| /* |
| * Copyright (c) 2010 The WebM project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| |
| #include "quant_common.h" |
| |
| |
| #if !CONFIG_EXTEND_QRANGE |
| static const int dc_qlookup[QINDEX_RANGE] = |
| { |
| 4, 5, 6, 7, 8, 9, 10, 10, 11, 12, 13, 14, 15, 16, 17, 17, |
| 18, 19, 20, 20, 21, 21, 22, 22, 23, 23, 24, 25, 25, 26, 27, 28, |
| 29, 30, 31, 32, 33, 34, 35, 36, 37, 37, 38, 39, 40, 41, 42, 43, |
| 44, 45, 46, 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, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, |
| 91, 93, 95, 96, 98, 100, 101, 102, 104, 106, 108, 110, 112, 114, 116, 118, |
| 122, 124, 126, 128, 130, 132, 134, 136, 138, 140, 143, 145, 148, 151, 154, 157, |
| }; |
| |
| static const int ac_qlookup[QINDEX_RANGE] = |
| { |
| 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, 60, 62, 64, 66, 68, 70, 72, 74, 76, |
| 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, |
| 110, 112, 114, 116, 119, 122, 125, 128, 131, 134, 137, 140, 143, 146, 149, 152, |
| 155, 158, 161, 164, 167, 170, 173, 177, 181, 185, 189, 193, 197, 201, 205, 209, |
| 213, 217, 221, 225, 229, 234, 239, 245, 249, 254, 259, 264, 269, 274, 279, 284, |
| }; |
| #else |
| /*static int dc_qlookup[QINDEX_RANGE] = |
| { |
| 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, |
| 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 38, 40, 42, 44, 47, |
| 50, 53, 56, 59, 62, 65, 68, 68, 72, 76, 80, 80, 84, 84, 86, 90, |
| 91, 96, 98, 102, 107, 112, 118, 124, 130, 136, 142, 148, 150, 156, 162, 168, |
| 174, 180, 182, 188, 196, 200, 204, 208, 212, 216, 220, 224, 228, 232, 236, 240, |
| 244, 249, 255, 260, 264, 269, 276, 281, 288, 293, 300, 303, 307, 312, 317, 323, |
| 328, 331, 338, 344, 347, 354, 366, 378, 386, 398, 401, 411, 422, 432, 441, 451, |
| 464, 483, 496, 507, 520, 529, 540, 551, 570, 585, 604, 624, 645, 667, 692, 718, |
| |
| }; |
| static int ac_qlookup[QINDEX_RANGE] = |
| { |
| 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, |
| 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 51, |
| 54, 57, 60, 63, 66, 69, 72, 76, 80, 84, 88, 92, 96, 100, 105, 110, |
| 115, 120, 125, 130, 135, 140, 146, 152, 158, 164, 170, 176, 182, 188, 194, 200, |
| 206, 212, 218, 224, 232, 240, 248, 256, 264, 272, 280, 288, 296, 304, 312, 320, |
| 330, 340, 350, 360, 370, 380, 392, 404, 416, 428, 440, 454, 468, 482, 496, 510, |
| 524, 540, 556, 572, 588, 604, 622, 640, 658, 676, 696, 716, 736, 756, 776, 796, |
| 820, 844, 868, 892, 916, 944, 972, 1000, 1032, 1064, 1096, 1128, 1168, 1208, 1252, 1300 |
| };*/ |
| |
| static int dc_qlookup[QINDEX_RANGE] = |
| { |
| 4, 5, 6, 7, 8, 9, 10, 10, 11, 12, 13, 14, 15, 16, 17, 17, |
| 18, 19, 20, 20, 21, 21, 22, 22, 23, 23, 24, 25, 25, 26, 27, 28, |
| 29, 30, 31, 32, 33, 34, 35, 36, 37, 37, 38, 39, 40, 41, 42, 43, |
| 44, 45, 46, 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, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, |
| 91, 93, 95, 96, 98, 100, 101, 102, 104, 106, 108, 110, 112, 114, 116, 118, |
| 122, 124, 126, 128, 130, 132, 134, 136, 138, 140, 143, 145, 148, 151, 154, 157, |
| }; |
| |
| static int ac_qlookup[QINDEX_RANGE] = |
| { |
| 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, 60, 62, 64, 66, 68, 70, 72, 74, 76, |
| 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, |
| 110, 112, 114, 116, 119, 122, 125, 128, 131, 134, 137, 140, 143, 146, 149, 152, |
| 155, 158, 161, 164, 167, 170, 173, 177, 181, 185, 189, 193, 197, 201, 205, 209, |
| 213, 217, 221, 225, 229, 234, 239, 245, 249, 254, 259, 264, 269, 274, 279, 284, |
| }; |
| |
| //static int dc_qlookup[QINDEX_RANGE]; |
| //static int ac_qlookup[QINDEX_RANGE]; |
| |
| #endif |
| |
| #if CONFIG_EXTEND_QRANGE |
| #define ACDC_MIN 4 |
| void vp8_init_quant_tables() |
| { |
| int i; |
| int current_val = 4; |
| int last_val = 4; |
| int ac_val; |
| int dc_max; |
| |
| for ( i = 0; i < QINDEX_RANGE; i++ ) |
| { |
| ac_qlookup[i] = ac_qlookup[i] << 2; |
| dc_qlookup[i] = dc_qlookup[i] << 2; |
| } |
| |
| // Not active by default for now. |
| return; |
| |
| for ( i = 0; i < QINDEX_RANGE; i++ ) |
| { |
| ac_qlookup[i] = current_val; |
| current_val = (int)((double)current_val * 1.042); |
| //current_val = (int)((double)current_val * 1.01765); |
| if ( current_val == last_val ) |
| current_val++; |
| last_val = current_val; |
| |
| ac_val = ac_qlookup[i]; |
| dc_max = (int)(((double)ac_val * 0.75) + 0.5); |
| dc_qlookup[i] = (0.000000305 * ac_val * ac_val * ac_val) + |
| (-0.00065 * ac_val * ac_val) + |
| (0.9 * ac_val) + 0.5; |
| if ( dc_qlookup[i] > dc_max ) |
| dc_qlookup[i] = dc_max; |
| if ( dc_qlookup[i] < ACDC_MIN ) |
| dc_qlookup[i] = ACDC_MIN; |
| } |
| } |
| #endif |
| |
| int vp8_dc_quant(int QIndex, int Delta) |
| { |
| int retval; |
| |
| QIndex = QIndex + Delta; |
| |
| if (QIndex > MAXQ) |
| QIndex = MAXQ; |
| else if (QIndex < 0) |
| QIndex = 0; |
| |
| retval = dc_qlookup[ QIndex ]; |
| return retval; |
| } |
| |
| int vp8_dc2quant(int QIndex, int Delta) |
| { |
| int retval; |
| |
| QIndex = QIndex + Delta; |
| |
| if (QIndex > MAXQ) |
| QIndex = MAXQ; |
| else if (QIndex < 0) |
| QIndex = 0; |
| |
| #if !CONFIG_EXTEND_QRANGE |
| retval = dc_qlookup[ QIndex ] * 2; |
| #else |
| retval = dc_qlookup[ QIndex ]; |
| #endif |
| return retval; |
| |
| } |
| int vp8_dc_uv_quant(int QIndex, int Delta) |
| { |
| int retval; |
| |
| QIndex = QIndex + Delta; |
| |
| if (QIndex > MAXQ) |
| QIndex = MAXQ; |
| else if (QIndex < 0) |
| QIndex = 0; |
| |
| retval = dc_qlookup[ QIndex ]; |
| |
| return retval; |
| } |
| |
| int vp8_ac_yquant(int QIndex) |
| { |
| int retval; |
| |
| if (QIndex > MAXQ) |
| QIndex = MAXQ; |
| else if (QIndex < 0) |
| QIndex = 0; |
| |
| retval = ac_qlookup[ QIndex ]; |
| return retval; |
| } |
| |
| int vp8_ac2quant(int QIndex, int Delta) |
| { |
| int retval; |
| |
| QIndex = QIndex + Delta; |
| |
| if (QIndex > MAXQ) |
| QIndex = MAXQ; |
| else if (QIndex < 0) |
| QIndex = 0; |
| #if !CONFIG_EXTEND_QRANGE |
| retval = (ac_qlookup[ QIndex ] * 155) / 100; |
| if (retval < 8) |
| retval = 8; |
| #else |
| retval = (ac_qlookup[ QIndex ] * 775) / 1000; |
| if (retval < 4) |
| retval = 4; |
| #endif |
| return retval; |
| } |
| int vp8_ac_uv_quant(int QIndex, int Delta) |
| { |
| int retval; |
| |
| QIndex = QIndex + Delta; |
| |
| if (QIndex > MAXQ) |
| QIndex = MAXQ; |
| else if (QIndex < 0) |
| QIndex = 0; |
| |
| retval = ac_qlookup[ QIndex ]; |
| return retval; |
| } |
