mirror of
https://github.com/FFmpeg/FFmpeg.git
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158 lines
5.0 KiB
C
158 lines
5.0 KiB
C
/*
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* VC-1 and WMV3 decoder
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* copyright (c) 2006 Konstantin Shishkov
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* (c) 2005 anonymous, Alex Beregszaszi, Michael Niedermayer
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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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* VC-1 tables.
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*/
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#ifndef AVCODEC_VC1DATA_H
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#define AVCODEC_VC1DATA_H
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#include <stdint.h>
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#include "libavutil/rational.h"
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#include "get_bits.h"
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/** Table for conversion between TTBLK and TTMB */
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extern const int ff_vc1_ttblk_to_tt[3][8];
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extern const int ff_vc1_ttfrm_to_tt[4];
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/** MV P mode - the 5th element is only used for mode 1 */
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extern const uint8_t ff_vc1_mv_pmode_table[2][5];
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extern const uint8_t ff_vc1_mv_pmode_table2[2][4];
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extern const int ff_vc1_fps_nr[5], ff_vc1_fps_dr[2];
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extern const uint8_t ff_vc1_pquant_table[3][32];
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/** @name VC-1 VLC tables and defines
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* @todo TODO move this into the context
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*/
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//@{
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#define VC1_BFRACTION_VLC_BITS 7
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extern VLC ff_vc1_bfraction_vlc;
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#define VC1_IMODE_VLC_BITS 4
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extern VLC ff_vc1_imode_vlc;
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#define VC1_NORM2_VLC_BITS 3
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extern VLC ff_vc1_norm2_vlc;
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#define VC1_NORM6_VLC_BITS 9
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extern VLC ff_vc1_norm6_vlc;
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/* Could be optimized, one table only needs 8 bits */
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#define VC1_TTMB_VLC_BITS 9 //12
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extern VLC ff_vc1_ttmb_vlc[3];
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#define VC1_MV_DIFF_VLC_BITS 9 //15
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extern VLC ff_vc1_mv_diff_vlc[4];
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#define VC1_CBPCY_P_VLC_BITS 9 //14
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extern VLC ff_vc1_cbpcy_p_vlc[4];
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#define VC1_4MV_BLOCK_PATTERN_VLC_BITS 6
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extern VLC ff_vc1_4mv_block_pattern_vlc[4];
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#define VC1_TTBLK_VLC_BITS 5
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extern VLC ff_vc1_ttblk_vlc[3];
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#define VC1_SUBBLKPAT_VLC_BITS 6
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extern VLC ff_vc1_subblkpat_vlc[3];
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extern VLC ff_vc1_ac_coeff_table[8];
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//@}
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#if 0 //original bfraction from vc9data.h, not conforming to standard
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/* Denominator used for ff_vc1_bfraction_lut */
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#define B_FRACTION_DEN 840
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/* bfraction is fractional, we scale to the GCD 3*5*7*8 = 840 */
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extern const int16_t ff_vc1_bfraction_lut[23];
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#else
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/* Denominator used for ff_vc1_bfraction_lut */
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#define B_FRACTION_DEN 256
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/* pre-computed scales for all bfractions and base=256 */
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extern const int16_t ff_vc1_bfraction_lut[23];
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#endif
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extern const uint8_t ff_vc1_bfraction_bits[23];
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extern const uint8_t ff_vc1_bfraction_codes[23];
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//Same as H.264
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extern const AVRational ff_vc1_pixel_aspect[16];
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/* BitPlane IMODE - such a small table... */
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extern const uint8_t ff_vc1_imode_codes[7];
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extern const uint8_t ff_vc1_imode_bits[7];
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/* Normal-2 imode */
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extern const uint8_t ff_vc1_norm2_codes[4];
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extern const uint8_t ff_vc1_norm2_bits[4];
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extern const uint16_t ff_vc1_norm6_codes[64];
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extern const uint8_t ff_vc1_norm6_bits[64];
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/* Normal-6 imode */
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extern const uint8_t ff_vc1_norm6_spec[64][5];
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/* 4MV Block pattern VLC tables */
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extern const uint8_t ff_vc1_4mv_block_pattern_codes[4][16];
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extern const uint8_t ff_vc1_4mv_block_pattern_bits[4][16];
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extern const uint8_t wmv3_dc_scale_table[32];
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/* P-Picture CBPCY VLC tables */
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extern const uint16_t ff_vc1_cbpcy_p_codes[4][64];
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extern const uint8_t ff_vc1_cbpcy_p_bits[4][64];
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/* MacroBlock Transform Type: 7.1.3.11, p89
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* 8x8:B
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* 8x4:B:btm 8x4:B:top 8x4:B:both,
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* 4x8:B:right 4x8:B:left 4x8:B:both
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* 4x4:B 8x8:MB
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* 8x4:MB:btm 8x4:MB:top 8x4,MB,both
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* 4x8,MB,right 4x8,MB,left
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* 4x4,MB */
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extern const uint16_t ff_vc1_ttmb_codes[3][16];
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extern const uint8_t ff_vc1_ttmb_bits[3][16];
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/* TTBLK (Transform Type per Block) tables */
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extern const uint8_t ff_vc1_ttblk_codes[3][8];
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extern const uint8_t ff_vc1_ttblk_bits[3][8];
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/* SUBBLKPAT tables, p93-94, reordered */
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extern const uint8_t ff_vc1_subblkpat_codes[3][15];
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extern const uint8_t ff_vc1_subblkpat_bits[3][15];
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/* MV differential tables, p265 */
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extern const uint16_t ff_vc1_mv_diff_codes[4][73];
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extern const uint8_t ff_vc1_mv_diff_bits[4][73];
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/* DC differentials low+hi-mo, p217 are the same as in msmpeg4data .h */
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/* Scantables/ZZ scan are at 11.9 (p262) and 8.1.1.12 (p10) */
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extern const int8_t ff_vc1_simple_progressive_4x4_zz [16];
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extern const int8_t ff_vc1_adv_progressive_8x4_zz [32];
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extern const int8_t ff_vc1_adv_progressive_4x8_zz [32];
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extern const int8_t ff_vc1_adv_interlaced_8x8_zz [64];
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extern const int8_t ff_vc1_adv_interlaced_8x4_zz [32];
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extern const int8_t ff_vc1_adv_interlaced_4x8_zz [32];
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extern const int8_t ff_vc1_adv_interlaced_4x4_zz [16];
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/* DQScale as specified in 8.1.3.9 - almost identical to 0x40000/i */
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extern const int32_t ff_vc1_dqscale[63];
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#endif /* AVCODEC_VC1DATA_H */
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