mirror of https://git.ffmpeg.org/ffmpeg.git
158 lines
5.6 KiB
C
158 lines
5.6 KiB
C
/*
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* Quant and Weight for DV codec
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* Copyright (c) 2002 Fabrice Bellard
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Constants for DV codec.
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*/
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#ifndef AVCODEC_DVQUANT_H
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#define AVCODEC_DVQUANT_H
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#include <stdint.h>
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/* unquant tables (not used directly) */
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static const uint8_t dv_quant_shifts[22][4] = {
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{ 3,3,4,4 },
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{ 3,3,4,4 },
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{ 2,3,3,4 },
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{ 2,3,3,4 },
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{ 2,2,3,3 },
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{ 2,2,3,3 },
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{ 1,2,2,3 },
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{ 1,2,2,3 },
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{ 1,1,2,2 },
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{ 1,1,2,2 },
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{ 0,1,1,2 },
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{ 0,1,1,2 },
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{ 0,0,1,1 },
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{ 0,0,1,1 },
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{ 0,0,0,1 },
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{ 0,0,0,0 },
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{ 0,0,0,0 },
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{ 0,0,0,0 },
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{ 0,0,0,0 },
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{ 0,0,0,0 },
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{ 0,0,0,0 },
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{ 0,0,0,0 },
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};
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static const uint8_t dv_quant_offset[4] = { 6, 3, 0, 1 };
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static const uint8_t dv_quant_areas[4] = { 6, 21, 43, 64 };
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/* quantization quanta by QNO for DV100 */
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static const uint8_t dv100_qstep[16] = {
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1, /* QNO = 0 and 1 both have no quantization */
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1,
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2, 3, 4, 5, 6, 7, 8, 16, 18, 20, 22, 24, 28, 52
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};
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/* DV25/50 DCT coefficient weights and inverse weights */
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/* created by dvtables.py */
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static const int dv_weight_bits = 18;
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static const int dv_weight_88[64] = {
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131072, 257107, 257107, 242189, 252167, 242189, 235923, 237536,
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237536, 235923, 229376, 231390, 223754, 231390, 229376, 222935,
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224969, 217965, 217965, 224969, 222935, 200636, 218652, 211916,
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212325, 211916, 218652, 200636, 188995, 196781, 205965, 206433,
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206433, 205965, 196781, 188995, 185364, 185364, 200636, 200704,
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200636, 185364, 185364, 174609, 180568, 195068, 195068, 180568,
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174609, 170091, 175557, 189591, 175557, 170091, 165371, 170627,
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170627, 165371, 160727, 153560, 160727, 144651, 144651, 136258,
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};
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static const int dv_weight_248[64] = {
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131072, 242189, 257107, 237536, 229376, 200636, 242189, 223754,
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224969, 196781, 262144, 242189, 229376, 200636, 257107, 237536,
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211916, 185364, 235923, 217965, 229376, 211916, 206433, 180568,
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242189, 223754, 224969, 196781, 211916, 185364, 235923, 217965,
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200704, 175557, 222935, 205965, 200636, 185364, 195068, 170627,
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229376, 211916, 206433, 180568, 200704, 175557, 222935, 205965,
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175557, 153560, 188995, 174609, 165371, 144651, 200636, 185364,
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195068, 170627, 175557, 153560, 188995, 174609, 165371, 144651,
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};
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static const int dv_iweight_bits = 14;
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static const int dv_iweight_88[64] = {
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32768, 16710, 16710, 17735, 17015, 17735, 18197, 18079,
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18079, 18197, 18725, 18559, 19196, 18559, 18725, 19284,
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19108, 19692, 19692, 19108, 19284, 21400, 19645, 20262,
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20214, 20262, 19645, 21400, 22733, 21845, 20867, 20815,
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20815, 20867, 21845, 22733, 23173, 23173, 21400, 21400,
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21400, 23173, 23173, 24600, 23764, 22017, 22017, 23764,
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24600, 25267, 24457, 22672, 24457, 25267, 25971, 25191,
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25191, 25971, 26715, 27962, 26715, 29642, 29642, 31536,
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};
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static const int dv_iweight_248[64] = {
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32768, 17735, 16710, 18079, 18725, 21400, 17735, 19196,
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19108, 21845, 16384, 17735, 18725, 21400, 16710, 18079,
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20262, 23173, 18197, 19692, 18725, 20262, 20815, 23764,
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17735, 19196, 19108, 21845, 20262, 23173, 18197, 19692,
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21400, 24457, 19284, 20867, 21400, 23173, 22017, 25191,
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18725, 20262, 20815, 23764, 21400, 24457, 19284, 20867,
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24457, 27962, 22733, 24600, 25971, 29642, 21400, 23173,
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22017, 25191, 24457, 27962, 22733, 24600, 25971, 29642,
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};
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/**
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* The "inverse" DV100 weights are actually just the spec weights (zig-zagged).
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*/
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static const int dv_iweight_1080_y[64] = {
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128, 16, 16, 17, 17, 17, 18, 18,
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18, 18, 18, 18, 19, 18, 18, 19,
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19, 19, 19, 19, 19, 42, 38, 40,
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40, 40, 38, 42, 44, 43, 41, 41,
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41, 41, 43, 44, 45, 45, 42, 42,
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42, 45, 45, 48, 46, 43, 43, 46,
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48, 49, 48, 44, 48, 49, 101, 98,
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98, 101, 104, 109, 104, 116, 116, 123,
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};
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static const int dv_iweight_1080_c[64] = {
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128, 16, 16, 17, 17, 17, 25, 25,
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25, 25, 26, 25, 26, 25, 26, 26,
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26, 27, 27, 26, 26, 42, 38, 40,
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40, 40, 38, 42, 44, 43, 41, 41,
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41, 41, 43, 44, 91, 91, 84, 84,
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84, 91, 91, 96, 93, 86, 86, 93,
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96, 197, 191, 177, 191, 197, 203, 197,
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197, 203, 209, 219, 209, 232, 232, 246,
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};
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static const int dv_iweight_720_y[64] = {
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128, 16, 16, 17, 17, 17, 18, 18,
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18, 18, 18, 18, 19, 18, 18, 19,
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19, 19, 19, 19, 19, 42, 38, 40,
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40, 40, 38, 42, 44, 43, 41, 41,
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41, 41, 43, 44, 68, 68, 63, 63,
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63, 68, 68, 96, 92, 86, 86, 92,
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96, 98, 96, 88, 96, 98, 202, 196,
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196, 202, 208, 218, 208, 232, 232, 246,
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};
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static const int dv_iweight_720_c[64] = {
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128, 24, 24, 26, 26, 26, 36, 36,
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36, 36, 36, 36, 38, 36, 36, 38,
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38, 38, 38, 38, 38, 84, 76, 80,
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80, 80, 76, 84, 88, 86, 82, 82,
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82, 82, 86, 88, 182, 182, 168, 168,
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168, 182, 182, 192, 186, 192, 172, 186,
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192, 394, 382, 354, 382, 394, 406, 394,
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394, 406, 418, 438, 418, 464, 464, 492,
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};
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#endif /* AVCODEC_DVQUANT_H */
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