FFmpeg  4.3
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 "hwconfig.h"
40 #include "idctdsp.h"
41 #include "internal.h"
42 #include "mpeg_er.h"
43 #include "mpeg12.h"
44 #include "mpeg12data.h"
45 #include "mpegutils.h"
46 #include "mpegvideo.h"
47 #include "mpegvideodata.h"
48 #include "profiles.h"
49 #include "thread.h"
50 #include "version.h"
51 #include "xvmc_internal.h"
52 
53 typedef struct Mpeg1Context {
55  int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
56  int repeat_field; /* true if we must repeat the field */
57  AVPanScan pan_scan; /* some temporary storage for the panscan */
63  int has_afd;
68  AVRational frame_rate_ext; /* MPEG-2 specific framerate modificator */
69  int sync; /* Did we reach a sync point like a GOP/SEQ/KEYFrame? */
70  int tmpgexs;
73 } Mpeg1Context;
74 
75 #define MB_TYPE_ZERO_MV 0x20000000
76 
77 static const uint32_t ptype2mb_type[7] = {
80  MB_TYPE_L0,
81  MB_TYPE_L0 | MB_TYPE_CBP,
84  MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
85 };
86 
87 static const uint32_t btype2mb_type[11] = {
89  MB_TYPE_L1,
90  MB_TYPE_L1 | MB_TYPE_CBP,
91  MB_TYPE_L0,
92  MB_TYPE_L0 | MB_TYPE_CBP,
94  MB_TYPE_L0L1 | MB_TYPE_CBP,
96  MB_TYPE_QUANT | MB_TYPE_L1 | MB_TYPE_CBP,
97  MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
98  MB_TYPE_QUANT | MB_TYPE_L0L1 | MB_TYPE_CBP,
99 };
100 
101 /* as H.263, but only 17 codes */
102 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
103 {
104  int code, sign, val, shift;
105 
106  code = get_vlc2(&s->gb, ff_mv_vlc.table, MV_VLC_BITS, 2);
107  if (code == 0)
108  return pred;
109  if (code < 0)
110  return 0xffff;
111 
112  sign = get_bits1(&s->gb);
113  shift = fcode - 1;
114  val = code;
115  if (shift) {
116  val = (val - 1) << shift;
117  val |= get_bits(&s->gb, shift);
118  val++;
119  }
120  if (sign)
121  val = -val;
122  val += pred;
123 
124  /* modulo decoding */
125  return sign_extend(val, 5 + shift);
126 }
127 
128 #define MAX_INDEX (64 - 1)
129 #define check_scantable_index(ctx, x) \
130  do { \
131  if ((x) > MAX_INDEX) { \
132  av_log(ctx->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", \
133  ctx->mb_x, ctx->mb_y); \
134  return AVERROR_INVALIDDATA; \
135  } \
136  } while (0)
137 
139  int16_t *block, int n)
140 {
141  int level, i, j, run;
142  RLTable *rl = &ff_rl_mpeg1;
143  uint8_t *const scantable = s->intra_scantable.permutated;
144  const uint16_t *quant_matrix = s->inter_matrix;
145  const int qscale = s->qscale;
146 
147  {
148  OPEN_READER(re, &s->gb);
149  i = -1;
150  // special case for first coefficient, no need to add second VLC table
151  UPDATE_CACHE(re, &s->gb);
152  if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
153  level = (3 * qscale * quant_matrix[0]) >> 5;
154  level = (level - 1) | 1;
155  if (GET_CACHE(re, &s->gb) & 0x40000000)
156  level = -level;
157  block[0] = level;
158  i++;
159  SKIP_BITS(re, &s->gb, 2);
160  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
161  goto end;
162  }
163  /* now quantify & encode AC coefficients */
164  for (;;) {
165  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
166  TEX_VLC_BITS, 2, 0);
167 
168  if (level != 0) {
169  i += run;
170  if (i > MAX_INDEX)
171  break;
172  j = scantable[i];
173  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
174  level = (level - 1) | 1;
175  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
176  SHOW_SBITS(re, &s->gb, 1);
177  SKIP_BITS(re, &s->gb, 1);
178  } else {
179  /* escape */
180  run = SHOW_UBITS(re, &s->gb, 6) + 1;
181  LAST_SKIP_BITS(re, &s->gb, 6);
182  UPDATE_CACHE(re, &s->gb);
183  level = SHOW_SBITS(re, &s->gb, 8);
184  SKIP_BITS(re, &s->gb, 8);
185  if (level == -128) {
186  level = SHOW_UBITS(re, &s->gb, 8) - 256;
187  SKIP_BITS(re, &s->gb, 8);
188  } else if (level == 0) {
189  level = SHOW_UBITS(re, &s->gb, 8);
190  SKIP_BITS(re, &s->gb, 8);
191  }
192  i += run;
193  if (i > MAX_INDEX)
194  break;
195  j = scantable[i];
196  if (level < 0) {
197  level = -level;
198  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
199  level = (level - 1) | 1;
200  level = -level;
201  } else {
202  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
203  level = (level - 1) | 1;
204  }
205  }
206 
207  block[j] = level;
208  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
209  break;
210  UPDATE_CACHE(re, &s->gb);
211  }
212 end:
213  LAST_SKIP_BITS(re, &s->gb, 2);
214  CLOSE_READER(re, &s->gb);
215  }
216 
217  check_scantable_index(s, i);
218 
219  s->block_last_index[n] = i;
220  return 0;
221 }
222 
223 /**
224  * Changing this would eat up any speed benefits it has.
225  * Do not use "fast" flag if you need the code to be robust.
226  */
228  int16_t *block, int n)
229 {
230  int level, i, j, run;
231  RLTable *rl = &ff_rl_mpeg1;
232  uint8_t *const scantable = s->intra_scantable.permutated;
233  const int qscale = s->qscale;
234 
235  {
236  OPEN_READER(re, &s->gb);
237  i = -1;
238  // Special case for first coefficient, no need to add second VLC table.
239  UPDATE_CACHE(re, &s->gb);
240  if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
241  level = (3 * qscale) >> 1;
242  level = (level - 1) | 1;
243  if (GET_CACHE(re, &s->gb) & 0x40000000)
244  level = -level;
245  block[0] = level;
246  i++;
247  SKIP_BITS(re, &s->gb, 2);
248  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
249  goto end;
250  }
251 
252  /* now quantify & encode AC coefficients */
253  for (;;) {
254  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
255  TEX_VLC_BITS, 2, 0);
256 
257  if (level != 0) {
258  i += run;
259  if (i > MAX_INDEX)
260  break;
261  j = scantable[i];
262  level = ((level * 2 + 1) * qscale) >> 1;
263  level = (level - 1) | 1;
264  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
265  SHOW_SBITS(re, &s->gb, 1);
266  SKIP_BITS(re, &s->gb, 1);
267  } else {
268  /* escape */
269  run = SHOW_UBITS(re, &s->gb, 6) + 1;
270  LAST_SKIP_BITS(re, &s->gb, 6);
271  UPDATE_CACHE(re, &s->gb);
272  level = SHOW_SBITS(re, &s->gb, 8);
273  SKIP_BITS(re, &s->gb, 8);
274  if (level == -128) {
275  level = SHOW_UBITS(re, &s->gb, 8) - 256;
276  SKIP_BITS(re, &s->gb, 8);
277  } else if (level == 0) {
278  level = SHOW_UBITS(re, &s->gb, 8);
279  SKIP_BITS(re, &s->gb, 8);
280  }
281  i += run;
282  if (i > MAX_INDEX)
283  break;
284  j = scantable[i];
285  if (level < 0) {
286  level = -level;
287  level = ((level * 2 + 1) * qscale) >> 1;
288  level = (level - 1) | 1;
289  level = -level;
290  } else {
291  level = ((level * 2 + 1) * qscale) >> 1;
292  level = (level - 1) | 1;
293  }
294  }
295 
296  block[j] = level;
297  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
298  break;
299  UPDATE_CACHE(re, &s->gb);
300  }
301 end:
302  LAST_SKIP_BITS(re, &s->gb, 2);
303  CLOSE_READER(re, &s->gb);
304  }
305 
306  check_scantable_index(s, i);
307 
308  s->block_last_index[n] = i;
309  return 0;
310 }
311 
313  int16_t *block, int n)
314 {
315  int level, i, j, run;
316  RLTable *rl = &ff_rl_mpeg1;
317  uint8_t *const scantable = s->intra_scantable.permutated;
318  const uint16_t *quant_matrix;
319  const int qscale = s->qscale;
320  int mismatch;
321 
322  mismatch = 1;
323 
324  {
325  OPEN_READER(re, &s->gb);
326  i = -1;
327  if (n < 4)
328  quant_matrix = s->inter_matrix;
329  else
330  quant_matrix = s->chroma_inter_matrix;
331 
332  // Special case for first coefficient, no need to add second VLC table.
333  UPDATE_CACHE(re, &s->gb);
334  if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
335  level = (3 * qscale * quant_matrix[0]) >> 5;
336  if (GET_CACHE(re, &s->gb) & 0x40000000)
337  level = -level;
338  block[0] = level;
339  mismatch ^= level;
340  i++;
341  SKIP_BITS(re, &s->gb, 2);
342  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
343  goto end;
344  }
345 
346  /* now quantify & encode AC coefficients */
347  for (;;) {
348  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
349  TEX_VLC_BITS, 2, 0);
350 
351  if (level != 0) {
352  i += run;
353  if (i > MAX_INDEX)
354  break;
355  j = scantable[i];
356  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
357  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
358  SHOW_SBITS(re, &s->gb, 1);
359  SKIP_BITS(re, &s->gb, 1);
360  } else {
361  /* escape */
362  run = SHOW_UBITS(re, &s->gb, 6) + 1;
363  LAST_SKIP_BITS(re, &s->gb, 6);
364  UPDATE_CACHE(re, &s->gb);
365  level = SHOW_SBITS(re, &s->gb, 12);
366  SKIP_BITS(re, &s->gb, 12);
367 
368  i += run;
369  if (i > MAX_INDEX)
370  break;
371  j = scantable[i];
372  if (level < 0) {
373  level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
374  level = -level;
375  } else {
376  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
377  }
378  }
379 
380  mismatch ^= level;
381  block[j] = level;
382  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
383  break;
384  UPDATE_CACHE(re, &s->gb);
385  }
386 end:
387  LAST_SKIP_BITS(re, &s->gb, 2);
388  CLOSE_READER(re, &s->gb);
389  }
390  block[63] ^= (mismatch & 1);
391 
392  check_scantable_index(s, i);
393 
394  s->block_last_index[n] = i;
395  return 0;
396 }
397 
398 /**
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  * Changing this would eat up any speed benefits it has.
561  * Do not use "fast" flag if you need the code to be robust.
562  */
564  int16_t *block, int n)
565 {
566  int level, dc, diff, i, j, run;
567  int component;
568  RLTable *rl;
569  uint8_t *const scantable = s->intra_scantable.permutated;
570  const uint16_t *quant_matrix;
571  const int qscale = s->qscale;
572 
573  /* DC coefficient */
574  if (n < 4) {
575  quant_matrix = s->intra_matrix;
576  component = 0;
577  } else {
578  quant_matrix = s->chroma_intra_matrix;
579  component = (n & 1) + 1;
580  }
581  diff = decode_dc(&s->gb, component);
582  if (diff >= 0xffff)
583  return AVERROR_INVALIDDATA;
584  dc = s->last_dc[component];
585  dc += diff;
586  s->last_dc[component] = dc;
587  block[0] = dc * (1 << (3 - s->intra_dc_precision));
588  i = 0;
589  if (s->intra_vlc_format)
590  rl = &ff_rl_mpeg2;
591  else
592  rl = &ff_rl_mpeg1;
593 
594  {
595  OPEN_READER(re, &s->gb);
596  /* now quantify & encode AC coefficients */
597  for (;;) {
598  UPDATE_CACHE(re, &s->gb);
599  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
600  TEX_VLC_BITS, 2, 0);
601 
602  if (level >= 64 || i > 63) {
603  break;
604  } else if (level != 0) {
605  i += run;
606  j = scantable[i];
607  level = (level * qscale * quant_matrix[j]) >> 4;
608  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
609  SHOW_SBITS(re, &s->gb, 1);
610  LAST_SKIP_BITS(re, &s->gb, 1);
611  } else {
612  /* escape */
613  run = SHOW_UBITS(re, &s->gb, 6) + 1;
614  LAST_SKIP_BITS(re, &s->gb, 6);
615  UPDATE_CACHE(re, &s->gb);
616  level = SHOW_SBITS(re, &s->gb, 12);
617  SKIP_BITS(re, &s->gb, 12);
618  i += run;
619  j = scantable[i];
620  if (level < 0) {
621  level = (-level * qscale * quant_matrix[j]) >> 4;
622  level = -level;
623  } else {
624  level = (level * qscale * quant_matrix[j]) >> 4;
625  }
626  }
627 
628  block[j] = level;
629  }
630  CLOSE_READER(re, &s->gb);
631  }
632 
633  check_scantable_index(s, i);
634 
635  s->block_last_index[n] = i;
636  return 0;
637 }
638 
639 /******************************************/
640 /* decoding */
641 
642 static inline int get_dmv(MpegEncContext *s)
643 {
644  if (get_bits1(&s->gb))
645  return 1 - (get_bits1(&s->gb) << 1);
646  else
647  return 0;
648 }
649 
650 /* motion type (for MPEG-2) */
651 #define MT_FIELD 1
652 #define MT_FRAME 2
653 #define MT_16X8 2
654 #define MT_DMV 3
655 
656 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
657 {
658  int i, j, k, cbp, val, mb_type, motion_type;
659  const int mb_block_count = 4 + (1 << s->chroma_format);
660  int ret;
661 
662  ff_tlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
663 
664  av_assert2(s->mb_skipped == 0);
665 
666  if (s->mb_skip_run-- != 0) {
667  if (s->pict_type == AV_PICTURE_TYPE_P) {
668  s->mb_skipped = 1;
669  s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
671  } else {
672  int mb_type;
673 
674  if (s->mb_x)
675  mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
676  else
677  // FIXME not sure if this is allowed in MPEG at all
678  mb_type = s->current_picture.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1];
679  if (IS_INTRA(mb_type)) {
680  av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
681  return AVERROR_INVALIDDATA;
682  }
683  s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
684  mb_type | MB_TYPE_SKIP;
685 
686  if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
687  s->mb_skipped = 1;
688  }
689 
690  return 0;
691  }
692 
693  switch (s->pict_type) {
694  default:
695  case AV_PICTURE_TYPE_I:
696  if (get_bits1(&s->gb) == 0) {
697  if (get_bits1(&s->gb) == 0) {
699  "Invalid mb type in I-frame at %d %d\n",
700  s->mb_x, s->mb_y);
701  return AVERROR_INVALIDDATA;
702  }
703  mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
704  } else {
705  mb_type = MB_TYPE_INTRA;
706  }
707  break;
708  case AV_PICTURE_TYPE_P:
709  mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
710  if (mb_type < 0) {
712  "Invalid mb type in P-frame at %d %d\n", s->mb_x, s->mb_y);
713  return AVERROR_INVALIDDATA;
714  }
715  mb_type = ptype2mb_type[mb_type];
716  break;
717  case AV_PICTURE_TYPE_B:
718  mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
719  if (mb_type < 0) {
721  "Invalid mb type in B-frame at %d %d\n", s->mb_x, s->mb_y);
722  return AVERROR_INVALIDDATA;
723  }
724  mb_type = btype2mb_type[mb_type];
725  break;
726  }
727  ff_tlog(s->avctx, "mb_type=%x\n", mb_type);
728 // motion_type = 0; /* avoid warning */
729  if (IS_INTRA(mb_type)) {
730  s->bdsp.clear_blocks(s->block[0]);
731 
732  if (!s->chroma_y_shift)
733  s->bdsp.clear_blocks(s->block[6]);
734 
735  /* compute DCT type */
736  // FIXME: add an interlaced_dct coded var?
737  if (s->picture_structure == PICT_FRAME &&
739  s->interlaced_dct = get_bits1(&s->gb);
740 
741  if (IS_QUANT(mb_type))
742  s->qscale = mpeg_get_qscale(s);
743 
745  /* just parse them */
746  if (s->picture_structure != PICT_FRAME)
747  skip_bits1(&s->gb); /* field select */
748 
749  s->mv[0][0][0] =
750  s->last_mv[0][0][0] =
751  s->last_mv[0][1][0] = mpeg_decode_motion(s, s->mpeg_f_code[0][0],
752  s->last_mv[0][0][0]);
753  s->mv[0][0][1] =
754  s->last_mv[0][0][1] =
755  s->last_mv[0][1][1] = mpeg_decode_motion(s, s->mpeg_f_code[0][1],
756  s->last_mv[0][0][1]);
757 
758  check_marker(s->avctx, &s->gb, "after concealment_motion_vectors");
759  } else {
760  /* reset mv prediction */
761  memset(s->last_mv, 0, sizeof(s->last_mv));
762  }
763  s->mb_intra = 1;
764  // if 1, we memcpy blocks in xvmcvideo
766  ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
767 
768  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
769  if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
770  for (i = 0; i < 6; i++)
772  } else {
773  for (i = 0; i < mb_block_count; i++)
774  if ((ret = mpeg2_decode_block_intra(s, *s->pblocks[i], i)) < 0)
775  return ret;
776  }
777  } else {
778  for (i = 0; i < 6; i++) {
780  s->intra_matrix,
782  s->last_dc, *s->pblocks[i],
783  i, s->qscale);
784  if (ret < 0) {
785  av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n",
786  s->mb_x, s->mb_y);
787  return ret;
788  }
789 
790  s->block_last_index[i] = ret;
791  }
792  }
793  } else {
794  if (mb_type & MB_TYPE_ZERO_MV) {
795  av_assert2(mb_type & MB_TYPE_CBP);
796 
797  s->mv_dir = MV_DIR_FORWARD;
798  if (s->picture_structure == PICT_FRAME) {
799  if (s->picture_structure == PICT_FRAME
800  && !s->frame_pred_frame_dct)
801  s->interlaced_dct = get_bits1(&s->gb);
802  s->mv_type = MV_TYPE_16X16;
803  } else {
804  s->mv_type = MV_TYPE_FIELD;
805  mb_type |= MB_TYPE_INTERLACED;
806  s->field_select[0][0] = s->picture_structure - 1;
807  }
808 
809  if (IS_QUANT(mb_type))
810  s->qscale = mpeg_get_qscale(s);
811 
812  s->last_mv[0][0][0] = 0;
813  s->last_mv[0][0][1] = 0;
814  s->last_mv[0][1][0] = 0;
815  s->last_mv[0][1][1] = 0;
816  s->mv[0][0][0] = 0;
817  s->mv[0][0][1] = 0;
818  } else {
819  av_assert2(mb_type & MB_TYPE_L0L1);
820  // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
821  /* get additional motion vector type */
823  motion_type = MT_FRAME;
824  } else {
825  motion_type = get_bits(&s->gb, 2);
826  if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
827  s->interlaced_dct = get_bits1(&s->gb);
828  }
829 
830  if (IS_QUANT(mb_type))
831  s->qscale = mpeg_get_qscale(s);
832 
833  /* motion vectors */
834  s->mv_dir = (mb_type >> 13) & 3;
835  ff_tlog(s->avctx, "motion_type=%d\n", motion_type);
836  switch (motion_type) {
837  case MT_FRAME: /* or MT_16X8 */
838  if (s->picture_structure == PICT_FRAME) {
839  mb_type |= MB_TYPE_16x16;
840  s->mv_type = MV_TYPE_16X16;
841  for (i = 0; i < 2; i++) {
842  if (USES_LIST(mb_type, i)) {
843  /* MT_FRAME */
844  s->mv[i][0][0] =
845  s->last_mv[i][0][0] =
846  s->last_mv[i][1][0] =
847  mpeg_decode_motion(s, s->mpeg_f_code[i][0],
848  s->last_mv[i][0][0]);
849  s->mv[i][0][1] =
850  s->last_mv[i][0][1] =
851  s->last_mv[i][1][1] =
852  mpeg_decode_motion(s, s->mpeg_f_code[i][1],
853  s->last_mv[i][0][1]);
854  /* full_pel: only for MPEG-1 */
855  if (s->full_pel[i]) {
856  s->mv[i][0][0] *= 2;
857  s->mv[i][0][1] *= 2;
858  }
859  }
860  }
861  } else {
862  mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
863  s->mv_type = MV_TYPE_16X8;
864  for (i = 0; i < 2; i++) {
865  if (USES_LIST(mb_type, i)) {
866  /* MT_16X8 */
867  for (j = 0; j < 2; j++) {
868  s->field_select[i][j] = get_bits1(&s->gb);
869  for (k = 0; k < 2; k++) {
870  val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
871  s->last_mv[i][j][k]);
872  s->last_mv[i][j][k] = val;
873  s->mv[i][j][k] = val;
874  }
875  }
876  }
877  }
878  }
879  break;
880  case MT_FIELD:
881  s->mv_type = MV_TYPE_FIELD;
882  if (s->picture_structure == PICT_FRAME) {
883  mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
884  for (i = 0; i < 2; i++) {
885  if (USES_LIST(mb_type, i)) {
886  for (j = 0; j < 2; j++) {
887  s->field_select[i][j] = get_bits1(&s->gb);
888  val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
889  s->last_mv[i][j][0]);
890  s->last_mv[i][j][0] = val;
891  s->mv[i][j][0] = val;
892  ff_tlog(s->avctx, "fmx=%d\n", val);
893  val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
894  s->last_mv[i][j][1] >> 1);
895  s->last_mv[i][j][1] = 2 * val;
896  s->mv[i][j][1] = val;
897  ff_tlog(s->avctx, "fmy=%d\n", val);
898  }
899  }
900  }
901  } else {
903  mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
904  for (i = 0; i < 2; i++) {
905  if (USES_LIST(mb_type, i)) {
906  s->field_select[i][0] = get_bits1(&s->gb);
907  for (k = 0; k < 2; k++) {
908  val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
909  s->last_mv[i][0][k]);
910  s->last_mv[i][0][k] = val;
911  s->last_mv[i][1][k] = val;
912  s->mv[i][0][k] = val;
913  }
914  }
915  }
916  }
917  break;
918  case MT_DMV:
919  if (s->progressive_sequence){
920  av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
921  return AVERROR_INVALIDDATA;
922  }
923  s->mv_type = MV_TYPE_DMV;
924  for (i = 0; i < 2; i++) {
925  if (USES_LIST(mb_type, i)) {
926  int dmx, dmy, mx, my, m;
927  const int my_shift = s->picture_structure == PICT_FRAME;
928 
929  mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
930  s->last_mv[i][0][0]);
931  s->last_mv[i][0][0] = mx;
932  s->last_mv[i][1][0] = mx;
933  dmx = get_dmv(s);
934  my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
935  s->last_mv[i][0][1] >> my_shift);
936  dmy = get_dmv(s);
937 
938 
939  s->last_mv[i][0][1] = my * (1 << my_shift);
940  s->last_mv[i][1][1] = my * (1 << my_shift);
941 
942  s->mv[i][0][0] = mx;
943  s->mv[i][0][1] = my;
944  s->mv[i][1][0] = mx; // not used
945  s->mv[i][1][1] = my; // not used
946 
947  if (s->picture_structure == PICT_FRAME) {
948  mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
949 
950  // m = 1 + 2 * s->top_field_first;
951  m = s->top_field_first ? 1 : 3;
952 
953  /* top -> top pred */
954  s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
955  s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
956  m = 4 - m;
957  s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
958  s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
959  } else {
960  mb_type |= MB_TYPE_16x16;
961 
962  s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
963  s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
965  s->mv[i][2][1]--;
966  else
967  s->mv[i][2][1]++;
968  }
969  }
970  }
971  break;
972  default:
974  "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
975  return AVERROR_INVALIDDATA;
976  }
977  }
978 
979  s->mb_intra = 0;
980  if (HAS_CBP(mb_type)) {
981  s->bdsp.clear_blocks(s->block[0]);
982 
984  if (mb_block_count > 6) {
985  cbp *= 1 << mb_block_count - 6;
986  cbp |= get_bits(&s->gb, mb_block_count - 6);
987  s->bdsp.clear_blocks(s->block[6]);
988  }
989  if (cbp <= 0) {
991  "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y);
992  return AVERROR_INVALIDDATA;
993  }
994 
995  // if 1, we memcpy blocks in xvmcvideo
997  ff_xvmc_pack_pblocks(s, cbp);
998 
999  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1000  if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1001  for (i = 0; i < 6; i++) {
1002  if (cbp & 32)
1004  else
1005  s->block_last_index[i] = -1;
1006  cbp += cbp;
1007  }
1008  } else {
1009  cbp <<= 12 - mb_block_count;
1010 
1011  for (i = 0; i < mb_block_count; i++) {
1012  if (cbp & (1 << 11)) {
1013  if ((ret = mpeg2_decode_block_non_intra(s, *s->pblocks[i], i)) < 0)
1014  return ret;
1015  } else {
1016  s->block_last_index[i] = -1;
1017  }
1018  cbp += cbp;
1019  }
1020  }
1021  } else {
1022  if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1023  for (i = 0; i < 6; i++) {
1024  if (cbp & 32)
1025  mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1026  else
1027  s->block_last_index[i] = -1;
1028  cbp += cbp;
1029  }
1030  } else {
1031  for (i = 0; i < 6; i++) {
1032  if (cbp & 32) {
1033  if ((ret = mpeg1_decode_block_inter(s, *s->pblocks[i], i)) < 0)
1034  return ret;
1035  } else {
1036  s->block_last_index[i] = -1;
1037  }
1038  cbp += cbp;
1039  }
1040  }
1041  }
1042  } else {
1043  for (i = 0; i < 12; i++)
1044  s->block_last_index[i] = -1;
1045  }
1046  }
1047 
1048  s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1049 
1050  return 0;
1051 }
1052 
1054 {
1055  Mpeg1Context *s = avctx->priv_data;
1057 
1059 
1060  if ( avctx->codec_tag != AV_RL32("VCR2")
1061  && avctx->codec_tag != AV_RL32("BW10"))
1062  avctx->coded_width = avctx->coded_height = 0; // do not trust dimensions from input
1063  ff_mpv_decode_init(s2, avctx);
1064 
1065  s->mpeg_enc_ctx.avctx = avctx;
1066 
1067  /* we need some permutation to store matrices,
1068  * until the decoder sets the real permutation. */
1069  ff_mpv_idct_init(s2);
1072 
1073  s2->chroma_format = 1;
1074  s->mpeg_enc_ctx_allocated = 0;
1076  s->repeat_field = 0;
1077  s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1078  avctx->color_range = AVCOL_RANGE_MPEG;
1079  return 0;
1080 }
1081 
1082 #if HAVE_THREADS
1083 static int mpeg_decode_update_thread_context(AVCodecContext *avctx,
1084  const AVCodecContext *avctx_from)
1085 {
1086  Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1087  MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1088  int err;
1089 
1090  if (avctx == avctx_from ||
1091  !ctx_from->mpeg_enc_ctx_allocated ||
1092  !s1->context_initialized)
1093  return 0;
1094 
1095  err = ff_mpeg_update_thread_context(avctx, avctx_from);
1096  if (err)
1097  return err;
1098 
1099  if (!ctx->mpeg_enc_ctx_allocated)
1100  memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1101 
1102  if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1103  s->picture_number++;
1104 
1105  return 0;
1106 }
1107 #endif
1108 
1109 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1110  const uint8_t *new_perm)
1111 {
1112  uint16_t temp_matrix[64];
1113  int i;
1114 
1115  memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1116 
1117  for (i = 0; i < 64; i++)
1118  matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1119 }
1120 
1122 #if CONFIG_MPEG1_NVDEC_HWACCEL
1124 #endif
1125 #if CONFIG_MPEG1_XVMC_HWACCEL
1127 #endif
1128 #if CONFIG_MPEG1_VDPAU_HWACCEL
1130 #endif
1133 };
1134 
1136 #if CONFIG_MPEG2_NVDEC_HWACCEL
1138 #endif
1139 #if CONFIG_MPEG2_XVMC_HWACCEL
1141 #endif
1142 #if CONFIG_MPEG2_VDPAU_HWACCEL
1144 #endif
1145 #if CONFIG_MPEG2_DXVA2_HWACCEL
1147 #endif
1148 #if CONFIG_MPEG2_D3D11VA_HWACCEL
1151 #endif
1152 #if CONFIG_MPEG2_VAAPI_HWACCEL
1154 #endif
1155 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
1157 #endif
1160 };
1161 
1162 static const enum AVPixelFormat mpeg12_pixfmt_list_422[] = {
1165 };
1166 
1167 static const enum AVPixelFormat mpeg12_pixfmt_list_444[] = {
1170 };
1171 
1173 {
1174  Mpeg1Context *s1 = avctx->priv_data;
1175  MpegEncContext *s = &s1->mpeg_enc_ctx;
1176  const enum AVPixelFormat *pix_fmts;
1177 
1178  if (CONFIG_GRAY && (avctx->flags & AV_CODEC_FLAG_GRAY))
1179  return AV_PIX_FMT_GRAY8;
1180 
1181  if (s->chroma_format < 2)
1182  pix_fmts = avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1185  else if (s->chroma_format == 2)
1186  pix_fmts = mpeg12_pixfmt_list_422;
1187  else
1188  pix_fmts = mpeg12_pixfmt_list_444;
1189 
1190  return ff_thread_get_format(avctx, pix_fmts);
1191 }
1192 
1194 {
1195  // until then pix_fmt may be changed right after codec init
1196  if (avctx->hwaccel)
1197  if (avctx->idct_algo == FF_IDCT_AUTO)
1198  avctx->idct_algo = FF_IDCT_NONE;
1199 
1200  if (avctx->hwaccel && avctx->pix_fmt == AV_PIX_FMT_XVMC) {
1201  Mpeg1Context *s1 = avctx->priv_data;
1202  MpegEncContext *s = &s1->mpeg_enc_ctx;
1203 
1204  s->pack_pblocks = 1;
1205  }
1206 }
1207 
1208 /* Call this function when we know all parameters.
1209  * It may be called in different places for MPEG-1 and MPEG-2. */
1211 {
1212  Mpeg1Context *s1 = avctx->priv_data;
1213  MpegEncContext *s = &s1->mpeg_enc_ctx;
1214  uint8_t old_permutation[64];
1215  int ret;
1216 
1217  if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1218  // MPEG-1 aspect
1219  AVRational aspect_inv = av_d2q(ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1220  avctx->sample_aspect_ratio = (AVRational) { aspect_inv.den, aspect_inv.num };
1221  } else { // MPEG-2
1222  // MPEG-2 aspect
1223  if (s->aspect_ratio_info > 1) {
1224  AVRational dar =
1226  (AVRational) { s1->pan_scan.width,
1227  s1->pan_scan.height }),
1228  (AVRational) { s->width, s->height });
1229 
1230  /* We ignore the spec here and guess a bit as reality does not
1231  * match the spec, see for example res_change_ffmpeg_aspect.ts
1232  * and sequence-display-aspect.mpg.
1233  * issue1613, 621, 562 */
1234  if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1235  (av_cmp_q(dar, (AVRational) { 4, 3 }) &&
1236  av_cmp_q(dar, (AVRational) { 16, 9 }))) {
1239  (AVRational) { s->width, s->height });
1240  } else {
1243  (AVRational) { s1->pan_scan.width, s1->pan_scan.height });
1244 // issue1613 4/3 16/9 -> 16/9
1245 // res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1246 // widescreen-issue562.mpg 4/3 16/9 -> 16/9
1247 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1248  ff_dlog(avctx, "aspect A %d/%d\n",
1251  ff_dlog(avctx, "aspect B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1253  }
1254  } else {
1257  }
1258  } // MPEG-2
1259 
1260  if (av_image_check_sar(s->width, s->height,
1261  avctx->sample_aspect_ratio) < 0) {
1262  av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
1263  avctx->sample_aspect_ratio.num,
1264  avctx->sample_aspect_ratio.den);
1265  avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
1266  }
1267 
1268  if ((s1->mpeg_enc_ctx_allocated == 0) ||
1269  avctx->coded_width != s->width ||
1270  avctx->coded_height != s->height ||
1271  s1->save_width != s->width ||
1272  s1->save_height != s->height ||
1274  (s1->save_progressive_seq != s->progressive_sequence && FFALIGN(s->height, 16) != FFALIGN(s->height, 32)) ||
1275  0) {
1276  if (s1->mpeg_enc_ctx_allocated) {
1277  ParseContext pc = s->parse_context;
1278  s->parse_context.buffer = 0;
1279  ff_mpv_common_end(s);
1280  s->parse_context = pc;
1281  s1->mpeg_enc_ctx_allocated = 0;
1282  }
1283 
1284  ret = ff_set_dimensions(avctx, s->width, s->height);
1285  if (ret < 0)
1286  return ret;
1287 
1288  if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1289  avctx->rc_max_rate = s->bit_rate;
1290  } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1291  (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1292  avctx->bit_rate = s->bit_rate;
1293  }
1295  s1->save_width = s->width;
1296  s1->save_height = s->height;
1298 
1299  /* low_delay may be forced, in this case we will have B-frames
1300  * that behave like P-frames. */
1301  avctx->has_b_frames = !s->low_delay;
1302 
1303  if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1304  // MPEG-1 fps
1306  avctx->ticks_per_frame = 1;
1307 
1309  } else { // MPEG-2
1310  // MPEG-2 fps
1312  &s->avctx->framerate.den,
1315  1 << 30);
1316  avctx->ticks_per_frame = 2;
1317 
1318  switch (s->chroma_format) {
1319  case 1: avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; break;
1320  case 2:
1321  case 3: avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; break;
1322  default: av_assert0(0);
1323  }
1324  } // MPEG-2
1325 
1326  avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1327  setup_hwaccel_for_pixfmt(avctx);
1328 
1329  /* Quantization matrices may need reordering
1330  * if DCT permutation is changed. */
1331  memcpy(old_permutation, s->idsp.idct_permutation, 64 * sizeof(uint8_t));
1332 
1333  ff_mpv_idct_init(s);
1334  if ((ret = ff_mpv_common_init(s)) < 0)
1335  return ret;
1336 
1337  quant_matrix_rebuild(s->intra_matrix, old_permutation, s->idsp.idct_permutation);
1338  quant_matrix_rebuild(s->inter_matrix, old_permutation, s->idsp.idct_permutation);
1341 
1342  s1->mpeg_enc_ctx_allocated = 1;
1343  }
1344  return 0;
1345 }
1346 
1347 static int mpeg1_decode_picture(AVCodecContext *avctx, const uint8_t *buf,
1348  int buf_size)
1349 {
1350  Mpeg1Context *s1 = avctx->priv_data;
1351  MpegEncContext *s = &s1->mpeg_enc_ctx;
1352  int ref, f_code, vbv_delay;
1353 
1354  init_get_bits(&s->gb, buf, buf_size * 8);
1355 
1356  ref = get_bits(&s->gb, 10); /* temporal ref */
1357  s->pict_type = get_bits(&s->gb, 3);
1358  if (s->pict_type == 0 || s->pict_type > 3)
1359  return AVERROR_INVALIDDATA;
1360 
1361  vbv_delay = get_bits(&s->gb, 16);
1362  s->vbv_delay = vbv_delay;
1363  if (s->pict_type == AV_PICTURE_TYPE_P ||
1364  s->pict_type == AV_PICTURE_TYPE_B) {
1365  s->full_pel[0] = get_bits1(&s->gb);
1366  f_code = get_bits(&s->gb, 3);
1367  if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1368  return AVERROR_INVALIDDATA;
1369  f_code += !f_code;
1370  s->mpeg_f_code[0][0] = f_code;
1371  s->mpeg_f_code[0][1] = f_code;
1372  }
1373  if (s->pict_type == AV_PICTURE_TYPE_B) {
1374  s->full_pel[1] = get_bits1(&s->gb);
1375  f_code = get_bits(&s->gb, 3);
1376  if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1377  return AVERROR_INVALIDDATA;
1378  f_code += !f_code;
1379  s->mpeg_f_code[1][0] = f_code;
1380  s->mpeg_f_code[1][1] = f_code;
1381  }
1384 
1385  if (avctx->debug & FF_DEBUG_PICT_INFO)
1386  av_log(avctx, AV_LOG_DEBUG,
1387  "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1388 
1389  s->y_dc_scale = 8;
1390  s->c_dc_scale = 8;
1391  return 0;
1392 }
1393 
1395 {
1396  MpegEncContext *s = &s1->mpeg_enc_ctx;
1397  int horiz_size_ext, vert_size_ext;
1398  int bit_rate_ext;
1399  AVCPBProperties *cpb_props;
1400 
1401  skip_bits(&s->gb, 1); /* profile and level esc*/
1402  s->avctx->profile = get_bits(&s->gb, 3);
1403  s->avctx->level = get_bits(&s->gb, 4);
1404  s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1405  s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1406 
1407  if (!s->chroma_format) {
1408  s->chroma_format = 1;
1409  av_log(s->avctx, AV_LOG_WARNING, "Chroma format invalid\n");
1410  }
1411 
1412  horiz_size_ext = get_bits(&s->gb, 2);
1413  vert_size_ext = get_bits(&s->gb, 2);
1414  s->width |= (horiz_size_ext << 12);
1415  s->height |= (vert_size_ext << 12);
1416  bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1417  s->bit_rate += (bit_rate_ext << 18) * 400LL;
1418  check_marker(s->avctx, &s->gb, "after bit rate extension");
1419  s1->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1420 
1421  s->low_delay = get_bits1(&s->gb);
1423  s->low_delay = 1;
1424 
1425  s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1426  s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1427 
1428  ff_dlog(s->avctx, "sequence extension\n");
1430 
1431  if (cpb_props = ff_add_cpb_side_data(s->avctx)) {
1432  cpb_props->buffer_size = s1->rc_buffer_size;
1433  if (s->bit_rate != 0x3FFFF*400)
1434  cpb_props->max_bitrate = s->bit_rate;
1435  }
1436 
1437  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1439  "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%"PRId64"\n",
1441  s1->rc_buffer_size, s->bit_rate);
1442 }
1443 
1445 {
1446  MpegEncContext *s = &s1->mpeg_enc_ctx;
1447  int color_description, w, h;
1448 
1449  skip_bits(&s->gb, 3); /* video format */
1450  color_description = get_bits1(&s->gb);
1451  if (color_description) {
1452  s->avctx->color_primaries = get_bits(&s->gb, 8);
1453  s->avctx->color_trc = get_bits(&s->gb, 8);
1454  s->avctx->colorspace = get_bits(&s->gb, 8);
1455  }
1456  w = get_bits(&s->gb, 14);
1457  skip_bits(&s->gb, 1); // marker
1458  h = get_bits(&s->gb, 14);
1459  // remaining 3 bits are zero padding
1460 
1461  s1->pan_scan.width = 16 * w;
1462  s1->pan_scan.height = 16 * h;
1463 
1464  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1465  av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1466 }
1467 
1469 {
1470  MpegEncContext *s = &s1->mpeg_enc_ctx;
1471  int i, nofco;
1472 
1473  nofco = 1;
1474  if (s->progressive_sequence) {
1475  if (s->repeat_first_field) {
1476  nofco++;
1477  if (s->top_field_first)
1478  nofco++;
1479  }
1480  } else {
1481  if (s->picture_structure == PICT_FRAME) {
1482  nofco++;
1483  if (s->repeat_first_field)
1484  nofco++;
1485  }
1486  }
1487  for (i = 0; i < nofco; i++) {
1488  s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1489  skip_bits(&s->gb, 1); // marker
1490  s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1491  skip_bits(&s->gb, 1); // marker
1492  }
1493 
1494  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1496  "pde (%"PRId16",%"PRId16") (%"PRId16",%"PRId16") (%"PRId16",%"PRId16")\n",
1497  s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1498  s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1499  s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1500 }
1501 
1502 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64],
1503  uint16_t matrix1[64], int intra)
1504 {
1505  int i;
1506 
1507  for (i = 0; i < 64; i++) {
1508  int j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
1509  int v = get_bits(&s->gb, 8);
1510  if (v == 0) {
1511  av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1512  return AVERROR_INVALIDDATA;
1513  }
1514  if (intra && i == 0 && v != 8) {
1515  av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1516  v = 8; // needed by pink.mpg / issue1046
1517  }
1518  matrix0[j] = v;
1519  if (matrix1)
1520  matrix1[j] = v;
1521  }
1522  return 0;
1523 }
1524 
1526 {
1527  ff_dlog(s->avctx, "matrix extension\n");
1528 
1529  if (get_bits1(&s->gb))
1531  if (get_bits1(&s->gb))
1533  if (get_bits1(&s->gb))
1535  if (get_bits1(&s->gb))
1537 }
1538 
1540 {
1541  MpegEncContext *s = &s1->mpeg_enc_ctx;
1542 
1543  s->full_pel[0] = s->full_pel[1] = 0;
1544  s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1545  s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1546  s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1547  s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1548  if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1550  "Missing picture start code, guessing missing values\n");
1551  if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1552  if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1554  else
1556  } else
1560  }
1561  s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1562  s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1563  s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1564  s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1565 
1566  s->intra_dc_precision = get_bits(&s->gb, 2);
1567  s->picture_structure = get_bits(&s->gb, 2);
1568  s->top_field_first = get_bits1(&s->gb);
1569  s->frame_pred_frame_dct = get_bits1(&s->gb);
1571  s->q_scale_type = get_bits1(&s->gb);
1572  s->intra_vlc_format = get_bits1(&s->gb);
1573  s->alternate_scan = get_bits1(&s->gb);
1574  s->repeat_first_field = get_bits1(&s->gb);
1575  s->chroma_420_type = get_bits1(&s->gb);
1576  s->progressive_frame = get_bits1(&s->gb);
1577 
1578  if (s->alternate_scan) {
1581  } else {
1584  }
1585 
1586  /* composite display not parsed */
1587  ff_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1588  ff_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1589  ff_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1590  ff_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1591  ff_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1592  ff_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1593  ff_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1594  ff_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1595  ff_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1596 }
1597 
1598 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1599 {
1600  AVCodecContext *avctx = s->avctx;
1601  Mpeg1Context *s1 = (Mpeg1Context *) s;
1602  int ret;
1603 
1604  if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)) {
1605  if (s->mb_width * s->mb_height * 11LL / (33 * 2 * 8) > buf_size)
1606  return AVERROR_INVALIDDATA;
1607  }
1608 
1609  /* start frame decoding */
1610  if (s->first_field || s->picture_structure == PICT_FRAME) {
1612 
1613  if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
1614  return ret;
1615 
1617 
1618  /* first check if we must repeat the frame */
1620  if (s->repeat_first_field) {
1621  if (s->progressive_sequence) {
1622  if (s->top_field_first)
1624  else
1626  } else if (s->progressive_frame) {
1628  }
1629  }
1630 
1633  sizeof(s1->pan_scan));
1634  if (!pan_scan)
1635  return AVERROR(ENOMEM);
1636  memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1637 
1638  if (s1->a53_caption) {
1641  s1->a53_caption_size);
1642  if (sd)
1643  memcpy(sd->data, s1->a53_caption, s1->a53_caption_size);
1644  av_freep(&s1->a53_caption);
1645  }
1646 
1647  if (s1->has_stereo3d) {
1649  if (!stereo)
1650  return AVERROR(ENOMEM);
1651 
1652  *stereo = s1->stereo3d;
1653  s1->has_stereo3d = 0;
1654  }
1655 
1656  if (s1->has_afd) {
1657  AVFrameSideData *sd =
1659  AV_FRAME_DATA_AFD, 1);
1660  if (!sd)
1661  return AVERROR(ENOMEM);
1662 
1663  *sd->data = s1->afd;
1664  s1->has_afd = 0;
1665  }
1666 
1668  ff_thread_finish_setup(avctx);
1669  } else { // second field
1670  int i;
1671 
1672  if (!s->current_picture_ptr) {
1673  av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1674  return AVERROR_INVALIDDATA;
1675  }
1676 
1677  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++) {
1688  s->current_picture.f->data[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 = mpeg_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.
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  s->field_select[0][0] = (s->picture_structure - 1) & 1;
1972  s->field_select[1][0] = (s->picture_structure - 1) & 1;
1973  }
1974  }
1975  }
1976  }
1977 eos: // end of slice
1978  if (get_bits_left(&s->gb) < 0) {
1979  av_log(s, AV_LOG_ERROR, "overread %d\n", -get_bits_left(&s->gb));
1980  return AVERROR_INVALIDDATA;
1981  }
1982  *buf += (get_bits_count(&s->gb) - 1) / 8;
1983  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);
1984  return 0;
1985 }
1986 
1988 {
1989  MpegEncContext *s = *(void **) arg;
1990  const uint8_t *buf = s->gb.buffer;
1991  int mb_y = s->start_mb_y;
1992  const int field_pic = s->picture_structure != PICT_FRAME;
1993 
1994  s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1995 
1996  for (;;) {
1997  uint32_t start_code;
1998  int ret;
1999 
2000  ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
2001  emms_c();
2002  ff_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
2003  ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
2004  s->start_mb_y, s->end_mb_y, s->er.error_count);
2005  if (ret < 0) {
2006  if (c->err_recognition & AV_EF_EXPLODE)
2007  return ret;
2008  if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
2010  s->mb_x, s->mb_y,
2012  } else {
2014  s->mb_x - 1, s->mb_y,
2016  }
2017 
2018  if (s->mb_y == s->end_mb_y)
2019  return 0;
2020 
2021  start_code = -1;
2022  buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
2023  if (start_code < SLICE_MIN_START_CODE || start_code > SLICE_MAX_START_CODE)
2024  return AVERROR_INVALIDDATA;
2025  mb_y = start_code - SLICE_MIN_START_CODE;
2026  if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
2027  mb_y += (*buf&0xE0)<<2;
2028  mb_y <<= field_pic;
2030  mb_y++;
2031  if (mb_y >= s->end_mb_y)
2032  return AVERROR_INVALIDDATA;
2033  }
2034 }
2035 
2036 /**
2037  * Handle slice ends.
2038  * @return 1 if it seems to be the last slice
2039  */
2040 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2041 {
2042  Mpeg1Context *s1 = avctx->priv_data;
2043  MpegEncContext *s = &s1->mpeg_enc_ctx;
2044 
2046  return 0;
2047 
2048  if (s->avctx->hwaccel) {
2049  int ret = s->avctx->hwaccel->end_frame(s->avctx);
2050  if (ret < 0) {
2051  av_log(avctx, AV_LOG_ERROR,
2052  "hardware accelerator failed to decode picture\n");
2053  return ret;
2054  }
2055  }
2056 
2057  /* end of slice reached */
2058  if (/* s->mb_y << field_pic == s->mb_height && */ !s->first_field && !s1->first_slice) {
2059  /* end of image */
2060 
2061  ff_er_frame_end(&s->er);
2062 
2063  ff_mpv_frame_end(s);
2064 
2065  if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
2066  int ret = av_frame_ref(pict, s->current_picture_ptr->f);
2067  if (ret < 0)
2068  return ret;
2071  } else {
2072  if (avctx->active_thread_type & FF_THREAD_FRAME)
2073  s->picture_number++;
2074  /* latency of 1 frame for I- and P-frames */
2075  /* XXX: use another variable than picture_number */
2076  if (s->last_picture_ptr) {
2077  int ret = av_frame_ref(pict, s->last_picture_ptr->f);
2078  if (ret < 0)
2079  return ret;
2082  }
2083  }
2084 
2085  return 1;
2086  } else {
2087  return 0;
2088  }
2089 }
2090 
2092  const uint8_t *buf, int buf_size)
2093 {
2094  Mpeg1Context *s1 = avctx->priv_data;
2095  MpegEncContext *s = &s1->mpeg_enc_ctx;
2096  int width, height;
2097  int i, v, j;
2098 
2099  init_get_bits(&s->gb, buf, buf_size * 8);
2100 
2101  width = get_bits(&s->gb, 12);
2102  height = get_bits(&s->gb, 12);
2103  if (width == 0 || height == 0) {
2104  av_log(avctx, AV_LOG_WARNING,
2105  "Invalid horizontal or vertical size value.\n");
2107  return AVERROR_INVALIDDATA;
2108  }
2109  s->aspect_ratio_info = get_bits(&s->gb, 4);
2110  if (s->aspect_ratio_info == 0) {
2111  av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2113  return AVERROR_INVALIDDATA;
2114  }
2115  s->frame_rate_index = get_bits(&s->gb, 4);
2116  if (s->frame_rate_index == 0 || s->frame_rate_index > 13) {
2117  av_log(avctx, AV_LOG_WARNING,
2118  "frame_rate_index %d is invalid\n", s->frame_rate_index);
2119  s->frame_rate_index = 1;
2120  }
2121  s->bit_rate = get_bits(&s->gb, 18) * 400LL;
2122  if (check_marker(s->avctx, &s->gb, "in sequence header") == 0) {
2123  return AVERROR_INVALIDDATA;
2124  }
2125 
2126  s1->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2127  skip_bits(&s->gb, 1);
2128 
2129  /* get matrix */
2130  if (get_bits1(&s->gb)) {
2132  } else {
2133  for (i = 0; i < 64; i++) {
2134  j = s->idsp.idct_permutation[i];
2136  s->intra_matrix[j] = v;
2137  s->chroma_intra_matrix[j] = v;
2138  }
2139  }
2140  if (get_bits1(&s->gb)) {
2142  } else {
2143  for (i = 0; i < 64; i++) {
2144  int j = s->idsp.idct_permutation[i];
2146  s->inter_matrix[j] = v;
2147  s->chroma_inter_matrix[j] = v;
2148  }
2149  }
2150 
2151  if (show_bits(&s->gb, 23) != 0) {
2152  av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2153  return AVERROR_INVALIDDATA;
2154  }
2155 
2156  s->width = width;
2157  s->height = height;
2158 
2159  /* We set MPEG-2 parameters so that it emulates MPEG-1. */
2160  s->progressive_sequence = 1;
2161  s->progressive_frame = 1;
2163  s->first_field = 0;
2164  s->frame_pred_frame_dct = 1;
2165  s->chroma_format = 1;
2166  s->codec_id =
2168  s->out_format = FMT_MPEG1;
2169  s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2171  s->low_delay = 1;
2172 
2173  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2174  av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%"PRId64", aspect_ratio_info: %d \n",
2176 
2177  return 0;
2178 }
2179 
2181 {
2182  Mpeg1Context *s1 = avctx->priv_data;
2183  MpegEncContext *s = &s1->mpeg_enc_ctx;
2184  int i, v, ret;
2185 
2186  /* start new MPEG-1 context decoding */
2187  s->out_format = FMT_MPEG1;
2188  if (s1->mpeg_enc_ctx_allocated) {
2189  ff_mpv_common_end(s);
2190  s1->mpeg_enc_ctx_allocated = 0;
2191  }
2192  s->width = avctx->coded_width;
2193  s->height = avctx->coded_height;
2194  avctx->has_b_frames = 0; // true?
2195  s->low_delay = 1;
2196 
2197  avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2198  setup_hwaccel_for_pixfmt(avctx);
2199 
2200  ff_mpv_idct_init(s);
2201  if ((ret = ff_mpv_common_init(s)) < 0)
2202  return ret;
2203  s1->mpeg_enc_ctx_allocated = 1;
2204 
2205  for (i = 0; i < 64; i++) {
2206  int j = s->idsp.idct_permutation[i];
2208  s->intra_matrix[j] = v;
2209  s->chroma_intra_matrix[j] = v;
2210 
2212  s->inter_matrix[j] = v;
2213  s->chroma_inter_matrix[j] = v;
2214  }
2215 
2216  s->progressive_sequence = 1;
2217  s->progressive_frame = 1;
2219  s->first_field = 0;
2220  s->frame_pred_frame_dct = 1;
2221  s->chroma_format = 1;
2222  if (s->codec_tag == AV_RL32("BW10")) {
2224  } else {
2225  s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2227  }
2228  s1->save_width = s->width;
2229  s1->save_height = s->height;
2231  return 0;
2232 }
2233 
2235  const uint8_t *p, int buf_size)
2236 {
2237  Mpeg1Context *s1 = avctx->priv_data;
2238 
2239  if (buf_size >= 6 &&
2240  p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2241  p[4] == 3 && (p[5] & 0x40)) {
2242  /* extract A53 Part 4 CC data */
2243  int cc_count = p[5] & 0x1f;
2244  if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2245  av_freep(&s1->a53_caption);
2246  s1->a53_caption_size = cc_count * 3;
2248  if (!s1->a53_caption) {
2249  s1->a53_caption_size = 0;
2250  } else {
2251  memcpy(s1->a53_caption, p + 7, s1->a53_caption_size);
2252  }
2254  }
2255  return 1;
2256  } else if (buf_size >= 2 &&
2257  p[0] == 0x03 && (p[1]&0x7f) == 0x01) {
2258  /* extract SCTE-20 CC data */
2259  GetBitContext gb;
2260  int cc_count = 0;
2261  int i;
2262 
2263  init_get_bits(&gb, p + 2, buf_size - 2);
2264  cc_count = get_bits(&gb, 5);
2265  if (cc_count > 0) {
2266  av_freep(&s1->a53_caption);
2267  s1->a53_caption_size = cc_count * 3;
2269  if (!s1->a53_caption) {
2270  s1->a53_caption_size = 0;
2271  } else {
2272  uint8_t field, cc1, cc2;
2273  uint8_t *cap = s1->a53_caption;
2274  for (i = 0; i < cc_count && get_bits_left(&gb) >= 26; i++) {
2275  skip_bits(&gb, 2); // priority
2276  field = get_bits(&gb, 2);
2277  skip_bits(&gb, 5); // line_offset
2278  cc1 = get_bits(&gb, 8);
2279  cc2 = get_bits(&gb, 8);
2280  skip_bits(&gb, 1); // marker
2281 
2282  if (!field) { // forbidden
2283  cap[0] = cap[1] = cap[2] = 0x00;
2284  } else {
2285  field = (field == 2 ? 1 : 0);
2286  if (!s1->mpeg_enc_ctx.top_field_first) field = !field;
2287  cap[0] = 0x04 | field;
2288  cap[1] = ff_reverse[cc1];
2289  cap[2] = ff_reverse[cc2];
2290  }
2291  cap += 3;
2292  }
2293  }
2295  }
2296  return 1;
2297  } else if (buf_size >= 11 &&
2298  p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2299  /* extract DVD CC data
2300  *
2301  * uint32_t user_data_start_code 0x000001B2 (big endian)
2302  * uint16_t user_identifier 0x4343 "CC"
2303  * uint8_t user_data_type_code 0x01
2304  * uint8_t caption_block_size 0xF8
2305  * uint8_t
2306  * bit 7 caption_odd_field_first 1=odd field (CC1/CC2) first 0=even field (CC3/CC4) first
2307  * bit 6 caption_filler 0
2308  * bit 5:1 caption_block_count number of caption blocks (pairs of caption words = frames). Most DVDs use 15 per start of GOP.
2309  * bit 0 caption_extra_field_added 1=one additional caption word
2310  *
2311  * struct caption_field_block {
2312  * uint8_t
2313  * bit 7:1 caption_filler 0x7F (all 1s)
2314  * bit 0 caption_field_odd 1=odd field (this is CC1/CC2) 0=even field (this is CC3/CC4)
2315  * uint8_t caption_first_byte
2316  * uint8_t caption_second_byte
2317  * } caption_block[(caption_block_count * 2) + caption_extra_field_added];
2318  *
2319  * Some DVDs encode caption data for both fields with caption_field_odd=1. The only way to decode the fields
2320  * correctly is to start on the field indicated by caption_odd_field_first and count between odd/even fields.
2321  * Don't assume that the first caption word is the odd field. There do exist MPEG files in the wild that start
2322  * on the even field. There also exist DVDs in the wild that encode an odd field count and the
2323  * caption_extra_field_added/caption_odd_field_first bits change per packet to allow that. */
2324  int cc_count = 0;
2325  int i;
2326  // There is a caption count field in the data, but it is often
2327  // incorrect. So count the number of captions present.
2328  for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2329  cc_count++;
2330  // Transform the DVD format into A53 Part 4 format
2331  if (cc_count > 0) {
2332  av_freep(&s1->a53_caption);
2333  s1->a53_caption_size = cc_count * 6;
2335  if (!s1->a53_caption) {
2336  s1->a53_caption_size = 0;
2337  } else {
2338  uint8_t field1 = !!(p[4] & 0x80);
2339  uint8_t *cap = s1->a53_caption;
2340  p += 5;
2341  for (i = 0; i < cc_count; i++) {
2342  cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2343  cap[1] = p[1];
2344  cap[2] = p[2];
2345  cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2346  cap[4] = p[4];
2347  cap[5] = p[5];
2348  cap += 6;
2349  p += 6;
2350  }
2351  }
2353  }
2354  return 1;
2355  }
2356  return 0;
2357 }
2358 
2360  const uint8_t *p, int buf_size)
2361 {
2362  Mpeg1Context *s = avctx->priv_data;
2363  const uint8_t *buf_end = p + buf_size;
2364  Mpeg1Context *s1 = avctx->priv_data;
2365 
2366 #if 0
2367  int i;
2368  for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2369  av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2370  }
2371  av_log(avctx, AV_LOG_ERROR, "\n");
2372 #endif
2373 
2374  if (buf_size > 29){
2375  int i;
2376  for(i=0; i<20; i++)
2377  if (!memcmp(p+i, "\0TMPGEXS\0", 9)){
2378  s->tmpgexs= 1;
2379  }
2380  }
2381  /* we parse the DTG active format information */
2382  if (buf_end - p >= 5 &&
2383  p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2384  int flags = p[4];
2385  p += 5;
2386  if (flags & 0x80) {
2387  /* skip event id */
2388  p += 2;
2389  }
2390  if (flags & 0x40) {
2391  if (buf_end - p < 1)
2392  return;
2393  s1->has_afd = 1;
2394  s1->afd = p[0] & 0x0f;
2395  }
2396  } else if (buf_end - p >= 6 &&
2397  p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2398  p[4] == 0x03) { // S3D_video_format_length
2399  // the 0x7F mask ignores the reserved_bit value
2400  const uint8_t S3D_video_format_type = p[5] & 0x7F;
2401 
2402  if (S3D_video_format_type == 0x03 ||
2403  S3D_video_format_type == 0x04 ||
2404  S3D_video_format_type == 0x08 ||
2405  S3D_video_format_type == 0x23) {
2406 
2407  s1->has_stereo3d = 1;
2408 
2409  switch (S3D_video_format_type) {
2410  case 0x03:
2412  break;
2413  case 0x04:
2415  break;
2416  case 0x08:
2418  break;
2419  case 0x23:
2421  break;
2422  }
2423  }
2424  } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2425  return;
2426  }
2427 }
2428 
2429 static void mpeg_decode_gop(AVCodecContext *avctx,
2430  const uint8_t *buf, int buf_size)
2431 {
2432  Mpeg1Context *s1 = avctx->priv_data;
2433  MpegEncContext *s = &s1->mpeg_enc_ctx;
2434  int broken_link;
2435  int64_t tc;
2436 
2437  init_get_bits(&s->gb, buf, buf_size * 8);
2438 
2439  tc = s-> timecode_frame_start = get_bits(&s->gb, 25);
2440 
2441 #if FF_API_PRIVATE_OPT
2443  avctx->timecode_frame_start = tc;
2445 #endif
2446 
2447  s->closed_gop = get_bits1(&s->gb);
2448  /* broken_link indicates that after editing the
2449  * reference frames of the first B-Frames after GOP I-Frame
2450  * are missing (open gop) */
2451  broken_link = get_bits1(&s->gb);
2452 
2453  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2454  char tcbuf[AV_TIMECODE_STR_SIZE];
2457  "GOP (%s) closed_gop=%d broken_link=%d\n",
2458  tcbuf, s->closed_gop, broken_link);
2459  }
2460 }
2461 
2462 static int decode_chunks(AVCodecContext *avctx, AVFrame *picture,
2463  int *got_output, const uint8_t *buf, int buf_size)
2464 {
2465  Mpeg1Context *s = avctx->priv_data;
2467  const uint8_t *buf_ptr = buf;
2468  const uint8_t *buf_end = buf + buf_size;
2469  int ret, input_size;
2470  int last_code = 0, skip_frame = 0;
2471  int picture_start_code_seen = 0;
2472 
2473  for (;;) {
2474  /* find next start code */
2475  uint32_t start_code = -1;
2476  buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2477  if (start_code > 0x1ff) {
2478  if (!skip_frame) {
2479  if (HAVE_THREADS &&
2480  (avctx->active_thread_type & FF_THREAD_SLICE) &&
2481  !avctx->hwaccel) {
2482  int i;
2483  av_assert0(avctx->thread_count > 1);
2484 
2485  avctx->execute(avctx, slice_decode_thread,
2486  &s2->thread_context[0], NULL,
2487  s->slice_count, sizeof(void *));
2488  for (i = 0; i < s->slice_count; i++)
2489  s2->er.error_count += s2->thread_context[i]->er.error_count;
2490  }
2491 
2492  ret = slice_end(avctx, picture);
2493  if (ret < 0)
2494  return ret;
2495  else if (ret) {
2496  // FIXME: merge with the stuff in mpeg_decode_slice
2497  if (s2->last_picture_ptr || s2->low_delay || s2->pict_type == AV_PICTURE_TYPE_B)
2498  *got_output = 1;
2499  }
2500  }
2501  s2->pict_type = 0;
2502 
2503  if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2504  return AVERROR_INVALIDDATA;
2505 
2506  return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2507  }
2508 
2509  input_size = buf_end - buf_ptr;
2510 
2511  if (avctx->debug & FF_DEBUG_STARTCODE)
2512  av_log(avctx, AV_LOG_DEBUG, "%3"PRIX32" at %"PTRDIFF_SPECIFIER" left %d\n",
2513  start_code, buf_ptr - buf, input_size);
2514 
2515  /* prepare data for next start code */
2516  switch (start_code) {
2517  case SEQ_START_CODE:
2518  if (last_code == 0) {
2519  mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2520  if (buf != avctx->extradata)
2521  s->sync = 1;
2522  } else {
2523  av_log(avctx, AV_LOG_ERROR,
2524  "ignoring SEQ_START_CODE after %X\n", last_code);
2525  if (avctx->err_recognition & AV_EF_EXPLODE)
2526  return AVERROR_INVALIDDATA;
2527  }
2528  break;
2529 
2530  case PICTURE_START_CODE:
2531  if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2532  /* If it's a frame picture, there can't be more than one picture header.
2533  Yet, it does happen and we need to handle it. */
2534  av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2535  break;
2536  }
2537  picture_start_code_seen = 1;
2538 
2539  if (s2->width <= 0 || s2->height <= 0) {
2540  av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2541  s2->width, s2->height);
2542  return AVERROR_INVALIDDATA;
2543  }
2544 
2545  if (s->tmpgexs){
2546  s2->intra_dc_precision= 3;
2547  s2->intra_matrix[0]= 1;
2548  }
2549  if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2550  !avctx->hwaccel && s->slice_count) {
2551  int i;
2552 
2553  avctx->execute(avctx, slice_decode_thread,
2554  s2->thread_context, NULL,
2555  s->slice_count, sizeof(void *));
2556  for (i = 0; i < s->slice_count; i++)
2557  s2->er.error_count += s2->thread_context[i]->er.error_count;
2558  s->slice_count = 0;
2559  }
2560  if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2561  ret = mpeg_decode_postinit(avctx);
2562  if (ret < 0) {
2563  av_log(avctx, AV_LOG_ERROR,
2564  "mpeg_decode_postinit() failure\n");
2565  return ret;
2566  }
2567 
2568  /* We have a complete image: we try to decompress it. */
2569  if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2570  s2->pict_type = 0;
2571  s->first_slice = 1;
2572  last_code = PICTURE_START_CODE;
2573  } else {
2574  av_log(avctx, AV_LOG_ERROR,
2575  "ignoring pic after %X\n", last_code);
2576  if (avctx->err_recognition & AV_EF_EXPLODE)
2577  return AVERROR_INVALIDDATA;
2578  }
2579  break;
2580  case EXT_START_CODE:
2581  init_get_bits(&s2->gb, buf_ptr, input_size * 8);
2582 
2583  switch (get_bits(&s2->gb, 4)) {
2584  case 0x1:
2585  if (last_code == 0) {
2587  } else {
2588  av_log(avctx, AV_LOG_ERROR,
2589  "ignoring seq ext after %X\n", last_code);
2590  if (avctx->err_recognition & AV_EF_EXPLODE)
2591  return AVERROR_INVALIDDATA;
2592  }
2593  break;
2594  case 0x2:
2596  break;
2597  case 0x3:
2599  break;
2600  case 0x7:
2602  break;
2603  case 0x8:
2604  if (last_code == PICTURE_START_CODE) {
2606  } else {
2607  av_log(avctx, AV_LOG_ERROR,
2608  "ignoring pic cod ext after %X\n", last_code);
2609  if (avctx->err_recognition & AV_EF_EXPLODE)
2610  return AVERROR_INVALIDDATA;
2611  }
2612  break;
2613  }
2614  break;
2615  case USER_START_CODE:
2616  mpeg_decode_user_data(avctx, buf_ptr, input_size);
2617  break;
2618  case GOP_START_CODE:
2619  if (last_code == 0) {
2620  s2->first_field = 0;
2621  mpeg_decode_gop(avctx, buf_ptr, input_size);
2622  s->sync = 1;
2623  } else {
2624  av_log(avctx, AV_LOG_ERROR,
2625  "ignoring GOP_START_CODE after %X\n", last_code);
2626  if (avctx->err_recognition & AV_EF_EXPLODE)
2627  return AVERROR_INVALIDDATA;
2628  }
2629  break;
2630  default:
2631  if (start_code >= SLICE_MIN_START_CODE &&
2632  start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2633  if (s2->progressive_sequence && !s2->progressive_frame) {
2634  s2->progressive_frame = 1;
2635  av_log(s2->avctx, AV_LOG_ERROR,
2636  "interlaced frame in progressive sequence, ignoring\n");
2637  }
2638 
2639  if (s2->picture_structure == 0 ||
2641  av_log(s2->avctx, AV_LOG_ERROR,
2642  "picture_structure %d invalid, ignoring\n",
2643  s2->picture_structure);
2645  }
2646 
2648  av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2649 
2650  if (s2->picture_structure == PICT_FRAME) {
2651  s2->first_field = 0;
2652  s2->v_edge_pos = 16 * s2->mb_height;
2653  } else {
2654  s2->first_field ^= 1;
2655  s2->v_edge_pos = 8 * s2->mb_height;
2656  memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2657  }
2658  }
2659  if (start_code >= SLICE_MIN_START_CODE &&
2660  start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2661  const int field_pic = s2->picture_structure != PICT_FRAME;
2662  int mb_y = start_code - SLICE_MIN_START_CODE;
2663  last_code = SLICE_MIN_START_CODE;
2664  if (s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2665  mb_y += (*buf_ptr&0xE0)<<2;
2666 
2667  mb_y <<= field_pic;
2669  mb_y++;
2670 
2671  if (buf_end - buf_ptr < 2) {
2672  av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2673  return AVERROR_INVALIDDATA;
2674  }
2675 
2676  if (mb_y >= s2->mb_height) {
2677  av_log(s2->avctx, AV_LOG_ERROR,
2678  "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2679  return AVERROR_INVALIDDATA;
2680  }
2681 
2682  if (!s2->last_picture_ptr) {
2683  /* Skip B-frames if we do not have reference frames and
2684  * GOP is not closed. */
2685  if (s2->pict_type == AV_PICTURE_TYPE_B) {
2686  if (!s2->closed_gop) {
2687  skip_frame = 1;
2688  av_log(s2->avctx, AV_LOG_DEBUG,
2689  "Skipping B slice due to open GOP\n");
2690  break;
2691  }
2692  }
2693  }
2695  s->sync = 1;
2696  if (!s2->next_picture_ptr) {
2697  /* Skip P-frames if we do not have a reference frame or
2698  * we have an invalid header. */
2699  if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2700  skip_frame = 1;
2701  av_log(s2->avctx, AV_LOG_DEBUG,
2702  "Skipping P slice due to !sync\n");
2703  break;
2704  }
2705  }
2706  if ((avctx->skip_frame >= AVDISCARD_NONREF &&
2707  s2->pict_type == AV_PICTURE_TYPE_B) ||
2708  (avctx->skip_frame >= AVDISCARD_NONKEY &&
2709  s2->pict_type != AV_PICTURE_TYPE_I) ||
2710  avctx->skip_frame >= AVDISCARD_ALL) {
2711  skip_frame = 1;
2712  break;
2713  }
2714 
2715  if (!s->mpeg_enc_ctx_allocated)
2716  break;
2717 
2718  if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2719  if (mb_y < avctx->skip_top ||
2720  mb_y >= s2->mb_height - avctx->skip_bottom)
2721  break;
2722  }
2723 
2724  if (!s2->pict_type) {
2725  av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2726  if (avctx->err_recognition & AV_EF_EXPLODE)
2727  return AVERROR_INVALIDDATA;
2728  break;
2729  }
2730 
2731  if (s->first_slice) {
2732  skip_frame = 0;
2733  s->first_slice = 0;
2734  if ((ret = mpeg_field_start(s2, buf, buf_size)) < 0)
2735  return ret;
2736  }
2737  if (!s2->current_picture_ptr) {
2738  av_log(avctx, AV_LOG_ERROR,
2739  "current_picture not initialized\n");
2740  return AVERROR_INVALIDDATA;
2741  }
2742 
2743  if (HAVE_THREADS &&
2744  (avctx->active_thread_type & FF_THREAD_SLICE) &&
2745  !avctx->hwaccel) {
2746  int threshold = (s2->mb_height * s->slice_count +
2747  s2->slice_context_count / 2) /
2748  s2->slice_context_count;
2749  av_assert0(avctx->thread_count > 1);
2750  if (threshold <= mb_y) {
2751  MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2752 
2753  thread_context->start_mb_y = mb_y;
2754  thread_context->end_mb_y = s2->mb_height;
2755  if (s->slice_count) {
2756  s2->thread_context[s->slice_count - 1]->end_mb_y = mb_y;
2757  ret = ff_update_duplicate_context(thread_context, s2);
2758  if (ret < 0)
2759  return ret;
2760  }
2761  init_get_bits(&thread_context->gb, buf_ptr, input_size * 8);
2762  s->slice_count++;
2763  }
2764  buf_ptr += 2; // FIXME add minimum number of bytes per slice
2765  } else {
2766  ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2767  emms_c();
2768 
2769  if (ret < 0) {
2770  if (avctx->err_recognition & AV_EF_EXPLODE)
2771  return ret;
2772  if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2773  ff_er_add_slice(&s2->er, s2->resync_mb_x,
2774  s2->resync_mb_y, s2->mb_x, s2->mb_y,
2776  } else {
2777  ff_er_add_slice(&s2->er, s2->resync_mb_x,
2778  s2->resync_mb_y, s2->mb_x - 1, s2->mb_y,
2780  }
2781  }
2782  }
2783  break;
2784  }
2785  }
2786 }
2787 
2788 static int mpeg_decode_frame(AVCodecContext *avctx, void *data,
2789  int *got_output, AVPacket *avpkt)
2790 {
2791  const uint8_t *buf = avpkt->data;
2792  int ret;
2793  int buf_size = avpkt->size;
2794  Mpeg1Context *s = avctx->priv_data;
2795  AVFrame *picture = data;
2797 
2798  if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2799  /* special case for last picture */
2800  if (s2->low_delay == 0 && s2->next_picture_ptr) {
2801  int ret = av_frame_ref(picture, s2->next_picture_ptr->f);
2802  if (ret < 0)
2803  return ret;
2804 
2805  s2->next_picture_ptr = NULL;
2806 
2807  *got_output = 1;
2808  }
2809  return buf_size;
2810  }
2811 
2812  if (s2->avctx->flags & AV_CODEC_FLAG_TRUNCATED) {
2813  int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf,
2814  buf_size, NULL);
2815 
2816  if (ff_combine_frame(&s2->parse_context, next,
2817  (const uint8_t **) &buf, &buf_size) < 0)
2818  return buf_size;
2819  }
2820 
2821  s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2822  if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2823  || s2->codec_tag == AV_RL32("BW10")
2824  ))
2825  vcr2_init_sequence(avctx);
2826 
2827  s->slice_count = 0;
2828 
2829  if (avctx->extradata && !s->extradata_decoded) {
2830  ret = decode_chunks(avctx, picture, got_output,
2831  avctx->extradata, avctx->extradata_size);
2832  if (*got_output) {
2833  av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2834  av_frame_unref(picture);
2835  *got_output = 0;
2836  }
2837  s->extradata_decoded = 1;
2838  if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2839  s2->current_picture_ptr = NULL;
2840  return ret;
2841  }
2842  }
2843 
2844  ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2845  if (ret<0 || *got_output) {
2846  s2->current_picture_ptr = NULL;
2847 
2848  if (s2->timecode_frame_start != -1 && *got_output) {
2849  AVFrameSideData *tcside = av_frame_new_side_data(picture,
2851  sizeof(int64_t));
2852  if (!tcside)
2853  return AVERROR(ENOMEM);
2854  memcpy(tcside->data, &s2->timecode_frame_start, sizeof(int64_t));
2855 
2856  s2->timecode_frame_start = -1;
2857  }
2858  }
2859 
2860  return ret;
2861 }
2862 
2863 static void flush(AVCodecContext *avctx)
2864 {
2865  Mpeg1Context *s = avctx->priv_data;
2866 
2867  s->sync = 0;
2868 
2869  ff_mpeg_flush(avctx);
2870 }
2871 
2873 {
2874  Mpeg1Context *s = avctx->priv_data;
2875 
2876  if (s->mpeg_enc_ctx_allocated)
2878  av_freep(&s->a53_caption);
2879  return 0;
2880 }
2881 
2883  .name = "mpeg1video",
2884  .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2885  .type = AVMEDIA_TYPE_VIDEO,
2886  .id = AV_CODEC_ID_MPEG1VIDEO,
2887  .priv_data_size = sizeof(Mpeg1Context),
2889  .close = mpeg_decode_end,
2894  .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2895  .flush = flush,
2896  .max_lowres = 3,
2897  .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context),
2898  .hw_configs = (const AVCodecHWConfigInternal*[]) {
2899 #if CONFIG_MPEG1_NVDEC_HWACCEL
2900  HWACCEL_NVDEC(mpeg1),
2901 #endif
2902 #if CONFIG_MPEG1_VDPAU_HWACCEL
2903  HWACCEL_VDPAU(mpeg1),
2904 #endif
2905 #if CONFIG_MPEG1_VIDEOTOOLBOX_HWACCEL
2906  HWACCEL_VIDEOTOOLBOX(mpeg1),
2907 #endif
2908 #if CONFIG_MPEG1_XVMC_HWACCEL
2909  HWACCEL_XVMC(mpeg1),
2910 #endif
2911  NULL
2912  },
2913 };
2914 
2916  .name = "mpeg2video",
2917  .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2918  .type = AVMEDIA_TYPE_VIDEO,
2919  .id = AV_CODEC_ID_MPEG2VIDEO,
2920  .priv_data_size = sizeof(Mpeg1Context),
2922  .close = mpeg_decode_end,
2927  .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2928  .flush = flush,
2929  .max_lowres = 3,
2931  .hw_configs = (const AVCodecHWConfigInternal*[]) {
2932 #if CONFIG_MPEG2_DXVA2_HWACCEL
2933  HWACCEL_DXVA2(mpeg2),
2934 #endif
2935 #if CONFIG_MPEG2_D3D11VA_HWACCEL
2936  HWACCEL_D3D11VA(mpeg2),
2937 #endif
2938 #if CONFIG_MPEG2_D3D11VA2_HWACCEL
2939  HWACCEL_D3D11VA2(mpeg2),
2940 #endif
2941 #if CONFIG_MPEG2_NVDEC_HWACCEL
2942  HWACCEL_NVDEC(mpeg2),
2943 #endif
2944 #if CONFIG_MPEG2_VAAPI_HWACCEL
2945  HWACCEL_VAAPI(mpeg2),
2946 #endif
2947 #if CONFIG_MPEG2_VDPAU_HWACCEL
2948  HWACCEL_VDPAU(mpeg2),
2949 #endif
2950 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
2951  HWACCEL_VIDEOTOOLBOX(mpeg2),
2952 #endif
2953 #if CONFIG_MPEG2_XVMC_HWACCEL
2954  HWACCEL_XVMC(mpeg2),
2955 #endif
2956  NULL
2957  },
2958 };
2959 
2960 //legacy decoder
2962  .name = "mpegvideo",
2963  .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2964  .type = AVMEDIA_TYPE_VIDEO,
2965  .id = AV_CODEC_ID_MPEG2VIDEO,
2966  .priv_data_size = sizeof(Mpeg1Context),
2968  .close = mpeg_decode_end,
2971  .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2972  .flush = flush,
2973  .max_lowres = 3,
2974 };
static const uint32_t btype2mb_type[11]
Definition: mpeg12dec.c:87
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:602
#define AV_EF_AGGRESSIVE
consider things that a sane encoder should not do as an error
Definition: avcodec.h:1671
#define ff_tlog(ctx,...)
Definition: internal.h:86
IDCTDSPContext idsp
Definition: mpegvideo.h:230
#define NULL
Definition: coverity.c:32
const struct AVCodec * codec
Definition: avcodec.h:535
AVRational framerate
Definition: avcodec.h:2069
discard all frames except keyframes
Definition: avcodec.h:235
int8_t * ref_index[2]
Definition: mpegpicture.h:62
void ff_init_block_index(MpegEncContext *s)
Definition: mpegvideo.c:2272
int64_t timecode_frame_start
GOP timecode frame start number, in non drop frame format.
Definition: mpegvideo.h:463
int aspect_ratio_info
Definition: mpegvideo.h:402
int picture_number
Definition: mpegvideo.h:127
#define MB_TYPE_L1
Definition: mpegutils.h:68
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
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:556
#define MAX_INDEX
Definition: mpeg12dec.c:128
This structure describes decoded (raw) audio or video data.
Definition: frame.h:300
if(ret< 0)
Definition: vf_mcdeint.c:279
int rc_buffer_size
Definition: mpeg12dec.c:67
static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm, const uint8_t *new_perm)
Definition: mpeg12dec.c:1109
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:153
#define MV_TYPE_FIELD
2 vectors, one per field
Definition: mpegvideo.h:269
int last_mv[2][2][2]
last MV, used for MV prediction in MPEG-1 & B-frame MPEG-4
Definition: mpegvideo.h:278
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:714
float re
Definition: fft.c:82
static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
Definition: mpeg12dec.c:1444
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
misc image utilities
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
#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:576
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:104
uint8_t afd
Definition: mpeg12dec.c:62
hardware decoding through Videotoolbox
Definition: pixfmt.h:282
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:154
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
uint8_t * a53_caption
Definition: mpeg12dec.c:60
uint16_t chroma_intra_matrix[64]
Definition: mpegvideo.h:301
int max_bitrate
Maximum bitrate of the stream, in bits per second.
Definition: avcodec.h:454
const uint8_t ff_reverse[256]
Definition: reverse.c:23
int height
Definition: avcodec.h:433
int v_edge_pos
horizontal / vertical position of the right/bottom edge (pixel replication)
Definition: mpegvideo.h:132
uint16_t chroma_inter_matrix[64]
Definition: mpegvideo.h:303
void ff_er_frame_end(ERContext *s)
static int mpeg2_fast_decode_block_non_intra(MpegEncContext *s, int16_t *block, int n)
Changing this would eat up any speed benefits it has.
Definition: mpeg12dec.c:402
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: avcodec.h:1161
static int check_marker(void *logctx, GetBitContext *s, const char *msg)
Definition: get_bits.h:612
int num
Numerator.
Definition: rational.h:59
int repeat_pict
When decoding, this signals how much the picture must be delayed.
Definition: frame.h:442
Views are next to each other, but when upscaling apply a checkerboard pattern.
Definition: stereo3d.h:117
#define HWACCEL_NVDEC(codec)
Definition: hwconfig.h:71
int size
Definition: packet.h:356
enum AVCodecID codec_id
Definition: mpegvideo.h:112
#define AV_EF_COMPLIANT
consider all spec non compliances as errors
Definition: avcodec.h:1670
static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
Definition: mpeg12dec.c:1539
const uint8_t * buffer
Definition: get_bits.h:62
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:905
#define MB_TYPE_INTRA
Definition: mpegutils.h:73
AVCodec ff_mpeg1video_decoder
Definition: mpeg12dec.c:2882
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:736
#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:1053
#define AV_EF_BITSTREAM
detect bitstream specification deviations
Definition: avcodec.h:1664
mpegvideo header.
#define HAS_CBP(a)
Definition: mpegutils.h:101
discard all
Definition: avcodec.h:236
uint8_t permutated[64]
Definition: idctdsp.h:33
Views are next to each other.
Definition: stereo3d.h:67
uint8_t run
Definition: svq3.c:208
#define AV_CODEC_FLAG2_CHUNKS
Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries...
Definition: avcodec.h:367
#define ER_MV_ERROR
static void mpeg_decode_gop(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
Definition: mpeg12dec.c:2429
#define SLICE_MIN_START_CODE
Definition: mpegvideo.h:71
const struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:1690
int profile
profile
Definition: avcodec.h:1859
AVCodec.
Definition: codec.h:190
static int get_dmv(MpegEncContext *s)
Definition: mpeg12dec.c:642
int qscale
QP.
Definition: mpegvideo.h:204
RLTable.
Definition: rl.h:39
static int get_sbits(GetBitContext *s, int n)
Definition: get_bits.h:359
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
#define CONFIG_MPEG1_XVMC_HWACCEL
Definition: config.h:1513
int chroma_x_shift
Definition: mpegvideo.h:486
int encoding
true if we are encoding (vs decoding)
Definition: mpegvideo.h:114
int field_select[2][2]
Definition: mpegvideo.h:277
Macro definitions for various function/variable attributes.
enum AVDiscard skip_frame
Skip decoding for selected frames.
Definition: avcodec.h:2004
static int16_t block[64]
Definition: dct.c:115
#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: codec.h:75
#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:2265
#define MBINCR_VLC_BITS
Definition: mpeg12vlc.h:37
static const uint32_t ptype2mb_type[7]
Definition: mpeg12dec.c:77
#define SLICE_MAX_START_CODE
Definition: avs2_parser.c:24
uint8_t
#define av_cold
Definition: attributes.h:88
#define av_malloc(s)
#define HWACCEL_VDPAU(codec)
Definition: hwconfig.h:75
#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:176
enum OutputFormat out_format
output format
Definition: mpegvideo.h:104
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:1612
#define AV_RB32
Definition: intreadwrite.h:130
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:325
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:444
#define emms_c()
Definition: internal.h:55
static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra)
Definition: mpeg12dec.c:1502
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:627
int full_pel[2]
Definition: mpegvideo.h:490
int interlaced_dct
Definition: mpegvideo.h:491
#define MB_TYPE_16x16
Definition: mpegutils.h:54
static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
Definition: mpeg12dec.c:1172
static int mpeg1_fast_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
Changing this would eat up any speed benefits it has.
Definition: mpeg12dec.c:227
Picture current_picture
copy of the current picture structure.
Definition: mpegvideo.h:180
int first_slice
Definition: mpeg12dec.c:71
The data is the AVPanScan struct defined in libavcodec.
Definition: frame.h:52
int intra_dc_precision
Definition: mpegvideo.h:464
int repeat_first_field
Definition: mpegvideo.h:480
void ff_xvmc_init_block(MpegEncContext *s)
Initialize the block field of the MpegEncContext pointer passed as parameter after making sure that t...
const char data[16]
Definition: mxf.c:91
Structure to hold side data for an AVFrame.
Definition: frame.h:206
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: packet.h:355
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:219
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:329
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:129
int lowres
low resolution decoding, 1-> 1/2 size, 2->1/4 size
Definition: avcodec.h:1765
Video is not stereoscopic (and metadata has to be there).
Definition: stereo3d.h:55
int buffer_size
The size of the buffer to which the ratecontrol is applied, in bits.
Definition: avcodec.h:481
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:120
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:308
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:1168
#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:1730
#define HWACCEL_D3D11VA(codec)
Definition: hwconfig.h:79
#define MB_TYPE_QUANT
Definition: mpegutils.h:70
static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
Definition: mpeg12dec.c:1193
Libavcodec version macros.
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:849
enum AVCodecID id
Definition: codec.h:204
int slice_context_count
number of used thread_contexts
Definition: mpegvideo.h:156
int extradata_decoded
Definition: mpeg12dec.c:72
#define UPDATE_CACHE(name, gb)
Definition: get_bits.h:178
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
#define FF_IDCT_NONE
Definition: avcodec.h:1742
#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:816
int last_dc[3]
last DC values for MPEG-1
Definition: mpegvideo.h:185
#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:651
#define PTRDIFF_SPECIFIER
Definition: internal.h:261
int mb_skipped
MUST BE SET only during DECODING.
Definition: mpegvideo.h:195
int chroma_y_shift
Definition: mpegvideo.h:487
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:234
#define AVERROR(e)
Definition: error.h:43
static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
Definition: mpeg12dec.c:1394
void(* clear_blocks)(int16_t *blocks)
Definition: blockdsp.h:37
#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:566
static int mpeg1_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
Definition: mpeg12dec.c:138
int active_thread_type
Which multithreading methods are in use by the codec.
Definition: avcodec.h:1804
const uint8_t * code
Definition: spdifenc.c:411
AVCodec ff_mpegvideo_decoder
Definition: mpeg12dec.c:2961
#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
const char * arg
Definition: jacosubdec.c:66
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:606
#define wrap(func)
Definition: neontest.h:65
#define SEQ_END_CODE
Definition: mpegvideo.h:67
#define PICT_TOP_FIELD
Definition: mpegutils.h:37
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:239
const char * name
Name of the codec implementation.
Definition: codec.h:197
static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
Definition: mpeg12dec.c:102
int width
width and height in 1/16 pel
Definition: avcodec.h:432
int low_delay
no reordering needed / has no B-frames
Definition: mpegvideo.h:406
static void mpeg_decode_user_data(AVCodecContext *avctx, const uint8_t *p, int buf_size)
Definition: mpeg12dec.c:2359
GetBitContext gb
Definition: mpegvideo.h:448
The GOP timecode in 25 bit timecode format.
Definition: frame.h:124
#define CLOSE_READER(name, gb)
Definition: get_bits.h:149
void ff_mpv_common_end(MpegEncContext *s)
Definition: mpegvideo.c:1131
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:56
attribute_deprecated int64_t timecode_frame_start
Definition: avcodec.h:1488
#define DECODE_SLICE_ERROR
Definition: mpeg12dec.c:1701
#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:70
void ff_mpeg_flush(AVCodecContext *avctx)
Definition: mpegvideo.c:2305
XVideo Motion Acceleration via common packet passing.
Definition: pixfmt.h:273
#define SKIP_BITS(name, gb, num)
Definition: get_bits.h:193
#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:356
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:1598
int intra_vlc_format
Definition: mpegvideo.h:470
const AVProfile ff_mpeg2_video_profiles[]
Definition: profiles.c:94
#define AV_CODEC_CAP_DRAW_HORIZ_BAND
Decoder can use draw_horiz_band callback.
Definition: codec.h:44
static int mpeg2_decode_block_non_intra(MpegEncContext *s, int16_t *block, int n)
Definition: mpeg12dec.c:312
int ff_mpv_export_qp_table(MpegEncContext *s, AVFrame *f, Picture *p, int qp_type)
Definition: mpegvideo.c:1444
int progressive_frame
Definition: mpegvideo.h:489
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:383
#define MB_PAT_VLC_BITS
Definition: mpeg12vlc.h:38
int top_field_first
Definition: mpegvideo.h:466
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:1655
#define FF_THREAD_FRAME
Decode more than one frame at once.
Definition: avcodec.h:1796
#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:2180
#define width
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:196
int idct_algo
IDCT algorithm, see FF_IDCT_* below.
Definition: avcodec.h:1729
uint8_t w
Definition: llviddspenc.c:38
int16_t(*[2] motion_val)[2]
Definition: mpegpicture.h:53
Picture * current_picture_ptr
pointer to the current picture
Definition: mpegvideo.h:184
void ff_mpeg_er_frame_start(MpegEncContext *s)
Definition: mpeg_er.c:46
#define GET_RL_VLC(level, run, name, gb, table, bits, max_depth, need_update)
Definition: get_bits.h:738
#define ER_DC_END
static int mpeg_decode_a53_cc(AVCodecContext *avctx, const uint8_t *p, int buf_size)
Definition: mpeg12dec.c:2234
#define HWACCEL_XVMC(codec)
Definition: hwconfig.h:81
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:558
int alternate_scan
Definition: mpegvideo.h:471
int save_height
Definition: mpeg12dec.c:66
#define MB_BTYPE_VLC_BITS
Definition: mpeg12vlc.h:40
#define GOP_START_CODE
Definition: mpegvideo.h:69
int32_t
AVFormatContext * ctx
Definition: movenc.c:48
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:1140
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:446
int a53_caption_size
Definition: mpeg12dec.c:61
#define s(width, name)
Definition: cbs_vp9.c:257
#define FF_THREAD_SLICE
Decode more than one part of a single frame at once.
Definition: avcodec.h:1797
int level
level
Definition: avcodec.h:1982
#define LAST_SKIP_BITS(name, gb, num)
Definition: get_bits.h:199
static av_cold int mpeg_decode_end(AVCodecContext *avctx)
Definition: mpeg12dec.c:2872
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:797
static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
Definition: mpeg12dec.c:1525
#define AV_RL32
Definition: intreadwrite.h:146
int16_t(*[12] pblocks)[64]
Definition: mpegvideo.h:506
#define CONFIG_GRAY
Definition: config.h:549
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:86
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:1666
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:658
int mpeg_f_code[2][2]
Definition: mpegvideo.h:457
#define EXT_START_CODE
Definition: cavs.h:33
int mpeg_enc_ctx_allocated
Definition: mpeg12dec.c:55
#define check_scantable_index(ctx, x)
Definition: mpeg12dec.c:129
#define MB_TYPE_INTERLACED
Definition: mpegutils.h:58
HW acceleration through CUDA.
Definition: pixfmt.h:235
int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
Definition: mpegvideo.c:491
preferred ID for MPEG-1/2 video decoding
Definition: codec_id.h:51
RL_VLC_ELEM * rl_vlc[32]
decoding only
Definition: rl.h:48
#define SHOW_UBITS(name, gb, num)
Definition: get_bits.h:211
#define HWACCEL_DXVA2(codec)
Definition: hwconfig.h:67
void ff_mpv_decode_defaults(MpegEncContext *s)
Set the given MpegEncContext to defaults for decoding.
Definition: mpegvideo.c:667
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:1785
static int mpeg1_decode_sequence(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
Definition: mpeg12dec.c:2091
static const float pred[4]
Definition: siprdata.h:259
AVRational save_aspect
Definition: mpeg12dec.c:65
int first_field
is 1 for the first field of a field picture 0 otherwise
Definition: mpegvideo.h:492
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: codec.h:110
int save_width
Definition: mpeg12dec.c:66
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:266
#define MV_VLC_BITS
Definition: ituh263dec.c:54
int frame_pred_frame_dct
Definition: mpegvideo.h:465
This structure describes the bitrate properties of an encoded bitstream.
Definition: avcodec.h:448
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:180
uint16_t inter_matrix[64]
Definition: mpegvideo.h:302
uint8_t * buffer
Definition: parser.h:29
static enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[]
Definition: mpeg12dec.c:1135
int concealment_motion_vectors
Definition: mpegvideo.h:467
struct MpegEncContext * thread_context[MAX_THREADS]
Definition: mpegvideo.h:155
Libavcodec external API header.
Views are on top of each other.
Definition: stereo3d.h:79
int(* end_frame)(AVCodecContext *avctx)
Called at the end of each frame or field picture.
Definition: avcodec.h:2511
AVRational frame_rate_ext
Definition: mpeg12dec.c:68
enum AVCodecID codec_id
Definition: avcodec.h:536
BlockDSPContext bdsp
Definition: mpegvideo.h:226
static int mpeg2_fast_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
Changing this would eat up any speed benefits it has.
Definition: mpeg12dec.c:563
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:331
#define AV_CODEC_FLAG2_FAST
Allow non spec compliant speedup tricks.
Definition: avcodec.h:348
int debug
debug
Definition: avcodec.h:1611
#define MB_PTYPE_VLC_BITS
Definition: mpeg12vlc.h:39
main external API structure.
Definition: avcodec.h:526
ScanTable intra_scantable
Definition: mpegvideo.h:91
#define USER_START_CODE
Definition: cavs.h:34
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:100
#define IS_QUANT(a)
Definition: mpegutils.h:95
MPEG-1/2 tables.
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> (&#39;D&#39;<<24) + (&#39;C&#39;<<16) + (&#39;B&#39;<<8) + &#39;A&#39;).
Definition: avcodec.h:551
#define OPEN_READER(name, gb)
Definition: get_bits.h:138
uint8_t * data
Definition: frame.h:208
#define MV_TYPE_16X8
2 vectors, one per 16x8 block
Definition: mpegvideo.h:268
int chroma_420_type
Definition: mpegvideo.h:481
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:1437
int extradata_size
Definition: avcodec.h:628
int progressive_sequence
Definition: mpegvideo.h:456
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:498
static void skip_bits1(GetBitContext *s)
Definition: get_bits.h:538
int coded_height
Definition: avcodec.h:714
#define FF_CODEC_PROPERTY_CLOSED_CAPTIONS
Definition: avcodec.h:2193
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:467
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:727
int closed_gop
MPEG1/2 GOP is closed.
Definition: mpegvideo.h:211
int has_stereo3d
Definition: mpeg12dec.c:59
VLC ff_mb_ptype_vlc
Definition: mpeg12.c:133
unsigned int avpriv_toupper4(unsigned int x)
Definition: utils.c:1832
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:1154
Rational number (pair of numerator and denominator).
Definition: rational.h:58
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:1147
struct AVFrame * f
Definition: mpegpicture.h:46
HW acceleration through VDPAU, Picture.data[3] contains a VdpVideoSurface.
Definition: pixfmt.h:197
static enum AVPixelFormat mpeg12_pixfmt_list_422[]
Definition: mpeg12dec.c:1162
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:659
#define HWACCEL_D3D11VA2(codec)
Definition: hwconfig.h:69
#define GET_CACHE(name, gb)
Definition: get_bits.h:215
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:66
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:98
#define MT_DMV
Definition: mpeg12dec.c:654
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:1205
#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:137
static int mpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_output, AVPacket *avpkt)
Definition: mpeg12dec.c:2788
#define MV_DIR_FORWARD
Definition: mpegvideo.h:262
static int decode_chunks(AVCodecContext *avctx, AVFrame *picture, int *got_output, const uint8_t *buf, int buf_size)
Definition: mpeg12dec.c:2462
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:212
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
av_cold void ff_mpeg12_common_init(MpegEncContext *s)
Definition: mpeg12.c:107
#define AV_CODEC_CAP_TRUNCATED
Definition: codec.h:51
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;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);return NULL;} return ac;} 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;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->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);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> dc
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:554
int skip_bottom
Number of macroblock rows at the bottom which are skipped.
Definition: avcodec.h:1066
#define flags(name, subs,...)
Definition: cbs_av1.c:564
int(* decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
Callback for each slice.
Definition: avcodec.h:2500
Pan Scan area.
Definition: avcodec.h:419
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:314
uint8_t level
Definition: svq3.c:209
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:276
#define FF_QSCALE_TYPE_MPEG2
Definition: internal.h:93
int b8_stride
2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
Definition: mpegvideo.h:131
Hardware surfaces for Direct3D11.
Definition: pixfmt.h:313
the normal 219*2^(n-8) "MPEG" YUV ranges
Definition: pixfmt.h:534
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:2472
MpegEncContext.
Definition: mpegvideo.h:81
Picture * next_picture_ptr
pointer to the next picture (for bidir pred)
Definition: mpegvideo.h:183
struct AVCodecContext * avctx
Definition: mpegvideo.h:98
#define SHOW_SBITS(name, gb, num)
Definition: get_bits.h:212
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:232
const AVRational ff_mpeg2_aspect[16]
Definition: mpeg12data.c:395
static enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[]
Definition: mpeg12dec.c:1121
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
Y , 8bpp.
Definition: pixfmt.h:74
#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:130
void ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx)
Definition: mpegvideo.c:672
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:2915
#define TEX_VLC_BITS
Definition: dv.h:99
static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
Definition: mpeg12dec.c:656
uint8_t * dest[3]
Definition: mpegvideo.h:295
static double c[64]
const uint8_t * buffer_end
Definition: get_bits.h:62
static void flush(AVCodecContext *avctx)
Definition: mpeg12dec.c:2863
VLC ff_mbincr_vlc
Definition: mpeg12.c:132
Picture * last_picture_ptr
pointer to the previous picture.
Definition: mpegvideo.h:182
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:1347
unsigned properties
Properties of the stream that gets decoded.
Definition: avcodec.h:2191
int den
Denominator.
Definition: rational.h:60
const uint8_t ff_alternate_vertical_scan[64]
Definition: mpegvideodata.c:95
int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src)
Definition: mpegvideo.c:466
AVCPBProperties * ff_add_cpb_side_data(AVCodecContext *avctx)
Add a CPB properties side data to an encoding context.
Definition: utils.c:1992
AVStereo3D stereo3d
Definition: mpeg12dec.c:58
static int lowres
Definition: ffplay.c:336
#define IS_INTRA(x, y)
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2040
int16_t position[3][2]
position of the top left corner in 1/16 pel for up to 3 fields/frames
Definition: avcodec.h:440
void * priv_data
Definition: avcodec.h:553
#define PICT_FRAME
Definition: mpegutils.h:39
int frame_rate_index
Definition: mpegvideo.h:217
av_cold int ff_mpv_common_init(MpegEncContext *s)
init common structure for both encoder and decoder.
Definition: mpegvideo.c:890
static int mpeg_decode_postinit(AVCodecContext *avctx)
Definition: mpeg12dec.c:1210
static av_always_inline int diff(const uint32_t a, const uint32_t b)
int picture_structure
Definition: mpegvideo.h:461
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:1625
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:85
void ff_mpv_frame_end(MpegEncContext *s)
Definition: mpegvideo.c:1429
#define MT_FRAME
Definition: mpeg12dec.c:652
#define MV_TYPE_DMV
2 vectors, special mpeg2 Dual Prime Vectors
Definition: mpegvideo.h:270
#define HWACCEL_VAAPI(codec)
Definition: hwconfig.h:73
void ff_mpv_reconstruct_mb(MpegEncContext *s, int16_t block[12][64])
Definition: mpegvideo.c:2253
#define SEQ_START_CODE
Definition: mpegvideo.h:68
int resync_mb_y
y position of last resync marker
Definition: mpegvideo.h:357
int16_t(* block)[64]
points to one of the following blocks
Definition: mpegvideo.h:508
ParseContext parse_context
Definition: mpegvideo.h:362
VLC_TYPE(* table)[2]
code, bits
Definition: vlc.h:28
int64_t bit_rate
wanted bit rate
Definition: mpegvideo.h:103
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:378
static const uint8_t * align_get_bits(GetBitContext *s)
Definition: get_bits.h:693
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:613
#define HAVE_THREADS
Definition: config.h:273
MpegEncContext mpeg_enc_ctx
Definition: mpeg12dec.c:54
int slice_count
Definition: mpeg12dec.c:64
atomic_int error_count
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
#define MB_TYPE_ZERO_MV
Definition: mpeg12dec.c:75
#define AV_CODEC_FLAG_TRUNCATED
Input bitstream might be truncated at a random location instead of only at frame boundaries.
Definition: avcodec.h:317
#define AV_CODEC_FLAG2_SHOW_ALL
Show all frames before the first keyframe.
Definition: avcodec.h:376
uint16_t intra_matrix[64]
matrix transmitted in the bitstream
Definition: mpegvideo.h:300
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:90
#define PICTURE_START_CODE
Definition: mpegvideo.h:70
static int skip_1stop_8data_bits(GetBitContext *gb)
Definition: get_bits.h:854
static const uint8_t start_code[]
HW decoding through Direct3D11 via old API, Picture.data[3] contains a ID3D11VideoDecoderOutputView p...
Definition: pixfmt.h:229
MPEG-1 4:2:0, JPEG 4:2:0, H.263 4:2:0.
Definition: pixfmt.h:557
#define ER_AC_END
static int mpeg_get_qscale(MpegEncContext *s)
Definition: mpegvideo.h:764
static int slice_decode_thread(AVCodecContext *c, void *arg)
Definition: mpeg12dec.c:1987
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:1825
static enum AVPixelFormat mpeg12_pixfmt_list_444[]
Definition: mpeg12dec.c:1167
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
static double val(void *priv, double ch)
Definition: aeval.c:76
This structure stores compressed data.
Definition: packet.h:332
void ff_mpv_report_decode_progress(MpegEncContext *s)
Definition: mpegvideo.c:2350
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:50
#define CONFIG_MPEG2_XVMC_HWACCEL
Definition: config.h:1521
#define MB_TYPE_L0
Definition: mpegutils.h:67
static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
Definition: mpeg12dec.c:1468
Predicted.
Definition: avutil.h:275
#define AV_TIMECODE_STR_SIZE
Definition: timecode.h:33
int64_t rc_max_rate
maximum bitrate
Definition: avcodec.h:1404
const AVRational ff_mpeg12_frame_rate_tab[]
AVPanScan pan_scan
Definition: mpeg12dec.c:57
VLC ff_mb_btype_vlc
Definition: mpeg12.c:134