Statistics
| Branch: | Revision:

ffmpeg / libavcodec / mpegvideo.h @ 174489bd

History | View | Annotate | Download (14.2 KB)

1
/*
2
 * Generic DCT based hybrid video encoder
3
 * Copyright (c) 2000,2001 Gerard Lantau.
4
 *
5
 * This program is free software; you can redistribute it and/or modify
6
 * it under the terms of the GNU General Public License as published by
7
 * the Free Software Foundation; either version 2 of the License, or
8
 * (at your option) any later version.
9
 *
10
 * This program is distributed in the hope that it will be useful,
11
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13
 * GNU General Public License for more details.
14
 *
15
 * You should have received a copy of the GNU General Public License
16
 * along with this program; if not, write to the Free Software
17
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18
 */
19

    
20
/* Macros for picture code type. */
21
#define I_TYPE 1
22
#define P_TYPE 2
23
#define B_TYPE 3
24
#define S_TYPE 4 //S(GMC)-VOP MPEG4
25

    
26
enum OutputFormat {
27
    FMT_MPEG1,
28
    FMT_H263,
29
    FMT_MJPEG,
30
};
31

    
32
#define MPEG_BUF_SIZE (16 * 1024)
33

    
34
#define QMAT_SHIFT_MMX 19
35
#define QMAT_SHIFT 25
36

    
37
#define MAX_FCODE 7
38
#define MAX_MV 2048
39

    
40
typedef struct Predictor{
41
    double coeff;
42
    double count;
43
    double decay;
44
} Predictor;
45

    
46
typedef struct MpegEncContext {
47
    struct AVCodecContext *avctx;
48
    /* the following parameters must be initialized before encoding */
49
    int width, height; /* picture size. must be a multiple of 16 */
50
    int gop_size;
51
    int frame_rate; /* number of frames per second */
52
    int intra_only; /* if true, only intra pictures are generated */
53
    int bit_rate;        /* wanted bit rate */
54
    int bit_rate_tolerance; /* amount of +- bits (>0)*/
55
    enum OutputFormat out_format; /* output format */
56
    int h263_plus; /* h263 plus headers */
57
    int h263_rv10; /* use RV10 variation for H263 */
58
    int h263_pred; /* use mpeg4/h263 ac/dc predictions */
59
    int h263_msmpeg4; /* generate MSMPEG4 compatible stream */
60
    int h263_intel; /* use I263 intel h263 header */
61
    int fixed_qscale; /* fixed qscale if non zero */
62
    float qcompress;  /* amount of qscale change between easy & hard scenes (0.0-1.0) */
63
    float qblur;      /* amount of qscale smoothing over time (0.0-1.0) */
64
    int qmin;         /* min qscale */
65
    int qmax;         /* max qscale */
66
    int max_qdiff;    /* max qscale difference between frames */
67
    int encoding;     /* true if we are encoding (vs decoding) */
68
    int hq;           /* set if CODEC_FLAG_HQ is used in AVCodecContext.flags */
69
    /* the following fields are managed internally by the encoder */
70

    
71
    /* bit output */
72
    PutBitContext pb;
73

    
74
    /* sequence parameters */
75
    int context_initialized;
76
    int picture_number;
77
    int fake_picture_number; /* picture number at the bitstream frame rate */
78
    int gop_picture_number;  /* index of the first picture of a GOP based on fake_pic_num & mpeg1 specific */
79
    int picture_in_gop_number; /* 0-> first pic in gop, ... */
80
    int mb_width, mb_height;
81
    int mb_num;                /* number of MBs of a picture */
82
    int linesize;              /* line size, in bytes, may be different from width */
83
    UINT8 *new_picture[3];     /* picture to be compressed */
84
    UINT8 *last_picture[3];    /* previous picture */
85
    UINT8 *last_picture_base[3]; /* real start of the picture */
86
    UINT8 *next_picture[3];    /* previous picture (for bidir pred) */
87
    UINT8 *next_picture_base[3]; /* real start of the picture */
88
    UINT8 *aux_picture[3];    /* aux picture (for B frames only) */
89
    UINT8 *aux_picture_base[3]; /* real start of the picture */
90
    UINT8 *current_picture[3]; /* buffer to store the decompressed current picture */
91
    int last_dc[3]; /* last DC values for MPEG1 */
92
    INT16 *dc_val[3]; /* used for mpeg4 DC prediction, all 3 arrays must be continuous */
93
    int y_dc_scale, c_dc_scale;
94
    UINT8 *coded_block; /* used for coded block pattern prediction */
95
    INT16 (*ac_val[3])[16]; /* used for for mpeg4 AC prediction, all 3 arrays must be continuous */
96
    int ac_pred;
97
    int mb_skiped;              /* MUST BE SET only during DECODING */
98
    UINT8 *mbskip_table;        /* used to avoid copy if macroblock
99
                                   skipped (for black regions for example) */
100
    UINT8 *mbintra_table;            /* used to kill a few memsets */
101

    
102
    int qscale;
103
    int pict_type;
104
    int last_non_b_pict_type; /* used for mpeg4 gmc b-frames */
105
    int last_pict_type; /* used for bit rate stuff (needs that to update the right predictor) */
106
    int frame_rate_index;
107
    /* motion compensation */
108
    int unrestricted_mv;
109
    int h263_long_vectors; /* use horrible h263v1 long vector mode */
110

    
111
    int f_code; /* resolution */
112
    int b_code; /* backward resolution for B Frames (mpeg4) */
113
    INT16 *mv_table[2];    /* MV table (1MV per MB)*/
114
    INT16 (*motion_val)[2]; /* used for MV prediction (4MV per MB)*/
115
    int full_search;
116
    int mv_dir;
117
#define MV_DIR_BACKWARD  1
118
#define MV_DIR_FORWARD   2
119
#define MV_DIRECT        4 // bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
120
    int mv_type;
121
#define MV_TYPE_16X16       0   /* 1 vector for the whole mb */
122
#define MV_TYPE_8X8         1   /* 4 vectors (h263, mpeg4 4MV) */
123
#define MV_TYPE_16X8        2   /* 2 vectors, one per 16x8 block */ 
124
#define MV_TYPE_FIELD       3   /* 2 vectors, one per field */ 
125
#define MV_TYPE_DMV         4   /* 2 vectors, special mpeg2 Dual Prime Vectors */
126
    /* motion vectors for a macroblock 
127
       first coordinate : 0 = forward 1 = backward
128
       second "         : depend on type
129
       third  "         : 0 = x, 1 = y
130
    */
131
    int mv[2][4][2];
132
    int field_select[2][2];
133
    int last_mv[2][2][2];
134
    UINT16 (*mv_penalty)[MAX_MV*2+1]; /* amount of bits needed to encode a MV, used for ME */
135
    UINT8 *fcode_tab; /* smallest fcode needed for each MV */
136

    
137
    int has_b_frames;
138
    int no_rounding; /* apply no rounding to motion estimation (MPEG4) */
139

    
140
    /* macroblock layer */
141
    int mb_x, mb_y;
142
    int mb_incr;
143
    int mb_intra;
144
    INT16 *mb_var;      /* Table for MB variances */
145
    char *mb_type;    /* Table for MB type */
146

    
147
    int block_index[6];
148
    int block_wrap[6];
149

    
150
    /* matrix transmitted in the bitstream */
151
    UINT16 intra_matrix[64];
152
    UINT16 chroma_intra_matrix[64];
153
    UINT16 non_intra_matrix[64];
154
    UINT16 chroma_non_intra_matrix[64];
155
    /* precomputed matrix (combine qscale and DCT renorm) */
156
    int q_intra_matrix[64];
157
    int q_non_intra_matrix[64];
158
    /* identical to the above but for MMX & these are not permutated */
159
    UINT16 __align8 q_intra_matrix16[64] ;
160
    UINT16 __align8 q_non_intra_matrix16[64];
161
    int block_last_index[6];  /* last non zero coefficient in block */
162

    
163
    void *opaque; /* private data for the user */
164

    
165
    /* bit rate control */
166
    int I_frame_bits;    /* wanted number of bits per I frame */
167
    int P_frame_bits;    /* same for P frame */
168
    int avg_mb_var;        /* average MB variance for current frame */
169
    int mc_mb_var;     /* motion compensated MB variance for current frame */
170
    int last_mc_mb_var;     /* motion compensated MB variance for last frame */
171
    INT64 wanted_bits;
172
    INT64 total_bits;
173
    int frame_bits;      /* bits used for the current frame */
174
    int last_frame_bits; /* bits used for the last frame */
175
    Predictor i_pred;
176
    Predictor p_pred;
177
    double qsum;         /* sum of qscales */
178
    double qcount;       /* count of qscales */
179
    double short_term_qsum;   /* sum of recent qscales */
180
    double short_term_qcount; /* count of recent qscales */
181

    
182
    /* statistics, used for 2-pass encoding */
183
    int mv_bits;
184
    int header_bits;
185
    int i_tex_bits;
186
    int p_tex_bits;
187
    int i_count;
188
    int p_count;
189
    int skip_count;
190
    int misc_bits; // cbp, mb_type
191
    int last_bits; //temp var used for calculating the above vars
192

    
193
    /* H.263 specific */
194
    int gob_number;
195
    int gob_index;
196
    int first_gob_line;
197
        
198
    /* H.263+ specific */
199
    int umvplus;
200
    int umvplus_dec;
201
    int h263_aic; /* Advanded INTRA Coding (AIC) */
202
    int h263_aic_dir; /* AIC direction: 0 = left, 1 = top */
203
    
204
    /* mpeg4 specific */
205
    int time_increment_resolution;
206
    int time_increment_bits;
207
    int time_increment;
208
    int time_base;
209
    int time;
210
    int last_non_b_time[2];
211
    int shape;
212
    int vol_sprite_usage;
213
    int sprite_width;
214
    int sprite_height;
215
    int sprite_left;
216
    int sprite_top;
217
    int sprite_brightness_change;
218
    int num_sprite_warping_points;
219
    int real_sprite_warping_points;
220
    int sprite_offset[2][2];
221
    int sprite_delta[2][2][2];
222
    int sprite_shift[2][2];
223
    int mcsel;
224
    int quant_precision;
225
    int quarter_sample;
226
    int scalability;
227
    int new_pred;
228
    int reduced_res_vop;
229
    int aspect_ratio_info;
230
    int sprite_warping_accuracy;
231
    int low_latency_sprite;
232
    int data_partioning;
233

    
234
    /* divx specific, used to workaround (many) bugs in divx5 */
235
    int divx_version;
236
    int divx_build;
237

    
238
    /* RV10 specific */
239
    int rv10_version; /* RV10 version: 0 or 3 */
240
    int rv10_first_dc_coded[3];
241
    
242
    /* MJPEG specific */
243
    struct MJpegContext *mjpeg_ctx;
244
    int mjpeg_vsample[3]; /* vertical sampling factors, default = {2, 1, 1} */
245
    int mjpeg_hsample[3]; /* horizontal sampling factors, default = {2, 1, 1} */
246
    int mjpeg_write_tables; /* do we want to have quantisation- and
247
                               huffmantables in the jpeg file ? */
248

    
249
    /* MSMPEG4 specific */
250
    int mv_table_index;
251
    int rl_table_index;
252
    int rl_chroma_table_index;
253
    int dc_table_index;
254
    int use_skip_mb_code;
255
    int slice_height;      /* in macroblocks */
256
    int first_slice_line;  
257
    int flipflop_rounding;
258
    int bitrate;
259
    /* decompression specific */
260
    GetBitContext gb;
261

    
262
    /* MPEG2 specific - I wish I had not to support this mess. */
263
    int progressive_sequence;
264
    int mpeg_f_code[2][2];
265
    int picture_structure;
266
/* picture type */
267
#define PICT_TOP_FIELD     1
268
#define PICT_BOTTOM_FIELD  2
269
#define PICT_FRAME         3
270

    
271
    int intra_dc_precision;
272
    int frame_pred_frame_dct;
273
    int top_field_first;
274
    int concealment_motion_vectors;
275
    int q_scale_type;
276
    int intra_vlc_format;
277
    int alternate_scan;
278
    int repeat_first_field;
279
    int chroma_420_type;
280
    int progressive_frame;
281
    int mpeg2;
282
    int full_pel[2];
283
    int interlaced_dct;
284
    int last_qscale;
285
    int first_slice;
286
    
287
    /* RTP specific */
288
    /* These are explained on avcodec.h */
289
    int rtp_mode;
290
    int rtp_payload_size;
291
    void (*rtp_callback)(void *data, int size, int packet_number);
292
    UINT8 *ptr_lastgob;
293
    UINT8 *ptr_last_mb_line;
294
    UINT32 mb_line_avgsize;
295
    
296
    DCTELEM block[6][64] __align8;
297
    void (*dct_unquantize)(struct MpegEncContext *s, 
298
                           DCTELEM *block, int n, int qscale);
299
} MpegEncContext;
300

    
301
int MPV_common_init(MpegEncContext *s);
302
void MPV_common_end(MpegEncContext *s);
303
void MPV_decode_mb(MpegEncContext *s, DCTELEM block[6][64]);
304
void MPV_frame_start(MpegEncContext *s);
305
void MPV_frame_end(MpegEncContext *s);
306
#ifdef HAVE_MMX
307
void MPV_common_init_mmx(MpegEncContext *s);
308
#endif
309

    
310
/* motion_est.c */
311

    
312
int estimate_motion(MpegEncContext *s, 
313
                    int mb_x, int mb_y,
314
                    int *mx_ptr, int *my_ptr);
315

    
316
/* mpeg12.c */
317
extern INT16 default_intra_matrix[64];
318
extern INT16 default_non_intra_matrix[64];
319

    
320
void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
321
void mpeg1_encode_mb(MpegEncContext *s,
322
                     DCTELEM block[6][64],
323
                     int motion_x, int motion_y);
324
void mpeg1_encode_init(MpegEncContext *s);
325

    
326
/* h263enc.c */
327

    
328
/* run length table */
329
#define MAX_RUN    64
330
#define MAX_LEVEL  64
331

    
332
typedef struct RLTable {
333
    int n; /* number of entries of table_vlc minus 1 */
334
    int last; /* number of values for last = 0 */
335
    const UINT16 (*table_vlc)[2];
336
    const INT8 *table_run;
337
    const INT8 *table_level;
338
    UINT8 *index_run[2]; /* encoding only */
339
    INT8 *max_level[2]; /* encoding & decoding */
340
    INT8 *max_run[2];   /* encoding & decoding */
341
    VLC vlc;            /* decoding only */
342
} RLTable;
343

    
344
void init_rl(RLTable *rl);
345
void init_vlc_rl(RLTable *rl);
346

    
347
static inline int get_rl_index(const RLTable *rl, int last, int run, int level)
348
{
349
    int index;
350
    index = rl->index_run[last][run];
351
    if (index >= rl->n)
352
        return rl->n;
353
    if (level > rl->max_level[last][run])
354
        return rl->n;
355
    return index + level - 1;
356
}
357

    
358
void h263_encode_mb(MpegEncContext *s, 
359
                    DCTELEM block[6][64],
360
                    int motion_x, int motion_y);
361
void mpeg4_encode_mb(MpegEncContext *s, 
362
                    DCTELEM block[6][64],
363
                    int motion_x, int motion_y);
364
void h263_encode_picture_header(MpegEncContext *s, int picture_number);
365
int h263_encode_gob_header(MpegEncContext * s, int mb_line);
366
void h263_dc_scale(MpegEncContext *s);
367
INT16 *h263_pred_motion(MpegEncContext * s, int block, 
368
                        int *px, int *py);
369
void mpeg4_pred_ac(MpegEncContext * s, INT16 *block, int n, 
370
                   int dir);
371
void mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);
372
void h263_encode_init(MpegEncContext *s);
373

    
374
void h263_decode_init_vlc(MpegEncContext *s);
375
int h263_decode_picture_header(MpegEncContext *s);
376
int h263_decode_gob_header(MpegEncContext *s);
377
int mpeg4_decode_picture_header(MpegEncContext * s);
378
int intel_h263_decode_picture_header(MpegEncContext *s);
379
int h263_decode_mb(MpegEncContext *s,
380
                   DCTELEM block[6][64]);
381
int h263_get_picture_format(int width, int height);
382

    
383
/* rv10.c */
384
void rv10_encode_picture_header(MpegEncContext *s, int picture_number);
385
int rv_decode_dc(MpegEncContext *s, int n);
386

    
387
/* msmpeg4.c */
388
void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
389
void msmpeg4_encode_ext_header(MpegEncContext * s);
390
void msmpeg4_encode_mb(MpegEncContext * s, 
391
                       DCTELEM block[6][64],
392
                       int motion_x, int motion_y);
393
void msmpeg4_dc_scale(MpegEncContext * s);
394
int msmpeg4_decode_picture_header(MpegEncContext * s);
395
int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
396
int msmpeg4_decode_mb(MpegEncContext *s, 
397
                      DCTELEM block[6][64]);
398
int msmpeg4_decode_init_vlc(MpegEncContext *s);
399

    
400
/* mjpegenc.c */
401

    
402
int mjpeg_init(MpegEncContext *s);
403
void mjpeg_close(MpegEncContext *s);
404
void mjpeg_encode_mb(MpegEncContext *s, 
405
                     DCTELEM block[6][64]);
406
void mjpeg_picture_header(MpegEncContext *s);
407
void mjpeg_picture_trailer(MpegEncContext *s);