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- /*
- * 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
-
- 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
-
- typedef struct Predictor{
- double coeff;
- double count;
- double decay;
- } Predictor;
-
- 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_plus; /* h263 plus headers */
- int h263_rv10; /* use RV10 variation for H263 */
- int h263_pred; /* use mpeg4/h263 ac/dc predictions */
- int h263_msmpeg4; /* generate MSMPEG4 compatible stream */
- int h263_intel; /* use I263 intel h263 header */
- 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) */
- /* the following fields are managed internally by the encoder */
-
- /* bit output */
- PutBitContext pb;
-
- /* sequence parameters */
- int context_initialized;
- 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 mb_width, mb_height;
- 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 *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 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 */
- 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) */
- UINT8 *mbintra_table; /* used to kill a few memsets */
-
- int qscale;
- int pict_type;
- int last_non_b_pict_type; /* used for mpeg4 gmc b-frames */
- int last_pict_type; /* used for bit rate stuff (needs that to update the right predictor) */
- int frame_rate_index;
- /* motion compensation */
- int unrestricted_mv;
- int h263_long_vectors; /* use horrible h263v1 long vector mode */
-
- int f_code; /* resolution */
- int b_code; /* backward resolution for B Frames (mpeg4) */
- INT16 *mv_table[2]; /* MV table (1MV per MB)*/
- INT16 (*motion_val)[2]; /* used for MV prediction (4MV per MB)*/
- int full_search;
- 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];
- 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 estimation (MPEG4) */
-
- /* macroblock layer */
- int mb_x, mb_y;
- int mb_incr;
- int mb_intra;
- INT16 *mb_var; /* Table for MB variances */
- char *mb_type; /* Table for MB type */
-
- int block_index[6];
- int block_wrap[6];
-
- /* matrix transmitted in the bitstream */
- UINT16 intra_matrix[64];
- UINT16 chroma_intra_matrix[64];
- UINT16 non_intra_matrix[64];
- UINT16 chroma_non_intra_matrix[64];
- /* precomputed matrix (combine qscale and DCT renorm) */
- int q_intra_matrix[64];
- int q_non_intra_matrix[64];
- /* identical to the above but for MMX & these are not permutated */
- UINT16 __align8 q_intra_matrix16[64] ;
- UINT16 __align8 q_non_intra_matrix16[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; /* wanted number of bits per I frame */
- int P_frame_bits; /* same for P frame */
- int avg_mb_var; /* average MB variance for current frame */
- int mc_mb_var; /* motion compensated MB variance for current frame */
- int last_mc_mb_var; /* motion compensated MB variance for last frame */
- INT64 wanted_bits;
- INT64 total_bits;
- int frame_bits; /* bits used for the current frame */
- int last_frame_bits; /* bits used for the last frame */
- 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 */
-
- /* 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;
- int time_increment;
- int time_base;
- int time;
- int last_non_b_time[2];
- 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;
- int scalability;
- int new_pred;
- int reduced_res_vop;
- int aspect_ratio_info;
- int sprite_warping_accuracy;
- int low_latency_sprite;
- int data_partioning;
-
- /* divx specific, used to workaround (many) bugs in divx5 */
- int divx_version;
- int divx_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 ? */
-
- /* 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;
- int flipflop_rounding;
- int bitrate;
- /* 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[6][64] __align8;
- void (*dct_unquantize)(struct MpegEncContext *s,
- 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
-
- /* motion_est.c */
-
- int estimate_motion(MpegEncContext *s,
- int mb_x, int mb_y,
- int *mx_ptr, int *my_ptr);
-
- /* 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 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);
- void msmpeg4_dc_scale(MpegEncContext * s);
- 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);
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