FFmpeg/libavcodec/vc1data.h

/*
 * VC-1 and WMV3 decoder
 * copyright (c) 2006 Konstantin Shishkov
 * (c) 2005 anonymous, Alex Beregszaszi, Michael Niedermayer
 *
 * 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
 * VC-1 tables.
 */

#ifndef AVCODEC_VC1DATA_H
#define AVCODEC_VC1DATA_H

#include <stdint.h>
#include "libavutil/rational.h"
#include "get_bits.h"

/** Table for conversion between TTBLK and TTMB */
extern const int ff_vc1_ttblk_to_tt[3][8];

extern const int ff_vc1_ttfrm_to_tt[4];

/** MV P mode - the 5th element is only used for mode 1 */
extern const uint8_t ff_vc1_mv_pmode_table[2][5];
extern const uint8_t ff_vc1_mv_pmode_table2[2][4];

extern const int ff_vc1_fps_nr[5], ff_vc1_fps_dr[2];
extern const uint8_t ff_vc1_pquant_table[3][32];

/** @name VC-1 VLC tables and defines
 *  @todo TODO move this into the context
 */
//@{
#define VC1_BFRACTION_VLC_BITS 7
extern VLC ff_vc1_bfraction_vlc;
#define VC1_IMODE_VLC_BITS 4
extern VLC ff_vc1_imode_vlc;
#define VC1_NORM2_VLC_BITS 3
extern VLC ff_vc1_norm2_vlc;
#define VC1_NORM6_VLC_BITS 9
extern VLC ff_vc1_norm6_vlc;
/* Could be optimized, one table only needs 8 bits */
#define VC1_TTMB_VLC_BITS 9 //12
extern VLC ff_vc1_ttmb_vlc[3];
#define VC1_MV_DIFF_VLC_BITS 9 //15
extern VLC ff_vc1_mv_diff_vlc[4];
#define VC1_CBPCY_P_VLC_BITS 9 //14
extern VLC ff_vc1_cbpcy_p_vlc[4];
#define VC1_4MV_BLOCK_PATTERN_VLC_BITS 6
extern VLC ff_vc1_4mv_block_pattern_vlc[4];
#define VC1_TTBLK_VLC_BITS 5
extern VLC ff_vc1_ttblk_vlc[3];
#define VC1_SUBBLKPAT_VLC_BITS 6
extern VLC ff_vc1_subblkpat_vlc[3];

extern VLC ff_vc1_ac_coeff_table[8];
//@}


#if 0 //original bfraction from vc9data.h, not conforming to standard
/* Denominator used for ff_vc1_bfraction_lut */
#define B_FRACTION_DEN  840

/* bfraction is fractional, we scale to the GCD 3*5*7*8 = 840 */
extern const int16_t ff_vc1_bfraction_lut[23];
#else
/* Denominator used for ff_vc1_bfraction_lut */
#define B_FRACTION_DEN  256

/* pre-computed scales for all bfractions and base=256 */
extern const int16_t ff_vc1_bfraction_lut[23];
#endif

extern const uint8_t ff_vc1_bfraction_bits[23];
extern const uint8_t ff_vc1_bfraction_codes[23];

//Same as H.264
extern const AVRational ff_vc1_pixel_aspect[16];

/* BitPlane IMODE - such a small table... */
extern const uint8_t ff_vc1_imode_codes[7];
extern const uint8_t ff_vc1_imode_bits[7];

/* Normal-2 imode */
extern const uint8_t ff_vc1_norm2_codes[4];
extern const uint8_t ff_vc1_norm2_bits[4];
extern const uint16_t ff_vc1_norm6_codes[64];
extern const uint8_t ff_vc1_norm6_bits[64];
/* Normal-6 imode */
extern const uint8_t ff_vc1_norm6_spec[64][5];

/* 4MV Block pattern VLC tables */
extern const uint8_t ff_vc1_4mv_block_pattern_codes[4][16];
extern const uint8_t ff_vc1_4mv_block_pattern_bits[4][16];

extern const uint8_t wmv3_dc_scale_table[32];

/* P-Picture CBPCY VLC tables */
extern const uint16_t ff_vc1_cbpcy_p_codes[4][64];
extern const uint8_t ff_vc1_cbpcy_p_bits[4][64];

/* MacroBlock Transform Type: 7.1.3.11, p89
 * 8x8:B
 * 8x4:B:btm  8x4:B:top  8x4:B:both,
 * 4x8:B:right  4x8:B:left  4x8:B:both
 * 4x4:B  8x8:MB
 * 8x4:MB:btm  8x4:MB:top  8x4,MB,both
 * 4x8,MB,right  4x8,MB,left
 * 4x4,MB                               */
extern const uint16_t ff_vc1_ttmb_codes[3][16];

extern const uint8_t ff_vc1_ttmb_bits[3][16];

/* TTBLK (Transform Type per Block) tables */
extern const uint8_t ff_vc1_ttblk_codes[3][8];
extern const uint8_t ff_vc1_ttblk_bits[3][8];

/* SUBBLKPAT tables, p93-94, reordered */
extern const uint8_t ff_vc1_subblkpat_codes[3][15];
extern const uint8_t ff_vc1_subblkpat_bits[3][15];

/* MV differential tables, p265 */
extern const uint16_t ff_vc1_mv_diff_codes[4][73];
extern const uint8_t ff_vc1_mv_diff_bits[4][73];

/* DC differentials low+hi-mo, p217 are the same as in msmpeg4data .h */

/* Scantables/ZZ scan are at 11.9 (p262) and 8.1.1.12 (p10) */
extern const int8_t ff_vc1_simple_progressive_4x4_zz [16];
extern const int8_t ff_vc1_adv_progressive_8x4_zz [32];
extern const int8_t ff_vc1_adv_progressive_4x8_zz [32];
extern const int8_t ff_vc1_adv_interlaced_8x8_zz [64];
extern const int8_t ff_vc1_adv_interlaced_8x4_zz [32];
extern const int8_t ff_vc1_adv_interlaced_4x8_zz [32];
extern const int8_t ff_vc1_adv_interlaced_4x4_zz [16];

/* DQScale as specified in 8.1.3.9 - almost identical to 0x40000/i */
extern const int32_t ff_vc1_dqscale[63];

#endif /* AVCODEC_VC1DATA_H */