295,  312,  331,  348,  365,  383,  400,
  417,  433,  449,  467,  485,  10,   12,   14,   19,   23,   31,   41,   52,
  65,   81,   96,   113,  133,  152,  175,  201,  221,  243,  260,  280,  297,
  315,  333,  350,  367,  385,  402,  418,  434,  452,  470,  486,  16,   18,
  21,   24,   30,   39,   48,   59,   69,   83,   100,  119,  137,  158,  181,
  203,  226,  244,  264,  283,  300,  318,  335,  353,  370,  388,  404,  420,
  438,  455,  471,  487,  25,   27,   29,   32,   40,   46,   54,   67,   79,
  94,   109,  127,  143,  164,  185,  210,  231,  250,  269,  285,  304,  322,
  339,  356,  373,  389,  407,  423,  440,  457,  473,  491,  34,   36,   38,
  42,   49,   55,   64,   76,   87,   102,  117,  135,  154,  176,  197,  219,
  239,  256,  272,  291,  308,  324,  341,  359,  377,  393,  410,  426,  442,
  460,  476,  492,  44,   47,   51,   53,   60,   68,   77,   85,   98,   114,
  131,  147,  162,  183,  208,  227,  245,  262,  282,  298,  314,  332,  349,
  364,  379,  396,  412,  430,  446,  462,  478,  495,  57,   61,   63,   66,
  70,   80,   88,   99,   112,  124,  140,  159,  179,  199,  217,  234,  253,
  270,  286,  305,  321,  337,  354,  371,  387,  403,  419,  435,  451,  468,
  484,  498,  72,   74,   78,   82,   84,   95,   103,  115,  125,  139,  156,
  173,  190,  211,  229,  246,  261,  281,  296,  311,  325,  344,  360,  375,
  392,  408,  425,  441,  456,  472,  489,  500,  89,   91,   93,   97,   101,
  110,  118,  132,  141,  157,  171,  186,  206,  224,  241,  257,  271,  287,
  303,  320,  336,  351,  366,  384,  398,  413,  429,  445,  461,  477,  493,
  502,  105,  107,  111,  116,  120,  128,  136,  148,  160,  174,  187,  205,
  222,  237,  251,  267,  284,  299,  313,  327,  343,  358,  374,  390,  405,
  422,  437,  453,  469,  483,  497,  505,  122,  126,  130,  134,  138,  144,
  155,  163,  180,  191,  207,  223,  232,  248,  265,  278,  293,  307,  323,
  338,  352,  368,  382,  395,  411,  427,  443,  459,  475,  490,  501,  507,
  145,  149,  151,  153,  161,  165,  177,  184,  200,  212,  225,  238,  249,
  263,  276,  289,  306,  319,  334,  347,  361,  376,  391,  406,  421,  436,
  450,  463,  479,  496,  504,  509,  167,  169,  172,  178,  182,  188,  198,
  209,  218,  230,  242,  252,  266,  277,  288,  301,  317,  330,  342,  357,
  372,  386,  401,  414,  428,  444,  458,  474,  488,  499,  506,  510,  192,
  194,  196,  202,  204,  213,  220,  228,  235,  247,  258,  268,  279,  290,
  302,  316,  326,  340,  355,  369,  380,  394,  409,  424,  439,  454,  466,
  480,  494,  503,  508,  511,  512,  513,  514,  515,  516,  517,  520,  523,
  526,  532,  537,  545,  551,  561,  573,  581,  596,  610,  625,  642,  661,
  680,  701,  722,  745,  770,  800,  827,  853,  875,  897,  919,  518,  519,
  521,  522,  524,  525,  528,  533,  536,  542,  549,  557,  564,  575,  585,
  597,  611,  623,  640,  656,  676,  696,  717,  739,  763,  789,  815,  844,
  867,  889,  909,  927,  527,  529,  530,  531,  534,  535,  538,  544,  548,
  555,  560,  569,  579,  589,  598,  614,  626,  641,  655,  673,  690,  712,
  735,  760,  780,  806,  834,  857,  880,  902,  921,  940,  539,  540,  541,
  543,  546,  547,  550,  558,  562,  567,  576,  583,  593,  603,  616,  631,
  643,  657,  674,  689,  710,  733,  752,  776,  803,  830,  850,  872,  892,
  913,  934,  950,  552,  553,  554,  556,  559,  563,  565,  571,  577,  582,
  591,  600,  609,  620,  634,  644,  662,  677,  691,  711,  730,  748,  773,
  798,  822,  847,  869,  887,  906,  925,  942,  961,  566,  568,  570,  572,
  574,  578,  580,  588,  594,  601,  608,  617,  629,  637,  652,  665,  681,
  697,  713,  734,  749,  772,  793,  819,  842,  863,  884,  904,  923,  938,
  954,  967,  584,  586,  587,  590,  592,  595,  599,  605,  613,  618,  628,
  636,  648,  660,  671,  686,  702,  718,  736,  753,  774,  794,  818,  840,
  860,  882,  900,  917,  936,  952,  965,  977,  602,  604,  606,  607,  612,
  615,  619,  624,  633,  638,  649,  658,  666,  683,  692,  707,  723,  740,
  761,  777,  799,  820,  841,  859,  877,  895,  915,  932,  948,  963,  975,
  986,  621,  622,  627,  630,  632,  635,  639,  645,  653,  663,  668,  682,
  688,  704,  716,  732,  746,  764,  781,  804,  823,  843,  861,  878,  894,
  911,  930,  946,  959,  973,  984,  994,  646,  647,  650,  651,  654,  659,
  664,  667,  678,  685,  693,  706,  715,  728,  743,  757,  771,  790,  807,
  831,  848,  864,  883,  896,  912,  928,  944,  957,  971,  982,  992,  1001,
  669,  670,  672,  675,  679,  684,  687,  694,  703,  709,  719,  729,  741,
  754,  767,  783,  801,  816,  835,  851,  870,  885,  901,  916,  931,  945,
  956,  969,  980,  990,  999,  1007, 695,  698,  699,  700,  705,  708,  714,
  720,  726,  738,  744,  758,  768,  779,  795,  810,  828,  845,  858,  873,
  888,  905,  918,  933,  947,  958,  970,  979,  988,  997,  1005, 1012, 721,
  724,  725,  727,  731,  737,  742,  747,  756,  765,  775,  786,  797,  809,
  825,  837,  854,  868,  881,  893,  907,  924,  937,  949,  960,  972,  981,
  989,  996,  1003, 1010, 1016, 750,  751,  755,  759,  762,  766,  769,  778,
  787,  792,  805,  812,  829,  838,  852,  865,  876,  890,  903,  914,  926,
  939,  953,  964,  974,  983,  991,  998,  1004, 1009, 1014, 1019, 782,  784,
  785,  788,  791,  796,  802,  808,  814,  826,  836,  846,  856,  866,  874,
  886,  898,  910,  922,  935,  943,  955,  966,  976,  985,  993,  1000, 1006,
  1011, 1015, 1018, 1021, 811,  813,  817,  821,  824,  832,  833,  839,  849,
  855,  862,  871,  879,  891,  899,  908,  920,  929,  941,  951,  962,  968,
  978,  987,  995,  1002, 1008, 1013, 1017, 1020, 1022, 1023,
};

DECLARE_ALIGNED(16, static const int16_t, av1_qtr_iscan_32x32[1024]) = {
  0,    1,    4,    9,    15,   22,   33,   43,   56,   71,   86,   104,  121,
  142,  166,  189,  256,  268,  286,  310,  334,  364,  400,  435,  471,  510,
  553,  598,  640,  683,  732,  780,  2,    3,    6,    11,   17,   26,   35,
  45,   58,   73,   90,   106,  123,  146,  168,  193,  258,  270,  288,  312,
  338,  366,  402,  437,  473,  516,  557,  600,  642,  687,  736,  782,  5,
  7,    8,    13,   20,   28,   37,   50,   62,   75,   92,   108,  129,  150,
  170,  195,  260,  274,  292,  314,  340,  370,  406,  441,  478,  520,  559,
  604,  646,  689,  740,  788,  10,   12,   14,   19,   23,   31,   41,   52,
  65,   81,   96,   113,  133,  152,  175,  201,  262,  276,  294,  316,  344,
  376,  410,  445,  484,  524,  563,  606,  648,  697,  746,  793,  16,   18,
  21,   24,   30,   39,   48,   59,   69,   83,   100,  119,  137,  158,  181,
  203,  264,  278,  300,  322,  350,  380,  414,  451,  490,  530,  571,  612,
  656,  705,  750,  799,  25,   27,   29,   32,   40,   46,   54,   67,   79,
  94,   109,  127,  143,  164,  185,  210,  266,  282,  302,  326,  354,  388,
  422,  459,  496,  533,  579,  618,  665,  711,  754,  809,  34,   36,   38,
  42,   49,   55,   64,   76,   87,   102,  117,  135,  154,  176,  197,  216,
  272,  289,  308,  332,  362,  392,  427,  465,  504,  545,  585,  626,  671,
  717,  766,  813,  44,   47,   51,   53,   60,   68,   77,   85,   98,   114,
  131,  147,  162,  183,  208,  222,  279,  298,  320,  346,  374,  408,  442,
  475,  511,  551,  592,  638,  681,  726,  772,  821,  57,   61,   63,   66,
  70,   80,   88,   99,   112,  124,  140,  159,  179,  199,  214,  227,  284,
  304,  328,  355,  386,  418,  455,  492,  528,  567,  608,  649,  695,  742,
  786,  833,  72,   74,   78,   82,   84,   95,   103,  115,  125,  139,  156,
  173,  190,  211,  224,  233,  296,  317,  342,  367,  394,  433,  466,  500,
  543,  581,  622,  667,  707,  752,  803,  843,  89,   91,   93,   97,   101,
  110,  118,  132,  141,  157,  171,  186,  206,  220,  231,  239,  306,  330,
  352,  384,  415,  447,  482,  521,  554,  593,  636,  677,  722,  770,  815,
  852,  105,  107,  111,  116,  120,  128,  136,  148,  160,  174,  187,  205,
  218,  229,  237,  244,  323,  347,  371,  398,  431,  463,  498,  534,  573,
  616,  654,  698,  743,  783,  831,  864,  122,  126,  130,  134,  138,  144,
  155,  163,  180,  191,  207,  219,  226,  235,  242,  248,  335,  360,  390,
  419,  449,  485,  518,  549,  587,  630,  672,  715,  760,  805,  845,  872,
  145,  149,  151,  153,  161,  165,  177,  184,  200,  212,  221,  230,  236,
  241,  246,  251,  356,  382,  411,  438,  469,  501,  539,  577,  613,  652,
  690,  730,  776,  822,  858,  886,  167,  169,  172,  178,  182,  188,  198,
  209,  215,  225,  232,  238,  243,  247,  250,  253,  378,  403,  428,  461,
  494,  526,  560,  594,  632,  675,  713,  755,  801,  837,  868,  897,  192,
  194,  196,  202,  204,  213,  217,  223,  228,  234,  240,  245,  249,  252,
  254,  255,  395,  425,  457,  488,  512,  547,  583,  619,  659,  699,  737,
  778,  819,  854,  882,  907,  257,  259,  261,  263,  265,  267,  273,  280,
  285,  297,  307,  324,  336,  357,  379,  396,  424,  452,  479,  508,  541,
  574,  609,  643,  679,  719,  764,  806,  841,  870,  895,  919,  269,  271,
  275,  277,  281,  283,  290,  299,  305,  318,  331,  348,  361,  383,  404,
  426,  453,  476,  506,  535,  568,  601,  634,  669,  708,  748,  789,  829,
  860,  887,  909,  927,  287,  291,  293,  295,  301,  303,  309,  321,  329,
  343,  353,  372,  391,  412,  429,  458,  480,  507,  532,  564,  590,  627,
  663,  703,  733,  773,  816,  847,  876,  901,  921,  940,  311,  313,  315,
  319,  325,  327,  333,  349,  358,  368,  385,  399,  420,  439,  462,  489,
  509,  536,  565,  589,  624,  661,  691,  727,  768,  810,  838,  866,  890,
  913,  934,  950,  337,  339,  341,  345,  351,  359,  363,  375,  387,  397,
  416,  432,  450,  470,  495,  513,  542,  569,  591,  625,  657,  684,  723,
  762,  797,  834,  862,  884,  905,  925,  942,  961,  365,  369,  373,  377,
  381,  389,  393,  409,  421,  434,  448,  464,  486,  502,  527,  548,  575,
  602,  628,  662,  685,  721,  756,  794,  827,  855,  880,  903,  923,  938,
  954,  967,  401,  405,  407,  413,  417,  423,  430,  443,  456,  467,  483,
  499,  519,  540,  561,  584,  610,  635,  664,  692,  724,  757,  792,  825,
  850,  878,  899,  917,  936,  952,  965,  977,  436,  440,  444,  446,  454,
  460,  468,  477,  493,  503,  522,  537,  550,  578,  595,  620,  644,  670,
  704,  728,  763,  795,  826,  849,  873,  893,  915,  932,  948,  963,  975,
  986,  472,  474,  481,  487,  491,  497,  505,  514,  529,  544,  555,  576,
  588,  614,  633,  660,  680,  709,  734,  769,  798,  828,  851,  874,  892,
  911,  930,  946,  959,  973,  984,  994,  515,  517,  523,  525,  531,  538,
  546,  552,  570,  582,  596,  617,  631,  653,  676,  700,  720,  749,  774,
  811,  835,  856,  879,  894,  912,  928,  944,  957,  971,  982,  992,  1001,
  556,  558,  562,  566,  572,  580,  586,  597,  611,  623,  637,  655,  673,
  693,  714,  738,  765,  790,  817,  839,  863,  881,  900,  916,  931,  945,
  956,  969,  980,  990,  999,  1007, 599,  603,  605,  607,  615,  621,  629,
  639,  650,  668,  678,  701,  716,  731,  758,  779,  807,  830,  848,  867,
  885,  904,  918,  933,  947,  958,  970,  979,  988,  997,  1005, 1012, 641,
  645,  647,  651,  658,  666,  674,  682,  696,  710,  725,  744,  761,  777,
  802,  820,  842,  861,  877,  891,  906,  924,  937,  949,  960,  972,  981,
  989,  996,  1003, 1010, 1016, 686,  688,  694,  702,  706,  712,  718,  729,
  745,  753,  771,  784,  808,  823,  840,  857,  871,  888,  902,  914,  926,
  939,  953,  964,  974,  983,  991,  998,  1004, 1009, 1014, 1019, 735,  739,
  741,  747,  751,  759,  767,  775,  787,  804,  818,  832,  846,  859,  869,
  883,  896,  910,  922,  935,  943,  955,  966,  976,  985,  993,  1000, 1006,
  1011, 1015, 1018, 1021, 781,  785,  791,  796,  800,  812,  814,  824,  836,
  844,  853,  865,  875,  889,  898,  908,  920,  929,  941,  951,  962,  968,
  978,  987,  995,  1002, 1008, 1013, 1017, 1020, 1022, 1023,
};
#endif  // CONFIG_EXT_TX

const SCAN_ORDER av1_default_scan_orders[TX_SIZES] = {
#if CONFIG_CB4X4
  { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
#endif
  { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
  { default_scan_8x8, av1_default_iscan_8x8, default_scan_8x8_neighbors },
  { default_scan_16x16, av1_default_iscan_16x16, default_scan_16x16_neighbors },
  { default_scan_32x32, av1_default_iscan_32x32, default_scan_32x32_neighbors },
};

const SCAN_ORDER av1_intra_scan_orders[TX_SIZES][TX_TYPES] = {
#if CONFIG_CB4X4
  {
      // TX_2X2
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { row_scan_4x4, av1_row_iscan_4x4, row_scan_4x4_neighbors },
      { col_scan_4x4, av1_col_iscan_4x4, col_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
#if CONFIG_EXT_TX
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { mrow_scan_4x4, av1_mrow_iscan_4x4, mrow_scan_4x4_neighbors },
      { row_scan_4x4, av1_row_iscan_4x4, row_scan_4x4_neighbors },
      { col_scan_4x4, av1_col_iscan_4x4, col_scan_4x4_neighbors },
      { row_scan_4x4, av1_row_iscan_4x4, row_scan_4x4_neighbors },
      { col_scan_4x4, av1_col_iscan_4x4, col_scan_4x4_neighbors },
      { row_scan_4x4, av1_row_iscan_4x4, row_scan_4x4_neighbors },
      { col_scan_4x4, av1_col_iscan_4x4, col_scan_4x4_neighbors },
#endif  // CONFIG_EXT_TX
  },
#endif
  {
      // TX_4X4
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { row_scan_4x4, av1_row_iscan_4x4, row_scan_4x4_neighbors },
      { col_scan_4x4, av1_col_iscan_4x4, col_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
#if CONFIG_EXT_TX
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { mrow_scan_4x4, av1_mrow_iscan_4x4, mrow_scan_4x4_neighbors },
      { row_scan_4x4, av1_row_iscan_4x4, row_scan_4x4_neighbors },
      { col_scan_4x4, av1_col_iscan_4x4, col_scan_4x4_neighbors },
      { row_scan_4x4, av1_row_iscan_4x4, row_scan_4x4_neighbors },
      { col_scan_4x4, av1_col_iscan_4x4, col_scan_4x4_neighbors },
      { row_scan_4x4, av1_row_iscan_4x4, row_scan_4x4_neighbors },
      { col_scan_4x4, av1_col_iscan_4x4, col_scan_4x4_neighbors },
#endif  // CONFIG_EXT_TX
  },
  {
      // TX_8X8
      { default_scan_8x8, av1_default_iscan_8x8, default_scan_8x8_neighbors },
      { row_scan_8x8, av1_row_iscan_8x8, row_scan_8x8_neighbors },
      { col_scan_8x8, av1_col_iscan_8x8, col_scan_8x8_neighbors },
      { default_scan_8x8, av1_default_iscan_8x8, default_scan_8x8_neighbors },
#if CONFIG_EXT_TX
      { default_scan_8x8, av1_default_iscan_8x8, default_scan_8x8_neighbors },
      { default_scan_8x8, av1_default_iscan_8x8, default_scan_8x8_neighbors },
      { default_scan_8x8, av1_default_iscan_8x8, default_scan_8x8_neighbors },
      { default_scan_8x8, av1_default_iscan_8x8, default_scan_8x8_neighbors },
      { default_scan_8x8, av1_default_iscan_8x8, default_scan_8x8_neighbors },
      { mrow_scan_8x8, av1_mrow_iscan_8x8, mrow_scan_8x8_neighbors },
      { row_scan_8x8, av1_row_iscan_8x8, row_scan_8x8_neighbors },
      { col_scan_8x8, av1_col_iscan_8x8, col_scan_8x8_neighbors },
      { row_scan_8x8, av1_row_iscan_8x8, row_scan_8x8_neighbors },
      { col_scan_8x8, av1_col_iscan_8x8, col_scan_8x8_neighbors },
      { row_scan_8x8, av1_row_iscan_8x8, row_scan_8x8_neighbors },
      { col_scan_8x8, av1_col_iscan_8x8, col_scan_8x8_neighbors },
#endif  // CONFIG_EXT_TX
  },
  {
      // TX_16X16
      { default_scan_16x16, av1_default_iscan_16x16,
        default_scan_16x16_neighbors },
      { row_scan_16x16, av1_row_iscan_16x16, row_scan_16x16_neighbors },
      { col_scan_16x16, av1_col_iscan_16x16, col_scan_16x16_neighbors },
      { default_scan_16x16, av1_default_iscan_16x16,
        default_scan_16x16_neighbors },
#if CONFIG_EXT_TX
      { default_scan_16x16, av1_default_iscan_16x16,
        default_scan_16x16_neighbors },
      { default_scan_16x16, av1_default_iscan_16x16,
        default_scan_16x16_neighbors },
      { default_scan_16x16, av1_default_iscan_16x16,
        default_scan_16x16_neighbors },
      { default_scan_16x16, av1_default_iscan_16x16,
        default_scan_16x16_neighbors },
      { default_scan_16x16, av1_default_iscan_16x16,
        default_scan_16x16_neighbors },
      { mrow_scan_16x16, av1_mrow_iscan_16x16, mrow_scan_16x16_neighbors },
      { row_scan_16x16, av1_row_iscan_16x16, row_scan_16x16_neighbors },
      { col_scan_16x16, av1_col_iscan_16x16, col_scan_16x16_neighbors },
      { row_scan_16x16, av1_row_iscan_16x16, row_scan_16x16_neighbors },
      { col_scan_16x16, av1_col_iscan_16x16, col_scan_16x16_neighbors },
      { row_scan_16x16, av1_row_iscan_16x16, row_scan_16x16_neighbors },
      { col_scan_16x16, av1_col_iscan_16x16, col_scan_16x16_neighbors },
#endif  // CONFIG_EXT_TX
  },
  {
      // TX_32X32
      { default_scan_32x32, av1_default_iscan_32x32,
        default_scan_32x32_neighbors },
#if CONFIG_EXT_TX
      { h2_scan_32x32, av1_h2_iscan_32x32, h2_scan_32x32_neighbors },
      { v2_scan_32x32, av1_v2_iscan_32x32, v2_scan_32x32_neighbors },
      { qtr_scan_32x32, av1_qtr_iscan_32x32, qtr_scan_32x32_neighbors },
      { h2_scan_32x32, av1_h2_iscan_32x32, h2_scan_32x32_neighbors },
      { v2_scan_32x32, av1_v2_iscan_32x32, v2_scan_32x32_neighbors },
      { qtr_scan_32x32, av1_qtr_iscan_32x32, qtr_scan_32x32_neighbors },
      { qtr_scan_32x32, av1_qtr_iscan_32x32, qtr_scan_32x32_neighbors },
      { qtr_scan_32x32, av1_qtr_iscan_32x32, qtr_scan_32x32_neighbors },
      { mrow_scan_32x32, av1_mrow_iscan_32x32, mrow_scan_32x32_neighbors },
      { mrow_scan_32x32, av1_mrow_iscan_32x32, mrow_scan_32x32_neighbors },
      { mcol_scan_32x32, av1_mcol_iscan_32x32, mcol_scan_32x32_neighbors },
      { mrow_scan_32x32, av1_mrow_iscan_32x32, mrow_scan_32x32_neighbors },
      { mcol_scan_32x32, av1_mcol_iscan_32x32, mcol_scan_32x32_neighbors },
      { mrow_scan_32x32, av1_mrow_iscan_32x32, mrow_scan_32x32_neighbors },
      { mcol_scan_32x32, av1_mcol_iscan_32x32, mcol_scan_32x32_neighbors },
#endif  // CONFIG_EXT_TX
  }
};

const SCAN_ORDER av1_inter_scan_orders[TX_SIZES_ALL][TX_TYPES] = {
#if CONFIG_CB4X4
  {
      // TX_2X2
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
#if CONFIG_EXT_TX
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { mrow_scan_4x4, av1_mrow_iscan_4x4, mrow_scan_4x4_neighbors },
      { mrow_scan_4x4, av1_mrow_iscan_4x4, mrow_scan_4x4_neighbors },
      { mcol_scan_4x4, av1_mcol_iscan_4x4, mcol_scan_4x4_neighbors },
      { mrow_scan_4x4, av1_mrow_iscan_4x4, mrow_scan_4x4_neighbors },
      { mcol_scan_4x4, av1_mcol_iscan_4x4, mcol_scan_4x4_neighbors },
      { mrow_scan_4x4, av1_mrow_iscan_4x4, mrow_scan_4x4_neighbors },
      { mcol_scan_4x4, av1_mcol_iscan_4x4, mcol_scan_4x4_neighbors },
#endif  // CONFIG_EXT_TX
  },
#endif
  {
      // TX_4X4
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
#if CONFIG_EXT_TX
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { default_scan_4x4, av1_default_iscan_4x4, default_scan_4x4_neighbors },
      { mrow_scan_4x4, av1_mrow_iscan_4x4, mrow_scan_4x4_neighbors },
      { mrow_scan_4x4, av1_mrow_iscan_4x4, mrow_scan_4x4_neighbors },
      { mcol_scan_4x4, av1_mcol_iscan_4x4, mcol_scan_4x4_neighbors },
      { mrow_scan_4x4, av1_mrow_iscan_4x4, mrow_scan_4x4_neighbors },
      { mcol_scan_4x4, av1_mcol_iscan_4x4, mcol_scan_4x4_neighbors },
      { mrow_scan_4x4, av1_mrow_iscan_4x4, mrow_scan_4x4_neighbors },
      { mcol_scan_4x4, av1_mcol_iscan_4x4, mcol_scan_4x4_neighbors },
#endif  // CONFIG_EXT_TX
  },
  {
      // TX_8X8
      { default_scan_8x8, av1_default_iscan_8x8, default_scan_8x8_neighbors },
      { default_scan_8x8, av1_default_iscan_8x8, default_scan_8x8_neighbors },
      { default_scan_8x8, av1_default_iscan_8x8, default_scan_8x8_neighbors },
      { default_scan_8x8, av1_default_iscan_8x8, default_scan_8x8_neighbors },
#if CONFIG_EXT_TX
      { default_scan_8x8, av1_default_iscan_8x8, default_scan_8x8_neighbors },
      { default_scan_8x8, av1_default_iscan_8x8, default_scan_8x8_neighbors },
      { default_scan_8x8, av1_default_iscan_8x8, default_scan_8x8_neighbors },
      { default_scan_8x8, av1_default_iscan_8x8, default_scan_8x8_neighbors },
      { default_scan_8x8, av1_default_iscan_8x8, default_scan_8x8_neighbors },
      { mrow_scan_8x8, av1_mrow_iscan_8x8, mrow_scan_8x8_neighbors },
      { mrow_scan_8x8, av1_mrow_iscan_8x8, mrow_scan_8x8_neighbors },
      { mcol_scan_8x8, av1_mcol_iscan_8x8, mcol_scan_8x8_neighbors },
      { mrow_scan_8x8, av1_mrow_iscan_8x8, mrow_scan_8x8_neighbors },
      { mcol_scan_8x8, av1_mcol_iscan_8x8, mcol_scan_8x8_neighbors },
      { mrow_scan_8x8, av1_mrow_iscan_8x8, mrow_scan_8x8_neighbors },
      { mcol_scan_8x8, av1_mcol_iscan_8x8, mcol_scan_8x8_neighbors },
#endif  // CONFIG_EXT_TX
  },
  {
      // TX_16X16
      { default_scan_16x16, av1_default_iscan_16x16,
        default_scan_16x16_neighbors },
      { default_scan_16x16, av1_default_iscan_16x16,
        default_scan_16x16_neighbors },
      { default_scan_16x16, av1_default_iscan_16x16,
        default_scan_16x16_neighbors },
      { default_scan_16x16, av1_default_iscan_16x16,
        default_scan_16x16_neighbors },
#if CONFIG_EXT_TX
      { default_scan_16x16, av1_default_iscan_16x16,
        default_scan_16x16_neighbors },
      { default_scan_16x16, av1_default_iscan_16x16,
        default_scan_16x16_neighbors },
      { default_scan_16x16, av1_default_iscan_16x16,
        default_scan_16x16_neighbors },
      { default_scan_16x16, av1_default_iscan_16x16,
        default_scan_16x16_neighbors },
      { default_scan_16x16, av1_default_iscan_16x16,
        default_scan_16x16_neighbors },
      { mrow_scan_16x16, av1_mrow_iscan_16x16, mrow_scan_16x16_neighbors },
      { mrow_scan_16x16, av1_mrow_iscan_16x16, mrow_scan_16x16_neighbors },
      { mcol_scan_16x16, av1_mcol_iscan_16x16, mcol_scan_16x16_neighbors },
      { mrow_scan_16x16, av1_mrow_iscan_16x16, mrow_scan_16x16_neighbors },
      { mcol_scan_16x16, av1_mcol_iscan_16x16, mcol_scan_16x16_neighbors },
      { mrow_scan_16x16, av1_mrow_iscan_16x16, mrow_scan_16x16_neighbors },
      { mcol_scan_16x16, av1_mcol_iscan_16x16, mcol_scan_16x16_neighbors },
#endif  // CONFIG_EXT_TX
  },
  {
      // TX_32X32
      { default_scan_32x32, av1_default_iscan_32x32,
        default_scan_32x32_neighbors },
#if CONFIG_EXT_TX
      { h2_scan_32x32, av1_h2_iscan_32x32, h2_scan_32x32_neighbors },
      { v2_scan_32x32, av1_v2_iscan_32x32, v2_scan_32x32_neighbors },
      { qtr_scan_32x32, av1_qtr_iscan_32x32, qtr_scan_32x32_neighbors },
      { h2_scan_32x32, av1_h2_iscan_32x32, h2_scan_32x32_neighbors },
      { v2_scan_32x32, av1_v2_iscan_32x32, v2_scan_32x32_neighbors },
      { qtr_scan_32x32, av1_qtr_iscan_32x32, qtr_scan_32x32_neighbors },
      { qtr_scan_32x32, av1_qtr_iscan_32x32, qtr_scan_32x32_neighbors },
      { qtr_scan_32x32, av1_qtr_iscan_32x32, qtr_scan_32x32_neighbors },
      { mrow_scan_32x32, av1_mrow_iscan_32x32, mrow_scan_32x32_neighbors },
      { mrow_scan_32x32, av1_mrow_iscan_32x32, mrow_scan_32x32_neighbors },
      { mcol_scan_32x32, av1_mcol_iscan_32x32, mcol_scan_32x32_neighbors },
      { mrow_scan_32x32, av1_mrow_iscan_32x32, mrow_scan_32x32_neighbors },
      { mcol_scan_32x32, av1_mcol_iscan_32x32, mcol_scan_32x32_neighbors },
      { mrow_scan_32x32, av1_mrow_iscan_32x32, mrow_scan_32x32_neighbors },
      { mcol_scan_32x32, av1_mcol_iscan_32x32, mcol_scan_32x32_neighbors },
#endif  // CONFIG_EXT_TX
  },
  {
      // TX_4X8
      { default_scan_4x8, av1_default_iscan_4x8, default_scan_4x8_neighbors },
      { default_scan_4x8, av1_default_iscan_4x8, default_scan_4x8_neighbors },
      { default_scan_4x8, av1_default_iscan_4x8, default_scan_4x8_neighbors },
      { default_scan_4x8, av1_default_iscan_4x8, default_scan_4x8_neighbors },
#if CONFIG_EXT_TX
      { default_scan_4x8, av1_default_iscan_4x8, default_scan_4x8_neighbors },
      { default_scan_4x8, av1_default_iscan_4x8, default_scan_4x8_neighbors },
      { default_scan_4x8, av1_default_iscan_4x8, default_scan_4x8_neighbors },
      { default_scan_4x8, av1_default_iscan_4x8, default_scan_4x8_neighbors },
      { default_scan_4x8, av1_default_iscan_4x8, default_scan_4x8_neighbors },
      { mrow_scan_4x8, av1_mrow_iscan_4x8, mrow_scan_4x8_neighbors },
      { mrow_scan_4x8, av1_mrow_iscan_4x8, mrow_scan_4x8_neighbors },
      { mcol_scan_4x8, av1_mcol_iscan_4x8, mcol_scan_4x8_neighbors },
      { mrow_scan_4x8, av1_mrow_iscan_4x8, mrow_scan_4x8_neighbors },
      { mcol_scan_4x8, av1_mcol_iscan_4x8, mcol_scan_4x8_neighbors },
      { mrow_scan_4x8, av1_mrow_iscan_4x8, mrow_scan_4x8_neighbors },
      { mcol_scan_4x8, av1_mcol_iscan_4x8, mcol_scan_4x8_neighbors },
#endif  // CONFIG_EXT_TX
  },
  {
      // TX_8X4
      { default_scan_8x4, av1_default_iscan_8x4, default_scan_8x4_neighbors },
      { default_scan_8x4, av1_default_iscan_8x4, default_scan_8x4_neighbors },
      { default_scan_8x4, av1_default_iscan_8x4, default_scan_8x4_neighbors },
      { default_scan_8x4, av1_default_iscan_8x4, default_scan_8x4_neighbors },
#if CONFIG_EXT_TX
      { default_scan_8x4, av1_default_iscan_8x4, default_scan_8x4_neighbors },
      { default_scan_8x4, av1_default_iscan_8x4, default_scan_8x4_neighbors },
      { default_scan_8x4, av1_default_iscan_8x4, default_scan_8x4_neighbors },
      { default_scan_8x4, av1_default_iscan_8x4, default_scan_8x4_neighbors },
      { default_scan_8x4, av1_default_iscan_8x4, default_scan_8x4_neighbors },
      { mrow_scan_8x4, av1_mrow_iscan_8x4, mrow_scan_8x4_neighbors },
      { mrow_scan_8x4, av1_mrow_iscan_8x4, mrow_scan_8x4_neighbors },
      { mcol_scan_8x4, av1_mcol_iscan_8x4, mcol_scan_8x4_neighbors },
      { mrow_scan_8x4, av1_mrow_iscan_8x4, mrow_scan_8x4_neighbors },
      { mcol_scan_8x4, av1_mcol_iscan_8x4, mcol_scan_8x4_neighbors },
      { mrow_scan_8x4, av1_mrow_iscan_8x4, mrow_scan_8x4_neighbors },
      { mcol_scan_8x4, av1_mcol_iscan_8x4, mcol_scan_8x4_neighbors },
#endif  // CONFIG_EXT_TX
  },
  {
      // TX_8X16
      { default_scan_8x16, av1_default_iscan_8x16,
        default_scan_8x16_neighbors },
      { default_scan_8x16, av1_default_iscan_8x16,
        default_scan_8x16_neighbors },
      { default_scan_8x16, av1_default_iscan_8x16,
        default_scan_8x16_neighbors },
      { default_scan_8x16, av1_default_iscan_8x16,
        default_scan_8x16_neighbors },
#if CONFIG_EXT_TX
      { default_scan_8x16, av1_default_iscan_8x16,
        default_scan_8x16_neighbors },
      { default_scan_8x16, av1_default_iscan_8x16,
        default_scan_8x16_neighbors },
      { default_scan_8x16, av1_default_iscan_8x16,
        default_scan_8x16_neighbors },
      { default_scan_8x16, av1_default_iscan_8x16,
        default_scan_8x16_neighbors },
      { default_scan_8x16, av1_default_iscan_8x16,
        default_scan_8x16_neighbors },
      { mrow_scan_8x16, av1_mrow_iscan_8x16, mrow_scan_8x16_neighbors },
      { mrow_scan_8x16, av1_mrow_iscan_8x16, mrow_scan_8x16_neighbors },
      { mcol_scan_8x16, av1_mcol_iscan_8x16, mcol_scan_8x16_neighbors },
      { mrow_scan_8x16, av1_mrow_iscan_8x16, mrow_scan_8x16_neighbors },
      { mcol_scan_8x16, av1_mcol_iscan_8x16, mcol_scan_8x16_neighbors },
      { mrow_scan_8x16, av1_mrow_iscan_8x16, mrow_scan_8x16_neighbors },
      { mcol_scan_8x16, av1_mcol_iscan_8x16, mcol_scan_8x16_neighbors },
#endif  // CONFIG_EXT_TX
  },
  {
      // TX_16X8
      { default_scan_16x8, av1_default_iscan_16x8,
        default_scan_16x8_neighbors },
      { default_scan_16x8, av1_default_iscan_16x8,
        default_scan_16x8_neighbors },
      { default_scan_16x8, av1_default_iscan_16x8,
        default_scan_16x8_neighbors },
      { default_scan_16x8, av1_default_iscan_16x8,
        default_scan_16x8_neighbors },
#if CONFIG_EXT_TX
      { default_scan_16x8, av1_default_iscan_16x8,
        default_scan_16x8_neighbors },
      { default_scan_16x8, av1_default_iscan_16x8,
        default_scan_16x8_neighbors },
      { default_scan_16x8, av1_default_iscan_16x8,
        default_scan_16x8_neighbors },
      { default_scan_16x8, av1_default_iscan_16x8,
        default_scan_16x8_neighbors },
      { default_scan_16x8, av1_default_iscan_16x8,
        default_scan_16x8_neighbors },
      { mrow_scan_16x8, av1_mrow_iscan_16x8, mrow_scan_16x8_neighbors },
      { mrow_scan_16x8, av1_mrow_iscan_16x8, mrow_scan_16x8_neighbors },
      { mcol_scan_16x8, av1_mcol_iscan_16x8, mcol_scan_16x8_neighbors },
      { mrow_scan_16x8, av1_mrow_iscan_16x8, mrow_scan_16x8_neighbors },
      { mcol_scan_16x8, av1_mcol_iscan_16x8, mcol_scan_16x8_neighbors },
      { mrow_scan_16x8, av1_mrow_iscan_16x8, mrow_scan_16x8_neighbors },
      { mcol_scan_16x8, av1_mcol_iscan_16x8, mcol_scan_16x8_neighbors },
#endif  // CONFIG_EXT_TX
  },
  {
      // TX_16X32
      { default_scan_16x32, av1_default_iscan_16x32,
        default_scan_16x32_neighbors },
      { default_scan_16x32, av1_default_iscan_16x32,
        default_scan_16x32_neighbors },
      { default_scan_16x32, av1_default_iscan_16x32,
        default_scan_16x32_neighbors },
      { default_scan_16x32, av1_default_iscan_16x32,
        default_scan_16x32_neighbors },
#if CONFIG_EXT_TX
      { default_scan_16x32, av1_default_iscan_16x32,
        default_scan_16x32_neighbors },
      { default_scan_16x32, av1_default_iscan_16x32,
        default_scan_16x32_neighbors },
      { default_scan_16x32, av1_default_iscan_16x32,
        default_scan_16x32_neighbors },
      { default_scan_16x32, av1_default_iscan_16x32,
        default_scan_16x32_neighbors },
      { default_scan_16x32, av1_default_iscan_16x32,
        default_scan_16x32_neighbors },
      { mrow_scan_16x32, av1_mrow_iscan_16x32, mrow_scan_16x32_neighbors },
      { mrow_scan_16x32, av1_mrow_iscan_16x32, mrow_scan_16x32_neighbors },
      { mcol_scan_16x32, av1_mcol_iscan_16x32, mcol_scan_16x32_neighbors },
      { mrow_scan_16x32, av1_mrow_iscan_16x32, mrow_scan_16x32_neighbors },
      { mcol_scan_16x32, av1_mcol_iscan_16x32, mcol_scan_16x32_neighbors },
      { mrow_scan_16x32, av1_mrow_iscan_16x32, mrow_scan_16x32_neighbors },
      { mcol_scan_16x32, av1_mcol_iscan_16x32, mcol_scan_16x32_neighbors },
#endif  // CONFIG_EXT_TX
  },
  {
      // TX_32X16
      { default_scan_32x16, av1_default_iscan_32x16,
        default_scan_32x16_neighbors },
      { default_scan_32x16, av1_default_iscan_32x16,
        default_scan_32x16_neighbors },
      { default_scan_32x16, av1_default_iscan_32x16,
        default_scan_32x16_neighbors },
      { default_scan_32x16, av1_default_iscan_32x16,
        default_scan_32x16_neighbors },
#if CONFIG_EXT_TX
      { default_scan_32x16, av1_default_iscan_32x16,
        default_scan_32x16_neighbors },
      { default_scan_32x16, av1_default_iscan_32x16,
        default_scan_32x16_neighbors },
      { default_scan_32x16, av1_default_iscan_32x16,
        default_scan_32x16_neighbors },
      { default_scan_32x16, av1_default_iscan_32x16,
        default_scan_32x16_neighbors },
      { default_scan_32x16, av1_default_iscan_32x16,
        default_scan_32x16_neighbors },
      { mrow_scan_32x16, av1_mrow_iscan_32x16, mrow_scan_32x16_neighbors },
      { mrow_scan_32x16, av1_mrow_iscan_32x16, mrow_scan_32x16_neighbors },
      { mcol_scan_32x16, av1_mcol_iscan_32x16, mcol_scan_32x16_neighbors },
      { mrow_scan_32x16, av1_mrow_iscan_32x16, mrow_scan_32x16_neighbors },
      { mcol_scan_32x16, av1_mcol_iscan_32x16, mcol_scan_32x16_neighbors },
      { mrow_scan_32x16, av1_mrow_iscan_32x16, mrow_scan_32x16_neighbors },
      { mcol_scan_32x16, av1_mcol_iscan_32x16, mcol_scan_32x16_neighbors },
#endif  // CONFIG_EXT_TX
  }
};

#if CONFIG_ADAPT_SCAN
// TX_32X32 will has 1024 coefficients whose indexes can be represented in 10
// bits
#define COEFF_IDX_BITS 10
#define COEFF_IDX_SIZE (1 << COEFF_IDX_BITS)
#define COEFF_IDX_MASK (COEFF_IDX_SIZE - 1)

static uint32_t *get_non_zero_prob(FRAME_CONTEXT *fc, TX_SIZE tx_size,
                                   TX_TYPE tx_type) {
  switch (tx_size) {
    case TX_4X4: return fc->non_zero_prob_4X4[tx_type];
    case TX_8X8: return fc->non_zero_prob_8X8[tx_type];
    case TX_16X16: return fc->non_zero_prob_16X16[tx_type];
    case TX_32X32: return fc->non_zero_prob_32X32[tx_type];
    default: assert(0); return NULL;
  }
}

static int16_t *get_adapt_scan(FRAME_CONTEXT *fc, TX_SIZE tx_size,
                               TX_TYPE tx_type) {
  switch (tx_size) {
    case TX_4X4: return fc->scan_4X4[tx_type];
    case TX_8X8: return fc->scan_8X8[tx_type];
    case TX_16X16: return fc->scan_16X16[tx_type];
    case TX_32X32: return fc->scan_32X32[tx_type];
    default: assert(0); return NULL;
  }
}

static int16_t *get_adapt_iscan(FRAME_CONTEXT *fc, TX_SIZE tx_size,
                                TX_TYPE tx_type) {
  switch (tx_size) {
    case TX_4X4: return fc->iscan_4X4[tx_type];
    case TX_8X8: return fc->iscan_8X8[tx_type];
    case TX_16X16: return fc->iscan_16X16[tx_type];
    case TX_32X32: return fc->iscan_32X32[tx_type];
    default: assert(0); return NULL;
  }
}

static int16_t *get_adapt_nb(FRAME_CONTEXT *fc, TX_SIZE tx_size,
                             TX_TYPE tx_type) {
  switch (tx_size) {
    case TX_4X4: return fc->nb_4X4[tx_type];
    case TX_8X8: return fc->nb_8X8[tx_type];
    case TX_16X16: return fc->nb_16X16[tx_type];
    case TX_32X32: return fc->nb_32X32[tx_type];
    default: assert(0); return NULL;
  }
}

static uint32_t *get_non_zero_counts(FRAME_COUNTS *counts, TX_SIZE tx_size,
                                     TX_TYPE tx_type) {
  switch (tx_size) {
    case TX_4X4: return counts->non_zero_count_4X4[tx_type];
    case TX_8X8: return counts->non_zero_count_8X8[tx_type];
    case TX_16X16: return counts->non_zero_count_16X16[tx_type];
    case TX_32X32: return counts->non_zero_count_32X32[tx_type];
    default: assert(0); return NULL;
  }
}

void av1_update_scan_prob(AV1_COMMON *cm, TX_SIZE tx_size, TX_TYPE tx_type,
                          int rate_16) {
  FRAME_CONTEXT *pre_fc = &cm->frame_contexts[cm->frame_context_idx];
  uint32_t *prev_non_zero_prob = get_non_zero_prob(pre_fc, tx_size, tx_type);
  uint32_t *non_zero_prob = get_non_zero_prob(cm->fc, tx_size, tx_type);
  uint32_t *non_zero_count = get_non_zero_counts(&cm->counts, tx_size, tx_type);
  const int tx2d_size = tx_size_2d[tx_size];
  unsigned int block_num = cm->counts.txb_count[tx_size][tx_type];
  int i;
  for (i = 0; i < tx2d_size; i++) {
    int64_t curr_prob =
        block_num == 0 ? 0 : (non_zero_count[i] << 16) / block_num;
    int64_t prev_prob = prev_non_zero_prob[i];
    int64_t pred_prob =
        (curr_prob * rate_16 + prev_prob * ((1 << 16) - rate_16)) >> 16;
    non_zero_prob[i] = clamp(pred_prob, 0, UINT16_MAX);
  }
}

static void update_scan_count(int16_t *scan, int max_scan,
                              const tran_low_t *dqcoeffs,
                              uint32_t *non_zero_count) {
  int i;
  for (i = 0; i < max_scan; ++i) {
    int coeff_idx = scan[i];
    non_zero_count[coeff_idx] += (dqcoeffs[coeff_idx] != 0);
  }
}

void av1_update_scan_count_facade(AV1_COMMON *cm, TX_SIZE tx_size,
                                  TX_TYPE tx_type, const tran_low_t *dqcoeffs,
                                  int max_scan) {
  int16_t *scan = get_adapt_scan(cm->fc, tx_size, tx_type);
  uint32_t *non_zero_count = get_non_zero_counts(&cm->counts, tx_size, tx_type);
  update_scan_count(scan, max_scan, dqcoeffs, non_zero_count);
  ++cm->counts.txb_count[tx_size][tx_type];
}

static int cmp_prob(const void *a, const void *b) {
  return *(const uint32_t *)b > *(const uint32_t *)a ? 1 : -1;
}

void av1_augment_prob(uint32_t *prob, int size, int tx1d_size) {
  int r, c;
  for (r = 0; r < size; r++) {
    for (c = 0; c < size; c++) {
      const int coeff_idx = r * tx1d_size + c;
      const int idx = r * size + c;
      const uint32_t mask_16 = ((1 << 16) - 1);
      const uint32_t tie_breaker = ~(((r + c) << COEFF_IDX_BITS) | coeff_idx);
      // prob[idx]: 16 bits  r+c: 6 bits  coeff_idx: 10 bits
      prob[idx] = (prob[idx] << 16) | (mask_16 & tie_breaker);
    }
  }
}

// topological sort
static void dfs_scan(int tx1d_size, int *scan_idx, int coeff_idx, int16_t *scan,
                     int16_t *iscan) {
  const int r = coeff_idx / tx1d_size;
  const int c = coeff_idx % tx1d_size;

  if (iscan[coeff_idx] != -1) return;

  if (r > 0) dfs_scan(tx1d_size, scan_idx, coeff_idx - tx1d_size, scan, iscan);

  if (c > 0) dfs_scan(tx1d_size, scan_idx, coeff_idx - 1, scan, iscan);

  scan[*scan_idx] = coeff_idx;
  iscan[coeff_idx] = *scan_idx;
  ++(*scan_idx);
}

void av1_update_neighbors(int tx_size, const int16_t *scan,
                          const int16_t *iscan, int16_t *neighbors) {
  const int tx1d_size = tx_size_wide[tx_size];
  const int tx2d_size = tx_size_2d[tx_size];
  int scan_idx;
  for (scan_idx = 0; scan_idx < tx2d_size; ++scan_idx) {
    const int coeff_idx = scan[scan_idx];
    const int r = coeff_idx / tx1d_size;
    const int c = coeff_idx % tx1d_size;
    const int has_left = c > 0 && iscan[coeff_idx - 1] < scan_idx;
    const int has_above = r > 0 && iscan[coeff_idx - tx1d_size] < scan_idx;

    if (has_left && has_above) {
      neighbors[scan_idx * MAX_NEIGHBORS + 0] = coeff_idx - 1;
      neighbors[scan_idx * MAX_NEIGHBORS + 1] = coeff_idx - tx1d_size;
    } else if (has_left) {
      neighbors[scan_idx * MAX_NEIGHBORS + 0] = coeff_idx - 1;
      neighbors[scan_idx * MAX_NEIGHBORS + 1] = coeff_idx - 1;
    } else if (has_above) {
      neighbors[scan_idx * MAX_NEIGHBORS + 0] = coeff_idx - tx1d_size;
      neighbors[scan_idx * MAX_NEIGHBORS + 1] = coeff_idx - tx1d_size;
    } else {
      neighbors[scan_idx * MAX_NEIGHBORS + 0] = scan[0];
      neighbors[scan_idx * MAX_NEIGHBORS + 1] = scan[0];
    }
  }
  neighbors[tx2d_size * MAX_NEIGHBORS + 0] = scan[0];
  neighbors[tx2d_size * MAX_NEIGHBORS + 1] = scan[0];
}

void av1_update_sort_order(TX_SIZE tx_size, const uint32_t *non_zero_prob,
                           int16_t *sort_order) {
  uint32_t temp[COEFF_IDX_SIZE];
  const int tx1d_size = tx_size_wide[tx_size];
  const int tx2d_size = tx_size_2d[tx_size];
  int sort_idx;
  assert(tx2d_size <= COEFF_IDX_SIZE);
  memcpy(temp, non_zero_prob, tx2d_size * sizeof(*non_zero_prob));
  av1_augment_prob(temp, tx1d_size, tx1d_size);
  qsort(temp, tx2d_size, sizeof(*temp), cmp_prob);
  for (sort_idx = 0; sort_idx < tx2d_size; ++sort_idx) {
    const int coeff_idx = (temp[sort_idx] & COEFF_IDX_MASK) ^ COEFF_IDX_MASK;
    sort_order[sort_idx] = coeff_idx;
  }
}

void av1_update_scan_order(TX_SIZE tx_size, int16_t *sort_order, int16_t *scan,
                           int16_t *iscan) {
  int coeff_idx;
  int scan_idx;
  int sort_idx;
  const int tx1d_size = tx_size_wide[tx_size];
  const int tx2d_size = tx_size_2d[tx_size];

  for (coeff_idx = 0; coeff_idx < tx2d_size; ++coeff_idx) {
    iscan[coeff_idx] = -1;
  }

  scan_idx = 0;
  for (sort_idx = 0; sort_idx < tx2d_size; ++sort_idx) {
    coeff_idx = sort_order[sort_idx];
    dfs_scan(tx1d_size, &scan_idx, coeff_idx, scan, iscan);
  }
}

void av1_update_scan_order_facade(AV1_COMMON *cm, TX_SIZE tx_size,
                                  TX_TYPE tx_type) {
  int16_t sort_order[1024];
  uint32_t *non_zero_prob = get_non_zero_prob(cm->fc, tx_size, tx_type);
  int16_t *scan = get_adapt_scan(cm->fc, tx_size, tx_type);
  int16_t *iscan = get_adapt_iscan(cm->fc, tx_size, tx_type);
  int16_t *nb = get_adapt_nb(cm->fc, tx_size, tx_type);
  assert(tx_size_2d[tx_size] <= 1024);
  av1_update_sort_order(tx_size, non_zero_prob, sort_order);
  av1_update_scan_order(tx_size, sort_order, scan, iscan);
  av1_update_neighbors(tx_size, scan, iscan, nb);
}

void av1_init_scan_order(AV1_COMMON *cm) {
  TX_SIZE tx_size;
  TX_TYPE tx_type;
  for (tx_size = TX_4X4; tx_size < TX_SIZES; ++tx_size) {
    for (tx_type = DCT_DCT; tx_type < TX_TYPES; ++tx_type) {
      uint32_t *non_zero_prob = get_non_zero_prob(cm->fc, tx_size, tx_type);
      const int tx2d_size = tx_size_2d[tx_size];
      int i;
      SCAN_ORDER *sc = &cm->fc->sc[tx_size][tx_type];
      for (i = 0; i < tx2d_size; ++i) {
        non_zero_prob[i] = (1 << 16) / 2;  // init non_zero_prob to 0.5
      }
      av1_update_scan_order_facade(cm, tx_size, tx_type);
      sc->scan = get_adapt_scan(cm->fc, tx_size, tx_type);
      sc->iscan = get_adapt_iscan(cm->fc, tx_size, tx_type);
      sc->neighbors = get_adapt_nb(cm->fc, tx_size, tx_type);
    }
  }
}

#endif  // CONFIG_ADAPT_SCAN