/*
 * Copyright (c) 2021, Alliance for Open Media. All rights reserved
 *
 * This source code is subject to the terms of the BSD 3-Clause Clear License
 * and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
 * License was not distributed with this source code in the LICENSE file, you
 * can obtain it at aomedia.org/license/software-license/bsd-3-c-c/.  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
 * aomedia.org/license/patent-license/.
 */

#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, 8, 5, 2, 12, 9, 6, 3, 13, 10, 7, 14, 11, 15,
};

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,
};

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

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,
};

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

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,
};

DECLARE_ALIGNED(16, static const int16_t, default_scan_4x16[64]) = {
  0,  4,  1,  8,  5,  2,  12, 9,  6,  3,  16, 13, 10, 7,  20, 17,
  14, 11, 24, 21, 18, 15, 28, 25, 22, 19, 32, 29, 26, 23, 36, 33,
  30, 27, 40, 37, 34, 31, 44, 41, 38, 35, 48, 45, 42, 39, 52, 49,
  46, 43, 56, 53, 50, 47, 60, 57, 54, 51, 61, 58, 55, 62, 59, 63,
};

DECLARE_ALIGNED(16, static const int16_t, default_scan_16x4[64]) = {
  0,  16, 1,  32, 17, 2,  48, 33, 18, 3,  49, 34, 19, 4,  50, 35,
  20, 5,  51, 36, 21, 6,  52, 37, 22, 7,  53, 38, 23, 8,  54, 39,
  24, 9,  55, 40, 25, 10, 56, 41, 26, 11, 57, 42, 27, 12, 58, 43,
  28, 13, 59, 44, 29, 14, 60, 45, 30, 15, 61, 46, 31, 62, 47, 63,
};

DECLARE_ALIGNED(16, static const int16_t, mrow_scan_4x16[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,
};

DECLARE_ALIGNED(16, static const int16_t, mrow_scan_16x4[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,
};

DECLARE_ALIGNED(16, static const int16_t, mcol_scan_4x16[64]) = {
  0, 4, 8,  12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60,
  1, 5, 9,  13, 17, 21, 25, 29, 33, 37, 41, 45, 49, 53, 57, 61,
  2, 6, 10, 14, 18, 22, 26, 30, 34, 38, 42, 46, 50, 54, 58, 62,
  3, 7, 11, 15, 19, 23, 27, 31, 35, 39, 43, 47, 51, 55, 59, 63,
};

DECLARE_ALIGNED(16, static const int16_t, mcol_scan_16x4[64]) = {
  0,  16, 32, 48, 1,  17, 33, 49, 2,  18, 34, 50, 3,  19, 35, 51,
  4,  20, 36, 52, 5,  21, 37, 53, 6,  22, 38, 54, 7,  23, 39, 55,
  8,  24, 40, 56, 9,  25, 41, 57, 10, 26, 42, 58, 11, 27, 43, 59,
  12, 28, 44, 60, 13, 29, 45, 61, 14, 30, 46, 62, 15, 31, 47, 63,
};

DECLARE_ALIGNED(16, static const int16_t, default_scan_4x32[128]) = {
  0,   4,   1,   8,   5,   2,   12,  9,   6,   3,   16,  13,  10,  7,   20,
  17,  14,  11,  24,  21,  18,  15,  28,  25,  22,  19,  32,  29,  26,  23,
  36,  33,  30,  27,  40,  37,  34,  31,  44,  41,  38,  35,  48,  45,  42,
  39,  52,  49,  46,  43,  56,  53,  50,  47,  60,  57,  54,  51,  64,  61,
  58,  55,  68,  65,  62,  59,  72,  69,  66,  63,  76,  73,  70,  67,  80,
  77,  74,  71,  84,  81,  78,  75,  88,  85,  82,  79,  92,  89,  86,  83,
  96,  93,  90,  87,  100, 97,  94,  91,  104, 101, 98,  95,  108, 105, 102,
  99,  112, 109, 106, 103, 116, 113, 110, 107, 120, 117, 114, 111, 124, 121,
  118, 115, 125, 122, 119, 126, 123, 127
};

DECLARE_ALIGNED(16, static const int16_t, default_scan_32x4[128]) = {
  0,  32, 1,   64, 33, 2,  96,  65, 34, 3,  97,  66, 35, 4,   98,  67,
  36, 5,  99,  68, 37, 6,  100, 69, 38, 7,  101, 70, 39, 8,   102, 71,
  40, 9,  103, 72, 41, 10, 104, 73, 42, 11, 105, 74, 43, 12,  106, 75,
  44, 13, 107, 76, 45, 14, 108, 77, 46, 15, 109, 78, 47, 16,  110, 79,
  48, 17, 111, 80, 49, 18, 112, 81, 50, 19, 113, 82, 51, 20,  114, 83,
  52, 21, 115, 84, 53, 22, 116, 85, 54, 23, 117, 86, 55, 24,  118, 87,
  56, 25, 119, 88, 57, 26, 120, 89, 58, 27, 121, 90, 59, 28,  122, 91,
  60, 29, 123, 92, 61, 30, 124, 93, 62, 31, 125, 94, 63, 126, 95,  127,
};

DECLARE_ALIGNED(16, static const int16_t, mrow_scan_4x32[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_32x4[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, mcol_scan_4x32[128]) = {
  0,  4,  8,  12, 16, 20, 24, 28, 32, 36,  40,  44,  48,  52,  56,  60,
  64, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 108, 112, 116, 120, 124,
  1,  5,  9,  13, 17, 21, 25, 29, 33, 37,  41,  45,  49,  53,  57,  61,
  65, 69, 73, 77, 81, 85, 89, 93, 97, 101, 105, 109, 113, 117, 121, 125,
  2,  6,  10, 14, 18, 22, 26, 30, 34, 38,  42,  46,  50,  54,  58,  62,
  66, 70, 74, 78, 82, 86, 90, 94, 98, 102, 106, 110, 114, 118, 122, 126,
  3,  7,  11, 15, 19, 23, 27, 31, 35, 39,  43,  47,  51,  55,  59,  63,
  67, 71, 75, 79, 83, 87, 91, 95, 99, 103, 107, 111, 115, 119, 123, 127,
};

DECLARE_ALIGNED(16, static const int16_t, mcol_scan_32x4[128]) = {
  0,  32, 64, 96,  1,  33, 65, 97,  2,  34, 66, 98,  3,  35, 67, 99,
  4,  36, 68, 100, 5,  37, 69, 101, 6,  38, 70, 102, 7,  39, 71, 103,
  8,  40, 72, 104, 9,  41, 73, 105, 10, 42, 74, 106, 11, 43, 75, 107,
  12, 44, 76, 108, 13, 45, 77, 109, 14, 46, 78, 110, 15, 47, 79, 111,
  16, 48, 80, 112, 17, 49, 81, 113, 18, 50, 82, 114, 19, 51, 83, 115,
  20, 52, 84, 116, 21, 53, 85, 117, 22, 54, 86, 118, 23, 55, 87, 119,
  24, 56, 88, 120, 25, 57, 89, 121, 26, 58, 90, 122, 27, 59, 91, 123,
  28, 60, 92, 124, 29, 61, 93, 125, 30, 62, 94, 126, 31, 63, 95, 127,
};

DECLARE_ALIGNED(16, static const int16_t, default_scan_8x32[256]) = {
  0,   8,   1,   16,  9,   2,   24,  17,  10,  3,   32,  25,  18,  11,  4,
  40,  33,  26,  19,  12,  5,   48,  41,  34,  27,  20,  13,  6,   56,  49,
  42,  35,  28,  21,  14,  7,   64,  57,  50,  43,  36,  29,  22,  15,  72,
  65,  58,  51,  44,  37,  30,  23,  80,  73,  66,  59,  52,  45,  38,  31,
  88,  81,  74,  67,  60,  53,  46,  39,  96,  89,  82,  75,  68,  61,  54,
  47,  104, 97,  90,  83,  76,  69,  62,  55,  112, 105, 98,  91,  84,  77,
  70,  63,  120, 113, 106, 99,  92,  85,  78,  71,  128, 121, 114, 107, 100,
  93,  86,  79,  136, 129, 122, 115, 108, 101, 94,  87,  144, 137, 130, 123,
  116, 109, 102, 95,  152, 145, 138, 131, 124, 117, 110, 103, 160, 153, 146,
  139, 132, 125, 118, 111, 168, 161, 154, 147, 140, 133, 126, 119, 176, 169,
  162, 155, 148, 141, 134, 127, 184, 177, 170, 163, 156, 149, 142, 135, 192,
  185, 178, 171, 164, 157, 150, 143, 200, 193, 186, 179, 172, 165, 158, 151,
  208, 201, 194, 187, 180, 173, 166, 159, 216, 209, 202, 195, 188, 181, 174,
  167, 224, 217, 210, 203, 196, 189, 182, 175, 232, 225, 218, 211, 204, 197,
  190, 183, 240, 233, 226, 219, 212, 205, 198, 191, 248, 241, 234, 227, 220,
  213, 206, 199, 249, 242, 235, 228, 221, 214, 207, 250, 243, 236, 229, 222,
  215, 251, 244, 237, 230, 223, 252, 245, 238, 231, 253, 246, 239, 254, 247,
  255,
};

DECLARE_ALIGNED(16, static const int16_t, default_scan_32x8[256]) = {
  0,   32,  1,   64,  33,  2,   96,  65,  34,  3,   128, 97,  66,  35,  4,
  160, 129, 98,  67,  36,  5,   192, 161, 130, 99,  68,  37,  6,   224, 193,
  162, 131, 100, 69,  38,  7,   225, 194, 163, 132, 101, 70,  39,  8,   226,
  195, 164, 133, 102, 71,  40,  9,   227, 196, 165, 134, 103, 72,  41,  10,
  228, 197, 166, 135, 104, 73,  42,  11,  229, 198, 167, 136, 105, 74,  43,
  12,  230, 199, 168, 137, 106, 75,  44,  13,  231, 200, 169, 138, 107, 76,
  45,  14,  232, 201, 170, 139, 108, 77,  46,  15,  233, 202, 171, 140, 109,
  78,  47,  16,  234, 203, 172, 141, 110, 79,  48,  17,  235, 204, 173, 142,
  111, 80,  49,  18,  236, 205, 174, 143, 112, 81,  50,  19,  237, 206, 175,
  144, 113, 82,  51,  20,  238, 207, 176, 145, 114, 83,  52,  21,  239, 208,
  177, 146, 115, 84,  53,  22,  240, 209, 178, 147, 116, 85,  54,  23,  241,
  210, 179, 148, 117, 86,  55,  24,  242, 211, 180, 149, 118, 87,  56,  25,
  243, 212, 181, 150, 119, 88,  57,  26,  244, 213, 182, 151, 120, 89,  58,
  27,  245, 214, 183, 152, 121, 90,  59,  28,  246, 215, 184, 153, 122, 91,
  60,  29,  247, 216, 185, 154, 123, 92,  61,  30,  248, 217, 186, 155, 124,
  93,  62,  31,  249, 218, 187, 156, 125, 94,  63,  250, 219, 188, 157, 126,
  95,  251, 220, 189, 158, 127, 252, 221, 190, 159, 253, 222, 191, 254, 223,
  255,
};

DECLARE_ALIGNED(16, static const int16_t, mrow_scan_8x32[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,
};

DECLARE_ALIGNED(16, static const int16_t, mrow_scan_32x8[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,
};

DECLARE_ALIGNED(16, static const int16_t, mcol_scan_8x32[256]) = {
  0,   8,   16,  24,  32,  40,  48,  56,  64,  72,  80,  88,  96,  104, 112,
  120, 128, 136, 144, 152, 160, 168, 176, 184, 192, 200, 208, 216, 224, 232,
  240, 248, 1,   9,   17,  25,  33,  41,  49,  57,  65,  73,  81,  89,  97,
  105, 113, 121, 129, 137, 145, 153, 161, 169, 177, 185, 193, 201, 209, 217,
  225, 233, 241, 249, 2,   10,  18,  26,  34,  42,  50,  58,  66,  74,  82,
  90,  98,  106, 114, 122, 130, 138, 146, 154, 162, 170, 178, 186, 194, 202,
  210, 218, 226, 234, 242, 250, 3,   11,  19,  27,  35,  43,  51,  59,  67,
  75,  83,  91,  99,  107, 115, 123, 131, 139, 147, 155, 163, 171, 179, 187,
  195, 203, 211, 219, 227, 235, 243, 251, 4,   12,  20,  28,  36,  44,  52,
  60,  68,  76,  84,  92,  100, 108, 116, 124, 132, 140, 148, 156, 164, 172,
  180, 188, 196, 204, 212, 220, 228, 236, 244, 252, 5,   13,  21,  29,  37,
  45,  53,  61,  69,  77,  85,  93,  101, 109, 117, 125, 133, 141, 149, 157,
  165, 173, 181, 189, 197, 205, 213, 221, 229, 237, 245, 253, 6,   14,  22,
  30,  38,  46,  54,  62,  70,  78,  86,  94,  102, 110, 118, 126, 134, 142,
  150, 158, 166, 174, 182, 190, 198, 206, 214, 222, 230, 238, 246, 254, 7,
  15,  23,  31,  39,  47,  55,  63,  71,  79,  87,  95,  103, 111, 119, 127,
  135, 143, 151, 159, 167, 175, 183, 191, 199, 207, 215, 223, 231, 239, 247,
  255,
};

DECLARE_ALIGNED(16, static const int16_t, mcol_scan_32x8[256]) = {
  0,  32, 64, 96,  128, 160, 192, 224, 1,  33, 65, 97,  129, 161, 193, 225,
  2,  34, 66, 98,  130, 162, 194, 226, 3,  35, 67, 99,  131, 163, 195, 227,
  4,  36, 68, 100, 132, 164, 196, 228, 5,  37, 69, 101, 133, 165, 197, 229,
  6,  38, 70, 102, 134, 166, 198, 230, 7,  39, 71, 103, 135, 167, 199, 231,
  8,  40, 72, 104, 136, 168, 200, 232, 9,  41, 73, 105, 137, 169, 201, 233,
  10, 42, 74, 106, 138, 170, 202, 234, 11, 43, 75, 107, 139, 171, 203, 235,
  12, 44, 76, 108, 140, 172, 204, 236, 13, 45, 77, 109, 141, 173, 205, 237,
  14, 46, 78, 110, 142, 174, 206, 238, 15, 47, 79, 111, 143, 175, 207, 239,
  16, 48, 80, 112, 144, 176, 208, 240, 17, 49, 81, 113, 145, 177, 209, 241,
  18, 50, 82, 114, 146, 178, 210, 242, 19, 51, 83, 115, 147, 179, 211, 243,
  20, 52, 84, 116, 148, 180, 212, 244, 21, 53, 85, 117, 149, 181, 213, 245,
  22, 54, 86, 118, 150, 182, 214, 246, 23, 55, 87, 119, 151, 183, 215, 247,
  24, 56, 88, 120, 152, 184, 216, 248, 25, 57, 89, 121, 153, 185, 217, 249,
  26, 58, 90, 122, 154, 186, 218, 250, 27, 59, 91, 123, 155, 187, 219, 251,
  28, 60, 92, 124, 156, 188, 220, 252, 29, 61, 93, 125, 157, 189, 221, 253,
  30, 62, 94, 126, 158, 190, 222, 254, 31, 63, 95, 127, 159, 191, 223, 255,
};

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

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,
};

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

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

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,
};

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

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

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,
};

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

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,
};

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,
};

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

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

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,
};

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

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,
};

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

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,
};

DECLARE_ALIGNED(16, static const int16_t, av1_default_iscan_4x16[64]) = {
  0,  2,  5,  9,  1,  4,  8,  13, 3,  7,  12, 17, 6,  11, 16, 21,
  10, 15, 20, 25, 14, 19, 24, 29, 18, 23, 28, 33, 22, 27, 32, 37,
  26, 31, 36, 41, 30, 35, 40, 45, 34, 39, 44, 49, 38, 43, 48, 53,
  42, 47, 52, 57, 46, 51, 56, 60, 50, 55, 59, 62, 54, 58, 61, 63
};

DECLARE_ALIGNED(16, static const int16_t, av1_default_iscan_16x4[64]) = {
  0, 2,  5,  9,  13, 17, 21, 25, 29, 33, 37, 41, 45, 49, 53, 57,
  1, 4,  8,  12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60,
  3, 7,  11, 15, 19, 23, 27, 31, 35, 39, 43, 47, 51, 55, 59, 62,
  6, 10, 14, 18, 22, 26, 30, 34, 38, 42, 46, 50, 54, 58, 61, 63,
};

DECLARE_ALIGNED(16, static const int16_t, av1_mrow_iscan_4x16[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,
};

DECLARE_ALIGNED(16, static const int16_t, av1_mrow_iscan_16x4[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,
};

DECLARE_ALIGNED(16, static const int16_t, av1_mcol_iscan_4x16[64]) = {
  0,  16, 32, 48, 1,  17, 33, 49, 2,  18, 34, 50, 3,  19, 35, 51,
  4,  20, 36, 52, 5,  21, 37, 53, 6,  22, 38, 54, 7,  23, 39, 55,
  8,  24, 40, 56, 9,  25, 41, 57, 10, 26, 42, 58, 11, 27, 43, 59,
  12, 28, 44, 60, 13, 29, 45, 61, 14, 30, 46, 62, 15, 31, 47, 63,
};

DECLARE_ALIGNED(16, static const int16_t, av1_mcol_iscan_16x4[64]) = {
  0, 4, 8,  12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60,
  1, 5, 9,  13, 17, 21, 25, 29, 33, 37, 41, 45, 49, 53, 57, 61,
  2, 6, 10, 14, 18, 22, 26, 30, 34, 38, 42, 46, 50, 54, 58, 62,
  3, 7, 11, 15, 19, 23, 27, 31, 35, 39, 43, 47, 51, 55, 59, 63,
};

DECLARE_ALIGNED(16, static const int16_t, av1_default_iscan_4x32[128]) = {
  0,   2,   5,   9,   1,   4,   8,   13,  3,   7,   12,  17,  6,   11,  16,
  21,  10,  15,  20,  25,  14,  19,  24,  29,  18,  23,  28,  33,  22,  27,
  32,  37,  26,  31,  36,  41,  30,  35,  40,  45,  34,  39,  44,  49,  38,
  43,  48,  53,  42,  47,  52,  57,  46,  51,  56,  61,  50,  55,  60,  65,
  54,  59,  64,  69,  58,  63,  68,  73,  62,  67,  72,  77,  66,  71,  76,
  81,  70,  75,  80,  85,  74,  79,  84,  89,  78,  83,  88,  93,  82,  87,
  92,  97,  86,  91,  96,  101, 90,  95,  100, 105, 94,  99,  104, 109, 98,
  103, 108, 113, 102, 107, 112, 117, 106, 111, 116, 121, 110, 115, 120, 124,
  114, 119, 123, 126, 118, 122, 125, 127
};

DECLARE_ALIGNED(16, static const int16_t, av1_default_iscan_32x4[128]) = {
  0,  2,  5,  9,  13, 17, 21, 25, 29,  33,  37,  41,  45,  49,  53,  57,
  61, 65, 69, 73, 77, 81, 85, 89, 93,  97,  101, 105, 109, 113, 117, 121,
  1,  4,  8,  12, 16, 20, 24, 28, 32,  36,  40,  44,  48,  52,  56,  60,
  64, 68, 72, 76, 80, 84, 88, 92, 96,  100, 104, 108, 112, 116, 120, 124,
  3,  7,  11, 15, 19, 23, 27, 31, 35,  39,  43,  47,  51,  55,  59,  63,
  67, 71, 75, 79, 83, 87, 91, 95, 99,  103, 107, 111, 115, 119, 123, 126,
  6,  10, 14, 18, 22, 26, 30, 34, 38,  42,  46,  50,  54,  58,  62,  66,
  70, 74, 78, 82, 86, 90, 94, 98, 102, 106, 110, 114, 118, 122, 125, 127,
};

DECLARE_ALIGNED(16, static const int16_t, av1_mrow_iscan_4x32[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_32x4[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_mcol_iscan_4x32[128]) = {
  0,  32, 64, 96,  1,  33, 65, 97,  2,  34, 66, 98,  3,  35, 67, 99,
  4,  36, 68, 100, 5,  37, 69, 101, 6,  38, 70, 102, 7,  39, 71, 103,
  8,  40, 72, 104, 9,  41, 73, 105, 10, 42, 74, 106, 11, 43, 75, 107,
  12, 44, 76, 108, 13, 45, 77, 109, 14, 46, 78, 110, 15, 47, 79, 111,
  16, 48, 80, 112, 17, 49, 81, 113, 18, 50, 82, 114, 19, 51, 83, 115,
  20, 52, 84, 116, 21, 53, 85, 117, 22, 54, 86, 118, 23, 55, 87, 119,
  24, 56, 88, 120, 25, 57, 89, 121, 26, 58, 90, 122, 27, 59, 91, 123,
  28, 60, 92, 124, 29, 61, 93, 125, 30, 62, 94, 126, 31, 63, 95, 127,
};

DECLARE_ALIGNED(16, static const int16_t, av1_mcol_iscan_32x4[128]) = {
  0,  4,  8,  12, 16, 20, 24, 28, 32, 36,  40,  44,  48,  52,  56,  60,
  64, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 108, 112, 116, 120, 124,
  1,  5,  9,  13, 17, 21, 25, 29, 33, 37,  41,  45,  49,  53,  57,  61,
  65, 69, 73, 77, 81, 85, 89, 93, 97, 101, 105, 109, 113, 117, 121, 125,
  2,  6,  10, 14, 18, 22, 26, 30, 34, 38,  42,  46,  50,  54,  58,  62,
  66, 70, 74, 78, 82, 86, 90, 94, 98, 102, 106, 110, 114, 118, 122, 126,
  3,  7,  11, 15, 19, 23, 27, 31, 35, 39,  43,  47,  51,  55,  59,  63,
  67, 71, 75, 79, 83, 87, 91, 95, 99, 103, 107, 111, 115, 119, 123, 127,
};

DECLARE_ALIGNED(16, static const int16_t, av1_default_iscan_8x32[256]) = {
  0,   2,   5,   9,   14,  20,  27,  35,  1,   4,   8,   13,  19,  26,  34,
  43,  3,   7,   12,  18,  25,  33,  42,  51,  6,   11,  17,  24,  32,  41,
  50,  59,  10,  16,  23,  31,  40,  49,  58,  67,  15,  22,  30,  39,  48,
  57,  66,  75,  21,  29,  38,  47,  56,  65,  74,  83,  28,  37,  46,  55,
  64,  73,  82,  91,  36,  45,  54,  63,  72,  81,  90,  99,  44,  53,  62,
  71,  80,  89,  98,  107, 52,  61,  70,  79,  88,  97,  106, 115, 60,  69,
  78,  87,  96,  105, 114, 123, 68,  77,  86,  95,  104, 113, 122, 131, 76,
  85,  94,  103, 112, 121, 130, 139, 84,  93,  102, 111, 120, 129, 138, 147,
  92,  101, 110, 119, 128, 137, 146, 155, 100, 109, 118, 127, 136, 145, 154,
  163, 108, 117, 126, 135, 144, 153, 162, 171, 116, 125, 134, 143, 152, 161,
  170, 179, 124, 133, 142, 151, 160, 169, 178, 187, 132, 141, 150, 159, 168,
  177, 186, 195, 140, 149, 158, 167, 176, 185, 194, 203, 148, 157, 166, 175,
  184, 193, 202, 211, 156, 165, 174, 183, 192, 201, 210, 219, 164, 173, 182,
  191, 200, 209, 218, 227, 172, 181, 190, 199, 208, 217, 226, 234, 180, 189,
  198, 207, 216, 225, 233, 240, 188, 197, 206, 215, 224, 232, 239, 245, 196,
  205, 214, 223, 231, 238, 244, 249, 204, 213, 222, 230, 237, 243, 248, 252,
  212, 221, 229, 236, 242, 247, 251, 254, 220, 228, 235, 241, 246, 250, 253,
  255,
};

DECLARE_ALIGNED(16, static const int16_t, av1_default_iscan_32x8[256]) = {
  0,   2,   5,   9,   14,  20,  27,  35,  43,  51,  59,  67,  75,  83,  91,
  99,  107, 115, 123, 131, 139, 147, 155, 163, 171, 179, 187, 195, 203, 211,
  219, 227, 1,   4,   8,   13,  19,  26,  34,  42,  50,  58,  66,  74,  82,
  90,  98,  106, 114, 122, 130, 138, 146, 154, 162, 170, 178, 186, 194, 202,
  210, 218, 226, 234, 3,   7,   12,  18,  25,  33,  41,  49,  57,  65,  73,
  81,  89,  97,  105, 113, 121, 129, 137, 145, 153, 161, 169, 177, 185, 193,
  201, 209, 217, 225, 233, 240, 6,   11,  17,  24,  32,  40,  48,  56,  64,
  72,  80,  88,  96,  104, 112, 120, 128, 136, 144, 152, 160, 168, 176, 184,
  192, 200, 208, 216, 224, 232, 239, 245, 10,  16,  23,  31,  39,  47,  55,
  63,  71,  79,  87,  95,  103, 111, 119, 127, 135, 143, 151, 159, 167, 175,
  183, 191, 199, 207, 215, 223, 231, 238, 244, 249, 15,  22,  30,  38,  46,
  54,  62,  70,  78,  86,  94,  102, 110, 118, 126, 134, 142, 150, 158, 166,
  174, 182, 190, 198, 206, 214, 222, 230, 237, 243, 248, 252, 21,  29,  37,
  45,  53,  61,  69,  77,  85,  93,  101, 109, 117, 125, 133, 141, 149, 157,
  165, 173, 181, 189, 197, 205, 213, 221, 229, 236, 242, 247, 251, 254, 28,
  36,  44,  52,  60,  68,  76,  84,  92,  100, 108, 116, 124, 132, 140, 148,
  156, 164, 172, 180, 188, 196, 204, 212, 220, 228, 235, 241, 246, 250, 253,
  255,
};

DECLARE_ALIGNED(16, static const int16_t, av1_mrow_iscan_8x32[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,
};

DECLARE_ALIGNED(16, static const int16_t, av1_mrow_iscan_32x8[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,
};

DECLARE_ALIGNED(16, static const int16_t, av1_mcol_iscan_8x32[256]) = {
  0,  32, 64, 96,  128, 160, 192, 224, 1,  33, 65, 97,  129, 161, 193, 225,
  2,  34, 66, 98,  130, 162, 194, 226, 3,  35, 67, 99,  131, 163, 195, 227,
  4,  36, 68, 100, 132, 164, 196, 228, 5,  37, 69, 101, 133, 165, 197, 229,
  6,  38, 70, 102, 134, 166, 198, 230, 7,  39, 71, 103, 135, 167, 199, 231,
  8,  40, 72, 104, 136, 168, 200, 232, 9,  41, 73, 105, 137, 169, 201, 233,
  10, 42, 74, 106, 138, 170, 202, 234, 11, 43, 75, 107, 139, 171, 203, 235,
  12, 44, 76, 108, 140, 172, 204, 236, 13, 45, 77, 109, 141, 173, 205, 237,
  14, 46, 78, 110, 142, 174, 206, 238, 15, 47, 79, 111, 143, 175, 207, 239,
  16, 48, 80, 112, 144, 176, 208, 240, 17, 49, 81, 113, 145, 177, 209, 241,
  18, 50, 82, 114, 146, 178, 210, 242, 19, 51, 83, 115, 147, 179, 211, 243,
  20, 52, 84, 116, 148, 180, 212, 244, 21, 53, 85, 117, 149, 181, 213, 245,
  22, 54, 86, 118, 150, 182, 214, 246, 23, 55, 87, 119, 151, 183, 215, 247,
  24, 56, 88, 120, 152, 184, 216, 248, 25, 57, 89, 121, 153, 185, 217, 249,
  26, 58, 90, 122, 154, 186, 218, 250, 27, 59, 91, 123, 155, 187, 219, 251,
  28, 60, 92, 124, 156, 188, 220, 252, 29, 61, 93, 125, 157, 189, 221, 253,
  30, 62, 94, 126, 158, 190, 222, 254, 31, 63, 95, 127, 159, 191, 223, 255,
};

DECLARE_ALIGNED(16, static const int16_t, av1_mcol_iscan_32x8[256]) = {
  0,   8,   16,  24,  32,  40,  48,  56,  64,  72,  80,  88,  96,  104, 112,
  120, 128, 136, 144, 152, 160, 168, 176, 184, 192, 200, 208, 216, 224, 232,
  240, 248, 1,   9,   17,  25,  33,  41,  49,  57,  65,  73,  81,  89,  97,
  105, 113, 121, 129, 137, 145, 153, 161, 169, 177, 185, 193, 201, 209, 217,
  225, 233, 241, 249, 2,   10,  18,  26,  34,  42,  50,  58,  66,  74,  82,
  90,  98,  106, 114, 122, 130, 138, 146, 154, 162, 170, 178, 186, 194, 202,
  210, 218, 226, 234, 242, 250, 3,   11,  19,  27,  35,  43,  51,  59,  67,
  75,  83,  91,  99,  107, 115, 123, 131, 139, 147, 155, 163, 171, 179, 187,
  195, 203, 211, 219, 227, 235, 243, 251, 4,   12,  20,  28,  36,  44,  52,
  60,  68,  76,  84,  92,  100, 108, 116, 124, 132, 140, 148, 156, 164, 172,
  180, 188, 196, 204, 212, 220, 228, 236, 244, 252, 5,   13,  21,  29,  37,
  45,  53,  61,  69,  77,  85,  93,  101, 109, 117, 125, 133, 141, 149, 157,
  165, 173, 181, 189, 197, 205, 213, 221, 229, 237, 245, 253, 6,   14,  22,
  30,  38,  46,  54,  62,  70,  78,  86,  94,  102, 110, 118, 126, 134, 142,
  150, 158, 166, 174, 182, 190, 198, 206, 214, 222, 230, 238, 246, 254, 7,
  15,  23,  31,  39,  47,  55,  63,  71,  79,  87,  95,  103, 111, 119, 127,
  135, 143, 151, 159, 167, 175, 183, 191, 199, 207, 215, 223, 231, 239, 247,
  255,
};

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,
};

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

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

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

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,
};

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

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

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,
};

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,
};

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

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,
};

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

const SCAN_ORDER av1_default_scan_orders[TX_SIZES] = {
  { default_scan_4x4, av1_default_iscan_4x4 },
  { default_scan_8x8, av1_default_iscan_8x8 },
  { default_scan_16x16, av1_default_iscan_16x16 },
  { default_scan_32x32, av1_default_iscan_32x32 },
  // Half of the coefficients of tx64 at higher frequencies are set to
  // zeros. So tx32's scan order is used.
  { default_scan_32x32, av1_default_iscan_32x32 },
};

const SCAN_ORDER av1_scan_orders[TX_SIZES_ALL][TX_TYPES] = {
  {
      // TX_4X4
      { default_scan_4x4, av1_default_iscan_4x4 },
      { default_scan_4x4, av1_default_iscan_4x4 },
      { default_scan_4x4, av1_default_iscan_4x4 },
      { default_scan_4x4, av1_default_iscan_4x4 },
      { default_scan_4x4, av1_default_iscan_4x4 },
      { default_scan_4x4, av1_default_iscan_4x4 },
      { default_scan_4x4, av1_default_iscan_4x4 },
      { default_scan_4x4, av1_default_iscan_4x4 },
      { default_scan_4x4, av1_default_iscan_4x4 },
      { default_scan_4x4, av1_default_iscan_4x4 },
      { mrow_scan_4x4, av1_mrow_iscan_4x4 },
      { mcol_scan_4x4, av1_mcol_iscan_4x4 },
      { mrow_scan_4x4, av1_mrow_iscan_4x4 },
      { mcol_scan_4x4, av1_mcol_iscan_4x4 },
      { mrow_scan_4x4, av1_mrow_iscan_4x4 },
      { mcol_scan_4x4, av1_mcol_iscan_4x4 },
  },
  {
      // TX_8X8
      { default_scan_8x8, av1_default_iscan_8x8 },
      { default_scan_8x8, av1_default_iscan_8x8 },
      { default_scan_8x8, av1_default_iscan_8x8 },
      { default_scan_8x8, av1_default_iscan_8x8 },
      { default_scan_8x8, av1_default_iscan_8x8 },
      { default_scan_8x8, av1_default_iscan_8x8 },
      { default_scan_8x8, av1_default_iscan_8x8 },
      { default_scan_8x8, av1_default_iscan_8x8 },
      { default_scan_8x8, av1_default_iscan_8x8 },
      { default_scan_8x8, av1_default_iscan_8x8 },
      { mrow_scan_8x8, av1_mrow_iscan_8x8 },
      { mcol_scan_8x8, av1_mcol_iscan_8x8 },
      { mrow_scan_8x8, av1_mrow_iscan_8x8 },
      { mcol_scan_8x8, av1_mcol_iscan_8x8 },
      { mrow_scan_8x8, av1_mrow_iscan_8x8 },
      { mcol_scan_8x8, av1_mcol_iscan_8x8 },
  },
  {
      // TX_16X16
      { default_scan_16x16, av1_default_iscan_16x16 },
      { default_scan_16x16, av1_default_iscan_16x16 },
      { default_scan_16x16, av1_default_iscan_16x16 },
      { default_scan_16x16, av1_default_iscan_16x16 },
      { default_scan_16x16, av1_default_iscan_16x16 },
      { default_scan_16x16, av1_default_iscan_16x16 },
      { default_scan_16x16, av1_default_iscan_16x16 },
      { default_scan_16x16, av1_default_iscan_16x16 },
      { default_scan_16x16, av1_default_iscan_16x16 },
      { default_scan_16x16, av1_default_iscan_16x16 },
      { mrow_scan_16x16, av1_mrow_iscan_16x16 },
      { mcol_scan_16x16, av1_mcol_iscan_16x16 },
      { mrow_scan_16x16, av1_mrow_iscan_16x16 },
      { mcol_scan_16x16, av1_mcol_iscan_16x16 },
      { mrow_scan_16x16, av1_mrow_iscan_16x16 },
      { mcol_scan_16x16, av1_mcol_iscan_16x16 },
  },
  {
      // TX_32X32
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { mrow_scan_32x32, av1_mrow_iscan_32x32 },
      { mcol_scan_32x32, av1_mcol_iscan_32x32 },
      { mrow_scan_32x32, av1_mrow_iscan_32x32 },
      { mcol_scan_32x32, av1_mcol_iscan_32x32 },
      { mrow_scan_32x32, av1_mrow_iscan_32x32 },
      { mcol_scan_32x32, av1_mcol_iscan_32x32 },
  },
  {
      // TX_64X64
      // Half of the coefficients of tx64 at higher frequencies are set to
      // zeros. So tx32's scan order is used.
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { mrow_scan_32x32, av1_mrow_iscan_32x32 },
      { mcol_scan_32x32, av1_mcol_iscan_32x32 },
      { mrow_scan_32x32, av1_mrow_iscan_32x32 },
      { mcol_scan_32x32, av1_mcol_iscan_32x32 },
      { mrow_scan_32x32, av1_mrow_iscan_32x32 },
      { mcol_scan_32x32, av1_mcol_iscan_32x32 },
  },
  {
      // TX_4X8
      { default_scan_4x8, av1_default_iscan_4x8 },
      { default_scan_4x8, av1_default_iscan_4x8 },
      { default_scan_4x8, av1_default_iscan_4x8 },
      { default_scan_4x8, av1_default_iscan_4x8 },
      { default_scan_4x8, av1_default_iscan_4x8 },
      { default_scan_4x8, av1_default_iscan_4x8 },
      { default_scan_4x8, av1_default_iscan_4x8 },
      { default_scan_4x8, av1_default_iscan_4x8 },
      { default_scan_4x8, av1_default_iscan_4x8 },
      { default_scan_4x8, av1_default_iscan_4x8 },
      { mrow_scan_4x8, av1_mrow_iscan_4x8 },
      { mcol_scan_4x8, av1_mcol_iscan_4x8 },
      { mrow_scan_4x8, av1_mrow_iscan_4x8 },
      { mcol_scan_4x8, av1_mcol_iscan_4x8 },
      { mrow_scan_4x8, av1_mrow_iscan_4x8 },
      { mcol_scan_4x8, av1_mcol_iscan_4x8 },
  },
  {
      // TX_8X4
      { default_scan_8x4, av1_default_iscan_8x4 },
      { default_scan_8x4, av1_default_iscan_8x4 },
      { default_scan_8x4, av1_default_iscan_8x4 },
      { default_scan_8x4, av1_default_iscan_8x4 },
      { default_scan_8x4, av1_default_iscan_8x4 },
      { default_scan_8x4, av1_default_iscan_8x4 },
      { default_scan_8x4, av1_default_iscan_8x4 },
      { default_scan_8x4, av1_default_iscan_8x4 },
      { default_scan_8x4, av1_default_iscan_8x4 },
      { default_scan_8x4, av1_default_iscan_8x4 },
      { mrow_scan_8x4, av1_mrow_iscan_8x4 },
      { mcol_scan_8x4, av1_mcol_iscan_8x4 },
      { mrow_scan_8x4, av1_mrow_iscan_8x4 },
      { mcol_scan_8x4, av1_mcol_iscan_8x4 },
      { mrow_scan_8x4, av1_mrow_iscan_8x4 },
      { mcol_scan_8x4, av1_mcol_iscan_8x4 },
  },
  {
      // TX_8X16
      { default_scan_8x16, av1_default_iscan_8x16 },
      { default_scan_8x16, av1_default_iscan_8x16 },
      { default_scan_8x16, av1_default_iscan_8x16 },
      { default_scan_8x16, av1_default_iscan_8x16 },
      { default_scan_8x16, av1_default_iscan_8x16 },
      { default_scan_8x16, av1_default_iscan_8x16 },
      { default_scan_8x16, av1_default_iscan_8x16 },
      { default_scan_8x16, av1_default_iscan_8x16 },
      { default_scan_8x16, av1_default_iscan_8x16 },
      { default_scan_8x16, av1_default_iscan_8x16 },
      { mrow_scan_8x16, av1_mrow_iscan_8x16 },
      { mcol_scan_8x16, av1_mcol_iscan_8x16 },
      { mrow_scan_8x16, av1_mrow_iscan_8x16 },
      { mcol_scan_8x16, av1_mcol_iscan_8x16 },
      { mrow_scan_8x16, av1_mrow_iscan_8x16 },
      { mcol_scan_8x16, av1_mcol_iscan_8x16 },
  },
  {
      // TX_16X8
      { default_scan_16x8, av1_default_iscan_16x8 },
      { default_scan_16x8, av1_default_iscan_16x8 },
      { default_scan_16x8, av1_default_iscan_16x8 },
      { default_scan_16x8, av1_default_iscan_16x8 },
      { default_scan_16x8, av1_default_iscan_16x8 },
      { default_scan_16x8, av1_default_iscan_16x8 },
      { default_scan_16x8, av1_default_iscan_16x8 },
      { default_scan_16x8, av1_default_iscan_16x8 },
      { default_scan_16x8, av1_default_iscan_16x8 },
      { default_scan_16x8, av1_default_iscan_16x8 },
      { mrow_scan_16x8, av1_mrow_iscan_16x8 },
      { mcol_scan_16x8, av1_mcol_iscan_16x8 },
      { mrow_scan_16x8, av1_mrow_iscan_16x8 },
      { mcol_scan_16x8, av1_mcol_iscan_16x8 },
      { mrow_scan_16x8, av1_mrow_iscan_16x8 },
      { mcol_scan_16x8, av1_mcol_iscan_16x8 },
  },
  {
      // TX_16X32
      { default_scan_16x32, av1_default_iscan_16x32 },
      { default_scan_16x32, av1_default_iscan_16x32 },
      { default_scan_16x32, av1_default_iscan_16x32 },
      { default_scan_16x32, av1_default_iscan_16x32 },
      { default_scan_16x32, av1_default_iscan_16x32 },
      { default_scan_16x32, av1_default_iscan_16x32 },
      { default_scan_16x32, av1_default_iscan_16x32 },
      { default_scan_16x32, av1_default_iscan_16x32 },
      { default_scan_16x32, av1_default_iscan_16x32 },
      { default_scan_16x32, av1_default_iscan_16x32 },
      { mrow_scan_16x32, av1_mrow_iscan_16x32 },
      { mcol_scan_16x32, av1_mcol_iscan_16x32 },
      { mrow_scan_16x32, av1_mrow_iscan_16x32 },
      { mcol_scan_16x32, av1_mcol_iscan_16x32 },
      { mrow_scan_16x32, av1_mrow_iscan_16x32 },
      { mcol_scan_16x32, av1_mcol_iscan_16x32 },
  },
  {
      // TX_32X16
      { default_scan_32x16, av1_default_iscan_32x16 },
      { default_scan_32x16, av1_default_iscan_32x16 },
      { default_scan_32x16, av1_default_iscan_32x16 },
      { default_scan_32x16, av1_default_iscan_32x16 },
      { default_scan_32x16, av1_default_iscan_32x16 },
      { default_scan_32x16, av1_default_iscan_32x16 },
      { default_scan_32x16, av1_default_iscan_32x16 },
      { default_scan_32x16, av1_default_iscan_32x16 },
      { default_scan_32x16, av1_default_iscan_32x16 },
      { default_scan_32x16, av1_default_iscan_32x16 },
      { mrow_scan_32x16, av1_mrow_iscan_32x16 },
      { mcol_scan_32x16, av1_mcol_iscan_32x16 },
      { mrow_scan_32x16, av1_mrow_iscan_32x16 },
      { mcol_scan_32x16, av1_mcol_iscan_32x16 },
      { mrow_scan_32x16, av1_mrow_iscan_32x16 },
      { mcol_scan_32x16, av1_mcol_iscan_32x16 },
  },
  {
      // TX_32X64
      // Half of the coefficients of tx64 at higher frequencies are set to
      // zeros. So tx32's scan order is used.
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { mrow_scan_32x32, av1_mrow_iscan_32x32 },
      { mcol_scan_32x32, av1_mcol_iscan_32x32 },
      { mrow_scan_32x32, av1_mrow_iscan_32x32 },
      { mcol_scan_32x32, av1_mcol_iscan_32x32 },
      { mrow_scan_32x32, av1_mrow_iscan_32x32 },
      { mcol_scan_32x32, av1_mcol_iscan_32x32 },
  },
  {
      // TX_64X32
      // Half of the coefficients of tx64 at higher frequencies are set to
      // zeros. So tx32's scan order is used.
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { default_scan_32x32, av1_default_iscan_32x32 },
      { mrow_scan_32x32, av1_mrow_iscan_32x32 },
      { mcol_scan_32x32, av1_mcol_iscan_32x32 },
      { mrow_scan_32x32, av1_mrow_iscan_32x32 },
      { mcol_scan_32x32, av1_mcol_iscan_32x32 },
      { mrow_scan_32x32, av1_mrow_iscan_32x32 },
      { mcol_scan_32x32, av1_mcol_iscan_32x32 },
  },
  {
      // TX_4X16
      { default_scan_4x16, av1_default_iscan_4x16 },
      { default_scan_4x16, av1_default_iscan_4x16 },
      { default_scan_4x16, av1_default_iscan_4x16 },
      { default_scan_4x16, av1_default_iscan_4x16 },
      { default_scan_4x16, av1_default_iscan_4x16 },
      { default_scan_4x16, av1_default_iscan_4x16 },
      { default_scan_4x16, av1_default_iscan_4x16 },
      { default_scan_4x16, av1_default_iscan_4x16 },
      { default_scan_4x16, av1_default_iscan_4x16 },
      { default_scan_4x16, av1_default_iscan_4x16 },
      { mrow_scan_4x16, av1_mrow_iscan_4x16 },
      { mcol_scan_4x16, av1_mcol_iscan_4x16 },
      { mrow_scan_4x16, av1_mrow_iscan_4x16 },
      { mcol_scan_4x16, av1_mcol_iscan_4x16 },
      { mrow_scan_4x16, av1_mrow_iscan_4x16 },
      { mcol_scan_4x16, av1_mcol_iscan_4x16 },
  },
  {
      // TX_16X4
      { default_scan_16x4, av1_default_iscan_16x4 },
      { default_scan_16x4, av1_default_iscan_16x4 },
      { default_scan_16x4, av1_default_iscan_16x4 },
      { default_scan_16x4, av1_default_iscan_16x4 },
      { default_scan_16x4, av1_default_iscan_16x4 },
      { default_scan_16x4, av1_default_iscan_16x4 },
      { default_scan_16x4, av1_default_iscan_16x4 },
      { default_scan_16x4, av1_default_iscan_16x4 },
      { default_scan_16x4, av1_default_iscan_16x4 },
      { default_scan_16x4, av1_default_iscan_16x4 },
      { mrow_scan_16x4, av1_mrow_iscan_16x4 },
      { mcol_scan_16x4, av1_mcol_iscan_16x4 },
      { mrow_scan_16x4, av1_mrow_iscan_16x4 },
      { mcol_scan_16x4, av1_mcol_iscan_16x4 },
      { mrow_scan_16x4, av1_mrow_iscan_16x4 },
      { mcol_scan_16x4, av1_mcol_iscan_16x4 },
  },
  {
      // TX_8X32
      { default_scan_8x32, av1_default_iscan_8x32 },
      { default_scan_8x32, av1_default_iscan_8x32 },
      { default_scan_8x32, av1_default_iscan_8x32 },
      { default_scan_8x32, av1_default_iscan_8x32 },
      { default_scan_8x32, av1_default_iscan_8x32 },
      { default_scan_8x32, av1_default_iscan_8x32 },
      { default_scan_8x32, av1_default_iscan_8x32 },
      { default_scan_8x32, av1_default_iscan_8x32 },
      { default_scan_8x32, av1_default_iscan_8x32 },
      { default_scan_8x32, av1_default_iscan_8x32 },
      { mrow_scan_8x32, av1_mrow_iscan_8x32 },
      { mcol_scan_8x32, av1_mcol_iscan_8x32 },
      { mrow_scan_8x32, av1_mrow_iscan_8x32 },
      { mcol_scan_8x32, av1_mcol_iscan_8x32 },
      { mrow_scan_8x32, av1_mrow_iscan_8x32 },
      { mcol_scan_8x32, av1_mcol_iscan_8x32 },
  },
  {
      // TX_32X8
      { default_scan_32x8, av1_default_iscan_32x8 },
      { default_scan_32x8, av1_default_iscan_32x8 },
      { default_scan_32x8, av1_default_iscan_32x8 },
      { default_scan_32x8, av1_default_iscan_32x8 },
      { default_scan_32x8, av1_default_iscan_32x8 },
      { default_scan_32x8, av1_default_iscan_32x8 },
      { default_scan_32x8, av1_default_iscan_32x8 },
      { default_scan_32x8, av1_default_iscan_32x8 },
      { default_scan_32x8, av1_default_iscan_32x8 },
      { default_scan_32x8, av1_default_iscan_32x8 },
      { mrow_scan_32x8, av1_mrow_iscan_32x8 },
      { mcol_scan_32x8, av1_mcol_iscan_32x8 },
      { mrow_scan_32x8, av1_mrow_iscan_32x8 },
      { mcol_scan_32x8, av1_mcol_iscan_32x8 },
      { mrow_scan_32x8, av1_mrow_iscan_32x8 },
      { mcol_scan_32x8, av1_mcol_iscan_32x8 },
  },
  {
      // TX_16X64
      // Half of the coefficients of tx64 at higher frequencies are set to
      // zeros. So tx32's scan order is used.
      { default_scan_16x32, av1_default_iscan_16x32 },
      { default_scan_16x32, av1_default_iscan_16x32 },
      { default_scan_16x32, av1_default_iscan_16x32 },
      { default_scan_16x32, av1_default_iscan_16x32 },
      { default_scan_16x32, av1_default_iscan_16x32 },
      { default_scan_16x32, av1_default_iscan_16x32 },
      { default_scan_16x32, av1_default_iscan_16x32 },
      { default_scan_16x32, av1_default_iscan_16x32 },
      { default_scan_16x32, av1_default_iscan_16x32 },
      { default_scan_16x32, av1_default_iscan_16x32 },
      { mrow_scan_16x32, av1_mrow_iscan_16x32 },
      { mcol_scan_16x32, av1_mcol_iscan_16x32 },
      { mrow_scan_16x32, av1_mrow_iscan_16x32 },
      { mcol_scan_16x32, av1_mcol_iscan_16x32 },
      { mrow_scan_16x32, av1_mrow_iscan_16x32 },
      { mcol_scan_16x32, av1_mcol_iscan_16x32 },
  },
  {
      // TX_64X16
      // Half of the coefficients of tx64 at higher frequencies are set to
      // zeros. So tx32's scan order is used.
      { default_scan_32x16, av1_default_iscan_32x16 },
      { default_scan_32x16, av1_default_iscan_32x16 },
      { default_scan_32x16, av1_default_iscan_32x16 },
      { default_scan_32x16, av1_default_iscan_32x16 },
      { default_scan_32x16, av1_default_iscan_32x16 },
      { default_scan_32x16, av1_default_iscan_32x16 },
      { default_scan_32x16, av1_default_iscan_32x16 },
      { default_scan_32x16, av1_default_iscan_32x16 },
      { default_scan_32x16, av1_default_iscan_32x16 },
      { default_scan_32x16, av1_default_iscan_32x16 },
      { mrow_scan_32x16, av1_mrow_iscan_32x16 },
      { mcol_scan_32x16, av1_mcol_iscan_32x16 },
      { mrow_scan_32x16, av1_mrow_iscan_32x16 },
      { mcol_scan_32x16, av1_mcol_iscan_32x16 },
      { mrow_scan_32x16, av1_mrow_iscan_32x16 },
      { mcol_scan_32x16, av1_mcol_iscan_32x16 },
  },
  {
      // TX_4X32
      { default_scan_4x32, av1_default_iscan_4x32 },
      { default_scan_4x32, av1_default_iscan_4x32 },
      { default_scan_4x32, av1_default_iscan_4x32 },
      { default_scan_4x32, av1_default_iscan_4x32 },
      { default_scan_4x32, av1_default_iscan_4x32 },
      { default_scan_4x32, av1_default_iscan_4x32 },
      { default_scan_4x32, av1_default_iscan_4x32 },
      { default_scan_4x32, av1_default_iscan_4x32 },
      { default_scan_4x32, av1_default_iscan_4x32 },
      { default_scan_4x32, av1_default_iscan_4x32 },
      { mrow_scan_4x32, av1_mrow_iscan_4x32 },
      { mcol_scan_4x32, av1_mcol_iscan_4x32 },
      { mrow_scan_4x32, av1_mrow_iscan_4x32 },
      { mcol_scan_4x32, av1_mcol_iscan_4x32 },
      { mrow_scan_4x32, av1_mrow_iscan_4x32 },
      { mcol_scan_4x32, av1_mcol_iscan_4x32 },
  },
  {
      // TX_32X4
      { default_scan_32x4, av1_default_iscan_32x4 },
      { default_scan_32x4, av1_default_iscan_32x4 },
      { default_scan_32x4, av1_default_iscan_32x4 },
      { default_scan_32x4, av1_default_iscan_32x4 },
      { default_scan_32x4, av1_default_iscan_32x4 },
      { default_scan_32x4, av1_default_iscan_32x4 },
      { default_scan_32x4, av1_default_iscan_32x4 },
      { default_scan_32x4, av1_default_iscan_32x4 },
      { default_scan_32x4, av1_default_iscan_32x4 },
      { default_scan_32x4, av1_default_iscan_32x4 },
      { mrow_scan_32x4, av1_mrow_iscan_32x4 },
      { mcol_scan_32x4, av1_mcol_iscan_32x4 },
      { mrow_scan_32x4, av1_mrow_iscan_32x4 },
      { mcol_scan_32x4, av1_mcol_iscan_32x4 },
      { mrow_scan_32x4, av1_mrow_iscan_32x4 },
      { mcol_scan_32x4, av1_mcol_iscan_32x4 },
  },
  {
      // TX_8X64
      // Half of the coefficients of tx64 at higher frequencies are set to
      // zeros. So tx32's scan order is used.
      { default_scan_8x32, av1_default_iscan_8x32 },
      { default_scan_8x32, av1_default_iscan_8x32 },
      { default_scan_8x32, av1_default_iscan_8x32 },
      { default_scan_8x32, av1_default_iscan_8x32 },
      { default_scan_8x32, av1_default_iscan_8x32 },
      { default_scan_8x32, av1_default_iscan_8x32 },
      { default_scan_8x32, av1_default_iscan_8x32 },
      { default_scan_8x32, av1_default_iscan_8x32 },
      { default_scan_8x32, av1_default_iscan_8x32 },
      { default_scan_8x32, av1_default_iscan_8x32 },
      { mrow_scan_8x32, av1_mrow_iscan_8x32 },
      { mcol_scan_8x32, av1_mcol_iscan_8x32 },
      { mrow_scan_8x32, av1_mrow_iscan_8x32 },
      { mcol_scan_8x32, av1_mcol_iscan_8x32 },
      { mrow_scan_8x32, av1_mrow_iscan_8x32 },
      { mcol_scan_8x32, av1_mcol_iscan_8x32 },
  },
  {
      // TX_64X8
      // Half of the coefficients of tx64 at higher frequencies are set to
      // zeros. So tx32's scan order is used.
      { default_scan_32x8, av1_default_iscan_32x8 },
      { default_scan_32x8, av1_default_iscan_32x8 },
      { default_scan_32x8, av1_default_iscan_32x8 },
      { default_scan_32x8, av1_default_iscan_32x8 },
      { default_scan_32x8, av1_default_iscan_32x8 },
      { default_scan_32x8, av1_default_iscan_32x8 },
      { default_scan_32x8, av1_default_iscan_32x8 },
      { default_scan_32x8, av1_default_iscan_32x8 },
      { default_scan_32x8, av1_default_iscan_32x8 },
      { default_scan_32x8, av1_default_iscan_32x8 },
      { mrow_scan_32x8, av1_mrow_iscan_32x8 },
      { mcol_scan_32x8, av1_mcol_iscan_32x8 },
      { mrow_scan_32x8, av1_mrow_iscan_32x8 },
      { mcol_scan_32x8, av1_mcol_iscan_32x8 },
      { mrow_scan_32x8, av1_mrow_iscan_32x8 },
      { mcol_scan_32x8, av1_mcol_iscan_32x8 },
  },
  {
      // TX_4X64
      // Half of the coefficients of tx64 at higher frequencies are set to
      // zeros. So tx32's scan order is used.
      { default_scan_4x32, av1_default_iscan_4x32 },
      { default_scan_4x32, av1_default_iscan_4x32 },
      { default_scan_4x32, av1_default_iscan_4x32 },
      { default_scan_4x32, av1_default_iscan_4x32 },
      { default_scan_4x32, av1_default_iscan_4x32 },
      { default_scan_4x32, av1_default_iscan_4x32 },
      { default_scan_4x32, av1_default_iscan_4x32 },
      { default_scan_4x32, av1_default_iscan_4x32 },
      { default_scan_4x32, av1_default_iscan_4x32 },
      { default_scan_4x32, av1_default_iscan_4x32 },
      { mrow_scan_4x32, av1_mrow_iscan_4x32 },
      { mcol_scan_4x32, av1_mcol_iscan_4x32 },
      { mrow_scan_4x32, av1_mrow_iscan_4x32 },
      { mcol_scan_4x32, av1_mcol_iscan_4x32 },
      { mrow_scan_4x32, av1_mrow_iscan_4x32 },
      { mcol_scan_4x32, av1_mcol_iscan_4x32 },
  },
  {
      // TX_64X4
      // Half of the coefficients of tx64 at higher frequencies are set to
      // zeros. So tx32's scan order is used.
      { default_scan_32x4, av1_default_iscan_32x4 },
      { default_scan_32x4, av1_default_iscan_32x4 },
      { default_scan_32x4, av1_default_iscan_32x4 },
      { default_scan_32x4, av1_default_iscan_32x4 },
      { default_scan_32x4, av1_default_iscan_32x4 },
      { default_scan_32x4, av1_default_iscan_32x4 },
      { default_scan_32x4, av1_default_iscan_32x4 },
      { default_scan_32x4, av1_default_iscan_32x4 },
      { default_scan_32x4, av1_default_iscan_32x4 },
      { default_scan_32x4, av1_default_iscan_32x4 },
      { mrow_scan_32x4, av1_mrow_iscan_32x4 },
      { mcol_scan_32x4, av1_mcol_iscan_32x4 },
      { mrow_scan_32x4, av1_mrow_iscan_32x4 },
      { mcol_scan_32x4, av1_mcol_iscan_32x4 },
      { mrow_scan_32x4, av1_mrow_iscan_32x4 },
      { mcol_scan_32x4, av1_mcol_iscan_32x4 },
  },
};