FFmpeg  4.1.11
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  * Changing this would eat up any speed benefits it has.
224  * Do not use "fast" flag if you need the code to be robust.
225  */
227  int16_t *block, int n)
228 {
229  int level, i, j, run;
230  RLTable *rl = &ff_rl_mpeg1;
231  uint8_t *const scantable = s->intra_scantable.permutated;
232  const int qscale = s->qscale;
233 
234  {
235  OPEN_READER(re, &s->gb);
236  i = -1;
237  // Special case for first coefficient, no need to add second VLC table.
238  UPDATE_CACHE(re, &s->gb);
239  if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
240  level = (3 * qscale) >> 1;
241  level = (level - 1) | 1;
242  if (GET_CACHE(re, &s->gb) & 0x40000000)
243  level = -level;
244  block[0] = level;
245  i++;
246  SKIP_BITS(re, &s->gb, 2);
247  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
248  goto end;
249  }
250 
251  /* now quantify & encode AC coefficients */
252  for (;;) {
253  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
254  TEX_VLC_BITS, 2, 0);
255 
256  if (level != 0) {
257  i += run;
258  if (i > MAX_INDEX)
259  break;
260  j = scantable[i];
261  level = ((level * 2 + 1) * qscale) >> 1;
262  level = (level - 1) | 1;
263  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
264  SHOW_SBITS(re, &s->gb, 1);
265  SKIP_BITS(re, &s->gb, 1);
266  } else {
267  /* escape */
268  run = SHOW_UBITS(re, &s->gb, 6) + 1;
269  LAST_SKIP_BITS(re, &s->gb, 6);
270  UPDATE_CACHE(re, &s->gb);
271  level = SHOW_SBITS(re, &s->gb, 8);
272  SKIP_BITS(re, &s->gb, 8);
273  if (level == -128) {
274  level = SHOW_UBITS(re, &s->gb, 8) - 256;
275  SKIP_BITS(re, &s->gb, 8);
276  } else if (level == 0) {
277  level = SHOW_UBITS(re, &s->gb, 8);
278  SKIP_BITS(re, &s->gb, 8);
279  }
280  i += run;
281  if (i > MAX_INDEX)
282  break;
283  j = scantable[i];
284  if (level < 0) {
285  level = -level;
286  level = ((level * 2 + 1) * qscale) >> 1;
287  level = (level - 1) | 1;
288  level = -level;
289  } else {
290  level = ((level * 2 + 1) * qscale) >> 1;
291  level = (level - 1) | 1;
292  }
293  }
294 
295  block[j] = level;
296  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
297  break;
298  UPDATE_CACHE(re, &s->gb);
299  }
300 end:
301  LAST_SKIP_BITS(re, &s->gb, 2);
302  CLOSE_READER(re, &s->gb);
303  }
304 
305  check_scantable_index(s, i);
306 
307  s->block_last_index[n] = i;
308  return 0;
309 }
310 
312  int16_t *block, int n)
313 {
314  int level, i, j, run;
315  RLTable *rl = &ff_rl_mpeg1;
316  uint8_t *const scantable = s->intra_scantable.permutated;
317  const uint16_t *quant_matrix;
318  const int qscale = s->qscale;
319  int mismatch;
320 
321  mismatch = 1;
322 
323  {
324  OPEN_READER(re, &s->gb);
325  i = -1;
326  if (n < 4)
327  quant_matrix = s->inter_matrix;
328  else
329  quant_matrix = s->chroma_inter_matrix;
330 
331  // Special case for first coefficient, no need to add second VLC table.
332  UPDATE_CACHE(re, &s->gb);
333  if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
334  level = (3 * qscale * quant_matrix[0]) >> 5;
335  if (GET_CACHE(re, &s->gb) & 0x40000000)
336  level = -level;
337  block[0] = level;
338  mismatch ^= level;
339  i++;
340  SKIP_BITS(re, &s->gb, 2);
341  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
342  goto end;
343  }
344 
345  /* now quantify & encode AC coefficients */
346  for (;;) {
347  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
348  TEX_VLC_BITS, 2, 0);
349 
350  if (level != 0) {
351  i += run;
352  if (i > MAX_INDEX)
353  break;
354  j = scantable[i];
355  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
356  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
357  SHOW_SBITS(re, &s->gb, 1);
358  SKIP_BITS(re, &s->gb, 1);
359  } else {
360  /* escape */
361  run = SHOW_UBITS(re, &s->gb, 6) + 1;
362  LAST_SKIP_BITS(re, &s->gb, 6);
363  UPDATE_CACHE(re, &s->gb);
364  level = SHOW_SBITS(re, &s->gb, 12);
365  SKIP_BITS(re, &s->gb, 12);
366 
367  i += run;
368  if (i > MAX_INDEX)
369  break;
370  j = scantable[i];
371  if (level < 0) {
372  level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
373  level = -level;
374  } else {
375  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
376  }
377  }
378 
379  mismatch ^= level;
380  block[j] = level;
381  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
382  break;
383  UPDATE_CACHE(re, &s->gb);
384  }
385 end:
386  LAST_SKIP_BITS(re, &s->gb, 2);
387  CLOSE_READER(re, &s->gb);
388  }
389  block[63] ^= (mismatch & 1);
390 
391  check_scantable_index(s, i);
392 
393  s->block_last_index[n] = i;
394  return 0;
395 }
396 
397 /**
398  * Changing this would eat up any speed benefits it has.
399  * Do not use "fast" flag if you need the code to be robust.
400  */
402  int16_t *block, int n)
403 {
404  int level, i, j, run;
405  RLTable *rl = &ff_rl_mpeg1;
406  uint8_t *const scantable = s->intra_scantable.permutated;
407  const int qscale = s->qscale;
408  OPEN_READER(re, &s->gb);
409  i = -1;
410 
411  // special case for first coefficient, no need to add second VLC table
412  UPDATE_CACHE(re, &s->gb);
413  if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
414  level = (3 * qscale) >> 1;
415  if (GET_CACHE(re, &s->gb) & 0x40000000)
416  level = -level;
417  block[0] = level;
418  i++;
419  SKIP_BITS(re, &s->gb, 2);
420  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
421  goto end;
422  }
423 
424  /* now quantify & encode AC coefficients */
425  for (;;) {
426  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
427 
428  if (level != 0) {
429  i += run;
430  if (i > MAX_INDEX)
431  break;
432  j = scantable[i];
433  level = ((level * 2 + 1) * qscale) >> 1;
434  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
435  SHOW_SBITS(re, &s->gb, 1);
436  SKIP_BITS(re, &s->gb, 1);
437  } else {
438  /* escape */
439  run = SHOW_UBITS(re, &s->gb, 6) + 1;
440  LAST_SKIP_BITS(re, &s->gb, 6);
441  UPDATE_CACHE(re, &s->gb);
442  level = SHOW_SBITS(re, &s->gb, 12);
443  SKIP_BITS(re, &s->gb, 12);
444 
445  i += run;
446  if (i > MAX_INDEX)
447  break;
448  j = scantable[i];
449  if (level < 0) {
450  level = ((-level * 2 + 1) * qscale) >> 1;
451  level = -level;
452  } else {
453  level = ((level * 2 + 1) * qscale) >> 1;
454  }
455  }
456 
457  block[j] = level;
458  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF || i > 63)
459  break;
460 
461  UPDATE_CACHE(re, &s->gb);
462  }
463 end:
464  LAST_SKIP_BITS(re, &s->gb, 2);
465  CLOSE_READER(re, &s->gb);
466 
467  check_scantable_index(s, i);
468 
469  s->block_last_index[n] = i;
470  return 0;
471 }
472 
474  int16_t *block, int n)
475 {
476  int level, dc, diff, i, j, run;
477  int component;
478  RLTable *rl;
479  uint8_t *const scantable = s->intra_scantable.permutated;
480  const uint16_t *quant_matrix;
481  const int qscale = s->qscale;
482  int mismatch;
483 
484  /* DC coefficient */
485  if (n < 4) {
486  quant_matrix = s->intra_matrix;
487  component = 0;
488  } else {
489  quant_matrix = s->chroma_intra_matrix;
490  component = (n & 1) + 1;
491  }
492  diff = decode_dc(&s->gb, component);
493  if (diff >= 0xffff)
494  return AVERROR_INVALIDDATA;
495  dc = s->last_dc[component];
496  dc += diff;
497  s->last_dc[component] = dc;
498  block[0] = dc * (1 << (3 - s->intra_dc_precision));
499  ff_tlog(s->avctx, "dc=%d\n", block[0]);
500  mismatch = block[0] ^ 1;
501  i = 0;
502  if (s->intra_vlc_format)
503  rl = &ff_rl_mpeg2;
504  else
505  rl = &ff_rl_mpeg1;
506 
507  {
508  OPEN_READER(re, &s->gb);
509  /* now quantify & encode AC coefficients */
510  for (;;) {
511  UPDATE_CACHE(re, &s->gb);
512  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
513  TEX_VLC_BITS, 2, 0);
514 
515  if (level == 127) {
516  break;
517  } else if (level != 0) {
518  i += run;
519  if (i > MAX_INDEX)
520  break;
521  j = scantable[i];
522  level = (level * qscale * quant_matrix[j]) >> 4;
523  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
524  SHOW_SBITS(re, &s->gb, 1);
525  LAST_SKIP_BITS(re, &s->gb, 1);
526  } else {
527  /* escape */
528  run = SHOW_UBITS(re, &s->gb, 6) + 1;
529  LAST_SKIP_BITS(re, &s->gb, 6);
530  UPDATE_CACHE(re, &s->gb);
531  level = SHOW_SBITS(re, &s->gb, 12);
532  SKIP_BITS(re, &s->gb, 12);
533  i += run;
534  if (i > MAX_INDEX)
535  break;
536  j = scantable[i];
537  if (level < 0) {
538  level = (-level * qscale * quant_matrix[j]) >> 4;
539  level = -level;
540  } else {
541  level = (level * qscale * quant_matrix[j]) >> 4;
542  }
543  }
544 
545  mismatch ^= level;
546  block[j] = level;
547  }
548  CLOSE_READER(re, &s->gb);
549  }
550  block[63] ^= mismatch & 1;
551 
552  check_scantable_index(s, i);
553 
554  s->block_last_index[n] = i;
555  return 0;
556 }
557 
558 /**
559  * Changing this would eat up any speed benefits it has.
560  * Do not use "fast" flag if you need the code to be robust.
561  */
563  int16_t *block, int n)
564 {
565  int level, dc, diff, i, j, run;
566  int component;
567  RLTable *rl;
568  uint8_t *const scantable = s->intra_scantable.permutated;
569  const uint16_t *quant_matrix;
570  const int qscale = s->qscale;
571 
572  /* DC coefficient */
573  if (n < 4) {
574  quant_matrix = s->intra_matrix;
575  component = 0;
576  } else {
577  quant_matrix = s->chroma_intra_matrix;
578  component = (n & 1) + 1;
579  }
580  diff = decode_dc(&s->gb, component);
581  if (diff >= 0xffff)
582  return AVERROR_INVALIDDATA;
583  dc = s->last_dc[component];
584  dc += diff;
585  s->last_dc[component] = dc;
586  block[0] = dc * (1 << (3 - s->intra_dc_precision));
587  i = 0;
588  if (s->intra_vlc_format)
589  rl = &ff_rl_mpeg2;
590  else
591  rl = &ff_rl_mpeg1;
592 
593  {
594  OPEN_READER(re, &s->gb);
595  /* now quantify & encode AC coefficients */
596  for (;;) {
597  UPDATE_CACHE(re, &s->gb);
598  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
599  TEX_VLC_BITS, 2, 0);
600 
601  if (level >= 64 || i > 63) {
602  break;
603  } else if (level != 0) {
604  i += run;
605  j = scantable[i];
606  level = (level * qscale * quant_matrix[j]) >> 4;
607  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
608  SHOW_SBITS(re, &s->gb, 1);
609  LAST_SKIP_BITS(re, &s->gb, 1);
610  } else {
611  /* escape */
612  run = SHOW_UBITS(re, &s->gb, 6) + 1;
613  LAST_SKIP_BITS(re, &s->gb, 6);
614  UPDATE_CACHE(re, &s->gb);
615  level = SHOW_SBITS(re, &s->gb, 12);
616  SKIP_BITS(re, &s->gb, 12);
617  i += run;
618  j = scantable[i];
619  if (level < 0) {
620  level = (-level * qscale * quant_matrix[j]) >> 4;
621  level = -level;
622  } else {
623  level = (level * qscale * quant_matrix[j]) >> 4;
624  }
625  }
626 
627  block[j] = level;
628  }
629  CLOSE_READER(re, &s->gb);
630  }
631 
632  check_scantable_index(s, i);
633 
634  s->block_last_index[n] = i;
635  return 0;
636 }
637 
638 /******************************************/
639 /* decoding */
640 
641 static inline int get_dmv(MpegEncContext *s)
642 {
643  if (get_bits1(&s->gb))
644  return 1 - (get_bits1(&s->gb) << 1);
645  else
646  return 0;
647 }
648 
649 /* motion type (for MPEG-2) */
650 #define MT_FIELD 1
651 #define MT_FRAME 2
652 #define MT_16X8 2
653 #define MT_DMV 3
654 
655 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
656 {
657  int i, j, k, cbp, val, mb_type, motion_type;
658  const int mb_block_count = 4 + (1 << s->chroma_format);
659  int ret;
660 
661  ff_tlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
662 
663  av_assert2(s->mb_skipped == 0);
664 
665  if (s->mb_skip_run-- != 0) {
666  if (s->pict_type == AV_PICTURE_TYPE_P) {
667  s->mb_skipped = 1;
668  s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
670  } else {
671  int mb_type;
672 
673  if (s->mb_x)
674  mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
675  else
676  // FIXME not sure if this is allowed in MPEG at all
677  mb_type = s->current_picture.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1];
678  if (IS_INTRA(mb_type)) {
679  av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
680  return AVERROR_INVALIDDATA;
681  }
682  s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
683  mb_type | MB_TYPE_SKIP;
684 
685  if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
686  s->mb_skipped = 1;
687  }
688 
689  return 0;
690  }
691 
692  switch (s->pict_type) {
693  default:
694  case AV_PICTURE_TYPE_I:
695  if (get_bits1(&s->gb) == 0) {
696  if (get_bits1(&s->gb) == 0) {
698  "Invalid mb type in I-frame at %d %d\n",
699  s->mb_x, s->mb_y);
700  return AVERROR_INVALIDDATA;
701  }
702  mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
703  } else {
704  mb_type = MB_TYPE_INTRA;
705  }
706  break;
707  case AV_PICTURE_TYPE_P:
708  mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
709  if (mb_type < 0) {
711  "Invalid mb type in P-frame at %d %d\n", s->mb_x, s->mb_y);
712  return AVERROR_INVALIDDATA;
713  }
714  mb_type = ptype2mb_type[mb_type];
715  break;
716  case AV_PICTURE_TYPE_B:
717  mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
718  if (mb_type < 0) {
720  "Invalid mb type in B-frame at %d %d\n", s->mb_x, s->mb_y);
721  return AVERROR_INVALIDDATA;
722  }
723  mb_type = btype2mb_type[mb_type];
724  break;
725  }
726  ff_tlog(s->avctx, "mb_type=%x\n", mb_type);
727 // motion_type = 0; /* avoid warning */
728  if (IS_INTRA(mb_type)) {
729  s->bdsp.clear_blocks(s->block[0]);
730 
731  if (!s->chroma_y_shift)
732  s->bdsp.clear_blocks(s->block[6]);
733 
734  /* compute DCT type */
735  // FIXME: add an interlaced_dct coded var?
736  if (s->picture_structure == PICT_FRAME &&
738  s->interlaced_dct = get_bits1(&s->gb);
739 
740  if (IS_QUANT(mb_type))
741  s->qscale = mpeg_get_qscale(s);
742 
744  /* just parse them */
745  if (s->picture_structure != PICT_FRAME)
746  skip_bits1(&s->gb); /* field select */
747 
748  s->mv[0][0][0] =
749  s->last_mv[0][0][0] =
750  s->last_mv[0][1][0] = mpeg_decode_motion(s, s->mpeg_f_code[0][0],
751  s->last_mv[0][0][0]);
752  s->mv[0][0][1] =
753  s->last_mv[0][0][1] =
754  s->last_mv[0][1][1] = mpeg_decode_motion(s, s->mpeg_f_code[0][1],
755  s->last_mv[0][0][1]);
756 
757  check_marker(s->avctx, &s->gb, "after concealment_motion_vectors");
758  } else {
759  /* reset mv prediction */
760  memset(s->last_mv, 0, sizeof(s->last_mv));
761  }
762  s->mb_intra = 1;
763  // if 1, we memcpy blocks in xvmcvideo
765  ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
766 
767  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
768  if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
769  for (i = 0; i < 6; i++)
771  } else {
772  for (i = 0; i < mb_block_count; i++)
773  if ((ret = mpeg2_decode_block_intra(s, *s->pblocks[i], i)) < 0)
774  return ret;
775  }
776  } else {
777  for (i = 0; i < 6; i++) {
779  s->intra_matrix,
781  s->last_dc, *s->pblocks[i],
782  i, s->qscale);
783  if (ret < 0) {
784  av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n",
785  s->mb_x, s->mb_y);
786  return ret;
787  }
788 
789  s->block_last_index[i] = ret;
790  }
791  }
792  } else {
793  if (mb_type & MB_TYPE_ZERO_MV) {
794  av_assert2(mb_type & MB_TYPE_CBP);
795 
796  s->mv_dir = MV_DIR_FORWARD;
797  if (s->picture_structure == PICT_FRAME) {
798  if (s->picture_structure == PICT_FRAME
799  && !s->frame_pred_frame_dct)
800  s->interlaced_dct = get_bits1(&s->gb);
801  s->mv_type = MV_TYPE_16X16;
802  } else {
803  s->mv_type = MV_TYPE_FIELD;
804  mb_type |= MB_TYPE_INTERLACED;
805  s->field_select[0][0] = s->picture_structure - 1;
806  }
807 
808  if (IS_QUANT(mb_type))
809  s->qscale = mpeg_get_qscale(s);
810 
811  s->last_mv[0][0][0] = 0;
812  s->last_mv[0][0][1] = 0;
813  s->last_mv[0][1][0] = 0;
814  s->last_mv[0][1][1] = 0;
815  s->mv[0][0][0] = 0;
816  s->mv[0][0][1] = 0;
817  } else {
818  av_assert2(mb_type & MB_TYPE_L0L1);
819  // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
820  /* get additional motion vector type */
822  motion_type = MT_FRAME;
823  } else {
824  motion_type = get_bits(&s->gb, 2);
825  if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
826  s->interlaced_dct = get_bits1(&s->gb);
827  }
828 
829  if (IS_QUANT(mb_type))
830  s->qscale = mpeg_get_qscale(s);
831 
832  /* motion vectors */
833  s->mv_dir = (mb_type >> 13) & 3;
834  ff_tlog(s->avctx, "motion_type=%d\n", motion_type);
835  switch (motion_type) {
836  case MT_FRAME: /* or MT_16X8 */
837  if (s->picture_structure == PICT_FRAME) {
838  mb_type |= MB_TYPE_16x16;
839  s->mv_type = MV_TYPE_16X16;
840  for (i = 0; i < 2; i++) {
841  if (USES_LIST(mb_type, i)) {
842  /* MT_FRAME */
843  s->mv[i][0][0] =
844  s->last_mv[i][0][0] =
845  s->last_mv[i][1][0] =
846  mpeg_decode_motion(s, s->mpeg_f_code[i][0],
847  s->last_mv[i][0][0]);
848  s->mv[i][0][1] =
849  s->last_mv[i][0][1] =
850  s->last_mv[i][1][1] =
851  mpeg_decode_motion(s, s->mpeg_f_code[i][1],
852  s->last_mv[i][0][1]);
853  /* full_pel: only for MPEG-1 */
854  if (s->full_pel[i]) {
855  s->mv[i][0][0] *= 2;
856  s->mv[i][0][1] *= 2;
857  }
858  }
859  }
860  } else {
861  mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
862  s->mv_type = MV_TYPE_16X8;
863  for (i = 0; i < 2; i++) {
864  if (USES_LIST(mb_type, i)) {
865  /* MT_16X8 */
866  for (j = 0; j < 2; j++) {
867  s->field_select[i][j] = get_bits1(&s->gb);
868  for (k = 0; k < 2; k++) {
869  val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
870  s->last_mv[i][j][k]);
871  s->last_mv[i][j][k] = val;
872  s->mv[i][j][k] = val;
873  }
874  }
875  }
876  }
877  }
878  break;
879  case MT_FIELD:
880  s->mv_type = MV_TYPE_FIELD;
881  if (s->picture_structure == PICT_FRAME) {
882  mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
883  for (i = 0; i < 2; i++) {
884  if (USES_LIST(mb_type, i)) {
885  for (j = 0; j < 2; j++) {
886  s->field_select[i][j] = get_bits1(&s->gb);
887  val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
888  s->last_mv[i][j][0]);
889  s->last_mv[i][j][0] = val;
890  s->mv[i][j][0] = val;
891  ff_tlog(s->avctx, "fmx=%d\n", val);
892  val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
893  s->last_mv[i][j][1] >> 1);
894  s->last_mv[i][j][1] = 2 * val;
895  s->mv[i][j][1] = val;
896  ff_tlog(s->avctx, "fmy=%d\n", val);
897  }
898  }
899  }
900  } else {
902  mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
903  for (i = 0; i < 2; i++) {
904  if (USES_LIST(mb_type, i)) {
905  s->field_select[i][0] = get_bits1(&s->gb);
906  for (k = 0; k < 2; k++) {
907  val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
908  s->last_mv[i][0][k]);
909  s->last_mv[i][0][k] = val;
910  s->last_mv[i][1][k] = val;
911  s->mv[i][0][k] = val;
912  }
913  }
914  }
915  }
916  break;
917  case MT_DMV:
918  if (s->progressive_sequence){
919  av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
920  return AVERROR_INVALIDDATA;
921  }
922  s->mv_type = MV_TYPE_DMV;
923  for (i = 0; i < 2; i++) {
924  if (USES_LIST(mb_type, i)) {
925  int dmx, dmy, mx, my, m;
926  const int my_shift = s->picture_structure == PICT_FRAME;
927 
928  mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
929  s->last_mv[i][0][0]);
930  s->last_mv[i][0][0] = mx;
931  s->last_mv[i][1][0] = mx;
932  dmx = get_dmv(s);
933  my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
934  s->last_mv[i][0][1] >> my_shift);
935  dmy = get_dmv(s);
936 
937 
938  s->last_mv[i][0][1] = my * (1 << my_shift);
939  s->last_mv[i][1][1] = my * (1 << my_shift);
940 
941  s->mv[i][0][0] = mx;
942  s->mv[i][0][1] = my;
943  s->mv[i][1][0] = mx; // not used
944  s->mv[i][1][1] = my; // not used
945 
946  if (s->picture_structure == PICT_FRAME) {
947  mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
948 
949  // m = 1 + 2 * s->top_field_first;
950  m = s->top_field_first ? 1 : 3;
951 
952  /* top -> top pred */
953  s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
954  s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
955  m = 4 - m;
956  s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
957  s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
958  } else {
959  mb_type |= MB_TYPE_16x16;
960 
961  s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
962  s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
964  s->mv[i][2][1]--;
965  else
966  s->mv[i][2][1]++;
967  }
968  }
969  }
970  break;
971  default:
973  "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
974  return AVERROR_INVALIDDATA;
975  }
976  }
977 
978  s->mb_intra = 0;
979  if (HAS_CBP(mb_type)) {
980  s->bdsp.clear_blocks(s->block[0]);
981 
983  if (mb_block_count > 6) {
984  cbp *= 1 << mb_block_count - 6;
985  cbp |= get_bits(&s->gb, mb_block_count - 6);
986  s->bdsp.clear_blocks(s->block[6]);
987  }
988  if (cbp <= 0) {
990  "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y);
991  return AVERROR_INVALIDDATA;
992  }
993 
994  // if 1, we memcpy blocks in xvmcvideo
996  ff_xvmc_pack_pblocks(s, cbp);
997 
998  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
999  if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1000  for (i = 0; i < 6; i++) {
1001  if (cbp & 32)
1003  else
1004  s->block_last_index[i] = -1;
1005  cbp += cbp;
1006  }
1007  } else {
1008  cbp <<= 12 - mb_block_count;
1009 
1010  for (i = 0; i < mb_block_count; i++) {
1011  if (cbp & (1 << 11)) {
1012  if ((ret = mpeg2_decode_block_non_intra(s, *s->pblocks[i], i)) < 0)
1013  return ret;
1014  } else {
1015  s->block_last_index[i] = -1;
1016  }
1017  cbp += cbp;
1018  }
1019  }
1020  } else {
1021  if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1022  for (i = 0; i < 6; i++) {
1023  if (cbp & 32)
1024  mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1025  else
1026  s->block_last_index[i] = -1;
1027  cbp += cbp;
1028  }
1029  } else {
1030  for (i = 0; i < 6; i++) {
1031  if (cbp & 32) {
1032  if ((ret = mpeg1_decode_block_inter(s, *s->pblocks[i], i)) < 0)
1033  return ret;
1034  } else {
1035  s->block_last_index[i] = -1;
1036  }
1037  cbp += cbp;
1038  }
1039  }
1040  }
1041  } else {
1042  for (i = 0; i < 12; i++)
1043  s->block_last_index[i] = -1;
1044  }
1045  }
1046 
1047  s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1048 
1049  return 0;
1050 }
1051 
1053 {
1054  Mpeg1Context *s = avctx->priv_data;
1056 
1058 
1059  if ( avctx->codec_tag != AV_RL32("VCR2")
1060  && avctx->codec_tag != AV_RL32("BW10"))
1061  avctx->coded_width = avctx->coded_height = 0; // do not trust dimensions from input
1062  ff_mpv_decode_init(s2, avctx);
1063 
1064  s->mpeg_enc_ctx.avctx = avctx;
1065 
1066  /* we need some permutation to store matrices,
1067  * until the decoder sets the real permutation. */
1068  ff_mpv_idct_init(s2);
1071 
1072  s2->chroma_format = 1;
1073  s->mpeg_enc_ctx_allocated = 0;
1075  s->repeat_field = 0;
1076  s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1077  avctx->color_range = AVCOL_RANGE_MPEG;
1078  return 0;
1079 }
1080 
1081 #if HAVE_THREADS
1082 static int mpeg_decode_update_thread_context(AVCodecContext *avctx,
1083  const AVCodecContext *avctx_from)
1084 {
1085  Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1086  MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1087  int err;
1088 
1089  if (avctx == avctx_from ||
1090  !ctx_from->mpeg_enc_ctx_allocated ||
1091  !s1->context_initialized)
1092  return 0;
1093 
1094  err = ff_mpeg_update_thread_context(avctx, avctx_from);
1095  if (err)
1096  return err;
1097 
1098  if (!ctx->mpeg_enc_ctx_allocated)
1099  memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1100 
1101  if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1102  s->picture_number++;
1103 
1104  return 0;
1105 }
1106 #endif
1107 
1108 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1109  const uint8_t *new_perm)
1110 {
1111  uint16_t temp_matrix[64];
1112  int i;
1113 
1114  memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1115 
1116  for (i = 0; i < 64; i++)
1117  matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1118 }
1119 
1121 #if CONFIG_MPEG1_NVDEC_HWACCEL
1123 #endif
1124 #if CONFIG_MPEG1_XVMC_HWACCEL
1126 #endif
1127 #if CONFIG_MPEG1_VDPAU_HWACCEL
1129 #endif
1132 };
1133 
1135 #if CONFIG_MPEG2_NVDEC_HWACCEL
1137 #endif
1138 #if CONFIG_MPEG2_XVMC_HWACCEL
1140 #endif
1141 #if CONFIG_MPEG2_VDPAU_HWACCEL
1143 #endif
1144 #if CONFIG_MPEG2_DXVA2_HWACCEL
1146 #endif
1147 #if CONFIG_MPEG2_D3D11VA_HWACCEL
1150 #endif
1151 #if CONFIG_MPEG2_VAAPI_HWACCEL
1153 #endif
1154 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
1156 #endif
1159 };
1160 
1161 static const enum AVPixelFormat mpeg12_pixfmt_list_422[] = {
1164 };
1165 
1166 static const enum AVPixelFormat mpeg12_pixfmt_list_444[] = {
1169 };
1170 
1172 {
1173  Mpeg1Context *s1 = avctx->priv_data;
1174  MpegEncContext *s = &s1->mpeg_enc_ctx;
1175  const enum AVPixelFormat *pix_fmts;
1176 
1177  if (CONFIG_GRAY && (avctx->flags & AV_CODEC_FLAG_GRAY))
1178  return AV_PIX_FMT_GRAY8;
1179 
1180  if (s->chroma_format < 2)
1181  pix_fmts = avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1184  else if (s->chroma_format == 2)
1185  pix_fmts = mpeg12_pixfmt_list_422;
1186  else
1187  pix_fmts = mpeg12_pixfmt_list_444;
1188 
1189  return ff_thread_get_format(avctx, pix_fmts);
1190 }
1191 
1193 {
1194  // until then pix_fmt may be changed right after codec init
1195  if (avctx->hwaccel)
1196  if (avctx->idct_algo == FF_IDCT_AUTO)
1197  avctx->idct_algo = FF_IDCT_NONE;
1198 
1199  if (avctx->hwaccel && avctx->pix_fmt == AV_PIX_FMT_XVMC) {
1200  Mpeg1Context *s1 = avctx->priv_data;
1201  MpegEncContext *s = &s1->mpeg_enc_ctx;
1202 
1203  s->pack_pblocks = 1;
1204  }
1205 }
1206 
1207 /* Call this function when we know all parameters.
1208  * It may be called in different places for MPEG-1 and MPEG-2. */
1210 {
1211  Mpeg1Context *s1 = avctx->priv_data;
1212  MpegEncContext *s = &s1->mpeg_enc_ctx;
1213  uint8_t old_permutation[64];
1214  int ret;
1215 
1216  if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1217  // MPEG-1 aspect
1218  AVRational aspect_inv = av_d2q(ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1219  avctx->sample_aspect_ratio = (AVRational) { aspect_inv.den, aspect_inv.num };
1220  } else { // MPEG-2
1221  // MPEG-2 aspect
1222  if (s->aspect_ratio_info > 1) {
1223  AVRational dar =
1225  (AVRational) { s1->pan_scan.width,
1226  s1->pan_scan.height }),
1227  (AVRational) { s->width, s->height });
1228 
1229  /* We ignore the spec here and guess a bit as reality does not
1230  * match the spec, see for example res_change_ffmpeg_aspect.ts
1231  * and sequence-display-aspect.mpg.
1232  * issue1613, 621, 562 */
1233  if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1234  (av_cmp_q(dar, (AVRational) { 4, 3 }) &&
1235  av_cmp_q(dar, (AVRational) { 16, 9 }))) {
1238  (AVRational) { s->width, s->height });
1239  } else {
1242  (AVRational) { s1->pan_scan.width, s1->pan_scan.height });
1243 // issue1613 4/3 16/9 -> 16/9
1244 // res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1245 // widescreen-issue562.mpg 4/3 16/9 -> 16/9
1246 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1247  ff_dlog(avctx, "aspect A %d/%d\n",
1250  ff_dlog(avctx, "aspect B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1252  }
1253  } else {
1256  }
1257  } // MPEG-2
1258 
1259  if (av_image_check_sar(s->width, s->height,
1260  avctx->sample_aspect_ratio) < 0) {
1261  av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
1262  avctx->sample_aspect_ratio.num,
1263  avctx->sample_aspect_ratio.den);
1264  avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
1265  }
1266 
1267  if ((s1->mpeg_enc_ctx_allocated == 0) ||
1268  avctx->coded_width != s->width ||
1269  avctx->coded_height != s->height ||
1270  s1->save_width != s->width ||
1271  s1->save_height != s->height ||
1273  (s1->save_progressive_seq != s->progressive_sequence && FFALIGN(s->height, 16) != FFALIGN(s->height, 32)) ||
1274  0) {
1275  if (s1->mpeg_enc_ctx_allocated) {
1276  ParseContext pc = s->parse_context;
1277  s->parse_context.buffer = 0;
1278  ff_mpv_common_end(s);
1279  s->parse_context = pc;
1280  s1->mpeg_enc_ctx_allocated = 0;
1281  }
1282 
1283  ret = ff_set_dimensions(avctx, s->width, s->height);
1284  if (ret < 0)
1285  return ret;
1286 
1287  if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1288  avctx->rc_max_rate = s->bit_rate;
1289  } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1290  (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1291  avctx->bit_rate = s->bit_rate;
1292  }
1294  s1->save_width = s->width;
1295  s1->save_height = s->height;
1297 
1298  /* low_delay may be forced, in this case we will have B-frames
1299  * that behave like P-frames. */
1300  avctx->has_b_frames = !s->low_delay;
1301 
1302  if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1303  // MPEG-1 fps
1305  avctx->ticks_per_frame = 1;
1306 
1308  } else { // MPEG-2
1309  // MPEG-2 fps
1311  &s->avctx->framerate.den,
1314  1 << 30);
1315  avctx->ticks_per_frame = 2;
1316 
1317  switch (s->chroma_format) {
1318  case 1: avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; break;
1319  case 2:
1320  case 3: avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; break;
1321  default: av_assert0(0);
1322  }
1323  } // MPEG-2
1324 
1325  avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1326  setup_hwaccel_for_pixfmt(avctx);
1327 
1328  /* Quantization matrices may need reordering
1329  * if DCT permutation is changed. */
1330  memcpy(old_permutation, s->idsp.idct_permutation, 64 * sizeof(uint8_t));
1331 
1332  ff_mpv_idct_init(s);
1333  if ((ret = ff_mpv_common_init(s)) < 0)
1334  return ret;
1335 
1336  quant_matrix_rebuild(s->intra_matrix, old_permutation, s->idsp.idct_permutation);
1337  quant_matrix_rebuild(s->inter_matrix, old_permutation, s->idsp.idct_permutation);
1340 
1341  s1->mpeg_enc_ctx_allocated = 1;
1342  }
1343  return 0;
1344 }
1345 
1347  int buf_size)
1348 {
1349  Mpeg1Context *s1 = avctx->priv_data;
1350  MpegEncContext *s = &s1->mpeg_enc_ctx;
1351  int ref, f_code, vbv_delay;
1352 
1353  init_get_bits(&s->gb, buf, buf_size * 8);
1354 
1355  ref = get_bits(&s->gb, 10); /* temporal ref */
1356  s->pict_type = get_bits(&s->gb, 3);
1357  if (s->pict_type == 0 || s->pict_type > 3)
1358  return AVERROR_INVALIDDATA;
1359 
1360  vbv_delay = get_bits(&s->gb, 16);
1361  s->vbv_delay = vbv_delay;
1362  if (s->pict_type == AV_PICTURE_TYPE_P ||
1363  s->pict_type == AV_PICTURE_TYPE_B) {
1364  s->full_pel[0] = get_bits1(&s->gb);
1365  f_code = get_bits(&s->gb, 3);
1366  if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1367  return AVERROR_INVALIDDATA;
1368  f_code += !f_code;
1369  s->mpeg_f_code[0][0] = f_code;
1370  s->mpeg_f_code[0][1] = f_code;
1371  }
1372  if (s->pict_type == AV_PICTURE_TYPE_B) {
1373  s->full_pel[1] = get_bits1(&s->gb);
1374  f_code = get_bits(&s->gb, 3);
1375  if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1376  return AVERROR_INVALIDDATA;
1377  f_code += !f_code;
1378  s->mpeg_f_code[1][0] = f_code;
1379  s->mpeg_f_code[1][1] = f_code;
1380  }
1383 
1384  if (avctx->debug & FF_DEBUG_PICT_INFO)
1385  av_log(avctx, AV_LOG_DEBUG,
1386  "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1387 
1388  s->y_dc_scale = 8;
1389  s->c_dc_scale = 8;
1390  return 0;
1391 }
1392 
1394 {
1395  MpegEncContext *s = &s1->mpeg_enc_ctx;
1396  int horiz_size_ext, vert_size_ext;
1397  int bit_rate_ext;
1398 
1399  skip_bits(&s->gb, 1); /* profile and level esc*/
1400  s->avctx->profile = get_bits(&s->gb, 3);
1401  s->avctx->level = get_bits(&s->gb, 4);
1402  s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1403  s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1404 
1405  if (!s->chroma_format) {
1406  s->chroma_format = 1;
1407  av_log(s->avctx, AV_LOG_WARNING, "Chroma format invalid\n");
1408  }
1409 
1410  horiz_size_ext = get_bits(&s->gb, 2);
1411  vert_size_ext = get_bits(&s->gb, 2);
1412  s->width |= (horiz_size_ext << 12);
1413  s->height |= (vert_size_ext << 12);
1414  bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1415  s->bit_rate += (bit_rate_ext << 18) * 400LL;
1416  check_marker(s->avctx, &s->gb, "after bit rate extension");
1417  s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1418 
1419  s->low_delay = get_bits1(&s->gb);
1421  s->low_delay = 1;
1422 
1423  s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1424  s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1425 
1426  ff_dlog(s->avctx, "sequence extension\n");
1428 
1429  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1431  "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%"PRId64"\n",
1433  s->avctx->rc_buffer_size, s->bit_rate);
1434 }
1435 
1437 {
1438  MpegEncContext *s = &s1->mpeg_enc_ctx;
1439  int color_description, w, h;
1440 
1441  skip_bits(&s->gb, 3); /* video format */
1442  color_description = get_bits1(&s->gb);
1443  if (color_description) {
1444  s->avctx->color_primaries = get_bits(&s->gb, 8);
1445  s->avctx->color_trc = get_bits(&s->gb, 8);
1446  s->avctx->colorspace = get_bits(&s->gb, 8);
1447  }
1448  w = get_bits(&s->gb, 14);
1449  skip_bits(&s->gb, 1); // marker
1450  h = get_bits(&s->gb, 14);
1451  // remaining 3 bits are zero padding
1452 
1453  s1->pan_scan.width = 16 * w;
1454  s1->pan_scan.height = 16 * h;
1455 
1456  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1457  av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1458 }
1459 
1461 {
1462  MpegEncContext *s = &s1->mpeg_enc_ctx;
1463  int i, nofco;
1464 
1465  nofco = 1;
1466  if (s->progressive_sequence) {
1467  if (s->repeat_first_field) {
1468  nofco++;
1469  if (s->top_field_first)
1470  nofco++;
1471  }
1472  } else {
1473  if (s->picture_structure == PICT_FRAME) {
1474  nofco++;
1475  if (s->repeat_first_field)
1476  nofco++;
1477  }
1478  }
1479  for (i = 0; i < nofco; i++) {
1480  s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1481  skip_bits(&s->gb, 1); // marker
1482  s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1483  skip_bits(&s->gb, 1); // marker
1484  }
1485 
1486  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1488  "pde (%"PRId16",%"PRId16") (%"PRId16",%"PRId16") (%"PRId16",%"PRId16")\n",
1489  s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1490  s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1491  s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1492 }
1493 
1494 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64],
1495  uint16_t matrix1[64], int intra)
1496 {
1497  int i;
1498 
1499  for (i = 0; i < 64; i++) {
1500  int j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
1501  int v = get_bits(&s->gb, 8);
1502  if (v == 0) {
1503  av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1504  return AVERROR_INVALIDDATA;
1505  }
1506  if (intra && i == 0 && v != 8) {
1507  av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1508  v = 8; // needed by pink.mpg / issue1046
1509  }
1510  matrix0[j] = v;
1511  if (matrix1)
1512  matrix1[j] = v;
1513  }
1514  return 0;
1515 }
1516 
1518 {
1519  ff_dlog(s->avctx, "matrix extension\n");
1520 
1521  if (get_bits1(&s->gb))
1523  if (get_bits1(&s->gb))
1525  if (get_bits1(&s->gb))
1527  if (get_bits1(&s->gb))
1529 }
1530 
1532 {
1533  MpegEncContext *s = &s1->mpeg_enc_ctx;
1534 
1535  s->full_pel[0] = s->full_pel[1] = 0;
1536  s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1537  s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1538  s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1539  s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1540  s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1541  s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1542  s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1543  s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1544  if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1546  "Missing picture start code, guessing missing values\n");
1547  if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1548  if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1550  else
1552  } else
1556  }
1557 
1558  s->intra_dc_precision = get_bits(&s->gb, 2);
1559  s->picture_structure = get_bits(&s->gb, 2);
1560  s->top_field_first = get_bits1(&s->gb);
1561  s->frame_pred_frame_dct = get_bits1(&s->gb);
1563  s->q_scale_type = get_bits1(&s->gb);
1564  s->intra_vlc_format = get_bits1(&s->gb);
1565  s->alternate_scan = get_bits1(&s->gb);
1566  s->repeat_first_field = get_bits1(&s->gb);
1567  s->chroma_420_type = get_bits1(&s->gb);
1568  s->progressive_frame = get_bits1(&s->gb);
1569 
1570  if (s->alternate_scan) {
1573  } else {
1576  }
1577 
1578  /* composite display not parsed */
1579  ff_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1580  ff_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1581  ff_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1582  ff_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1583  ff_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1584  ff_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1585  ff_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1586  ff_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1587  ff_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1588 }
1589 
1590 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1591 {
1592  AVCodecContext *avctx = s->avctx;
1593  Mpeg1Context *s1 = (Mpeg1Context *) s;
1594  int ret;
1595 
1596  /* start frame decoding */
1597  if (s->first_field || s->picture_structure == PICT_FRAME) {
1599 
1600  if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
1601  return ret;
1602 
1604 
1605  /* first check if we must repeat the frame */
1607  if (s->repeat_first_field) {
1608  if (s->progressive_sequence) {
1609  if (s->top_field_first)
1611  else
1613  } else if (s->progressive_frame) {
1615  }
1616  }
1617 
1620  sizeof(s1->pan_scan));
1621  if (!pan_scan)
1622  return AVERROR(ENOMEM);
1623  memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1624 
1625  if (s1->a53_caption) {
1628  s1->a53_caption_size);
1629  if (sd)
1630  memcpy(sd->data, s1->a53_caption, s1->a53_caption_size);
1631  av_freep(&s1->a53_caption);
1632  }
1633 
1634  if (s1->has_stereo3d) {
1636  if (!stereo)
1637  return AVERROR(ENOMEM);
1638 
1639  *stereo = s1->stereo3d;
1640  s1->has_stereo3d = 0;
1641  }
1642 
1643  if (s1->has_afd) {
1644  AVFrameSideData *sd =
1646  AV_FRAME_DATA_AFD, 1);
1647  if (!sd)
1648  return AVERROR(ENOMEM);
1649 
1650  *sd->data = s1->afd;
1651  s1->has_afd = 0;
1652  }
1653 
1655  ff_thread_finish_setup(avctx);
1656  } else { // second field
1657  int i;
1658 
1659  if (!s->current_picture_ptr) {
1660  av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1661  return AVERROR_INVALIDDATA;
1662  }
1663 
1664  if (s->avctx->hwaccel &&
1666  if ((ret = s->avctx->hwaccel->end_frame(s->avctx)) < 0) {
1667  av_log(avctx, AV_LOG_ERROR,
1668  "hardware accelerator failed to decode first field\n");
1669  return ret;
1670  }
1671  }
1672 
1673  for (i = 0; i < 4; i++) {
1676  s->current_picture.f->data[i] +=
1678  }
1679  }
1680 
1681  if (avctx->hwaccel) {
1682  if ((ret = avctx->hwaccel->start_frame(avctx, buf, buf_size)) < 0)
1683  return ret;
1684  }
1685 
1686  return 0;
1687 }
1688 
1689 #define DECODE_SLICE_ERROR -1
1690 #define DECODE_SLICE_OK 0
1691 
1692 /**
1693  * Decode a slice.
1694  * MpegEncContext.mb_y must be set to the MB row from the startcode.
1695  * @return DECODE_SLICE_ERROR if the slice is damaged,
1696  * DECODE_SLICE_OK if this slice is OK
1697  */
1698 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1699  const uint8_t **buf, int buf_size)
1700 {
1701  AVCodecContext *avctx = s->avctx;
1702  const int lowres = s->avctx->lowres;
1703  const int field_pic = s->picture_structure != PICT_FRAME;
1704  int ret;
1705 
1706  s->resync_mb_x =
1707  s->resync_mb_y = -1;
1708 
1709  av_assert0(mb_y < s->mb_height);
1710 
1711  init_get_bits(&s->gb, *buf, buf_size * 8);
1712  if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1713  skip_bits(&s->gb, 3);
1714 
1716  s->interlaced_dct = 0;
1717 
1718  s->qscale = mpeg_get_qscale(s);
1719 
1720  if (s->qscale == 0) {
1721  av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1722  return AVERROR_INVALIDDATA;
1723  }
1724 
1725  /* extra slice info */
1726  if (skip_1stop_8data_bits(&s->gb) < 0)
1727  return AVERROR_INVALIDDATA;
1728 
1729  s->mb_x = 0;
1730 
1731  if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1732  skip_bits1(&s->gb);
1733  } else {
1734  while (get_bits_left(&s->gb) > 0) {
1735  int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1736  MBINCR_VLC_BITS, 2);
1737  if (code < 0) {
1738  av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1739  return AVERROR_INVALIDDATA;
1740  }
1741  if (code >= 33) {
1742  if (code == 33)
1743  s->mb_x += 33;
1744  /* otherwise, stuffing, nothing to do */
1745  } else {
1746  s->mb_x += code;
1747  break;
1748  }
1749  }
1750  }
1751 
1752  if (s->mb_x >= (unsigned) s->mb_width) {
1753  av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1754  return AVERROR_INVALIDDATA;
1755  }
1756 
1757  if (avctx->hwaccel && avctx->hwaccel->decode_slice) {
1758  const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1759  int start_code = -1;
1760  buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1761  if (buf_end < *buf + buf_size)
1762  buf_end -= 4;
1763  s->mb_y = mb_y;
1764  if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1765  return DECODE_SLICE_ERROR;
1766  *buf = buf_end;
1767  return DECODE_SLICE_OK;
1768  }
1769 
1770  s->resync_mb_x = s->mb_x;
1771  s->resync_mb_y = s->mb_y = mb_y;
1772  s->mb_skip_run = 0;
1774 
1775  if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1776  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1778  "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",
1779  s->qscale,
1780  s->mpeg_f_code[0][0], s->mpeg_f_code[0][1],
1781  s->mpeg_f_code[1][0], s->mpeg_f_code[1][1],
1782  s->pict_type == AV_PICTURE_TYPE_I ? "I" :
1783  (s->pict_type == AV_PICTURE_TYPE_P ? "P" :
1784  (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")),
1785  s->progressive_sequence ? "ps" : "",
1786  s->progressive_frame ? "pf" : "",
1787  s->alternate_scan ? "alt" : "",
1788  s->top_field_first ? "top" : "",
1792  s->repeat_first_field, s->chroma_420_type ? "420" : "");
1793  }
1794  }
1795 
1796  for (;;) {
1797  // If 1, we memcpy blocks in xvmcvideo.
1799  ff_xvmc_init_block(s); // set s->block
1800 
1801  if ((ret = mpeg_decode_mb(s, s->block)) < 0)
1802  return ret;
1803 
1804  // Note motion_val is normally NULL unless we want to extract the MVs.
1805  if (s->current_picture.motion_val[0] && !s->encoding) {
1806  const int wrap = s->b8_stride;
1807  int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1808  int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1809  int motion_x, motion_y, dir, i;
1810 
1811  for (i = 0; i < 2; i++) {
1812  for (dir = 0; dir < 2; dir++) {
1813  if (s->mb_intra ||
1814  (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1815  motion_x = motion_y = 0;
1816  } else if (s->mv_type == MV_TYPE_16X16 ||
1817  (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1818  motion_x = s->mv[dir][0][0];
1819  motion_y = s->mv[dir][0][1];
1820  } else { /* if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8)) */
1821  motion_x = s->mv[dir][i][0];
1822  motion_y = s->mv[dir][i][1];
1823  }
1824 
1825  s->current_picture.motion_val[dir][xy][0] = motion_x;
1826  s->current_picture.motion_val[dir][xy][1] = motion_y;
1827  s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1828  s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1829  s->current_picture.ref_index [dir][b8_xy] =
1830  s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1831  av_assert2(s->field_select[dir][i] == 0 ||
1832  s->field_select[dir][i] == 1);
1833  }
1834  xy += wrap;
1835  b8_xy += 2;
1836  }
1837  }
1838 
1839  s->dest[0] += 16 >> lowres;
1840  s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1841  s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1842 
1844 
1845  if (++s->mb_x >= s->mb_width) {
1846  const int mb_size = 16 >> s->avctx->lowres;
1847  int left;
1848 
1849  ff_mpeg_draw_horiz_band(s, mb_size * (s->mb_y >> field_pic), mb_size);
1851 
1852  s->mb_x = 0;
1853  s->mb_y += 1 << field_pic;
1854 
1855  if (s->mb_y >= s->mb_height) {
1856  int left = get_bits_left(&s->gb);
1857  int is_d10 = s->chroma_format == 2 &&
1858  s->pict_type == AV_PICTURE_TYPE_I &&
1859  avctx->profile == 0 && avctx->level == 5 &&
1860  s->intra_dc_precision == 2 &&
1861  s->q_scale_type == 1 && s->alternate_scan == 0 &&
1862  s->progressive_frame == 0
1863  /* vbv_delay == 0xBBB || 0xE10 */;
1864 
1865  if (left >= 32 && !is_d10) {
1866  GetBitContext gb = s->gb;
1867  align_get_bits(&gb);
1868  if (show_bits(&gb, 24) == 0x060E2B) {
1869  av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1870  is_d10 = 1;
1871  }
1872  if (left > 32 && show_bits_long(&gb, 32) == 0x201) {
1873  av_log(avctx, AV_LOG_DEBUG, "skipping m704 alpha (unsupported)\n");
1874  goto eos;
1875  }
1876  }
1877 
1878  if (left < 0 ||
1879  (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) ||
1880  ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1881  av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X at %d %d\n",
1882  left, left>0 ? show_bits(&s->gb, FFMIN(left, 23)) : 0, s->mb_x, s->mb_y);
1883  return AVERROR_INVALIDDATA;
1884  } else
1885  goto eos;
1886  }
1887  // There are some files out there which are missing the last slice
1888  // in cases where the slice is completely outside the visible
1889  // area, we detect this here instead of running into the end expecting
1890  // more data
1891  left = get_bits_left(&s->gb);
1892  if (s->mb_y >= ((s->height + 15) >> 4) &&
1893  !s->progressive_sequence &&
1894  left <= 25 &&
1895  left >= 0 &&
1896  s->mb_skip_run == -1 &&
1897  (!left || show_bits(&s->gb, left) == 0))
1898  goto eos;
1899 
1901  }
1902 
1903  /* skip mb handling */
1904  if (s->mb_skip_run == -1) {
1905  /* read increment again */
1906  s->mb_skip_run = 0;
1907  for (;;) {
1908  int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1909  MBINCR_VLC_BITS, 2);
1910  if (code < 0) {
1911  av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1912  return AVERROR_INVALIDDATA;
1913  }
1914  if (code >= 33) {
1915  if (code == 33) {
1916  s->mb_skip_run += 33;
1917  } else if (code == 35) {
1918  if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1919  av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1920  return AVERROR_INVALIDDATA;
1921  }
1922  goto eos; /* end of slice */
1923  }
1924  /* otherwise, stuffing, nothing to do */
1925  } else {
1926  s->mb_skip_run += code;
1927  break;
1928  }
1929  }
1930  if (s->mb_skip_run) {
1931  int i;
1932  if (s->pict_type == AV_PICTURE_TYPE_I) {
1934  "skipped MB in I-frame at %d %d\n", s->mb_x, s->mb_y);
1935  return AVERROR_INVALIDDATA;
1936  }
1937 
1938  /* skip mb */
1939  s->mb_intra = 0;
1940  for (i = 0; i < 12; i++)
1941  s->block_last_index[i] = -1;
1943  s->mv_type = MV_TYPE_16X16;
1944  else
1945  s->mv_type = MV_TYPE_FIELD;
1946  if (s->pict_type == AV_PICTURE_TYPE_P) {
1947  /* if P type, zero motion vector is implied */
1948  s->mv_dir = MV_DIR_FORWARD;
1949  s->mv[0][0][0] = s->mv[0][0][1] = 0;
1950  s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1951  s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1952  s->field_select[0][0] = (s->picture_structure - 1) & 1;
1953  } else {
1954  /* if B type, reuse previous vectors and directions */
1955  s->mv[0][0][0] = s->last_mv[0][0][0];
1956  s->mv[0][0][1] = s->last_mv[0][0][1];
1957  s->mv[1][0][0] = s->last_mv[1][0][0];
1958  s->mv[1][0][1] = s->last_mv[1][0][1];
1959  s->field_select[0][0] = (s->picture_structure - 1) & 1;
1960  s->field_select[1][0] = (s->picture_structure - 1) & 1;
1961  }
1962  }
1963  }
1964  }
1965 eos: // end of slice
1966  if (get_bits_left(&s->gb) < 0) {
1967  av_log(s, AV_LOG_ERROR, "overread %d\n", -get_bits_left(&s->gb));
1968  return AVERROR_INVALIDDATA;
1969  }
1970  *buf += (get_bits_count(&s->gb) - 1) / 8;
1971  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);
1972  return 0;
1973 }
1974 
1976 {
1977  MpegEncContext *s = *(void **) arg;
1978  const uint8_t *buf = s->gb.buffer;
1979  int mb_y = s->start_mb_y;
1980  const int field_pic = s->picture_structure != PICT_FRAME;
1981 
1982  s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1983 
1984  for (;;) {
1985  uint32_t start_code;
1986  int ret;
1987 
1988  ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
1989  emms_c();
1990  ff_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1991  ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
1992  s->start_mb_y, s->end_mb_y, s->er.error_count);
1993  if (ret < 0) {
1994  if (c->err_recognition & AV_EF_EXPLODE)
1995  return ret;
1996  if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
1998  s->mb_x, s->mb_y,
2000  } else {
2002  s->mb_x - 1, s->mb_y,
2004  }
2005 
2006  if (s->mb_y == s->end_mb_y)
2007  return 0;
2008 
2009  start_code = -1;
2010  buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
2011  mb_y = start_code - SLICE_MIN_START_CODE;
2012  if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
2013  mb_y += (*buf&0xE0)<<2;
2014  mb_y <<= field_pic;
2016  mb_y++;
2017  if (mb_y < 0 || mb_y >= s->end_mb_y)
2018  return AVERROR_INVALIDDATA;
2019  }
2020 }
2021 
2022 /**
2023  * Handle slice ends.
2024  * @return 1 if it seems to be the last slice
2025  */
2026 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2027 {
2028  Mpeg1Context *s1 = avctx->priv_data;
2029  MpegEncContext *s = &s1->mpeg_enc_ctx;
2030 
2032  return 0;
2033 
2034  if (s->avctx->hwaccel) {
2035  int ret = s->avctx->hwaccel->end_frame(s->avctx);
2036  if (ret < 0) {
2037  av_log(avctx, AV_LOG_ERROR,
2038  "hardware accelerator failed to decode picture\n");
2039  return ret;
2040  }
2041  }
2042 
2043  /* end of slice reached */
2044  if (/* s->mb_y << field_pic == s->mb_height && */ !s->first_field && !s1->first_slice) {
2045  /* end of image */
2046 
2047  ff_er_frame_end(&s->er);
2048 
2049  ff_mpv_frame_end(s);
2050 
2051  if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
2052  int ret = av_frame_ref(pict, s->current_picture_ptr->f);
2053  if (ret < 0)
2054  return ret;
2057  } else {
2058  if (avctx->active_thread_type & FF_THREAD_FRAME)
2059  s->picture_number++;
2060  /* latency of 1 frame for I- and P-frames */
2061  /* XXX: use another variable than picture_number */
2062  if (s->last_picture_ptr) {
2063  int ret = av_frame_ref(pict, s->last_picture_ptr->f);
2064  if (ret < 0)
2065  return ret;
2068  }
2069  }
2070 
2071  return 1;
2072  } else {
2073  return 0;
2074  }
2075 }
2076 
2078  const uint8_t *buf, int buf_size)
2079 {
2080  Mpeg1Context *s1 = avctx->priv_data;
2081  MpegEncContext *s = &s1->mpeg_enc_ctx;
2082  int width, height;
2083  int i, v, j;
2084 
2085  init_get_bits(&s->gb, buf, buf_size * 8);
2086 
2087  width = get_bits(&s->gb, 12);
2088  height = get_bits(&s->gb, 12);
2089  if (width == 0 || height == 0) {
2090  av_log(avctx, AV_LOG_WARNING,
2091  "Invalid horizontal or vertical size value.\n");
2093  return AVERROR_INVALIDDATA;
2094  }
2095  s->aspect_ratio_info = get_bits(&s->gb, 4);
2096  if (s->aspect_ratio_info == 0) {
2097  av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2099  return AVERROR_INVALIDDATA;
2100  }
2101  s->frame_rate_index = get_bits(&s->gb, 4);
2102  if (s->frame_rate_index == 0 || s->frame_rate_index > 13) {
2103  av_log(avctx, AV_LOG_WARNING,
2104  "frame_rate_index %d is invalid\n", s->frame_rate_index);
2105  s->frame_rate_index = 1;
2106  }
2107  s->bit_rate = get_bits(&s->gb, 18) * 400LL;
2108  if (check_marker(s->avctx, &s->gb, "in sequence header") == 0) {
2109  return AVERROR_INVALIDDATA;
2110  }
2111 
2112  s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2113  skip_bits(&s->gb, 1);
2114 
2115  /* get matrix */
2116  if (get_bits1(&s->gb)) {
2118  } else {
2119  for (i = 0; i < 64; i++) {
2120  j = s->idsp.idct_permutation[i];
2122  s->intra_matrix[j] = v;
2123  s->chroma_intra_matrix[j] = v;
2124  }
2125  }
2126  if (get_bits1(&s->gb)) {
2128  } else {
2129  for (i = 0; i < 64; i++) {
2130  int j = s->idsp.idct_permutation[i];
2132  s->inter_matrix[j] = v;
2133  s->chroma_inter_matrix[j] = v;
2134  }
2135  }
2136 
2137  if (show_bits(&s->gb, 23) != 0) {
2138  av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2139  return AVERROR_INVALIDDATA;
2140  }
2141 
2142  s->width = width;
2143  s->height = height;
2144 
2145  /* We set MPEG-2 parameters so that it emulates MPEG-1. */
2146  s->progressive_sequence = 1;
2147  s->progressive_frame = 1;
2149  s->first_field = 0;
2150  s->frame_pred_frame_dct = 1;
2151  s->chroma_format = 1;
2152  s->codec_id =
2154  s->out_format = FMT_MPEG1;
2155  s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2157  s->low_delay = 1;
2158 
2159  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2160  av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%"PRId64", aspect_ratio_info: %d \n",
2162 
2163  return 0;
2164 }
2165 
2167 {
2168  Mpeg1Context *s1 = avctx->priv_data;
2169  MpegEncContext *s = &s1->mpeg_enc_ctx;
2170  int i, v, ret;
2171 
2172  /* start new MPEG-1 context decoding */
2173  s->out_format = FMT_MPEG1;
2174  if (s1->mpeg_enc_ctx_allocated) {
2175  ff_mpv_common_end(s);
2176  s1->mpeg_enc_ctx_allocated = 0;
2177  }
2178  s->width = avctx->coded_width;
2179  s->height = avctx->coded_height;
2180  avctx->has_b_frames = 0; // true?
2181  s->low_delay = 1;
2182 
2183  avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2184  setup_hwaccel_for_pixfmt(avctx);
2185 
2186  ff_mpv_idct_init(s);
2187  if ((ret = ff_mpv_common_init(s)) < 0)
2188  return ret;
2189  s1->mpeg_enc_ctx_allocated = 1;
2190 
2191  for (i = 0; i < 64; i++) {
2192  int j = s->idsp.idct_permutation[i];
2194  s->intra_matrix[j] = v;
2195  s->chroma_intra_matrix[j] = v;
2196 
2198  s->inter_matrix[j] = v;
2199  s->chroma_inter_matrix[j] = v;
2200  }
2201 
2202  s->progressive_sequence = 1;
2203  s->progressive_frame = 1;
2205  s->first_field = 0;
2206  s->frame_pred_frame_dct = 1;
2207  s->chroma_format = 1;
2208  if (s->codec_tag == AV_RL32("BW10")) {
2210  } else {
2211  s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2213  }
2214  s1->save_width = s->width;
2215  s1->save_height = s->height;
2217  return 0;
2218 }
2219 
2221  const uint8_t *p, int buf_size)
2222 {
2223  Mpeg1Context *s1 = avctx->priv_data;
2224 
2225  if (buf_size >= 6 &&
2226  p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2227  p[4] == 3 && (p[5] & 0x40)) {
2228  /* extract A53 Part 4 CC data */
2229  int cc_count = p[5] & 0x1f;
2230  if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2231  av_freep(&s1->a53_caption);
2232  s1->a53_caption_size = cc_count * 3;
2234  if (!s1->a53_caption) {
2235  s1->a53_caption_size = 0;
2236  } else {
2237  memcpy(s1->a53_caption, p + 7, s1->a53_caption_size);
2238  }
2240  }
2241  return 1;
2242  } else if (buf_size >= 2 &&
2243  p[0] == 0x03 && (p[1]&0x7f) == 0x01) {
2244  /* extract SCTE-20 CC data */
2245  GetBitContext gb;
2246  int cc_count = 0;
2247  int i;
2248 
2249  init_get_bits(&gb, p + 2, buf_size - 2);
2250  cc_count = get_bits(&gb, 5);
2251  if (cc_count > 0) {
2252  av_freep(&s1->a53_caption);
2253  s1->a53_caption_size = cc_count * 3;
2255  if (!s1->a53_caption) {
2256  s1->a53_caption_size = 0;
2257  } else {
2258  uint8_t field, cc1, cc2;
2259  uint8_t *cap = s1->a53_caption;
2260  for (i = 0; i < cc_count && get_bits_left(&gb) >= 26; i++) {
2261  skip_bits(&gb, 2); // priority
2262  field = get_bits(&gb, 2);
2263  skip_bits(&gb, 5); // line_offset
2264  cc1 = get_bits(&gb, 8);
2265  cc2 = get_bits(&gb, 8);
2266  skip_bits(&gb, 1); // marker
2267 
2268  if (!field) { // forbidden
2269  cap[0] = cap[1] = cap[2] = 0x00;
2270  } else {
2271  field = (field == 2 ? 1 : 0);
2272  if (!s1->mpeg_enc_ctx.top_field_first) field = !field;
2273  cap[0] = 0x04 | field;
2274  cap[1] = ff_reverse[cc1];
2275  cap[2] = ff_reverse[cc2];
2276  }
2277  cap += 3;
2278  }
2279  }
2281  }
2282  return 1;
2283  } else if (buf_size >= 11 &&
2284  p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2285  /* extract DVD CC data
2286  *
2287  * uint32_t user_data_start_code 0x000001B2 (big endian)
2288  * uint16_t user_identifier 0x4343 "CC"
2289  * uint8_t user_data_type_code 0x01
2290  * uint8_t caption_block_size 0xF8
2291  * uint8_t
2292  * bit 7 caption_odd_field_first 1=odd field (CC1/CC2) first 0=even field (CC3/CC4) first
2293  * bit 6 caption_filler 0
2294  * bit 5:1 caption_block_count number of caption blocks (pairs of caption words = frames). Most DVDs use 15 per start of GOP.
2295  * bit 0 caption_extra_field_added 1=one additional caption word
2296  *
2297  * struct caption_field_block {
2298  * uint8_t
2299  * bit 7:1 caption_filler 0x7F (all 1s)
2300  * bit 0 caption_field_odd 1=odd field (this is CC1/CC2) 0=even field (this is CC3/CC4)
2301  * uint8_t caption_first_byte
2302  * uint8_t caption_second_byte
2303  * } caption_block[(caption_block_count * 2) + caption_extra_field_added];
2304  *
2305  * Some DVDs encode caption data for both fields with caption_field_odd=1. The only way to decode the fields
2306  * correctly is to start on the field indicated by caption_odd_field_first and count between odd/even fields.
2307  * Don't assume that the first caption word is the odd field. There do exist MPEG files in the wild that start
2308  * on the even field. There also exist DVDs in the wild that encode an odd field count and the
2309  * caption_extra_field_added/caption_odd_field_first bits change per packet to allow that. */
2310  int cc_count = 0;
2311  int i;
2312  // There is a caption count field in the data, but it is often
2313  // incorrect. So count the number of captions present.
2314  for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2315  cc_count++;
2316  // Transform the DVD format into A53 Part 4 format
2317  if (cc_count > 0) {
2318  av_freep(&s1->a53_caption);
2319  s1->a53_caption_size = cc_count * 6;
2321  if (!s1->a53_caption) {
2322  s1->a53_caption_size = 0;
2323  } else {
2324  uint8_t field1 = !!(p[4] & 0x80);
2325  uint8_t *cap = s1->a53_caption;
2326  p += 5;
2327  for (i = 0; i < cc_count; i++) {
2328  cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2329  cap[1] = p[1];
2330  cap[2] = p[2];
2331  cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2332  cap[4] = p[4];
2333  cap[5] = p[5];
2334  cap += 6;
2335  p += 6;
2336  }
2337  }
2339  }
2340  return 1;
2341  }
2342  return 0;
2343 }
2344 
2346  const uint8_t *p, int buf_size)
2347 {
2348  Mpeg1Context *s = avctx->priv_data;
2349  const uint8_t *buf_end = p + buf_size;
2350  Mpeg1Context *s1 = avctx->priv_data;
2351 
2352 #if 0
2353  int i;
2354  for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2355  av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2356  }
2357  av_log(avctx, AV_LOG_ERROR, "\n");
2358 #endif
2359 
2360  if (buf_size > 29){
2361  int i;
2362  for(i=0; i<20; i++)
2363  if (!memcmp(p+i, "\0TMPGEXS\0", 9)){
2364  s->tmpgexs= 1;
2365  }
2366  }
2367  /* we parse the DTG active format information */
2368  if (buf_end - p >= 5 &&
2369  p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2370  int flags = p[4];
2371  p += 5;
2372  if (flags & 0x80) {
2373  /* skip event id */
2374  p += 2;
2375  }
2376  if (flags & 0x40) {
2377  if (buf_end - p < 1)
2378  return;
2379  s1->has_afd = 1;
2380  s1->afd = p[0] & 0x0f;
2381  }
2382  } else if (buf_end - p >= 6 &&
2383  p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2384  p[4] == 0x03) { // S3D_video_format_length
2385  // the 0x7F mask ignores the reserved_bit value
2386  const uint8_t S3D_video_format_type = p[5] & 0x7F;
2387 
2388  if (S3D_video_format_type == 0x03 ||
2389  S3D_video_format_type == 0x04 ||
2390  S3D_video_format_type == 0x08 ||
2391  S3D_video_format_type == 0x23) {
2392 
2393  s1->has_stereo3d = 1;
2394 
2395  switch (S3D_video_format_type) {
2396  case 0x03:
2398  break;
2399  case 0x04:
2401  break;
2402  case 0x08:
2404  break;
2405  case 0x23:
2407  break;
2408  }
2409  }
2410  } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2411  return;
2412  }
2413 }
2414 
2415 static void mpeg_decode_gop(AVCodecContext *avctx,
2416  const uint8_t *buf, int buf_size)
2417 {
2418  Mpeg1Context *s1 = avctx->priv_data;
2419  MpegEncContext *s = &s1->mpeg_enc_ctx;
2420  int broken_link;
2421  int64_t tc;
2422 
2423  init_get_bits(&s->gb, buf, buf_size * 8);
2424 
2425  tc = s-> timecode_frame_start = get_bits(&s->gb, 25);
2426 
2427 #if FF_API_PRIVATE_OPT
2429  avctx->timecode_frame_start = tc;
2431 #endif
2432 
2433  s->closed_gop = get_bits1(&s->gb);
2434  /* broken_link indicates that after editing the
2435  * reference frames of the first B-Frames after GOP I-Frame
2436  * are missing (open gop) */
2437  broken_link = get_bits1(&s->gb);
2438 
2439  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2440  char tcbuf[AV_TIMECODE_STR_SIZE];
2443  "GOP (%s) closed_gop=%d broken_link=%d\n",
2444  tcbuf, s->closed_gop, broken_link);
2445  }
2446 }
2447 
2448 static int decode_chunks(AVCodecContext *avctx, AVFrame *picture,
2449  int *got_output, const uint8_t *buf, int buf_size)
2450 {
2451  Mpeg1Context *s = avctx->priv_data;
2453  const uint8_t *buf_ptr = buf;
2454  const uint8_t *buf_end = buf + buf_size;
2455  int ret, input_size;
2456  int last_code = 0, skip_frame = 0;
2457  int picture_start_code_seen = 0;
2458 
2459  for (;;) {
2460  /* find next start code */
2461  uint32_t start_code = -1;
2462  buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2463  if (start_code > 0x1ff) {
2464  if (!skip_frame) {
2465  if (HAVE_THREADS &&
2466  (avctx->active_thread_type & FF_THREAD_SLICE) &&
2467  !avctx->hwaccel) {
2468  int i;
2469  av_assert0(avctx->thread_count > 1);
2470 
2471  avctx->execute(avctx, slice_decode_thread,
2472  &s2->thread_context[0], NULL,
2473  s->slice_count, sizeof(void *));
2474  for (i = 0; i < s->slice_count; i++)
2475  s2->er.error_count += s2->thread_context[i]->er.error_count;
2476  }
2477 
2478  ret = slice_end(avctx, picture);
2479  if (ret < 0)
2480  return ret;
2481  else if (ret) {
2482  // FIXME: merge with the stuff in mpeg_decode_slice
2483  if (s2->last_picture_ptr || s2->low_delay || s2->pict_type == AV_PICTURE_TYPE_B)
2484  *got_output = 1;
2485  }
2486  }
2487  s2->pict_type = 0;
2488 
2489  if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2490  return AVERROR_INVALIDDATA;
2491 
2492  return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2493  }
2494 
2495  input_size = buf_end - buf_ptr;
2496 
2497  if (avctx->debug & FF_DEBUG_STARTCODE)
2498  av_log(avctx, AV_LOG_DEBUG, "%3"PRIX32" at %"PTRDIFF_SPECIFIER" left %d\n",
2499  start_code, buf_ptr - buf, input_size);
2500 
2501  /* prepare data for next start code */
2502  switch (start_code) {
2503  case SEQ_START_CODE:
2504  if (last_code == 0) {
2505  mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2506  if (buf != avctx->extradata)
2507  s->sync = 1;
2508  } else {
2509  av_log(avctx, AV_LOG_ERROR,
2510  "ignoring SEQ_START_CODE after %X\n", last_code);
2511  if (avctx->err_recognition & AV_EF_EXPLODE)
2512  return AVERROR_INVALIDDATA;
2513  }
2514  break;
2515 
2516  case PICTURE_START_CODE:
2517  if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2518  /* If it's a frame picture, there can't be more than one picture header.
2519  Yet, it does happen and we need to handle it. */
2520  av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2521  break;
2522  }
2523  picture_start_code_seen = 1;
2524 
2525  if (s2->width <= 0 || s2->height <= 0) {
2526  av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2527  s2->width, s2->height);
2528  return AVERROR_INVALIDDATA;
2529  }
2530 
2531  if (s->tmpgexs){
2532  s2->intra_dc_precision= 3;
2533  s2->intra_matrix[0]= 1;
2534  }
2535  if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2536  !avctx->hwaccel && s->slice_count) {
2537  int i;
2538 
2539  avctx->execute(avctx, slice_decode_thread,
2540  s2->thread_context, NULL,
2541  s->slice_count, sizeof(void *));
2542  for (i = 0; i < s->slice_count; i++)
2543  s2->er.error_count += s2->thread_context[i]->er.error_count;
2544  s->slice_count = 0;
2545  }
2546  if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2547  ret = mpeg_decode_postinit(avctx);
2548  if (ret < 0) {
2549  av_log(avctx, AV_LOG_ERROR,
2550  "mpeg_decode_postinit() failure\n");
2551  return ret;
2552  }
2553 
2554  /* We have a complete image: we try to decompress it. */
2555  if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2556  s2->pict_type = 0;
2557  s->first_slice = 1;
2558  last_code = PICTURE_START_CODE;
2559  } else {
2560  av_log(avctx, AV_LOG_ERROR,
2561  "ignoring pic after %X\n", last_code);
2562  if (avctx->err_recognition & AV_EF_EXPLODE)
2563  return AVERROR_INVALIDDATA;
2564  }
2565  break;
2566  case EXT_START_CODE:
2567  init_get_bits(&s2->gb, buf_ptr, input_size * 8);
2568 
2569  switch (get_bits(&s2->gb, 4)) {
2570  case 0x1:
2571  if (last_code == 0) {
2573  } else {
2574  av_log(avctx, AV_LOG_ERROR,
2575  "ignoring seq ext after %X\n", last_code);
2576  if (avctx->err_recognition & AV_EF_EXPLODE)
2577  return AVERROR_INVALIDDATA;
2578  }
2579  break;
2580  case 0x2:
2582  break;
2583  case 0x3:
2585  break;
2586  case 0x7:
2588  break;
2589  case 0x8:
2590  if (last_code == PICTURE_START_CODE) {
2592  } else {
2593  av_log(avctx, AV_LOG_ERROR,
2594  "ignoring pic cod ext after %X\n", last_code);
2595  if (avctx->err_recognition & AV_EF_EXPLODE)
2596  return AVERROR_INVALIDDATA;
2597  }
2598  break;
2599  }
2600  break;
2601  case USER_START_CODE:
2602  mpeg_decode_user_data(avctx, buf_ptr, input_size);
2603  break;
2604  case GOP_START_CODE:
2605  if (last_code == 0) {
2606  s2->first_field = 0;
2607  mpeg_decode_gop(avctx, buf_ptr, input_size);
2608  s->sync = 1;
2609  } else {
2610  av_log(avctx, AV_LOG_ERROR,
2611  "ignoring GOP_START_CODE after %X\n", last_code);
2612  if (avctx->err_recognition & AV_EF_EXPLODE)
2613  return AVERROR_INVALIDDATA;
2614  }
2615  break;
2616  default:
2617  if (start_code >= SLICE_MIN_START_CODE &&
2618  start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2619  if (s2->progressive_sequence && !s2->progressive_frame) {
2620  s2->progressive_frame = 1;
2621  av_log(s2->avctx, AV_LOG_ERROR,
2622  "interlaced frame in progressive sequence, ignoring\n");
2623  }
2624 
2625  if (s2->picture_structure == 0 ||
2627  av_log(s2->avctx, AV_LOG_ERROR,
2628  "picture_structure %d invalid, ignoring\n",
2629  s2->picture_structure);
2631  }
2632 
2634  av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2635 
2636  if (s2->picture_structure == PICT_FRAME) {
2637  s2->first_field = 0;
2638  s2->v_edge_pos = 16 * s2->mb_height;
2639  } else {
2640  s2->first_field ^= 1;
2641  s2->v_edge_pos = 8 * s2->mb_height;
2642  memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2643  }
2644  }
2645  if (start_code >= SLICE_MIN_START_CODE &&
2646  start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2647  const int field_pic = s2->picture_structure != PICT_FRAME;
2648  int mb_y = start_code - SLICE_MIN_START_CODE;
2649  last_code = SLICE_MIN_START_CODE;
2650  if (s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2651  mb_y += (*buf_ptr&0xE0)<<2;
2652 
2653  mb_y <<= field_pic;
2655  mb_y++;
2656 
2657  if (buf_end - buf_ptr < 2) {
2658  av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2659  return AVERROR_INVALIDDATA;
2660  }
2661 
2662  if (mb_y >= s2->mb_height) {
2663  av_log(s2->avctx, AV_LOG_ERROR,
2664  "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2665  return AVERROR_INVALIDDATA;
2666  }
2667 
2668  if (!s2->last_picture_ptr) {
2669  /* Skip B-frames if we do not have reference frames and
2670  * GOP is not closed. */
2671  if (s2->pict_type == AV_PICTURE_TYPE_B) {
2672  if (!s2->closed_gop) {
2673  skip_frame = 1;
2674  av_log(s2->avctx, AV_LOG_DEBUG,
2675  "Skipping B slice due to open GOP\n");
2676  break;
2677  }
2678  }
2679  }
2681  s->sync = 1;
2682  if (!s2->next_picture_ptr) {
2683  /* Skip P-frames if we do not have a reference frame or
2684  * we have an invalid header. */
2685  if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2686  skip_frame = 1;
2687  av_log(s2->avctx, AV_LOG_DEBUG,
2688  "Skipping P slice due to !sync\n");
2689  break;
2690  }
2691  }
2692  if ((avctx->skip_frame >= AVDISCARD_NONREF &&
2693  s2->pict_type == AV_PICTURE_TYPE_B) ||
2694  (avctx->skip_frame >= AVDISCARD_NONKEY &&
2695  s2->pict_type != AV_PICTURE_TYPE_I) ||
2696  avctx->skip_frame >= AVDISCARD_ALL) {
2697  skip_frame = 1;
2698  break;
2699  }
2700 
2701  if (!s->mpeg_enc_ctx_allocated)
2702  break;
2703 
2704  if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2705  if (mb_y < avctx->skip_top ||
2706  mb_y >= s2->mb_height - avctx->skip_bottom)
2707  break;
2708  }
2709 
2710  if (!s2->pict_type) {
2711  av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2712  if (avctx->err_recognition & AV_EF_EXPLODE)
2713  return AVERROR_INVALIDDATA;
2714  break;
2715  }
2716 
2717  if (s->first_slice) {
2718  skip_frame = 0;
2719  s->first_slice = 0;
2720  if ((ret = mpeg_field_start(s2, buf, buf_size)) < 0)
2721  return ret;
2722  }
2723  if (!s2->current_picture_ptr) {
2724  av_log(avctx, AV_LOG_ERROR,
2725  "current_picture not initialized\n");
2726  return AVERROR_INVALIDDATA;
2727  }
2728 
2729  if (HAVE_THREADS &&
2730  (avctx->active_thread_type & FF_THREAD_SLICE) &&
2731  !avctx->hwaccel) {
2732  int threshold = (s2->mb_height * s->slice_count +
2733  s2->slice_context_count / 2) /
2734  s2->slice_context_count;
2735  av_assert0(avctx->thread_count > 1);
2736  if (threshold <= mb_y) {
2737  MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2738 
2739  thread_context->start_mb_y = mb_y;
2740  thread_context->end_mb_y = s2->mb_height;
2741  if (s->slice_count) {
2742  s2->thread_context[s->slice_count - 1]->end_mb_y = mb_y;
2743  ret = ff_update_duplicate_context(thread_context, s2);
2744  if (ret < 0)
2745  return ret;
2746  }
2747  init_get_bits(&thread_context->gb, buf_ptr, input_size * 8);
2748  s->slice_count++;
2749  }
2750  buf_ptr += 2; // FIXME add minimum number of bytes per slice
2751  } else {
2752  ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2753  emms_c();
2754 
2755  if (ret < 0) {
2756  if (avctx->err_recognition & AV_EF_EXPLODE)
2757  return ret;
2758  if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2759  ff_er_add_slice(&s2->er, s2->resync_mb_x,
2760  s2->resync_mb_y, s2->mb_x, s2->mb_y,
2762  } else {
2763  ff_er_add_slice(&s2->er, s2->resync_mb_x,
2764  s2->resync_mb_y, s2->mb_x - 1, s2->mb_y,
2766  }
2767  }
2768  }
2769  break;
2770  }
2771  }
2772 }
2773 
2774 static int mpeg_decode_frame(AVCodecContext *avctx, void *data,
2775  int *got_output, AVPacket *avpkt)
2776 {
2777  const uint8_t *buf = avpkt->data;
2778  int ret;
2779  int buf_size = avpkt->size;
2780  Mpeg1Context *s = avctx->priv_data;
2781  AVFrame *picture = data;
2783 
2784  if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2785  /* special case for last picture */
2786  if (s2->low_delay == 0 && s2->next_picture_ptr) {
2787  int ret = av_frame_ref(picture, s2->next_picture_ptr->f);
2788  if (ret < 0)
2789  return ret;
2790 
2791  s2->next_picture_ptr = NULL;
2792 
2793  *got_output = 1;
2794  }
2795  return buf_size;
2796  }
2797 
2798  if (s2->avctx->flags & AV_CODEC_FLAG_TRUNCATED) {
2799  int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf,
2800  buf_size, NULL);
2801 
2802  if (ff_combine_frame(&s2->parse_context, next,
2803  (const uint8_t **) &buf, &buf_size) < 0)
2804  return buf_size;
2805  }
2806 
2807  s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2808  if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2809  || s2->codec_tag == AV_RL32("BW10")
2810  ))
2811  vcr2_init_sequence(avctx);
2812 
2813  s->slice_count = 0;
2814 
2815  if (avctx->extradata && !s->extradata_decoded) {
2816  ret = decode_chunks(avctx, picture, got_output,
2817  avctx->extradata, avctx->extradata_size);
2818  if (*got_output) {
2819  av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2820  av_frame_unref(picture);
2821  *got_output = 0;
2822  }
2823  s->extradata_decoded = 1;
2824  if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2825  s2->current_picture_ptr = NULL;
2826  return ret;
2827  }
2828  }
2829 
2830  ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2831  if (ret<0 || *got_output) {
2832  s2->current_picture_ptr = NULL;
2833 
2834  if (s2->timecode_frame_start != -1 && *got_output) {
2835  AVFrameSideData *tcside = av_frame_new_side_data(picture,
2837  sizeof(int64_t));
2838  if (!tcside)
2839  return AVERROR(ENOMEM);
2840  memcpy(tcside->data, &s2->timecode_frame_start, sizeof(int64_t));
2841 
2842  s2->timecode_frame_start = -1;
2843  }
2844  }
2845 
2846  return ret;
2847 }
2848 
2849 static void flush(AVCodecContext *avctx)
2850 {
2851  Mpeg1Context *s = avctx->priv_data;
2852 
2853  s->sync = 0;
2854 
2855  ff_mpeg_flush(avctx);
2856 }
2857 
2859 {
2860  Mpeg1Context *s = avctx->priv_data;
2861 
2862  if (s->mpeg_enc_ctx_allocated)
2864  av_freep(&s->a53_caption);
2865  return 0;
2866 }
2867 
2869  .name = "mpeg1video",
2870  .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2871  .type = AVMEDIA_TYPE_VIDEO,
2872  .id = AV_CODEC_ID_MPEG1VIDEO,
2873  .priv_data_size = sizeof(Mpeg1Context),
2875  .close = mpeg_decode_end,
2880  .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2881  .flush = flush,
2882  .max_lowres = 3,
2883  .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context),
2884  .hw_configs = (const AVCodecHWConfigInternal*[]) {
2885 #if CONFIG_MPEG1_NVDEC_HWACCEL
2886  HWACCEL_NVDEC(mpeg1),
2887 #endif
2888 #if CONFIG_MPEG1_VDPAU_HWACCEL
2889  HWACCEL_VDPAU(mpeg1),
2890 #endif
2891 #if CONFIG_MPEG1_VIDEOTOOLBOX_HWACCEL
2892  HWACCEL_VIDEOTOOLBOX(mpeg1),
2893 #endif
2894 #if CONFIG_MPEG1_XVMC_HWACCEL
2895  HWACCEL_XVMC(mpeg1),
2896 #endif
2897  NULL
2898  },
2899 };
2900 
2902  .name = "mpeg2video",
2903  .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2904  .type = AVMEDIA_TYPE_VIDEO,
2905  .id = AV_CODEC_ID_MPEG2VIDEO,
2906  .priv_data_size = sizeof(Mpeg1Context),
2908  .close = mpeg_decode_end,
2913  .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2914  .flush = flush,
2915  .max_lowres = 3,
2917  .hw_configs = (const AVCodecHWConfigInternal*[]) {
2918 #if CONFIG_MPEG2_DXVA2_HWACCEL
2919  HWACCEL_DXVA2(mpeg2),
2920 #endif
2921 #if CONFIG_MPEG2_D3D11VA_HWACCEL
2922  HWACCEL_D3D11VA(mpeg2),
2923 #endif
2924 #if CONFIG_MPEG2_D3D11VA2_HWACCEL
2925  HWACCEL_D3D11VA2(mpeg2),
2926 #endif
2927 #if CONFIG_MPEG2_NVDEC_HWACCEL
2928  HWACCEL_NVDEC(mpeg2),
2929 #endif
2930 #if CONFIG_MPEG2_VAAPI_HWACCEL
2931  HWACCEL_VAAPI(mpeg2),
2932 #endif
2933 #if CONFIG_MPEG2_VDPAU_HWACCEL
2934  HWACCEL_VDPAU(mpeg2),
2935 #endif
2936 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
2937  HWACCEL_VIDEOTOOLBOX(mpeg2),
2938 #endif
2939 #if CONFIG_MPEG2_XVMC_HWACCEL
2940  HWACCEL_XVMC(mpeg2),
2941 #endif
2942  NULL
2943  },
2944 };
2945 
2946 //legacy decoder
2948  .name = "mpegvideo",
2949  .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2950  .type = AVMEDIA_TYPE_VIDEO,
2951  .id = AV_CODEC_ID_MPEG2VIDEO,
2952  .priv_data_size = sizeof(Mpeg1Context),
2954  .close = mpeg_decode_end,
2957  .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2958  .flush = flush,
2959  .max_lowres = 3,
2960 };
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:587
#define AV_EF_AGGRESSIVE
consider things that a sane encoder should not do as an error
Definition: avcodec.h:2674
#define ff_tlog(ctx,...)
Definition: internal.h:75
IDCTDSPContext idsp
Definition: mpegvideo.h:230
#define NULL
Definition: coverity.c:32
const struct AVCodec * codec
Definition: avcodec.h:1542
AVRational framerate
Definition: avcodec.h:3056
const char const char void * val
Definition: avisynth_c.h:771
discard all frames except keyframes
Definition: avcodec.h:802
int8_t * ref_index[2]
Definition: mpegpicture.h:62
void ff_init_block_index(MpegEncContext *s)
Definition: mpegvideo.c:2279
int64_t timecode_frame_start
GOP timecode frame start number, in non drop frame format.
Definition: mpegvideo.h:462
int aspect_ratio_info
Definition: mpegvideo.h:402
int picture_number
Definition: mpegvideo.h:127
#define MB_TYPE_L1
Definition: mpegutils.h:68
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define SLICE_FLAG_ALLOW_FIELD
allow draw_horiz_band() with field slices (MPEG-2 field pics)
Definition: avcodec.h:2013
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:533
#define MAX_INDEX
Definition: mpeg12dec.c:127
This structure describes decoded (raw) audio or video data.
Definition: frame.h:226
static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm, const uint8_t *new_perm)
Definition: mpeg12dec.c:1108
#define HWACCEL_D3D11VA2(codec)
Definition: hwaccel.h:69
int start_mb_y
start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y) ...
Definition: mpegvideo.h:153
#define MV_TYPE_FIELD
2 vectors, one per field
Definition: mpegvideo.h:269
#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:278
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:1721
float re
Definition: fft.c:82
static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
Definition: mpeg12dec.c:1436
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
misc image utilities
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:381
#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:1583
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
Definition: utils.c:104
uint8_t afd
Definition: mpeg12dec.c:62
hardware decoding through Videotoolbox
Definition: pixfmt.h:282
int end_mb_y
end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y) ...
Definition: mpegvideo.h:154
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
uint8_t * a53_caption
Definition: mpeg12dec.c:60
uint16_t chroma_intra_matrix[64]
Definition: mpegvideo.h:301
const uint8_t ff_reverse[256]
Definition: reverse.c:23
int height
Definition: avcodec.h:1093
int v_edge_pos
horizontal / vertical position of the right/bottom edge (pixel replication)
Definition: mpegvideo.h:132
uint16_t chroma_inter_matrix[64]
Definition: mpegvideo.h:303
void ff_er_frame_end(ERContext *s)
static int mpeg2_fast_decode_block_non_intra(MpegEncContext *s, int16_t *block, int n)
Changing this would eat up any speed benefits it has.
Definition: mpeg12dec.c:401
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: avcodec.h:2164
static int check_marker(void *logctx, GetBitContext *s, const char *msg)
Definition: get_bits.h:597
int num
Numerator.
Definition: rational.h:59
int repeat_pict
When decoding, this signals how much the picture must be delayed.
Definition: frame.h:368
Views are next to each other, but when upscaling apply a checkerboard pattern.
Definition: stereo3d.h:117
int size
Definition: avcodec.h:1446
enum AVCodecID codec_id
Definition: mpegvideo.h:112
#define AV_EF_COMPLIANT
consider all spec non compliances as errors
Definition: avcodec.h:2673
static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
Definition: mpeg12dec.c:1531
const uint8_t * buffer
Definition: get_bits.h:62
void ff_mpeg1_clean_buffers(MpegEncContext *s)
Definition: mpeg12.c:115
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel...
Definition: avcodec.h:1912
#define MB_TYPE_INTRA
Definition: mpegutils.h:73
AVCodec ff_mpeg1video_decoder
Definition: mpeg12dec.c:2868
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:1743
#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:1052
#define AV_EF_BITSTREAM
detect bitstream specification deviations
Definition: avcodec.h:2667
mpegvideo header.
#define HAS_CBP(a)
Definition: mpegutils.h:101
discard all
Definition: avcodec.h:803
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:2415
#define SLICE_MIN_START_CODE
Definition: mpegvideo.h:71
const struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:2690
int profile
profile
Definition: avcodec.h:2859
AVCodec.
Definition: avcodec.h:3424
static int get_dmv(MpegEncContext *s)
Definition: mpeg12dec.c:641
int qscale
QP.
Definition: mpegvideo.h:204
RLTable.
Definition: rl.h:39
static int get_sbits(GetBitContext *s, int n)
Definition: get_bits.h:361
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:42
#define CONFIG_MPEG1_XVMC_HWACCEL
Definition: config.h:1448
int chroma_x_shift
Definition: mpegvideo.h:485
int encoding
true if we are encoding (vs decoding)
Definition: mpegvideo.h:114
int field_select[2][2]
Definition: mpegvideo.h:277
Macro definitions for various function/variable attributes.
enum AVDiscard skip_frame
Skip decoding for selected frames.
Definition: avcodec.h:2991
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:993
#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:2272
#define MBINCR_VLC_BITS
Definition: mpeg12vlc.h:37
static const uint32_t ptype2mb_type[7]
Definition: mpeg12dec.c:76
#define SLICE_MAX_START_CODE
Definition: avs2_parser.c:24
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:104
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:2615
#define AV_RB32
Definition: intreadwrite.h:130
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
const float ff_mpeg1_aspect[16]
Definition: mpeg12data.c:374
Multithreading support functions.
#define AV_CODEC_FLAG_LOW_DELAY
Force low delay.
Definition: avcodec.h:887
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:443
#define emms_c()
Definition: internal.h:55
static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra)
Definition: mpeg12dec.c:1494
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1634
int full_pel[2]
Definition: mpegvideo.h:489
int interlaced_dct
Definition: mpegvideo.h:490
#define MB_TYPE_16x16
Definition: mpegutils.h:54
static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
Definition: mpeg12dec.c:1171
static int mpeg1_fast_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
Changing this would eat up any speed benefits it has.
Definition: mpeg12dec.c:226
Picture current_picture
copy of the current picture structure.
Definition: mpegvideo.h:180
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:463
int repeat_first_field
Definition: mpegvideo.h:479
void ff_xvmc_init_block(MpegEncContext *s)
Initialize the block field of the MpegEncContext pointer passed as parameter after making sure that t...
const char data[16]
Definition: mxf.c:91
Structure to hold side data for an AVFrame.
Definition: frame.h:188
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:1445
#define HWACCEL_DXVA2(codec)
Definition: hwaccel.h:67
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:219
void ff_xvmc_pack_pblocks(MpegEncContext *s, int cbp)
Fill individual block pointers, so there are no gaps in the data_block array in case not all blocks i...
#define ER_MV_END
#define ff_dlog(a,...)
av_cold void ff_mpv_idct_init(MpegEncContext *s)
Definition: mpegvideo.c:330
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:129
int lowres
low resolution decoding, 1-> 1/2 size, 2->1/4 size
Definition: avcodec.h:2765
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:120
void ff_thread_finish_setup(AVCodecContext *avctx)
If the codec defines update_thread_context(), call this when they are ready for the next thread to st...
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:870
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:2171
#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:2730
#define MB_TYPE_QUANT
Definition: mpegutils.h:70
static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
Definition: mpeg12dec.c:1192
Libavcodec version macros.
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:814
enum AVCodecID id
Definition: avcodec.h:3438
int slice_context_count
number of used thread_contexts
Definition: mpegvideo.h:156
int extradata_decoded
Definition: mpeg12dec.c:71
#define UPDATE_CACHE(name, gb)
Definition: get_bits.h:178
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:258
#define FF_IDCT_NONE
Definition: avcodec.h:2742
#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:1823
int last_dc[3]
last DC values for MPEG-1
Definition: mpegvideo.h:185
#define s2
Definition: regdef.h:39
void ff_er_add_slice(ERContext *s, int startx, int starty, int endx, int endy, int status)
Add a slice.
#define MT_FIELD
Definition: mpeg12dec.c:650
#define PTRDIFF_SPECIFIER
Definition: internal.h:263
int mb_skipped
MUST BE SET only during DECODING.
Definition: mpegvideo.h:195
int chroma_y_shift
Definition: mpegvideo.h:486
int ff_combine_frame(ParseContext *pc, int next, const uint8_t **buf, int *buf_size)
Combine the (truncated) bitstream to a complete frame.
Definition: parser.c:234
#define AVERROR(e)
Definition: error.h:43
static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
Definition: mpeg12dec.c:1393
void(* clear_blocks)(int16_t *blocks)
Definition: blockdsp.h:37
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
ERContext er
Definition: mpegvideo.h:565
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:2804
AVCodec ff_mpegvideo_decoder
Definition: mpeg12dec.c:2947
#define MB_TYPE_CBP
Definition: mpegutils.h:71
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
ATSC A53 Part 4 Closed Captions.
Definition: frame.h:58
const char * arg
Definition: jacosubdec.c:66
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1613
#define wrap(func)
Definition: neontest.h:65
#define SEQ_END_CODE
Definition: mpegvideo.h:67
#define PICT_TOP_FIELD
Definition: mpegutils.h:37
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
const char * name
Name of the codec implementation.
Definition: avcodec.h:3431
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:1092
int low_delay
no reordering needed / has no B-frames
Definition: mpegvideo.h:406
static void mpeg_decode_user_data(AVCodecContext *avctx, const uint8_t *p, int buf_size)
Definition: mpeg12dec.c:2345
GetBitContext gb
Definition: mpegvideo.h:448
The GOP timecode in 25 bit timecode format.
Definition: frame.h:124
#define CLOSE_READER(name, gb)
Definition: get_bits.h:149
void ff_mpv_common_end(MpegEncContext *s)
Definition: mpegvideo.c:1138
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:2491
#define DECODE_SLICE_ERROR
Definition: mpeg12dec.c:1689
#define DECODE_SLICE_OK
Definition: mpeg12dec.c:1690
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
void ff_mpeg_flush(AVCodecContext *avctx)
Definition: mpegvideo.c:2312
XVideo Motion Acceleration via common packet passing.
Definition: pixfmt.h:273
#define SKIP_BITS(name, gb, num)
Definition: get_bits.h:193
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:227
int resync_mb_x
x position of last resync marker
Definition: mpegvideo.h:356
int rc_buffer_size
decoder bitstream buffer size
Definition: avcodec.h:2392
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:1590
int intra_vlc_format
Definition: mpegvideo.h:469
const AVProfile ff_mpeg2_video_profiles[]
Definition: profiles.c:94
#define AV_CODEC_CAP_DRAW_HORIZ_BAND
Decoder can use draw_horiz_band callback.
Definition: avcodec.h:962
static int mpeg2_decode_block_non_intra(MpegEncContext *s, int16_t *block, int n)
Definition: mpeg12dec.c:311
int ff_mpv_export_qp_table(MpegEncContext *s, AVFrame *f, Picture *p, int qp_type)
Definition: mpegvideo.c:1451
int progressive_frame
Definition: mpegvideo.h:488
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:309
#define MB_PAT_VLC_BITS
Definition: mpeg12vlc.h:38
int top_field_first
Definition: mpegvideo.h:465
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:2658
#define FF_THREAD_FRAME
Decode more than one frame at once.
Definition: avcodec.h:2796
#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:2166
#define width
uint8_t * mbskip_table
used to avoid copy if macroblock skipped (for black regions for example) and used for B-frame encodin...
Definition: mpegvideo.h:196
int idct_algo
IDCT algorithm, see FF_IDCT_* below.
Definition: avcodec.h:2729
uint8_t w
Definition: llviddspenc.c:38
int16_t(*[2] motion_val)[2]
Definition: mpegpicture.h:53
Picture * current_picture_ptr
pointer to the current picture
Definition: mpegvideo.h:184
void ff_mpeg_er_frame_start(MpegEncContext *s)
Definition: mpeg_er.c:46
#define GET_RL_VLC(level, run, name, gb, table, bits, max_depth, need_update)
Definition: get_bits.h:703
#define ER_DC_END
static int mpeg_decode_a53_cc(AVCodecContext *avctx, const uint8_t *p, int buf_size)
Definition: mpeg12dec.c:2220
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:535
int alternate_scan
Definition: mpegvideo.h:470
int save_height
Definition: mpeg12dec.c:66
#define MB_BTYPE_VLC_BITS
Definition: mpeg12vlc.h:40
#define GOP_START_CODE
Definition: mpegvideo.h:69
int32_t
AVFormatContext * ctx
Definition: movenc.c:48
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:2143
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:443
int a53_caption_size
Definition: mpeg12dec.c:61
#define s(width, name)
Definition: cbs_vp9.c:257
#define FF_THREAD_SLICE
Decode more than one part of a single frame at once.
Definition: avcodec.h:2797
int level
level
Definition: avcodec.h:2969
#define LAST_SKIP_BITS(name, gb, num)
Definition: get_bits.h:199
static av_cold int mpeg_decode_end(AVCodecContext *avctx)
Definition: mpeg12dec.c:2858
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:762
static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
Definition: mpeg12dec.c:1517
#define AV_RL32
Definition: intreadwrite.h:146
int16_t(*[12] pblocks)[64]
Definition: mpegvideo.h:505
#define CONFIG_GRAY
Definition: config.h:530
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:86
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2669
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:1665
int mpeg_f_code[2][2]
Definition: mpegvideo.h:457
#define EXT_START_CODE
Definition: cavs.h:33
int mpeg_enc_ctx_allocated
Definition: mpeg12dec.c:55
#define check_scantable_index(ctx, x)
Definition: mpeg12dec.c:128
#define MB_TYPE_INTERLACED
Definition: mpegutils.h:58
if(ret< 0)
Definition: vf_mcdeint.c:279
HW acceleration through CUDA.
Definition: pixfmt.h:235
int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
Definition: mpegvideo.c:495
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:211
void ff_mpv_decode_defaults(MpegEncContext *s)
Set the given MpegEncContext to defaults for decoding.
Definition: mpegvideo.c:669
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:2785
static int mpeg1_decode_sequence(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
Definition: mpeg12dec.c:2077
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:491
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:1028
int save_width
Definition: mpeg12dec.c:66
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:266
#define MV_VLC_BITS
Definition: ituh263dec.c:54
int frame_pred_frame_dct
Definition: mpegvideo.h:464
static int mpeg2_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
Definition: mpeg12dec.c:473
enum AVStereo3DType type
How views are packed within the video.
Definition: stereo3d.h:180
uint16_t inter_matrix[64]
Definition: mpegvideo.h:302
uint8_t * buffer
Definition: parser.h:29
static enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[]
Definition: mpeg12dec.c:1134
int concealment_motion_vectors
Definition: mpegvideo.h:466
struct MpegEncContext * thread_context[MAX_THREADS]
Definition: mpegvideo.h:155
Libavcodec external API header.
Views are on top of each other.
Definition: stereo3d.h:79
int(* end_frame)(AVCodecContext *avctx)
Called at the end of each frame or field picture.
Definition: avcodec.h:3693
AVRational frame_rate_ext
Definition: mpeg12dec.c:67
enum AVCodecID codec_id
Definition: avcodec.h:1543
BlockDSPContext bdsp
Definition: mpegvideo.h:226
static int mpeg2_fast_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
Changing this would eat up any speed benefits it has.
Definition: mpeg12dec.c:562
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:257
#define AV_CODEC_FLAG2_FAST
Allow non spec compliant speedup tricks.
Definition: avcodec.h:910
int debug
debug
Definition: avcodec.h:2614
#define MB_PTYPE_VLC_BITS
Definition: mpeg12vlc.h:39
main external API structure.
Definition: avcodec.h:1533
ScanTable intra_scantable
Definition: mpegvideo.h:91
#define USER_START_CODE
Definition: cavs.h:34
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:100
#define IS_QUANT(a)
Definition: mpegutils.h:95
MPEG-1/2 tables.
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> (&#39;D&#39;<<24) + (&#39;C&#39;<<16) + (&#39;B&#39;<<8) + &#39;A&#39;).
Definition: avcodec.h:1558
#define OPEN_READER(name, gb)
Definition: get_bits.h:138
uint8_t * data
Definition: frame.h:190
#define MV_TYPE_16X8
2 vectors, one per 16x8 block
Definition: mpegvideo.h:268
int chroma_420_type
Definition: mpegvideo.h:480
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:1698
void ff_print_debug_info(MpegEncContext *s, Picture *p, AVFrame *pict)
Definition: mpegvideo.c:1444
int extradata_size
Definition: avcodec.h:1635
int progressive_sequence
Definition: mpegvideo.h:456
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:487
static void skip_bits1(GetBitContext *s)
Definition: get_bits.h:523
int slice_flags
slice flags
Definition: avcodec.h:2011
int coded_height
Definition: avcodec.h:1721
#define FF_CODEC_PROPERTY_CLOSED_CAPTIONS
Definition: avcodec.h:3180
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:460
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:722
int closed_gop
MPEG1/2 GOP is closed.
Definition: mpegvideo.h:211
int has_stereo3d
Definition: mpeg12dec.c:59
VLC ff_mb_ptype_vlc
Definition: mpeg12.c:133
unsigned int avpriv_toupper4(unsigned int x)
Definition: utils.c:1859
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:2157
Rational number (pair of numerator and denominator).
Definition: rational.h:58
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:2150
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:197
static enum AVPixelFormat mpeg12_pixfmt_list_422[]
Definition: mpeg12dec.c:1161
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:615
#define GET_CACHE(name, gb)
Definition: get_bits.h:215
const uint16_t ff_mpeg1_default_intra_matrix[256]
Definition: mpeg12data.c:30
int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s)
Find the end of the current frame in the bitstream.
Definition: mpeg12.c:178
int save_progressive_seq
Definition: mpeg12dec.c:66
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:98
#define MT_DMV
Definition: mpeg12dec.c:653
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:1212
#define ER_DC_ERROR
#define MB_TYPE_SKIP
Definition: mpegutils.h:62
HW decoding through DXVA2, Picture.data[3] contains a LPDIRECT3DSURFACE9 pointer. ...
Definition: pixfmt.h:137
static int mpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_output, AVPacket *avpkt)
Definition: mpeg12dec.c:2774
#define MV_DIR_FORWARD
Definition: mpegvideo.h:262
static int decode_chunks(AVCodecContext *avctx, AVFrame *picture, int *got_output, const uint8_t *buf, int buf_size)
Definition: mpeg12dec.c:2448
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:212
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:266
av_cold void ff_mpeg12_common_init(MpegEncContext *s)
Definition: mpeg12.c:107
#define AV_CODEC_CAP_TRUNCATED
Definition: avcodec.h:969
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> dc
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:130
#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:553
int skip_bottom
Number of macroblock rows at the bottom which are skipped.
Definition: avcodec.h:2069
#define flags(name, subs,...)
Definition: cbs_av1.c:610
int(* decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
Callback for each slice.
Definition: avcodec.h:3682
Pan Scan area.
Definition: avcodec.h:1079
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:240
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:276
#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:131
Hardware surfaces for Direct3D11.
Definition: pixfmt.h:313
the normal 219*2^(n-8) "MPEG" YUV ranges
Definition: pixfmt.h:511
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:3654
MpegEncContext.
Definition: mpegvideo.h:81
Picture * next_picture_ptr
pointer to the next picture (for bidir pred)
Definition: mpegvideo.h:183
struct AVCodecContext * avctx
Definition: mpegvideo.h:98
#define SHOW_SBITS(name, gb, num)
Definition: get_bits.h:212
static int av_cmp_q(AVRational a, AVRational b)
Compare two rationals.
Definition: rational.h:89
int ff_mpeg1_decode_block_intra(GetBitContext *gb, const uint16_t *quant_matrix, uint8_t *const scantable, int last_dc[3], int16_t *block, int index, int qscale)
Definition: mpeg12.c:240
discard all non reference
Definition: avcodec.h:799
const AVRational ff_mpeg2_aspect[16]
Definition: mpeg12data.c:395
static enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[]
Definition: mpeg12dec.c:1120
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
Y , 8bpp.
Definition: pixfmt.h:74
#define MB_TYPE_L0L1
Definition: mpegutils.h:69
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
common internal api header.
int mb_stride
mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11 ...
Definition: mpegvideo.h:130
void ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx)
Definition: mpegvideo.c:674
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:2901
#define TEX_VLC_BITS
Definition: dv.h:96
static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
Definition: mpeg12dec.c:655
uint8_t * dest[3]
Definition: mpegvideo.h:295
static double c[64]
const uint8_t * buffer_end
Definition: get_bits.h:62
static void flush(AVCodecContext *avctx)
Definition: mpeg12dec.c:2849
VLC ff_mbincr_vlc
Definition: mpeg12.c:132
Picture * last_picture_ptr
pointer to the previous picture.
Definition: mpegvideo.h:182
Bi-dir predicted.
Definition: avutil.h:276
Stereoscopic video.
static int mpeg1_decode_picture(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
Definition: mpeg12dec.c:1346
unsigned properties
Properties of the stream that gets decoded.
Definition: avcodec.h:3178
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:467
AVStereo3D stereo3d
Definition: mpeg12dec.c:58
static int lowres
Definition: ffplay.c:334
#define IS_INTRA(x, y)
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2026
int16_t position[3][2]
position of the top left corner in 1/16 pel for up to 3 fields/frames
Definition: avcodec.h:1100
void * priv_data
Definition: avcodec.h:1560
#define PICT_FRAME
Definition: mpegutils.h:39
int frame_rate_index
Definition: mpegvideo.h:217
av_cold int ff_mpv_common_init(MpegEncContext *s)
init common structure for both encoder and decoder.
Definition: mpegvideo.c:892
static int mpeg_decode_postinit(AVCodecContext *avctx)
Definition: mpeg12dec.c:1209
static av_always_inline int diff(const uint32_t a, const uint32_t b)
int picture_structure
Definition: mpegvideo.h:460
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:2628
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:85
void ff_mpv_frame_end(MpegEncContext *s)
Definition: mpegvideo.c:1436
#define MT_FRAME
Definition: mpeg12dec.c:651
#define MV_TYPE_DMV
2 vectors, special mpeg2 Dual Prime Vectors
Definition: mpegvideo.h:270
void ff_mpv_reconstruct_mb(MpegEncContext *s, int16_t block[12][64])
Definition: mpegvideo.c:2260
#define SEQ_START_CODE
Definition: mpegvideo.h:68
int resync_mb_y
y position of last resync marker
Definition: mpegvideo.h:357
int16_t(* block)[64]
points to one of the following blocks
Definition: mpegvideo.h:507
ParseContext parse_context
Definition: mpegvideo.h:362
VLC_TYPE(* table)[2]
code, bits
Definition: vlc.h:28
int64_t bit_rate
wanted bit rate
Definition: mpegvideo.h:103
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:304
static const uint8_t * align_get_bits(GetBitContext *s)
Definition: get_bits.h:658
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:1620
#define HAVE_THREADS
Definition: config.h:270
MpegEncContext mpeg_enc_ctx
Definition: mpeg12dec.c:54
int slice_count
Definition: mpeg12dec.c:64
atomic_int error_count
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
#define MB_TYPE_ZERO_MV
Definition: mpeg12dec.c:74
#define AV_CODEC_FLAG_TRUNCATED
Input bitstream might be truncated at a random location instead of only at frame boundaries.
Definition: avcodec.h:879
#define AV_CODEC_FLAG2_SHOW_ALL
Show all frames before the first keyframe.
Definition: avcodec.h:938
uint16_t intra_matrix[64]
matrix transmitted in the bitstream
Definition: mpegvideo.h:300
uint32_t * mb_type
types and macros are defined in mpegutils.h
Definition: mpegpicture.h:56
#define av_freep(p)
#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:90
#define PICTURE_START_CODE
Definition: mpegvideo.h:70
static int skip_1stop_8data_bits(GetBitContext *gb)
Definition: get_bits.h:819
static const uint8_t start_code[]
HW decoding through Direct3D11 via old API, Picture.data[3] contains a ID3D11VideoDecoderOutputView p...
Definition: pixfmt.h:229
MPEG-1 4:2:0, JPEG 4:2:0, H.263 4:2:0.
Definition: pixfmt.h:534
#define ER_AC_END
static int mpeg_get_qscale(MpegEncContext *s)
Definition: mpegvideo.h:759
static int slice_decode_thread(AVCodecContext *c, void *arg)
Definition: mpeg12dec.c:1975
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:2825
static enum AVPixelFormat mpeg12_pixfmt_list_444[]
Definition: mpeg12dec.c:1166
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
This structure stores compressed data.
Definition: avcodec.h:1422
void ff_mpv_report_decode_progress(MpegEncContext *s)
Definition: mpegvideo.c:2357
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:968
#define CONFIG_MPEG2_XVMC_HWACCEL
Definition: config.h:1456
#define MB_TYPE_L0
Definition: mpegutils.h:67
static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
Definition: mpeg12dec.c:1460
Predicted.
Definition: avutil.h:275
#define AV_TIMECODE_STR_SIZE
Definition: timecode.h:33
int64_t rc_max_rate
maximum bitrate
Definition: avcodec.h:2407
const AVRational ff_mpeg12_frame_rate_tab[]
AVPanScan pan_scan
Definition: mpeg12dec.c:57
VLC ff_mb_btype_vlc
Definition: mpeg12.c:134