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/*
* VC-1 and WMV3 decoder
* Copyright (c) 2006-2007 Konstantin Shishkov
* Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_VC1_H
#define AVCODEC_VC1_H
#include "avcodec.h"
#include "mpegvideo.h"
#include "intrax8.h"
/** Markers used in VC-1 AP frame data */
//@{
enum VC1Code{
VC1_CODE_RES0 = 0x00000100,
VC1_CODE_ENDOFSEQ = 0x0000010A,
VC1_CODE_SLICE,
VC1_CODE_FIELD,
VC1_CODE_FRAME,
VC1_CODE_ENTRYPOINT,
VC1_CODE_SEQHDR,
};
//@}
#define IS_MARKER(x) (((x) & ~0xFF) == VC1_CODE_RES0)
/** Available Profiles */
//@{
enum Profile {
PROFILE_SIMPLE,
PROFILE_MAIN,
PROFILE_COMPLEX, ///< TODO: WMV9 specific
PROFILE_ADVANCED
};
//@}
/** Sequence quantizer mode */
//@{
enum QuantMode {
QUANT_FRAME_IMPLICIT, ///< Implicitly specified at frame level
QUANT_FRAME_EXPLICIT, ///< Explicitly specified at frame level
QUANT_NON_UNIFORM, ///< Non-uniform quant used for all frames
QUANT_UNIFORM ///< Uniform quant used for all frames
};
//@}
/** Where quant can be changed */
//@{
enum DQProfile {
DQPROFILE_FOUR_EDGES,
DQPROFILE_DOUBLE_EDGES,
DQPROFILE_SINGLE_EDGE,
DQPROFILE_ALL_MBS
};
//@}
/** @name Where quant can be changed
*/
//@{
enum DQSingleEdge {
DQSINGLE_BEDGE_LEFT,
DQSINGLE_BEDGE_TOP,
DQSINGLE_BEDGE_RIGHT,
DQSINGLE_BEDGE_BOTTOM
};
//@}
/** Which pair of edges is quantized with ALTPQUANT */
//@{
enum DQDoubleEdge {
DQDOUBLE_BEDGE_TOPLEFT,
DQDOUBLE_BEDGE_TOPRIGHT,
DQDOUBLE_BEDGE_BOTTOMRIGHT,
DQDOUBLE_BEDGE_BOTTOMLEFT
};
//@}
/** MV modes for P frames */
//@{
enum MVModes {
MV_PMODE_1MV_HPEL_BILIN,
MV_PMODE_1MV,
MV_PMODE_1MV_HPEL,
MV_PMODE_MIXED_MV,
MV_PMODE_INTENSITY_COMP
};
//@}
/** @name MV types for B frames */
//@{
enum BMVTypes {
BMV_TYPE_BACKWARD,
BMV_TYPE_FORWARD,
BMV_TYPE_INTERPOLATED
};
//@}
/** @name Block types for P/B frames */
//@{
enum TransformTypes {
TT_8X8,
TT_8X4_BOTTOM,
TT_8X4_TOP,
TT_8X4, //Both halves
TT_4X8_RIGHT,
TT_4X8_LEFT,
TT_4X8, //Both halves
TT_4X4
};
//@}
enum CodingSet {
CS_HIGH_MOT_INTRA = 0,
CS_HIGH_MOT_INTER,
CS_LOW_MOT_INTRA,
CS_LOW_MOT_INTER,
CS_MID_RATE_INTRA,
CS_MID_RATE_INTER,
CS_HIGH_RATE_INTRA,
CS_HIGH_RATE_INTER
};
/** @name Overlap conditions for Advanced Profile */
//@{
enum COTypes {
CONDOVER_NONE = 0,
CONDOVER_ALL,
CONDOVER_SELECT
};
//@}
/** The VC1 Context
* @todo Change size wherever another size is more efficient
* Many members are only used for Advanced Profile
*/
typedef struct VC1Context{
MpegEncContext s;
IntraX8Context x8;
int bits;
/** Simple/Main Profile sequence header */
//@{
int res_sprite; ///< reserved, sprite mode
int res_y411; ///< reserved, old interlaced mode
int res_x8; ///< reserved
int multires; ///< frame-level RESPIC syntax element present
int res_fasttx; ///< reserved, always 1
int res_transtab; ///< reserved, always 0
int rangered; ///< RANGEREDFRM (range reduction) syntax element present
///< at frame level
int res_rtm_flag; ///< reserved, set to 1
int reserved; ///< reserved
//@}
/** Advanced Profile */
//@{
int level; ///< 3bits, for Advanced/Simple Profile, provided by TS layer
int chromaformat; ///< 2bits, 2=4:2:0, only defined
int postprocflag; ///< Per-frame processing suggestion flag present
int broadcast; ///< TFF/RFF present
int interlace; ///< Progressive/interlaced (RPTFTM syntax element)
int tfcntrflag; ///< TFCNTR present
int panscanflag; ///< NUMPANSCANWIN, TOPLEFT{X,Y}, BOTRIGHT{X,Y} present
int refdist_flag; ///< REFDIST syntax element present in II, IP, PI or PP field picture headers
int extended_dmv; ///< Additional extended dmv range at P/B frame-level
int color_prim; ///< 8bits, chroma coordinates of the color primaries
int transfer_char; ///< 8bits, Opto-electronic transfer characteristics
int matrix_coef; ///< 8bits, Color primaries->YCbCr transform matrix
int hrd_param_flag; ///< Presence of Hypothetical Reference
///< Decoder parameters
int psf; ///< Progressive Segmented Frame
//@}
/** Sequence header data for all Profiles
* TODO: choose between ints, uint8_ts and monobit flags
*/
//@{
int profile; ///< 2bits, Profile
int frmrtq_postproc; ///< 3bits,
int bitrtq_postproc; ///< 5bits, quantized framerate-based postprocessing strength
int fastuvmc; ///< Rounding of qpel vector to hpel ? (not in Simple)
int extended_mv; ///< Ext MV in P/B (not in Simple)
int dquant; ///< How qscale varies with MBs, 2bits (not in Simple)
int vstransform; ///< variable-size [48]x[48] transform type + info
int overlap; ///< overlapped transforms in use
int quantizer_mode; ///< 2bits, quantizer mode used for sequence, see QUANT_*
int finterpflag; ///< INTERPFRM present
//@}
/** Frame decoding info for all profiles */
//@{
uint8_t mv_mode; ///< MV coding monde
uint8_t mv_mode2; ///< Secondary MV coding mode (B frames)
int k_x; ///< Number of bits for MVs (depends on MV range)
int k_y; ///< Number of bits for MVs (depends on MV range)
int range_x, range_y; ///< MV range
uint8_t pq, altpq; ///< Current/alternate frame quantizer scale
const uint8_t* zz_8x4;///< Zigzag scan table for TT_8x4 coding mode
const uint8_t* zz_4x8;///< Zigzag scan table for TT_4x8 coding mode
/** pquant parameters */
//@{
uint8_t dquantfrm;
uint8_t dqprofile;
uint8_t dqsbedge;
uint8_t dqbilevel;
//@}
/** AC coding set indexes
* @see 8.1.1.10, p(1)10
*/
//@{
int c_ac_table_index; ///< Chroma index from ACFRM element
int y_ac_table_index; ///< Luma index from AC2FRM element
//@}
int ttfrm; ///< Transform type info present at frame level
uint8_t ttmbf; ///< Transform type flag
uint8_t ttblk4x4; ///< Value of ttblk which indicates a 4x4 transform
int codingset; ///< index of current table set from 11.8 to use for luma block decoding
int codingset2; ///< index of current table set from 11.8 to use for chroma block decoding
int pqindex; ///< raw pqindex used in coding set selection
int a_avail, c_avail;
uint8_t *mb_type_base, *mb_type[3];
/** Luma compensation parameters */
//@{
uint8_t lumscale;
uint8_t lumshift;
//@}
int16_t bfraction; ///< Relative position % anchors=> how to scale MVs
uint8_t halfpq; ///< Uniform quant over image and qp+.5
uint8_t respic; ///< Frame-level flag for resized images
int buffer_fullness; ///< HRD info
/** Ranges:
* -# 0 -> [-64n 63.f] x [-32, 31.f]
* -# 1 -> [-128, 127.f] x [-64, 63.f]
* -# 2 -> [-512, 511.f] x [-128, 127.f]
* -# 3 -> [-1024, 1023.f] x [-256, 255.f]
*/
uint8_t mvrange;
uint8_t pquantizer; ///< Uniform (over sequence) quantizer in use
VLC *cbpcy_vlc; ///< CBPCY VLC table
int tt_index; ///< Index for Transform Type tables
uint8_t* mv_type_mb_plane; ///< bitplane for mv_type == (4MV)
uint8_t* direct_mb_plane; ///< bitplane for "direct" MBs
int mv_type_is_raw; ///< mv type mb plane is not coded
int dmb_is_raw; ///< direct mb plane is raw
int skip_is_raw; ///< skip mb plane is not coded
uint8_t luty[256], lutuv[256]; // lookup tables used for intensity compensation
int use_ic; ///< use intensity compensation in B-frames
int rnd; ///< rounding control
/** Frame decoding info for S/M profiles only */
//@{
uint8_t rangeredfrm; ///< out_sample = CLIP((in_sample-128)*2+128)
uint8_t interpfrm;
//@}
/** Frame decoding info for Advanced profile */
//@{
uint8_t fcm; ///< 0->Progressive, 2->Frame-Interlace, 3->Field-Interlace
uint8_t numpanscanwin;
uint8_t tfcntr;
uint8_t rptfrm, tff, rff;
uint16_t topleftx;
uint16_t toplefty;
uint16_t bottomrightx;
uint16_t bottomrighty;
uint8_t uvsamp;
uint8_t postproc;
int hrd_num_leaky_buckets;
uint8_t bit_rate_exponent;
uint8_t buffer_size_exponent;
uint8_t* acpred_plane; ///< AC prediction flags bitplane
int acpred_is_raw;
uint8_t* over_flags_plane; ///< Overflags bitplane
int overflg_is_raw;
uint8_t condover;
uint16_t *hrd_rate, *hrd_buffer;
uint8_t *hrd_fullness;
uint8_t range_mapy_flag;
uint8_t range_mapuv_flag;
uint8_t range_mapy;
uint8_t range_mapuv;
//@}
int p_frame_skipped;
int bi_type;
int x8_type;
uint32_t *cbp_base, *cbp;
uint8_t bfraction_lut_index;///< Index for BFRACTION value (see Table 40, reproduced into ff_vc1_bfraction_lut[])
uint8_t broken_link; ///< Broken link flag (BROKEN_LINK syntax element)
uint8_t closed_entry; ///< Closed entry point flag (CLOSED_ENTRY syntax element)
int parse_only; ///< Context is used within parser
int warn_interlaced;
} VC1Context;
/** Find VC-1 marker in buffer
* @return position where next marker starts or end of buffer if no marker found
*/
static av_always_inline const uint8_t* find_next_marker(const uint8_t *src, const uint8_t *end)
{
uint32_t mrk = 0xFFFFFFFF;
if(end-src < 4) return end;
while(src < end){
mrk = (mrk << 8) | *src++;
if(IS_MARKER(mrk))
return src-4;
}
return end;
}
static av_always_inline int vc1_unescape_buffer(const uint8_t *src, int size, uint8_t *dst)
{
int dsize = 0, i;
if(size < 4){
for(dsize = 0; dsize < size; dsize++) *dst++ = *src++;
return size;
}
for(i = 0; i < size; i++, src++) {
if(src[0] == 3 && i >= 2 && !src[-1] && !src[-2] && i < size-1 && src[1] < 4) {
dst[dsize++] = src[1];
src++;
i++;
} else
dst[dsize++] = *src;
}
return dsize;
}
/**
* Decode Simple/Main Profiles sequence header
* @see Figure 7-8, p16-17
* @param avctx Codec context
* @param gb GetBit context initialized from Codec context extra_data
* @return Status
*/
int vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb);
int vc1_decode_entry_point(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb);
int vc1_parse_frame_header (VC1Context *v, GetBitContext *gb);
int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext *gb);
#endif /* AVCODEC_VC1_H */
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