Libav
msmpeg4enc.c
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1 /*
2  * MSMPEG4 encoder backend
3  * Copyright (c) 2001 Fabrice Bellard
4  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5  *
6  * msmpeg4v1 & v2 stuff by Michael Niedermayer <michaelni@gmx.at>
7  *
8  * This file is part of Libav.
9  *
10  * Libav is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * Libav is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with Libav; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  */
24 
30 #include <stdint.h>
31 #include <string.h>
32 
33 #include "libavutil/attributes.h"
34 #include "libavutil/avutil.h"
35 #include "libavutil/mem.h"
36 #include "mpegvideo.h"
37 #include "msmpeg4.h"
38 #include "h263.h"
39 #include "internal.h"
40 #include "mpeg4video.h"
41 #include "msmpeg4.h"
42 #include "msmpeg4data.h"
43 #include "put_bits.h"
44 #include "rl.h"
45 #include "vc1data.h"
46 
48 
49 /* build the table which associate a (x,y) motion vector to a vlc */
51 {
52  int i, x, y;
53 
54  tab->table_mv_index = av_malloc(sizeof(uint16_t) * 4096);
55  if (!tab->table_mv_index)
56  return AVERROR(ENOMEM);
57 
58  /* mark all entries as not used */
59  for(i=0;i<4096;i++)
60  tab->table_mv_index[i] = tab->n;
61 
62  for(i=0;i<tab->n;i++) {
63  x = tab->table_mvx[i];
64  y = tab->table_mvy[i];
65  tab->table_mv_index[(x << 6) | y] = i;
66  }
67 
68  return 0;
69 }
70 
72 {
73  if (n == 0) {
74  put_bits(pb, 1, 0);
75  } else {
76  put_bits(pb, 1, 1);
77  put_bits(pb, 1, (n >= 2));
78  }
79 }
80 
81 static int get_size_of_code(MpegEncContext * s, RLTable *rl, int last, int run, int level, int intra){
82  int size=0;
83  int code;
84  int run_diff= intra ? 0 : 1;
85 
86  code = get_rl_index(rl, last, run, level);
87  size+= rl->table_vlc[code][1];
88  if (code == rl->n) {
89  int level1, run1;
90 
91  level1 = level - rl->max_level[last][run];
92  if (level1 < 1)
93  goto esc2;
94  code = get_rl_index(rl, last, run, level1);
95  if (code == rl->n) {
96  esc2:
97  size++;
98  if (level > MAX_LEVEL)
99  goto esc3;
100  run1 = run - rl->max_run[last][level] - run_diff;
101  if (run1 < 0)
102  goto esc3;
103  code = get_rl_index(rl, last, run1, level);
104  if (code == rl->n) {
105  esc3:
106  /* third escape */
107  size+=1+1+6+8;
108  } else {
109  /* second escape */
110  size+= 1+1+ rl->table_vlc[code][1];
111  }
112  } else {
113  /* first escape */
114  size+= 1+1+ rl->table_vlc[code][1];
115  }
116  } else {
117  size++;
118  }
119  return size;
120 }
121 
123 {
124  static int init_done=0;
125  int i, ret;
126 
128  if(s->msmpeg4_version>=4){
129  s->min_qcoeff= -255;
130  s->max_qcoeff= 255;
131  }
132 
133  if (!init_done) {
134  /* init various encoding tables */
135  init_done = 1;
136  if ((ret = init_mv_table(&ff_mv_tables[0])) < 0)
137  return ret;
138  if ((ret = init_mv_table(&ff_mv_tables[1])) < 0)
139  return ret;
140  for(i=0;i<NB_RL_TABLES;i++)
142 
143  for(i=0; i<NB_RL_TABLES; i++){
144  int level;
145  for (level = 1; level <= MAX_LEVEL; level++) {
146  int run;
147  for(run=0; run<=MAX_RUN; run++){
148  int last;
149  for(last=0; last<2; last++){
150  rl_length[i][level][run][last]= get_size_of_code(s, &ff_rl_table[ i], last, run, level, 0);
151  }
152  }
153  }
154  }
155  }
156 
157  return 0;
158 }
159 
161 {
162  int i;
163  int best =-1, best_size =9999999;
164  int chroma_best=-1, best_chroma_size=9999999;
165 
166  for(i=0; i<3; i++){
167  int level;
168  int chroma_size=0;
169  int size=0;
170 
171  if(i>0){// ;)
172  size++;
173  chroma_size++;
174  }
175  for(level=0; level<=MAX_LEVEL; level++){
176  int run;
177  for(run=0; run<=MAX_RUN; run++){
178  int last;
179  const int last_size= size + chroma_size;
180  for(last=0; last<2; last++){
181  int inter_count = s->ac_stats[0][0][level][run][last] + s->ac_stats[0][1][level][run][last];
182  int intra_luma_count = s->ac_stats[1][0][level][run][last];
183  int intra_chroma_count= s->ac_stats[1][1][level][run][last];
184 
186  size += intra_luma_count *rl_length[i ][level][run][last];
187  chroma_size+= intra_chroma_count*rl_length[i+3][level][run][last];
188  }else{
189  size+= intra_luma_count *rl_length[i ][level][run][last]
190  +intra_chroma_count*rl_length[i+3][level][run][last]
191  +inter_count *rl_length[i+3][level][run][last];
192  }
193  }
194  if(last_size == size+chroma_size) break;
195  }
196  }
197  if(size<best_size){
198  best_size= size;
199  best= i;
200  }
201  if(chroma_size<best_chroma_size){
202  best_chroma_size= chroma_size;
203  chroma_best= i;
204  }
205  }
206 
207  if(s->pict_type==AV_PICTURE_TYPE_P) chroma_best= best;
208 
209  memset(s->ac_stats, 0, sizeof(int)*(MAX_LEVEL+1)*(MAX_RUN+1)*2*2*2);
210 
211  s->rl_table_index = best;
212  s->rl_chroma_table_index= chroma_best;
213 
214  if(s->pict_type != s->last_non_b_pict_type){
215  s->rl_table_index= 2;
217  s->rl_chroma_table_index= 1;
218  else
219  s->rl_chroma_table_index= 2;
220  }
221 
222 }
223 
224 /* write MSMPEG4 compatible frame header */
226 {
227  find_best_tables(s);
228 
230  put_bits(&s->pb, 2, s->pict_type - 1);
231 
232  put_bits(&s->pb, 5, s->qscale);
233  if(s->msmpeg4_version<=2){
234  s->rl_table_index = 2;
235  s->rl_chroma_table_index = 2;
236  }
237 
238  s->dc_table_index = 1;
239  s->mv_table_index = 1; /* only if P-frame */
240  s->use_skip_mb_code = 1; /* only if P-frame */
241  s->per_mb_rl_table = 0;
242  if(s->msmpeg4_version==4)
243  s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE && s->pict_type==AV_PICTURE_TYPE_P);
244  ff_dlog(s, "%d %d %d %d %d\n", s->pict_type, s->bit_rate,
245  s->inter_intra_pred, s->width, s->height);
246 
247  if (s->pict_type == AV_PICTURE_TYPE_I) {
248  s->slice_height= s->mb_height/1;
249  put_bits(&s->pb, 5, 0x16 + s->mb_height/s->slice_height);
250 
251  if(s->msmpeg4_version==4){
253  if(s->bit_rate>MBAC_BITRATE)
254  put_bits(&s->pb, 1, s->per_mb_rl_table);
255  }
256 
257  if(s->msmpeg4_version>2){
258  if(!s->per_mb_rl_table){
261  }
262 
263  put_bits(&s->pb, 1, s->dc_table_index);
264  }
265  } else {
266  put_bits(&s->pb, 1, s->use_skip_mb_code);
267 
268  if(s->msmpeg4_version==4 && s->bit_rate>MBAC_BITRATE)
269  put_bits(&s->pb, 1, s->per_mb_rl_table);
270 
271  if(s->msmpeg4_version>2){
272  if(!s->per_mb_rl_table)
274 
275  put_bits(&s->pb, 1, s->dc_table_index);
276 
277  put_bits(&s->pb, 1, s->mv_table_index);
278  }
279  }
280 
281  s->esc3_level_length= 0;
282  s->esc3_run_length= 0;
283 }
284 
286 {
287  put_bits(&s->pb, 5, s->avctx->time_base.den / s->avctx->time_base.num); //yes 29.97 -> 29
288 
289  put_bits(&s->pb, 11, FFMIN(s->bit_rate/1024, 2047));
290 
291  if(s->msmpeg4_version>=3)
292  put_bits(&s->pb, 1, s->flipflop_rounding);
293  else
294  assert(s->flipflop_rounding==0);
295 }
296 
298  int mx, int my)
299 {
300  int code;
301  MVTable *mv;
302 
303  /* modulo encoding */
304  /* WARNING : you cannot reach all the MVs even with the modulo
305  encoding. This is a somewhat strange compromise they took !!! */
306  if (mx <= -64)
307  mx += 64;
308  else if (mx >= 64)
309  mx -= 64;
310  if (my <= -64)
311  my += 64;
312  else if (my >= 64)
313  my -= 64;
314 
315  mx += 32;
316  my += 32;
317  mv = &ff_mv_tables[s->mv_table_index];
318 
319  code = mv->table_mv_index[(mx << 6) | my];
320  put_bits(&s->pb,
321  mv->table_mv_bits[code],
322  mv->table_mv_code[code]);
323  if (code == mv->n) {
324  /* escape : code literally */
325  put_bits(&s->pb, 6, mx);
326  put_bits(&s->pb, 6, my);
327  }
328 }
329 
331  if (s->mb_x == 0) {
332  if (s->slice_height && (s->mb_y % s->slice_height) == 0) {
333  if(s->msmpeg4_version < 4){
335  }
336  s->first_slice_line = 1;
337  } else {
338  s->first_slice_line = 0;
339  }
340  }
341 }
342 
343 static void msmpeg4v2_encode_motion(MpegEncContext * s, int val)
344 {
345  int range, bit_size, sign, code, bits;
346 
347  if (val == 0) {
348  /* zero vector */
349  code = 0;
350  put_bits(&s->pb, ff_mvtab[code][1], ff_mvtab[code][0]);
351  } else {
352  bit_size = s->f_code - 1;
353  range = 1 << bit_size;
354  if (val <= -64)
355  val += 64;
356  else if (val >= 64)
357  val -= 64;
358 
359  if (val >= 0) {
360  sign = 0;
361  } else {
362  val = -val;
363  sign = 1;
364  }
365  val--;
366  code = (val >> bit_size) + 1;
367  bits = val & (range - 1);
368 
369  put_bits(&s->pb, ff_mvtab[code][1] + 1, (ff_mvtab[code][0] << 1) | sign);
370  if (bit_size > 0) {
371  put_bits(&s->pb, bit_size, bits);
372  }
373  }
374 }
375 
377  int16_t block[6][64],
378  int motion_x, int motion_y)
379 {
380  int cbp, coded_cbp, i;
381  int pred_x, pred_y;
382  uint8_t *coded_block;
383 
385 
386  if (!s->mb_intra) {
387  /* compute cbp */
388  cbp = 0;
389  for (i = 0; i < 6; i++) {
390  if (s->block_last_index[i] >= 0)
391  cbp |= 1 << (5 - i);
392  }
393  if (s->use_skip_mb_code && (cbp | motion_x | motion_y) == 0) {
394  /* skip macroblock */
395  put_bits(&s->pb, 1, 1);
396  s->last_bits++;
397  s->misc_bits++;
398  s->skip_count++;
399 
400  return;
401  }
402  if (s->use_skip_mb_code)
403  put_bits(&s->pb, 1, 0); /* mb coded */
404 
405  if(s->msmpeg4_version<=2){
406  put_bits(&s->pb,
407  ff_v2_mb_type[cbp&3][1],
408  ff_v2_mb_type[cbp&3][0]);
409  if((cbp&3) != 3) coded_cbp= cbp ^ 0x3C;
410  else coded_cbp= cbp;
411 
412  put_bits(&s->pb,
413  ff_h263_cbpy_tab[coded_cbp>>2][1],
414  ff_h263_cbpy_tab[coded_cbp>>2][0]);
415 
416  s->misc_bits += get_bits_diff(s);
417 
418  ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
419  msmpeg4v2_encode_motion(s, motion_x - pred_x);
420  msmpeg4v2_encode_motion(s, motion_y - pred_y);
421  }else{
422  put_bits(&s->pb,
423  ff_table_mb_non_intra[cbp + 64][1],
424  ff_table_mb_non_intra[cbp + 64][0]);
425 
426  s->misc_bits += get_bits_diff(s);
427 
428  /* motion vector */
429  ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
430  ff_msmpeg4_encode_motion(s, motion_x - pred_x,
431  motion_y - pred_y);
432  }
433 
434  s->mv_bits += get_bits_diff(s);
435 
436  for (i = 0; i < 6; i++) {
437  ff_msmpeg4_encode_block(s, block[i], i);
438  }
439  s->p_tex_bits += get_bits_diff(s);
440  } else {
441  /* compute cbp */
442  cbp = 0;
443  coded_cbp = 0;
444  for (i = 0; i < 6; i++) {
445  int val, pred;
446  val = (s->block_last_index[i] >= 1);
447  cbp |= val << (5 - i);
448  if (i < 4) {
449  /* predict value for close blocks only for luma */
450  pred = ff_msmpeg4_coded_block_pred(s, i, &coded_block);
451  *coded_block = val;
452  val = val ^ pred;
453  }
454  coded_cbp |= val << (5 - i);
455  }
456 
457  if(s->msmpeg4_version<=2){
458  if (s->pict_type == AV_PICTURE_TYPE_I) {
459  put_bits(&s->pb,
460  ff_v2_intra_cbpc[cbp&3][1], ff_v2_intra_cbpc[cbp&3][0]);
461  } else {
462  if (s->use_skip_mb_code)
463  put_bits(&s->pb, 1, 0); /* mb coded */
464  put_bits(&s->pb,
465  ff_v2_mb_type[(cbp&3) + 4][1],
466  ff_v2_mb_type[(cbp&3) + 4][0]);
467  }
468  put_bits(&s->pb, 1, 0); /* no AC prediction yet */
469  put_bits(&s->pb,
470  ff_h263_cbpy_tab[cbp>>2][1],
471  ff_h263_cbpy_tab[cbp>>2][0]);
472  }else{
473  if (s->pict_type == AV_PICTURE_TYPE_I) {
474  put_bits(&s->pb,
475  ff_msmp4_mb_i_table[coded_cbp][1], ff_msmp4_mb_i_table[coded_cbp][0]);
476  } else {
477  if (s->use_skip_mb_code)
478  put_bits(&s->pb, 1, 0); /* mb coded */
479  put_bits(&s->pb,
480  ff_table_mb_non_intra[cbp][1],
481  ff_table_mb_non_intra[cbp][0]);
482  }
483  put_bits(&s->pb, 1, 0); /* no AC prediction yet */
484  if(s->inter_intra_pred){
485  s->h263_aic_dir=0;
487  }
488  }
489  s->misc_bits += get_bits_diff(s);
490 
491  for (i = 0; i < 6; i++) {
492  ff_msmpeg4_encode_block(s, block[i], i);
493  }
494  s->i_tex_bits += get_bits_diff(s);
495  s->i_count++;
496  }
497 }
498 
499 static void msmpeg4_encode_dc(MpegEncContext * s, int level, int n, int *dir_ptr)
500 {
501  int sign, code;
502  int pred, extquant;
503  int extrabits = 0;
504 
505  int16_t *dc_val;
506  pred = ff_msmpeg4_pred_dc(s, n, &dc_val, dir_ptr);
507 
508  /* update predictor */
509  if (n < 4) {
510  *dc_val = level * s->y_dc_scale;
511  } else {
512  *dc_val = level * s->c_dc_scale;
513  }
514 
515  /* do the prediction */
516  level -= pred;
517 
518  if(s->msmpeg4_version<=2){
519  if (n < 4) {
520  put_bits(&s->pb,
521  ff_v2_dc_lum_table[level + 256][1],
522  ff_v2_dc_lum_table[level + 256][0]);
523  }else{
524  put_bits(&s->pb,
525  ff_v2_dc_chroma_table[level + 256][1],
526  ff_v2_dc_chroma_table[level + 256][0]);
527  }
528  }else{
529  sign = 0;
530  if (level < 0) {
531  level = -level;
532  sign = 1;
533  }
534  code = level;
535  if (code > DC_MAX)
536  code = DC_MAX;
537  else if( s->msmpeg4_version>=6 ) {
538  if( s->qscale == 1 ) {
539  extquant = (level + 3) & 0x3;
540  code = ((level+3)>>2);
541  } else if( s->qscale == 2 ) {
542  extquant = (level + 1) & 0x1;
543  code = ((level+1)>>1);
544  }
545  }
546 
547  if (s->dc_table_index == 0) {
548  if (n < 4) {
549  put_bits(&s->pb, ff_table0_dc_lum[code][1], ff_table0_dc_lum[code][0]);
550  } else {
551  put_bits(&s->pb, ff_table0_dc_chroma[code][1], ff_table0_dc_chroma[code][0]);
552  }
553  } else {
554  if (n < 4) {
555  put_bits(&s->pb, ff_table1_dc_lum[code][1], ff_table1_dc_lum[code][0]);
556  } else {
557  put_bits(&s->pb, ff_table1_dc_chroma[code][1], ff_table1_dc_chroma[code][0]);
558  }
559  }
560 
561  if(s->msmpeg4_version>=6 && s->qscale<=2)
562  extrabits = 3 - s->qscale;
563 
564  if (code == DC_MAX)
565  put_bits(&s->pb, 8 + extrabits, level);
566  else if(extrabits > 0)//== VC1 && s->qscale<=2
567  put_bits(&s->pb, extrabits, extquant);
568 
569  if (level != 0) {
570  put_bits(&s->pb, 1, sign);
571  }
572  }
573 }
574 
575 /* Encoding of a block; very similar to MPEG-4 except for a different
576  * escape coding (same as H.263) and more VLC tables. */
577 void ff_msmpeg4_encode_block(MpegEncContext * s, int16_t * block, int n)
578 {
579  int level, run, last, i, j, last_index;
580  int last_non_zero, sign, slevel;
581  int code, run_diff, dc_pred_dir;
582  const RLTable *rl;
583  const uint8_t *scantable;
584 
585  if (s->mb_intra) {
586  msmpeg4_encode_dc(s, block[0], n, &dc_pred_dir);
587  i = 1;
588  if (n < 4) {
589  rl = &ff_rl_table[s->rl_table_index];
590  } else {
591  rl = &ff_rl_table[3 + s->rl_chroma_table_index];
592  }
593  run_diff = s->msmpeg4_version>=4;
594  scantable= s->intra_scantable.permutated;
595  } else {
596  i = 0;
597  rl = &ff_rl_table[3 + s->rl_table_index];
598  if(s->msmpeg4_version<=2)
599  run_diff = 0;
600  else
601  run_diff = 1;
602  scantable= s->inter_scantable.permutated;
603  }
604 
605  /* recalculate block_last_index for M$ wmv1 */
606  if(s->msmpeg4_version>=4 && s->msmpeg4_version<6 && s->block_last_index[n]>0){
607  for(last_index=63; last_index>=0; last_index--){
608  if(block[scantable[last_index]]) break;
609  }
610  s->block_last_index[n]= last_index;
611  }else
612  last_index = s->block_last_index[n];
613  /* AC coefs */
614  last_non_zero = i - 1;
615  for (; i <= last_index; i++) {
616  j = scantable[i];
617  level = block[j];
618  if (level) {
619  run = i - last_non_zero - 1;
620  last = (i == last_index);
621  sign = 0;
622  slevel = level;
623  if (level < 0) {
624  sign = 1;
625  level = -level;
626  }
627 
628  if(level<=MAX_LEVEL && run<=MAX_RUN){
629  s->ac_stats[s->mb_intra][n>3][level][run][last]++;
630  }
631 
632  s->ac_stats[s->mb_intra][n > 3][40][63][0]++; //esc3 like
633 
634  code = get_rl_index(rl, last, run, level);
635  put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
636  if (code == rl->n) {
637  int level1, run1;
638 
639  level1 = level - rl->max_level[last][run];
640  if (level1 < 1)
641  goto esc2;
642  code = get_rl_index(rl, last, run, level1);
643  if (code == rl->n) {
644  esc2:
645  put_bits(&s->pb, 1, 0);
646  if (level > MAX_LEVEL)
647  goto esc3;
648  run1 = run - rl->max_run[last][level] - run_diff;
649  if (run1 < 0)
650  goto esc3;
651  code = get_rl_index(rl, last, run1+1, level);
652  if (s->msmpeg4_version == 4 && code == rl->n)
653  goto esc3;
654  code = get_rl_index(rl, last, run1, level);
655  if (code == rl->n) {
656  esc3:
657  /* third escape */
658  put_bits(&s->pb, 1, 0);
659  put_bits(&s->pb, 1, last);
660  if(s->msmpeg4_version>=4){
661  if(s->esc3_level_length==0){
662  s->esc3_level_length=8;
663  s->esc3_run_length= 6;
664  //ESCLVLSZ + ESCRUNSZ
665  if(s->qscale<8)
666  put_bits(&s->pb, 6 + (s->msmpeg4_version>=6), 3);
667  else
668  put_bits(&s->pb, 8, 3);
669  }
670  put_bits(&s->pb, s->esc3_run_length, run);
671  put_bits(&s->pb, 1, sign);
672  put_bits(&s->pb, s->esc3_level_length, level);
673  }else{
674  put_bits(&s->pb, 6, run);
675  put_sbits(&s->pb, 8, slevel);
676  }
677  } else {
678  /* second escape */
679  put_bits(&s->pb, 1, 1);
680  put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
681  put_bits(&s->pb, 1, sign);
682  }
683  } else {
684  /* first escape */
685  put_bits(&s->pb, 1, 1);
686  put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
687  put_bits(&s->pb, 1, sign);
688  }
689  } else {
690  put_bits(&s->pb, 1, sign);
691  }
692  last_non_zero = i;
693  }
694  }
695 }
int inter_intra_pred
Definition: mpegvideo.h:427
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:62
int size
int esc3_level_length
Definition: mpegvideo.h:423
uint32_t ff_v2_dc_lum_table[512][2]
Definition: msmpeg4data.c:34
const uint32_t ff_table_mb_non_intra[128][2]
Definition: msmpeg4data.c:63
static void put_sbits(PutBitContext *pb, int n, int32_t value)
Definition: put_bits.h:172
const uint32_t ff_table0_dc_lum[120][2]
Definition: msmpeg4data.c:100
memory handling functions
uint32_t ff_v2_dc_chroma_table[512][2]
Definition: msmpeg4data.c:35
int msmpeg4_version
0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
Definition: mpegvideo.h:421
int num
numerator
Definition: rational.h:44
void avpriv_align_put_bits(PutBitContext *s)
Pad the bitstream with zeros up to the next byte boundary.
Definition: bitstream.c:46
external API header
int min_qcoeff
minimum encodable coefficient
Definition: mpegvideo.h:301
mpegvideo header.
#define NB_RL_TABLES
Definition: msmpeg4data.h:60
uint8_t permutated[64]
Definition: idctdsp.h:31
uint8_t run
Definition: svq3.c:203
static uint8_t rl_length[NB_RL_TABLES][MAX_LEVEL+1][MAX_RUN+1][2]
Definition: msmpeg4enc.c:47
int qscale
QP.
Definition: mpegvideo.h:199
RLTable.
Definition: rl.h:39
av_cold void ff_msmpeg4_common_init(MpegEncContext *s)
Definition: msmpeg4.c:105
int16_t * ff_h263_pred_motion(MpegEncContext *s, int block, int dir, int *px, int *py)
Definition: h263.c:309
Macro definitions for various function/variable attributes.
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1535
static int16_t block[64]
Definition: dct.c:97
void ff_mpeg4_clean_buffers(MpegEncContext *s)
Definition: mpeg4video.c:45
void ff_msmpeg4_encode_picture_header(MpegEncContext *s, int picture_number)
Definition: msmpeg4enc.c:225
int esc3_run_length
Definition: mpegvideo.h:424
int8_t * max_run[2]
encoding & decoding
Definition: rl.h:47
VC-1 tables.
uint8_t bits
Definition: crc.c:252
static av_cold int init_mv_table(MVTable *tab)
Definition: msmpeg4enc.c:50
const uint8_t ff_v2_intra_cbpc[4][2]
Definition: msmpeg4data.c:1791
uint8_t
#define av_cold
Definition: attributes.h:66
uint8_t ff_static_rl_table_store[NB_RL_TABLES][2][2 *MAX_RUN+MAX_LEVEL+3]
Definition: msmpeg4data.c:36
int misc_bits
cbp, mb_type
Definition: mpegvideo.h:340
#define MBAC_BITRATE
Definition: msmpeg4.h:38
MSMPEG4 data tables.
int8_t * max_level[2]
encoding & decoding
Definition: rl.h:46
const uint32_t ff_table0_dc_chroma[120][2]
Definition: msmpeg4data.c:133
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:124
int max_qcoeff
maximum encodable coefficient
Definition: mpegvideo.h:302
static void msmpeg4_encode_dc(MpegEncContext *s, int level, int n, int *dir_ptr)
Definition: msmpeg4enc.c:499
#define MAX_LEVEL
Definition: rl.h:36
int flipflop_rounding
Definition: mpegvideo.h:420
static void find_best_tables(MpegEncContext *s)
Definition: msmpeg4enc.c:160
static int get_bits_diff(MpegEncContext *s)
Definition: mpegvideo.h:694
int last_non_b_pict_type
used for MPEG-4 gmc B-frames & ratecontrol
Definition: mpegvideo.h:208
const uint16_t ff_msmp4_mb_i_table[64][2]
Definition: msmpeg4data.c:43
void ff_msmpeg4_encode_mb(MpegEncContext *s, int16_t block[6][64], int motion_x, int motion_y)
Definition: msmpeg4enc.c:376
int rl_chroma_table_index
Definition: mpegvideo.h:415
#define AVERROR(e)
Definition: error.h:43
int per_mb_rl_table
Definition: mpegvideo.h:422
static void put_bits(PutBitContext *s, int n, unsigned int value)
Write up to 31 bits into a bitstream.
Definition: put_bits.h:134
rl header.
int n
number of entries of table_vlc minus 1
Definition: rl.h:40
const uint8_t ff_v2_mb_type[8][2]
Definition: msmpeg4data.c:1786
int ff_msmpeg4_pred_dc(MpegEncContext *s, int n, int16_t **dc_val_ptr, int *dir_ptr)
Definition: msmpeg4.c:195
#define FFMIN(a, b)
Definition: common.h:66
const uint8_t * table_mvx
Definition: msmpeg4data.h:43
const uint16_t(* table_vlc)[2]
Definition: rl.h:42
const uint8_t * table_mv_bits
Definition: msmpeg4data.h:42
int(* ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2]
[mb_intra][isChroma][level][run][last]
Definition: mpegvideo.h:426
av_cold int ff_msmpeg4_encode_init(MpegEncContext *s)
Definition: msmpeg4enc.c:122
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:81
const uint32_t ff_table1_dc_chroma[120][2]
Definition: msmpeg4data.c:201
uint16_t * table_mv_index
Definition: msmpeg4data.h:45
static const float pred[4]
Definition: siprdata.h:259
static const int8_t mv[256][2]
Definition: 4xm.c:75
int first_slice_line
used in MPEG-4 too to handle resync markers
Definition: mpegvideo.h:419
void ff_msmpeg4_encode_block(MpegEncContext *s, int16_t *block, int n)
Definition: msmpeg4enc.c:577
#define ff_dlog(ctx,...)
Definition: internal.h:60
ScanTable intra_scantable
Definition: mpegvideo.h:86
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:95
void ff_msmpeg4_encode_ext_header(MpegEncContext *s)
Definition: msmpeg4enc.c:285
const uint16_t * table_mv_code
Definition: msmpeg4data.h:41
av_cold int ff_rl_init(RLTable *rl, uint8_t static_store[2][2 *MAX_RUN+MAX_LEVEL+3])
Definition: rl.c:38
#define DC_MAX
Definition: msmpeg4.h:40
const uint32_t ff_table1_dc_lum[120][2]
Definition: msmpeg4data.c:168
static void msmpeg4v2_encode_motion(MpegEncContext *s, int val)
Definition: msmpeg4enc.c:343
int slice_height
in macroblocks
Definition: mpegvideo.h:418
int use_skip_mb_code
Definition: mpegvideo.h:417
MVTable ff_mv_tables[2]
Definition: msmpeg4data.c:1773
int f_code
forward MV resolution
Definition: mpegvideo.h:229
const uint8_t ff_h263_cbpy_tab[16][2]
Definition: h263data.c:84
void ff_msmpeg4_code012(PutBitContext *pb, int n)
Definition: msmpeg4enc.c:71
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:206
int bit_rate
wanted bit rate
Definition: mpegvideo.h:98
#define II_BITRATE
Definition: msmpeg4.h:37
RLTable ff_rl_table[NB_RL_TABLES]
Definition: msmpeg4data.c:601
uint8_t level
Definition: svq3.c:204
MpegEncContext.
Definition: mpegvideo.h:76
#define MAX_RUN
Definition: rl.h:35
struct AVCodecContext * avctx
Definition: mpegvideo.h:93
PutBitContext pb
bit output
Definition: mpegvideo.h:146
void ff_msmpeg4_handle_slices(MpegEncContext *s)
Definition: msmpeg4enc.c:330
void ff_msmpeg4_encode_motion(MpegEncContext *s, int mx, int my)
Definition: msmpeg4enc.c:297
common internal api header.
int den
denominator
Definition: rational.h:45
static int get_rl_index(const RLTable *rl, int last, int run, int level)
Definition: rl.h:80
int last_bits
temp var used for calculating the above vars
Definition: mpegvideo.h:341
int rl_table_index
Definition: mpegvideo.h:414
static const struct twinvq_data tab
const uint8_t * table_mvy
Definition: msmpeg4data.h:44
ScanTable inter_scantable
if inter == intra then intra should be used to reduce the cache usage
Definition: mpegvideo.h:85
int ff_msmpeg4_coded_block_pred(MpegEncContext *s, int n, uint8_t **coded_block_ptr)
Definition: msmpeg4.c:155
static int get_size_of_code(MpegEncContext *s, RLTable *rl, int last, int run, int level, int intra)
Definition: msmpeg4enc.c:81
int mv_table_index
Definition: mpegvideo.h:413
int h263_aic_dir
AIC direction: 0 = left, 1 = top.
Definition: mpegvideo.h:363
const uint8_t ff_table_inter_intra[4][2]
Definition: msmpeg4data.c:1844
int dc_table_index
Definition: mpegvideo.h:416
Predicted.
Definition: avutil.h:261
const uint8_t ff_mvtab[33][2]
Definition: h263data.c:90
bitstream writer API