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mpeg12dec.c
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1 /*
2  * MPEG-1/2 decoder
3  * Copyright (c) 2000, 2001 Fabrice Bellard
4  * Copyright (c) 2002-2013 Michael Niedermayer <michaelni@gmx.at>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * MPEG-1/2 decoder
26  */
27 
28 #define UNCHECKED_BITSTREAM_READER 1
29 #include <inttypes.h>
30 
31 #include "libavutil/attributes.h"
32 #include "libavutil/imgutils.h"
33 #include "libavutil/internal.h"
34 #include "libavutil/stereo3d.h"
35 
36 #include "avcodec.h"
37 #include "bytestream.h"
38 #include "error_resilience.h"
39 #include "idctdsp.h"
40 #include "internal.h"
41 #include "mpeg_er.h"
42 #include "mpeg12.h"
43 #include "mpeg12data.h"
44 #include "mpegutils.h"
45 #include "mpegvideo.h"
46 #include "mpegvideodata.h"
47 #include "profiles.h"
48 #include "thread.h"
49 #include "version.h"
50 #include "xvmc_internal.h"
51 
52 typedef struct Mpeg1Context {
54  int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
55  int repeat_field; /* true if we must repeat the field */
56  AVPanScan pan_scan; /* some temporary storage for the panscan */
62  int has_afd;
66  AVRational frame_rate_ext; /* MPEG-2 specific framerate modificator */
67  int sync; /* Did we reach a sync point like a GOP/SEQ/KEYFrame? */
68  int tmpgexs;
71 } Mpeg1Context;
72 
73 #define MB_TYPE_ZERO_MV 0x20000000
74 
75 static const uint32_t ptype2mb_type[7] = {
78  MB_TYPE_L0,
79  MB_TYPE_L0 | MB_TYPE_CBP,
82  MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
83 };
84 
85 static const uint32_t btype2mb_type[11] = {
87  MB_TYPE_L1,
88  MB_TYPE_L1 | MB_TYPE_CBP,
89  MB_TYPE_L0,
90  MB_TYPE_L0 | MB_TYPE_CBP,
92  MB_TYPE_L0L1 | MB_TYPE_CBP,
94  MB_TYPE_QUANT | MB_TYPE_L1 | MB_TYPE_CBP,
95  MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
96  MB_TYPE_QUANT | MB_TYPE_L0L1 | MB_TYPE_CBP,
97 };
98 
99 /* as H.263, but only 17 codes */
100 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
101 {
102  int code, sign, val, shift;
103 
104  code = get_vlc2(&s->gb, ff_mv_vlc.table, MV_VLC_BITS, 2);
105  if (code == 0)
106  return pred;
107  if (code < 0)
108  return 0xffff;
109 
110  sign = get_bits1(&s->gb);
111  shift = fcode - 1;
112  val = code;
113  if (shift) {
114  val = (val - 1) << shift;
115  val |= get_bits(&s->gb, shift);
116  val++;
117  }
118  if (sign)
119  val = -val;
120  val += pred;
121 
122  /* modulo decoding */
123  return sign_extend(val, 5 + shift);
124 }
125 
126 #define MAX_INDEX (64 - 1)
127 #define check_scantable_index(ctx, x) \
128  do { \
129  if ((x) > MAX_INDEX) { \
130  av_log(ctx->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", \
131  ctx->mb_x, ctx->mb_y); \
132  return AVERROR_INVALIDDATA; \
133  } \
134  } while (0)
135 
137  int16_t *block, int n)
138 {
139  int level, i, j, run;
140  RLTable *rl = &ff_rl_mpeg1;
141  uint8_t *const scantable = s->intra_scantable.permutated;
142  const uint16_t *quant_matrix = s->inter_matrix;
143  const int qscale = s->qscale;
144 
145  {
146  OPEN_READER(re, &s->gb);
147  i = -1;
148  // special case for first coefficient, no need to add second VLC table
149  UPDATE_CACHE(re, &s->gb);
150  if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
151  level = (3 * qscale * quant_matrix[0]) >> 5;
152  level = (level - 1) | 1;
153  if (GET_CACHE(re, &s->gb) & 0x40000000)
154  level = -level;
155  block[0] = level;
156  i++;
157  SKIP_BITS(re, &s->gb, 2);
158  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
159  goto end;
160  }
161  /* now quantify & encode AC coefficients */
162  for (;;) {
163  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
164  TEX_VLC_BITS, 2, 0);
165 
166  if (level != 0) {
167  i += run;
168  if (i > MAX_INDEX)
169  break;
170  j = scantable[i];
171  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
172  level = (level - 1) | 1;
173  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
174  SHOW_SBITS(re, &s->gb, 1);
175  SKIP_BITS(re, &s->gb, 1);
176  } else {
177  /* escape */
178  run = SHOW_UBITS(re, &s->gb, 6) + 1;
179  LAST_SKIP_BITS(re, &s->gb, 6);
180  UPDATE_CACHE(re, &s->gb);
181  level = SHOW_SBITS(re, &s->gb, 8);
182  SKIP_BITS(re, &s->gb, 8);
183  if (level == -128) {
184  level = SHOW_UBITS(re, &s->gb, 8) - 256;
185  SKIP_BITS(re, &s->gb, 8);
186  } else if (level == 0) {
187  level = SHOW_UBITS(re, &s->gb, 8);
188  SKIP_BITS(re, &s->gb, 8);
189  }
190  i += run;
191  if (i > MAX_INDEX)
192  break;
193  j = scantable[i];
194  if (level < 0) {
195  level = -level;
196  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
197  level = (level - 1) | 1;
198  level = -level;
199  } else {
200  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
201  level = (level - 1) | 1;
202  }
203  }
204 
205  block[j] = level;
206  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
207  break;
208  UPDATE_CACHE(re, &s->gb);
209  }
210 end:
211  LAST_SKIP_BITS(re, &s->gb, 2);
212  CLOSE_READER(re, &s->gb);
213  }
214 
215  check_scantable_index(s, i);
216 
217  s->block_last_index[n] = i;
218  return 0;
219 }
220 
221 /**
222  * Note: this function can read out of range and crash for corrupt streams.
223  * Changing this would eat up any speed benefits it has.
224  * Do not use "fast" flag if you need the code to be robust.
225  */
227  int16_t *block, int n)
228 {
229  int level, i, j, run;
230  RLTable *rl = &ff_rl_mpeg1;
231  uint8_t *const scantable = s->intra_scantable.permutated;
232  const int qscale = s->qscale;
233 
234  {
235  OPEN_READER(re, &s->gb);
236  i = -1;
237  // Special case for first coefficient, no need to add second VLC table.
238  UPDATE_CACHE(re, &s->gb);
239  if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
240  level = (3 * qscale) >> 1;
241  level = (level - 1) | 1;
242  if (GET_CACHE(re, &s->gb) & 0x40000000)
243  level = -level;
244  block[0] = level;
245  i++;
246  SKIP_BITS(re, &s->gb, 2);
247  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
248  goto end;
249  }
250 
251  /* now quantify & encode AC coefficients */
252  for (;;) {
253  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
254  TEX_VLC_BITS, 2, 0);
255 
256  if (level != 0) {
257  i += run;
258  if (i > MAX_INDEX)
259  break;
260  j = scantable[i];
261  level = ((level * 2 + 1) * qscale) >> 1;
262  level = (level - 1) | 1;
263  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
264  SHOW_SBITS(re, &s->gb, 1);
265  SKIP_BITS(re, &s->gb, 1);
266  } else {
267  /* escape */
268  run = SHOW_UBITS(re, &s->gb, 6) + 1;
269  LAST_SKIP_BITS(re, &s->gb, 6);
270  UPDATE_CACHE(re, &s->gb);
271  level = SHOW_SBITS(re, &s->gb, 8);
272  SKIP_BITS(re, &s->gb, 8);
273  if (level == -128) {
274  level = SHOW_UBITS(re, &s->gb, 8) - 256;
275  SKIP_BITS(re, &s->gb, 8);
276  } else if (level == 0) {
277  level = SHOW_UBITS(re, &s->gb, 8);
278  SKIP_BITS(re, &s->gb, 8);
279  }
280  i += run;
281  if (i > MAX_INDEX)
282  break;
283  j = scantable[i];
284  if (level < 0) {
285  level = -level;
286  level = ((level * 2 + 1) * qscale) >> 1;
287  level = (level - 1) | 1;
288  level = -level;
289  } else {
290  level = ((level * 2 + 1) * qscale) >> 1;
291  level = (level - 1) | 1;
292  }
293  }
294 
295  block[j] = level;
296  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
297  break;
298  UPDATE_CACHE(re, &s->gb);
299  }
300 end:
301  LAST_SKIP_BITS(re, &s->gb, 2);
302  CLOSE_READER(re, &s->gb);
303  }
304 
305  check_scantable_index(s, i);
306 
307  s->block_last_index[n] = i;
308  return 0;
309 }
310 
312  int16_t *block, int n)
313 {
314  int level, i, j, run;
315  RLTable *rl = &ff_rl_mpeg1;
316  uint8_t *const scantable = s->intra_scantable.permutated;
317  const uint16_t *quant_matrix;
318  const int qscale = s->qscale;
319  int mismatch;
320 
321  mismatch = 1;
322 
323  {
324  OPEN_READER(re, &s->gb);
325  i = -1;
326  if (n < 4)
327  quant_matrix = s->inter_matrix;
328  else
329  quant_matrix = s->chroma_inter_matrix;
330 
331  // Special case for first coefficient, no need to add second VLC table.
332  UPDATE_CACHE(re, &s->gb);
333  if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
334  level = (3 * qscale * quant_matrix[0]) >> 5;
335  if (GET_CACHE(re, &s->gb) & 0x40000000)
336  level = -level;
337  block[0] = level;
338  mismatch ^= level;
339  i++;
340  SKIP_BITS(re, &s->gb, 2);
341  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
342  goto end;
343  }
344 
345  /* now quantify & encode AC coefficients */
346  for (;;) {
347  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
348  TEX_VLC_BITS, 2, 0);
349 
350  if (level != 0) {
351  i += run;
352  if (i > MAX_INDEX)
353  break;
354  j = scantable[i];
355  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
356  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
357  SHOW_SBITS(re, &s->gb, 1);
358  SKIP_BITS(re, &s->gb, 1);
359  } else {
360  /* escape */
361  run = SHOW_UBITS(re, &s->gb, 6) + 1;
362  LAST_SKIP_BITS(re, &s->gb, 6);
363  UPDATE_CACHE(re, &s->gb);
364  level = SHOW_SBITS(re, &s->gb, 12);
365  SKIP_BITS(re, &s->gb, 12);
366 
367  i += run;
368  if (i > MAX_INDEX)
369  break;
370  j = scantable[i];
371  if (level < 0) {
372  level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
373  level = -level;
374  } else {
375  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
376  }
377  }
378 
379  mismatch ^= level;
380  block[j] = level;
381  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
382  break;
383  UPDATE_CACHE(re, &s->gb);
384  }
385 end:
386  LAST_SKIP_BITS(re, &s->gb, 2);
387  CLOSE_READER(re, &s->gb);
388  }
389  block[63] ^= (mismatch & 1);
390 
391  check_scantable_index(s, i);
392 
393  s->block_last_index[n] = i;
394  return 0;
395 }
396 
397 /**
398  * Note: this function can read out of range and crash for corrupt streams.
399  * Changing this would eat up any speed benefits it has.
400  * Do not use "fast" flag if you need the code to be robust.
401  */
403  int16_t *block, int n)
404 {
405  int level, i, j, run;
406  RLTable *rl = &ff_rl_mpeg1;
407  uint8_t *const scantable = s->intra_scantable.permutated;
408  const int qscale = s->qscale;
409  OPEN_READER(re, &s->gb);
410  i = -1;
411 
412  // special case for first coefficient, no need to add second VLC table
413  UPDATE_CACHE(re, &s->gb);
414  if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
415  level = (3 * qscale) >> 1;
416  if (GET_CACHE(re, &s->gb) & 0x40000000)
417  level = -level;
418  block[0] = level;
419  i++;
420  SKIP_BITS(re, &s->gb, 2);
421  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
422  goto end;
423  }
424 
425  /* now quantify & encode AC coefficients */
426  for (;;) {
427  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
428 
429  if (level != 0) {
430  i += run;
431  if (i > MAX_INDEX)
432  break;
433  j = scantable[i];
434  level = ((level * 2 + 1) * qscale) >> 1;
435  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
436  SHOW_SBITS(re, &s->gb, 1);
437  SKIP_BITS(re, &s->gb, 1);
438  } else {
439  /* escape */
440  run = SHOW_UBITS(re, &s->gb, 6) + 1;
441  LAST_SKIP_BITS(re, &s->gb, 6);
442  UPDATE_CACHE(re, &s->gb);
443  level = SHOW_SBITS(re, &s->gb, 12);
444  SKIP_BITS(re, &s->gb, 12);
445 
446  i += run;
447  if (i > MAX_INDEX)
448  break;
449  j = scantable[i];
450  if (level < 0) {
451  level = ((-level * 2 + 1) * qscale) >> 1;
452  level = -level;
453  } else {
454  level = ((level * 2 + 1) * qscale) >> 1;
455  }
456  }
457 
458  block[j] = level;
459  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF || i > 63)
460  break;
461 
462  UPDATE_CACHE(re, &s->gb);
463  }
464 end:
465  LAST_SKIP_BITS(re, &s->gb, 2);
466  CLOSE_READER(re, &s->gb);
467 
468  check_scantable_index(s, i);
469 
470  s->block_last_index[n] = i;
471  return 0;
472 }
473 
475  int16_t *block, int n)
476 {
477  int level, dc, diff, i, j, run;
478  int component;
479  RLTable *rl;
480  uint8_t *const scantable = s->intra_scantable.permutated;
481  const uint16_t *quant_matrix;
482  const int qscale = s->qscale;
483  int mismatch;
484 
485  /* DC coefficient */
486  if (n < 4) {
487  quant_matrix = s->intra_matrix;
488  component = 0;
489  } else {
490  quant_matrix = s->chroma_intra_matrix;
491  component = (n & 1) + 1;
492  }
493  diff = decode_dc(&s->gb, component);
494  if (diff >= 0xffff)
495  return AVERROR_INVALIDDATA;
496  dc = s->last_dc[component];
497  dc += diff;
498  s->last_dc[component] = dc;
499  block[0] = dc * (1 << (3 - s->intra_dc_precision));
500  ff_tlog(s->avctx, "dc=%d\n", block[0]);
501  mismatch = block[0] ^ 1;
502  i = 0;
503  if (s->intra_vlc_format)
504  rl = &ff_rl_mpeg2;
505  else
506  rl = &ff_rl_mpeg1;
507 
508  {
509  OPEN_READER(re, &s->gb);
510  /* now quantify & encode AC coefficients */
511  for (;;) {
512  UPDATE_CACHE(re, &s->gb);
513  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
514  TEX_VLC_BITS, 2, 0);
515 
516  if (level == 127) {
517  break;
518  } else if (level != 0) {
519  i += run;
520  if (i > MAX_INDEX)
521  break;
522  j = scantable[i];
523  level = (level * qscale * quant_matrix[j]) >> 4;
524  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
525  SHOW_SBITS(re, &s->gb, 1);
526  LAST_SKIP_BITS(re, &s->gb, 1);
527  } else {
528  /* escape */
529  run = SHOW_UBITS(re, &s->gb, 6) + 1;
530  LAST_SKIP_BITS(re, &s->gb, 6);
531  UPDATE_CACHE(re, &s->gb);
532  level = SHOW_SBITS(re, &s->gb, 12);
533  SKIP_BITS(re, &s->gb, 12);
534  i += run;
535  if (i > MAX_INDEX)
536  break;
537  j = scantable[i];
538  if (level < 0) {
539  level = (-level * qscale * quant_matrix[j]) >> 4;
540  level = -level;
541  } else {
542  level = (level * qscale * quant_matrix[j]) >> 4;
543  }
544  }
545 
546  mismatch ^= level;
547  block[j] = level;
548  }
549  CLOSE_READER(re, &s->gb);
550  }
551  block[63] ^= mismatch & 1;
552 
553  check_scantable_index(s, i);
554 
555  s->block_last_index[n] = i;
556  return 0;
557 }
558 
559 /**
560  * Note: this function can read out of range and crash for corrupt streams.
561  * Changing this would eat up any speed benefits it has.
562  * Do not use "fast" flag if you need the code to be robust.
563  */
565  int16_t *block, int n)
566 {
567  int level, dc, diff, i, j, run;
568  int component;
569  RLTable *rl;
570  uint8_t *const scantable = s->intra_scantable.permutated;
571  const uint16_t *quant_matrix;
572  const int qscale = s->qscale;
573 
574  /* DC coefficient */
575  if (n < 4) {
576  quant_matrix = s->intra_matrix;
577  component = 0;
578  } else {
579  quant_matrix = s->chroma_intra_matrix;
580  component = (n & 1) + 1;
581  }
582  diff = decode_dc(&s->gb, component);
583  if (diff >= 0xffff)
584  return AVERROR_INVALIDDATA;
585  dc = s->last_dc[component];
586  dc += diff;
587  s->last_dc[component] = dc;
588  block[0] = dc << (3 - s->intra_dc_precision);
589  i = 0;
590  if (s->intra_vlc_format)
591  rl = &ff_rl_mpeg2;
592  else
593  rl = &ff_rl_mpeg1;
594 
595  {
596  OPEN_READER(re, &s->gb);
597  /* now quantify & encode AC coefficients */
598  for (;;) {
599  UPDATE_CACHE(re, &s->gb);
600  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
601  TEX_VLC_BITS, 2, 0);
602 
603  if (level >= 64 || i > 63) {
604  break;
605  } else if (level != 0) {
606  i += run;
607  j = scantable[i];
608  level = (level * qscale * quant_matrix[j]) >> 4;
609  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
610  SHOW_SBITS(re, &s->gb, 1);
611  LAST_SKIP_BITS(re, &s->gb, 1);
612  } else {
613  /* escape */
614  run = SHOW_UBITS(re, &s->gb, 6) + 1;
615  LAST_SKIP_BITS(re, &s->gb, 6);
616  UPDATE_CACHE(re, &s->gb);
617  level = SHOW_SBITS(re, &s->gb, 12);
618  SKIP_BITS(re, &s->gb, 12);
619  i += run;
620  j = scantable[i];
621  if (level < 0) {
622  level = (-level * qscale * quant_matrix[j]) >> 4;
623  level = -level;
624  } else {
625  level = (level * qscale * quant_matrix[j]) >> 4;
626  }
627  }
628 
629  block[j] = level;
630  }
631  CLOSE_READER(re, &s->gb);
632  }
633 
634  check_scantable_index(s, i);
635 
636  s->block_last_index[n] = i;
637  return 0;
638 }
639 
640 /******************************************/
641 /* decoding */
642 
643 static inline int get_dmv(MpegEncContext *s)
644 {
645  if (get_bits1(&s->gb))
646  return 1 - (get_bits1(&s->gb) << 1);
647  else
648  return 0;
649 }
650 
651 static inline int get_qscale(MpegEncContext *s)
652 {
653  int qscale = get_bits(&s->gb, 5);
654  if (s->q_scale_type)
655  return ff_mpeg2_non_linear_qscale[qscale];
656  else
657  return qscale << 1;
658 }
659 
660 
661 /* motion type (for MPEG-2) */
662 #define MT_FIELD 1
663 #define MT_FRAME 2
664 #define MT_16X8 2
665 #define MT_DMV 3
666 
667 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
668 {
669  int i, j, k, cbp, val, mb_type, motion_type;
670  const int mb_block_count = 4 + (1 << s->chroma_format);
671  int ret;
672 
673  ff_tlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
674 
675  av_assert2(s->mb_skipped == 0);
676 
677  if (s->mb_skip_run-- != 0) {
678  if (s->pict_type == AV_PICTURE_TYPE_P) {
679  s->mb_skipped = 1;
680  s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
682  } else {
683  int mb_type;
684 
685  if (s->mb_x)
686  mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
687  else
688  // FIXME not sure if this is allowed in MPEG at all
689  mb_type = s->current_picture.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1];
690  if (IS_INTRA(mb_type)) {
691  av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
692  return AVERROR_INVALIDDATA;
693  }
694  s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
695  mb_type | MB_TYPE_SKIP;
696 
697  if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
698  s->mb_skipped = 1;
699  }
700 
701  return 0;
702  }
703 
704  switch (s->pict_type) {
705  default:
706  case AV_PICTURE_TYPE_I:
707  if (get_bits1(&s->gb) == 0) {
708  if (get_bits1(&s->gb) == 0) {
710  "Invalid mb type in I-frame at %d %d\n",
711  s->mb_x, s->mb_y);
712  return AVERROR_INVALIDDATA;
713  }
714  mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
715  } else {
716  mb_type = MB_TYPE_INTRA;
717  }
718  break;
719  case AV_PICTURE_TYPE_P:
720  mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
721  if (mb_type < 0) {
723  "Invalid mb type in P-frame at %d %d\n", s->mb_x, s->mb_y);
724  return AVERROR_INVALIDDATA;
725  }
726  mb_type = ptype2mb_type[mb_type];
727  break;
728  case AV_PICTURE_TYPE_B:
729  mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
730  if (mb_type < 0) {
732  "Invalid mb type in B-frame at %d %d\n", s->mb_x, s->mb_y);
733  return AVERROR_INVALIDDATA;
734  }
735  mb_type = btype2mb_type[mb_type];
736  break;
737  }
738  ff_tlog(s->avctx, "mb_type=%x\n", mb_type);
739 // motion_type = 0; /* avoid warning */
740  if (IS_INTRA(mb_type)) {
741  s->bdsp.clear_blocks(s->block[0]);
742 
743  if (!s->chroma_y_shift)
744  s->bdsp.clear_blocks(s->block[6]);
745 
746  /* compute DCT type */
747  // FIXME: add an interlaced_dct coded var?
748  if (s->picture_structure == PICT_FRAME &&
750  s->interlaced_dct = get_bits1(&s->gb);
751 
752  if (IS_QUANT(mb_type))
753  s->qscale = get_qscale(s);
754 
756  /* just parse them */
757  if (s->picture_structure != PICT_FRAME)
758  skip_bits1(&s->gb); /* field select */
759 
760  s->mv[0][0][0] =
761  s->last_mv[0][0][0] =
762  s->last_mv[0][1][0] = mpeg_decode_motion(s, s->mpeg_f_code[0][0],
763  s->last_mv[0][0][0]);
764  s->mv[0][0][1] =
765  s->last_mv[0][0][1] =
766  s->last_mv[0][1][1] = mpeg_decode_motion(s, s->mpeg_f_code[0][1],
767  s->last_mv[0][0][1]);
768 
769  check_marker(s->avctx, &s->gb, "after concealment_motion_vectors");
770  } else {
771  /* reset mv prediction */
772  memset(s->last_mv, 0, sizeof(s->last_mv));
773  }
774  s->mb_intra = 1;
775  // if 1, we memcpy blocks in xvmcvideo
776  if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
777  ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
778 
779  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
780  if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
781  for (i = 0; i < 6; i++)
783  } else {
784  for (i = 0; i < mb_block_count; i++)
785  if ((ret = mpeg2_decode_block_intra(s, *s->pblocks[i], i)) < 0)
786  return ret;
787  }
788  } else {
789  for (i = 0; i < 6; i++) {
791  s->intra_matrix,
793  s->last_dc, *s->pblocks[i],
794  i, s->qscale);
795  if (ret < 0) {
796  av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n",
797  s->mb_x, s->mb_y);
798  return ret;
799  }
800 
801  s->block_last_index[i] = ret;
802  }
803  }
804  } else {
805  if (mb_type & MB_TYPE_ZERO_MV) {
806  av_assert2(mb_type & MB_TYPE_CBP);
807 
808  s->mv_dir = MV_DIR_FORWARD;
809  if (s->picture_structure == PICT_FRAME) {
810  if (s->picture_structure == PICT_FRAME
811  && !s->frame_pred_frame_dct)
812  s->interlaced_dct = get_bits1(&s->gb);
813  s->mv_type = MV_TYPE_16X16;
814  } else {
815  s->mv_type = MV_TYPE_FIELD;
816  mb_type |= MB_TYPE_INTERLACED;
817  s->field_select[0][0] = s->picture_structure - 1;
818  }
819 
820  if (IS_QUANT(mb_type))
821  s->qscale = get_qscale(s);
822 
823  s->last_mv[0][0][0] = 0;
824  s->last_mv[0][0][1] = 0;
825  s->last_mv[0][1][0] = 0;
826  s->last_mv[0][1][1] = 0;
827  s->mv[0][0][0] = 0;
828  s->mv[0][0][1] = 0;
829  } else {
830  av_assert2(mb_type & MB_TYPE_L0L1);
831  // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
832  /* get additional motion vector type */
834  motion_type = MT_FRAME;
835  } else {
836  motion_type = get_bits(&s->gb, 2);
837  if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
838  s->interlaced_dct = get_bits1(&s->gb);
839  }
840 
841  if (IS_QUANT(mb_type))
842  s->qscale = get_qscale(s);
843 
844  /* motion vectors */
845  s->mv_dir = (mb_type >> 13) & 3;
846  ff_tlog(s->avctx, "motion_type=%d\n", motion_type);
847  switch (motion_type) {
848  case MT_FRAME: /* or MT_16X8 */
849  if (s->picture_structure == PICT_FRAME) {
850  mb_type |= MB_TYPE_16x16;
851  s->mv_type = MV_TYPE_16X16;
852  for (i = 0; i < 2; i++) {
853  if (USES_LIST(mb_type, i)) {
854  /* MT_FRAME */
855  s->mv[i][0][0] =
856  s->last_mv[i][0][0] =
857  s->last_mv[i][1][0] =
858  mpeg_decode_motion(s, s->mpeg_f_code[i][0],
859  s->last_mv[i][0][0]);
860  s->mv[i][0][1] =
861  s->last_mv[i][0][1] =
862  s->last_mv[i][1][1] =
863  mpeg_decode_motion(s, s->mpeg_f_code[i][1],
864  s->last_mv[i][0][1]);
865  /* full_pel: only for MPEG-1 */
866  if (s->full_pel[i]) {
867  s->mv[i][0][0] *= 2;
868  s->mv[i][0][1] *= 2;
869  }
870  }
871  }
872  } else {
873  mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
874  s->mv_type = MV_TYPE_16X8;
875  for (i = 0; i < 2; i++) {
876  if (USES_LIST(mb_type, i)) {
877  /* MT_16X8 */
878  for (j = 0; j < 2; j++) {
879  s->field_select[i][j] = get_bits1(&s->gb);
880  for (k = 0; k < 2; k++) {
881  val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
882  s->last_mv[i][j][k]);
883  s->last_mv[i][j][k] = val;
884  s->mv[i][j][k] = val;
885  }
886  }
887  }
888  }
889  }
890  break;
891  case MT_FIELD:
892  s->mv_type = MV_TYPE_FIELD;
893  if (s->picture_structure == PICT_FRAME) {
894  mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
895  for (i = 0; i < 2; i++) {
896  if (USES_LIST(mb_type, i)) {
897  for (j = 0; j < 2; j++) {
898  s->field_select[i][j] = get_bits1(&s->gb);
899  val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
900  s->last_mv[i][j][0]);
901  s->last_mv[i][j][0] = val;
902  s->mv[i][j][0] = val;
903  ff_tlog(s->avctx, "fmx=%d\n", val);
904  val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
905  s->last_mv[i][j][1] >> 1);
906  s->last_mv[i][j][1] = 2 * val;
907  s->mv[i][j][1] = val;
908  ff_tlog(s->avctx, "fmy=%d\n", val);
909  }
910  }
911  }
912  } else {
914  mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
915  for (i = 0; i < 2; i++) {
916  if (USES_LIST(mb_type, i)) {
917  s->field_select[i][0] = get_bits1(&s->gb);
918  for (k = 0; k < 2; k++) {
919  val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
920  s->last_mv[i][0][k]);
921  s->last_mv[i][0][k] = val;
922  s->last_mv[i][1][k] = val;
923  s->mv[i][0][k] = val;
924  }
925  }
926  }
927  }
928  break;
929  case MT_DMV:
930  if (s->progressive_sequence){
931  av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
932  return AVERROR_INVALIDDATA;
933  }
934  s->mv_type = MV_TYPE_DMV;
935  for (i = 0; i < 2; i++) {
936  if (USES_LIST(mb_type, i)) {
937  int dmx, dmy, mx, my, m;
938  const int my_shift = s->picture_structure == PICT_FRAME;
939 
940  mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
941  s->last_mv[i][0][0]);
942  s->last_mv[i][0][0] = mx;
943  s->last_mv[i][1][0] = mx;
944  dmx = get_dmv(s);
945  my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
946  s->last_mv[i][0][1] >> my_shift);
947  dmy = get_dmv(s);
948 
949 
950  s->last_mv[i][0][1] = my * (1 << my_shift);
951  s->last_mv[i][1][1] = my * (1 << my_shift);
952 
953  s->mv[i][0][0] = mx;
954  s->mv[i][0][1] = my;
955  s->mv[i][1][0] = mx; // not used
956  s->mv[i][1][1] = my; // not used
957 
958  if (s->picture_structure == PICT_FRAME) {
959  mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
960 
961  // m = 1 + 2 * s->top_field_first;
962  m = s->top_field_first ? 1 : 3;
963 
964  /* top -> top pred */
965  s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
966  s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
967  m = 4 - m;
968  s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
969  s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
970  } else {
971  mb_type |= MB_TYPE_16x16;
972 
973  s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
974  s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
976  s->mv[i][2][1]--;
977  else
978  s->mv[i][2][1]++;
979  }
980  }
981  }
982  break;
983  default:
985  "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
986  return AVERROR_INVALIDDATA;
987  }
988  }
989 
990  s->mb_intra = 0;
991  if (HAS_CBP(mb_type)) {
992  s->bdsp.clear_blocks(s->block[0]);
993 
995  if (mb_block_count > 6) {
996  cbp *= 1 << mb_block_count - 6;
997  cbp |= get_bits(&s->gb, mb_block_count - 6);
998  s->bdsp.clear_blocks(s->block[6]);
999  }
1000  if (cbp <= 0) {
1002  "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y);
1003  return AVERROR_INVALIDDATA;
1004  }
1005 
1006  // if 1, we memcpy blocks in xvmcvideo
1007  if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1008  ff_xvmc_pack_pblocks(s, cbp);
1009 
1010  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1011  if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1012  for (i = 0; i < 6; i++) {
1013  if (cbp & 32)
1015  else
1016  s->block_last_index[i] = -1;
1017  cbp += cbp;
1018  }
1019  } else {
1020  cbp <<= 12 - mb_block_count;
1021 
1022  for (i = 0; i < mb_block_count; i++) {
1023  if (cbp & (1 << 11)) {
1024  if ((ret = mpeg2_decode_block_non_intra(s, *s->pblocks[i], i)) < 0)
1025  return ret;
1026  } else {
1027  s->block_last_index[i] = -1;
1028  }
1029  cbp += cbp;
1030  }
1031  }
1032  } else {
1033  if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1034  for (i = 0; i < 6; i++) {
1035  if (cbp & 32)
1036  mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1037  else
1038  s->block_last_index[i] = -1;
1039  cbp += cbp;
1040  }
1041  } else {
1042  for (i = 0; i < 6; i++) {
1043  if (cbp & 32) {
1044  if ((ret = mpeg1_decode_block_inter(s, *s->pblocks[i], i)) < 0)
1045  return ret;
1046  } else {
1047  s->block_last_index[i] = -1;
1048  }
1049  cbp += cbp;
1050  }
1051  }
1052  }
1053  } else {
1054  for (i = 0; i < 12; i++)
1055  s->block_last_index[i] = -1;
1056  }
1057  }
1058 
1059  s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1060 
1061  return 0;
1062 }
1063 
1065 {
1066  Mpeg1Context *s = avctx->priv_data;
1068 
1070 
1071  if ( avctx->codec_tag != AV_RL32("VCR2")
1072  && avctx->codec_tag != AV_RL32("BW10"))
1073  avctx->coded_width = avctx->coded_height = 0; // do not trust dimensions from input
1074  ff_mpv_decode_init(s2, avctx);
1075 
1076  s->mpeg_enc_ctx.avctx = avctx;
1077 
1078  /* we need some permutation to store matrices,
1079  * until the decoder sets the real permutation. */
1080  ff_mpv_idct_init(s2);
1083 
1084  s2->chroma_format = 1;
1085  s->mpeg_enc_ctx_allocated = 0;
1087  s->repeat_field = 0;
1088  s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1089  avctx->color_range = AVCOL_RANGE_MPEG;
1090  return 0;
1091 }
1092 
1093 #if HAVE_THREADS
1094 static int mpeg_decode_update_thread_context(AVCodecContext *avctx,
1095  const AVCodecContext *avctx_from)
1096 {
1097  Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1098  MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1099  int err;
1100 
1101  if (avctx == avctx_from ||
1102  !ctx_from->mpeg_enc_ctx_allocated ||
1103  !s1->context_initialized)
1104  return 0;
1105 
1106  err = ff_mpeg_update_thread_context(avctx, avctx_from);
1107  if (err)
1108  return err;
1109 
1110  if (!ctx->mpeg_enc_ctx_allocated)
1111  memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1112 
1113  if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1114  s->picture_number++;
1115 
1116  return 0;
1117 }
1118 #endif
1119 
1120 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1121  const uint8_t *new_perm)
1122 {
1123  uint16_t temp_matrix[64];
1124  int i;
1125 
1126  memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1127 
1128  for (i = 0; i < 64; i++)
1129  matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1130 }
1131 
1133 #if CONFIG_MPEG1_NVDEC_HWACCEL
1135 #endif
1136 #if CONFIG_MPEG1_XVMC_HWACCEL
1138 #endif
1139 #if CONFIG_MPEG1_VDPAU_HWACCEL
1141 #endif
1144 };
1145 
1147 #if CONFIG_MPEG2_NVDEC_HWACCEL
1149 #endif
1150 #if CONFIG_MPEG2_XVMC_HWACCEL
1152 #endif
1153 #if CONFIG_MPEG2_VDPAU_HWACCEL
1155 #endif
1156 #if CONFIG_MPEG2_DXVA2_HWACCEL
1158 #endif
1159 #if CONFIG_MPEG2_D3D11VA_HWACCEL
1162 #endif
1163 #if CONFIG_MPEG2_VAAPI_HWACCEL
1165 #endif
1166 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
1168 #endif
1171 };
1172 
1173 static const enum AVPixelFormat mpeg12_pixfmt_list_422[] = {
1176 };
1177 
1178 static const enum AVPixelFormat mpeg12_pixfmt_list_444[] = {
1181 };
1182 
1184 {
1185  Mpeg1Context *s1 = avctx->priv_data;
1186  MpegEncContext *s = &s1->mpeg_enc_ctx;
1187  const enum AVPixelFormat *pix_fmts;
1188 
1189  if (CONFIG_GRAY && (avctx->flags & AV_CODEC_FLAG_GRAY))
1190  return AV_PIX_FMT_GRAY8;
1191 
1192  if (s->chroma_format < 2)
1193  pix_fmts = avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1194  mpeg1_hwaccel_pixfmt_list_420 :
1196  else if (s->chroma_format == 2)
1197  pix_fmts = mpeg12_pixfmt_list_422;
1198  else
1199  pix_fmts = mpeg12_pixfmt_list_444;
1200 
1201  return ff_thread_get_format(avctx, pix_fmts);
1202 }
1203 
1205 {
1206  // until then pix_fmt may be changed right after codec init
1207  if (avctx->hwaccel)
1208  if (avctx->idct_algo == FF_IDCT_AUTO)
1209  avctx->idct_algo = FF_IDCT_NONE;
1210 
1211  if (avctx->hwaccel && avctx->pix_fmt == AV_PIX_FMT_XVMC) {
1212  Mpeg1Context *s1 = avctx->priv_data;
1213  MpegEncContext *s = &s1->mpeg_enc_ctx;
1214 
1215  s->pack_pblocks = 1;
1216  }
1217 }
1218 
1219 /* Call this function when we know all parameters.
1220  * It may be called in different places for MPEG-1 and MPEG-2. */
1222 {
1223  Mpeg1Context *s1 = avctx->priv_data;
1224  MpegEncContext *s = &s1->mpeg_enc_ctx;
1225  uint8_t old_permutation[64];
1226  int ret;
1227 
1228  if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1229  // MPEG-1 aspect
1230  AVRational aspect_inv = av_d2q(ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1231  avctx->sample_aspect_ratio = (AVRational) { aspect_inv.den, aspect_inv.num };
1232  } else { // MPEG-2
1233  // MPEG-2 aspect
1234  if (s->aspect_ratio_info > 1) {
1235  AVRational dar =
1237  (AVRational) { s1->pan_scan.width,
1238  s1->pan_scan.height }),
1239  (AVRational) { s->width, s->height });
1240 
1241  /* We ignore the spec here and guess a bit as reality does not
1242  * match the spec, see for example res_change_ffmpeg_aspect.ts
1243  * and sequence-display-aspect.mpg.
1244  * issue1613, 621, 562 */
1245  if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1246  (av_cmp_q(dar, (AVRational) { 4, 3 }) &&
1247  av_cmp_q(dar, (AVRational) { 16, 9 }))) {
1250  (AVRational) { s->width, s->height });
1251  } else {
1254  (AVRational) { s1->pan_scan.width, s1->pan_scan.height });
1255 // issue1613 4/3 16/9 -> 16/9
1256 // res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1257 // widescreen-issue562.mpg 4/3 16/9 -> 16/9
1258 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1259  ff_dlog(avctx, "aspect A %d/%d\n",
1262  ff_dlog(avctx, "aspect B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1264  }
1265  } else {
1268  }
1269  } // MPEG-2
1270 
1271  if (av_image_check_sar(s->width, s->height,
1272  avctx->sample_aspect_ratio) < 0) {
1273  av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
1274  avctx->sample_aspect_ratio.num,
1275  avctx->sample_aspect_ratio.den);
1276  avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
1277  }
1278 
1279  if ((s1->mpeg_enc_ctx_allocated == 0) ||
1280  avctx->coded_width != s->width ||
1281  avctx->coded_height != s->height ||
1282  s1->save_width != s->width ||
1283  s1->save_height != s->height ||
1284  av_cmp_q(s1->save_aspect, s->avctx->sample_aspect_ratio) ||
1285  (s1->save_progressive_seq != s->progressive_sequence && FFALIGN(s->height, 16) != FFALIGN(s->height, 32)) ||
1286  0) {
1287  if (s1->mpeg_enc_ctx_allocated) {
1288  ParseContext pc = s->parse_context;
1289  s->parse_context.buffer = 0;
1290  ff_mpv_common_end(s);
1291  s->parse_context = pc;
1292  s1->mpeg_enc_ctx_allocated = 0;
1293  }
1294 
1295  ret = ff_set_dimensions(avctx, s->width, s->height);
1296  if (ret < 0)
1297  return ret;
1298 
1299  if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1300  avctx->rc_max_rate = s->bit_rate;
1301  } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1302  (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1303  avctx->bit_rate = s->bit_rate;
1304  }
1305  s1->save_aspect = s->avctx->sample_aspect_ratio;
1306  s1->save_width = s->width;
1307  s1->save_height = s->height;
1308  s1->save_progressive_seq = s->progressive_sequence;
1309 
1310  /* low_delay may be forced, in this case we will have B-frames
1311  * that behave like P-frames. */
1312  avctx->has_b_frames = !s->low_delay;
1313 
1314  if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1315  // MPEG-1 fps
1317  avctx->ticks_per_frame = 1;
1318 
1320  } else { // MPEG-2
1321  // MPEG-2 fps
1323  &s->avctx->framerate.den,
1324  ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num,
1325  ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1326  1 << 30);
1327  avctx->ticks_per_frame = 2;
1328 
1329  switch (s->chroma_format) {
1330  case 1: avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; break;
1331  case 2:
1332  case 3: avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; break;
1333  default: av_assert0(0);
1334  }
1335  } // MPEG-2
1336 
1337  avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1338  setup_hwaccel_for_pixfmt(avctx);
1339 
1340  /* Quantization matrices may need reordering
1341  * if DCT permutation is changed. */
1342  memcpy(old_permutation, s->idsp.idct_permutation, 64 * sizeof(uint8_t));
1343 
1344  ff_mpv_idct_init(s);
1345  if ((ret = ff_mpv_common_init(s)) < 0)
1346  return ret;
1347 
1348  quant_matrix_rebuild(s->intra_matrix, old_permutation, s->idsp.idct_permutation);
1349  quant_matrix_rebuild(s->inter_matrix, old_permutation, s->idsp.idct_permutation);
1352 
1353  s1->mpeg_enc_ctx_allocated = 1;
1354  }
1355  return 0;
1356 }
1357 
1359  int buf_size)
1360 {
1361  Mpeg1Context *s1 = avctx->priv_data;
1362  MpegEncContext *s = &s1->mpeg_enc_ctx;
1363  int ref, f_code, vbv_delay;
1364 
1365  init_get_bits(&s->gb, buf, buf_size * 8);
1366 
1367  ref = get_bits(&s->gb, 10); /* temporal ref */
1368  s->pict_type = get_bits(&s->gb, 3);
1369  if (s->pict_type == 0 || s->pict_type > 3)
1370  return AVERROR_INVALIDDATA;
1371 
1372  vbv_delay = get_bits(&s->gb, 16);
1373  s->vbv_delay = vbv_delay;
1374  if (s->pict_type == AV_PICTURE_TYPE_P ||
1375  s->pict_type == AV_PICTURE_TYPE_B) {
1376  s->full_pel[0] = get_bits1(&s->gb);
1377  f_code = get_bits(&s->gb, 3);
1378  if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1379  return AVERROR_INVALIDDATA;
1380  f_code += !f_code;
1381  s->mpeg_f_code[0][0] = f_code;
1382  s->mpeg_f_code[0][1] = f_code;
1383  }
1384  if (s->pict_type == AV_PICTURE_TYPE_B) {
1385  s->full_pel[1] = get_bits1(&s->gb);
1386  f_code = get_bits(&s->gb, 3);
1387  if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1388  return AVERROR_INVALIDDATA;
1389  f_code += !f_code;
1390  s->mpeg_f_code[1][0] = f_code;
1391  s->mpeg_f_code[1][1] = f_code;
1392  }
1395 
1396  if (avctx->debug & FF_DEBUG_PICT_INFO)
1397  av_log(avctx, AV_LOG_DEBUG,
1398  "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1399 
1400  s->y_dc_scale = 8;
1401  s->c_dc_scale = 8;
1402  return 0;
1403 }
1404 
1406 {
1407  MpegEncContext *s = &s1->mpeg_enc_ctx;
1408  int horiz_size_ext, vert_size_ext;
1409  int bit_rate_ext;
1410 
1411  skip_bits(&s->gb, 1); /* profile and level esc*/
1412  s->avctx->profile = get_bits(&s->gb, 3);
1413  s->avctx->level = get_bits(&s->gb, 4);
1414  s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1415  s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1416 
1417  if (!s->chroma_format) {
1418  s->chroma_format = 1;
1419  av_log(s->avctx, AV_LOG_WARNING, "Chroma format invalid\n");
1420  }
1421 
1422  horiz_size_ext = get_bits(&s->gb, 2);
1423  vert_size_ext = get_bits(&s->gb, 2);
1424  s->width |= (horiz_size_ext << 12);
1425  s->height |= (vert_size_ext << 12);
1426  bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1427  s->bit_rate += (bit_rate_ext << 18) * 400LL;
1428  check_marker(s->avctx, &s->gb, "after bit rate extension");
1429  s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1430 
1431  s->low_delay = get_bits1(&s->gb);
1433  s->low_delay = 1;
1434 
1435  s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1436  s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1437 
1438  ff_dlog(s->avctx, "sequence extension\n");
1440 
1441  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1443  "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%"PRId64"\n",
1445  s->avctx->rc_buffer_size, s->bit_rate);
1446 }
1447 
1449 {
1450  MpegEncContext *s = &s1->mpeg_enc_ctx;
1451  int color_description, w, h;
1452 
1453  skip_bits(&s->gb, 3); /* video format */
1454  color_description = get_bits1(&s->gb);
1455  if (color_description) {
1456  s->avctx->color_primaries = get_bits(&s->gb, 8);
1457  s->avctx->color_trc = get_bits(&s->gb, 8);
1458  s->avctx->colorspace = get_bits(&s->gb, 8);
1459  }
1460  w = get_bits(&s->gb, 14);
1461  skip_bits(&s->gb, 1); // marker
1462  h = get_bits(&s->gb, 14);
1463  // remaining 3 bits are zero padding
1464 
1465  s1->pan_scan.width = 16 * w;
1466  s1->pan_scan.height = 16 * h;
1467 
1468  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1469  av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1470 }
1471 
1473 {
1474  MpegEncContext *s = &s1->mpeg_enc_ctx;
1475  int i, nofco;
1476 
1477  nofco = 1;
1478  if (s->progressive_sequence) {
1479  if (s->repeat_first_field) {
1480  nofco++;
1481  if (s->top_field_first)
1482  nofco++;
1483  }
1484  } else {
1485  if (s->picture_structure == PICT_FRAME) {
1486  nofco++;
1487  if (s->repeat_first_field)
1488  nofco++;
1489  }
1490  }
1491  for (i = 0; i < nofco; i++) {
1492  s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1493  skip_bits(&s->gb, 1); // marker
1494  s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1495  skip_bits(&s->gb, 1); // marker
1496  }
1497 
1498  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1500  "pde (%"PRId16",%"PRId16") (%"PRId16",%"PRId16") (%"PRId16",%"PRId16")\n",
1501  s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1502  s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1503  s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1504 }
1505 
1506 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64],
1507  uint16_t matrix1[64], int intra)
1508 {
1509  int i;
1510 
1511  for (i = 0; i < 64; i++) {
1512  int j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
1513  int v = get_bits(&s->gb, 8);
1514  if (v == 0) {
1515  av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1516  return AVERROR_INVALIDDATA;
1517  }
1518  if (intra && i == 0 && v != 8) {
1519  av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1520  v = 8; // needed by pink.mpg / issue1046
1521  }
1522  matrix0[j] = v;
1523  if (matrix1)
1524  matrix1[j] = v;
1525  }
1526  return 0;
1527 }
1528 
1530 {
1531  ff_dlog(s->avctx, "matrix extension\n");
1532 
1533  if (get_bits1(&s->gb))
1535  if (get_bits1(&s->gb))
1537  if (get_bits1(&s->gb))
1539  if (get_bits1(&s->gb))
1541 }
1542 
1544 {
1545  MpegEncContext *s = &s1->mpeg_enc_ctx;
1546 
1547  s->full_pel[0] = s->full_pel[1] = 0;
1548  s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1549  s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1550  s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1551  s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1552  if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1554  "Missing picture start code, guessing missing values\n");
1555  if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1556  if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1558  else
1560  } else
1564  }
1565  s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1566  s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1567  s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1568  s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1569 
1570  s->intra_dc_precision = get_bits(&s->gb, 2);
1571  s->picture_structure = get_bits(&s->gb, 2);
1572  s->top_field_first = get_bits1(&s->gb);
1573  s->frame_pred_frame_dct = get_bits1(&s->gb);
1575  s->q_scale_type = get_bits1(&s->gb);
1576  s->intra_vlc_format = get_bits1(&s->gb);
1577  s->alternate_scan = get_bits1(&s->gb);
1578  s->repeat_first_field = get_bits1(&s->gb);
1579  s->chroma_420_type = get_bits1(&s->gb);
1580  s->progressive_frame = get_bits1(&s->gb);
1581 
1582  if (s->alternate_scan) {
1585  } else {
1588  }
1589 
1590  /* composite display not parsed */
1591  ff_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1592  ff_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1593  ff_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1594  ff_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1595  ff_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1596  ff_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1597  ff_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1598  ff_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1599  ff_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1600 }
1601 
1602 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1603 {
1604  AVCodecContext *avctx = s->avctx;
1605  Mpeg1Context *s1 = (Mpeg1Context *) s;
1606  int ret;
1607 
1608  /* start frame decoding */
1609  if (s->first_field || s->picture_structure == PICT_FRAME) {
1610  AVFrameSideData *pan_scan;
1611 
1612  if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
1613  return ret;
1614 
1616 
1617  /* first check if we must repeat the frame */
1619  if (s->repeat_first_field) {
1620  if (s->progressive_sequence) {
1621  if (s->top_field_first)
1623  else
1625  } else if (s->progressive_frame) {
1627  }
1628  }
1629 
1632  sizeof(s1->pan_scan));
1633  if (!pan_scan)
1634  return AVERROR(ENOMEM);
1635  memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1636 
1637  if (s1->a53_caption) {
1640  s1->a53_caption_size);
1641  if (sd)
1642  memcpy(sd->data, s1->a53_caption, s1->a53_caption_size);
1643  av_freep(&s1->a53_caption);
1644  }
1645 
1646  if (s1->has_stereo3d) {
1648  if (!stereo)
1649  return AVERROR(ENOMEM);
1650 
1651  *stereo = s1->stereo3d;
1652  s1->has_stereo3d = 0;
1653  }
1654 
1655  if (s1->has_afd) {
1656  AVFrameSideData *sd =
1658  AV_FRAME_DATA_AFD, 1);
1659  if (!sd)
1660  return AVERROR(ENOMEM);
1661 
1662  *sd->data = s1->afd;
1663  s1->has_afd = 0;
1664  }
1665 
1666  if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1667  ff_thread_finish_setup(avctx);
1668  } else { // second field
1669  int i;
1670 
1671  if (!s->current_picture_ptr) {
1672  av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1673  return AVERROR_INVALIDDATA;
1674  }
1675 
1676  if (s->avctx->hwaccel &&
1678  if ((ret = s->avctx->hwaccel->end_frame(s->avctx)) < 0) {
1679  av_log(avctx, AV_LOG_ERROR,
1680  "hardware accelerator failed to decode first field\n");
1681  return ret;
1682  }
1683  }
1684 
1685  for (i = 0; i < 4; i++) {
1686  s->current_picture.f->data[i] = s->current_picture_ptr->f->data[i];
1688  s->current_picture.f->data[i] +=
1689  s->current_picture_ptr->f->linesize[i];
1690  }
1691  }
1692 
1693  if (avctx->hwaccel) {
1694  if ((ret = avctx->hwaccel->start_frame(avctx, buf, buf_size)) < 0)
1695  return ret;
1696  }
1697 
1698  return 0;
1699 }
1700 
1701 #define DECODE_SLICE_ERROR -1
1702 #define DECODE_SLICE_OK 0
1703 
1704 /**
1705  * Decode a slice.
1706  * MpegEncContext.mb_y must be set to the MB row from the startcode.
1707  * @return DECODE_SLICE_ERROR if the slice is damaged,
1708  * DECODE_SLICE_OK if this slice is OK
1709  */
1710 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1711  const uint8_t **buf, int buf_size)
1712 {
1713  AVCodecContext *avctx = s->avctx;
1714  const int lowres = s->avctx->lowres;
1715  const int field_pic = s->picture_structure != PICT_FRAME;
1716  int ret;
1717 
1718  s->resync_mb_x =
1719  s->resync_mb_y = -1;
1720 
1721  av_assert0(mb_y < s->mb_height);
1722 
1723  init_get_bits(&s->gb, *buf, buf_size * 8);
1724  if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1725  skip_bits(&s->gb, 3);
1726 
1728  s->interlaced_dct = 0;
1729 
1730  s->qscale = get_qscale(s);
1731 
1732  if (s->qscale == 0) {
1733  av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1734  return AVERROR_INVALIDDATA;
1735  }
1736 
1737  /* extra slice info */
1738  if (skip_1stop_8data_bits(&s->gb) < 0)
1739  return AVERROR_INVALIDDATA;
1740 
1741  s->mb_x = 0;
1742 
1743  if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1744  skip_bits1(&s->gb);
1745  } else {
1746  while (get_bits_left(&s->gb) > 0) {
1747  int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1748  MBINCR_VLC_BITS, 2);
1749  if (code < 0) {
1750  av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1751  return AVERROR_INVALIDDATA;
1752  }
1753  if (code >= 33) {
1754  if (code == 33)
1755  s->mb_x += 33;
1756  /* otherwise, stuffing, nothing to do */
1757  } else {
1758  s->mb_x += code;
1759  break;
1760  }
1761  }
1762  }
1763 
1764  if (s->mb_x >= (unsigned) s->mb_width) {
1765  av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1766  return AVERROR_INVALIDDATA;
1767  }
1768 
1769  if (avctx->hwaccel && avctx->hwaccel->decode_slice) {
1770  const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1771  int start_code = -1;
1772  buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1773  if (buf_end < *buf + buf_size)
1774  buf_end -= 4;
1775  s->mb_y = mb_y;
1776  if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1777  return DECODE_SLICE_ERROR;
1778  *buf = buf_end;
1779  return DECODE_SLICE_OK;
1780  }
1781 
1782  s->resync_mb_x = s->mb_x;
1783  s->resync_mb_y = s->mb_y = mb_y;
1784  s->mb_skip_run = 0;
1786 
1787  if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1788  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1790  "qp:%d fc:%2d%2d%2d%2d %s %s %s %s %s dc:%d pstruct:%d fdct:%d cmv:%d qtype:%d ivlc:%d rff:%d %s\n",
1791  s->qscale,
1792  s->mpeg_f_code[0][0], s->mpeg_f_code[0][1],
1793  s->mpeg_f_code[1][0], s->mpeg_f_code[1][1],
1794  s->pict_type == AV_PICTURE_TYPE_I ? "I" :
1795  (s->pict_type == AV_PICTURE_TYPE_P ? "P" :
1796  (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")),
1797  s->progressive_sequence ? "ps" : "",
1798  s->progressive_frame ? "pf" : "",
1799  s->alternate_scan ? "alt" : "",
1800  s->top_field_first ? "top" : "",
1804  s->repeat_first_field, s->chroma_420_type ? "420" : "");
1805  }
1806  }
1807 
1808  for (;;) {
1809  // If 1, we memcpy blocks in xvmcvideo.
1810  if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1811  ff_xvmc_init_block(s); // set s->block
1812 
1813  if ((ret = mpeg_decode_mb(s, s->block)) < 0)
1814  return ret;
1815 
1816  // Note motion_val is normally NULL unless we want to extract the MVs.
1817  if (s->current_picture.motion_val[0] && !s->encoding) {
1818  const int wrap = s->b8_stride;
1819  int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1820  int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1821  int motion_x, motion_y, dir, i;
1822 
1823  for (i = 0; i < 2; i++) {
1824  for (dir = 0; dir < 2; dir++) {
1825  if (s->mb_intra ||
1826  (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1827  motion_x = motion_y = 0;
1828  } else if (s->mv_type == MV_TYPE_16X16 ||
1829  (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1830  motion_x = s->mv[dir][0][0];
1831  motion_y = s->mv[dir][0][1];
1832  } else { /* if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8)) */
1833  motion_x = s->mv[dir][i][0];
1834  motion_y = s->mv[dir][i][1];
1835  }
1836 
1837  s->current_picture.motion_val[dir][xy][0] = motion_x;
1838  s->current_picture.motion_val[dir][xy][1] = motion_y;
1839  s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1840  s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1841  s->current_picture.ref_index [dir][b8_xy] =
1842  s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1843  av_assert2(s->field_select[dir][i] == 0 ||
1844  s->field_select[dir][i] == 1);
1845  }
1846  xy += wrap;
1847  b8_xy += 2;
1848  }
1849  }
1850 
1851  s->dest[0] += 16 >> lowres;
1852  s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1853  s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1854 
1856 
1857  if (++s->mb_x >= s->mb_width) {
1858  const int mb_size = 16 >> s->avctx->lowres;
1859  int left;
1860 
1861  ff_mpeg_draw_horiz_band(s, mb_size * (s->mb_y >> field_pic), mb_size);
1863 
1864  s->mb_x = 0;
1865  s->mb_y += 1 << field_pic;
1866 
1867  if (s->mb_y >= s->mb_height) {
1868  int left = get_bits_left(&s->gb);
1869  int is_d10 = s->chroma_format == 2 &&
1870  s->pict_type == AV_PICTURE_TYPE_I &&
1871  avctx->profile == 0 && avctx->level == 5 &&
1872  s->intra_dc_precision == 2 &&
1873  s->q_scale_type == 1 && s->alternate_scan == 0 &&
1874  s->progressive_frame == 0
1875  /* vbv_delay == 0xBBB || 0xE10 */;
1876 
1877  if (left >= 32 && !is_d10) {
1878  GetBitContext gb = s->gb;
1879  align_get_bits(&gb);
1880  if (show_bits(&gb, 24) == 0x060E2B) {
1881  av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1882  is_d10 = 1;
1883  }
1884  if (left > 32 && show_bits_long(&gb, 32) == 0x201) {
1885  av_log(avctx, AV_LOG_DEBUG, "skipping m704 alpha (unsupported)\n");
1886  goto eos;
1887  }
1888  }
1889 
1890  if (left < 0 ||
1891  (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) ||
1892  ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1893  av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X at %d %d\n",
1894  left, left>0 ? show_bits(&s->gb, FFMIN(left, 23)) : 0, s->mb_x, s->mb_y);
1895  return AVERROR_INVALIDDATA;
1896  } else
1897  goto eos;
1898  }
1899  // There are some files out there which are missing the last slice
1900  // in cases where the slice is completely outside the visible
1901  // area, we detect this here instead of running into the end expecting
1902  // more data
1903  left = get_bits_left(&s->gb);
1904  if (s->mb_y >= ((s->height + 15) >> 4) &&
1905  !s->progressive_sequence &&
1906  left <= 25 &&
1907  left >= 0 &&
1908  s->mb_skip_run == -1 &&
1909  (!left || show_bits(&s->gb, left) == 0))
1910  goto eos;
1911 
1913  }
1914 
1915  /* skip mb handling */
1916  if (s->mb_skip_run == -1) {
1917  /* read increment again */
1918  s->mb_skip_run = 0;
1919  for (;;) {
1920  int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1921  MBINCR_VLC_BITS, 2);
1922  if (code < 0) {
1923  av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1924  return AVERROR_INVALIDDATA;
1925  }
1926  if (code >= 33) {
1927  if (code == 33) {
1928  s->mb_skip_run += 33;
1929  } else if (code == 35) {
1930  if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1931  av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1932  return AVERROR_INVALIDDATA;
1933  }
1934  goto eos; /* end of slice */
1935  }
1936  /* otherwise, stuffing, nothing to do */
1937  } else {
1938  s->mb_skip_run += code;
1939  break;
1940  }
1941  }
1942  if (s->mb_skip_run) {
1943  int i;
1944  if (s->pict_type == AV_PICTURE_TYPE_I) {
1946  "skipped MB in I-frame at %d %d\n", s->mb_x, s->mb_y);
1947  return AVERROR_INVALIDDATA;
1948  }
1949 
1950  /* skip mb */
1951  s->mb_intra = 0;
1952  for (i = 0; i < 12; i++)
1953  s->block_last_index[i] = -1;
1955  s->mv_type = MV_TYPE_16X16;
1956  else
1957  s->mv_type = MV_TYPE_FIELD;
1958  if (s->pict_type == AV_PICTURE_TYPE_P) {
1959  /* if P type, zero motion vector is implied */
1960  s->mv_dir = MV_DIR_FORWARD;
1961  s->mv[0][0][0] = s->mv[0][0][1] = 0;
1962  s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1963  s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1964  s->field_select[0][0] = (s->picture_structure - 1) & 1;
1965  } else {
1966  /* if B type, reuse previous vectors and directions */
1967  s->mv[0][0][0] = s->last_mv[0][0][0];
1968  s->mv[0][0][1] = s->last_mv[0][0][1];
1969  s->mv[1][0][0] = s->last_mv[1][0][0];
1970  s->mv[1][0][1] = s->last_mv[1][0][1];
1971  }
1972  }
1973  }
1974  }
1975 eos: // end of slice
1976  if (get_bits_left(&s->gb) < 0) {
1977  av_log(s, AV_LOG_ERROR, "overread %d\n", -get_bits_left(&s->gb));
1978  return AVERROR_INVALIDDATA;
1979  }
1980  *buf += (get_bits_count(&s->gb) - 1) / 8;
1981  ff_dlog(s, "Slice start:%d %d end:%d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
1982  return 0;
1983 }
1984 
1986 {
1987  MpegEncContext *s = *(void **) arg;
1988  const uint8_t *buf = s->gb.buffer;
1989  int mb_y = s->start_mb_y;
1990  const int field_pic = s->picture_structure != PICT_FRAME;
1991 
1992  s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1993 
1994  for (;;) {
1995  uint32_t start_code;
1996  int ret;
1997 
1998  ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
1999  emms_c();
2000  ff_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
2001  ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
2002  s->start_mb_y, s->end_mb_y, s->er.error_count);
2003  if (ret < 0) {
2004  if (c->err_recognition & AV_EF_EXPLODE)
2005  return ret;
2006  if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
2008  s->mb_x, s->mb_y,
2010  } else {
2012  s->mb_x - 1, s->mb_y,
2014  }
2015 
2016  if (s->mb_y == s->end_mb_y)
2017  return 0;
2018 
2019  start_code = -1;
2020  buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
2021  mb_y = start_code - SLICE_MIN_START_CODE;
2022  if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
2023  mb_y += (*buf&0xE0)<<2;
2024  mb_y <<= field_pic;
2026  mb_y++;
2027  if (mb_y < 0 || mb_y >= s->end_mb_y)
2028  return AVERROR_INVALIDDATA;
2029  }
2030 }
2031 
2032 /**
2033  * Handle slice ends.
2034  * @return 1 if it seems to be the last slice
2035  */
2036 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2037 {
2038  Mpeg1Context *s1 = avctx->priv_data;
2039  MpegEncContext *s = &s1->mpeg_enc_ctx;
2040 
2042  return 0;
2043 
2044  if (s->avctx->hwaccel) {
2045  int ret = s->avctx->hwaccel->end_frame(s->avctx);
2046  if (ret < 0) {
2047  av_log(avctx, AV_LOG_ERROR,
2048  "hardware accelerator failed to decode picture\n");
2049  return ret;
2050  }
2051  }
2052 
2053  /* end of slice reached */
2054  if (/* s->mb_y << field_pic == s->mb_height && */ !s->first_field && !s1->first_slice) {
2055  /* end of image */
2056 
2057  ff_er_frame_end(&s->er);
2058 
2059  ff_mpv_frame_end(s);
2060 
2061  if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
2062  int ret = av_frame_ref(pict, s->current_picture_ptr->f);
2063  if (ret < 0)
2064  return ret;
2067  } else {
2068  if (avctx->active_thread_type & FF_THREAD_FRAME)
2069  s->picture_number++;
2070  /* latency of 1 frame for I- and P-frames */
2071  /* XXX: use another variable than picture_number */
2072  if (s->last_picture_ptr) {
2073  int ret = av_frame_ref(pict, s->last_picture_ptr->f);
2074  if (ret < 0)
2075  return ret;
2078  }
2079  }
2080 
2081  return 1;
2082  } else {
2083  return 0;
2084  }
2085 }
2086 
2088  const uint8_t *buf, int buf_size)
2089 {
2090  Mpeg1Context *s1 = avctx->priv_data;
2091  MpegEncContext *s = &s1->mpeg_enc_ctx;
2092  int width, height;
2093  int i, v, j;
2094 
2095  init_get_bits(&s->gb, buf, buf_size * 8);
2096 
2097  width = get_bits(&s->gb, 12);
2098  height = get_bits(&s->gb, 12);
2099  if (width == 0 || height == 0) {
2100  av_log(avctx, AV_LOG_WARNING,
2101  "Invalid horizontal or vertical size value.\n");
2103  return AVERROR_INVALIDDATA;
2104  }
2105  s->aspect_ratio_info = get_bits(&s->gb, 4);
2106  if (s->aspect_ratio_info == 0) {
2107  av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2109  return AVERROR_INVALIDDATA;
2110  }
2111  s->frame_rate_index = get_bits(&s->gb, 4);
2112  if (s->frame_rate_index == 0 || s->frame_rate_index > 13) {
2113  av_log(avctx, AV_LOG_WARNING,
2114  "frame_rate_index %d is invalid\n", s->frame_rate_index);
2115  s->frame_rate_index = 1;
2116  }
2117  s->bit_rate = get_bits(&s->gb, 18) * 400LL;
2118  if (check_marker(s->avctx, &s->gb, "in sequence header") == 0) {
2119  return AVERROR_INVALIDDATA;
2120  }
2121 
2122  s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2123  skip_bits(&s->gb, 1);
2124 
2125  /* get matrix */
2126  if (get_bits1(&s->gb)) {
2128  } else {
2129  for (i = 0; i < 64; i++) {
2130  j = s->idsp.idct_permutation[i];
2132  s->intra_matrix[j] = v;
2133  s->chroma_intra_matrix[j] = v;
2134  }
2135  }
2136  if (get_bits1(&s->gb)) {
2138  } else {
2139  for (i = 0; i < 64; i++) {
2140  int j = s->idsp.idct_permutation[i];
2142  s->inter_matrix[j] = v;
2143  s->chroma_inter_matrix[j] = v;
2144  }
2145  }
2146 
2147  if (show_bits(&s->gb, 23) != 0) {
2148  av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2149  return AVERROR_INVALIDDATA;
2150  }
2151 
2152  s->width = width;
2153  s->height = height;
2154 
2155  /* We set MPEG-2 parameters so that it emulates MPEG-1. */
2156  s->progressive_sequence = 1;
2157  s->progressive_frame = 1;
2159  s->first_field = 0;
2160  s->frame_pred_frame_dct = 1;
2161  s->chroma_format = 1;
2162  s->codec_id =
2164  s->out_format = FMT_MPEG1;
2165  s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2167  s->low_delay = 1;
2168 
2169  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2170  av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%"PRId64", aspect_ratio_info: %d \n",
2172 
2173  return 0;
2174 }
2175 
2177 {
2178  Mpeg1Context *s1 = avctx->priv_data;
2179  MpegEncContext *s = &s1->mpeg_enc_ctx;
2180  int i, v, ret;
2181 
2182  /* start new MPEG-1 context decoding */
2183  s->out_format = FMT_MPEG1;
2184  if (s1->mpeg_enc_ctx_allocated) {
2185  ff_mpv_common_end(s);
2186  s1->mpeg_enc_ctx_allocated = 0;
2187  }
2188  s->width = avctx->coded_width;
2189  s->height = avctx->coded_height;
2190  avctx->has_b_frames = 0; // true?
2191  s->low_delay = 1;
2192 
2193  avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2194  setup_hwaccel_for_pixfmt(avctx);
2195 
2196  ff_mpv_idct_init(s);
2197  if ((ret = ff_mpv_common_init(s)) < 0)
2198  return ret;
2199  s1->mpeg_enc_ctx_allocated = 1;
2200 
2201  for (i = 0; i < 64; i++) {
2202  int j = s->idsp.idct_permutation[i];
2204  s->intra_matrix[j] = v;
2205  s->chroma_intra_matrix[j] = v;
2206 
2208  s->inter_matrix[j] = v;
2209  s->chroma_inter_matrix[j] = v;
2210  }
2211 
2212  s->progressive_sequence = 1;
2213  s->progressive_frame = 1;
2215  s->first_field = 0;
2216  s->frame_pred_frame_dct = 1;
2217  s->chroma_format = 1;
2218  if (s->codec_tag == AV_RL32("BW10")) {
2220  } else {
2221  s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2223  }
2224  s1->save_width = s->width;
2225  s1->save_height = s->height;
2227  return 0;
2228 }
2229 
2231  const uint8_t *p, int buf_size)
2232 {
2233  Mpeg1Context *s1 = avctx->priv_data;
2234 
2235  if (buf_size >= 6 &&
2236  p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2237  p[4] == 3 && (p[5] & 0x40)) {
2238  /* extract A53 Part 4 CC data */
2239  int cc_count = p[5] & 0x1f;
2240  if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2241  av_freep(&s1->a53_caption);
2242  s1->a53_caption_size = cc_count * 3;
2244  if (!s1->a53_caption) {
2245  s1->a53_caption_size = 0;
2246  } else {
2247  memcpy(s1->a53_caption, p + 7, s1->a53_caption_size);
2248  }
2250  }
2251  return 1;
2252  } else if (buf_size >= 2 &&
2253  p[0] == 0x03 && (p[1]&0x7f) == 0x01) {
2254  /* extract SCTE-20 CC data */
2255  GetBitContext gb;
2256  int cc_count = 0;
2257  int i;
2258 
2259  init_get_bits(&gb, p + 2, buf_size - 2);
2260  cc_count = get_bits(&gb, 5);
2261  if (cc_count > 0) {
2262  av_freep(&s1->a53_caption);
2263  s1->a53_caption_size = cc_count * 3;
2265  if (!s1->a53_caption) {
2266  s1->a53_caption_size = 0;
2267  } else {
2268  uint8_t field, cc1, cc2;
2269  uint8_t *cap = s1->a53_caption;
2270  for (i = 0; i < cc_count && get_bits_left(&gb) >= 26; i++) {
2271  skip_bits(&gb, 2); // priority
2272  field = get_bits(&gb, 2);
2273  skip_bits(&gb, 5); // line_offset
2274  cc1 = get_bits(&gb, 8);
2275  cc2 = get_bits(&gb, 8);
2276  skip_bits(&gb, 1); // marker
2277 
2278  if (!field) { // forbidden
2279  cap[0] = cap[1] = cap[2] = 0x00;
2280  } else {
2281  field = (field == 2 ? 1 : 0);
2282  if (!s1->mpeg_enc_ctx.top_field_first) field = !field;
2283  cap[0] = 0x04 | field;
2284  cap[1] = ff_reverse[cc1];
2285  cap[2] = ff_reverse[cc2];
2286  }
2287  cap += 3;
2288  }
2289  }
2291  }
2292  return 1;
2293  } else if (buf_size >= 11 &&
2294  p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2295  /* extract DVD CC data
2296  *
2297  * uint32_t user_data_start_code 0x000001B2 (big endian)
2298  * uint16_t user_identifier 0x4343 "CC"
2299  * uint8_t user_data_type_code 0x01
2300  * uint8_t caption_block_size 0xF8
2301  * uint8_t
2302  * bit 7 caption_odd_field_first 1=odd field (CC1/CC2) first 0=even field (CC3/CC4) first
2303  * bit 6 caption_filler 0
2304  * bit 5:1 caption_block_count number of caption blocks (pairs of caption words = frames). Most DVDs use 15 per start of GOP.
2305  * bit 0 caption_extra_field_added 1=one additional caption word
2306  *
2307  * struct caption_field_block {
2308  * uint8_t
2309  * bit 7:1 caption_filler 0x7F (all 1s)
2310  * bit 0 caption_field_odd 1=odd field (this is CC1/CC2) 0=even field (this is CC3/CC4)
2311  * uint8_t caption_first_byte
2312  * uint8_t caption_second_byte
2313  * } caption_block[(caption_block_count * 2) + caption_extra_field_added];
2314  *
2315  * Some DVDs encode caption data for both fields with caption_field_odd=1. The only way to decode the fields
2316  * correctly is to start on the field indicated by caption_odd_field_first and count between odd/even fields.
2317  * Don't assume that the first caption word is the odd field. There do exist MPEG files in the wild that start
2318  * on the even field. There also exist DVDs in the wild that encode an odd field count and the
2319  * caption_extra_field_added/caption_odd_field_first bits change per packet to allow that. */
2320  int cc_count = 0;
2321  int i;
2322  // There is a caption count field in the data, but it is often
2323  // incorrect. So count the number of captions present.
2324  for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2325  cc_count++;
2326  // Transform the DVD format into A53 Part 4 format
2327  if (cc_count > 0) {
2328  av_freep(&s1->a53_caption);
2329  s1->a53_caption_size = cc_count * 6;
2331  if (!s1->a53_caption) {
2332  s1->a53_caption_size = 0;
2333  } else {
2334  uint8_t field1 = !!(p[4] & 0x80);
2335  uint8_t *cap = s1->a53_caption;
2336  p += 5;
2337  for (i = 0; i < cc_count; i++) {
2338  cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2339  cap[1] = p[1];
2340  cap[2] = p[2];
2341  cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2342  cap[4] = p[4];
2343  cap[5] = p[5];
2344  cap += 6;
2345  p += 6;
2346  }
2347  }
2349  }
2350  return 1;
2351  }
2352  return 0;
2353 }
2354 
2356  const uint8_t *p, int buf_size)
2357 {
2358  Mpeg1Context *s = avctx->priv_data;
2359  const uint8_t *buf_end = p + buf_size;
2360  Mpeg1Context *s1 = avctx->priv_data;
2361 
2362 #if 0
2363  int i;
2364  for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2365  av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2366  }
2367  av_log(avctx, AV_LOG_ERROR, "\n");
2368 #endif
2369 
2370  if (buf_size > 29){
2371  int i;
2372  for(i=0; i<20; i++)
2373  if (!memcmp(p+i, "\0TMPGEXS\0", 9)){
2374  s->tmpgexs= 1;
2375  }
2376  }
2377  /* we parse the DTG active format information */
2378  if (buf_end - p >= 5 &&
2379  p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2380  int flags = p[4];
2381  p += 5;
2382  if (flags & 0x80) {
2383  /* skip event id */
2384  p += 2;
2385  }
2386  if (flags & 0x40) {
2387  if (buf_end - p < 1)
2388  return;
2389  s1->has_afd = 1;
2390  s1->afd = p[0] & 0x0f;
2391  }
2392  } else if (buf_end - p >= 6 &&
2393  p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2394  p[4] == 0x03) { // S3D_video_format_length
2395  // the 0x7F mask ignores the reserved_bit value
2396  const uint8_t S3D_video_format_type = p[5] & 0x7F;
2397 
2398  if (S3D_video_format_type == 0x03 ||
2399  S3D_video_format_type == 0x04 ||
2400  S3D_video_format_type == 0x08 ||
2401  S3D_video_format_type == 0x23) {
2402 
2403  s1->has_stereo3d = 1;
2404 
2405  switch (S3D_video_format_type) {
2406  case 0x03:
2408  break;
2409  case 0x04:
2411  break;
2412  case 0x08:
2414  break;
2415  case 0x23:
2417  break;
2418  }
2419  }
2420  } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2421  return;
2422  }
2423 }
2424 
2425 static void mpeg_decode_gop(AVCodecContext *avctx,
2426  const uint8_t *buf, int buf_size)
2427 {
2428  Mpeg1Context *s1 = avctx->priv_data;
2429  MpegEncContext *s = &s1->mpeg_enc_ctx;
2430  int broken_link;
2431  int64_t tc;
2432 
2433  init_get_bits(&s->gb, buf, buf_size * 8);
2434 
2435  tc = s-> timecode_frame_start = get_bits(&s->gb, 25);
2436 
2437 #if FF_API_PRIVATE_OPT
2439  avctx->timecode_frame_start = tc;
2441 #endif
2442 
2443  s->closed_gop = get_bits1(&s->gb);
2444  /* broken_link indicates that after editing the
2445  * reference frames of the first B-Frames after GOP I-Frame
2446  * are missing (open gop) */
2447  broken_link = get_bits1(&s->gb);
2448 
2449  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2450  char tcbuf[AV_TIMECODE_STR_SIZE];
2453  "GOP (%s) closed_gop=%d broken_link=%d\n",
2454  tcbuf, s->closed_gop, broken_link);
2455  }
2456 }
2457 
2458 static int decode_chunks(AVCodecContext *avctx, AVFrame *picture,
2459  int *got_output, const uint8_t *buf, int buf_size)
2460 {
2461  Mpeg1Context *s = avctx->priv_data;
2463  const uint8_t *buf_ptr = buf;
2464  const uint8_t *buf_end = buf + buf_size;
2465  int ret, input_size;
2466  int last_code = 0, skip_frame = 0;
2467  int picture_start_code_seen = 0;
2468 
2469  for (;;) {
2470  /* find next start code */
2471  uint32_t start_code = -1;
2472  buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2473  if (start_code > 0x1ff) {
2474  if (!skip_frame) {
2475  if (HAVE_THREADS &&
2476  (avctx->active_thread_type & FF_THREAD_SLICE) &&
2477  !avctx->hwaccel) {
2478  int i;
2479  av_assert0(avctx->thread_count > 1);
2480 
2481  avctx->execute(avctx, slice_decode_thread,
2482  &s2->thread_context[0], NULL,
2483  s->slice_count, sizeof(void *));
2484  for (i = 0; i < s->slice_count; i++)
2485  s2->er.error_count += s2->thread_context[i]->er.error_count;
2486  }
2487 
2488  ret = slice_end(avctx, picture);
2489  if (ret < 0)
2490  return ret;
2491  else if (ret) {
2492  // FIXME: merge with the stuff in mpeg_decode_slice
2493  if (s2->last_picture_ptr || s2->low_delay)
2494  *got_output = 1;
2495  }
2496  }
2497  s2->pict_type = 0;
2498 
2499  if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2500  return AVERROR_INVALIDDATA;
2501 
2502  return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2503  }
2504 
2505  input_size = buf_end - buf_ptr;
2506 
2507  if (avctx->debug & FF_DEBUG_STARTCODE)
2508  av_log(avctx, AV_LOG_DEBUG, "%3"PRIX32" at %"PTRDIFF_SPECIFIER" left %d\n",
2509  start_code, buf_ptr - buf, input_size);
2510 
2511  /* prepare data for next start code */
2512  switch (start_code) {
2513  case SEQ_START_CODE:
2514  if (last_code == 0) {
2515  mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2516  if (buf != avctx->extradata)
2517  s->sync = 1;
2518  } else {
2519  av_log(avctx, AV_LOG_ERROR,
2520  "ignoring SEQ_START_CODE after %X\n", last_code);
2521  if (avctx->err_recognition & AV_EF_EXPLODE)
2522  return AVERROR_INVALIDDATA;
2523  }
2524  break;
2525 
2526  case PICTURE_START_CODE:
2527  if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2528  /* If it's a frame picture, there can't be more than one picture header.
2529  Yet, it does happen and we need to handle it. */
2530  av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2531  break;
2532  }
2533  picture_start_code_seen = 1;
2534 
2535  if (s2->width <= 0 || s2->height <= 0) {
2536  av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2537  s2->width, s2->height);
2538  return AVERROR_INVALIDDATA;
2539  }
2540 
2541  if (s->tmpgexs){
2542  s2->intra_dc_precision= 3;
2543  s2->intra_matrix[0]= 1;
2544  }
2545  if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2546  !avctx->hwaccel && s->slice_count) {
2547  int i;
2548 
2549  avctx->execute(avctx, slice_decode_thread,
2550  s2->thread_context, NULL,
2551  s->slice_count, sizeof(void *));
2552  for (i = 0; i < s->slice_count; i++)
2553  s2->er.error_count += s2->thread_context[i]->er.error_count;
2554  s->slice_count = 0;
2555  }
2556  if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2557  ret = mpeg_decode_postinit(avctx);
2558  if (ret < 0) {
2559  av_log(avctx, AV_LOG_ERROR,
2560  "mpeg_decode_postinit() failure\n");
2561  return ret;
2562  }
2563 
2564  /* We have a complete image: we try to decompress it. */
2565  if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2566  s2->pict_type = 0;
2567  s->first_slice = 1;
2568  last_code = PICTURE_START_CODE;
2569  } else {
2570  av_log(avctx, AV_LOG_ERROR,
2571  "ignoring pic after %X\n", last_code);
2572  if (avctx->err_recognition & AV_EF_EXPLODE)
2573  return AVERROR_INVALIDDATA;
2574  }
2575  break;
2576  case EXT_START_CODE:
2577  init_get_bits(&s2->gb, buf_ptr, input_size * 8);
2578 
2579  switch (get_bits(&s2->gb, 4)) {
2580  case 0x1:
2581  if (last_code == 0) {
2583  } else {
2584  av_log(avctx, AV_LOG_ERROR,
2585  "ignoring seq ext after %X\n", last_code);
2586  if (avctx->err_recognition & AV_EF_EXPLODE)
2587  return AVERROR_INVALIDDATA;
2588  }
2589  break;
2590  case 0x2:
2592  break;
2593  case 0x3:
2595  break;
2596  case 0x7:
2598  break;
2599  case 0x8:
2600  if (last_code == PICTURE_START_CODE) {
2602  } else {
2603  av_log(avctx, AV_LOG_ERROR,
2604  "ignoring pic cod ext after %X\n", last_code);
2605  if (avctx->err_recognition & AV_EF_EXPLODE)
2606  return AVERROR_INVALIDDATA;
2607  }
2608  break;
2609  }
2610  break;
2611  case USER_START_CODE:
2612  mpeg_decode_user_data(avctx, buf_ptr, input_size);
2613  break;
2614  case GOP_START_CODE:
2615  if (last_code == 0) {
2616  s2->first_field = 0;
2617  mpeg_decode_gop(avctx, buf_ptr, input_size);
2618  s->sync = 1;
2619  } else {
2620  av_log(avctx, AV_LOG_ERROR,
2621  "ignoring GOP_START_CODE after %X\n", last_code);
2622  if (avctx->err_recognition & AV_EF_EXPLODE)
2623  return AVERROR_INVALIDDATA;
2624  }
2625  break;
2626  default:
2627  if (start_code >= SLICE_MIN_START_CODE &&
2628  start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2629  if (s2->progressive_sequence && !s2->progressive_frame) {
2630  s2->progressive_frame = 1;
2631  av_log(s2->avctx, AV_LOG_ERROR,
2632  "interlaced frame in progressive sequence, ignoring\n");
2633  }
2634 
2635  if (s2->picture_structure == 0 ||
2637  av_log(s2->avctx, AV_LOG_ERROR,
2638  "picture_structure %d invalid, ignoring\n",
2639  s2->picture_structure);
2641  }
2642 
2644  av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2645 
2646  if (s2->picture_structure == PICT_FRAME) {
2647  s2->first_field = 0;
2648  s2->v_edge_pos = 16 * s2->mb_height;
2649  } else {
2650  s2->first_field ^= 1;
2651  s2->v_edge_pos = 8 * s2->mb_height;
2652  memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2653  }
2654  }
2655  if (start_code >= SLICE_MIN_START_CODE &&
2656  start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2657  const int field_pic = s2->picture_structure != PICT_FRAME;
2658  int mb_y = start_code - SLICE_MIN_START_CODE;
2659  last_code = SLICE_MIN_START_CODE;
2660  if (s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2661  mb_y += (*buf_ptr&0xE0)<<2;
2662 
2663  mb_y <<= field_pic;
2665  mb_y++;
2666 
2667  if (buf_end - buf_ptr < 2) {
2668  av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2669  return AVERROR_INVALIDDATA;
2670  }
2671 
2672  if (mb_y >= s2->mb_height) {
2673  av_log(s2->avctx, AV_LOG_ERROR,
2674  "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2675  return AVERROR_INVALIDDATA;
2676  }
2677 
2678  if (!s2->last_picture_ptr) {
2679  /* Skip B-frames if we do not have reference frames and
2680  * GOP is not closed. */
2681  if (s2->pict_type == AV_PICTURE_TYPE_B) {
2682  if (!s2->closed_gop) {
2683  skip_frame = 1;
2684  av_log(s2->avctx, AV_LOG_DEBUG,
2685  "Skipping B slice due to open GOP\n");
2686  break;
2687  }
2688  }
2689  }
2691  s->sync = 1;
2692  if (!s2->next_picture_ptr) {
2693  /* Skip P-frames if we do not have a reference frame or
2694  * we have an invalid header. */
2695  if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2696  skip_frame = 1;
2697  av_log(s2->avctx, AV_LOG_DEBUG,
2698  "Skipping P slice due to !sync\n");
2699  break;
2700  }
2701  }
2702  if ((avctx->skip_frame >= AVDISCARD_NONREF &&
2703  s2->pict_type == AV_PICTURE_TYPE_B) ||
2704  (avctx->skip_frame >= AVDISCARD_NONKEY &&
2705  s2->pict_type != AV_PICTURE_TYPE_I) ||
2706  avctx->skip_frame >= AVDISCARD_ALL) {
2707  skip_frame = 1;
2708  break;
2709  }
2710 
2711  if (!s->mpeg_enc_ctx_allocated)
2712  break;
2713 
2714  if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2715  if (mb_y < avctx->skip_top ||
2716  mb_y >= s2->mb_height - avctx->skip_bottom)
2717  break;
2718  }
2719 
2720  if (!s2->pict_type) {
2721  av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2722  if (avctx->err_recognition & AV_EF_EXPLODE)
2723  return AVERROR_INVALIDDATA;
2724  break;
2725  }
2726 
2727  if (s->first_slice) {
2728  skip_frame = 0;
2729  s->first_slice = 0;
2730  if ((ret = mpeg_field_start(s2, buf, buf_size)) < 0)
2731  return ret;
2732  }
2733  if (!s2->current_picture_ptr) {
2734  av_log(avctx, AV_LOG_ERROR,
2735  "current_picture not initialized\n");
2736  return AVERROR_INVALIDDATA;
2737  }
2738 
2739  if (HAVE_THREADS &&
2740  (avctx->active_thread_type & FF_THREAD_SLICE) &&
2741  !avctx->hwaccel) {
2742  int threshold = (s2->mb_height * s->slice_count +
2743  s2->slice_context_count / 2) /
2744  s2->slice_context_count;
2745  av_assert0(avctx->thread_count > 1);
2746  if (threshold <= mb_y) {
2747  MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2748 
2749  thread_context->start_mb_y = mb_y;
2750  thread_context->end_mb_y = s2->mb_height;
2751  if (s->slice_count) {
2752  s2->thread_context[s->slice_count - 1]->end_mb_y = mb_y;
2753  ret = ff_update_duplicate_context(thread_context, s2);
2754  if (ret < 0)
2755  return ret;
2756  }
2757  init_get_bits(&thread_context->gb, buf_ptr, input_size * 8);
2758  s->slice_count++;
2759  }
2760  buf_ptr += 2; // FIXME add minimum number of bytes per slice
2761  } else {
2762  ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2763  emms_c();
2764 
2765  if (ret < 0) {
2766  if (avctx->err_recognition & AV_EF_EXPLODE)
2767  return ret;
2768  if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2769  ff_er_add_slice(&s2->er, s2->resync_mb_x,
2770  s2->resync_mb_y, s2->mb_x, s2->mb_y,
2772  } else {
2773  ff_er_add_slice(&s2->er, s2->resync_mb_x,
2774  s2->resync_mb_y, s2->mb_x - 1, s2->mb_y,
2776  }
2777  }
2778  }
2779  break;
2780  }
2781  }
2782 }
2783 
2784 static int mpeg_decode_frame(AVCodecContext *avctx, void *data,
2785  int *got_output, AVPacket *avpkt)
2786 {
2787  const uint8_t *buf = avpkt->data;
2788  int ret;
2789  int buf_size = avpkt->size;
2790  Mpeg1Context *s = avctx->priv_data;
2791  AVFrame *picture = data;
2793 
2794  if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2795  /* special case for last picture */
2796  if (s2->low_delay == 0 && s2->next_picture_ptr) {
2797  int ret = av_frame_ref(picture, s2->next_picture_ptr->f);
2798  if (ret < 0)
2799  return ret;
2800 
2801  s2->next_picture_ptr = NULL;
2802 
2803  *got_output = 1;
2804  }
2805  return buf_size;
2806  }
2807 
2808  if (s2->avctx->flags & AV_CODEC_FLAG_TRUNCATED) {
2809  int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf,
2810  buf_size, NULL);
2811 
2812  if (ff_combine_frame(&s2->parse_context, next,
2813  (const uint8_t **) &buf, &buf_size) < 0)
2814  return buf_size;
2815  }
2816 
2817  s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2818  if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2819  || s2->codec_tag == AV_RL32("BW10")
2820  ))
2821  vcr2_init_sequence(avctx);
2822 
2823  s->slice_count = 0;
2824 
2825  if (avctx->extradata && !s->extradata_decoded) {
2826  ret = decode_chunks(avctx, picture, got_output,
2827  avctx->extradata, avctx->extradata_size);
2828  if (*got_output) {
2829  av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2830  av_frame_unref(picture);
2831  *got_output = 0;
2832  }
2833  s->extradata_decoded = 1;
2834  if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2835  s2->current_picture_ptr = NULL;
2836  return ret;
2837  }
2838  }
2839 
2840  ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2841  if (ret<0 || *got_output) {
2842  s2->current_picture_ptr = NULL;
2843 
2844  if (s2->timecode_frame_start != -1 && *got_output) {
2845  AVFrameSideData *tcside = av_frame_new_side_data(picture,
2847  sizeof(int64_t));
2848  if (!tcside)
2849  return AVERROR(ENOMEM);
2850  memcpy(tcside->data, &s2->timecode_frame_start, sizeof(int64_t));
2851 
2852  s2->timecode_frame_start = -1;
2853  }
2854  }
2855 
2856  return ret;
2857 }
2858 
2859 static void flush(AVCodecContext *avctx)
2860 {
2861  Mpeg1Context *s = avctx->priv_data;
2862 
2863  s->sync = 0;
2864 
2865  ff_mpeg_flush(avctx);
2866 }
2867 
2869 {
2870  Mpeg1Context *s = avctx->priv_data;
2871 
2872  if (s->mpeg_enc_ctx_allocated)
2874  av_freep(&s->a53_caption);
2875  return 0;
2876 }
2877 
2879  .name = "mpeg1video",
2880  .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2881  .type = AVMEDIA_TYPE_VIDEO,
2882  .id = AV_CODEC_ID_MPEG1VIDEO,
2883  .priv_data_size = sizeof(Mpeg1Context),
2885  .close = mpeg_decode_end,
2890  .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2891  .flush = flush,
2892  .max_lowres = 3,
2893  .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2894 };
2895 
2897  .name = "mpeg2video",
2898  .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2899  .type = AVMEDIA_TYPE_VIDEO,
2900  .id = AV_CODEC_ID_MPEG2VIDEO,
2901  .priv_data_size = sizeof(Mpeg1Context),
2903  .close = mpeg_decode_end,
2908  .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2909  .flush = flush,
2910  .max_lowres = 3,
2912 };
2913 
2914 //legacy decoder
2916  .name = "mpegvideo",
2917  .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2918  .type = AVMEDIA_TYPE_VIDEO,
2919  .id = AV_CODEC_ID_MPEG2VIDEO,
2920  .priv_data_size = sizeof(Mpeg1Context),
2922  .close = mpeg_decode_end,
2925  .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2926  .flush = flush,
2927  .max_lowres = 3,
2928 };
static const uint32_t btype2mb_type[11]
Definition: mpeg12dec.c:85
const uint16_t ff_mpeg1_default_non_intra_matrix[64]
Definition: mpeg12data.c:41
static unsigned int show_bits_long(GetBitContext *s, int n)
Show 0-32 bits.
Definition: get_bits.h:397
#define AV_EF_AGGRESSIVE
consider things that a sane encoder should not do as an error
Definition: avcodec.h:2621
#define ff_tlog(ctx,...)
Definition: internal.h:80
IDCTDSPContext idsp
Definition: mpegvideo.h:227
#define NULL
Definition: coverity.c:32
const struct AVCodec * codec
Definition: avcodec.h:1490
AVRational framerate
Definition: avcodec.h:2991
const char const char void * val
Definition: avisynth_c.h:771
discard all frames except keyframes
Definition: avcodec.h:789
int8_t * ref_index[2]
Definition: mpegpicture.h:62
void ff_init_block_index(MpegEncContext *s)
Definition: mpegvideo.c:2516
int64_t timecode_frame_start
GOP timecode frame start number, in non drop frame format.
Definition: mpegvideo.h:457
int(* start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
Called at the beginning of each frame or field picture.
Definition: avcodec.h:3483
int aspect_ratio_info
Definition: mpegvideo.h:397
int picture_number
Definition: mpegvideo.h:124
const char * s
Definition: avisynth_c.h:768
#define MB_TYPE_L1
Definition: mpegutils.h:68
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define SLICE_MAX_START_CODE
Definition: cavs.h:32
#define SLICE_FLAG_ALLOW_FIELD
allow draw_horiz_band() with field slices (MPEG-2 field pics)
Definition: avcodec.h:1960
static int shift(int a, int b)
Definition: sonic.c:82
AVRational av_div_q(AVRational b, AVRational c)
Divide one rational by another.
Definition: rational.c:88
MPEG-2/4 4:2:0, H.264 default for 4:2:0.
Definition: pixfmt.h:513
#define MAX_INDEX
Definition: mpeg12dec.c:126
This structure describes decoded (raw) audio or video data.
Definition: frame.h:201
static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm, const uint8_t *new_perm)
Definition: mpeg12dec.c:1120
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
int start_mb_y
start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y) ...
Definition: mpegvideo.h:150
#define MV_TYPE_FIELD
2 vectors, one per field
Definition: mpegvideo.h:266
int last_mv[2][2][2]
last MV, used for MV prediction in MPEG-1 & B-frame MPEG-4
Definition: mpegvideo.h:275
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:1668
float re
Definition: fft.c:82
static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
Definition: mpeg12dec.c:1448
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:67
misc image utilities
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:261
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
av_cold void ff_mpeg12_init_vlcs(void)
Definition: mpeg12.c:137
int64_t bit_rate
the average bitrate
Definition: avcodec.h:1531
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
Definition: utils.c:194
uint8_t afd
Definition: mpeg12dec.c:61
hardware decoding through Videotoolbox
Definition: pixfmt.h:278
int end_mb_y
end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y) ...
Definition: mpegvideo.h:151
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
uint8_t * a53_caption
Definition: mpeg12dec.c:59
uint16_t chroma_intra_matrix[64]
Definition: mpegvideo.h:298
const uint8_t ff_reverse[256]
Definition: reverse.c:23
int height
Definition: avcodec.h:1066
int v_edge_pos
horizontal / vertical position of the right/bottom edge (pixel replication)
Definition: mpegvideo.h:129
uint16_t chroma_inter_matrix[64]
Definition: mpegvideo.h:300
void ff_er_frame_end(ERContext *s)
static int mpeg2_fast_decode_block_non_intra(MpegEncContext *s, int16_t *block, int n)
Note: this function can read out of range and crash for corrupt streams.
Definition: mpeg12dec.c:402
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: avcodec.h:2111
static int check_marker(void *logctx, GetBitContext *s, const char *msg)
Definition: get_bits.h:407
int num
Numerator.
Definition: rational.h:59
int repeat_pict
When decoding, this signals how much the picture must be delayed.
Definition: frame.h:343
Views are next to each other, but when upscaling apply a checkerboard pattern.
Definition: stereo3d.h:117
int size
Definition: avcodec.h:1400
enum AVCodecID codec_id
Definition: mpegvideo.h:109
#define AV_EF_COMPLIANT
consider all spec non compliances as errors
Definition: avcodec.h:2620
void(* clear_blocks)(int16_t *blocks)
Definition: blockdsp.h:37
static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
Definition: mpeg12dec.c:1543
const uint8_t * buffer
Definition: get_bits.h:56
void ff_mpeg1_clean_buffers(MpegEncContext *s)
Definition: mpeg12.c:115
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel...
Definition: avcodec.h:1859
#define MB_TYPE_INTRA
Definition: mpegutils.h:73
AVCodec ff_mpeg1video_decoder
Definition: mpeg12dec.c:2878
char * av_timecode_make_mpeg_tc_string(char *buf, uint32_t tc25bit)
Get the timecode string from the 25-bit timecode format (MPEG GOP format).
Definition: timecode.c:130
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1690
#define tc
Definition: regdef.h:69
#define MB_TYPE_16x8
Definition: mpegutils.h:55
static av_cold int mpeg_decode_init(AVCodecContext *avctx)
Definition: mpeg12dec.c:1064
#define AV_EF_BITSTREAM
detect bitstream specification deviations
Definition: avcodec.h:2614
mpegvideo header.
#define HAS_CBP(a)
Definition: mpegutils.h:101
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
discard all
Definition: avcodec.h:790
uint8_t permutated[64]
Definition: idctdsp.h:33
Views are next to each other.
Definition: stereo3d.h:67
uint8_t run
Definition: svq3.c:206
#define ER_MV_ERROR
static void mpeg_decode_gop(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
Definition: mpeg12dec.c:2425
#define SLICE_MIN_START_CODE
Definition: mpegvideo.h:70
int profile
profile
Definition: avcodec.h:2806
AVCodec.
Definition: avcodec.h:3289
static int get_dmv(MpegEncContext *s)
Definition: mpeg12dec.c:643
int qscale
QP.
Definition: mpegvideo.h:201
RLTable.
Definition: rl.h:39
static int get_sbits(GetBitContext *s, int n)
Definition: get_bits.h:246
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:42
int chroma_x_shift
Definition: mpegvideo.h:473
int encoding
true if we are encoding (vs decoding)
Definition: mpegvideo.h:111
int field_select[2][2]
Definition: mpegvideo.h:274
Macro definitions for various function/variable attributes.
enum AVDiscard skip_frame
Skip decoding for selected frames.
Definition: avcodec.h:2926
const uint8_t ff_mpeg2_non_linear_qscale[32]
Definition: mpegvideodata.c:27
static int16_t block[64]
Definition: dct.c:115
struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:2637
#define AV_CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: avcodec.h:980
#define USES_LIST(a, list)
Definition: mpegutils.h:99
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h)
Definition: mpegvideo.c:2509
#define MBINCR_VLC_BITS
Definition: mpeg12vlc.h:37
static const uint32_t ptype2mb_type[7]
Definition: mpeg12dec.c:75
uint8_t
#define av_cold
Definition: attributes.h:82
#define av_malloc(s)
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:64
RLTable ff_rl_mpeg2
Definition: mpeg12data.c:174
Stereo 3D type: this structure describes how two videos are packed within a single video surface...
Definition: stereo3d.h:157
enum OutputFormat out_format
output format
Definition: mpegvideo.h:101
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:2562
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
const float ff_mpeg1_aspect[16]
Definition: mpeg12data.c:374
Multithreading support functions.
#define AV_CODEC_FLAG_LOW_DELAY
Force low delay.
Definition: avcodec.h:874
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:400
static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra)
Definition: mpeg12dec.c:1506
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1581
int full_pel[2]
Definition: mpegvideo.h:477
int interlaced_dct
Definition: mpegvideo.h:478
#define MB_TYPE_16x16
Definition: mpegutils.h:54
static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
Definition: mpeg12dec.c:1183
static int mpeg1_fast_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
Note: this function can read out of range and crash for corrupt streams.
Definition: mpeg12dec.c:226
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
Picture current_picture
copy of the current picture structure.
Definition: mpegvideo.h:177
int first_slice
Definition: mpeg12dec.c:69
The data is the AVPanScan struct defined in libavcodec.
Definition: frame.h:52
int intra_dc_precision
Definition: mpegvideo.h:458
int repeat_first_field
Definition: mpegvideo.h:467
void ff_xvmc_init_block(MpegEncContext *s)
Initialize the block field of the MpegEncContext pointer passed as parameter after making sure that t...
Structure to hold side data for an AVFrame.
Definition: frame.h:163
int av_image_check_sar(unsigned int w, unsigned int h, AVRational sar)
Check if the given sample aspect ratio of an image is valid.
Definition: imgutils.c:287
#define PICT_BOTTOM_FIELD
Definition: mpegutils.h:38
#define height
uint8_t * data
Definition: avcodec.h:1399
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:199
static int flags
Definition: log.c:57
void ff_xvmc_pack_pblocks(MpegEncContext *s, int cbp)
Fill individual block pointers, so there are no gaps in the data_block array in case not all blocks i...
#define ER_MV_END
#define ff_dlog(a,...)
av_cold void ff_mpv_idct_init(MpegEncContext *s)
Definition: mpegvideo.c:330
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:126
int lowres
low resolution decoding, 1-> 1/2 size, 2->1/4 size
Definition: avcodec.h:2712
Video is not stereoscopic (and metadata has to be there).
Definition: stereo3d.h:55
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
Definition: rational.c:35
int codec_tag
internal codec_tag upper case converted from avctx codec_tag
Definition: mpegvideo.h:117
void ff_thread_finish_setup(AVCodecContext *avctx)
If the codec defines update_thread_context(), call this when they are ready for the next thread to st...
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:857
Active Format Description data consisting of a single byte as specified in ETSI TS 101 154 using AVAc...
Definition: frame.h:89
VLC ff_mv_vlc
Definition: mpeg12.c:127
enum AVChromaLocation chroma_sample_location
This defines the location of chroma samples.
Definition: avcodec.h:2118
#define FFALIGN(x, a)
Definition: macros.h:48
#define av_log(a,...)
const uint8_t * avpriv_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state)
#define FF_IDCT_AUTO
Definition: avcodec.h:2677
#define MB_TYPE_QUANT
Definition: mpegutils.h:70
static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
Definition: mpeg12dec.c:1204
Libavcodec version macros.
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:587
enum AVCodecID id
Definition: avcodec.h:3303
int slice_context_count
number of used thread_contexts
Definition: mpegvideo.h:153
int extradata_decoded
Definition: mpeg12dec.c:70
#define UPDATE_CACHE(name, gb)
Definition: get_bits.h:160
#define FF_IDCT_NONE
Definition: avcodec.h:2689
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int has_b_frames
Size of the frame reordering buffer in the decoder.
Definition: avcodec.h:1770
int last_dc[3]
last DC values for MPEG-1
Definition: mpegvideo.h:182
#define s2
Definition: regdef.h:39
void ff_er_add_slice(ERContext *s, int startx, int starty, int endx, int endy, int status)
Add a slice.
#define MT_FIELD
Definition: mpeg12dec.c:662
#define PTRDIFF_SPECIFIER
Definition: internal.h:261
int mb_skipped
MUST BE SET only during DECODING.
Definition: mpegvideo.h:192
int chroma_y_shift
Definition: mpegvideo.h:474
int ff_combine_frame(ParseContext *pc, int next, const uint8_t **buf, int *buf_size)
Combine the (truncated) bitstream to a complete frame.
Definition: parser.c:251
#define AVERROR(e)
Definition: error.h:43
static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
Definition: mpeg12dec.c:1405
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
ERContext er
Definition: mpegvideo.h:548
static int mpeg1_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
Definition: mpeg12dec.c:136
int active_thread_type
Which multithreading methods are in use by the codec.
Definition: avcodec.h:2751
AVCodec ff_mpegvideo_decoder
Definition: mpeg12dec.c:2915
#define MB_TYPE_CBP
Definition: mpegutils.h:71
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
ATSC A53 Part 4 Closed Captions.
Definition: frame.h:58
static int get_qscale(MpegEncContext *s)
Definition: mpeg12dec.c:651
const char * arg
Definition: jacosubdec.c:66
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1561
#define wrap(func)
Definition: neontest.h:65
uint16_t width
Definition: gdv.c:47
#define SEQ_END_CODE
Definition: mpegvideo.h:66
#define PICT_TOP_FIELD
Definition: mpegutils.h:37
const char * name
Name of the codec implementation.
Definition: avcodec.h:3296
static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
Definition: mpeg12dec.c:100
int width
width and height in 1/16 pel
Definition: avcodec.h:1065
int low_delay
no reordering needed / has no B-frames
Definition: mpegvideo.h:401
static void mpeg_decode_user_data(AVCodecContext *avctx, const uint8_t *p, int buf_size)
Definition: mpeg12dec.c:2355
GetBitContext gb
Definition: mpegvideo.h:443
The GOP timecode in 25 bit timecode format.
Definition: frame.h:124
#define CLOSE_READER(name, gb)
Definition: get_bits.h:131
void ff_mpv_common_end(MpegEncContext *s)
Definition: mpegvideo.c:1116
VLC ff_mb_pat_vlc
Definition: mpeg12.c:135
#define FFMAX(a, b)
Definition: common.h:94
static int decode_dc(GetBitContext *gb, int component)
Definition: mpeg12.h:41
int repeat_field
Definition: mpeg12dec.c:55
attribute_deprecated int64_t timecode_frame_start
Definition: avcodec.h:2438
#define DECODE_SLICE_ERROR
Definition: mpeg12dec.c:1701
#define GET_RL_VLC(level, run, name, gb, table, bits,max_depth, need_update)
Definition: get_bits.h:509
#define DECODE_SLICE_OK
Definition: mpeg12dec.c:1702
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:66
void ff_mpeg_flush(AVCodecContext *avctx)
Definition: mpegvideo.c:2548
XVideo Motion Acceleration via common packet passing.
Definition: pixfmt.h:269
#define SKIP_BITS(name, gb, num)
Definition: get_bits.h:175
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:225
int resync_mb_x
x position of last resync marker
Definition: mpegvideo.h:353
int rc_buffer_size
decoder bitstream buffer size
Definition: avcodec.h:2339
AVStereo3D * av_stereo3d_create_side_data(AVFrame *frame)
Allocate a complete AVFrameSideData and add it to the frame.
Definition: stereo3d.c:33
common internal API header
#define ER_AC_ERROR
static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
Definition: mpeg12dec.c:1602
int intra_vlc_format
Definition: mpegvideo.h:464
const AVProfile ff_mpeg2_video_profiles[]
Definition: profiles.c:95
#define AV_CODEC_CAP_DRAW_HORIZ_BAND
Decoder can use draw_horiz_band callback.
Definition: avcodec.h:949
static int mpeg2_decode_block_non_intra(MpegEncContext *s, int16_t *block, int n)
Definition: mpeg12dec.c:311
int ff_mpv_export_qp_table(MpegEncContext *s, AVFrame *f, Picture *p, int qp_type)
Definition: mpegvideo.c:1743
int progressive_frame
Definition: mpegvideo.h:476
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:284
#define MB_PAT_VLC_BITS
Definition: mpeg12vlc.h:38
int top_field_first
Definition: mpegvideo.h:460
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:2605
#define FF_THREAD_FRAME
Decode more than one frame at once.
Definition: avcodec.h:2743
#define FFMIN(a, b)
Definition: common.h:96
int last_index
Definition: parser.h:31
static int vcr2_init_sequence(AVCodecContext *avctx)
Definition: mpeg12dec.c:2176
uint8_t * mbskip_table
used to avoid copy if macroblock skipped (for black regions for example) and used for B-frame encodin...
Definition: mpegvideo.h:193
int idct_algo
IDCT algorithm, see FF_IDCT_* below.
Definition: avcodec.h:2676
int16_t(*[2] motion_val)[2]
Definition: mpegpicture.h:53
Picture * current_picture_ptr
pointer to the current picture
Definition: mpegvideo.h:181
void ff_mpeg_er_frame_start(MpegEncContext *s)
Definition: mpeg_er.c:46
#define ER_DC_END
static int mpeg_decode_a53_cc(AVCodecContext *avctx, const uint8_t *p, int buf_size)
Definition: mpeg12dec.c:2230
RLTable ff_rl_mpeg1
Definition: mpeg12data.c:166
ITU-R 601, SMPTE 274M 296M S314M(DV 4:1:1), mpeg2 4:2:2.
Definition: pixfmt.h:515
int alternate_scan
Definition: mpegvideo.h:465
int save_height
Definition: mpeg12dec.c:65
#define MB_BTYPE_VLC_BITS
Definition: mpeg12vlc.h:40
#define GOP_START_CODE
Definition: mpegvideo.h:68
int32_t
AVFormatContext * ctx
Definition: movenc.c:48
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:2090
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:296
int a53_caption_size
Definition: mpeg12dec.c:60
#define FF_THREAD_SLICE
Decode more than one part of a single frame at once.
Definition: avcodec.h:2744
int level
level
Definition: avcodec.h:2904
#define LAST_SKIP_BITS(name, gb, num)
Definition: get_bits.h:181
static av_cold int mpeg_decode_end(AVCodecContext *avctx)
Definition: mpeg12dec.c:2868
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:554
static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
Definition: mpeg12dec.c:1529
int16_t(*[12] pblocks)[64]
Definition: mpegvideo.h:493
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:83
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2616
int n
Definition: avisynth_c.h:684
uint8_t idct_permutation[64]
IDCT input permutation.
Definition: idctdsp.h:96
int ticks_per_frame
For some codecs, the time base is closer to the field rate than the frame rate.
Definition: avcodec.h:1612
int mpeg_f_code[2][2]
Definition: mpegvideo.h:452
#define EXT_START_CODE
Definition: cavs.h:33
int mpeg_enc_ctx_allocated
Definition: mpeg12dec.c:54
#define check_scantable_index(ctx, x)
Definition: mpeg12dec.c:127
#define MB_TYPE_INTERLACED
Definition: mpegutils.h:58
HW acceleration through CUDA.
Definition: pixfmt.h:231
int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
Definition: mpegvideo.c:483
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:219
RL_VLC_ELEM * rl_vlc[32]
decoding only
Definition: rl.h:48
#define SHOW_UBITS(name, gb, num)
Definition: get_bits.h:193
void ff_mpv_decode_defaults(MpegEncContext *s)
Set the given MpegEncContext to defaults for decoding.
Definition: mpegvideo.c:657
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:2732
static int mpeg1_decode_sequence(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
Definition: mpeg12dec.c:2087
static const float pred[4]
Definition: siprdata.h:259
AVRational save_aspect
Definition: mpeg12dec.c:64
int first_field
is 1 for the first field of a field picture 0 otherwise
Definition: mpegvideo.h:479
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:1015
int save_width
Definition: mpeg12dec.c:65
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:263
#define MV_VLC_BITS
Definition: ituh263dec.c:54
int frame_pred_frame_dct
Definition: mpegvideo.h:459
static int mpeg2_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
Definition: mpeg12dec.c:474
enum AVStereo3DType type
How views are packed within the video.
Definition: stereo3d.h:161
uint16_t inter_matrix[64]
Definition: mpegvideo.h:299
uint8_t * buffer
Definition: parser.h:29
static enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[]
Definition: mpeg12dec.c:1146
int concealment_motion_vectors
Definition: mpegvideo.h:461
struct MpegEncContext * thread_context[MAX_THREADS]
Definition: mpegvideo.h:152
Libavcodec external API header.
Views are on top of each other.
Definition: stereo3d.h:79
AVRational frame_rate_ext
Definition: mpeg12dec.c:66
enum AVCodecID codec_id
Definition: avcodec.h:1491
BlockDSPContext bdsp
Definition: mpegvideo.h:223
static int mpeg2_fast_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
Note: this function can read out of range and crash for corrupt streams.
Definition: mpeg12dec.c:564
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:232
#define AV_CODEC_FLAG2_FAST
Allow non spec compliant speedup tricks.
Definition: avcodec.h:897
int debug
debug
Definition: avcodec.h:2561
#define MB_PTYPE_VLC_BITS
Definition: mpeg12vlc.h:39
main external API structure.
Definition: avcodec.h:1481
ScanTable intra_scantable
Definition: mpegvideo.h:88
#define USER_START_CODE
Definition: cavs.h:34
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:97
#define IS_QUANT(a)
Definition: mpegutils.h:95
MPEG-1/2 tables.
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1506
#define OPEN_READER(name, gb)
Definition: get_bits.h:120
uint8_t * data
Definition: frame.h:165
#define MV_TYPE_16X8
2 vectors, one per 16x8 block
Definition: mpegvideo.h:265
int chroma_420_type
Definition: mpegvideo.h:468
void * buf
Definition: avisynth_c.h:690
static int mpeg_decode_slice(MpegEncContext *s, int mb_y, const uint8_t **buf, int buf_size)
Decode a slice.
Definition: mpeg12dec.c:1710
void ff_print_debug_info(MpegEncContext *s, Picture *p, AVFrame *pict)
Definition: mpegvideo.c:1736
int extradata_size
Definition: avcodec.h:1582
int progressive_sequence
Definition: mpegvideo.h:451
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:313
static void skip_bits1(GetBitContext *s)
Definition: get_bits.h:338
int slice_flags
slice flags
Definition: avcodec.h:1958
int coded_height
Definition: avcodec.h:1668
#define FF_CODEC_PROPERTY_CLOSED_CAPTIONS
Definition: avcodec.h:3114
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:306
static const AVProfile profiles[]
AVFrameSideData * av_frame_new_side_data(AVFrame *frame, enum AVFrameSideDataType type, int size)
Add a new side data to a frame.
Definition: frame.c:680
int closed_gop
MPEG1/2 GOP is closed.
Definition: mpegvideo.h:208
int has_stereo3d
Definition: mpeg12dec.c:58
VLC ff_mb_ptype_vlc
Definition: mpeg12.c:133
unsigned int avpriv_toupper4(unsigned int x)
Definition: utils.c:1997
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:2104
Rational number (pair of numerator and denominator).
Definition: rational.h:58
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:2097
struct AVFrame * f
Definition: mpegpicture.h:46
HW acceleration through VDPAU, Picture.data[3] contains a VdpVideoSurface.
Definition: pixfmt.h:193
static enum AVPixelFormat mpeg12_pixfmt_list_422[]
Definition: mpeg12dec.c:1173
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:425
#define GET_CACHE(name, gb)
Definition: get_bits.h:197
const uint16_t ff_mpeg1_default_intra_matrix[256]
Definition: mpeg12data.c:30
int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s)
Find the end of the current frame in the bitstream.
Definition: mpeg12.c:178
int save_progressive_seq
Definition: mpeg12dec.c:65
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:98
#define MT_DMV
Definition: mpeg12dec.c:665
enum AVPixelFormat ff_thread_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
Wrapper around get_format() for frame-multithreaded codecs.
#define s1
Definition: regdef.h:38
int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx)
generic function called after decoding the header and before a frame is decoded.
Definition: mpegvideo.c:1190
#define ER_DC_ERROR
#define MB_TYPE_SKIP
Definition: mpegutils.h:62
HW decoding through DXVA2, Picture.data[3] contains a LPDIRECT3DSURFACE9 pointer. ...
Definition: pixfmt.h:133
static int mpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_output, AVPacket *avpkt)
Definition: mpeg12dec.c:2784
#define MV_DIR_FORWARD
Definition: mpegvideo.h:259
static int decode_chunks(AVCodecContext *avctx, AVFrame *picture, int *got_output, const uint8_t *buf, int buf_size)
Definition: mpeg12dec.c:2458
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:209
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:266
av_cold void ff_mpeg12_common_init(MpegEncContext *s)
Definition: mpeg12.c:107
#define AV_CODEC_CAP_TRUNCATED
Definition: avcodec.h:956
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:130
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:510
int skip_bottom
Number of macroblock rows at the bottom which are skipped.
Definition: avcodec.h:2016
Pan Scan area.
Definition: avcodec.h:1052
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:215
uint8_t level
Definition: svq3.c:207
AVRational av_d2q(double d, int max)
Convert a double precision floating point number to a rational.
Definition: rational.c:106
int mv[2][4][2]
motion vectors for a macroblock first coordinate : 0 = forward 1 = backward second " : depend...
Definition: mpegvideo.h:273
#define FF_QSCALE_TYPE_MPEG2
Definition: internal.h:87
int b8_stride
2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
Definition: mpegvideo.h:128
Hardware surfaces for Direct3D11.
Definition: pixfmt.h:309
the normal 219*2^(n-8) "MPEG" YUV ranges
Definition: pixfmt.h:491
MpegEncContext.
Definition: mpegvideo.h:78
Picture * next_picture_ptr
pointer to the next picture (for bidir pred)
Definition: mpegvideo.h:180
struct AVCodecContext * avctx
Definition: mpegvideo.h:95
#define SHOW_SBITS(name, gb, num)
Definition: get_bits.h:194
static int av_cmp_q(AVRational a, AVRational b)
Compare two rationals.
Definition: rational.h:89
int ff_mpeg1_decode_block_intra(GetBitContext *gb, const uint16_t *quant_matrix, uint8_t *const scantable, int last_dc[3], int16_t *block, int index, int qscale)
Definition: mpeg12.c:240
discard all non reference
Definition: avcodec.h:786
const AVRational ff_mpeg2_aspect[16]
Definition: mpeg12data.c:395
volatile int error_count
static enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[]
Definition: mpeg12dec.c:1132
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
Y , 8bpp.
Definition: pixfmt.h:70
#define MB_TYPE_L0L1
Definition: mpegutils.h:69
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
common internal api header.
int mb_stride
mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11 ...
Definition: mpegvideo.h:127
void ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx)
Definition: mpegvideo.c:662
if(ret< 0)
Definition: vf_mcdeint.c:279
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
#define FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM
The decoder extracts and fills its parameters even if the frame is skipped due to the skip_frame sett...
Definition: internal.h:60
AVCodec ff_mpeg2video_decoder
Definition: mpeg12dec.c:2896
#define TEX_VLC_BITS
Definition: dv.h:96
static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
Definition: mpeg12dec.c:667
uint8_t * dest[3]
Definition: mpegvideo.h:292
static double c[64]
const uint8_t * buffer_end
Definition: get_bits.h:56
static void flush(AVCodecContext *avctx)
Definition: mpeg12dec.c:2859
VLC ff_mbincr_vlc
Definition: mpeg12.c:132
Picture * last_picture_ptr
pointer to the previous picture.
Definition: mpegvideo.h:179
Bi-dir predicted.
Definition: avutil.h:276
Stereoscopic video.
static int mpeg1_decode_picture(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
Definition: mpeg12dec.c:1358
unsigned properties
Properties of the stream that gets decoded.
Definition: avcodec.h:3112
int den
Denominator.
Definition: rational.h:60
const uint8_t ff_alternate_vertical_scan[64]
int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src)
Definition: mpegvideo.c:455
AVStereo3D stereo3d
Definition: mpeg12dec.c:57
static int lowres
Definition: ffplay.c:331
#define IS_INTRA(x, y)
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2036
int16_t position[3][2]
position of the top left corner in 1/16 pel for up to 3 fields/frames
Definition: avcodec.h:1073
void * priv_data
Definition: avcodec.h:1508
#define PICT_FRAME
Definition: mpegutils.h:39
int frame_rate_index
Definition: mpegvideo.h:214
av_cold int ff_mpv_common_init(MpegEncContext *s)
init common structure for both encoder and decoder.
Definition: mpegvideo.c:877
static int mpeg_decode_postinit(AVCodecContext *avctx)
Definition: mpeg12dec.c:1221
static av_always_inline int diff(const uint32_t a, const uint32_t b)
int picture_structure
Definition: mpegvideo.h:455
av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
Definition: idctdsp.c:29
#define FF_DEBUG_STARTCODE
Definition: avcodec.h:2575
int(* execute)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size)
The codec may call this to execute several independent things.
Definition: avcodec.h:2772
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:85
void ff_mpv_frame_end(MpegEncContext *s)
Definition: mpegvideo.c:1414
#define MT_FRAME
Definition: mpeg12dec.c:663
#define MV_TYPE_DMV
2 vectors, special mpeg2 Dual Prime Vectors
Definition: mpegvideo.h:267
void ff_mpv_reconstruct_mb(MpegEncContext *s, int16_t block[12][64])
Definition: mpegvideo.c:2497
#define SEQ_START_CODE
Definition: mpegvideo.h:67
int resync_mb_y
y position of last resync marker
Definition: mpegvideo.h:354
int16_t(* block)[64]
points to one of the following blocks
Definition: mpegvideo.h:495
ParseContext parse_context
Definition: mpegvideo.h:359
VLC_TYPE(* table)[2]
code, bits
Definition: vlc.h:28
int64_t bit_rate
wanted bit rate
Definition: mpegvideo.h:100
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:279
static const uint8_t * align_get_bits(GetBitContext *s)
Definition: get_bits.h:464
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:1568
MpegEncContext mpeg_enc_ctx
Definition: mpeg12dec.c:53
int slice_count
Definition: mpeg12dec.c:63
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> dc
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
#define MB_TYPE_ZERO_MV
Definition: mpeg12dec.c:73
#define AV_CODEC_FLAG_TRUNCATED
Input bitstream might be truncated at a random location instead of only at frame boundaries.
Definition: avcodec.h:866
#define AV_CODEC_FLAG2_SHOW_ALL
Show all frames before the first keyframe.
Definition: avcodec.h:925
uint16_t intra_matrix[64]
matrix transmitted in the bitstream
Definition: mpegvideo.h:297
uint32_t * mb_type
types and macros are defined in mpegutils.h
Definition: mpegpicture.h:56
#define av_freep(p)
ScanTable inter_scantable
if inter == intra then intra should be used to reduce the cache usage
Definition: mpegvideo.h:87
#define PICTURE_START_CODE
Definition: mpegvideo.h:69
static int skip_1stop_8data_bits(GetBitContext *gb)
Definition: get_bits.h:592
static const uint8_t start_code[]
HW decoding through Direct3D11 via old API, Picture.data[3] contains a ID3D11VideoDecoderOutputView p...
Definition: pixfmt.h:225
MPEG-1 4:2:0, JPEG 4:2:0, H.263 4:2:0.
Definition: pixfmt.h:514
#define ER_AC_END
int(* decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
Callback for each slice.
Definition: avcodec.h:3511
static int slice_decode_thread(AVCodecContext *c, void *arg)
Definition: mpeg12dec.c:1985
int(* end_frame)(AVCodecContext *avctx)
Called at the end of each frame or field picture.
Definition: avcodec.h:3522
static enum AVPixelFormat mpeg12_pixfmt_list_444[]
Definition: mpeg12dec.c:1178
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
This structure stores compressed data.
Definition: avcodec.h:1376
void ff_mpv_report_decode_progress(MpegEncContext *s)
Definition: mpegvideo.c:2593
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:955
#define MB_TYPE_L0
Definition: mpegutils.h:67
static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
Definition: mpeg12dec.c:1472
Predicted.
Definition: avutil.h:275
#define AV_TIMECODE_STR_SIZE
Definition: timecode.h:33
int64_t rc_max_rate
maximum bitrate
Definition: avcodec.h:2354
const AVRational ff_mpeg12_frame_rate_tab[]
AVPanScan pan_scan
Definition: mpeg12dec.c:56
VLC ff_mb_btype_vlc
Definition: mpeg12.c:134