libavcodec/mpeg12decdata.h

   1 /*
   2  * MPEG1/2 decoder tables
   3  * copyright (c) 2000,2001 Fabrice Bellard
   4  * copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 /**
  24  * @file libavcodec/mpeg12decdata.h
  25  * MPEG1/2 decoder tables.
  26  */
  27
  28 #ifndef AVCODEC_MPEG12DECDATA_H
  29 #define AVCODEC_MPEG12DECDATA_H
  30
  31 #include <stdint.h>
  32 #include "mpegvideo.h"
  33
  34
  35 #define MB_TYPE_ZERO_MV   0x20000000
  36 #define IS_ZERO_MV(a)   ((a)&MB_TYPE_ZERO_MV)
  37
  38 static const uint8_t table_mb_ptype[7][2] = {
  39     { 3, 5 }, // 0x01 MB_INTRA
  40     { 1, 2 }, // 0x02 MB_PAT
  41     { 1, 3 }, // 0x08 MB_FOR
  42     { 1, 1 }, // 0x0A MB_FOR|MB_PAT
  43     { 1, 6 }, // 0x11 MB_QUANT|MB_INTRA
  44     { 1, 5 }, // 0x12 MB_QUANT|MB_PAT
  45     { 2, 5 }, // 0x1A MB_QUANT|MB_FOR|MB_PAT
  46 };
  47
  48 static const uint32_t ptype2mb_type[7] = {
  49                     MB_TYPE_INTRA,
  50                     MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
  51                     MB_TYPE_L0,
  52                     MB_TYPE_L0 | MB_TYPE_CBP,
  53     MB_TYPE_QUANT | MB_TYPE_INTRA,
  54     MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
  55     MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
  56 };
  57
  58 static const uint8_t table_mb_btype[11][2] = {
  59     { 3, 5 }, // 0x01 MB_INTRA
  60     { 2, 3 }, // 0x04 MB_BACK
  61     { 3, 3 }, // 0x06 MB_BACK|MB_PAT
  62     { 2, 4 }, // 0x08 MB_FOR
  63     { 3, 4 }, // 0x0A MB_FOR|MB_PAT
  64     { 2, 2 }, // 0x0C MB_FOR|MB_BACK
  65     { 3, 2 }, // 0x0E MB_FOR|MB_BACK|MB_PAT
  66     { 1, 6 }, // 0x11 MB_QUANT|MB_INTRA
  67     { 2, 6 }, // 0x16 MB_QUANT|MB_BACK|MB_PAT
  68     { 3, 6 }, // 0x1A MB_QUANT|MB_FOR|MB_PAT
  69     { 2, 5 }, // 0x1E MB_QUANT|MB_FOR|MB_BACK|MB_PAT
  70 };
  71
  72 static const uint32_t btype2mb_type[11] = {
  73                     MB_TYPE_INTRA,
  74                     MB_TYPE_L1,
  75                     MB_TYPE_L1   | MB_TYPE_CBP,
  76                     MB_TYPE_L0,
  77                     MB_TYPE_L0   | MB_TYPE_CBP,
  78                     MB_TYPE_L0L1,
  79                     MB_TYPE_L0L1 | MB_TYPE_CBP,
  80     MB_TYPE_QUANT | MB_TYPE_INTRA,
  81     MB_TYPE_QUANT | MB_TYPE_L1   | MB_TYPE_CBP,
  82     MB_TYPE_QUANT | MB_TYPE_L0   | MB_TYPE_CBP,
  83     MB_TYPE_QUANT | MB_TYPE_L0L1 | MB_TYPE_CBP,
  84 };
  85
  86 static const uint8_t non_linear_qscale[32] = {
  87     0, 1, 2, 3, 4, 5, 6, 7,
  88     8,10,12,14,16,18,20,22,
  89     24,28,32,36,40,44,48,52,
  90     56,64,72,80,88,96,104,112,
  91 };
  92
  93 static const uint8_t mpeg2_dc_scale_table1[128]={
  94 //  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
  95     4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
  96     4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
  97     4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
  98     4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
  99 };
 100
 101 static const uint8_t mpeg2_dc_scale_table2[128]={
 102 //  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
 103     2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
 104     2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
 105     2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
 106     2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
 107 };
 108
 109 static const uint8_t mpeg2_dc_scale_table3[128]={
 110 //  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
 111     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
 112     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
 113     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
 114     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
 115 };
 116
 117 static const uint8_t * const mpeg2_dc_scale_table[4]={
 118     ff_mpeg1_dc_scale_table,
 119     mpeg2_dc_scale_table1,
 120     mpeg2_dc_scale_table2,
 121     mpeg2_dc_scale_table3,
 122 };
 123
 124 #endif /* AVCODEC_MPEG12DECDATA_H */