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mpeg12dec.c
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1 /*
2  * MPEG-1/2 decoder
3  * Copyright (c) 2000, 2001 Fabrice Bellard
4  * Copyright (c) 2002-2013 Michael Niedermayer <michaelni@gmx.at>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * MPEG-1/2 decoder
26  */
27 
28 #define UNCHECKED_BITSTREAM_READER 1
29 #include <inttypes.h>
30 
31 #include "libavutil/attributes.h"
32 #include "libavutil/imgutils.h"
33 #include "libavutil/internal.h"
34 #include "libavutil/stereo3d.h"
35 
36 #include "avcodec.h"
37 #include "bytestream.h"
38 #include "error_resilience.h"
39 #include "hwaccel.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;
67  AVRational frame_rate_ext; /* MPEG-2 specific framerate modificator */
68  int sync; /* Did we reach a sync point like a GOP/SEQ/KEYFrame? */
69  int tmpgexs;
72 } Mpeg1Context;
73 
74 #define MB_TYPE_ZERO_MV 0x20000000
75 
76 static const uint32_t ptype2mb_type[7] = {
79  MB_TYPE_L0,
80  MB_TYPE_L0 | MB_TYPE_CBP,
83  MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
84 };
85 
86 static const uint32_t btype2mb_type[11] = {
88  MB_TYPE_L1,
89  MB_TYPE_L1 | MB_TYPE_CBP,
90  MB_TYPE_L0,
91  MB_TYPE_L0 | MB_TYPE_CBP,
93  MB_TYPE_L0L1 | MB_TYPE_CBP,
95  MB_TYPE_QUANT | MB_TYPE_L1 | MB_TYPE_CBP,
96  MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
97  MB_TYPE_QUANT | MB_TYPE_L0L1 | MB_TYPE_CBP,
98 };
99 
100 /* as H.263, but only 17 codes */
101 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
102 {
103  int code, sign, val, shift;
104 
105  code = get_vlc2(&s->gb, ff_mv_vlc.table, MV_VLC_BITS, 2);
106  if (code == 0)
107  return pred;
108  if (code < 0)
109  return 0xffff;
110 
111  sign = get_bits1(&s->gb);
112  shift = fcode - 1;
113  val = code;
114  if (shift) {
115  val = (val - 1) << shift;
116  val |= get_bits(&s->gb, shift);
117  val++;
118  }
119  if (sign)
120  val = -val;
121  val += pred;
122 
123  /* modulo decoding */
124  return sign_extend(val, 5 + shift);
125 }
126 
127 #define MAX_INDEX (64 - 1)
128 #define check_scantable_index(ctx, x) \
129  do { \
130  if ((x) > MAX_INDEX) { \
131  av_log(ctx->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", \
132  ctx->mb_x, ctx->mb_y); \
133  return AVERROR_INVALIDDATA; \
134  } \
135  } while (0)
136 
138  int16_t *block, int n)
139 {
140  int level, i, j, run;
141  RLTable *rl = &ff_rl_mpeg1;
142  uint8_t *const scantable = s->intra_scantable.permutated;
143  const uint16_t *quant_matrix = s->inter_matrix;
144  const int qscale = s->qscale;
145 
146  {
147  OPEN_READER(re, &s->gb);
148  i = -1;
149  // special case for first coefficient, no need to add second VLC table
150  UPDATE_CACHE(re, &s->gb);
151  if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
152  level = (3 * qscale * quant_matrix[0]) >> 5;
153  level = (level - 1) | 1;
154  if (GET_CACHE(re, &s->gb) & 0x40000000)
155  level = -level;
156  block[0] = level;
157  i++;
158  SKIP_BITS(re, &s->gb, 2);
159  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
160  goto end;
161  }
162  /* now quantify & encode AC coefficients */
163  for (;;) {
164  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
165  TEX_VLC_BITS, 2, 0);
166 
167  if (level != 0) {
168  i += run;
169  if (i > MAX_INDEX)
170  break;
171  j = scantable[i];
172  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
173  level = (level - 1) | 1;
174  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
175  SHOW_SBITS(re, &s->gb, 1);
176  SKIP_BITS(re, &s->gb, 1);
177  } else {
178  /* escape */
179  run = SHOW_UBITS(re, &s->gb, 6) + 1;
180  LAST_SKIP_BITS(re, &s->gb, 6);
181  UPDATE_CACHE(re, &s->gb);
182  level = SHOW_SBITS(re, &s->gb, 8);
183  SKIP_BITS(re, &s->gb, 8);
184  if (level == -128) {
185  level = SHOW_UBITS(re, &s->gb, 8) - 256;
186  SKIP_BITS(re, &s->gb, 8);
187  } else if (level == 0) {
188  level = SHOW_UBITS(re, &s->gb, 8);
189  SKIP_BITS(re, &s->gb, 8);
190  }
191  i += run;
192  if (i > MAX_INDEX)
193  break;
194  j = scantable[i];
195  if (level < 0) {
196  level = -level;
197  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
198  level = (level - 1) | 1;
199  level = -level;
200  } else {
201  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
202  level = (level - 1) | 1;
203  }
204  }
205 
206  block[j] = level;
207  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
208  break;
209  UPDATE_CACHE(re, &s->gb);
210  }
211 end:
212  LAST_SKIP_BITS(re, &s->gb, 2);
213  CLOSE_READER(re, &s->gb);
214  }
215 
216  check_scantable_index(s, i);
217 
218  s->block_last_index[n] = i;
219  return 0;
220 }
221 
222 /**
223  * Note: this function can read out of range and crash for corrupt streams.
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  * Note: this function can read out of range and crash for corrupt streams.
400  * Changing this would eat up any speed benefits it has.
401  * Do not use "fast" flag if you need the code to be robust.
402  */
404  int16_t *block, int n)
405 {
406  int level, i, j, run;
407  RLTable *rl = &ff_rl_mpeg1;
408  uint8_t *const scantable = s->intra_scantable.permutated;
409  const int qscale = s->qscale;
410  OPEN_READER(re, &s->gb);
411  i = -1;
412 
413  // special case for first coefficient, no need to add second VLC table
414  UPDATE_CACHE(re, &s->gb);
415  if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
416  level = (3 * qscale) >> 1;
417  if (GET_CACHE(re, &s->gb) & 0x40000000)
418  level = -level;
419  block[0] = level;
420  i++;
421  SKIP_BITS(re, &s->gb, 2);
422  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
423  goto end;
424  }
425 
426  /* now quantify & encode AC coefficients */
427  for (;;) {
428  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
429 
430  if (level != 0) {
431  i += run;
432  if (i > MAX_INDEX)
433  break;
434  j = scantable[i];
435  level = ((level * 2 + 1) * qscale) >> 1;
436  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
437  SHOW_SBITS(re, &s->gb, 1);
438  SKIP_BITS(re, &s->gb, 1);
439  } else {
440  /* escape */
441  run = SHOW_UBITS(re, &s->gb, 6) + 1;
442  LAST_SKIP_BITS(re, &s->gb, 6);
443  UPDATE_CACHE(re, &s->gb);
444  level = SHOW_SBITS(re, &s->gb, 12);
445  SKIP_BITS(re, &s->gb, 12);
446 
447  i += run;
448  if (i > MAX_INDEX)
449  break;
450  j = scantable[i];
451  if (level < 0) {
452  level = ((-level * 2 + 1) * qscale) >> 1;
453  level = -level;
454  } else {
455  level = ((level * 2 + 1) * qscale) >> 1;
456  }
457  }
458 
459  block[j] = level;
460  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF || i > 63)
461  break;
462 
463  UPDATE_CACHE(re, &s->gb);
464  }
465 end:
466  LAST_SKIP_BITS(re, &s->gb, 2);
467  CLOSE_READER(re, &s->gb);
468 
469  check_scantable_index(s, i);
470 
471  s->block_last_index[n] = i;
472  return 0;
473 }
474 
476  int16_t *block, int n)
477 {
478  int level, dc, diff, i, j, run;
479  int component;
480  RLTable *rl;
481  uint8_t *const scantable = s->intra_scantable.permutated;
482  const uint16_t *quant_matrix;
483  const int qscale = s->qscale;
484  int mismatch;
485 
486  /* DC coefficient */
487  if (n < 4) {
488  quant_matrix = s->intra_matrix;
489  component = 0;
490  } else {
491  quant_matrix = s->chroma_intra_matrix;
492  component = (n & 1) + 1;
493  }
494  diff = decode_dc(&s->gb, component);
495  if (diff >= 0xffff)
496  return AVERROR_INVALIDDATA;
497  dc = s->last_dc[component];
498  dc += diff;
499  s->last_dc[component] = dc;
500  block[0] = dc * (1 << (3 - s->intra_dc_precision));
501  ff_tlog(s->avctx, "dc=%d\n", block[0]);
502  mismatch = block[0] ^ 1;
503  i = 0;
504  if (s->intra_vlc_format)
505  rl = &ff_rl_mpeg2;
506  else
507  rl = &ff_rl_mpeg1;
508 
509  {
510  OPEN_READER(re, &s->gb);
511  /* now quantify & encode AC coefficients */
512  for (;;) {
513  UPDATE_CACHE(re, &s->gb);
514  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
515  TEX_VLC_BITS, 2, 0);
516 
517  if (level == 127) {
518  break;
519  } else if (level != 0) {
520  i += run;
521  if (i > MAX_INDEX)
522  break;
523  j = scantable[i];
524  level = (level * qscale * quant_matrix[j]) >> 4;
525  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
526  SHOW_SBITS(re, &s->gb, 1);
527  LAST_SKIP_BITS(re, &s->gb, 1);
528  } else {
529  /* escape */
530  run = SHOW_UBITS(re, &s->gb, 6) + 1;
531  LAST_SKIP_BITS(re, &s->gb, 6);
532  UPDATE_CACHE(re, &s->gb);
533  level = SHOW_SBITS(re, &s->gb, 12);
534  SKIP_BITS(re, &s->gb, 12);
535  i += run;
536  if (i > MAX_INDEX)
537  break;
538  j = scantable[i];
539  if (level < 0) {
540  level = (-level * qscale * quant_matrix[j]) >> 4;
541  level = -level;
542  } else {
543  level = (level * qscale * quant_matrix[j]) >> 4;
544  }
545  }
546 
547  mismatch ^= level;
548  block[j] = level;
549  }
550  CLOSE_READER(re, &s->gb);
551  }
552  block[63] ^= mismatch & 1;
553 
554  check_scantable_index(s, i);
555 
556  s->block_last_index[n] = i;
557  return 0;
558 }
559 
560 /**
561  * Note: this function can read out of range and crash for corrupt streams.
562  * Changing this would eat up any speed benefits it has.
563  * Do not use "fast" flag if you need the code to be robust.
564  */
566  int16_t *block, int n)
567 {
568  int level, dc, diff, i, j, run;
569  int component;
570  RLTable *rl;
571  uint8_t *const scantable = s->intra_scantable.permutated;
572  const uint16_t *quant_matrix;
573  const int qscale = s->qscale;
574 
575  /* DC coefficient */
576  if (n < 4) {
577  quant_matrix = s->intra_matrix;
578  component = 0;
579  } else {
580  quant_matrix = s->chroma_intra_matrix;
581  component = (n & 1) + 1;
582  }
583  diff = decode_dc(&s->gb, component);
584  if (diff >= 0xffff)
585  return AVERROR_INVALIDDATA;
586  dc = s->last_dc[component];
587  dc += diff;
588  s->last_dc[component] = dc;
589  block[0] = dc << (3 - s->intra_dc_precision);
590  i = 0;
591  if (s->intra_vlc_format)
592  rl = &ff_rl_mpeg2;
593  else
594  rl = &ff_rl_mpeg1;
595 
596  {
597  OPEN_READER(re, &s->gb);
598  /* now quantify & encode AC coefficients */
599  for (;;) {
600  UPDATE_CACHE(re, &s->gb);
601  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
602  TEX_VLC_BITS, 2, 0);
603 
604  if (level >= 64 || i > 63) {
605  break;
606  } else if (level != 0) {
607  i += run;
608  j = scantable[i];
609  level = (level * qscale * quant_matrix[j]) >> 4;
610  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
611  SHOW_SBITS(re, &s->gb, 1);
612  LAST_SKIP_BITS(re, &s->gb, 1);
613  } else {
614  /* escape */
615  run = SHOW_UBITS(re, &s->gb, 6) + 1;
616  LAST_SKIP_BITS(re, &s->gb, 6);
617  UPDATE_CACHE(re, &s->gb);
618  level = SHOW_SBITS(re, &s->gb, 12);
619  SKIP_BITS(re, &s->gb, 12);
620  i += run;
621  j = scantable[i];
622  if (level < 0) {
623  level = (-level * qscale * quant_matrix[j]) >> 4;
624  level = -level;
625  } else {
626  level = (level * qscale * quant_matrix[j]) >> 4;
627  }
628  }
629 
630  block[j] = level;
631  }
632  CLOSE_READER(re, &s->gb);
633  }
634 
635  check_scantable_index(s, i);
636 
637  s->block_last_index[n] = i;
638  return 0;
639 }
640 
641 /******************************************/
642 /* decoding */
643 
644 static inline int get_dmv(MpegEncContext *s)
645 {
646  if (get_bits1(&s->gb))
647  return 1 - (get_bits1(&s->gb) << 1);
648  else
649  return 0;
650 }
651 
652 static inline int get_qscale(MpegEncContext *s)
653 {
654  int qscale = get_bits(&s->gb, 5);
655  if (s->q_scale_type)
656  return ff_mpeg2_non_linear_qscale[qscale];
657  else
658  return qscale << 1;
659 }
660 
661 
662 /* motion type (for MPEG-2) */
663 #define MT_FIELD 1
664 #define MT_FRAME 2
665 #define MT_16X8 2
666 #define MT_DMV 3
667 
668 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
669 {
670  int i, j, k, cbp, val, mb_type, motion_type;
671  const int mb_block_count = 4 + (1 << s->chroma_format);
672  int ret;
673 
674  ff_tlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
675 
676  av_assert2(s->mb_skipped == 0);
677 
678  if (s->mb_skip_run-- != 0) {
679  if (s->pict_type == AV_PICTURE_TYPE_P) {
680  s->mb_skipped = 1;
681  s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
683  } else {
684  int mb_type;
685 
686  if (s->mb_x)
687  mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
688  else
689  // FIXME not sure if this is allowed in MPEG at all
690  mb_type = s->current_picture.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1];
691  if (IS_INTRA(mb_type)) {
692  av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
693  return AVERROR_INVALIDDATA;
694  }
695  s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
696  mb_type | MB_TYPE_SKIP;
697 
698  if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
699  s->mb_skipped = 1;
700  }
701 
702  return 0;
703  }
704 
705  switch (s->pict_type) {
706  default:
707  case AV_PICTURE_TYPE_I:
708  if (get_bits1(&s->gb) == 0) {
709  if (get_bits1(&s->gb) == 0) {
711  "Invalid mb type in I-frame at %d %d\n",
712  s->mb_x, s->mb_y);
713  return AVERROR_INVALIDDATA;
714  }
715  mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
716  } else {
717  mb_type = MB_TYPE_INTRA;
718  }
719  break;
720  case AV_PICTURE_TYPE_P:
721  mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
722  if (mb_type < 0) {
724  "Invalid mb type in P-frame at %d %d\n", s->mb_x, s->mb_y);
725  return AVERROR_INVALIDDATA;
726  }
727  mb_type = ptype2mb_type[mb_type];
728  break;
729  case AV_PICTURE_TYPE_B:
730  mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
731  if (mb_type < 0) {
733  "Invalid mb type in B-frame at %d %d\n", s->mb_x, s->mb_y);
734  return AVERROR_INVALIDDATA;
735  }
736  mb_type = btype2mb_type[mb_type];
737  break;
738  }
739  ff_tlog(s->avctx, "mb_type=%x\n", mb_type);
740 // motion_type = 0; /* avoid warning */
741  if (IS_INTRA(mb_type)) {
742  s->bdsp.clear_blocks(s->block[0]);
743 
744  if (!s->chroma_y_shift)
745  s->bdsp.clear_blocks(s->block[6]);
746 
747  /* compute DCT type */
748  // FIXME: add an interlaced_dct coded var?
749  if (s->picture_structure == PICT_FRAME &&
751  s->interlaced_dct = get_bits1(&s->gb);
752 
753  if (IS_QUANT(mb_type))
754  s->qscale = get_qscale(s);
755 
757  /* just parse them */
758  if (s->picture_structure != PICT_FRAME)
759  skip_bits1(&s->gb); /* field select */
760 
761  s->mv[0][0][0] =
762  s->last_mv[0][0][0] =
763  s->last_mv[0][1][0] = mpeg_decode_motion(s, s->mpeg_f_code[0][0],
764  s->last_mv[0][0][0]);
765  s->mv[0][0][1] =
766  s->last_mv[0][0][1] =
767  s->last_mv[0][1][1] = mpeg_decode_motion(s, s->mpeg_f_code[0][1],
768  s->last_mv[0][0][1]);
769 
770  check_marker(s->avctx, &s->gb, "after concealment_motion_vectors");
771  } else {
772  /* reset mv prediction */
773  memset(s->last_mv, 0, sizeof(s->last_mv));
774  }
775  s->mb_intra = 1;
776  // if 1, we memcpy blocks in xvmcvideo
777  if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
778  ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
779 
780  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
781  if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
782  for (i = 0; i < 6; i++)
784  } else {
785  for (i = 0; i < mb_block_count; i++)
786  if ((ret = mpeg2_decode_block_intra(s, *s->pblocks[i], i)) < 0)
787  return ret;
788  }
789  } else {
790  for (i = 0; i < 6; i++) {
792  s->intra_matrix,
794  s->last_dc, *s->pblocks[i],
795  i, s->qscale);
796  if (ret < 0) {
797  av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n",
798  s->mb_x, s->mb_y);
799  return ret;
800  }
801 
802  s->block_last_index[i] = ret;
803  }
804  }
805  } else {
806  if (mb_type & MB_TYPE_ZERO_MV) {
807  av_assert2(mb_type & MB_TYPE_CBP);
808 
809  s->mv_dir = MV_DIR_FORWARD;
810  if (s->picture_structure == PICT_FRAME) {
811  if (s->picture_structure == PICT_FRAME
812  && !s->frame_pred_frame_dct)
813  s->interlaced_dct = get_bits1(&s->gb);
814  s->mv_type = MV_TYPE_16X16;
815  } else {
816  s->mv_type = MV_TYPE_FIELD;
817  mb_type |= MB_TYPE_INTERLACED;
818  s->field_select[0][0] = s->picture_structure - 1;
819  }
820 
821  if (IS_QUANT(mb_type))
822  s->qscale = get_qscale(s);
823 
824  s->last_mv[0][0][0] = 0;
825  s->last_mv[0][0][1] = 0;
826  s->last_mv[0][1][0] = 0;
827  s->last_mv[0][1][1] = 0;
828  s->mv[0][0][0] = 0;
829  s->mv[0][0][1] = 0;
830  } else {
831  av_assert2(mb_type & MB_TYPE_L0L1);
832  // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
833  /* get additional motion vector type */
835  motion_type = MT_FRAME;
836  } else {
837  motion_type = get_bits(&s->gb, 2);
838  if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
839  s->interlaced_dct = get_bits1(&s->gb);
840  }
841 
842  if (IS_QUANT(mb_type))
843  s->qscale = get_qscale(s);
844 
845  /* motion vectors */
846  s->mv_dir = (mb_type >> 13) & 3;
847  ff_tlog(s->avctx, "motion_type=%d\n", motion_type);
848  switch (motion_type) {
849  case MT_FRAME: /* or MT_16X8 */
850  if (s->picture_structure == PICT_FRAME) {
851  mb_type |= MB_TYPE_16x16;
852  s->mv_type = MV_TYPE_16X16;
853  for (i = 0; i < 2; i++) {
854  if (USES_LIST(mb_type, i)) {
855  /* MT_FRAME */
856  s->mv[i][0][0] =
857  s->last_mv[i][0][0] =
858  s->last_mv[i][1][0] =
859  mpeg_decode_motion(s, s->mpeg_f_code[i][0],
860  s->last_mv[i][0][0]);
861  s->mv[i][0][1] =
862  s->last_mv[i][0][1] =
863  s->last_mv[i][1][1] =
864  mpeg_decode_motion(s, s->mpeg_f_code[i][1],
865  s->last_mv[i][0][1]);
866  /* full_pel: only for MPEG-1 */
867  if (s->full_pel[i]) {
868  s->mv[i][0][0] *= 2;
869  s->mv[i][0][1] *= 2;
870  }
871  }
872  }
873  } else {
874  mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
875  s->mv_type = MV_TYPE_16X8;
876  for (i = 0; i < 2; i++) {
877  if (USES_LIST(mb_type, i)) {
878  /* MT_16X8 */
879  for (j = 0; j < 2; j++) {
880  s->field_select[i][j] = get_bits1(&s->gb);
881  for (k = 0; k < 2; k++) {
882  val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
883  s->last_mv[i][j][k]);
884  s->last_mv[i][j][k] = val;
885  s->mv[i][j][k] = val;
886  }
887  }
888  }
889  }
890  }
891  break;
892  case MT_FIELD:
893  s->mv_type = MV_TYPE_FIELD;
894  if (s->picture_structure == PICT_FRAME) {
895  mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
896  for (i = 0; i < 2; i++) {
897  if (USES_LIST(mb_type, i)) {
898  for (j = 0; j < 2; j++) {
899  s->field_select[i][j] = get_bits1(&s->gb);
900  val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
901  s->last_mv[i][j][0]);
902  s->last_mv[i][j][0] = val;
903  s->mv[i][j][0] = val;
904  ff_tlog(s->avctx, "fmx=%d\n", val);
905  val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
906  s->last_mv[i][j][1] >> 1);
907  s->last_mv[i][j][1] = 2 * val;
908  s->mv[i][j][1] = val;
909  ff_tlog(s->avctx, "fmy=%d\n", val);
910  }
911  }
912  }
913  } else {
915  mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
916  for (i = 0; i < 2; i++) {
917  if (USES_LIST(mb_type, i)) {
918  s->field_select[i][0] = get_bits1(&s->gb);
919  for (k = 0; k < 2; k++) {
920  val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
921  s->last_mv[i][0][k]);
922  s->last_mv[i][0][k] = val;
923  s->last_mv[i][1][k] = val;
924  s->mv[i][0][k] = val;
925  }
926  }
927  }
928  }
929  break;
930  case MT_DMV:
931  if (s->progressive_sequence){
932  av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
933  return AVERROR_INVALIDDATA;
934  }
935  s->mv_type = MV_TYPE_DMV;
936  for (i = 0; i < 2; i++) {
937  if (USES_LIST(mb_type, i)) {
938  int dmx, dmy, mx, my, m;
939  const int my_shift = s->picture_structure == PICT_FRAME;
940 
941  mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
942  s->last_mv[i][0][0]);
943  s->last_mv[i][0][0] = mx;
944  s->last_mv[i][1][0] = mx;
945  dmx = get_dmv(s);
946  my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
947  s->last_mv[i][0][1] >> my_shift);
948  dmy = get_dmv(s);
949 
950 
951  s->last_mv[i][0][1] = my * (1 << my_shift);
952  s->last_mv[i][1][1] = my * (1 << my_shift);
953 
954  s->mv[i][0][0] = mx;
955  s->mv[i][0][1] = my;
956  s->mv[i][1][0] = mx; // not used
957  s->mv[i][1][1] = my; // not used
958 
959  if (s->picture_structure == PICT_FRAME) {
960  mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
961 
962  // m = 1 + 2 * s->top_field_first;
963  m = s->top_field_first ? 1 : 3;
964 
965  /* top -> top pred */
966  s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
967  s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
968  m = 4 - m;
969  s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
970  s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
971  } else {
972  mb_type |= MB_TYPE_16x16;
973 
974  s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
975  s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
977  s->mv[i][2][1]--;
978  else
979  s->mv[i][2][1]++;
980  }
981  }
982  }
983  break;
984  default:
986  "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
987  return AVERROR_INVALIDDATA;
988  }
989  }
990 
991  s->mb_intra = 0;
992  if (HAS_CBP(mb_type)) {
993  s->bdsp.clear_blocks(s->block[0]);
994 
996  if (mb_block_count > 6) {
997  cbp *= 1 << mb_block_count - 6;
998  cbp |= get_bits(&s->gb, mb_block_count - 6);
999  s->bdsp.clear_blocks(s->block[6]);
1000  }
1001  if (cbp <= 0) {
1003  "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y);
1004  return AVERROR_INVALIDDATA;
1005  }
1006 
1007  // if 1, we memcpy blocks in xvmcvideo
1008  if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1009  ff_xvmc_pack_pblocks(s, cbp);
1010 
1011  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1012  if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1013  for (i = 0; i < 6; i++) {
1014  if (cbp & 32)
1016  else
1017  s->block_last_index[i] = -1;
1018  cbp += cbp;
1019  }
1020  } else {
1021  cbp <<= 12 - mb_block_count;
1022 
1023  for (i = 0; i < mb_block_count; i++) {
1024  if (cbp & (1 << 11)) {
1025  if ((ret = mpeg2_decode_block_non_intra(s, *s->pblocks[i], i)) < 0)
1026  return ret;
1027  } else {
1028  s->block_last_index[i] = -1;
1029  }
1030  cbp += cbp;
1031  }
1032  }
1033  } else {
1034  if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1035  for (i = 0; i < 6; i++) {
1036  if (cbp & 32)
1037  mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1038  else
1039  s->block_last_index[i] = -1;
1040  cbp += cbp;
1041  }
1042  } else {
1043  for (i = 0; i < 6; i++) {
1044  if (cbp & 32) {
1045  if ((ret = mpeg1_decode_block_inter(s, *s->pblocks[i], i)) < 0)
1046  return ret;
1047  } else {
1048  s->block_last_index[i] = -1;
1049  }
1050  cbp += cbp;
1051  }
1052  }
1053  }
1054  } else {
1055  for (i = 0; i < 12; i++)
1056  s->block_last_index[i] = -1;
1057  }
1058  }
1059 
1060  s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1061 
1062  return 0;
1063 }
1064 
1066 {
1067  Mpeg1Context *s = avctx->priv_data;
1069 
1071 
1072  if ( avctx->codec_tag != AV_RL32("VCR2")
1073  && avctx->codec_tag != AV_RL32("BW10"))
1074  avctx->coded_width = avctx->coded_height = 0; // do not trust dimensions from input
1075  ff_mpv_decode_init(s2, avctx);
1076 
1077  s->mpeg_enc_ctx.avctx = avctx;
1078 
1079  /* we need some permutation to store matrices,
1080  * until the decoder sets the real permutation. */
1081  ff_mpv_idct_init(s2);
1084 
1085  s2->chroma_format = 1;
1086  s->mpeg_enc_ctx_allocated = 0;
1088  s->repeat_field = 0;
1089  s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1090  avctx->color_range = AVCOL_RANGE_MPEG;
1091  return 0;
1092 }
1093 
1094 #if HAVE_THREADS
1095 static int mpeg_decode_update_thread_context(AVCodecContext *avctx,
1096  const AVCodecContext *avctx_from)
1097 {
1098  Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1099  MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1100  int err;
1101 
1102  if (avctx == avctx_from ||
1103  !ctx_from->mpeg_enc_ctx_allocated ||
1104  !s1->context_initialized)
1105  return 0;
1106 
1107  err = ff_mpeg_update_thread_context(avctx, avctx_from);
1108  if (err)
1109  return err;
1110 
1111  if (!ctx->mpeg_enc_ctx_allocated)
1112  memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1113 
1114  if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1115  s->picture_number++;
1116 
1117  return 0;
1118 }
1119 #endif
1120 
1121 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1122  const uint8_t *new_perm)
1123 {
1124  uint16_t temp_matrix[64];
1125  int i;
1126 
1127  memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1128 
1129  for (i = 0; i < 64; i++)
1130  matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1131 }
1132 
1134 #if CONFIG_MPEG1_NVDEC_HWACCEL
1136 #endif
1137 #if CONFIG_MPEG1_XVMC_HWACCEL
1139 #endif
1140 #if CONFIG_MPEG1_VDPAU_HWACCEL
1142 #endif
1145 };
1146 
1148 #if CONFIG_MPEG2_NVDEC_HWACCEL
1150 #endif
1151 #if CONFIG_MPEG2_XVMC_HWACCEL
1153 #endif
1154 #if CONFIG_MPEG2_VDPAU_HWACCEL
1156 #endif
1157 #if CONFIG_MPEG2_DXVA2_HWACCEL
1159 #endif
1160 #if CONFIG_MPEG2_D3D11VA_HWACCEL
1163 #endif
1164 #if CONFIG_MPEG2_VAAPI_HWACCEL
1166 #endif
1167 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
1169 #endif
1172 };
1173 
1174 static const enum AVPixelFormat mpeg12_pixfmt_list_422[] = {
1177 };
1178 
1179 static const enum AVPixelFormat mpeg12_pixfmt_list_444[] = {
1182 };
1183 
1185 {
1186  Mpeg1Context *s1 = avctx->priv_data;
1187  MpegEncContext *s = &s1->mpeg_enc_ctx;
1188  const enum AVPixelFormat *pix_fmts;
1189 
1190  if (CONFIG_GRAY && (avctx->flags & AV_CODEC_FLAG_GRAY))
1191  return AV_PIX_FMT_GRAY8;
1192 
1193  if (s->chroma_format < 2)
1194  pix_fmts = avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1195  mpeg1_hwaccel_pixfmt_list_420 :
1197  else if (s->chroma_format == 2)
1198  pix_fmts = mpeg12_pixfmt_list_422;
1199  else
1200  pix_fmts = mpeg12_pixfmt_list_444;
1201 
1202  return ff_thread_get_format(avctx, pix_fmts);
1203 }
1204 
1206 {
1207  // until then pix_fmt may be changed right after codec init
1208  if (avctx->hwaccel)
1209  if (avctx->idct_algo == FF_IDCT_AUTO)
1210  avctx->idct_algo = FF_IDCT_NONE;
1211 
1212  if (avctx->hwaccel && avctx->pix_fmt == AV_PIX_FMT_XVMC) {
1213  Mpeg1Context *s1 = avctx->priv_data;
1214  MpegEncContext *s = &s1->mpeg_enc_ctx;
1215 
1216  s->pack_pblocks = 1;
1217  }
1218 }
1219 
1220 /* Call this function when we know all parameters.
1221  * It may be called in different places for MPEG-1 and MPEG-2. */
1223 {
1224  Mpeg1Context *s1 = avctx->priv_data;
1225  MpegEncContext *s = &s1->mpeg_enc_ctx;
1226  uint8_t old_permutation[64];
1227  int ret;
1228 
1229  if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1230  // MPEG-1 aspect
1231  AVRational aspect_inv = av_d2q(ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1232  avctx->sample_aspect_ratio = (AVRational) { aspect_inv.den, aspect_inv.num };
1233  } else { // MPEG-2
1234  // MPEG-2 aspect
1235  if (s->aspect_ratio_info > 1) {
1236  AVRational dar =
1238  (AVRational) { s1->pan_scan.width,
1239  s1->pan_scan.height }),
1240  (AVRational) { s->width, s->height });
1241 
1242  /* We ignore the spec here and guess a bit as reality does not
1243  * match the spec, see for example res_change_ffmpeg_aspect.ts
1244  * and sequence-display-aspect.mpg.
1245  * issue1613, 621, 562 */
1246  if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1247  (av_cmp_q(dar, (AVRational) { 4, 3 }) &&
1248  av_cmp_q(dar, (AVRational) { 16, 9 }))) {
1251  (AVRational) { s->width, s->height });
1252  } else {
1255  (AVRational) { s1->pan_scan.width, s1->pan_scan.height });
1256 // issue1613 4/3 16/9 -> 16/9
1257 // res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1258 // widescreen-issue562.mpg 4/3 16/9 -> 16/9
1259 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1260  ff_dlog(avctx, "aspect A %d/%d\n",
1263  ff_dlog(avctx, "aspect B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1265  }
1266  } else {
1269  }
1270  } // MPEG-2
1271 
1272  if (av_image_check_sar(s->width, s->height,
1273  avctx->sample_aspect_ratio) < 0) {
1274  av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
1275  avctx->sample_aspect_ratio.num,
1276  avctx->sample_aspect_ratio.den);
1277  avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
1278  }
1279 
1280  if ((s1->mpeg_enc_ctx_allocated == 0) ||
1281  avctx->coded_width != s->width ||
1282  avctx->coded_height != s->height ||
1283  s1->save_width != s->width ||
1284  s1->save_height != s->height ||
1285  av_cmp_q(s1->save_aspect, s->avctx->sample_aspect_ratio) ||
1286  (s1->save_progressive_seq != s->progressive_sequence && FFALIGN(s->height, 16) != FFALIGN(s->height, 32)) ||
1287  0) {
1288  if (s1->mpeg_enc_ctx_allocated) {
1289  ParseContext pc = s->parse_context;
1290  s->parse_context.buffer = 0;
1291  ff_mpv_common_end(s);
1292  s->parse_context = pc;
1293  s1->mpeg_enc_ctx_allocated = 0;
1294  }
1295 
1296  ret = ff_set_dimensions(avctx, s->width, s->height);
1297  if (ret < 0)
1298  return ret;
1299 
1300  if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1301  avctx->rc_max_rate = s->bit_rate;
1302  } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1303  (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1304  avctx->bit_rate = s->bit_rate;
1305  }
1306  s1->save_aspect = s->avctx->sample_aspect_ratio;
1307  s1->save_width = s->width;
1308  s1->save_height = s->height;
1309  s1->save_progressive_seq = s->progressive_sequence;
1310 
1311  /* low_delay may be forced, in this case we will have B-frames
1312  * that behave like P-frames. */
1313  avctx->has_b_frames = !s->low_delay;
1314 
1315  if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1316  // MPEG-1 fps
1318  avctx->ticks_per_frame = 1;
1319 
1321  } else { // MPEG-2
1322  // MPEG-2 fps
1324  &s->avctx->framerate.den,
1325  ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num,
1326  ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1327  1 << 30);
1328  avctx->ticks_per_frame = 2;
1329 
1330  switch (s->chroma_format) {
1331  case 1: avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; break;
1332  case 2:
1333  case 3: avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; break;
1334  default: av_assert0(0);
1335  }
1336  } // MPEG-2
1337 
1338  avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1339  setup_hwaccel_for_pixfmt(avctx);
1340 
1341  /* Quantization matrices may need reordering
1342  * if DCT permutation is changed. */
1343  memcpy(old_permutation, s->idsp.idct_permutation, 64 * sizeof(uint8_t));
1344 
1345  ff_mpv_idct_init(s);
1346  if ((ret = ff_mpv_common_init(s)) < 0)
1347  return ret;
1348 
1349  quant_matrix_rebuild(s->intra_matrix, old_permutation, s->idsp.idct_permutation);
1350  quant_matrix_rebuild(s->inter_matrix, old_permutation, s->idsp.idct_permutation);
1353 
1354  s1->mpeg_enc_ctx_allocated = 1;
1355  }
1356  return 0;
1357 }
1358 
1360  int buf_size)
1361 {
1362  Mpeg1Context *s1 = avctx->priv_data;
1363  MpegEncContext *s = &s1->mpeg_enc_ctx;
1364  int ref, f_code, vbv_delay;
1365 
1366  init_get_bits(&s->gb, buf, buf_size * 8);
1367 
1368  ref = get_bits(&s->gb, 10); /* temporal ref */
1369  s->pict_type = get_bits(&s->gb, 3);
1370  if (s->pict_type == 0 || s->pict_type > 3)
1371  return AVERROR_INVALIDDATA;
1372 
1373  vbv_delay = get_bits(&s->gb, 16);
1374  s->vbv_delay = vbv_delay;
1375  if (s->pict_type == AV_PICTURE_TYPE_P ||
1376  s->pict_type == AV_PICTURE_TYPE_B) {
1377  s->full_pel[0] = get_bits1(&s->gb);
1378  f_code = get_bits(&s->gb, 3);
1379  if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1380  return AVERROR_INVALIDDATA;
1381  f_code += !f_code;
1382  s->mpeg_f_code[0][0] = f_code;
1383  s->mpeg_f_code[0][1] = f_code;
1384  }
1385  if (s->pict_type == AV_PICTURE_TYPE_B) {
1386  s->full_pel[1] = get_bits1(&s->gb);
1387  f_code = get_bits(&s->gb, 3);
1388  if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1389  return AVERROR_INVALIDDATA;
1390  f_code += !f_code;
1391  s->mpeg_f_code[1][0] = f_code;
1392  s->mpeg_f_code[1][1] = f_code;
1393  }
1396 
1397  if (avctx->debug & FF_DEBUG_PICT_INFO)
1398  av_log(avctx, AV_LOG_DEBUG,
1399  "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1400 
1401  s->y_dc_scale = 8;
1402  s->c_dc_scale = 8;
1403  return 0;
1404 }
1405 
1407 {
1408  MpegEncContext *s = &s1->mpeg_enc_ctx;
1409  int horiz_size_ext, vert_size_ext;
1410  int bit_rate_ext;
1411 
1412  skip_bits(&s->gb, 1); /* profile and level esc*/
1413  s->avctx->profile = get_bits(&s->gb, 3);
1414  s->avctx->level = get_bits(&s->gb, 4);
1415  s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1416  s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1417 
1418  if (!s->chroma_format) {
1419  s->chroma_format = 1;
1420  av_log(s->avctx, AV_LOG_WARNING, "Chroma format invalid\n");
1421  }
1422 
1423  horiz_size_ext = get_bits(&s->gb, 2);
1424  vert_size_ext = get_bits(&s->gb, 2);
1425  s->width |= (horiz_size_ext << 12);
1426  s->height |= (vert_size_ext << 12);
1427  bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1428  s->bit_rate += (bit_rate_ext << 18) * 400LL;
1429  check_marker(s->avctx, &s->gb, "after bit rate extension");
1430  s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1431 
1432  s->low_delay = get_bits1(&s->gb);
1434  s->low_delay = 1;
1435 
1436  s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1437  s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1438 
1439  ff_dlog(s->avctx, "sequence extension\n");
1441 
1442  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1444  "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%"PRId64"\n",
1446  s->avctx->rc_buffer_size, s->bit_rate);
1447 }
1448 
1450 {
1451  MpegEncContext *s = &s1->mpeg_enc_ctx;
1452  int color_description, w, h;
1453 
1454  skip_bits(&s->gb, 3); /* video format */
1455  color_description = get_bits1(&s->gb);
1456  if (color_description) {
1457  s->avctx->color_primaries = get_bits(&s->gb, 8);
1458  s->avctx->color_trc = get_bits(&s->gb, 8);
1459  s->avctx->colorspace = get_bits(&s->gb, 8);
1460  }
1461  w = get_bits(&s->gb, 14);
1462  skip_bits(&s->gb, 1); // marker
1463  h = get_bits(&s->gb, 14);
1464  // remaining 3 bits are zero padding
1465 
1466  s1->pan_scan.width = 16 * w;
1467  s1->pan_scan.height = 16 * h;
1468 
1469  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1470  av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1471 }
1472 
1474 {
1475  MpegEncContext *s = &s1->mpeg_enc_ctx;
1476  int i, nofco;
1477 
1478  nofco = 1;
1479  if (s->progressive_sequence) {
1480  if (s->repeat_first_field) {
1481  nofco++;
1482  if (s->top_field_first)
1483  nofco++;
1484  }
1485  } else {
1486  if (s->picture_structure == PICT_FRAME) {
1487  nofco++;
1488  if (s->repeat_first_field)
1489  nofco++;
1490  }
1491  }
1492  for (i = 0; i < nofco; i++) {
1493  s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1494  skip_bits(&s->gb, 1); // marker
1495  s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1496  skip_bits(&s->gb, 1); // marker
1497  }
1498 
1499  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1501  "pde (%"PRId16",%"PRId16") (%"PRId16",%"PRId16") (%"PRId16",%"PRId16")\n",
1502  s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1503  s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1504  s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1505 }
1506 
1507 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64],
1508  uint16_t matrix1[64], int intra)
1509 {
1510  int i;
1511 
1512  for (i = 0; i < 64; i++) {
1513  int j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
1514  int v = get_bits(&s->gb, 8);
1515  if (v == 0) {
1516  av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1517  return AVERROR_INVALIDDATA;
1518  }
1519  if (intra && i == 0 && v != 8) {
1520  av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1521  v = 8; // needed by pink.mpg / issue1046
1522  }
1523  matrix0[j] = v;
1524  if (matrix1)
1525  matrix1[j] = v;
1526  }
1527  return 0;
1528 }
1529 
1531 {
1532  ff_dlog(s->avctx, "matrix extension\n");
1533 
1534  if (get_bits1(&s->gb))
1536  if (get_bits1(&s->gb))
1538  if (get_bits1(&s->gb))
1540  if (get_bits1(&s->gb))
1542 }
1543 
1545 {
1546  MpegEncContext *s = &s1->mpeg_enc_ctx;
1547 
1548  s->full_pel[0] = s->full_pel[1] = 0;
1549  s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1550  s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1551  s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1552  s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1553  if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1555  "Missing picture start code, guessing missing values\n");
1556  if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1557  if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1559  else
1561  } else
1565  }
1566  s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1567  s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1568  s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1569  s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1570 
1571  s->intra_dc_precision = get_bits(&s->gb, 2);
1572  s->picture_structure = get_bits(&s->gb, 2);
1573  s->top_field_first = get_bits1(&s->gb);
1574  s->frame_pred_frame_dct = get_bits1(&s->gb);
1576  s->q_scale_type = get_bits1(&s->gb);
1577  s->intra_vlc_format = get_bits1(&s->gb);
1578  s->alternate_scan = get_bits1(&s->gb);
1579  s->repeat_first_field = get_bits1(&s->gb);
1580  s->chroma_420_type = get_bits1(&s->gb);
1581  s->progressive_frame = get_bits1(&s->gb);
1582 
1583  if (s->alternate_scan) {
1586  } else {
1589  }
1590 
1591  /* composite display not parsed */
1592  ff_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1593  ff_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1594  ff_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1595  ff_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1596  ff_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1597  ff_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1598  ff_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1599  ff_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1600  ff_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1601 }
1602 
1603 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1604 {
1605  AVCodecContext *avctx = s->avctx;
1606  Mpeg1Context *s1 = (Mpeg1Context *) s;
1607  int ret;
1608 
1609  /* start frame decoding */
1610  if (s->first_field || s->picture_structure == PICT_FRAME) {
1611  AVFrameSideData *pan_scan;
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 
1667  if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
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 &&
1679  if ((ret = s->avctx->hwaccel->end_frame(s->avctx)) < 0) {
1680  av_log(avctx, AV_LOG_ERROR,
1681  "hardware accelerator failed to decode first field\n");
1682  return ret;
1683  }
1684  }
1685 
1686  for (i = 0; i < 4; i++) {
1687  s->current_picture.f->data[i] = s->current_picture_ptr->f->data[i];
1689  s->current_picture.f->data[i] +=
1690  s->current_picture_ptr->f->linesize[i];
1691  }
1692  }
1693 
1694  if (avctx->hwaccel) {
1695  if ((ret = avctx->hwaccel->start_frame(avctx, buf, buf_size)) < 0)
1696  return ret;
1697  }
1698 
1699  return 0;
1700 }
1701 
1702 #define DECODE_SLICE_ERROR -1
1703 #define DECODE_SLICE_OK 0
1704 
1705 /**
1706  * Decode a slice.
1707  * MpegEncContext.mb_y must be set to the MB row from the startcode.
1708  * @return DECODE_SLICE_ERROR if the slice is damaged,
1709  * DECODE_SLICE_OK if this slice is OK
1710  */
1711 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1712  const uint8_t **buf, int buf_size)
1713 {
1714  AVCodecContext *avctx = s->avctx;
1715  const int lowres = s->avctx->lowres;
1716  const int field_pic = s->picture_structure != PICT_FRAME;
1717  int ret;
1718 
1719  s->resync_mb_x =
1720  s->resync_mb_y = -1;
1721 
1722  av_assert0(mb_y < s->mb_height);
1723 
1724  init_get_bits(&s->gb, *buf, buf_size * 8);
1725  if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1726  skip_bits(&s->gb, 3);
1727 
1729  s->interlaced_dct = 0;
1730 
1731  s->qscale = get_qscale(s);
1732 
1733  if (s->qscale == 0) {
1734  av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1735  return AVERROR_INVALIDDATA;
1736  }
1737 
1738  /* extra slice info */
1739  if (skip_1stop_8data_bits(&s->gb) < 0)
1740  return AVERROR_INVALIDDATA;
1741 
1742  s->mb_x = 0;
1743 
1744  if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1745  skip_bits1(&s->gb);
1746  } else {
1747  while (get_bits_left(&s->gb) > 0) {
1748  int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1749  MBINCR_VLC_BITS, 2);
1750  if (code < 0) {
1751  av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1752  return AVERROR_INVALIDDATA;
1753  }
1754  if (code >= 33) {
1755  if (code == 33)
1756  s->mb_x += 33;
1757  /* otherwise, stuffing, nothing to do */
1758  } else {
1759  s->mb_x += code;
1760  break;
1761  }
1762  }
1763  }
1764 
1765  if (s->mb_x >= (unsigned) s->mb_width) {
1766  av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1767  return AVERROR_INVALIDDATA;
1768  }
1769 
1770  if (avctx->hwaccel && avctx->hwaccel->decode_slice) {
1771  const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1772  int start_code = -1;
1773  buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1774  if (buf_end < *buf + buf_size)
1775  buf_end -= 4;
1776  s->mb_y = mb_y;
1777  if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1778  return DECODE_SLICE_ERROR;
1779  *buf = buf_end;
1780  return DECODE_SLICE_OK;
1781  }
1782 
1783  s->resync_mb_x = s->mb_x;
1784  s->resync_mb_y = s->mb_y = mb_y;
1785  s->mb_skip_run = 0;
1787 
1788  if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1789  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1791  "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",
1792  s->qscale,
1793  s->mpeg_f_code[0][0], s->mpeg_f_code[0][1],
1794  s->mpeg_f_code[1][0], s->mpeg_f_code[1][1],
1795  s->pict_type == AV_PICTURE_TYPE_I ? "I" :
1796  (s->pict_type == AV_PICTURE_TYPE_P ? "P" :
1797  (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")),
1798  s->progressive_sequence ? "ps" : "",
1799  s->progressive_frame ? "pf" : "",
1800  s->alternate_scan ? "alt" : "",
1801  s->top_field_first ? "top" : "",
1805  s->repeat_first_field, s->chroma_420_type ? "420" : "");
1806  }
1807  }
1808 
1809  for (;;) {
1810  // If 1, we memcpy blocks in xvmcvideo.
1811  if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1812  ff_xvmc_init_block(s); // set s->block
1813 
1814  if ((ret = mpeg_decode_mb(s, s->block)) < 0)
1815  return ret;
1816 
1817  // Note motion_val is normally NULL unless we want to extract the MVs.
1818  if (s->current_picture.motion_val[0] && !s->encoding) {
1819  const int wrap = s->b8_stride;
1820  int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1821  int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1822  int motion_x, motion_y, dir, i;
1823 
1824  for (i = 0; i < 2; i++) {
1825  for (dir = 0; dir < 2; dir++) {
1826  if (s->mb_intra ||
1827  (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1828  motion_x = motion_y = 0;
1829  } else if (s->mv_type == MV_TYPE_16X16 ||
1830  (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1831  motion_x = s->mv[dir][0][0];
1832  motion_y = s->mv[dir][0][1];
1833  } else { /* if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8)) */
1834  motion_x = s->mv[dir][i][0];
1835  motion_y = s->mv[dir][i][1];
1836  }
1837 
1838  s->current_picture.motion_val[dir][xy][0] = motion_x;
1839  s->current_picture.motion_val[dir][xy][1] = motion_y;
1840  s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1841  s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1842  s->current_picture.ref_index [dir][b8_xy] =
1843  s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1844  av_assert2(s->field_select[dir][i] == 0 ||
1845  s->field_select[dir][i] == 1);
1846  }
1847  xy += wrap;
1848  b8_xy += 2;
1849  }
1850  }
1851 
1852  s->dest[0] += 16 >> lowres;
1853  s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1854  s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1855 
1857 
1858  if (++s->mb_x >= s->mb_width) {
1859  const int mb_size = 16 >> s->avctx->lowres;
1860  int left;
1861 
1862  ff_mpeg_draw_horiz_band(s, mb_size * (s->mb_y >> field_pic), mb_size);
1864 
1865  s->mb_x = 0;
1866  s->mb_y += 1 << field_pic;
1867 
1868  if (s->mb_y >= s->mb_height) {
1869  int left = get_bits_left(&s->gb);
1870  int is_d10 = s->chroma_format == 2 &&
1871  s->pict_type == AV_PICTURE_TYPE_I &&
1872  avctx->profile == 0 && avctx->level == 5 &&
1873  s->intra_dc_precision == 2 &&
1874  s->q_scale_type == 1 && s->alternate_scan == 0 &&
1875  s->progressive_frame == 0
1876  /* vbv_delay == 0xBBB || 0xE10 */;
1877 
1878  if (left >= 32 && !is_d10) {
1879  GetBitContext gb = s->gb;
1880  align_get_bits(&gb);
1881  if (show_bits(&gb, 24) == 0x060E2B) {
1882  av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1883  is_d10 = 1;
1884  }
1885  if (left > 32 && show_bits_long(&gb, 32) == 0x201) {
1886  av_log(avctx, AV_LOG_DEBUG, "skipping m704 alpha (unsupported)\n");
1887  goto eos;
1888  }
1889  }
1890 
1891  if (left < 0 ||
1892  (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) ||
1893  ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1894  av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X at %d %d\n",
1895  left, left>0 ? show_bits(&s->gb, FFMIN(left, 23)) : 0, s->mb_x, s->mb_y);
1896  return AVERROR_INVALIDDATA;
1897  } else
1898  goto eos;
1899  }
1900  // There are some files out there which are missing the last slice
1901  // in cases where the slice is completely outside the visible
1902  // area, we detect this here instead of running into the end expecting
1903  // more data
1904  left = get_bits_left(&s->gb);
1905  if (s->mb_y >= ((s->height + 15) >> 4) &&
1906  !s->progressive_sequence &&
1907  left <= 25 &&
1908  left >= 0 &&
1909  s->mb_skip_run == -1 &&
1910  (!left || show_bits(&s->gb, left) == 0))
1911  goto eos;
1912 
1914  }
1915 
1916  /* skip mb handling */
1917  if (s->mb_skip_run == -1) {
1918  /* read increment again */
1919  s->mb_skip_run = 0;
1920  for (;;) {
1921  int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1922  MBINCR_VLC_BITS, 2);
1923  if (code < 0) {
1924  av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1925  return AVERROR_INVALIDDATA;
1926  }
1927  if (code >= 33) {
1928  if (code == 33) {
1929  s->mb_skip_run += 33;
1930  } else if (code == 35) {
1931  if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1932  av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1933  return AVERROR_INVALIDDATA;
1934  }
1935  goto eos; /* end of slice */
1936  }
1937  /* otherwise, stuffing, nothing to do */
1938  } else {
1939  s->mb_skip_run += code;
1940  break;
1941  }
1942  }
1943  if (s->mb_skip_run) {
1944  int i;
1945  if (s->pict_type == AV_PICTURE_TYPE_I) {
1947  "skipped MB in I-frame at %d %d\n", s->mb_x, s->mb_y);
1948  return AVERROR_INVALIDDATA;
1949  }
1950 
1951  /* skip mb */
1952  s->mb_intra = 0;
1953  for (i = 0; i < 12; i++)
1954  s->block_last_index[i] = -1;
1956  s->mv_type = MV_TYPE_16X16;
1957  else
1958  s->mv_type = MV_TYPE_FIELD;
1959  if (s->pict_type == AV_PICTURE_TYPE_P) {
1960  /* if P type, zero motion vector is implied */
1961  s->mv_dir = MV_DIR_FORWARD;
1962  s->mv[0][0][0] = s->mv[0][0][1] = 0;
1963  s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1964  s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1965  s->field_select[0][0] = (s->picture_structure - 1) & 1;
1966  } else {
1967  /* if B type, reuse previous vectors and directions */
1968  s->mv[0][0][0] = s->last_mv[0][0][0];
1969  s->mv[0][0][1] = s->last_mv[0][0][1];
1970  s->mv[1][0][0] = s->last_mv[1][0][0];
1971  s->mv[1][0][1] = s->last_mv[1][0][1];
1972  s->field_select[0][0] = (s->picture_structure - 1) & 1;
1973  s->field_select[1][0] = (s->picture_structure - 1) & 1;
1974  }
1975  }
1976  }
1977  }
1978 eos: // end of slice
1979  if (get_bits_left(&s->gb) < 0) {
1980  av_log(s, AV_LOG_ERROR, "overread %d\n", -get_bits_left(&s->gb));
1981  return AVERROR_INVALIDDATA;
1982  }
1983  *buf += (get_bits_count(&s->gb) - 1) / 8;
1984  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);
1985  return 0;
1986 }
1987 
1989 {
1990  MpegEncContext *s = *(void **) arg;
1991  const uint8_t *buf = s->gb.buffer;
1992  int mb_y = s->start_mb_y;
1993  const int field_pic = s->picture_structure != PICT_FRAME;
1994 
1995  s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1996 
1997  for (;;) {
1998  uint32_t start_code;
1999  int ret;
2000 
2001  ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
2002  emms_c();
2003  ff_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
2004  ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
2005  s->start_mb_y, s->end_mb_y, s->er.error_count);
2006  if (ret < 0) {
2007  if (c->err_recognition & AV_EF_EXPLODE)
2008  return ret;
2009  if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
2011  s->mb_x, s->mb_y,
2013  } else {
2015  s->mb_x - 1, s->mb_y,
2017  }
2018 
2019  if (s->mb_y == s->end_mb_y)
2020  return 0;
2021 
2022  start_code = -1;
2023  buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
2024  mb_y = start_code - SLICE_MIN_START_CODE;
2025  if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
2026  mb_y += (*buf&0xE0)<<2;
2027  mb_y <<= field_pic;
2029  mb_y++;
2030  if (mb_y < 0 || mb_y >= s->end_mb_y)
2031  return AVERROR_INVALIDDATA;
2032  }
2033 }
2034 
2035 /**
2036  * Handle slice ends.
2037  * @return 1 if it seems to be the last slice
2038  */
2039 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2040 {
2041  Mpeg1Context *s1 = avctx->priv_data;
2042  MpegEncContext *s = &s1->mpeg_enc_ctx;
2043 
2045  return 0;
2046 
2047  if (s->avctx->hwaccel) {
2048  int ret = s->avctx->hwaccel->end_frame(s->avctx);
2049  if (ret < 0) {
2050  av_log(avctx, AV_LOG_ERROR,
2051  "hardware accelerator failed to decode picture\n");
2052  return ret;
2053  }
2054  }
2055 
2056  /* end of slice reached */
2057  if (/* s->mb_y << field_pic == s->mb_height && */ !s->first_field && !s1->first_slice) {
2058  /* end of image */
2059 
2060  ff_er_frame_end(&s->er);
2061 
2062  ff_mpv_frame_end(s);
2063 
2064  if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
2065  int ret = av_frame_ref(pict, s->current_picture_ptr->f);
2066  if (ret < 0)
2067  return ret;
2070  } else {
2071  if (avctx->active_thread_type & FF_THREAD_FRAME)
2072  s->picture_number++;
2073  /* latency of 1 frame for I- and P-frames */
2074  /* XXX: use another variable than picture_number */
2075  if (s->last_picture_ptr) {
2076  int ret = av_frame_ref(pict, s->last_picture_ptr->f);
2077  if (ret < 0)
2078  return ret;
2081  }
2082  }
2083 
2084  return 1;
2085  } else {
2086  return 0;
2087  }
2088 }
2089 
2091  const uint8_t *buf, int buf_size)
2092 {
2093  Mpeg1Context *s1 = avctx->priv_data;
2094  MpegEncContext *s = &s1->mpeg_enc_ctx;
2095  int width, height;
2096  int i, v, j;
2097 
2098  init_get_bits(&s->gb, buf, buf_size * 8);
2099 
2100  width = get_bits(&s->gb, 12);
2101  height = get_bits(&s->gb, 12);
2102  if (width == 0 || height == 0) {
2103  av_log(avctx, AV_LOG_WARNING,
2104  "Invalid horizontal or vertical size value.\n");
2106  return AVERROR_INVALIDDATA;
2107  }
2108  s->aspect_ratio_info = get_bits(&s->gb, 4);
2109  if (s->aspect_ratio_info == 0) {
2110  av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2112  return AVERROR_INVALIDDATA;
2113  }
2114  s->frame_rate_index = get_bits(&s->gb, 4);
2115  if (s->frame_rate_index == 0 || s->frame_rate_index > 13) {
2116  av_log(avctx, AV_LOG_WARNING,
2117  "frame_rate_index %d is invalid\n", s->frame_rate_index);
2118  s->frame_rate_index = 1;
2119  }
2120  s->bit_rate = get_bits(&s->gb, 18) * 400LL;
2121  if (check_marker(s->avctx, &s->gb, "in sequence header") == 0) {
2122  return AVERROR_INVALIDDATA;
2123  }
2124 
2125  s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2126  skip_bits(&s->gb, 1);
2127 
2128  /* get matrix */
2129  if (get_bits1(&s->gb)) {
2131  } else {
2132  for (i = 0; i < 64; i++) {
2133  j = s->idsp.idct_permutation[i];
2135  s->intra_matrix[j] = v;
2136  s->chroma_intra_matrix[j] = v;
2137  }
2138  }
2139  if (get_bits1(&s->gb)) {
2141  } else {
2142  for (i = 0; i < 64; i++) {
2143  int j = s->idsp.idct_permutation[i];
2145  s->inter_matrix[j] = v;
2146  s->chroma_inter_matrix[j] = v;
2147  }
2148  }
2149 
2150  if (show_bits(&s->gb, 23) != 0) {
2151  av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2152  return AVERROR_INVALIDDATA;
2153  }
2154 
2155  s->width = width;
2156  s->height = height;
2157 
2158  /* We set MPEG-2 parameters so that it emulates MPEG-1. */
2159  s->progressive_sequence = 1;
2160  s->progressive_frame = 1;
2162  s->first_field = 0;
2163  s->frame_pred_frame_dct = 1;
2164  s->chroma_format = 1;
2165  s->codec_id =
2167  s->out_format = FMT_MPEG1;
2168  s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2170  s->low_delay = 1;
2171 
2172  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2173  av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%"PRId64", aspect_ratio_info: %d \n",
2175 
2176  return 0;
2177 }
2178 
2180 {
2181  Mpeg1Context *s1 = avctx->priv_data;
2182  MpegEncContext *s = &s1->mpeg_enc_ctx;
2183  int i, v, ret;
2184 
2185  /* start new MPEG-1 context decoding */
2186  s->out_format = FMT_MPEG1;
2187  if (s1->mpeg_enc_ctx_allocated) {
2188  ff_mpv_common_end(s);
2189  s1->mpeg_enc_ctx_allocated = 0;
2190  }
2191  s->width = avctx->coded_width;
2192  s->height = avctx->coded_height;
2193  avctx->has_b_frames = 0; // true?
2194  s->low_delay = 1;
2195 
2196  avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2197  setup_hwaccel_for_pixfmt(avctx);
2198 
2199  ff_mpv_idct_init(s);
2200  if ((ret = ff_mpv_common_init(s)) < 0)
2201  return ret;
2202  s1->mpeg_enc_ctx_allocated = 1;
2203 
2204  for (i = 0; i < 64; i++) {
2205  int j = s->idsp.idct_permutation[i];
2207  s->intra_matrix[j] = v;
2208  s->chroma_intra_matrix[j] = v;
2209 
2211  s->inter_matrix[j] = v;
2212  s->chroma_inter_matrix[j] = v;
2213  }
2214 
2215  s->progressive_sequence = 1;
2216  s->progressive_frame = 1;
2218  s->first_field = 0;
2219  s->frame_pred_frame_dct = 1;
2220  s->chroma_format = 1;
2221  if (s->codec_tag == AV_RL32("BW10")) {
2223  } else {
2224  s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2226  }
2227  s1->save_width = s->width;
2228  s1->save_height = s->height;
2230  return 0;
2231 }
2232 
2234  const uint8_t *p, int buf_size)
2235 {
2236  Mpeg1Context *s1 = avctx->priv_data;
2237 
2238  if (buf_size >= 6 &&
2239  p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2240  p[4] == 3 && (p[5] & 0x40)) {
2241  /* extract A53 Part 4 CC data */
2242  int cc_count = p[5] & 0x1f;
2243  if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2244  av_freep(&s1->a53_caption);
2245  s1->a53_caption_size = cc_count * 3;
2247  if (!s1->a53_caption) {
2248  s1->a53_caption_size = 0;
2249  } else {
2250  memcpy(s1->a53_caption, p + 7, s1->a53_caption_size);
2251  }
2253  }
2254  return 1;
2255  } else if (buf_size >= 2 &&
2256  p[0] == 0x03 && (p[1]&0x7f) == 0x01) {
2257  /* extract SCTE-20 CC data */
2258  GetBitContext gb;
2259  int cc_count = 0;
2260  int i;
2261 
2262  init_get_bits(&gb, p + 2, buf_size - 2);
2263  cc_count = get_bits(&gb, 5);
2264  if (cc_count > 0) {
2265  av_freep(&s1->a53_caption);
2266  s1->a53_caption_size = cc_count * 3;
2268  if (!s1->a53_caption) {
2269  s1->a53_caption_size = 0;
2270  } else {
2271  uint8_t field, cc1, cc2;
2272  uint8_t *cap = s1->a53_caption;
2273  for (i = 0; i < cc_count && get_bits_left(&gb) >= 26; i++) {
2274  skip_bits(&gb, 2); // priority
2275  field = get_bits(&gb, 2);
2276  skip_bits(&gb, 5); // line_offset
2277  cc1 = get_bits(&gb, 8);
2278  cc2 = get_bits(&gb, 8);
2279  skip_bits(&gb, 1); // marker
2280 
2281  if (!field) { // forbidden
2282  cap[0] = cap[1] = cap[2] = 0x00;
2283  } else {
2284  field = (field == 2 ? 1 : 0);
2285  if (!s1->mpeg_enc_ctx.top_field_first) field = !field;
2286  cap[0] = 0x04 | field;
2287  cap[1] = ff_reverse[cc1];
2288  cap[2] = ff_reverse[cc2];
2289  }
2290  cap += 3;
2291  }
2292  }
2294  }
2295  return 1;
2296  } else if (buf_size >= 11 &&
2297  p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2298  /* extract DVD CC data
2299  *
2300  * uint32_t user_data_start_code 0x000001B2 (big endian)
2301  * uint16_t user_identifier 0x4343 "CC"
2302  * uint8_t user_data_type_code 0x01
2303  * uint8_t caption_block_size 0xF8
2304  * uint8_t
2305  * bit 7 caption_odd_field_first 1=odd field (CC1/CC2) first 0=even field (CC3/CC4) first
2306  * bit 6 caption_filler 0
2307  * bit 5:1 caption_block_count number of caption blocks (pairs of caption words = frames). Most DVDs use 15 per start of GOP.
2308  * bit 0 caption_extra_field_added 1=one additional caption word
2309  *
2310  * struct caption_field_block {
2311  * uint8_t
2312  * bit 7:1 caption_filler 0x7F (all 1s)
2313  * bit 0 caption_field_odd 1=odd field (this is CC1/CC2) 0=even field (this is CC3/CC4)
2314  * uint8_t caption_first_byte
2315  * uint8_t caption_second_byte
2316  * } caption_block[(caption_block_count * 2) + caption_extra_field_added];
2317  *
2318  * Some DVDs encode caption data for both fields with caption_field_odd=1. The only way to decode the fields
2319  * correctly is to start on the field indicated by caption_odd_field_first and count between odd/even fields.
2320  * Don't assume that the first caption word is the odd field. There do exist MPEG files in the wild that start
2321  * on the even field. There also exist DVDs in the wild that encode an odd field count and the
2322  * caption_extra_field_added/caption_odd_field_first bits change per packet to allow that. */
2323  int cc_count = 0;
2324  int i;
2325  // There is a caption count field in the data, but it is often
2326  // incorrect. So count the number of captions present.
2327  for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2328  cc_count++;
2329  // Transform the DVD format into A53 Part 4 format
2330  if (cc_count > 0) {
2331  av_freep(&s1->a53_caption);
2332  s1->a53_caption_size = cc_count * 6;
2334  if (!s1->a53_caption) {
2335  s1->a53_caption_size = 0;
2336  } else {
2337  uint8_t field1 = !!(p[4] & 0x80);
2338  uint8_t *cap = s1->a53_caption;
2339  p += 5;
2340  for (i = 0; i < cc_count; i++) {
2341  cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2342  cap[1] = p[1];
2343  cap[2] = p[2];
2344  cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2345  cap[4] = p[4];
2346  cap[5] = p[5];
2347  cap += 6;
2348  p += 6;
2349  }
2350  }
2352  }
2353  return 1;
2354  }
2355  return 0;
2356 }
2357 
2359  const uint8_t *p, int buf_size)
2360 {
2361  Mpeg1Context *s = avctx->priv_data;
2362  const uint8_t *buf_end = p + buf_size;
2363  Mpeg1Context *s1 = avctx->priv_data;
2364 
2365 #if 0
2366  int i;
2367  for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2368  av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2369  }
2370  av_log(avctx, AV_LOG_ERROR, "\n");
2371 #endif
2372 
2373  if (buf_size > 29){
2374  int i;
2375  for(i=0; i<20; i++)
2376  if (!memcmp(p+i, "\0TMPGEXS\0", 9)){
2377  s->tmpgexs= 1;
2378  }
2379  }
2380  /* we parse the DTG active format information */
2381  if (buf_end - p >= 5 &&
2382  p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2383  int flags = p[4];
2384  p += 5;
2385  if (flags & 0x80) {
2386  /* skip event id */
2387  p += 2;
2388  }
2389  if (flags & 0x40) {
2390  if (buf_end - p < 1)
2391  return;
2392  s1->has_afd = 1;
2393  s1->afd = p[0] & 0x0f;
2394  }
2395  } else if (buf_end - p >= 6 &&
2396  p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2397  p[4] == 0x03) { // S3D_video_format_length
2398  // the 0x7F mask ignores the reserved_bit value
2399  const uint8_t S3D_video_format_type = p[5] & 0x7F;
2400 
2401  if (S3D_video_format_type == 0x03 ||
2402  S3D_video_format_type == 0x04 ||
2403  S3D_video_format_type == 0x08 ||
2404  S3D_video_format_type == 0x23) {
2405 
2406  s1->has_stereo3d = 1;
2407 
2408  switch (S3D_video_format_type) {
2409  case 0x03:
2411  break;
2412  case 0x04:
2414  break;
2415  case 0x08:
2417  break;
2418  case 0x23:
2420  break;
2421  }
2422  }
2423  } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2424  return;
2425  }
2426 }
2427 
2428 static void mpeg_decode_gop(AVCodecContext *avctx,
2429  const uint8_t *buf, int buf_size)
2430 {
2431  Mpeg1Context *s1 = avctx->priv_data;
2432  MpegEncContext *s = &s1->mpeg_enc_ctx;
2433  int broken_link;
2434  int64_t tc;
2435 
2436  init_get_bits(&s->gb, buf, buf_size * 8);
2437 
2438  tc = s-> timecode_frame_start = get_bits(&s->gb, 25);
2439 
2440 #if FF_API_PRIVATE_OPT
2442  avctx->timecode_frame_start = tc;
2444 #endif
2445 
2446  s->closed_gop = get_bits1(&s->gb);
2447  /* broken_link indicates that after editing the
2448  * reference frames of the first B-Frames after GOP I-Frame
2449  * are missing (open gop) */
2450  broken_link = get_bits1(&s->gb);
2451 
2452  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2453  char tcbuf[AV_TIMECODE_STR_SIZE];
2456  "GOP (%s) closed_gop=%d broken_link=%d\n",
2457  tcbuf, s->closed_gop, broken_link);
2458  }
2459 }
2460 
2461 static int decode_chunks(AVCodecContext *avctx, AVFrame *picture,
2462  int *got_output, const uint8_t *buf, int buf_size)
2463 {
2464  Mpeg1Context *s = avctx->priv_data;
2466  const uint8_t *buf_ptr = buf;
2467  const uint8_t *buf_end = buf + buf_size;
2468  int ret, input_size;
2469  int last_code = 0, skip_frame = 0;
2470  int picture_start_code_seen = 0;
2471 
2472  for (;;) {
2473  /* find next start code */
2474  uint32_t start_code = -1;
2475  buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2476  if (start_code > 0x1ff) {
2477  if (!skip_frame) {
2478  if (HAVE_THREADS &&
2479  (avctx->active_thread_type & FF_THREAD_SLICE) &&
2480  !avctx->hwaccel) {
2481  int i;
2482  av_assert0(avctx->thread_count > 1);
2483 
2484  avctx->execute(avctx, slice_decode_thread,
2485  &s2->thread_context[0], NULL,
2486  s->slice_count, sizeof(void *));
2487  for (i = 0; i < s->slice_count; i++)
2488  s2->er.error_count += s2->thread_context[i]->er.error_count;
2489  }
2490 
2491  ret = slice_end(avctx, picture);
2492  if (ret < 0)
2493  return ret;
2494  else if (ret) {
2495  // FIXME: merge with the stuff in mpeg_decode_slice
2496  if (s2->last_picture_ptr || s2->low_delay)
2497  *got_output = 1;
2498  }
2499  }
2500  s2->pict_type = 0;
2501 
2502  if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2503  return AVERROR_INVALIDDATA;
2504 
2505  return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2506  }
2507 
2508  input_size = buf_end - buf_ptr;
2509 
2510  if (avctx->debug & FF_DEBUG_STARTCODE)
2511  av_log(avctx, AV_LOG_DEBUG, "%3"PRIX32" at %"PTRDIFF_SPECIFIER" left %d\n",
2512  start_code, buf_ptr - buf, input_size);
2513 
2514  /* prepare data for next start code */
2515  switch (start_code) {
2516  case SEQ_START_CODE:
2517  if (last_code == 0) {
2518  mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2519  if (buf != avctx->extradata)
2520  s->sync = 1;
2521  } else {
2522  av_log(avctx, AV_LOG_ERROR,
2523  "ignoring SEQ_START_CODE after %X\n", last_code);
2524  if (avctx->err_recognition & AV_EF_EXPLODE)
2525  return AVERROR_INVALIDDATA;
2526  }
2527  break;
2528 
2529  case PICTURE_START_CODE:
2530  if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2531  /* If it's a frame picture, there can't be more than one picture header.
2532  Yet, it does happen and we need to handle it. */
2533  av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2534  break;
2535  }
2536  picture_start_code_seen = 1;
2537 
2538  if (s2->width <= 0 || s2->height <= 0) {
2539  av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2540  s2->width, s2->height);
2541  return AVERROR_INVALIDDATA;
2542  }
2543 
2544  if (s->tmpgexs){
2545  s2->intra_dc_precision= 3;
2546  s2->intra_matrix[0]= 1;
2547  }
2548  if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2549  !avctx->hwaccel && s->slice_count) {
2550  int i;
2551 
2552  avctx->execute(avctx, slice_decode_thread,
2553  s2->thread_context, NULL,
2554  s->slice_count, sizeof(void *));
2555  for (i = 0; i < s->slice_count; i++)
2556  s2->er.error_count += s2->thread_context[i]->er.error_count;
2557  s->slice_count = 0;
2558  }
2559  if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2560  ret = mpeg_decode_postinit(avctx);
2561  if (ret < 0) {
2562  av_log(avctx, AV_LOG_ERROR,
2563  "mpeg_decode_postinit() failure\n");
2564  return ret;
2565  }
2566 
2567  /* We have a complete image: we try to decompress it. */
2568  if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2569  s2->pict_type = 0;
2570  s->first_slice = 1;
2571  last_code = PICTURE_START_CODE;
2572  } else {
2573  av_log(avctx, AV_LOG_ERROR,
2574  "ignoring pic after %X\n", last_code);
2575  if (avctx->err_recognition & AV_EF_EXPLODE)
2576  return AVERROR_INVALIDDATA;
2577  }
2578  break;
2579  case EXT_START_CODE:
2580  init_get_bits(&s2->gb, buf_ptr, input_size * 8);
2581 
2582  switch (get_bits(&s2->gb, 4)) {
2583  case 0x1:
2584  if (last_code == 0) {
2586  } else {
2587  av_log(avctx, AV_LOG_ERROR,
2588  "ignoring seq ext after %X\n", last_code);
2589  if (avctx->err_recognition & AV_EF_EXPLODE)
2590  return AVERROR_INVALIDDATA;
2591  }
2592  break;
2593  case 0x2:
2595  break;
2596  case 0x3:
2598  break;
2599  case 0x7:
2601  break;
2602  case 0x8:
2603  if (last_code == PICTURE_START_CODE) {
2605  } else {
2606  av_log(avctx, AV_LOG_ERROR,
2607  "ignoring pic cod ext after %X\n", last_code);
2608  if (avctx->err_recognition & AV_EF_EXPLODE)
2609  return AVERROR_INVALIDDATA;
2610  }
2611  break;
2612  }
2613  break;
2614  case USER_START_CODE:
2615  mpeg_decode_user_data(avctx, buf_ptr, input_size);
2616  break;
2617  case GOP_START_CODE:
2618  if (last_code == 0) {
2619  s2->first_field = 0;
2620  mpeg_decode_gop(avctx, buf_ptr, input_size);
2621  s->sync = 1;
2622  } else {
2623  av_log(avctx, AV_LOG_ERROR,
2624  "ignoring GOP_START_CODE after %X\n", last_code);
2625  if (avctx->err_recognition & AV_EF_EXPLODE)
2626  return AVERROR_INVALIDDATA;
2627  }
2628  break;
2629  default:
2630  if (start_code >= SLICE_MIN_START_CODE &&
2631  start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2632  if (s2->progressive_sequence && !s2->progressive_frame) {
2633  s2->progressive_frame = 1;
2634  av_log(s2->avctx, AV_LOG_ERROR,
2635  "interlaced frame in progressive sequence, ignoring\n");
2636  }
2637 
2638  if (s2->picture_structure == 0 ||
2640  av_log(s2->avctx, AV_LOG_ERROR,
2641  "picture_structure %d invalid, ignoring\n",
2642  s2->picture_structure);
2644  }
2645 
2647  av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2648 
2649  if (s2->picture_structure == PICT_FRAME) {
2650  s2->first_field = 0;
2651  s2->v_edge_pos = 16 * s2->mb_height;
2652  } else {
2653  s2->first_field ^= 1;
2654  s2->v_edge_pos = 8 * s2->mb_height;
2655  memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2656  }
2657  }
2658  if (start_code >= SLICE_MIN_START_CODE &&
2659  start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2660  const int field_pic = s2->picture_structure != PICT_FRAME;
2661  int mb_y = start_code - SLICE_MIN_START_CODE;
2662  last_code = SLICE_MIN_START_CODE;
2663  if (s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2664  mb_y += (*buf_ptr&0xE0)<<2;
2665 
2666  mb_y <<= field_pic;
2668  mb_y++;
2669 
2670  if (buf_end - buf_ptr < 2) {
2671  av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2672  return AVERROR_INVALIDDATA;
2673  }
2674 
2675  if (mb_y >= s2->mb_height) {
2676  av_log(s2->avctx, AV_LOG_ERROR,
2677  "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2678  return AVERROR_INVALIDDATA;
2679  }
2680 
2681  if (!s2->last_picture_ptr) {
2682  /* Skip B-frames if we do not have reference frames and
2683  * GOP is not closed. */
2684  if (s2->pict_type == AV_PICTURE_TYPE_B) {
2685  if (!s2->closed_gop) {
2686  skip_frame = 1;
2687  av_log(s2->avctx, AV_LOG_DEBUG,
2688  "Skipping B slice due to open GOP\n");
2689  break;
2690  }
2691  }
2692  }
2694  s->sync = 1;
2695  if (!s2->next_picture_ptr) {
2696  /* Skip P-frames if we do not have a reference frame or
2697  * we have an invalid header. */
2698  if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2699  skip_frame = 1;
2700  av_log(s2->avctx, AV_LOG_DEBUG,
2701  "Skipping P slice due to !sync\n");
2702  break;
2703  }
2704  }
2705  if ((avctx->skip_frame >= AVDISCARD_NONREF &&
2706  s2->pict_type == AV_PICTURE_TYPE_B) ||
2707  (avctx->skip_frame >= AVDISCARD_NONKEY &&
2708  s2->pict_type != AV_PICTURE_TYPE_I) ||
2709  avctx->skip_frame >= AVDISCARD_ALL) {
2710  skip_frame = 1;
2711  break;
2712  }
2713 
2714  if (!s->mpeg_enc_ctx_allocated)
2715  break;
2716 
2717  if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2718  if (mb_y < avctx->skip_top ||
2719  mb_y >= s2->mb_height - avctx->skip_bottom)
2720  break;
2721  }
2722 
2723  if (!s2->pict_type) {
2724  av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2725  if (avctx->err_recognition & AV_EF_EXPLODE)
2726  return AVERROR_INVALIDDATA;
2727  break;
2728  }
2729 
2730  if (s->first_slice) {
2731  skip_frame = 0;
2732  s->first_slice = 0;
2733  if ((ret = mpeg_field_start(s2, buf, buf_size)) < 0)
2734  return ret;
2735  }
2736  if (!s2->current_picture_ptr) {
2737  av_log(avctx, AV_LOG_ERROR,
2738  "current_picture not initialized\n");
2739  return AVERROR_INVALIDDATA;
2740  }
2741 
2742  if (HAVE_THREADS &&
2743  (avctx->active_thread_type & FF_THREAD_SLICE) &&
2744  !avctx->hwaccel) {
2745  int threshold = (s2->mb_height * s->slice_count +
2746  s2->slice_context_count / 2) /
2747  s2->slice_context_count;
2748  av_assert0(avctx->thread_count > 1);
2749  if (threshold <= mb_y) {
2750  MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2751 
2752  thread_context->start_mb_y = mb_y;
2753  thread_context->end_mb_y = s2->mb_height;
2754  if (s->slice_count) {
2755  s2->thread_context[s->slice_count - 1]->end_mb_y = mb_y;
2756  ret = ff_update_duplicate_context(thread_context, s2);
2757  if (ret < 0)
2758  return ret;
2759  }
2760  init_get_bits(&thread_context->gb, buf_ptr, input_size * 8);
2761  s->slice_count++;
2762  }
2763  buf_ptr += 2; // FIXME add minimum number of bytes per slice
2764  } else {
2765  ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2766  emms_c();
2767 
2768  if (ret < 0) {
2769  if (avctx->err_recognition & AV_EF_EXPLODE)
2770  return ret;
2771  if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2772  ff_er_add_slice(&s2->er, s2->resync_mb_x,
2773  s2->resync_mb_y, s2->mb_x, s2->mb_y,
2775  } else {
2776  ff_er_add_slice(&s2->er, s2->resync_mb_x,
2777  s2->resync_mb_y, s2->mb_x - 1, s2->mb_y,
2779  }
2780  }
2781  }
2782  break;
2783  }
2784  }
2785 }
2786 
2787 static int mpeg_decode_frame(AVCodecContext *avctx, void *data,
2788  int *got_output, AVPacket *avpkt)
2789 {
2790  const uint8_t *buf = avpkt->data;
2791  int ret;
2792  int buf_size = avpkt->size;
2793  Mpeg1Context *s = avctx->priv_data;
2794  AVFrame *picture = data;
2796 
2797  if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2798  /* special case for last picture */
2799  if (s2->low_delay == 0 && s2->next_picture_ptr) {
2800  int ret = av_frame_ref(picture, s2->next_picture_ptr->f);
2801  if (ret < 0)
2802  return ret;
2803 
2804  s2->next_picture_ptr = NULL;
2805 
2806  *got_output = 1;
2807  }
2808  return buf_size;
2809  }
2810 
2811  if (s2->avctx->flags & AV_CODEC_FLAG_TRUNCATED) {
2812  int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf,
2813  buf_size, NULL);
2814 
2815  if (ff_combine_frame(&s2->parse_context, next,
2816  (const uint8_t **) &buf, &buf_size) < 0)
2817  return buf_size;
2818  }
2819 
2820  s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2821  if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2822  || s2->codec_tag == AV_RL32("BW10")
2823  ))
2824  vcr2_init_sequence(avctx);
2825 
2826  s->slice_count = 0;
2827 
2828  if (avctx->extradata && !s->extradata_decoded) {
2829  ret = decode_chunks(avctx, picture, got_output,
2830  avctx->extradata, avctx->extradata_size);
2831  if (*got_output) {
2832  av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2833  av_frame_unref(picture);
2834  *got_output = 0;
2835  }
2836  s->extradata_decoded = 1;
2837  if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2838  s2->current_picture_ptr = NULL;
2839  return ret;
2840  }
2841  }
2842 
2843  ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2844  if (ret<0 || *got_output) {
2845  s2->current_picture_ptr = NULL;
2846 
2847  if (s2->timecode_frame_start != -1 && *got_output) {
2848  AVFrameSideData *tcside = av_frame_new_side_data(picture,
2850  sizeof(int64_t));
2851  if (!tcside)
2852  return AVERROR(ENOMEM);
2853  memcpy(tcside->data, &s2->timecode_frame_start, sizeof(int64_t));
2854 
2855  s2->timecode_frame_start = -1;
2856  }
2857  }
2858 
2859  return ret;
2860 }
2861 
2862 static void flush(AVCodecContext *avctx)
2863 {
2864  Mpeg1Context *s = avctx->priv_data;
2865 
2866  s->sync = 0;
2867 
2868  ff_mpeg_flush(avctx);
2869 }
2870 
2872 {
2873  Mpeg1Context *s = avctx->priv_data;
2874 
2875  if (s->mpeg_enc_ctx_allocated)
2877  av_freep(&s->a53_caption);
2878  return 0;
2879 }
2880 
2882  .name = "mpeg1video",
2883  .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2884  .type = AVMEDIA_TYPE_VIDEO,
2885  .id = AV_CODEC_ID_MPEG1VIDEO,
2886  .priv_data_size = sizeof(Mpeg1Context),
2888  .close = mpeg_decode_end,
2893  .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2894  .flush = flush,
2895  .max_lowres = 3,
2896  .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context),
2897  .hw_configs = (const AVCodecHWConfigInternal*[]) {
2898 #if CONFIG_MPEG1_NVDEC_HWACCEL
2899  HWACCEL_NVDEC(mpeg1),
2900 #endif
2901 #if CONFIG_MPEG1_VDPAU_HWACCEL
2902  HWACCEL_VDPAU(mpeg1),
2903 #endif
2904 #if CONFIG_MPEG1_VIDEOTOOLBOX_HWACCEL
2905  HWACCEL_VIDEOTOOLBOX(mpeg1),
2906 #endif
2907 #if CONFIG_MPEG1_XVMC_HWACCEL
2908  HWACCEL_XVMC(mpeg1),
2909 #endif
2910  NULL
2911  },
2912 };
2913 
2915  .name = "mpeg2video",
2916  .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2917  .type = AVMEDIA_TYPE_VIDEO,
2918  .id = AV_CODEC_ID_MPEG2VIDEO,
2919  .priv_data_size = sizeof(Mpeg1Context),
2921  .close = mpeg_decode_end,
2926  .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2927  .flush = flush,
2928  .max_lowres = 3,
2930  .hw_configs = (const AVCodecHWConfigInternal*[]) {
2931 #if CONFIG_MPEG2_DXVA2_HWACCEL
2932  HWACCEL_DXVA2(mpeg2),
2933 #endif
2934 #if CONFIG_MPEG2_D3D11VA_HWACCEL
2935  HWACCEL_D3D11VA(mpeg2),
2936 #endif
2937 #if CONFIG_MPEG2_D3D11VA2_HWACCEL
2938  HWACCEL_D3D11VA2(mpeg2),
2939 #endif
2940 #if CONFIG_MPEG2_NVDEC_HWACCEL
2941  HWACCEL_NVDEC(mpeg2),
2942 #endif
2943 #if CONFIG_MPEG2_VAAPI_HWACCEL
2944  HWACCEL_VAAPI(mpeg2),
2945 #endif
2946 #if CONFIG_MPEG2_VDPAU_HWACCEL
2947  HWACCEL_VDPAU(mpeg2),
2948 #endif
2949 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
2950  HWACCEL_VIDEOTOOLBOX(mpeg2),
2951 #endif
2952 #if CONFIG_MPEG2_XVMC_HWACCEL
2953  HWACCEL_XVMC(mpeg2),
2954 #endif
2955  NULL
2956  },
2957 };
2958 
2959 //legacy decoder
2961  .name = "mpegvideo",
2962  .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2963  .type = AVMEDIA_TYPE_VIDEO,
2964  .id = AV_CODEC_ID_MPEG2VIDEO,
2965  .priv_data_size = sizeof(Mpeg1Context),
2967  .close = mpeg_decode_end,
2970  .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2971  .flush = flush,
2972  .max_lowres = 3,
2973 };
static const uint32_t btype2mb_type[11]
Definition: mpeg12dec.c:86
const uint16_t ff_mpeg1_default_non_intra_matrix[64]
Definition: mpeg12data.c:41
static unsigned int show_bits_long(GetBitContext *s, int n)
Show 0-32 bits.
Definition: get_bits.h:397
#define AV_EF_AGGRESSIVE
consider things that a sane encoder should not do as an error
Definition: avcodec.h:2643
#define ff_tlog(ctx,...)
Definition: internal.h:75
IDCTDSPContext idsp
Definition: mpegvideo.h:227
#define NULL
Definition: coverity.c:32
const struct AVCodec * codec
Definition: avcodec.h:1512
AVRational framerate
Definition: avcodec.h:3013
const char const char void * val
Definition: avisynth_c.h:771
discard all frames except keyframes
Definition: avcodec.h:791
int8_t * ref_index[2]
Definition: mpegpicture.h:62
void ff_init_block_index(MpegEncContext *s)
Definition: mpegvideo.c:2202
int64_t timecode_frame_start
GOP timecode frame start number, in non drop frame format.
Definition: mpegvideo.h:457
int(* start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
Called at the beginning of each frame or field picture.
Definition: avcodec.h:3610
int aspect_ratio_info
Definition: mpegvideo.h:397
int picture_number
Definition: mpegvideo.h:124
const char * s
Definition: avisynth_c.h:768
#define MB_TYPE_L1
Definition: mpegutils.h:68
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define SLICE_MAX_START_CODE
Definition: cavs.h:32
#define SLICE_FLAG_ALLOW_FIELD
allow draw_horiz_band() with field slices (MPEG-2 field pics)
Definition: avcodec.h:1982
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:520
#define MAX_INDEX
Definition: mpeg12dec.c:127
This structure describes decoded (raw) audio or video data.
Definition: frame.h:201
static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm, const uint8_t *new_perm)
Definition: mpeg12dec.c:1121
#define HWACCEL_D3D11VA2(codec)
Definition: hwaccel.h:69
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
int start_mb_y
start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y) ...
Definition: mpegvideo.h:150
#define MV_TYPE_FIELD
2 vectors, one per field
Definition: mpegvideo.h:266
#define HWACCEL_NVDEC(codec)
Definition: hwaccel.h:71
int last_mv[2][2][2]
last MV, used for MV prediction in MPEG-1 & B-frame MPEG-4
Definition: mpegvideo.h:275
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:1690
float re
Definition: fft.c:82
static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
Definition: mpeg12dec.c:1449
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:67
misc image utilities
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:261
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
av_cold void ff_mpeg12_init_vlcs(void)
Definition: mpeg12.c:137
int64_t bit_rate
the average bitrate
Definition: avcodec.h:1553
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:278
int end_mb_y
end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y) ...
Definition: mpegvideo.h:151
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
uint8_t * a53_caption
Definition: mpeg12dec.c:60
uint16_t chroma_intra_matrix[64]
Definition: mpegvideo.h:298
const uint8_t ff_reverse[256]
Definition: reverse.c:23
int height
Definition: avcodec.h:1082
int v_edge_pos
horizontal / vertical position of the right/bottom edge (pixel replication)
Definition: mpegvideo.h:129
uint16_t chroma_inter_matrix[64]
Definition: mpegvideo.h:300
void ff_er_frame_end(ERContext *s)
static int mpeg2_fast_decode_block_non_intra(MpegEncContext *s, int16_t *block, int n)
Note: this function can read out of range and crash for corrupt streams.
Definition: mpeg12dec.c:403
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: avcodec.h:2133
static int check_marker(void *logctx, GetBitContext *s, const char *msg)
Definition: get_bits.h:407
int num
Numerator.
Definition: rational.h:59
int repeat_pict
When decoding, this signals how much the picture must be delayed.
Definition: frame.h:343
Views are next to each other, but when upscaling apply a checkerboard pattern.
Definition: stereo3d.h:117
int size
Definition: avcodec.h:1416
enum AVCodecID codec_id
Definition: mpegvideo.h:109
#define AV_EF_COMPLIANT
consider all spec non compliances as errors
Definition: avcodec.h:2642
void(* clear_blocks)(int16_t *blocks)
Definition: blockdsp.h:37
static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
Definition: mpeg12dec.c:1544
const uint8_t * buffer
Definition: get_bits.h:56
void ff_mpeg1_clean_buffers(MpegEncContext *s)
Definition: mpeg12.c:115
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel...
Definition: avcodec.h:1881
#define MB_TYPE_INTRA
Definition: mpegutils.h:73
AVCodec ff_mpeg1video_decoder
Definition: mpeg12dec.c:2881
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:1712
#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:1065
#define AV_EF_BITSTREAM
detect bitstream specification deviations
Definition: avcodec.h:2636
mpegvideo header.
#define HAS_CBP(a)
Definition: mpegutils.h:101
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
discard all
Definition: avcodec.h:792
uint8_t permutated[64]
Definition: idctdsp.h:33
Views are next to each other.
Definition: stereo3d.h:67
uint8_t run
Definition: svq3.c:206
#define HWACCEL_D3D11VA(codec)
Definition: hwaccel.h:79
#define ER_MV_ERROR
static void mpeg_decode_gop(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
Definition: mpeg12dec.c:2428
#define SLICE_MIN_START_CODE
Definition: mpegvideo.h:70
const struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:2659
int profile
profile
Definition: avcodec.h:2828
AVCodec.
Definition: avcodec.h:3380
static int get_dmv(MpegEncContext *s)
Definition: mpeg12dec.c:644
int qscale
QP.
Definition: mpegvideo.h:201
RLTable.
Definition: rl.h:39
static int get_sbits(GetBitContext *s, int n)
Definition: get_bits.h:246
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:42
int chroma_x_shift
Definition: mpegvideo.h:480
int encoding
true if we are encoding (vs decoding)
Definition: mpegvideo.h:111
int field_select[2][2]
Definition: mpegvideo.h:274
Macro definitions for various function/variable attributes.
enum AVDiscard skip_frame
Skip decoding for selected frames.
Definition: avcodec.h:2948
const uint8_t ff_mpeg2_non_linear_qscale[32]
Definition: mpegvideodata.c:27
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: avcodec.h:982
#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:2195
#define MBINCR_VLC_BITS
Definition: mpeg12vlc.h:37
static const uint32_t ptype2mb_type[7]
Definition: mpeg12dec.c:76
uint8_t
#define av_cold
Definition: attributes.h:82
#define av_malloc(s)
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:64
RLTable ff_rl_mpeg2
Definition: mpeg12data.c:174
Stereo 3D type: this structure describes how two videos are packed within a single video surface...
Definition: stereo3d.h:176
enum OutputFormat out_format
output format
Definition: mpegvideo.h:101
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:2584
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:876
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:400
static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra)
Definition: mpeg12dec.c:1507
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1603
int full_pel[2]
Definition: mpegvideo.h:484
int interlaced_dct
Definition: mpegvideo.h:485
#define MB_TYPE_16x16
Definition: mpegutils.h:54
static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
Definition: mpeg12dec.c:1184
static int mpeg1_fast_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
Note: this function can read out of range and crash for corrupt streams.
Definition: mpeg12dec.c:227
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
Picture current_picture
copy of the current picture structure.
Definition: mpegvideo.h:177
int first_slice
Definition: mpeg12dec.c:70
The data is the AVPanScan struct defined in libavcodec.
Definition: frame.h:52
int intra_dc_precision
Definition: mpegvideo.h:458
int repeat_first_field
Definition: mpegvideo.h:474
void ff_xvmc_init_block(MpegEncContext *s)
Initialize the block field of the MpegEncContext pointer passed as parameter after making sure that t...
Structure to hold side data for an AVFrame.
Definition: frame.h:163
int av_image_check_sar(unsigned int w, unsigned int h, AVRational sar)
Check if the given sample aspect ratio of an image is valid.
Definition: imgutils.c:287
#define PICT_BOTTOM_FIELD
Definition: mpegutils.h:38
#define height
uint8_t * data
Definition: avcodec.h:1415
#define HWACCEL_DXVA2(codec)
Definition: hwaccel.h:67
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:199
static int flags
Definition: log.c:55
void ff_xvmc_pack_pblocks(MpegEncContext *s, int cbp)
Fill individual block pointers, so there are no gaps in the data_block array in case not all blocks i...
#define ER_MV_END
#define ff_dlog(a,...)
av_cold void ff_mpv_idct_init(MpegEncContext *s)
Definition: mpegvideo.c:330
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:126
int lowres
low resolution decoding, 1-> 1/2 size, 2->1/4 size
Definition: avcodec.h:2734
Video is not stereoscopic (and metadata has to be there).
Definition: stereo3d.h:55
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
Definition: rational.c:35
int codec_tag
internal codec_tag upper case converted from avctx codec_tag
Definition: mpegvideo.h:117
void ff_thread_finish_setup(AVCodecContext *avctx)
If the codec defines update_thread_context(), call this when they are ready for the next thread to st...
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:859
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:2140
#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:2699
#define MB_TYPE_QUANT
Definition: mpegutils.h:70
static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
Definition: mpeg12dec.c:1205
Libavcodec version macros.
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:588
enum AVCodecID id
Definition: avcodec.h:3394
int slice_context_count
number of used thread_contexts
Definition: mpegvideo.h:153
int extradata_decoded
Definition: mpeg12dec.c:71
#define UPDATE_CACHE(name, gb)
Definition: get_bits.h:160
#define FF_IDCT_NONE
Definition: avcodec.h:2711
#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:1792
int last_dc[3]
last DC values for MPEG-1
Definition: mpegvideo.h:182
#define s2
Definition: regdef.h:39
void ff_er_add_slice(ERContext *s, int startx, int starty, int endx, int endy, int status)
Add a slice.
#define MT_FIELD
Definition: mpeg12dec.c:663
#define PTRDIFF_SPECIFIER
Definition: internal.h:261
int mb_skipped
MUST BE SET only during DECODING.
Definition: mpegvideo.h:192
int chroma_y_shift
Definition: mpegvideo.h:481
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:318
#define AVERROR(e)
Definition: error.h:43
static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
Definition: mpeg12dec.c:1406
#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:555
static int mpeg1_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
Definition: mpeg12dec.c:137
int active_thread_type
Which multithreading methods are in use by the codec.
Definition: avcodec.h:2773
AVCodec ff_mpegvideo_decoder
Definition: mpeg12dec.c:2960
#define MB_TYPE_CBP
Definition: mpegutils.h:71
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
ATSC A53 Part 4 Closed Captions.
Definition: frame.h:58
static int get_qscale(MpegEncContext *s)
Definition: mpeg12dec.c:652
const char * arg
Definition: jacosubdec.c:66
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1583
#define wrap(func)
Definition: neontest.h:65
uint16_t width
Definition: gdv.c:47
#define SEQ_END_CODE
Definition: mpegvideo.h:66
#define PICT_TOP_FIELD
Definition: mpegutils.h:37
const char * name
Name of the codec implementation.
Definition: avcodec.h:3387
static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
Definition: mpeg12dec.c:101
int width
width and height in 1/16 pel
Definition: avcodec.h:1081
int low_delay
no reordering needed / has no B-frames
Definition: mpegvideo.h:401
static void mpeg_decode_user_data(AVCodecContext *avctx, const uint8_t *p, int buf_size)
Definition: mpeg12dec.c:2358
GetBitContext gb
Definition: mpegvideo.h:443
The GOP timecode in 25 bit timecode format.
Definition: frame.h:124
#define CLOSE_READER(name, gb)
Definition: get_bits.h:131
void ff_mpv_common_end(MpegEncContext *s)
Definition: mpegvideo.c:1116
VLC ff_mb_pat_vlc
Definition: mpeg12.c:135
#define FFMAX(a, b)
Definition: common.h:94
static int decode_dc(GetBitContext *gb, int component)
Definition: mpeg12.h:41
int repeat_field
Definition: mpeg12dec.c:56
attribute_deprecated int64_t timecode_frame_start
Definition: avcodec.h:2460
#define DECODE_SLICE_ERROR
Definition: mpeg12dec.c:1702
#define GET_RL_VLC(level, run, name, gb, table, bits,max_depth, need_update)
Definition: get_bits.h:509
#define DECODE_SLICE_OK
Definition: mpeg12dec.c:1703
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:66
void ff_mpeg_flush(AVCodecContext *avctx)
Definition: mpegvideo.c:2234
XVideo Motion Acceleration via common packet passing.
Definition: pixfmt.h:269
#define SKIP_BITS(name, gb, num)
Definition: get_bits.h:175
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:225
int resync_mb_x
x position of last resync marker
Definition: mpegvideo.h:353
int rc_buffer_size
decoder bitstream buffer size
Definition: avcodec.h:2361
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:1603
int intra_vlc_format
Definition: mpegvideo.h:464
const AVProfile ff_mpeg2_video_profiles[]
Definition: profiles.c:95
#define AV_CODEC_CAP_DRAW_HORIZ_BAND
Decoder can use draw_horiz_band callback.
Definition: avcodec.h:951
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:1429
int progressive_frame
Definition: mpegvideo.h:483
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:284
#define MB_PAT_VLC_BITS
Definition: mpeg12vlc.h:38
int top_field_first
Definition: mpegvideo.h:460
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:2627
#define FF_THREAD_FRAME
Decode more than one frame at once.
Definition: avcodec.h:2765
#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:2179
uint8_t * mbskip_table
used to avoid copy if macroblock skipped (for black regions for example) and used for B-frame encodin...
Definition: mpegvideo.h:193
int idct_algo
IDCT algorithm, see FF_IDCT_* below.
Definition: avcodec.h:2698
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:181
void ff_mpeg_er_frame_start(MpegEncContext *s)
Definition: mpeg_er.c:46
#define ER_DC_END
static int mpeg_decode_a53_cc(AVCodecContext *avctx, const uint8_t *p, int buf_size)
Definition: mpeg12dec.c:2233
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:522
int alternate_scan
Definition: mpegvideo.h:465
int save_height
Definition: mpeg12dec.c:66
#define MB_BTYPE_VLC_BITS
Definition: mpeg12vlc.h:40
#define GOP_START_CODE
Definition: mpegvideo.h:68
int32_t
AVFormatContext * ctx
Definition: movenc.c:48
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:2112
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:296
int a53_caption_size
Definition: mpeg12dec.c:61
#define FF_THREAD_SLICE
Decode more than one part of a single frame at once.
Definition: avcodec.h:2766
int level
level
Definition: avcodec.h:2926
#define LAST_SKIP_BITS(name, gb, num)
Definition: get_bits.h:181
static av_cold int mpeg_decode_end(AVCodecContext *avctx)
Definition: mpeg12dec.c:2871
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:555
static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
Definition: mpeg12dec.c:1530
int16_t(*[12] pblocks)[64]
Definition: mpegvideo.h:500
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:83
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2638
int n
Definition: avisynth_c.h:684
uint8_t idct_permutation[64]
IDCT input permutation.
Definition: idctdsp.h:96
int ticks_per_frame
For some codecs, the time base is closer to the field rate than the frame rate.
Definition: avcodec.h:1634
int mpeg_f_code[2][2]
Definition: mpegvideo.h:452
#define EXT_START_CODE
Definition: cavs.h:33
int mpeg_enc_ctx_allocated
Definition: mpeg12dec.c:55
#define check_scantable_index(ctx, x)
Definition: mpeg12dec.c:128
#define MB_TYPE_INTERLACED
Definition: mpegutils.h:58
HW acceleration through CUDA.
Definition: pixfmt.h:231
int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
Definition: mpegvideo.c:483
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:220
RL_VLC_ELEM * rl_vlc[32]
decoding only
Definition: rl.h:48
#define SHOW_UBITS(name, gb, num)
Definition: get_bits.h:193
void ff_mpv_decode_defaults(MpegEncContext *s)
Set the given MpegEncContext to defaults for decoding.
Definition: mpegvideo.c:657
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:2754
static int mpeg1_decode_sequence(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
Definition: mpeg12dec.c:2090
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:486
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:1017
int save_width
Definition: mpeg12dec.c:66
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:263
#define MV_VLC_BITS
Definition: ituh263dec.c:54
int frame_pred_frame_dct
Definition: mpegvideo.h:459
static int mpeg2_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
Definition: mpeg12dec.c:475
enum AVStereo3DType type
How views are packed within the video.
Definition: stereo3d.h:180
uint16_t inter_matrix[64]
Definition: mpegvideo.h:299
uint8_t * buffer
Definition: parser.h:29
static enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[]
Definition: mpeg12dec.c:1147
int concealment_motion_vectors
Definition: mpegvideo.h:461
struct MpegEncContext * thread_context[MAX_THREADS]
Definition: mpegvideo.h:152
Libavcodec external API header.
Views are on top of each other.
Definition: stereo3d.h:79
AVRational frame_rate_ext
Definition: mpeg12dec.c:67
enum AVCodecID codec_id
Definition: avcodec.h:1513
BlockDSPContext bdsp
Definition: mpegvideo.h:223
static int mpeg2_fast_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
Note: this function can read out of range and crash for corrupt streams.
Definition: mpeg12dec.c:565
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:232
#define AV_CODEC_FLAG2_FAST
Allow non spec compliant speedup tricks.
Definition: avcodec.h:899
int debug
debug
Definition: avcodec.h:2583
#define MB_PTYPE_VLC_BITS
Definition: mpeg12vlc.h:39
main external API structure.
Definition: avcodec.h:1503
ScanTable intra_scantable
Definition: mpegvideo.h:88
#define USER_START_CODE
Definition: cavs.h:34
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:97
#define IS_QUANT(a)
Definition: mpegutils.h:95
MPEG-1/2 tables.
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1528
#define OPEN_READER(name, gb)
Definition: get_bits.h:120
uint8_t * data
Definition: frame.h:165
#define MV_TYPE_16X8
2 vectors, one per 16x8 block
Definition: mpegvideo.h:265
int chroma_420_type
Definition: mpegvideo.h:475
void * buf
Definition: avisynth_c.h:690
static int mpeg_decode_slice(MpegEncContext *s, int mb_y, const uint8_t **buf, int buf_size)
Decode a slice.
Definition: mpeg12dec.c:1711
void ff_print_debug_info(MpegEncContext *s, Picture *p, AVFrame *pict)
Definition: mpegvideo.c:1422
int extradata_size
Definition: avcodec.h:1604
int progressive_sequence
Definition: mpegvideo.h:451
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:313
static void skip_bits1(GetBitContext *s)
Definition: get_bits.h:338
int slice_flags
slice flags
Definition: avcodec.h:1980
int coded_height
Definition: avcodec.h:1690
#define FF_CODEC_PROPERTY_CLOSED_CAPTIONS
Definition: avcodec.h:3136
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:306
static const AVProfile profiles[]
AVFrameSideData * av_frame_new_side_data(AVFrame *frame, enum AVFrameSideDataType type, int size)
Add a new side data to a frame.
Definition: frame.c:680
int closed_gop
MPEG1/2 GOP is closed.
Definition: mpegvideo.h:208
int has_stereo3d
Definition: mpeg12dec.c:59
VLC ff_mb_ptype_vlc
Definition: mpeg12.c:133
unsigned int avpriv_toupper4(unsigned int x)
Definition: utils.c:1773
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:2126
Rational number (pair of numerator and denominator).
Definition: rational.h:58
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:2119
struct AVFrame * f
Definition: mpegpicture.h:46
#define HWACCEL_XVMC(codec)
Definition: hwaccel.h:81
HW acceleration through VDPAU, Picture.data[3] contains a VdpVideoSurface.
Definition: pixfmt.h:193
static enum AVPixelFormat mpeg12_pixfmt_list_422[]
Definition: mpeg12dec.c:1174
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:425
#define GET_CACHE(name, gb)
Definition: get_bits.h:197
const uint16_t ff_mpeg1_default_intra_matrix[256]
Definition: mpeg12data.c:30
int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s)
Find the end of the current frame in the bitstream.
Definition: mpeg12.c:178
int save_progressive_seq
Definition: mpeg12dec.c:66
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:98
#define MT_DMV
Definition: mpeg12dec.c:666
enum AVPixelFormat ff_thread_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
Wrapper around get_format() for frame-multithreaded codecs.
#define s1
Definition: regdef.h:38
int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx)
generic function called after decoding the header and before a frame is decoded.
Definition: mpegvideo.c:1190
#define ER_DC_ERROR
#define MB_TYPE_SKIP
Definition: mpegutils.h:62
HW decoding through DXVA2, Picture.data[3] contains a LPDIRECT3DSURFACE9 pointer. ...
Definition: pixfmt.h:133
static int mpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_output, AVPacket *avpkt)
Definition: mpeg12dec.c:2787
#define MV_DIR_FORWARD
Definition: mpegvideo.h:259
static int decode_chunks(AVCodecContext *avctx, AVFrame *picture, int *got_output, const uint8_t *buf, int buf_size)
Definition: mpeg12dec.c:2461
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:209
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:266
av_cold void ff_mpeg12_common_init(MpegEncContext *s)
Definition: mpeg12.c:107
#define AV_CODEC_CAP_TRUNCATED
Definition: avcodec.h:958
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:130
#define HWACCEL_VAAPI(codec)
Definition: hwaccel.h:73
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:510
int skip_bottom
Number of macroblock rows at the bottom which are skipped.
Definition: avcodec.h:2038
Pan Scan area.
Definition: avcodec.h:1068
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:215
uint8_t level
Definition: svq3.c:207
AVRational av_d2q(double d, int max)
Convert a double precision floating point number to a rational.
Definition: rational.c:106
int mv[2][4][2]
motion vectors for a macroblock first coordinate : 0 = forward 1 = backward second " : depend...
Definition: mpegvideo.h:273
#define FF_QSCALE_TYPE_MPEG2
Definition: internal.h:82
int b8_stride
2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
Definition: mpegvideo.h:128
Hardware surfaces for Direct3D11.
Definition: pixfmt.h:309
the normal 219*2^(n-8) "MPEG" YUV ranges
Definition: pixfmt.h:498
MpegEncContext.
Definition: mpegvideo.h:78
Picture * next_picture_ptr
pointer to the next picture (for bidir pred)
Definition: mpegvideo.h:180
struct AVCodecContext * avctx
Definition: mpegvideo.h:95
#define SHOW_SBITS(name, gb, num)
Definition: get_bits.h:194
static int av_cmp_q(AVRational a, AVRational b)
Compare two rationals.
Definition: rational.h:89
int ff_mpeg1_decode_block_intra(GetBitContext *gb, const uint16_t *quant_matrix, uint8_t *const scantable, int last_dc[3], int16_t *block, int index, int qscale)
Definition: mpeg12.c:240
discard all non reference
Definition: avcodec.h:788
const AVRational ff_mpeg2_aspect[16]
Definition: mpeg12data.c:395
static enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[]
Definition: mpeg12dec.c:1133
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
Y , 8bpp.
Definition: pixfmt.h:70
#define MB_TYPE_L0L1
Definition: mpegutils.h:69
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
common internal api header.
int mb_stride
mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11 ...
Definition: mpegvideo.h:127
void ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx)
Definition: mpegvideo.c:662
if(ret< 0)
Definition: vf_mcdeint.c:279
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
#define FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM
The decoder extracts and fills its parameters even if the frame is skipped due to the skip_frame sett...
Definition: internal.h:60
AVCodec ff_mpeg2video_decoder
Definition: mpeg12dec.c:2914
#define TEX_VLC_BITS
Definition: dv.h:96
static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
Definition: mpeg12dec.c:668
uint8_t * dest[3]
Definition: mpegvideo.h:292
static double c[64]
const uint8_t * buffer_end
Definition: get_bits.h:56
static void flush(AVCodecContext *avctx)
Definition: mpeg12dec.c:2862
VLC ff_mbincr_vlc
Definition: mpeg12.c:132
Picture * last_picture_ptr
pointer to the previous picture.
Definition: mpegvideo.h:179
Bi-dir predicted.
Definition: avutil.h:276
Stereoscopic video.
static int mpeg1_decode_picture(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
Definition: mpeg12dec.c:1359
unsigned properties
Properties of the stream that gets decoded.
Definition: avcodec.h:3134
int den
Denominator.
Definition: rational.h:60
const uint8_t ff_alternate_vertical_scan[64]
int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src)
Definition: mpegvideo.c:455
AVStereo3D stereo3d
Definition: mpeg12dec.c:58
static int lowres
Definition: ffplay.c:331
#define IS_INTRA(x, y)
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2039
int16_t position[3][2]
position of the top left corner in 1/16 pel for up to 3 fields/frames
Definition: avcodec.h:1089
void * priv_data
Definition: avcodec.h:1530
#define PICT_FRAME
Definition: mpegutils.h:39
int frame_rate_index
Definition: mpegvideo.h:214
av_cold int ff_mpv_common_init(MpegEncContext *s)
init common structure for both encoder and decoder.
Definition: mpegvideo.c:877
static int mpeg_decode_postinit(AVCodecContext *avctx)
Definition: mpeg12dec.c:1222
static av_always_inline int diff(const uint32_t a, const uint32_t b)
int picture_structure
Definition: mpegvideo.h:455
av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
Definition: idctdsp.c:29
#define FF_DEBUG_STARTCODE
Definition: avcodec.h:2597
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:2794
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:85
void ff_mpv_frame_end(MpegEncContext *s)
Definition: mpegvideo.c:1414
#define MT_FRAME
Definition: mpeg12dec.c:664
#define MV_TYPE_DMV
2 vectors, special mpeg2 Dual Prime Vectors
Definition: mpegvideo.h:267
void ff_mpv_reconstruct_mb(MpegEncContext *s, int16_t block[12][64])
Definition: mpegvideo.c:2183
#define SEQ_START_CODE
Definition: mpegvideo.h:67
int resync_mb_y
y position of last resync marker
Definition: mpegvideo.h:354
int16_t(* block)[64]
points to one of the following blocks
Definition: mpegvideo.h:502
ParseContext parse_context
Definition: mpegvideo.h:359
VLC_TYPE(* table)[2]
code, bits
Definition: vlc.h:28
int64_t bit_rate
wanted bit rate
Definition: mpegvideo.h:100
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:279
static const uint8_t * align_get_bits(GetBitContext *s)
Definition: get_bits.h:464
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:1590
MpegEncContext mpeg_enc_ctx
Definition: mpeg12dec.c:54
int slice_count
Definition: mpeg12dec.c:64
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> dc
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:74
#define AV_CODEC_FLAG_TRUNCATED
Input bitstream might be truncated at a random location instead of only at frame boundaries.
Definition: avcodec.h:868
#define AV_CODEC_FLAG2_SHOW_ALL
Show all frames before the first keyframe.
Definition: avcodec.h:927
uint16_t intra_matrix[64]
matrix transmitted in the bitstream
Definition: mpegvideo.h:297
uint32_t * mb_type
types and macros are defined in mpegutils.h
Definition: mpegpicture.h:56
#define av_freep(p)
#define HWACCEL_VDPAU(codec)
Definition: hwaccel.h:75
ScanTable inter_scantable
if inter == intra then intra should be used to reduce the cache usage
Definition: mpegvideo.h:87
#define PICTURE_START_CODE
Definition: mpegvideo.h:69
static int skip_1stop_8data_bits(GetBitContext *gb)
Definition: get_bits.h:593
static const uint8_t start_code[]
HW decoding through Direct3D11 via old API, Picture.data[3] contains a ID3D11VideoDecoderOutputView p...
Definition: pixfmt.h:225
MPEG-1 4:2:0, JPEG 4:2:0, H.263 4:2:0.
Definition: pixfmt.h:521
#define ER_AC_END
int(* decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
Callback for each slice.
Definition: avcodec.h:3638
static int slice_decode_thread(AVCodecContext *c, void *arg)
Definition: mpeg12dec.c:1988
int(* end_frame)(AVCodecContext *avctx)
Called at the end of each frame or field picture.
Definition: avcodec.h:3649
static enum AVPixelFormat mpeg12_pixfmt_list_444[]
Definition: mpeg12dec.c:1179
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
This structure stores compressed data.
Definition: avcodec.h:1392
void ff_mpv_report_decode_progress(MpegEncContext *s)
Definition: mpegvideo.c:2279
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:957
#define MB_TYPE_L0
Definition: mpegutils.h:67
static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
Definition: mpeg12dec.c:1473
Predicted.
Definition: avutil.h:275
#define AV_TIMECODE_STR_SIZE
Definition: timecode.h:33
int64_t rc_max_rate
maximum bitrate
Definition: avcodec.h:2376
const AVRational ff_mpeg12_frame_rate_tab[]
AVPanScan pan_scan
Definition: mpeg12dec.c:57
VLC ff_mb_btype_vlc
Definition: mpeg12.c:134