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FFmpeg/libavcodec/mpegvideo.h

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/*
* Generic DCT based hybrid video encoder
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/**
* @file mpegvideo.h
* mpegvideo header.
*/
#ifndef AVCODEC_MPEGVIDEO_H
#define AVCODEC_MPEGVIDEO_H
#include "dsputil.h"
#define FRAME_SKIPED 100 ///< return value for header parsers if frame is not coded
enum OutputFormat {
FMT_MPEG1,
FMT_H263,
FMT_MJPEG,
FMT_H264,
};
#define EDGE_WIDTH 16
#define MPEG_BUF_SIZE (16 * 1024)
#define QMAT_SHIFT_MMX 16
#define QMAT_SHIFT 22
#define MAX_FCODE 7
#define MAX_MV 2048
#define MAX_PICTURE_COUNT 15
#define ME_MAP_SIZE 64
#define ME_MAP_SHIFT 3
#define ME_MAP_MV_BITS 11
/* run length table */
#define MAX_RUN 64
#define MAX_LEVEL 64
#define I_TYPE FF_I_TYPE ///< Intra
#define P_TYPE FF_P_TYPE ///< Predicted
#define B_TYPE FF_B_TYPE ///< Bi-dir predicted
#define S_TYPE FF_S_TYPE ///< S(GMC)-VOP MPEG4
#define SI_TYPE FF_SI_TYPE ///< Switching Intra
#define SP_TYPE FF_SP_TYPE ///< Switching Predicted
typedef struct Predictor{
double coeff;
double count;
double decay;
} Predictor;
typedef struct RateControlEntry{
int pict_type;
float qscale;
int mv_bits;
int i_tex_bits;
int p_tex_bits;
int misc_bits;
uint64_t expected_bits;
int new_pict_type;
float new_qscale;
int mc_mb_var_sum;
int mb_var_sum;
int i_count;
int f_code;
int b_code;
}RateControlEntry;
/**
* rate control context.
*/
typedef struct RateControlContext{
FILE *stats_file;
int num_entries; ///< number of RateControlEntries
RateControlEntry *entry;
int buffer_index; ///< amount of bits in the video/audio buffer
Predictor pred[5];
double short_term_qsum; ///< sum of recent qscales
double short_term_qcount; ///< count of recent qscales
double pass1_rc_eq_output_sum;///< sum of the output of the rc equation, this is used for normalization
double pass1_wanted_bits; ///< bits which should have been outputed by the pass1 code (including complexity init)
double last_qscale;
double last_qscale_for[5]; ///< last qscale for a specific pict type, used for max_diff & ipb factor stuff
int last_mc_mb_var_sum;
int last_mb_var_sum;
uint64_t i_cplx_sum[5];
uint64_t p_cplx_sum[5];
uint64_t mv_bits_sum[5];
uint64_t qscale_sum[5];
int frame_count[5];
int last_non_b_pict_type;
}RateControlContext;
/**
* Scantable.
*/
typedef struct ScanTable{
const uint8_t *scantable;
uint8_t permutated[64];
uint8_t raster_end[64];
#ifdef ARCH_POWERPC
/** Used by dct_quantise_alitvec to find last-non-zero */
uint8_t __align8 inverse[64];
#endif
} ScanTable;
/**
* Picture.
*/
typedef struct Picture{
FF_COMMON_FRAME
/**
* halfpel luma planes.
*/
uint8_t *interpolated[3];
int16_t (*motion_val[2])[2];
int8_t *ref_index[2];
uint32_t *mb_type_base;
uint32_t *mb_type; ///< mb_type_base + mb_width + 2, note: only used for decoding currently
#define MB_TYPE_INTRA4x4 0x0001
#define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
#define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
#define MB_TYPE_16x16 0x0008
#define MB_TYPE_16x8 0x0010
#define MB_TYPE_8x16 0x0020
#define MB_TYPE_8x8 0x0040
#define MB_TYPE_INTERLACED 0x0080
#define MB_TYPE_DIRECT2 0x0100 //FIXME
#define MB_TYPE_ACPRED 0x0200
#define MB_TYPE_GMC 0x0400 //FIXME mpeg4 specific
#define MB_TYPE_SKIP 0x0800
#define MB_TYPE_P0L0 0x1000
#define MB_TYPE_P1L0 0x2000
#define MB_TYPE_P0L1 0x4000
#define MB_TYPE_P1L1 0x8000
#define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
#define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
#define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
#define MB_TYPE_QUANT 0x00010000
//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 pat, ...)
#define IS_INTRA4x4(a) ((a)&MB_TYPE_INTRA4x4)
#define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
#define IS_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
#define IS_INTRA(a) ((a)&7)
#define IS_INTER(a) ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
#define IS_SKIP(a) ((a)&MB_TYPE_SKIP)
#define IS_INTRA_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
#define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
#define IS_DIRECT(a) ((a)&MB_TYPE_DIRECT2)
#define IS_GMC(a) ((a)&MB_TYPE_GMC)
#define IS_16X16(a) ((a)&MB_TYPE_16x16)
#define IS_16X8(a) ((a)&MB_TYPE_16x8)
#define IS_8X16(a) ((a)&MB_TYPE_8x16)
#define IS_8X8(a) ((a)&MB_TYPE_8x8)
#define IS_SUB_8X8(a) ((a)&MB_TYPE_16x16) //note reused
#define IS_SUB_8X4(a) ((a)&MB_TYPE_16x8) //note reused
#define IS_SUB_4X8(a) ((a)&MB_TYPE_8x16) //note reused
#define IS_SUB_4X4(a) ((a)&MB_TYPE_8x8) //note reused
#define IS_ACPRED(a) ((a)&MB_TYPE_ACPRED)
#define IS_QUANT(a) ((a)&MB_TYPE_QUANT)
#define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
#define USES_LIST(a, list) ((a) & ((MB_TYPE_P0L0|MB_TYPE_P1L0)<<(2*(list)))) ///< does this mb use listX, note doesnt work if subMBs
int field_poc[2]; ///< h264 top/bottom POC
int poc; ///< h264 frame POC
int frame_num; ///< h264 frame_num
int pic_id; ///< h264 pic_num or long_term_pic_idx
int long_ref; ///< 1->long term reference 0->short term reference
int mb_var_sum; ///< sum of MB variance for current frame
int mc_mb_var_sum; ///< motion compensated MB variance for current frame
uint16_t *mb_var; ///< Table for MB variances
uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
uint8_t *mb_mean; ///< Table for MB luminance
int32_t *mb_cmp_score; ///< Table for MB cmp scores, for mb decission
int b_frame_score; /* */
} Picture;
typedef struct ParseContext{
uint8_t *buffer;
int index;
int last_index;
int buffer_size;
uint32_t state; ///< contains the last few bytes in MSB order
int frame_start_found;
int overread; ///< the number of bytes which where irreversibly read from the next frame
int overread_index; ///< the index into ParseContext.buffer of the overreaded bytes
} ParseContext;
struct MpegEncContext;
/**
* Motion estimation context.
*/
typedef struct MotionEstContext{
int skip; ///< set if ME is skiped for the current MB
int co_located_mv[4][2]; ///< mv from last p frame for direct mode ME
int direct_basis_mv[4][2];
uint8_t *scratchpad; ///< data area for the me algo, so that the ME doesnt need to malloc/free
uint32_t *map; ///< map to avoid duplicate evaluations
uint32_t *score_map; ///< map to store the scores
int map_generation;
int pre_penalty_factor;
int penalty_factor;
int sub_penalty_factor;
int mb_penalty_factor;
int pre_pass; ///< = 1 for the pre pass
int dia_size;
uint8_t (*mv_penalty)[MAX_MV*2+1]; ///< amount of bits needed to encode a MV
int (*sub_motion_search)(struct MpegEncContext * s,
int *mx_ptr, int *my_ptr, int dmin,
int xmin, int ymin, int xmax, int ymax,
int pred_x, int pred_y, Picture *ref_picture,
int n, int size, uint8_t * const mv_penalty);
int (*motion_search[7])(struct MpegEncContext * s, int block,
int *mx_ptr, int *my_ptr,
int P[10][2], int pred_x, int pred_y,
int xmin, int ymin, int xmax, int ymax, Picture *ref_picture, int16_t (*last_mv)[2],
int ref_mv_scale, uint8_t * const mv_penalty);
int (*pre_motion_search)(struct MpegEncContext * s, int block,
int *mx_ptr, int *my_ptr,
int P[10][2], int pred_x, int pred_y,
int xmin, int ymin, int xmax, int ymax, Picture *ref_picture, int16_t (*last_mv)[2],
int ref_mv_scale, uint8_t * const mv_penalty);
int (*get_mb_score)(struct MpegEncContext * s, int mx, int my, int pred_x, int pred_y, Picture *ref_picture,
uint8_t * const mv_penalty);
}MotionEstContext;
/**
* MpegEncContext.
*/
typedef struct MpegEncContext {
struct AVCodecContext *avctx;
/* the following parameters must be initialized before encoding */
int width, height;///< picture size. must be a multiple of 16
int gop_size;
int intra_only; ///< if true, only intra pictures are generated
int bit_rate; ///< wanted bit rate
int bit_rate_tolerance; ///< amount of +- bits (>0)
enum OutputFormat out_format; ///< output format
int h263_pred; ///< use mpeg4/h263 ac/dc predictions
/* the following codec id fields are deprecated in favor of codec_id */
int h263_plus; ///< h263 plus headers
int h263_rv10; ///< use RV10 variation for H263
int h263_msmpeg4; ///< generate MSMPEG4 compatible stream (deprecated, use msmpeg4_version instead)
int h263_intel; ///< use I263 intel h263 header
int h263_flv; ///< use flv h263 header
int codec_id; /* see CODEC_ID_xxx */
int fixed_qscale; ///< fixed qscale if non zero
float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
int max_qdiff; ///< max qscale difference between frames
int encoding; ///< true if we are encoding (vs decoding)
int flags; ///< AVCodecContext.flags (HQ, MV4, ...)
int max_b_frames; ///< max number of b-frames for encoding
int b_frame_strategy;
int luma_elim_threshold;
int chroma_elim_threshold;
int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
/* the following fields are managed internally by the encoder */
/** bit output */
PutBitContext pb;
/* sequence parameters */
int context_initialized;
int input_picture_number;
int picture_number;
int picture_in_gop_number; ///< 0-> first pic in gop, ...
int b_frames_since_non_b; ///< used for encoding, relative to not yet reordered input
int mb_width, mb_height; ///< number of MBs horizontally & vertically
int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressng of left & top MBs withoutt sig11
int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replicateion)
int mb_num; ///< number of MBs of a picture
int linesize; ///< line size, in bytes, may be different from width
int uvlinesize; ///< line size, for chroma in bytes, may be different from width
Picture *picture; ///< main picture buffer
Picture **input_picture; ///< next pictures on display order for encoding
Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
/**
* copy of the previous picture structure.
* note, linesize & data, might not match the previous picture (for field pictures)
*/
Picture last_picture;
/**
* copy of the next picture structure.
* note, linesize & data, might not match the next picture (for field pictures)
*/
Picture next_picture;
/**
* copy of the source picture structure for encoding.
* note, linesize & data, might not match the source picture (for field pictures)
*/
Picture new_picture;
/**
* copy of the current picture structure.
* note, linesize & data, might not match the current picture (for field pictures)
*/
Picture current_picture; ///< buffer to store the decompressed current picture
Picture *last_picture_ptr; ///< pointer to the previous picture.
Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred)
Picture *current_picture_ptr; ///< pointer to the current picture
int last_dc[3]; ///< last DC values for MPEG1
int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
int16_t dc_cache[4*5];
int y_dc_scale, c_dc_scale;
uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
int16_t (*ac_val[3])[16]; ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
int ac_pred;
uint8_t *prev_pict_types; ///< previous picture types in bitstream order, used for mb skip
#define PREV_PICT_TYPES_BUFFER_SIZE 256
int mb_skiped; ///< MUST BE SET only during DECODING
uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
and used for b-frame encoding & decoding (contains skip table of next P Frame) */
uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
uint8_t *allocated_edge_emu_buffer;
uint8_t *edge_emu_buffer; ///< points into the middle of allocated_edge_emu_buffer
int qscale; ///< QP
int lambda; ///< lagrange multipler used in rate distortion
int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
int *lambda_table;
int adaptive_quant; ///< use adaptive quantization
int dquant; ///< qscale difference to prev qscale
int pict_type; ///< I_TYPE, P_TYPE, B_TYPE, ...
int last_pict_type;
int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol
int frame_rate_index;
/* motion compensation */
int unrestricted_mv; ///< mv can point outside of the coded picture
int h263_long_vectors; ///< use horrible h263v1 long vector mode
int decode; ///< if 0 then decoding will be skiped (for encoding b frames for example)
DSPContext dsp; ///< pointers for accelerated dsp fucntions
int f_code; ///< forward MV resolution
int b_code; ///< backward MV resolution for B Frames (mpeg4)
int16_t (*motion_val)[2];
int16_t (*p_mv_table_base)[2];
int16_t (*b_forw_mv_table_base)[2];
int16_t (*b_back_mv_table_base)[2];
int16_t (*b_bidir_forw_mv_table_base)[2];
int16_t (*b_bidir_back_mv_table_base)[2];
int16_t (*b_direct_mv_table_base)[2];
int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) p-frame encoding
int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode b-frame encoding
int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode b-frame encoding
int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode b-frame encoding
int me_method; ///< ME algorithm
int scene_change_score;
int mv_dir;
#define MV_DIR_BACKWARD 1
#define MV_DIR_FORWARD 2
#define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
int mv_type;
#define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
#define MV_TYPE_8X8 1 ///< 4 vectors (h263, mpeg4 4MV)
#define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
#define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
#define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
/**motion vectors for a macroblock
first coordinate : 0 = forward 1 = backward
second " : depend on type
third " : 0 = x, 1 = y
*/
int mv[2][4][2];
int field_select[2][2];
int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
uint8_t *fcode_tab; ///< smallest fcode needed for each MV
MotionEstContext me;
int no_rounding; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
for b-frames rounding mode is allways 0 */
int hurry_up; /**< when set to 1 during decoding, b frames will be skiped
when set to 2 idct/dequant will be skipped too */
/* macroblock layer */
int mb_x, mb_y;
int mb_skip_run;
int mb_intra;
uint8_t *mb_type; ///< Table for MB type FIXME remove and use picture->mb_type
#define MB_TYPE_INTRA 0x01
#define MB_TYPE_INTER 0x02
#define MB_TYPE_INTER4V 0x04
#define MB_TYPE_SKIPED 0x08
//#define MB_TYPE_GMC 0x10
#define MB_TYPE_DIRECT 0x10
#define MB_TYPE_FORWARD 0x20
#define MB_TYPE_BACKWARD 0x40
#define MB_TYPE_BIDIR 0x80
int block_index[6]; ///< index to current MB in block based arrays with edges
int block_wrap[6];
uint8_t *dest[3];
int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
/** matrix transmitted in the bitstream */
uint16_t intra_matrix[64];
uint16_t chroma_intra_matrix[64];
uint16_t inter_matrix[64];
uint16_t chroma_inter_matrix[64];
#define QUANT_BIAS_SHIFT 8
int intra_quant_bias; ///< bias for the quantizer
int inter_quant_bias; ///< bias for the quantizer
int min_qcoeff; ///< minimum encodable coefficient
int max_qcoeff; ///< maximum encodable coefficient
int ac_esc_length; ///< num of bits needed to encode the longest esc
uint8_t *intra_ac_vlc_length;
uint8_t *intra_ac_vlc_last_length;
uint8_t *inter_ac_vlc_length;
uint8_t *inter_ac_vlc_last_length;
uint8_t *luma_dc_vlc_length;
uint8_t *chroma_dc_vlc_length;
#define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
int coded_score[6];
/** precomputed matrix (combine qscale and DCT renorm) */
int (*q_intra_matrix)[64];
int (*q_inter_matrix)[64];
/** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
uint16_t (*q_intra_matrix16)[2][64];
uint16_t (*q_inter_matrix16)[2][64];
int block_last_index[6]; ///< last non zero coefficient in block
/* scantables */
ScanTable __align8 intra_scantable;
ScanTable intra_h_scantable;
ScanTable intra_v_scantable;
ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
void *opaque; ///< private data for the user
/* bit rate control */
int I_frame_bits; //FIXME used in mpeg12 ...
int64_t wanted_bits;
int64_t total_bits;
int frame_bits; ///< bits used for the current frame
RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
/* statistics, used for 2-pass encoding */
int mv_bits;
int header_bits;
int i_tex_bits;
int p_tex_bits;
int i_count;
int f_count;
int b_count;
int skip_count;
int misc_bits; ///< cbp, mb_type
int last_bits; ///< temp var used for calculating the above vars
/* error concealment / resync */
int error_count;
uint8_t *error_status_table; ///< table of the error status of each MB
#define VP_START 1 ///< current MB is the first after a resync marker
#define AC_ERROR 2
#define DC_ERROR 4
#define MV_ERROR 8
#define AC_END 16
#define DC_END 32
#define MV_END 64
//FIXME some prefix?
int resync_mb_x; ///< x position of last resync marker
int resync_mb_y; ///< y position of last resync marker
GetBitContext last_resync_gb; ///< used to search for the next resync marker
int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed b frames
int error_resilience;
ParseContext parse_context;
/* H.263 specific */
int gob_number;
int gob_index;
/* H.263+ specific */
int umvplus; ///< == H263+ && unrestricted_mv
int h263_aic; ///< Advanded INTRA Coding (AIC)
int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
/* mpeg4 specific */
int time_increment_resolution;
int time_increment_bits; ///< number of bits to represent the fractional part of time
int last_time_base;
int time_base; ///< time in seconds of last I,P,S Frame
int64_t time; ///< time of current frame
int64_t last_non_b_time;
uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
uint16_t pb_time; ///< time distance between the last b and p,s,i frame
uint16_t pp_field_time;
uint16_t pb_field_time; ///< like above, just for interlaced
int shape;
int vol_sprite_usage;
int sprite_width;
int sprite_height;
int sprite_left;
int sprite_top;
int sprite_brightness_change;
int num_sprite_warping_points;
int real_sprite_warping_points;
int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
int sprite_shift[2]; ///< sprite shift [isChroma]
int mcsel;
int quant_precision;
int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
int scalability;
int hierachy_type;
int enhancement_type;
int new_pred;
int reduced_res_vop;
int aspect_ratio_info; //FIXME remove
int sprite_warping_accuracy;
int low_latency_sprite;
int data_partitioning; ///< data partitioning flag from header
int partitioned_frame; ///< is current frame partitioned
int rvlc; ///< reversible vlc
int resync_marker; ///< could this stream contain resync markers
int low_delay; ///< no reordering needed / has no b-frames
int vo_type;
int vol_control_parameters; ///< does the stream contain the low_delay flag, used to workaround buggy encoders
int intra_dc_threshold; ///< QP above whch the ac VLC should be used for intra dc
PutBitContext tex_pb; ///< used for data partitioned VOPs
PutBitContext pb2; ///< used for data partitioned VOPs
#define PB_BUFFER_SIZE 1024*256
uint8_t *tex_pb_buffer;
uint8_t *pb2_buffer;
int mpeg_quant;
int16_t (*field_mv_table)[2][2]; ///< used for interlaced b frame decoding
int8_t (*field_select_table)[2]; ///< wtf, no really another table for interlaced b frames
int t_frame; ///< time distance of first I -> B, used for interlaced b frames
int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4
/* divx specific, used to workaround (many) bugs in divx5 */
int divx_version;
int divx_build;
int divx_packed;
#define BITSTREAM_BUFFER_SIZE 1024*256
uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
int bitstream_buffer_size;
int xvid_build;
/* lavc specific stuff, used to workaround bugs in libavcodec */
int ffmpeg_version;
int lavc_build;
/* RV10 specific */
int rv10_version; ///< RV10 version: 0 or 3
int rv10_first_dc_coded[3];
/* MJPEG specific */
struct MJpegContext *mjpeg_ctx;
int mjpeg_vsample[3]; ///< vertical sampling factors, default = {2, 1, 1}
int mjpeg_hsample[3]; ///< horizontal sampling factors, default = {2, 1, 1}
int mjpeg_write_tables; ///< do we want to have quantisation- and huffmantables in the jpeg file ?
int mjpeg_data_only_frames; ///< frames only with SOI, SOS and EOI markers
/* MSMPEG4 specific */
int mv_table_index;
int rl_table_index;
int rl_chroma_table_index;
int dc_table_index;
int use_skip_mb_code;
int slice_height; ///< in macroblocks
int first_slice_line; ///< used in mpeg4 too to handle resync markers
int flipflop_rounding;
int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
int per_mb_rl_table;
int esc3_level_length;
int esc3_run_length;
/** [mb_intra][isChroma][level][run][last] */
int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
int inter_intra_pred;
int mspel;
/* decompression specific */
GetBitContext gb;
/* Mpeg1 specific */
int fake_picture_number; ///< picture number at the bitstream frame rate
int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
int last_mv_dir; ///< last mv_dir, used for b frame encoding
int broken_link; ///< no_output_of_prior_pics_flag
/* MPEG2 specific - I wish I had not to support this mess. */
int progressive_sequence;
int mpeg_f_code[2][2];
int picture_structure;
/* picture type */
#define PICT_TOP_FIELD 1
#define PICT_BOTTOM_FIELD 2
#define PICT_FRAME 3
int intra_dc_precision;
int frame_pred_frame_dct;
int top_field_first;
int concealment_motion_vectors;
int q_scale_type;
int intra_vlc_format;
int alternate_scan;
int repeat_first_field;
int chroma_420_type;
int progressive_frame;
int full_pel[2];
int interlaced_dct;
int first_slice;
int first_field; ///< is 1 for the first field of a field picture 0 otherwise
/* RTP specific */
/* These are explained on avcodec.h */
int rtp_mode;
int rtp_payload_size;
void (*rtp_callback)(void *data, int size, int packet_number);
uint8_t *ptr_lastgob;
DCTELEM (*block)[64]; ///< points to one of the following blocks
DCTELEM (*blocks)[6][64]; // for HQ mode we need to keep the best block
int (*decode_mb)(struct MpegEncContext *s, DCTELEM block[6][64]); // used by some codecs to avoid a switch()
#define SLICE_OK 0
#define SLICE_ERROR -1
#define SLICE_END -2 ///<end marker found
#define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
void (*dct_unquantize_mpeg1)(struct MpegEncContext *s,
DCTELEM *block/*align 16*/, int n, int qscale);
void (*dct_unquantize_mpeg2)(struct MpegEncContext *s,
DCTELEM *block/*align 16*/, int n, int qscale);
void (*dct_unquantize_h263)(struct MpegEncContext *s,
DCTELEM *block/*align 16*/, int n, int qscale);
void (*dct_unquantize)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
DCTELEM *block/*align 16*/, int n, int qscale);
int (*dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
int (*fast_dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
} MpegEncContext;
int DCT_common_init(MpegEncContext *s);
int MPV_common_init(MpegEncContext *s);
void MPV_common_end(MpegEncContext *s);
void MPV_decode_mb(MpegEncContext *s, DCTELEM block[6][64]);
int MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
void MPV_frame_end(MpegEncContext *s);
int MPV_encode_init(AVCodecContext *avctx);
int MPV_encode_end(AVCodecContext *avctx);
int MPV_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data);
#ifdef HAVE_MMX
void MPV_common_init_mmx(MpegEncContext *s);
#endif
#ifdef ARCH_ALPHA
void MPV_common_init_axp(MpegEncContext *s);
#endif
#ifdef HAVE_MLIB
void MPV_common_init_mlib(MpegEncContext *s);
#endif
#ifdef HAVE_MMI
void MPV_common_init_mmi(MpegEncContext *s);
#endif
#ifdef ARCH_ARMV4L
void MPV_common_init_armv4l(MpegEncContext *s);
#endif
#ifdef ARCH_POWERPC
void MPV_common_init_ppc(MpegEncContext *s);
#endif
extern void (*draw_edges)(uint8_t *buf, int wrap, int width, int height, int w);
void ff_copy_bits(PutBitContext *pb, uint8_t *src, int length);
void ff_clean_intra_table_entries(MpegEncContext *s);
void ff_init_scantable(uint8_t *, ScanTable *st, const uint8_t *src_scantable);
void ff_draw_horiz_band(MpegEncContext *s, int y, int h);
void ff_emulated_edge_mc(uint8_t *buf, uint8_t *src, int linesize, int block_w, int block_h,
int src_x, int src_y, int w, int h);
#define END_NOT_FOUND -100
int ff_combine_frame( MpegEncContext *s, int next, uint8_t **buf, int *buf_size);
void ff_mpeg_flush(AVCodecContext *avctx);
void ff_print_debug_info(MpegEncContext *s, Picture *pict);
void ff_write_quant_matrix(PutBitContext *pb, int16_t *matrix);
void ff_er_frame_start(MpegEncContext *s);
void ff_er_frame_end(MpegEncContext *s);
void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status);
extern enum PixelFormat ff_yuv420p_list[2];
void ff_init_block_index(MpegEncContext *s);
static inline void ff_update_block_index(MpegEncContext *s){
s->block_index[0]+=2;
s->block_index[1]+=2;
s->block_index[2]+=2;
s->block_index[3]+=2;
s->block_index[4]++;
s->block_index[5]++;
s->dest[0]+= 16;
s->dest[1]+= 8;
s->dest[2]+= 8;
}
static inline int get_bits_diff(MpegEncContext *s){
const int bits= get_bit_count(&s->pb);
const int last= s->last_bits;
s->last_bits = bits;
return bits - last;
}
/* motion_est.c */
void ff_estimate_p_frame_motion(MpegEncContext * s,
int mb_x, int mb_y);
void ff_estimate_b_frame_motion(MpegEncContext * s,
int mb_x, int mb_y);
int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
void ff_fix_long_p_mvs(MpegEncContext * s);
void ff_fix_long_b_mvs(MpegEncContext * s, int16_t (*mv_table)[2], int f_code, int type);
void ff_init_me(MpegEncContext *s);
int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
/* mpeg12.c */
extern const int16_t ff_mpeg1_default_intra_matrix[64];
extern const int16_t ff_mpeg1_default_non_intra_matrix[64];
extern uint8_t ff_mpeg1_dc_scale_table[128];
void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
void mpeg1_encode_mb(MpegEncContext *s,
DCTELEM block[6][64],
int motion_x, int motion_y);
void ff_mpeg1_encode_init(MpegEncContext *s);
void ff_mpeg1_encode_slice_header(MpegEncContext *s);
void ff_mpeg1_clean_buffers(MpegEncContext *s);
/** RLTable. */
typedef struct RLTable {
int n; ///< number of entries of table_vlc minus 1
int last; ///< number of values for last = 0
const uint16_t (*table_vlc)[2];
const int8_t *table_run;
const int8_t *table_level;
uint8_t *index_run[2]; ///< encoding only
int8_t *max_level[2]; ///< encoding & decoding
int8_t *max_run[2]; ///< encoding & decoding
VLC vlc; ///< decoding only deprected FIXME remove
RL_VLC_ELEM *rl_vlc[32]; ///< decoding only
} RLTable;
void init_rl(RLTable *rl);
void init_vlc_rl(RLTable *rl);
static inline int get_rl_index(const RLTable *rl, int last, int run, int level)
{
int index;
index = rl->index_run[last][run];
if (index >= rl->n)
return rl->n;
if (level > rl->max_level[last][run])
return rl->n;
return index + level - 1;
}
extern uint8_t ff_mpeg4_y_dc_scale_table[32];
extern uint8_t ff_mpeg4_c_dc_scale_table[32];
extern const int16_t ff_mpeg4_default_intra_matrix[64];
extern const int16_t ff_mpeg4_default_non_intra_matrix[64];
int ff_h263_decode_init(AVCodecContext *avctx);
int ff_h263_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
uint8_t *buf, int buf_size);
int ff_h263_decode_end(AVCodecContext *avctx);
void h263_encode_mb(MpegEncContext *s,
DCTELEM block[6][64],
int motion_x, int motion_y);
void mpeg4_encode_mb(MpegEncContext *s,
DCTELEM block[6][64],
int motion_x, int motion_y);
void h263_encode_picture_header(MpegEncContext *s, int picture_number);
void ff_flv_encode_picture_header(MpegEncContext *s, int picture_number);
int h263_encode_gob_header(MpegEncContext * s, int mb_line);
int16_t *h263_pred_motion(MpegEncContext * s, int block,
int *px, int *py);
void mpeg4_pred_ac(MpegEncContext * s, DCTELEM *block, int n,
int dir);
void ff_set_mpeg4_time(MpegEncContext * s, int picture_number);
void mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);
void h263_encode_init(MpegEncContext *s);
void h263_decode_init_vlc(MpegEncContext *s);
int h263_decode_picture_header(MpegEncContext *s);
int ff_h263_decode_gob_header(MpegEncContext *s);
int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb);
void ff_h263_update_motion_val(MpegEncContext * s);
int intel_h263_decode_picture_header(MpegEncContext *s);
int flv_h263_decode_picture_header(MpegEncContext *s);
int ff_h263_decode_mb(MpegEncContext *s,
DCTELEM block[6][64]);
int h263_get_picture_format(int width, int height);
void ff_mpeg4_encode_video_packet_header(MpegEncContext *s);
void ff_mpeg4_clean_buffers(MpegEncContext *s);
void ff_mpeg4_stuffing(PutBitContext * pbc);
void ff_mpeg4_init_partitions(MpegEncContext *s);
void ff_mpeg4_merge_partitions(MpegEncContext *s);
void ff_clean_mpeg4_qscales(MpegEncContext *s);
void ff_clean_h263_qscales(MpegEncContext *s);
int ff_mpeg4_decode_partitions(MpegEncContext *s);
int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s);
int ff_h263_resync(MpegEncContext *s);
int ff_h263_get_gob_height(MpegEncContext *s);
int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my);
inline int ff_h263_round_chroma(int x);
/* rv10.c */
void rv10_encode_picture_header(MpegEncContext *s, int picture_number);
int rv_decode_dc(MpegEncContext *s, int n);
/* msmpeg4.c */
void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
void msmpeg4_encode_ext_header(MpegEncContext * s);
void msmpeg4_encode_mb(MpegEncContext * s,
DCTELEM block[6][64],
int motion_x, int motion_y);
int msmpeg4_decode_picture_header(MpegEncContext * s);
int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
int ff_msmpeg4_decode_init(MpegEncContext *s);
void ff_msmpeg4_encode_init(MpegEncContext *s);
int ff_wmv2_decode_picture_header(MpegEncContext * s);
int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
void ff_mspel_motion(MpegEncContext *s,
uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
int motion_x, int motion_y, int h);
int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
void ff_wmv2_encode_mb(MpegEncContext * s,
DCTELEM block[6][64],
int motion_x, int motion_y);
/* mjpeg.c */
int mjpeg_init(MpegEncContext *s);
void mjpeg_close(MpegEncContext *s);
void mjpeg_encode_mb(MpegEncContext *s,
DCTELEM block[6][64]);
void mjpeg_picture_header(MpegEncContext *s);
void mjpeg_picture_trailer(MpegEncContext *s);
/* rate control */
int ff_rate_control_init(MpegEncContext *s);
float ff_rate_estimate_qscale(MpegEncContext *s);
void ff_write_pass1_stats(MpegEncContext *s);
void ff_rate_control_uninit(MpegEncContext *s);
double ff_eval(char *s, double *const_value, const char **const_name,
double (**func1)(void *, double), const char **func1_name,
double (**func2)(void *, double, double), char **func2_name,
void *opaque);
#endif /* AVCODEC_MPEGVIDEO_H */