RepoMirrors
/
ffmpeg
mirror of https://git.ffmpeg.org/ffmpeg.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
ffmpeg/libavcodec/mpegvideo.h

518 lines
20 KiB
C
Raw Blame History

/*
* Generic DCT based hybrid video encoder
* Copyright (c) 2000,2001 Gerard Lantau.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* Macros for picture code type. */
#define I_TYPE 1
#define P_TYPE 2
#define B_TYPE 3
#define S_TYPE 4 //S(GMC)-VOP MPEG4
#define FRAME_SKIPED 100 // return value for header parsers if frame is not coded
enum OutputFormat {
FMT_MPEG1,
FMT_H263,
FMT_MJPEG,
};
#define MPEG_BUF_SIZE (16 * 1024)
#define QMAT_SHIFT_MMX 19
#define QMAT_SHIFT 25
#define MAX_FCODE 7
#define MAX_MV 2048
#define REORDER_BUFFER_SIZE (FF_MAX_B_FRAMES+2)
typedef struct Predictor{
double coeff;
double count;
double decay;
} Predictor;
typedef struct RateControlEntry{
int pict_type;
int 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;
}RateControlEntry;
typedef struct RateControlContext{
FILE *stats_file;
int num_entries;
RateControlEntry *entry;
}RateControlContext;
typedef struct ReorderBuffer{
UINT8 *picture[3];
int pict_type;
int qscale;
int force_type;
int picture_number;
int picture_in_gop_number;
} ReorderBuffer;
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 frame_rate; /* number of frames per second */
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 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 qmin; /* min qscale */
int qmax; /* max qscale */
int max_qdiff; /* max qscale difference between frames */
int encoding; /* true if we are encoding (vs decoding) */
int flags; /* AVCodecContext.flags (HQ, MV4, ...) */
int force_input_type;/* 0= no force, otherwise I_TYPE, P_TYPE, ... */
int max_b_frames; /* max number of b-frames for encoding */
float b_quant_factor;/* qscale factor between ips and b frames */
int rc_strategy;
int b_frame_strategy;
/* the following fields are managed internally by the encoder */
/* bit output */
PutBitContext pb;
/* sequence parameters */
int context_initialized;
int input_picture_number;
int input_picture_in_gop_number; /* 0-> first pic in gop, ... */
int picture_number;
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 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_num; /* number of MBs of a picture */
int linesize; /* line size, in bytes, may be different from width */
UINT8 *new_picture[3]; /* picture to be compressed */
UINT8 *picture_buffer[REORDER_BUFFER_SIZE][3]; /* internal buffers used for reordering of input pictures */
int picture_buffer_index;
ReorderBuffer coded_order[REORDER_BUFFER_SIZE];
UINT8 *last_picture[3]; /* previous picture */
UINT8 *last_picture_base[3]; /* real start of the picture */
UINT8 *next_picture[3]; /* previous picture (for bidir pred) */
UINT8 *next_picture_base[3]; /* real start of the picture */
UINT8 *aux_picture[3]; /* aux picture (for B frames only) */
UINT8 *aux_picture_base[3]; /* real start of the picture */
UINT8 *current_picture[3]; /* buffer to store the decompressed current picture */
int num_available_buffers; /* is 0 at the start & after seeking, after the first I frame its 1 after next I/P 2 */
int last_dc[3]; /* last DC values for MPEG1 */
INT16 *dc_val[3]; /* used for mpeg4 DC prediction, all 3 arrays must be continuous */
int y_dc_scale, c_dc_scale;
UINT8 *coded_block; /* used for coded block pattern prediction (msmpeg4v3, wmv1)*/
INT16 (*ac_val[3])[16]; /* used for for mpeg4 AC prediction, all 3 arrays must be continuous */
int ac_pred;
int mb_skiped; /* MUST BE SET only during DECODING */
UINT8 *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 *mbintra_table; /* used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding */
int input_qscale; /* qscale prior to reordering of frames */
int input_pict_type; /* pict_type prior to reordering of frames */
int force_type; /* 0= no force, otherwise I_TYPE, P_TYPE, ... */
int qscale; /* QP */
int last_non_b_qscale; /* QP of last non b frame used for b frame qscale*/
int pict_type; /* I_TYPE, P_TYPE, B_TYPE, ... */
int last_non_b_pict_type; /* used for mpeg4 gmc b-frames & ratecontrol */
int frame_rate_index;
/* motion compensation */
int unrestricted_mv;
int h263_long_vectors; /* use horrible h263v1 long vector mode */
int f_code; /* forward MV resolution */
int b_code; /* backward MV resolution for B Frames (mpeg4) */
INT16 (*motion_val)[2]; /* used for MV prediction (4MV per MB) */
INT16 (*p_mv_table)[2]; /* MV table (1MV per MB) p-frame encoding */
INT16 (*last_p_mv_table)[2]; /* MV table (1MV per MB) p-frame encoding */
INT16 (*b_forw_mv_table)[2]; /* MV table (1MV per MB) forward mode b-frame encoding */
INT16 (*b_back_mv_table)[2]; /* MV table (1MV per MB) backward mode b-frame encoding */
INT16 (*b_bidir_forw_mv_table)[2]; /* MV table (1MV per MB) bidir mode b-frame encoding */
INT16 (*b_bidir_back_mv_table)[2]; /* MV table (1MV per MB) bidir mode b-frame encoding */
INT16 (*b_direct_forw_mv_table)[2];/* MV table (1MV per MB) direct mode b-frame encoding */
INT16 (*b_direct_back_mv_table)[2];/* MV table (1MV per MB) direct mode b-frame encoding */
INT16 (*b_direct_mv_table)[2]; /* MV table (1MV per MB) direct mode b-frame encoding */
int me_method; /* ME algorithm */
uint8_t *me_scratchpad; /* data area for the me algo, so that the ME doesnt need to malloc/free */
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 */
UINT16 (*mv_penalty)[MAX_MV*2+1]; /* amount of bits needed to encode a MV, used for ME */
UINT8 *fcode_tab; /* smallest fcode needed for each MV */
int has_b_frames;
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_incr;
int mb_intra;
UINT16 *mb_var; /* Table for MB variances */
UINT8 *mb_type; /* Table for 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_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];
/* matrix transmitted in the bitstream */
UINT16 intra_matrix[64];
UINT16 chroma_intra_matrix[64];
UINT16 inter_matrix[64];
UINT16 chroma_inter_matrix[64];
#define QUANT_BIAS_SHIFT 4
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 */
/* precomputed matrix (combine qscale and DCT renorm) */
int q_intra_matrix[32][64];
int q_inter_matrix[32][64];
/* identical to the above but for MMX & these are not permutated */
UINT16 __align8 q_intra_matrix16[32][64];
UINT16 __align8 q_inter_matrix16[32][64];
UINT16 __align8 q_intra_matrix16_bias[32][64];
UINT16 __align8 q_inter_matrix16_bias[32][64];
int block_last_index[6]; /* last non zero coefficient in block */
void *opaque; /* private data for the user */
/* bit rate control */
int I_frame_bits; //FIXME used in mpeg12 ...
int avg_mb_var; /* average MB variance for current frame */
int mc_mb_var; /* motion compensated MB variance for current frame */
int last_non_b_mc_mb_var;/* motion compensated MB variance for last non b frame */
INT64 wanted_bits;
INT64 total_bits;
int frame_bits; /* bits used for the current frame */
int pb_frame_bits; /* bits of the last b...bp group */
Predictor i_pred;
Predictor p_pred;
double qsum; /* sum of qscales */
double qcount; /* count of qscales */
double short_term_qsum; /* sum of recent qscales */
double short_term_qcount; /* count of recent qscales */
RateControlContext rc_context;
/* statistics, used for 2-pass encoding */
int mv_bits;
int header_bits;
int i_tex_bits;
int p_tex_bits;
int i_count;
int p_count;
int skip_count;
int misc_bits; // cbp, mb_type
int last_bits; //temp var used for calculating the above vars
/* H.263 specific */
int gob_number;
int gob_index;
int first_gob_line;
/* H.263+ specific */
int umvplus;
int umvplus_dec;
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 bp_time; /* time distance between the last b and p,s,i frame */
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];
int sprite_delta[2][2][2];
int sprite_shift[2][2];
int mcsel;
int quant_precision;
int quarter_sample; /* 1->qpel, 0->half pel ME/MC */
int scalability;
int new_pred;
int reduced_res_vop;
int aspect_ratio_info;
int sprite_warping_accuracy;
int low_latency_sprite;
int data_partioning;
int resync_marker;
int resync_x_pos;
int low_delay; /* no reordering needed / has no b-frames */
int vo_type;
/* divx specific, used to workaround (many) bugs in divx5 */
int divx_version;
int divx_build;
#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;
/* 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 ? */
/* 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 bitrate;
int msmpeg4_version; /* 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 */
/* decompression specific */
GetBitContext gb;
/* 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 mpeg2;
int full_pel[2];
int interlaced_dct;
int last_qscale;
int first_slice;
/* 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 *ptr_lastgob;
UINT8 *ptr_last_mb_line;
UINT32 mb_line_avgsize;
DCTELEM (*block)[64]; /* points to one of the following blocks */
DCTELEM blocks[2][6][64] __align8; // for HQ mode we need to keep the best block
void (*dct_unquantize_mpeg1)(struct MpegEncContext *s,
DCTELEM *block, int n, int qscale);
void (*dct_unquantize_mpeg2)(struct MpegEncContext *s,
DCTELEM *block, int n, int qscale);
void (*dct_unquantize_h263)(struct MpegEncContext *s,
DCTELEM *block, int n, int qscale);
void (*dct_unquantize)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
DCTELEM *block, int n, int qscale);
} MpegEncContext;
int MPV_common_init(MpegEncContext *s);
void MPV_common_end(MpegEncContext *s);
void MPV_decode_mb(MpegEncContext *s, DCTELEM block[6][64]);
void MPV_frame_start(MpegEncContext *s);
void MPV_frame_end(MpegEncContext *s);
#ifdef HAVE_MMX
void MPV_common_init_mmx(MpegEncContext *s);
#endif
int (*dct_quantize)(MpegEncContext *s, DCTELEM *block, int n, int qscale, int *overflow);
void (*draw_edges)(UINT8 *buf, int wrap, int width, int height, int w);
/* 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);
/* mpeg12.c */
extern INT16 default_intra_matrix[64];
extern INT16 default_non_intra_matrix[64];
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 mpeg1_encode_init(MpegEncContext *s);
/* h263enc.c */
/* run length table */
#define MAX_RUN 64
#define MAX_LEVEL 64
typedef struct RLTable {
int n; /* number of entries of table_vlc minus 1 */
int last; /* number of values for last = 0 */
const UINT16 (*table_vlc)[2];
const INT8 *table_run;
const INT8 *table_level;
UINT8 *index_run[2]; /* encoding only */
INT8 *max_level[2]; /* encoding & decoding */
INT8 *max_run[2]; /* encoding & decoding */
VLC vlc; /* 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;
}
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);
int h263_encode_gob_header(MpegEncContext * s, int mb_line);
void h263_dc_scale(MpegEncContext *s);
INT16 *h263_pred_motion(MpegEncContext * s, int block,
int *px, int *py);
void mpeg4_pred_ac(MpegEncContext * s, INT16 *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 h263_decode_gob_header(MpegEncContext *s);
int mpeg4_decode_picture_header(MpegEncContext * s);
int intel_h263_decode_picture_header(MpegEncContext *s);
int h263_decode_mb(MpegEncContext *s,
DCTELEM block[6][64]);
int h263_get_picture_format(int width, int height);
/* 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 msmpeg4_decode_mb(MpegEncContext *s,
DCTELEM block[6][64]);
int msmpeg4_decode_init_vlc(MpegEncContext *s);
/* mjpegenc.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);
int ff_rate_estimate_qscale(MpegEncContext *s);
int ff_rate_estimate_qscale_pass2(MpegEncContext *s);
void ff_write_pass1_stats(MpegEncContext *s);
void ff_rate_control_uninit(MpegEncContext *s);
Reference in New Issue View Git Blame Copy Permalink