Libav
msmpeg4dec.c
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1 /*
2  * MSMPEG4 backend for encoder and decoder
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 
25 #include "avcodec.h"
26 #include "mpegutils.h"
27 #include "mpegvideo.h"
28 #include "msmpeg4.h"
29 #include "libavutil/x86/asm.h"
30 #include "h263.h"
31 #include "mpeg4video.h"
32 #include "msmpeg4data.h"
33 #include "vc1data.h"
34 
35 #define DC_VLC_BITS 9
36 #define V2_INTRA_CBPC_VLC_BITS 3
37 #define V2_MB_TYPE_VLC_BITS 7
38 #define MV_VLC_BITS 9
39 #define V2_MV_VLC_BITS 9
40 #define TEX_VLC_BITS 9
41 
42 #define DEFAULT_INTER_INDEX 3
43 
44 static inline int msmpeg4v1_pred_dc(MpegEncContext * s, int n,
45  int32_t **dc_val_ptr)
46 {
47  int i;
48 
49  if (n < 4) {
50  i= 0;
51  } else {
52  i= n-3;
53  }
54 
55  *dc_val_ptr= &s->last_dc[i];
56  return s->last_dc[i];
57 }
58 
59 /****************************************/
60 /* decoding stuff */
61 
67 static VLC v2_mv_vlc;
69 
70 /* This is identical to h263 except that its range is multiplied by 2. */
71 static int msmpeg4v2_decode_motion(MpegEncContext * s, int pred, int f_code)
72 {
73  int code, val, sign, shift;
74 
75  code = get_vlc2(&s->gb, v2_mv_vlc.table, V2_MV_VLC_BITS, 2);
76  av_dlog(s, "MV code %d at %d %d pred: %d\n", code, s->mb_x,s->mb_y, pred);
77  if (code < 0)
78  return 0xffff;
79 
80  if (code == 0)
81  return pred;
82  sign = get_bits1(&s->gb);
83  shift = f_code - 1;
84  val = code;
85  if (shift) {
86  val = (val - 1) << shift;
87  val |= get_bits(&s->gb, shift);
88  val++;
89  }
90  if (sign)
91  val = -val;
92 
93  val += pred;
94  if (val <= -64)
95  val += 64;
96  else if (val >= 64)
97  val -= 64;
98 
99  return val;
100 }
101 
102 static int msmpeg4v12_decode_mb(MpegEncContext *s, int16_t block[6][64])
103 {
104  int cbp, code, i;
105 
106  if (s->pict_type == AV_PICTURE_TYPE_P) {
107  if (s->use_skip_mb_code) {
108  if (get_bits1(&s->gb)) {
109  /* skip mb */
110  s->mb_intra = 0;
111  for(i=0;i<6;i++)
112  s->block_last_index[i] = -1;
113  s->mv_dir = MV_DIR_FORWARD;
114  s->mv_type = MV_TYPE_16X16;
115  s->mv[0][0][0] = 0;
116  s->mv[0][0][1] = 0;
117  s->mb_skipped = 1;
118  return 0;
119  }
120  }
121 
122  if(s->msmpeg4_version==2)
123  code = get_vlc2(&s->gb, v2_mb_type_vlc.table, V2_MB_TYPE_VLC_BITS, 1);
124  else
126  if(code<0 || code>7){
127  av_log(s->avctx, AV_LOG_ERROR, "cbpc %d invalid at %d %d\n", code, s->mb_x, s->mb_y);
128  return -1;
129  }
130 
131  s->mb_intra = code >>2;
132 
133  cbp = code & 0x3;
134  } else {
135  s->mb_intra = 1;
136  if(s->msmpeg4_version==2)
137  cbp= get_vlc2(&s->gb, v2_intra_cbpc_vlc.table, V2_INTRA_CBPC_VLC_BITS, 1);
138  else
140  if(cbp<0 || cbp>3){
141  av_log(s->avctx, AV_LOG_ERROR, "cbpc %d invalid at %d %d\n", cbp, s->mb_x, s->mb_y);
142  return -1;
143  }
144  }
145 
146  if (!s->mb_intra) {
147  int mx, my, cbpy;
148 
150  if(cbpy<0){
151  av_log(s->avctx, AV_LOG_ERROR, "cbpy %d invalid at %d %d\n", cbp, s->mb_x, s->mb_y);
152  return -1;
153  }
154 
155  cbp|= cbpy<<2;
156  if(s->msmpeg4_version==1 || (cbp&3) != 3) cbp^= 0x3C;
157 
158  ff_h263_pred_motion(s, 0, 0, &mx, &my);
159  mx= msmpeg4v2_decode_motion(s, mx, 1);
160  my= msmpeg4v2_decode_motion(s, my, 1);
161 
162  s->mv_dir = MV_DIR_FORWARD;
163  s->mv_type = MV_TYPE_16X16;
164  s->mv[0][0][0] = mx;
165  s->mv[0][0][1] = my;
166  } else {
167  if(s->msmpeg4_version==2){
168  s->ac_pred = get_bits1(&s->gb);
169  cbp|= get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1)<<2; //FIXME check errors
170  } else{
171  s->ac_pred = 0;
172  cbp|= get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1)<<2; //FIXME check errors
173  if(s->pict_type==AV_PICTURE_TYPE_P) cbp^=0x3C;
174  }
175  }
176 
177  s->bdsp.clear_blocks(s->block[0]);
178  for (i = 0; i < 6; i++) {
179  if (ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0)
180  {
181  av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
182  return -1;
183  }
184  }
185  return 0;
186 }
187 
188 static int msmpeg4v34_decode_mb(MpegEncContext *s, int16_t block[6][64])
189 {
190  int cbp, code, i;
191  uint8_t *coded_val;
192  uint32_t * const mb_type_ptr = &s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride];
193 
194  if (s->pict_type == AV_PICTURE_TYPE_P) {
195  if (s->use_skip_mb_code) {
196  if (get_bits1(&s->gb)) {
197  /* skip mb */
198  s->mb_intra = 0;
199  for(i=0;i<6;i++)
200  s->block_last_index[i] = -1;
201  s->mv_dir = MV_DIR_FORWARD;
202  s->mv_type = MV_TYPE_16X16;
203  s->mv[0][0][0] = 0;
204  s->mv[0][0][1] = 0;
205  s->mb_skipped = 1;
206  *mb_type_ptr = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
207 
208  return 0;
209  }
210  }
211 
212  code = get_vlc2(&s->gb, ff_mb_non_intra_vlc[DEFAULT_INTER_INDEX].table, MB_NON_INTRA_VLC_BITS, 3);
213  if (code < 0)
214  return -1;
215  //s->mb_intra = (code & 0x40) ? 0 : 1;
216  s->mb_intra = (~code & 0x40) >> 6;
217 
218  cbp = code & 0x3f;
219  } else {
220  s->mb_intra = 1;
222  if (code < 0)
223  return -1;
224  /* predict coded block pattern */
225  cbp = 0;
226  for(i=0;i<6;i++) {
227  int val = ((code >> (5 - i)) & 1);
228  if (i < 4) {
229  int pred = ff_msmpeg4_coded_block_pred(s, i, &coded_val);
230  val = val ^ pred;
231  *coded_val = val;
232  }
233  cbp |= val << (5 - i);
234  }
235  }
236 
237  if (!s->mb_intra) {
238  int mx, my;
239  if(s->per_mb_rl_table && cbp){
240  s->rl_table_index = decode012(&s->gb);
242  }
243  ff_h263_pred_motion(s, 0, 0, &mx, &my);
244  if (ff_msmpeg4_decode_motion(s, &mx, &my) < 0)
245  return -1;
246  s->mv_dir = MV_DIR_FORWARD;
247  s->mv_type = MV_TYPE_16X16;
248  s->mv[0][0][0] = mx;
249  s->mv[0][0][1] = my;
250  *mb_type_ptr = MB_TYPE_L0 | MB_TYPE_16x16;
251  } else {
252  av_dlog(s, "I at %d %d %d %06X\n", s->mb_x, s->mb_y,
253  ((cbp & 3) ? 1 : 0) +((cbp & 0x3C)? 2 : 0),
254  show_bits(&s->gb, 24));
255  s->ac_pred = get_bits1(&s->gb);
256  *mb_type_ptr = MB_TYPE_INTRA;
257  if(s->inter_intra_pred){
258  s->h263_aic_dir= get_vlc2(&s->gb, ff_inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1);
259  av_dlog(s, "%d%d %d %d/",
260  s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
261  }
262  if(s->per_mb_rl_table && cbp){
263  s->rl_table_index = decode012(&s->gb);
265  }
266  }
267 
268  s->bdsp.clear_blocks(s->block[0]);
269  for (i = 0; i < 6; i++) {
270  if (ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0)
271  {
272  av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
273  return -1;
274  }
275  }
276 
277  return 0;
278 }
279 
280 /* init all vlc decoding tables */
282 {
283  MpegEncContext *s = avctx->priv_data;
284  static int done = 0;
285  int i;
286  MVTable *mv;
287 
288  if (ff_h263_decode_init(avctx) < 0)
289  return -1;
290 
292 
293  if (!done) {
294  done = 1;
295 
296  for(i=0;i<NB_RL_TABLES;i++) {
298  }
299  INIT_VLC_RL(ff_rl_table[0], 642);
300  INIT_VLC_RL(ff_rl_table[1], 1104);
301  INIT_VLC_RL(ff_rl_table[2], 554);
302  INIT_VLC_RL(ff_rl_table[3], 940);
303  INIT_VLC_RL(ff_rl_table[4], 962);
304  INIT_VLC_RL(ff_rl_table[5], 554);
305 
306  mv = &ff_mv_tables[0];
307  INIT_VLC_STATIC(&mv->vlc, MV_VLC_BITS, mv->n + 1,
308  mv->table_mv_bits, 1, 1,
309  mv->table_mv_code, 2, 2, 3714);
310  mv = &ff_mv_tables[1];
311  INIT_VLC_STATIC(&mv->vlc, MV_VLC_BITS, mv->n + 1,
312  mv->table_mv_bits, 1, 1,
313  mv->table_mv_code, 2, 2, 2694);
314 
316  &ff_table0_dc_lum[0][1], 8, 4,
317  &ff_table0_dc_lum[0][0], 8, 4, 1158);
319  &ff_table0_dc_chroma[0][1], 8, 4,
320  &ff_table0_dc_chroma[0][0], 8, 4, 1118);
322  &ff_table1_dc_lum[0][1], 8, 4,
323  &ff_table1_dc_lum[0][0], 8, 4, 1476);
325  &ff_table1_dc_chroma[0][1], 8, 4,
326  &ff_table1_dc_chroma[0][0], 8, 4, 1216);
327 
328  INIT_VLC_STATIC(&v2_dc_lum_vlc, DC_VLC_BITS, 512,
329  &ff_v2_dc_lum_table[0][1], 8, 4,
330  &ff_v2_dc_lum_table[0][0], 8, 4, 1472);
331  INIT_VLC_STATIC(&v2_dc_chroma_vlc, DC_VLC_BITS, 512,
332  &ff_v2_dc_chroma_table[0][1], 8, 4,
333  &ff_v2_dc_chroma_table[0][0], 8, 4, 1506);
334 
335  INIT_VLC_STATIC(&v2_intra_cbpc_vlc, V2_INTRA_CBPC_VLC_BITS, 4,
336  &ff_v2_intra_cbpc[0][1], 2, 1,
337  &ff_v2_intra_cbpc[0][0], 2, 1, 8);
338  INIT_VLC_STATIC(&v2_mb_type_vlc, V2_MB_TYPE_VLC_BITS, 8,
339  &ff_v2_mb_type[0][1], 2, 1,
340  &ff_v2_mb_type[0][0], 2, 1, 128);
341  INIT_VLC_STATIC(&v2_mv_vlc, V2_MV_VLC_BITS, 33,
342  &ff_mvtab[0][1], 2, 1,
343  &ff_mvtab[0][0], 2, 1, 538);
344 
345  INIT_VLC_STATIC(&ff_mb_non_intra_vlc[0], MB_NON_INTRA_VLC_BITS, 128,
346  &ff_wmv2_inter_table[0][0][1], 8, 4,
347  &ff_wmv2_inter_table[0][0][0], 8, 4, 1636);
348  INIT_VLC_STATIC(&ff_mb_non_intra_vlc[1], MB_NON_INTRA_VLC_BITS, 128,
349  &ff_wmv2_inter_table[1][0][1], 8, 4,
350  &ff_wmv2_inter_table[1][0][0], 8, 4, 2648);
351  INIT_VLC_STATIC(&ff_mb_non_intra_vlc[2], MB_NON_INTRA_VLC_BITS, 128,
352  &ff_wmv2_inter_table[2][0][1], 8, 4,
353  &ff_wmv2_inter_table[2][0][0], 8, 4, 1532);
354  INIT_VLC_STATIC(&ff_mb_non_intra_vlc[3], MB_NON_INTRA_VLC_BITS, 128,
355  &ff_wmv2_inter_table[3][0][1], 8, 4,
356  &ff_wmv2_inter_table[3][0][0], 8, 4, 2488);
357 
359  &ff_msmp4_mb_i_table[0][1], 4, 2,
360  &ff_msmp4_mb_i_table[0][0], 4, 2, 536);
361 
362  INIT_VLC_STATIC(&ff_inter_intra_vlc, INTER_INTRA_VLC_BITS, 4,
363  &ff_table_inter_intra[0][1], 2, 1,
364  &ff_table_inter_intra[0][0], 2, 1, 8);
365  }
366 
367  switch(s->msmpeg4_version){
368  case 1:
369  case 2:
371  break;
372  case 3:
373  case 4:
375  break;
376  case 5:
379  case 6:
380  //FIXME + TODO VC1 decode mb
381  break;
382  }
383 
384  s->slice_height= s->mb_height; //to avoid 1/0 if the first frame is not a keyframe
385 
386  return 0;
387 }
388 
390 {
391  int code;
392 
393  if(s->msmpeg4_version==1){
394  int start_code = get_bits_long(&s->gb, 32);
395  if(start_code!=0x00000100){
396  av_log(s->avctx, AV_LOG_ERROR, "invalid startcode\n");
397  return -1;
398  }
399 
400  skip_bits(&s->gb, 5); // frame number */
401  }
402 
403  s->pict_type = get_bits(&s->gb, 2) + 1;
404  if (s->pict_type != AV_PICTURE_TYPE_I &&
406  av_log(s->avctx, AV_LOG_ERROR, "invalid picture type\n");
407  return -1;
408  }
409 #if 0
410 {
411  static int had_i=0;
412  if(s->pict_type == AV_PICTURE_TYPE_I) had_i=1;
413  if(!had_i) return -1;
414 }
415 #endif
416  s->chroma_qscale= s->qscale = get_bits(&s->gb, 5);
417  if(s->qscale==0){
418  av_log(s->avctx, AV_LOG_ERROR, "invalid qscale\n");
419  return -1;
420  }
421 
422  if (s->pict_type == AV_PICTURE_TYPE_I) {
423  code = get_bits(&s->gb, 5);
424  if(s->msmpeg4_version==1){
425  if(code==0 || code>s->mb_height){
426  av_log(s->avctx, AV_LOG_ERROR, "invalid slice height %d\n", code);
427  return -1;
428  }
429 
430  s->slice_height = code;
431  }else{
432  /* 0x17: one slice, 0x18: two slices, ... */
433  if (code < 0x17){
434  av_log(s->avctx, AV_LOG_ERROR, "error, slice code was %X\n", code);
435  return -1;
436  }
437 
438  s->slice_height = s->mb_height / (code - 0x16);
439  }
440 
441  switch(s->msmpeg4_version){
442  case 1:
443  case 2:
444  s->rl_chroma_table_index = 2;
445  s->rl_table_index = 2;
446 
447  s->dc_table_index = 0; //not used
448  break;
449  case 3:
451  s->rl_table_index = decode012(&s->gb);
452 
453  s->dc_table_index = get_bits1(&s->gb);
454  break;
455  case 4:
456  ff_msmpeg4_decode_ext_header(s, (2+5+5+17+7)/8);
457 
459  else s->per_mb_rl_table= 0;
460 
461  if(!s->per_mb_rl_table){
463  s->rl_table_index = decode012(&s->gb);
464  }
465 
466  s->dc_table_index = get_bits1(&s->gb);
467  s->inter_intra_pred= 0;
468  break;
469  }
470  s->no_rounding = 1;
472  av_log(s->avctx, AV_LOG_DEBUG, "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d slice:%d \n",
473  s->qscale,
475  s->rl_table_index,
476  s->dc_table_index,
477  s->per_mb_rl_table,
478  s->slice_height);
479  } else {
480  switch(s->msmpeg4_version){
481  case 1:
482  case 2:
483  if(s->msmpeg4_version==1)
484  s->use_skip_mb_code = 1;
485  else
486  s->use_skip_mb_code = get_bits1(&s->gb);
487  s->rl_table_index = 2;
489  s->dc_table_index = 0; //not used
490  s->mv_table_index = 0;
491  break;
492  case 3:
493  s->use_skip_mb_code = get_bits1(&s->gb);
494  s->rl_table_index = decode012(&s->gb);
496 
497  s->dc_table_index = get_bits1(&s->gb);
498 
499  s->mv_table_index = get_bits1(&s->gb);
500  break;
501  case 4:
502  s->use_skip_mb_code = get_bits1(&s->gb);
503 
505  else s->per_mb_rl_table= 0;
506 
507  if(!s->per_mb_rl_table){
508  s->rl_table_index = decode012(&s->gb);
510  }
511 
512  s->dc_table_index = get_bits1(&s->gb);
513 
514  s->mv_table_index = get_bits1(&s->gb);
515  s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
516  break;
517  }
518 
520  av_log(s->avctx, AV_LOG_DEBUG, "skip:%d rl:%d rlc:%d dc:%d mv:%d mbrl:%d qp:%d \n",
521  s->use_skip_mb_code,
522  s->rl_table_index,
524  s->dc_table_index,
525  s->mv_table_index,
526  s->per_mb_rl_table,
527  s->qscale);
528 
529  if(s->flipflop_rounding){
530  s->no_rounding ^= 1;
531  }else{
532  s->no_rounding = 0;
533  }
534  }
535  av_dlog(s->avctx, "%d %d %d %d %d\n", s->pict_type, s->bit_rate,
536  s->inter_intra_pred, s->width, s->height);
537 
538  s->esc3_level_length= 0;
539  s->esc3_run_length= 0;
540 
541  return 0;
542 }
543 
545 {
546  int left= buf_size*8 - get_bits_count(&s->gb);
547  int length= s->msmpeg4_version>=3 ? 17 : 16;
548  /* the alt_bitstream reader could read over the end so we need to check it */
549  if(left>=length && left<length+8)
550  {
551  skip_bits(&s->gb, 5); /* fps */
552  s->bit_rate= get_bits(&s->gb, 11)*1024;
553  if(s->msmpeg4_version>=3)
554  s->flipflop_rounding= get_bits1(&s->gb);
555  else
556  s->flipflop_rounding= 0;
557  }
558  else if(left<length+8)
559  {
560  s->flipflop_rounding= 0;
561  if(s->msmpeg4_version != 2)
562  av_log(s->avctx, AV_LOG_ERROR, "ext header missing, %d left\n", left);
563  }
564  else
565  {
566  av_log(s->avctx, AV_LOG_ERROR, "I frame too long, ignoring ext header\n");
567  }
568 
569  return 0;
570 }
571 
572 static int msmpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr)
573 {
574  int level, pred;
575 
576  if(s->msmpeg4_version<=2){
577  if (n < 4) {
578  level = get_vlc2(&s->gb, v2_dc_lum_vlc.table, DC_VLC_BITS, 3);
579  } else {
580  level = get_vlc2(&s->gb, v2_dc_chroma_vlc.table, DC_VLC_BITS, 3);
581  }
582  if (level < 0)
583  return -1;
584  level-=256;
585  }else{ //FIXME optimize use unified tables & index
586  if (n < 4) {
588  } else {
590  }
591  if (level < 0){
592  av_log(s->avctx, AV_LOG_ERROR, "illegal dc vlc\n");
593  return -1;
594  }
595 
596  if (level == DC_MAX) {
597  level = get_bits(&s->gb, 8);
598  if (get_bits1(&s->gb))
599  level = -level;
600  } else if (level != 0) {
601  if (get_bits1(&s->gb))
602  level = -level;
603  }
604  }
605 
606  if(s->msmpeg4_version==1){
607  int32_t *dc_val;
608  pred = msmpeg4v1_pred_dc(s, n, &dc_val);
609  level += pred;
610 
611  /* update predictor */
612  *dc_val= level;
613  }else{
614  int16_t *dc_val;
615  pred = ff_msmpeg4_pred_dc(s, n, &dc_val, dir_ptr);
616  level += pred;
617 
618  /* update predictor */
619  if (n < 4) {
620  *dc_val = level * s->y_dc_scale;
621  } else {
622  *dc_val = level * s->c_dc_scale;
623  }
624  }
625 
626  return level;
627 }
628 
629 //#define ERROR_DETAILS
631  int n, int coded, const uint8_t *scan_table)
632 {
633  int level, i, last, run, run_diff;
634  int av_uninit(dc_pred_dir);
635  RLTable *rl;
636  RL_VLC_ELEM *rl_vlc;
637  int qmul, qadd;
638 
639  if (s->mb_intra) {
640  qmul=1;
641  qadd=0;
642 
643  /* DC coef */
644  level = msmpeg4_decode_dc(s, n, &dc_pred_dir);
645 
646  if (level < 0){
647  av_log(s->avctx, AV_LOG_ERROR, "dc overflow- block: %d qscale: %d//\n", n, s->qscale);
648  if(s->inter_intra_pred) level=0;
649  else return -1;
650  }
651  if (n < 4) {
652  rl = &ff_rl_table[s->rl_table_index];
653  if(level > 256*s->y_dc_scale){
654  av_log(s->avctx, AV_LOG_ERROR, "dc overflow+ L qscale: %d//\n", s->qscale);
655  if(!s->inter_intra_pred) return -1;
656  }
657  } else {
658  rl = &ff_rl_table[3 + s->rl_chroma_table_index];
659  if(level > 256*s->c_dc_scale){
660  av_log(s->avctx, AV_LOG_ERROR, "dc overflow+ C qscale: %d//\n", s->qscale);
661  if(!s->inter_intra_pred) return -1;
662  }
663  }
664  block[0] = level;
665 
666  run_diff = s->msmpeg4_version >= 4;
667  i = 0;
668  if (!coded) {
669  goto not_coded;
670  }
671  if (s->ac_pred) {
672  if (dc_pred_dir == 0)
673  scan_table = s->intra_v_scantable.permutated; /* left */
674  else
675  scan_table = s->intra_h_scantable.permutated; /* top */
676  } else {
677  scan_table = s->intra_scantable.permutated;
678  }
679  rl_vlc= rl->rl_vlc[0];
680  } else {
681  qmul = s->qscale << 1;
682  qadd = (s->qscale - 1) | 1;
683  i = -1;
684  rl = &ff_rl_table[3 + s->rl_table_index];
685 
686  if(s->msmpeg4_version==2)
687  run_diff = 0;
688  else
689  run_diff = 1;
690 
691  if (!coded) {
692  s->block_last_index[n] = i;
693  return 0;
694  }
695  if(!scan_table)
696  scan_table = s->inter_scantable.permutated;
697  rl_vlc= rl->rl_vlc[s->qscale];
698  }
699  {
700  OPEN_READER(re, &s->gb);
701  for(;;) {
702  UPDATE_CACHE(re, &s->gb);
703  GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 0);
704  if (level==0) {
705  int cache;
706  cache= GET_CACHE(re, &s->gb);
707  /* escape */
708  if (s->msmpeg4_version==1 || (cache&0x80000000)==0) {
709  if (s->msmpeg4_version==1 || (cache&0x40000000)==0) {
710  /* third escape */
711  if(s->msmpeg4_version!=1) LAST_SKIP_BITS(re, &s->gb, 2);
712  UPDATE_CACHE(re, &s->gb);
713  if(s->msmpeg4_version<=3){
714  last= SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1);
715  run= SHOW_UBITS(re, &s->gb, 6); SKIP_CACHE(re, &s->gb, 6);
716  level= SHOW_SBITS(re, &s->gb, 8);
717  SKIP_COUNTER(re, &s->gb, 1+6+8);
718  }else{
719  int sign;
720  last= SHOW_UBITS(re, &s->gb, 1); SKIP_BITS(re, &s->gb, 1);
721  if(!s->esc3_level_length){
722  int ll;
723  av_dlog(s->avctx, "ESC-3 %X at %d %d\n",
724  show_bits(&s->gb, 24), s->mb_x, s->mb_y);
725  if(s->qscale<8){
726  ll= SHOW_UBITS(re, &s->gb, 3); SKIP_BITS(re, &s->gb, 3);
727  if(ll==0){
728  ll= 8+SHOW_UBITS(re, &s->gb, 1); SKIP_BITS(re, &s->gb, 1);
729  }
730  }else{
731  ll=2;
732  while(ll<8 && SHOW_UBITS(re, &s->gb, 1)==0){
733  ll++;
734  SKIP_BITS(re, &s->gb, 1);
735  }
736  if(ll<8) SKIP_BITS(re, &s->gb, 1);
737  }
738 
739  s->esc3_level_length= ll;
740  s->esc3_run_length= SHOW_UBITS(re, &s->gb, 2) + 3; SKIP_BITS(re, &s->gb, 2);
741  UPDATE_CACHE(re, &s->gb);
742  }
743  run= SHOW_UBITS(re, &s->gb, s->esc3_run_length);
744  SKIP_BITS(re, &s->gb, s->esc3_run_length);
745 
746  sign= SHOW_UBITS(re, &s->gb, 1);
747  SKIP_BITS(re, &s->gb, 1);
748 
749  level= SHOW_UBITS(re, &s->gb, s->esc3_level_length);
750  SKIP_BITS(re, &s->gb, s->esc3_level_length);
751  if(sign) level= -level;
752  }
753 
754 #if 0 // waste of time / this will detect very few errors
755  {
756  const int abs_level= FFABS(level);
757  const int run1= run - rl->max_run[last][abs_level] - run_diff;
758  if(abs_level<=MAX_LEVEL && run<=MAX_RUN){
759  if(abs_level <= rl->max_level[last][run]){
760  av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, vlc encoding possible\n");
761  return DECODING_AC_LOST;
762  }
763  if(abs_level <= rl->max_level[last][run]*2){
764  av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 1 encoding possible\n");
765  return DECODING_AC_LOST;
766  }
767  if(run1>=0 && abs_level <= rl->max_level[last][run1]){
768  av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 2 encoding possible\n");
769  return DECODING_AC_LOST;
770  }
771  }
772  }
773 #endif
774  //level = level * qmul + (level>0) * qadd - (level<=0) * qadd ;
775  if (level>0) level= level * qmul + qadd;
776  else level= level * qmul - qadd;
777 #if 0 // waste of time too :(
778  if(level>2048 || level<-2048){
779  av_log(s->avctx, AV_LOG_ERROR, "|level| overflow in 3. esc\n");
780  return DECODING_AC_LOST;
781  }
782 #endif
783  i+= run + 1;
784  if(last) i+=192;
785 #ifdef ERROR_DETAILS
786  if(run==66)
787  av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code in ESC3 level=%d\n", level);
788  else if((i>62 && i<192) || i>192+63)
789  av_log(s->avctx, AV_LOG_ERROR, "run overflow in ESC3 i=%d run=%d level=%d\n", i, run, level);
790 #endif
791  } else {
792  /* second escape */
793  SKIP_BITS(re, &s->gb, 2);
794  GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1);
795  i+= run + rl->max_run[run>>7][level/qmul] + run_diff; //FIXME opt indexing
796  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
797  LAST_SKIP_BITS(re, &s->gb, 1);
798 #ifdef ERROR_DETAILS
799  if(run==66)
800  av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code in ESC2 level=%d\n", level);
801  else if((i>62 && i<192) || i>192+63)
802  av_log(s->avctx, AV_LOG_ERROR, "run overflow in ESC2 i=%d run=%d level=%d\n", i, run, level);
803 #endif
804  }
805  } else {
806  /* first escape */
807  SKIP_BITS(re, &s->gb, 1);
808  GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1);
809  i+= run;
810  level = level + rl->max_level[run>>7][(run-1)&63] * qmul;//FIXME opt indexing
811  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
812  LAST_SKIP_BITS(re, &s->gb, 1);
813 #ifdef ERROR_DETAILS
814  if(run==66)
815  av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code in ESC1 level=%d\n", level);
816  else if((i>62 && i<192) || i>192+63)
817  av_log(s->avctx, AV_LOG_ERROR, "run overflow in ESC1 i=%d run=%d level=%d\n", i, run, level);
818 #endif
819  }
820  } else {
821  i+= run;
822  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
823  LAST_SKIP_BITS(re, &s->gb, 1);
824 #ifdef ERROR_DETAILS
825  if(run==66)
826  av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code level=%d\n", level);
827  else if((i>62 && i<192) || i>192+63)
828  av_log(s->avctx, AV_LOG_ERROR, "run overflow i=%d run=%d level=%d\n", i, run, level);
829 #endif
830  }
831  if (i > 62){
832  i-= 192;
833  if(i&(~63)){
834  const int left= get_bits_left(&s->gb);
835  if(((i+192 == 64 && level/qmul==-1) || !(s->err_recognition&AV_EF_BITSTREAM)) && left>=0){
836  av_log(s->avctx, AV_LOG_ERROR, "ignoring overflow at %d %d\n", s->mb_x, s->mb_y);
837  break;
838  }else{
839  av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
840  return -1;
841  }
842  }
843 
844  block[scan_table[i]] = level;
845  break;
846  }
847 
848  block[scan_table[i]] = level;
849  }
850  CLOSE_READER(re, &s->gb);
851  }
852  not_coded:
853  if (s->mb_intra) {
854  ff_mpeg4_pred_ac(s, block, n, dc_pred_dir);
855  if (s->ac_pred) {
856  i = 63; /* XXX: not optimal */
857  }
858  }
859  if(s->msmpeg4_version>=4 && i>0) i=63; //FIXME/XXX optimize
860  s->block_last_index[n] = i;
861 
862  return 0;
863 }
864 
866  int *mx_ptr, int *my_ptr)
867 {
868  MVTable *mv;
869  int code, mx, my;
870 
871  mv = &ff_mv_tables[s->mv_table_index];
872 
873  code = get_vlc2(&s->gb, mv->vlc.table, MV_VLC_BITS, 2);
874  if (code < 0){
875  av_log(s->avctx, AV_LOG_ERROR, "illegal MV code at %d %d\n", s->mb_x, s->mb_y);
876  return -1;
877  }
878  if (code == mv->n) {
879  mx = get_bits(&s->gb, 6);
880  my = get_bits(&s->gb, 6);
881  } else {
882  mx = mv->table_mvx[code];
883  my = mv->table_mvy[code];
884  }
885 
886  mx += *mx_ptr - 32;
887  my += *my_ptr - 32;
888  /* WARNING : they do not do exactly modulo encoding */
889  if (mx <= -64)
890  mx += 64;
891  else if (mx >= 64)
892  mx -= 64;
893 
894  if (my <= -64)
895  my += 64;
896  else if (my >= 64)
897  my -= 64;
898  *mx_ptr = mx;
899  *my_ptr = my;
900  return 0;
901 }
902 
904  .name = "msmpeg4v1",
905  .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2 Microsoft variant version 1"),
906  .type = AVMEDIA_TYPE_VIDEO,
907  .id = AV_CODEC_ID_MSMPEG4V1,
908  .priv_data_size = sizeof(MpegEncContext),
912  .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
913  .pix_fmts = (const enum AVPixelFormat[]) {
916  },
917 };
918 
920  .name = "msmpeg4v2",
921  .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2 Microsoft variant version 2"),
922  .type = AVMEDIA_TYPE_VIDEO,
923  .id = AV_CODEC_ID_MSMPEG4V2,
924  .priv_data_size = sizeof(MpegEncContext),
928  .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
929  .pix_fmts = (const enum AVPixelFormat[]) {
932  },
933 };
934 
936  .name = "msmpeg4",
937  .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2 Microsoft variant version 3"),
938  .type = AVMEDIA_TYPE_VIDEO,
939  .id = AV_CODEC_ID_MSMPEG4V3,
940  .priv_data_size = sizeof(MpegEncContext),
944  .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
945  .pix_fmts = (const enum AVPixelFormat[]) {
948  },
949 };
950 
952  .name = "wmv1",
953  .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 7"),
954  .type = AVMEDIA_TYPE_VIDEO,
955  .id = AV_CODEC_ID_WMV1,
956  .priv_data_size = sizeof(MpegEncContext),
960  .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
961  .pix_fmts = (const enum AVPixelFormat[]) {
964  },
965 };
static VLC v2_mv_vlc
Definition: msmpeg4dec.c:67
#define DEFAULT_INTER_INDEX
Definition: msmpeg4dec.c:42
int inter_intra_pred
Definition: mpegvideo.h:554
#define MB_TYPE_SKIP
Definition: avcodec.h:786
ScanTable intra_v_scantable
Definition: mpegvideo.h:216
#define V2_MV_VLC_BITS
Definition: msmpeg4dec.c:39
static int msmpeg4v2_decode_motion(MpegEncContext *s, int pred, int f_code)
Definition: msmpeg4dec.c:71
int esc3_level_length
Definition: mpegvideo.h:550
VLC ff_mb_non_intra_vlc[4]
Definition: msmpeg4dec.c:62
VLC ff_inter_intra_vlc
Definition: msmpeg4dec.c:68
#define CBPY_VLC_BITS
Definition: h263.h:39
uint32_t ff_v2_dc_lum_table[512][2]
Definition: msmpeg4data.c:34
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:240
const uint32_t ff_table0_dc_lum[120][2]
Definition: msmpeg4data.c:100
VLC ff_h263_intra_MCBPC_vlc
Definition: ituh263dec.c:92
static VLC v2_dc_lum_vlc
Definition: msmpeg4dec.c:63
uint32_t ff_v2_dc_chroma_table[512][2]
Definition: msmpeg4data.c:35
VLC ff_h263_cbpy_vlc
Definition: ituh263dec.c:94
#define SKIP_COUNTER(name, gb, num)
Definition: get_bits.h:170
int msmpeg4_version
0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
Definition: mpegvideo.h:548
#define MB_TYPE_INTRA
Definition: mpegutils.h:69
static VLC v2_dc_chroma_vlc
Definition: msmpeg4dec.c:64
#define TEX_VLC_BITS
Definition: msmpeg4dec.c:40
#define AV_EF_BITSTREAM
Definition: avcodec.h:2415
mpegvideo header.
av_dlog(ac->avr,"%d samples - audio_convert: %s to %s (%s)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic?ac->func_descr_generic:ac->func_descr)
#define NB_RL_TABLES
Definition: msmpeg4data.h:59
uint8_t permutated[64]
Definition: idctdsp.h:31
uint8_t run
Definition: svq3.c:146
AVCodec.
Definition: avcodec.h:2796
#define MB_NON_INTRA_VLC_BITS
Definition: msmpeg4.h:34
RLTable.
Definition: rl.h:38
int qscale
QP.
Definition: mpegvideo.h:332
av_cold void ff_msmpeg4_common_init(MpegEncContext *s)
Definition: msmpeg4.c:104
int16_t * ff_h263_pred_motion(MpegEncContext *s, int block, int dir, int *px, int *py)
Definition: h263.c:313
int esc3_run_length
Definition: mpegvideo.h:551
int8_t * max_run[2]
encoding & decoding
Definition: rl.h:46
VC-1 tables.
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
Definition: mimic.c:275
const uint8_t ff_v2_intra_cbpc[4][2]
Definition: msmpeg4data.c:1807
uint8_t
#define av_cold
Definition: attributes.h:66
int ff_msmpeg4_decode_block(MpegEncContext *s, int16_t *block, int n, int coded, const uint8_t *scan_table)
Definition: msmpeg4dec.c:630
#define INIT_VLC_STATIC(vlc, bits, a, b, c, d, e, f, g, static_size)
Definition: get_bits.h:443
uint8_t ff_static_rl_table_store[NB_RL_TABLES][2][2 *MAX_RUN+MAX_LEVEL+3]
Definition: msmpeg4data.c:36
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:2363
const uint8_t ff_mvtab[33][2]
Definition: h263data.h:91
#define MBAC_BITRATE
Definition: msmpeg4.h:38
int no_rounding
apply no rounding to motion compensation (MPEG4, msmpeg4, ...) for b-frames rounding mode is always 0...
Definition: mpegvideo.h:406
static int msmpeg4v12_decode_mb(MpegEncContext *s, int16_t block[6][64])
Definition: msmpeg4dec.c:102
Picture current_picture
copy of the current picture structure.
Definition: mpegvideo.h:306
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:684
MSMPEG4 data tables.
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:194
int8_t * max_level[2]
encoding & decoding
Definition: rl.h:45
const uint32_t ff_table0_dc_chroma[120][2]
Definition: msmpeg4data.c:133
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:255
static int msmpeg4v1_pred_dc(MpegEncContext *s, int n, int32_t **dc_val_ptr)
Definition: msmpeg4dec.c:44
#define MAX_LEVEL
Definition: rl.h:35
int flipflop_rounding
Definition: mpegvideo.h:547
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:555
#define UPDATE_CACHE(name, gb)
Definition: get_bits.h:161
const uint16_t ff_msmp4_mb_i_table[64][2]
Definition: msmpeg4data.c:43
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
int last_dc[3]
last DC values for MPEG1
Definition: mpegvideo.h:311
static int msmpeg4v34_decode_mb(MpegEncContext *s, int16_t block[6][64])
Definition: msmpeg4dec.c:188
int rl_chroma_table_index
Definition: mpegvideo.h:542
int ff_msmpeg4_decode_picture_header(MpegEncContext *s)
Definition: msmpeg4dec.c:389
int mb_skipped
MUST BE SET only during DECODING.
Definition: mpegvideo.h:321
void ff_mpeg4_pred_ac(MpegEncContext *s, int16_t *block, int n, int dir)
Predict the ac.
Definition: mpeg4videodec.c:57
void(* clear_blocks)(int16_t *blocks)
Definition: blockdsp.h:36
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:150
#define DC_VLC_BITS
Definition: msmpeg4dec.c:35
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:144
int per_mb_rl_table
Definition: mpegvideo.h:549
#define INTER_MCBPC_VLC_BITS
Definition: h263.h:38
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:169
const char * name
Name of the codec implementation.
Definition: avcodec.h:2803
#define CONFIG_WMV2_DECODER
Definition: config.h:610
GetBitContext gb
Definition: mpegvideo.h:558
#define CLOSE_READER(name, gb)
Definition: get_bits.h:141
#define INIT_VLC_RL(rl, static_size)
Definition: rl.h:59
#define V2_INTRA_CBPC_VLC_BITS
Definition: msmpeg4dec.c:36
#define GET_RL_VLC(level, run, name, gb, table, bits,max_depth, need_update)
Definition: get_bits.h:488
Definition: get_bits.h:64
#define SKIP_BITS(name, gb, num)
Definition: get_bits.h:176
int ff_h263_decode_init(AVCodecContext *avctx)
Definition: h263dec.c:43
VLC ff_h263_inter_MCBPC_vlc
Definition: ituh263dec.c:93
int err_recognition
Definition: mpegvideo.h:477
int ff_h263_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: h263dec.c:365
const uint8_t ff_v2_mb_type[8][2]
Definition: msmpeg4data.c:1802
int ff_msmpeg4_pred_dc(MpegEncContext *s, int n, int16_t **dc_val_ptr, int *dir_ptr)
Definition: msmpeg4.c:194
#define CODEC_CAP_DRAW_HORIZ_BAND
Decoder can use draw_horiz_band callback.
Definition: avcodec.h:678
const uint8_t * table_mvx
Definition: msmpeg4data.h:42
int32_t
const uint8_t * table_mv_bits
Definition: msmpeg4data.h:41
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:254
static int msmpeg4_decode_dc(MpegEncContext *s, int n, int *dir_ptr)
Definition: msmpeg4dec.c:572
#define FFABS(a)
Definition: common.h:52
#define LAST_SKIP_BITS(name, gb, num)
Definition: get_bits.h:182
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
Definition: get_bits.h:522
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:209
const uint32_t ff_table1_dc_chroma[120][2]
Definition: msmpeg4data.c:201
int(* decode_mb)(struct MpegEncContext *s, int16_t block[6][64])
Definition: mpegvideo.h:602
RL_VLC_ELEM * rl_vlc[32]
decoding only
Definition: rl.h:48
#define SHOW_UBITS(name, gb, num)
Definition: get_bits.h:188
int ff_msmpeg4_decode_ext_header(MpegEncContext *s, int buf_size)
Definition: msmpeg4dec.c:544
static const float pred[4]
Definition: siprdata.h:259
static const int8_t mv[256][2]
Definition: 4xm.c:75
AVCodec ff_msmpeg4v1_decoder
Definition: msmpeg4dec.c:903
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:388
NULL
Definition: eval.c:55
Libavcodec external API header.
BlockDSPContext bdsp
Definition: mpegvideo.h:351
int debug
debug
Definition: avcodec.h:2362
AVCodec ff_msmpeg4v2_decoder
Definition: msmpeg4dec.c:919
main external API structure.
Definition: avcodec.h:1050
static VLC v2_intra_cbpc_vlc
Definition: msmpeg4dec.c:65
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:490
ScanTable intra_scantable
Definition: mpegvideo.h:214
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:223
#define OPEN_READER(name, gb)
Definition: get_bits.h:127
const uint16_t * table_mv_code
Definition: msmpeg4data.h:40
#define DC_MAX
Definition: msmpeg4.h:40
const uint32_t ff_table1_dc_lum[120][2]
Definition: msmpeg4data.c:168
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:271
#define V2_MB_TYPE_VLC_BITS
Definition: msmpeg4dec.c:37
ScanTable intra_h_scantable
Definition: mpegvideo.h:215
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:263
#define GET_CACHE(name, gb)
Definition: get_bits.h:192
#define MB_INTRA_VLC_BITS
Definition: msmpeg4.h:35
int slice_height
in macroblocks
Definition: mpegvideo.h:545
#define MB_TYPE_16x16
Definition: avcodec.h:778
int use_skip_mb_code
Definition: mpegvideo.h:544
AVCodec ff_wmv1_decoder
Definition: msmpeg4dec.c:951
MVTable ff_mv_tables[2]
Definition: msmpeg4data.c:1785
#define SKIP_CACHE(name, gb, num)
Definition: get_bits.h:165
VLC vlc
Definition: msmpeg4data.h:45
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:304
#define MV_DIR_FORWARD
Definition: mpegvideo.h:384
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:339
int bit_rate
wanted bit rate
Definition: mpegvideo.h:226
#define II_BITRATE
Definition: msmpeg4.h:37
RLTable ff_rl_table[NB_RL_TABLES]
Definition: msmpeg4data.c:601
static VLC v2_mb_type_vlc
Definition: msmpeg4dec.c:66
uint8_t level
Definition: svq3.c:147
int mv[2][4][2]
motion vectors for a macroblock first coordinate : 0 = forward 1 = backward second " : depend...
Definition: mpegvideo.h:398
MpegEncContext.
Definition: mpegvideo.h:204
#define MAX_RUN
Definition: rl.h:34
struct AVCodecContext * avctx
Definition: mpegvideo.h:221
#define SHOW_SBITS(name, gb, num)
Definition: get_bits.h:189
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:65
int mb_stride
mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11 ...
Definition: mpegvideo.h:256
int ff_wmv2_decode_mb(MpegEncContext *s, int16_t block[6][64])
Definition: wmv2dec.c:334
AVCodec ff_msmpeg4v3_decoder
Definition: msmpeg4dec.c:935
#define MV_VLC_BITS
Definition: msmpeg4dec.c:38
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:499
int ff_h263_decode_end(AVCodecContext *avctx)
Definition: h263dec.c:129
const uint32_t(*const [WMV2_INTER_CBP_TABLE_COUNT] ff_wmv2_inter_table)[2]
Definition: msmpeg4data.c:1980
void * priv_data
Definition: avcodec.h:1092
float re
Definition: fft-test.c:69
av_cold void ff_init_rl(RLTable *rl, uint8_t static_store[2][2 *MAX_RUN+MAX_LEVEL+3])
Definition: mpegvideo.c:1528
int16_t(* block)[64]
points to one of the following blocks
Definition: mpegvideo.h:600
static int decode012(GetBitContext *gb)
Definition: get_bits.h:537
VLC_TYPE(* table)[2]
code, bits
Definition: get_bits.h:66
int ff_msmpeg4_decode_motion(MpegEncContext *s, int *mx_ptr, int *my_ptr)
Definition: msmpeg4dec.c:865
int rl_table_index
Definition: mpegvideo.h:541
int chroma_qscale
chroma QP
Definition: mpegvideo.h:333
#define av_uninit(x)
Definition: attributes.h:109
#define INTER_INTRA_VLC_BITS
Definition: msmpeg4.h:33
uint32_t * mb_type
types and macros are defined in mpegutils.h
Definition: mpegvideo.h:110
const uint8_t * table_mvy
Definition: msmpeg4data.h:43
VLC ff_msmp4_mb_i_vlc
Definition: msmpeg4data.c:38
ScanTable inter_scantable
if inter == intra then intra should be used to reduce tha cache usage
Definition: mpegvideo.h:213
int ff_msmpeg4_coded_block_pred(MpegEncContext *s, int n, uint8_t **coded_block_ptr)
Definition: msmpeg4.c:154
int mv_table_index
Definition: mpegvideo.h:540
int h263_aic_dir
AIC direction: 0 = left, 1 = top.
Definition: mpegvideo.h:491
AVPixelFormat
Pixel format.
Definition: pixfmt.h:63
const uint8_t ff_table_inter_intra[4][2]
Definition: msmpeg4data.c:1868
int dc_table_index
Definition: mpegvideo.h:543
VLC ff_msmp4_dc_luma_vlc[2]
Definition: msmpeg4data.c:39
#define MB_TYPE_L0
Definition: avcodec.h:791
Predicted.
Definition: avutil.h:254
#define INTRA_MCBPC_VLC_BITS
Definition: h263.h:37
av_cold int ff_msmpeg4_decode_init(AVCodecContext *avctx)
Definition: msmpeg4dec.c:281
VLC ff_msmp4_dc_chroma_vlc[2]
Definition: msmpeg4data.c:40
static int16_t block[64]
Definition: dct-test.c:88