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