libavcodec/vc1data.h

   1 /*
   2  * VC-1 and WMV3 decoder
   3  * copyright (c) 2006 Konstantin Shishkov
   4  * (c) 2005 anonymous, Alex Beregszaszi, Michael Niedermayer
   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/vc1data.h
  25  * VC-1 tables.
  26  */
  27
  28 #ifndef AVCODEC_VC1DATA_H
  29 #define AVCODEC_VC1DATA_H
  30
  31 #include <stdint.h>
  32 #include "libavutil/rational.h"
  33 #include "bitstream.h"
  34
  35 /** Table for conversion between TTBLK and TTMB */
  36 extern const int ff_vc1_ttblk_to_tt[3][8];
  37
  38 extern const int ff_vc1_ttfrm_to_tt[4];
  39
  40 /** MV P mode - the 5th element is only used for mode 1 */
  41 extern const uint8_t ff_vc1_mv_pmode_table[2][5];
  42 extern const uint8_t ff_vc1_mv_pmode_table2[2][4];
  43
  44 extern const int ff_vc1_fps_nr[5], ff_vc1_fps_dr[2];
  45 extern const uint8_t ff_vc1_pquant_table[3][32];
  46
  47 /** @name VC-1 VLC tables and defines
  48  *  @todo TODO move this into the context
  49  */
  50 //@{
  51 #define VC1_BFRACTION_VLC_BITS 7
  52 extern VLC ff_vc1_bfraction_vlc;
  53 #define VC1_IMODE_VLC_BITS 4
  54 extern VLC ff_vc1_imode_vlc;
  55 #define VC1_NORM2_VLC_BITS 3
  56 extern VLC ff_vc1_norm2_vlc;
  57 #define VC1_NORM6_VLC_BITS 9
  58 extern VLC ff_vc1_norm6_vlc;
  59 /* Could be optimized, one table only needs 8 bits */
  60 #define VC1_TTMB_VLC_BITS 9 //12
  61 extern VLC ff_vc1_ttmb_vlc[3];
  62 #define VC1_MV_DIFF_VLC_BITS 9 //15
  63 extern VLC ff_vc1_mv_diff_vlc[4];
  64 #define VC1_CBPCY_P_VLC_BITS 9 //14
  65 extern VLC ff_vc1_cbpcy_p_vlc[4];
  66 #define VC1_4MV_BLOCK_PATTERN_VLC_BITS 6
  67 extern VLC ff_vc1_4mv_block_pattern_vlc[4];
  68 #define VC1_TTBLK_VLC_BITS 5
  69 extern VLC ff_vc1_ttblk_vlc[3];
  70 #define VC1_SUBBLKPAT_VLC_BITS 6
  71 extern VLC ff_vc1_subblkpat_vlc[3];
  72
  73 extern VLC ff_vc1_ac_coeff_table[8];
  74 //@}
  75
  76
  77 #if 0 //original bfraction from vc9data.h, not conforming to standard
  78 /* Denominator used for ff_vc1_bfraction_lut */
  79 #define B_FRACTION_DEN  840
  80
  81 /* bfraction is fractional, we scale to the GCD 3*5*7*8 = 840 */
  82 extern const int16_t ff_vc1_bfraction_lut[23];
  83 #else
  84 /* Denominator used for ff_vc1_bfraction_lut */
  85 #define B_FRACTION_DEN  256
  86
  87 /* pre-computed scales for all bfractions and base=256 */
  88 extern const int16_t ff_vc1_bfraction_lut[23];
  89 #endif
  90
  91 extern const uint8_t ff_vc1_bfraction_bits[23];
  92 extern const uint8_t ff_vc1_bfraction_codes[23];
  93
  94 //Same as H.264
  95 extern const AVRational ff_vc1_pixel_aspect[16];
  96
  97 /* BitPlane IMODE - such a small table... */
  98 extern const uint8_t ff_vc1_imode_codes[7];
  99 extern const uint8_t ff_vc1_imode_bits[7];
 100
 101 /* Normal-2 imode */
 102 extern const uint8_t ff_vc1_norm2_codes[4];
 103 extern const uint8_t ff_vc1_norm2_bits[4];
 104 extern const uint16_t ff_vc1_norm6_codes[64];
 105 extern const uint8_t ff_vc1_norm6_bits[64];
 106 /* Normal-6 imode */
 107 extern const uint8_t ff_vc1_norm6_spec[64][5];
 108
 109 /* 4MV Block pattern VLC tables */
 110 extern const uint8_t ff_vc1_4mv_block_pattern_codes[4][16];
 111 extern const uint8_t ff_vc1_4mv_block_pattern_bits[4][16];
 112
 113 extern const uint8_t wmv3_dc_scale_table[32];
 114
 115 /* P-Picture CBPCY VLC tables */
 116 extern const uint16_t ff_vc1_cbpcy_p_codes[4][64];
 117 extern const uint8_t ff_vc1_cbpcy_p_bits[4][64];
 118
 119 /* MacroBlock Transform Type: 7.1.3.11, p89
 120  * 8x8:B
 121  * 8x4:B:btm  8x4:B:top  8x4:B:both,
 122  * 4x8:B:right  4x8:B:left  4x8:B:both
 123  * 4x4:B  8x8:MB
 124  * 8x4:MB:btm  8x4:MB:top  8x4,MB,both
 125  * 4x8,MB,right  4x8,MB,left
 126  * 4x4,MB                               */
 127 extern const uint16_t ff_vc1_ttmb_codes[3][16];
 128
 129 extern const uint8_t ff_vc1_ttmb_bits[3][16];
 130
 131 /* TTBLK (Transform Type per Block) tables */
 132 extern const uint8_t ff_vc1_ttblk_codes[3][8];
 133 extern const uint8_t ff_vc1_ttblk_bits[3][8];
 134
 135 /* SUBBLKPAT tables, p93-94, reordered */
 136 extern const uint8_t ff_vc1_subblkpat_codes[3][15];
 137 extern const uint8_t ff_vc1_subblkpat_bits[3][15];
 138
 139 /* MV differential tables, p265 */
 140 extern const uint16_t ff_vc1_mv_diff_codes[4][73];
 141 extern const uint8_t ff_vc1_mv_diff_bits[4][73];
 142
 143 /* DC differentials low+hi-mo, p217 are the same as in msmpeg4data .h */
 144
 145 /* Scantables/ZZ scan are at 11.9 (p262) and 8.1.1.12 (p10) */
 146 extern const int8_t ff_vc1_simple_progressive_4x4_zz [16];
 147 extern const int8_t ff_vc1_adv_progressive_8x4_zz [32];
 148 extern const int8_t ff_vc1_adv_progressive_4x8_zz [32];
 149 extern const int8_t ff_vc1_adv_interlaced_8x8_zz [64];
 150 extern const int8_t ff_vc1_adv_interlaced_8x4_zz [32];
 151 extern const int8_t ff_vc1_adv_interlaced_4x8_zz [32];
 152 extern const int8_t ff_vc1_adv_interlaced_4x4_zz [16];
 153
 154 /* DQScale as specified in 8.1.3.9 - almost identical to 0x40000/i */
 155 extern const int32_t ff_vc1_dqscale[63];
 156
 157 #endif /* AVCODEC_VC1DATA_H */