FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
mpeg12dec.c
Go to the documentation of this file.
1 /*
2  * MPEG-1/2 decoder
3  * Copyright (c) 2000, 2001 Fabrice Bellard
4  * Copyright (c) 2002-2013 Michael Niedermayer <michaelni@gmx.at>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * MPEG-1/2 decoder
26  */
27 
28 #define UNCHECKED_BITSTREAM_READER 1
29 #include <inttypes.h>
30 
31 #include "libavutil/attributes.h"
32 #include "libavutil/imgutils.h"
33 #include "libavutil/internal.h"
34 #include "libavutil/stereo3d.h"
35 
36 #include "avcodec.h"
37 #include "bytestream.h"
38 #include "error_resilience.h"
39 #include "idctdsp.h"
40 #include "internal.h"
41 #include "mpeg_er.h"
42 #include "mpeg12.h"
43 #include "mpeg12data.h"
44 #include "mpegutils.h"
45 #include "mpegvideo.h"
46 #include "mpegvideodata.h"
47 #include "profiles.h"
48 #include "thread.h"
49 #include "version.h"
50 #include "vdpau_compat.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 check_scantable_index(ctx, x) \
128  do { \
129  if ((x) > 63) { \
130  av_log(ctx->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", \
131  ctx->mb_x, ctx->mb_y); \
132  return AVERROR_INVALIDDATA; \
133  } \
134  } while (0)
135 
137  int16_t *block, int n)
138 {
139  int level, dc, diff, i, j, run;
140  int component;
141  RLTable *rl = &ff_rl_mpeg1;
142  uint8_t *const scantable = s->intra_scantable.permutated;
143  const uint16_t *quant_matrix = s->intra_matrix;
144  const int qscale = s->qscale;
145 
146  /* DC coefficient */
147  component = (n <= 3 ? 0 : n - 4 + 1);
148  diff = decode_dc(&s->gb, component);
149  if (diff >= 0xffff)
150  return AVERROR_INVALIDDATA;
151  dc = s->last_dc[component];
152  dc += diff;
153  s->last_dc[component] = dc;
154  block[0] = dc * quant_matrix[0];
155  ff_tlog(s->avctx, "dc=%d diff=%d\n", dc, diff);
156  i = 0;
157  {
158  OPEN_READER(re, &s->gb);
159  UPDATE_CACHE(re, &s->gb);
160  if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
161  goto end;
162 
163  /* now quantify & encode AC coefficients */
164  for (;;) {
165  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
166  TEX_VLC_BITS, 2, 0);
167 
168  if (level != 0) {
169  i += run;
170  check_scantable_index(s, i);
171  j = scantable[i];
172  level = (level * qscale * quant_matrix[j]) >> 4;
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  check_scantable_index(s, i);
193  j = scantable[i];
194  if (level < 0) {
195  level = -level;
196  level = (level * qscale * quant_matrix[j]) >> 4;
197  level = (level - 1) | 1;
198  level = -level;
199  } else {
200  level = (level * qscale * quant_matrix[j]) >> 4;
201  level = (level - 1) | 1;
202  }
203  }
204 
205  block[j] = level;
206  if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
207  break;
208 
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  s->block_last_index[n] = i;
216  return 0;
217 }
218 
220 {
221  return mpeg1_decode_block_intra(s, block, n);
222 }
223 
225  int16_t *block, int n)
226 {
227  int level, i, j, run;
228  RLTable *rl = &ff_rl_mpeg1;
229  uint8_t *const scantable = s->intra_scantable.permutated;
230  const uint16_t *quant_matrix = s->inter_matrix;
231  const int qscale = s->qscale;
232 
233  {
234  OPEN_READER(re, &s->gb);
235  i = -1;
236  // special case for first coefficient, no need to add second VLC table
237  UPDATE_CACHE(re, &s->gb);
238  if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
239  level = (3 * qscale * quant_matrix[0]) >> 5;
240  level = (level - 1) | 1;
241  if (GET_CACHE(re, &s->gb) & 0x40000000)
242  level = -level;
243  block[0] = level;
244  i++;
245  SKIP_BITS(re, &s->gb, 2);
246  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
247  goto end;
248  }
249  /* now quantify & encode AC coefficients */
250  for (;;) {
251  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
252  TEX_VLC_BITS, 2, 0);
253 
254  if (level != 0) {
255  i += run;
256  check_scantable_index(s, i);
257  j = scantable[i];
258  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
259  level = (level - 1) | 1;
260  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
261  SHOW_SBITS(re, &s->gb, 1);
262  SKIP_BITS(re, &s->gb, 1);
263  } else {
264  /* escape */
265  run = SHOW_UBITS(re, &s->gb, 6) + 1;
266  LAST_SKIP_BITS(re, &s->gb, 6);
267  UPDATE_CACHE(re, &s->gb);
268  level = SHOW_SBITS(re, &s->gb, 8);
269  SKIP_BITS(re, &s->gb, 8);
270  if (level == -128) {
271  level = SHOW_UBITS(re, &s->gb, 8) - 256;
272  SKIP_BITS(re, &s->gb, 8);
273  } else if (level == 0) {
274  level = SHOW_UBITS(re, &s->gb, 8);
275  SKIP_BITS(re, &s->gb, 8);
276  }
277  i += run;
278  check_scantable_index(s, i);
279  j = scantable[i];
280  if (level < 0) {
281  level = -level;
282  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
283  level = (level - 1) | 1;
284  level = -level;
285  } else {
286  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
287  level = (level - 1) | 1;
288  }
289  }
290 
291  block[j] = level;
292  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
293  break;
294  UPDATE_CACHE(re, &s->gb);
295  }
296 end:
297  LAST_SKIP_BITS(re, &s->gb, 2);
298  CLOSE_READER(re, &s->gb);
299  }
300  s->block_last_index[n] = i;
301  return 0;
302 }
303 
304 /**
305  * Note: this function can read out of range and crash for corrupt streams.
306  * Changing this would eat up any speed benefits it has.
307  * Do not use "fast" flag if you need the code to be robust.
308  */
310  int16_t *block, int n)
311 {
312  int level, i, j, run;
313  RLTable *rl = &ff_rl_mpeg1;
314  uint8_t *const scantable = s->intra_scantable.permutated;
315  const int qscale = s->qscale;
316 
317  {
318  OPEN_READER(re, &s->gb);
319  i = -1;
320  // Special case for first coefficient, no need to add second VLC table.
321  UPDATE_CACHE(re, &s->gb);
322  if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
323  level = (3 * qscale) >> 1;
324  level = (level - 1) | 1;
325  if (GET_CACHE(re, &s->gb) & 0x40000000)
326  level = -level;
327  block[0] = level;
328  i++;
329  SKIP_BITS(re, &s->gb, 2);
330  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
331  goto end;
332  }
333 
334  /* now quantify & encode AC coefficients */
335  for (;;) {
336  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
337  TEX_VLC_BITS, 2, 0);
338 
339  if (level != 0) {
340  i += run;
341  check_scantable_index(s, i);
342  j = scantable[i];
343  level = ((level * 2 + 1) * qscale) >> 1;
344  level = (level - 1) | 1;
345  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
346  SHOW_SBITS(re, &s->gb, 1);
347  SKIP_BITS(re, &s->gb, 1);
348  } else {
349  /* escape */
350  run = SHOW_UBITS(re, &s->gb, 6) + 1;
351  LAST_SKIP_BITS(re, &s->gb, 6);
352  UPDATE_CACHE(re, &s->gb);
353  level = SHOW_SBITS(re, &s->gb, 8);
354  SKIP_BITS(re, &s->gb, 8);
355  if (level == -128) {
356  level = SHOW_UBITS(re, &s->gb, 8) - 256;
357  SKIP_BITS(re, &s->gb, 8);
358  } else if (level == 0) {
359  level = SHOW_UBITS(re, &s->gb, 8);
360  SKIP_BITS(re, &s->gb, 8);
361  }
362  i += run;
363  check_scantable_index(s, i);
364  j = scantable[i];
365  if (level < 0) {
366  level = -level;
367  level = ((level * 2 + 1) * qscale) >> 1;
368  level = (level - 1) | 1;
369  level = -level;
370  } else {
371  level = ((level * 2 + 1) * qscale) >> 1;
372  level = (level - 1) | 1;
373  }
374  }
375 
376  block[j] = level;
377  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
378  break;
379  UPDATE_CACHE(re, &s->gb);
380  }
381 end:
382  LAST_SKIP_BITS(re, &s->gb, 2);
383  CLOSE_READER(re, &s->gb);
384  }
385  s->block_last_index[n] = i;
386  return 0;
387 }
388 
390  int16_t *block, int n)
391 {
392  int level, i, j, run;
393  RLTable *rl = &ff_rl_mpeg1;
394  uint8_t *const scantable = s->intra_scantable.permutated;
395  const uint16_t *quant_matrix;
396  const int qscale = s->qscale;
397  int mismatch;
398 
399  mismatch = 1;
400 
401  {
402  OPEN_READER(re, &s->gb);
403  i = -1;
404  if (n < 4)
405  quant_matrix = s->inter_matrix;
406  else
407  quant_matrix = s->chroma_inter_matrix;
408 
409  // Special case for first coefficient, no need to add second VLC table.
410  UPDATE_CACHE(re, &s->gb);
411  if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
412  level = (3 * qscale * quant_matrix[0]) >> 5;
413  if (GET_CACHE(re, &s->gb) & 0x40000000)
414  level = -level;
415  block[0] = level;
416  mismatch ^= level;
417  i++;
418  SKIP_BITS(re, &s->gb, 2);
419  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
420  goto end;
421  }
422 
423  /* now quantify & encode AC coefficients */
424  for (;;) {
425  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
426  TEX_VLC_BITS, 2, 0);
427 
428  if (level != 0) {
429  i += run;
430  check_scantable_index(s, i);
431  j = scantable[i];
432  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
433  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
434  SHOW_SBITS(re, &s->gb, 1);
435  SKIP_BITS(re, &s->gb, 1);
436  } else {
437  /* escape */
438  run = SHOW_UBITS(re, &s->gb, 6) + 1;
439  LAST_SKIP_BITS(re, &s->gb, 6);
440  UPDATE_CACHE(re, &s->gb);
441  level = SHOW_SBITS(re, &s->gb, 12);
442  SKIP_BITS(re, &s->gb, 12);
443 
444  i += run;
445  check_scantable_index(s, i);
446  j = scantable[i];
447  if (level < 0) {
448  level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
449  level = -level;
450  } else {
451  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
452  }
453  }
454 
455  mismatch ^= level;
456  block[j] = level;
457  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
458  break;
459  UPDATE_CACHE(re, &s->gb);
460  }
461 end:
462  LAST_SKIP_BITS(re, &s->gb, 2);
463  CLOSE_READER(re, &s->gb);
464  }
465  block[63] ^= (mismatch & 1);
466 
467  s->block_last_index[n] = i;
468  return 0;
469 }
470 
471 /**
472  * Note: this function can read out of range and crash for corrupt streams.
473  * Changing this would eat up any speed benefits it has.
474  * Do not use "fast" flag if you need the code to be robust.
475  */
477  int16_t *block, int n)
478 {
479  int level, i, j, run;
480  RLTable *rl = &ff_rl_mpeg1;
481  uint8_t *const scantable = s->intra_scantable.permutated;
482  const int qscale = s->qscale;
483  OPEN_READER(re, &s->gb);
484  i = -1;
485 
486  // special case for first coefficient, no need to add second VLC table
487  UPDATE_CACHE(re, &s->gb);
488  if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
489  level = (3 * qscale) >> 1;
490  if (GET_CACHE(re, &s->gb) & 0x40000000)
491  level = -level;
492  block[0] = level;
493  i++;
494  SKIP_BITS(re, &s->gb, 2);
495  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
496  goto end;
497  }
498 
499  /* now quantify & encode AC coefficients */
500  for (;;) {
501  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
502 
503  if (level != 0) {
504  i += run;
505  j = scantable[i];
506  level = ((level * 2 + 1) * qscale) >> 1;
507  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
508  SHOW_SBITS(re, &s->gb, 1);
509  SKIP_BITS(re, &s->gb, 1);
510  } else {
511  /* escape */
512  run = SHOW_UBITS(re, &s->gb, 6) + 1;
513  LAST_SKIP_BITS(re, &s->gb, 6);
514  UPDATE_CACHE(re, &s->gb);
515  level = SHOW_SBITS(re, &s->gb, 12);
516  SKIP_BITS(re, &s->gb, 12);
517 
518  i += run;
519  j = scantable[i];
520  if (level < 0) {
521  level = ((-level * 2 + 1) * qscale) >> 1;
522  level = -level;
523  } else {
524  level = ((level * 2 + 1) * qscale) >> 1;
525  }
526  }
527 
528  block[j] = level;
529  if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF || i > 63)
530  break;
531 
532  UPDATE_CACHE(re, &s->gb);
533  }
534 end:
535  LAST_SKIP_BITS(re, &s->gb, 2);
536  CLOSE_READER(re, &s->gb);
537  s->block_last_index[n] = i;
538  return 0;
539 }
540 
542  int16_t *block, int n)
543 {
544  int level, dc, diff, i, j, run;
545  int component;
546  RLTable *rl;
547  uint8_t *const scantable = s->intra_scantable.permutated;
548  const uint16_t *quant_matrix;
549  const int qscale = s->qscale;
550  int mismatch;
551 
552  /* DC coefficient */
553  if (n < 4) {
554  quant_matrix = s->intra_matrix;
555  component = 0;
556  } else {
557  quant_matrix = s->chroma_intra_matrix;
558  component = (n & 1) + 1;
559  }
560  diff = decode_dc(&s->gb, component);
561  if (diff >= 0xffff)
562  return AVERROR_INVALIDDATA;
563  dc = s->last_dc[component];
564  dc += diff;
565  s->last_dc[component] = dc;
566  block[0] = dc << (3 - s->intra_dc_precision);
567  ff_tlog(s->avctx, "dc=%d\n", block[0]);
568  mismatch = block[0] ^ 1;
569  i = 0;
570  if (s->intra_vlc_format)
571  rl = &ff_rl_mpeg2;
572  else
573  rl = &ff_rl_mpeg1;
574 
575  {
576  OPEN_READER(re, &s->gb);
577  /* now quantify & encode AC coefficients */
578  for (;;) {
579  UPDATE_CACHE(re, &s->gb);
580  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
581  TEX_VLC_BITS, 2, 0);
582 
583  if (level == 127) {
584  break;
585  } else if (level != 0) {
586  i += run;
587  check_scantable_index(s, i);
588  j = scantable[i];
589  level = (level * qscale * quant_matrix[j]) >> 4;
590  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
591  SHOW_SBITS(re, &s->gb, 1);
592  LAST_SKIP_BITS(re, &s->gb, 1);
593  } else {
594  /* escape */
595  run = SHOW_UBITS(re, &s->gb, 6) + 1;
596  LAST_SKIP_BITS(re, &s->gb, 6);
597  UPDATE_CACHE(re, &s->gb);
598  level = SHOW_SBITS(re, &s->gb, 12);
599  SKIP_BITS(re, &s->gb, 12);
600  i += run;
601  check_scantable_index(s, i);
602  j = scantable[i];
603  if (level < 0) {
604  level = (-level * qscale * quant_matrix[j]) >> 4;
605  level = -level;
606  } else {
607  level = (level * qscale * quant_matrix[j]) >> 4;
608  }
609  }
610 
611  mismatch ^= level;
612  block[j] = level;
613  }
614  CLOSE_READER(re, &s->gb);
615  }
616  block[63] ^= mismatch & 1;
617 
618  s->block_last_index[n] = i;
619  return 0;
620 }
621 
622 /**
623  * Note: this function can read out of range and crash for corrupt streams.
624  * Changing this would eat up any speed benefits it has.
625  * Do not use "fast" flag if you need the code to be robust.
626  */
628  int16_t *block, int n)
629 {
630  int level, dc, diff, i, j, run;
631  int component;
632  RLTable *rl;
633  uint8_t *const scantable = s->intra_scantable.permutated;
634  const uint16_t *quant_matrix;
635  const int qscale = s->qscale;
636 
637  /* DC coefficient */
638  if (n < 4) {
639  quant_matrix = s->intra_matrix;
640  component = 0;
641  } else {
642  quant_matrix = s->chroma_intra_matrix;
643  component = (n & 1) + 1;
644  }
645  diff = decode_dc(&s->gb, component);
646  if (diff >= 0xffff)
647  return AVERROR_INVALIDDATA;
648  dc = s->last_dc[component];
649  dc += diff;
650  s->last_dc[component] = dc;
651  block[0] = dc << (3 - s->intra_dc_precision);
652  i = 0;
653  if (s->intra_vlc_format)
654  rl = &ff_rl_mpeg2;
655  else
656  rl = &ff_rl_mpeg1;
657 
658  {
659  OPEN_READER(re, &s->gb);
660  /* now quantify & encode AC coefficients */
661  for (;;) {
662  UPDATE_CACHE(re, &s->gb);
663  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
664  TEX_VLC_BITS, 2, 0);
665 
666  if (level >= 64 || i > 63) {
667  break;
668  } else if (level != 0) {
669  i += run;
670  j = scantable[i];
671  level = (level * qscale * quant_matrix[j]) >> 4;
672  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
673  SHOW_SBITS(re, &s->gb, 1);
674  LAST_SKIP_BITS(re, &s->gb, 1);
675  } else {
676  /* escape */
677  run = SHOW_UBITS(re, &s->gb, 6) + 1;
678  LAST_SKIP_BITS(re, &s->gb, 6);
679  UPDATE_CACHE(re, &s->gb);
680  level = SHOW_SBITS(re, &s->gb, 12);
681  SKIP_BITS(re, &s->gb, 12);
682  i += run;
683  j = scantable[i];
684  if (level < 0) {
685  level = (-level * qscale * quant_matrix[j]) >> 4;
686  level = -level;
687  } else {
688  level = (level * qscale * quant_matrix[j]) >> 4;
689  }
690  }
691 
692  block[j] = level;
693  }
694  CLOSE_READER(re, &s->gb);
695  }
696 
697  s->block_last_index[n] = i;
698  return 0;
699 }
700 
701 /******************************************/
702 /* decoding */
703 
704 static inline int get_dmv(MpegEncContext *s)
705 {
706  if (get_bits1(&s->gb))
707  return 1 - (get_bits1(&s->gb) << 1);
708  else
709  return 0;
710 }
711 
712 static inline int get_qscale(MpegEncContext *s)
713 {
714  int qscale = get_bits(&s->gb, 5);
715  if (s->q_scale_type)
716  return ff_mpeg2_non_linear_qscale[qscale];
717  else
718  return qscale << 1;
719 }
720 
721 
722 /* motion type (for MPEG-2) */
723 #define MT_FIELD 1
724 #define MT_FRAME 2
725 #define MT_16X8 2
726 #define MT_DMV 3
727 
728 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
729 {
730  int i, j, k, cbp, val, mb_type, motion_type;
731  const int mb_block_count = 4 + (1 << s->chroma_format);
732  int ret;
733 
734  ff_tlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
735 
736  av_assert2(s->mb_skipped == 0);
737 
738  if (s->mb_skip_run-- != 0) {
739  if (s->pict_type == AV_PICTURE_TYPE_P) {
740  s->mb_skipped = 1;
741  s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
743  } else {
744  int mb_type;
745 
746  if (s->mb_x)
747  mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
748  else
749  // FIXME not sure if this is allowed in MPEG at all
750  mb_type = s->current_picture.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1];
751  if (IS_INTRA(mb_type)) {
752  av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
753  return AVERROR_INVALIDDATA;
754  }
755  s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
756  mb_type | MB_TYPE_SKIP;
757 
758  if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
759  s->mb_skipped = 1;
760  }
761 
762  return 0;
763  }
764 
765  switch (s->pict_type) {
766  default:
767  case AV_PICTURE_TYPE_I:
768  if (get_bits1(&s->gb) == 0) {
769  if (get_bits1(&s->gb) == 0) {
771  "invalid mb type in I Frame at %d %d\n",
772  s->mb_x, s->mb_y);
773  return AVERROR_INVALIDDATA;
774  }
775  mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
776  } else {
777  mb_type = MB_TYPE_INTRA;
778  }
779  break;
780  case AV_PICTURE_TYPE_P:
781  mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
782  if (mb_type < 0) {
784  "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
785  return AVERROR_INVALIDDATA;
786  }
787  mb_type = ptype2mb_type[mb_type];
788  break;
789  case AV_PICTURE_TYPE_B:
790  mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
791  if (mb_type < 0) {
793  "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
794  return AVERROR_INVALIDDATA;
795  }
796  mb_type = btype2mb_type[mb_type];
797  break;
798  }
799  ff_tlog(s->avctx, "mb_type=%x\n", mb_type);
800 // motion_type = 0; /* avoid warning */
801  if (IS_INTRA(mb_type)) {
802  s->bdsp.clear_blocks(s->block[0]);
803 
804  if (!s->chroma_y_shift)
805  s->bdsp.clear_blocks(s->block[6]);
806 
807  /* compute DCT type */
808  // FIXME: add an interlaced_dct coded var?
809  if (s->picture_structure == PICT_FRAME &&
811  s->interlaced_dct = get_bits1(&s->gb);
812 
813  if (IS_QUANT(mb_type))
814  s->qscale = get_qscale(s);
815 
817  /* just parse them */
818  if (s->picture_structure != PICT_FRAME)
819  skip_bits1(&s->gb); /* field select */
820 
821  s->mv[0][0][0] =
822  s->last_mv[0][0][0] =
823  s->last_mv[0][1][0] = mpeg_decode_motion(s, s->mpeg_f_code[0][0],
824  s->last_mv[0][0][0]);
825  s->mv[0][0][1] =
826  s->last_mv[0][0][1] =
827  s->last_mv[0][1][1] = mpeg_decode_motion(s, s->mpeg_f_code[0][1],
828  s->last_mv[0][0][1]);
829 
830  check_marker(&s->gb, "after concealment_motion_vectors");
831  } else {
832  /* reset mv prediction */
833  memset(s->last_mv, 0, sizeof(s->last_mv));
834  }
835  s->mb_intra = 1;
836  // if 1, we memcpy blocks in xvmcvideo
837  if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
838  ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
839 
840  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
841  if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
842  for (i = 0; i < 6; i++)
844  } else {
845  for (i = 0; i < mb_block_count; i++)
846  if ((ret = mpeg2_decode_block_intra(s, *s->pblocks[i], i)) < 0)
847  return ret;
848  }
849  } else {
850  for (i = 0; i < 6; i++)
851  if ((ret = mpeg1_decode_block_intra(s, *s->pblocks[i], i)) < 0)
852  return ret;
853  }
854  } else {
855  if (mb_type & MB_TYPE_ZERO_MV) {
856  av_assert2(mb_type & MB_TYPE_CBP);
857 
858  s->mv_dir = MV_DIR_FORWARD;
859  if (s->picture_structure == PICT_FRAME) {
860  if (s->picture_structure == PICT_FRAME
861  && !s->frame_pred_frame_dct)
862  s->interlaced_dct = get_bits1(&s->gb);
863  s->mv_type = MV_TYPE_16X16;
864  } else {
865  s->mv_type = MV_TYPE_FIELD;
866  mb_type |= MB_TYPE_INTERLACED;
867  s->field_select[0][0] = s->picture_structure - 1;
868  }
869 
870  if (IS_QUANT(mb_type))
871  s->qscale = get_qscale(s);
872 
873  s->last_mv[0][0][0] = 0;
874  s->last_mv[0][0][1] = 0;
875  s->last_mv[0][1][0] = 0;
876  s->last_mv[0][1][1] = 0;
877  s->mv[0][0][0] = 0;
878  s->mv[0][0][1] = 0;
879  } else {
880  av_assert2(mb_type & MB_TYPE_L0L1);
881  // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
882  /* get additional motion vector type */
884  motion_type = MT_FRAME;
885  } else {
886  motion_type = get_bits(&s->gb, 2);
887  if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
888  s->interlaced_dct = get_bits1(&s->gb);
889  }
890 
891  if (IS_QUANT(mb_type))
892  s->qscale = get_qscale(s);
893 
894  /* motion vectors */
895  s->mv_dir = (mb_type >> 13) & 3;
896  ff_tlog(s->avctx, "motion_type=%d\n", motion_type);
897  switch (motion_type) {
898  case MT_FRAME: /* or MT_16X8 */
899  if (s->picture_structure == PICT_FRAME) {
900  mb_type |= MB_TYPE_16x16;
901  s->mv_type = MV_TYPE_16X16;
902  for (i = 0; i < 2; i++) {
903  if (USES_LIST(mb_type, i)) {
904  /* MT_FRAME */
905  s->mv[i][0][0] =
906  s->last_mv[i][0][0] =
907  s->last_mv[i][1][0] =
908  mpeg_decode_motion(s, s->mpeg_f_code[i][0],
909  s->last_mv[i][0][0]);
910  s->mv[i][0][1] =
911  s->last_mv[i][0][1] =
912  s->last_mv[i][1][1] =
913  mpeg_decode_motion(s, s->mpeg_f_code[i][1],
914  s->last_mv[i][0][1]);
915  /* full_pel: only for MPEG-1 */
916  if (s->full_pel[i]) {
917  s->mv[i][0][0] <<= 1;
918  s->mv[i][0][1] <<= 1;
919  }
920  }
921  }
922  } else {
923  mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
924  s->mv_type = MV_TYPE_16X8;
925  for (i = 0; i < 2; i++) {
926  if (USES_LIST(mb_type, i)) {
927  /* MT_16X8 */
928  for (j = 0; j < 2; j++) {
929  s->field_select[i][j] = get_bits1(&s->gb);
930  for (k = 0; k < 2; k++) {
931  val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
932  s->last_mv[i][j][k]);
933  s->last_mv[i][j][k] = val;
934  s->mv[i][j][k] = val;
935  }
936  }
937  }
938  }
939  }
940  break;
941  case MT_FIELD:
942  s->mv_type = MV_TYPE_FIELD;
943  if (s->picture_structure == PICT_FRAME) {
944  mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
945  for (i = 0; i < 2; i++) {
946  if (USES_LIST(mb_type, i)) {
947  for (j = 0; j < 2; j++) {
948  s->field_select[i][j] = get_bits1(&s->gb);
949  val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
950  s->last_mv[i][j][0]);
951  s->last_mv[i][j][0] = val;
952  s->mv[i][j][0] = val;
953  ff_tlog(s->avctx, "fmx=%d\n", val);
954  val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
955  s->last_mv[i][j][1] >> 1);
956  s->last_mv[i][j][1] = 2 * val;
957  s->mv[i][j][1] = val;
958  ff_tlog(s->avctx, "fmy=%d\n", val);
959  }
960  }
961  }
962  } else {
964  mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
965  for (i = 0; i < 2; i++) {
966  if (USES_LIST(mb_type, i)) {
967  s->field_select[i][0] = get_bits1(&s->gb);
968  for (k = 0; k < 2; k++) {
969  val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
970  s->last_mv[i][0][k]);
971  s->last_mv[i][0][k] = val;
972  s->last_mv[i][1][k] = val;
973  s->mv[i][0][k] = val;
974  }
975  }
976  }
977  }
978  break;
979  case MT_DMV:
980  if (s->progressive_sequence){
981  av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
982  return AVERROR_INVALIDDATA;
983  }
984  s->mv_type = MV_TYPE_DMV;
985  for (i = 0; i < 2; i++) {
986  if (USES_LIST(mb_type, i)) {
987  int dmx, dmy, mx, my, m;
988  const int my_shift = s->picture_structure == PICT_FRAME;
989 
990  mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
991  s->last_mv[i][0][0]);
992  s->last_mv[i][0][0] = mx;
993  s->last_mv[i][1][0] = mx;
994  dmx = get_dmv(s);
995  my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
996  s->last_mv[i][0][1] >> my_shift);
997  dmy = get_dmv(s);
998 
999 
1000  s->last_mv[i][0][1] = my << my_shift;
1001  s->last_mv[i][1][1] = my << my_shift;
1002 
1003  s->mv[i][0][0] = mx;
1004  s->mv[i][0][1] = my;
1005  s->mv[i][1][0] = mx; // not used
1006  s->mv[i][1][1] = my; // not used
1007 
1008  if (s->picture_structure == PICT_FRAME) {
1009  mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1010 
1011  // m = 1 + 2 * s->top_field_first;
1012  m = s->top_field_first ? 1 : 3;
1013 
1014  /* top -> top pred */
1015  s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1016  s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
1017  m = 4 - m;
1018  s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1019  s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
1020  } else {
1021  mb_type |= MB_TYPE_16x16;
1022 
1023  s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
1024  s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
1026  s->mv[i][2][1]--;
1027  else
1028  s->mv[i][2][1]++;
1029  }
1030  }
1031  }
1032  break;
1033  default:
1035  "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
1036  return AVERROR_INVALIDDATA;
1037  }
1038  }
1039 
1040  s->mb_intra = 0;
1041  if (HAS_CBP(mb_type)) {
1042  s->bdsp.clear_blocks(s->block[0]);
1043 
1044  cbp = get_vlc2(&s->gb, ff_mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
1045  if (mb_block_count > 6) {
1046  cbp <<= mb_block_count - 6;
1047  cbp |= get_bits(&s->gb, mb_block_count - 6);
1048  s->bdsp.clear_blocks(s->block[6]);
1049  }
1050  if (cbp <= 0) {
1052  "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y);
1053  return AVERROR_INVALIDDATA;
1054  }
1055 
1056  // if 1, we memcpy blocks in xvmcvideo
1057  if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1058  ff_xvmc_pack_pblocks(s, cbp);
1059 
1060  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1061  if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1062  for (i = 0; i < 6; i++) {
1063  if (cbp & 32)
1065  else
1066  s->block_last_index[i] = -1;
1067  cbp += cbp;
1068  }
1069  } else {
1070  cbp <<= 12 - mb_block_count;
1071 
1072  for (i = 0; i < mb_block_count; i++) {
1073  if (cbp & (1 << 11)) {
1074  if ((ret = mpeg2_decode_block_non_intra(s, *s->pblocks[i], i)) < 0)
1075  return ret;
1076  } else {
1077  s->block_last_index[i] = -1;
1078  }
1079  cbp += cbp;
1080  }
1081  }
1082  } else {
1083  if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1084  for (i = 0; i < 6; i++) {
1085  if (cbp & 32)
1086  mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1087  else
1088  s->block_last_index[i] = -1;
1089  cbp += cbp;
1090  }
1091  } else {
1092  for (i = 0; i < 6; i++) {
1093  if (cbp & 32) {
1094  if ((ret = mpeg1_decode_block_inter(s, *s->pblocks[i], i)) < 0)
1095  return ret;
1096  } else {
1097  s->block_last_index[i] = -1;
1098  }
1099  cbp += cbp;
1100  }
1101  }
1102  }
1103  } else {
1104  for (i = 0; i < 12; i++)
1105  s->block_last_index[i] = -1;
1106  }
1107  }
1108 
1109  s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1110 
1111  return 0;
1112 }
1113 
1115 {
1116  Mpeg1Context *s = avctx->priv_data;
1118 
1120 
1121  if ( avctx->codec_tag != AV_RL32("VCR2")
1122  && avctx->codec_tag != AV_RL32("BW10"))
1123  avctx->coded_width = avctx->coded_height = 0; // do not trust dimensions from input
1124  ff_mpv_decode_init(s2, avctx);
1125 
1126  s->mpeg_enc_ctx.avctx = avctx;
1127 
1128  /* we need some permutation to store matrices,
1129  * until the decoder sets the real permutation. */
1130  ff_mpv_idct_init(s2);
1133 
1134  s2->chroma_format = 1;
1135  s->mpeg_enc_ctx_allocated = 0;
1137  s->repeat_field = 0;
1138  s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1139  avctx->color_range = AVCOL_RANGE_MPEG;
1140  return 0;
1141 }
1142 
1143 #if HAVE_THREADS
1144 static int mpeg_decode_update_thread_context(AVCodecContext *avctx,
1145  const AVCodecContext *avctx_from)
1146 {
1147  Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1148  MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1149  int err;
1150 
1151  if (avctx == avctx_from ||
1152  !ctx_from->mpeg_enc_ctx_allocated ||
1153  !s1->context_initialized)
1154  return 0;
1155 
1156  err = ff_mpeg_update_thread_context(avctx, avctx_from);
1157  if (err)
1158  return err;
1159 
1160  if (!ctx->mpeg_enc_ctx_allocated)
1161  memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1162 
1163  if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1164  s->picture_number++;
1165 
1166  return 0;
1167 }
1168 #endif
1169 
1170 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1171  const uint8_t *new_perm)
1172 {
1173  uint16_t temp_matrix[64];
1174  int i;
1175 
1176  memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1177 
1178  for (i = 0; i < 64; i++)
1179  matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1180 }
1181 
1183 #if CONFIG_MPEG1_XVMC_HWACCEL
1185 #endif
1186 #if CONFIG_MPEG1_VDPAU_DECODER && FF_API_VDPAU
1188 #endif
1189 #if CONFIG_MPEG1_VDPAU_HWACCEL
1191 #endif
1194 };
1195 
1197 #if CONFIG_MPEG2_XVMC_HWACCEL
1199 #endif
1200 #if CONFIG_MPEG_VDPAU_DECODER && FF_API_VDPAU
1202 #endif
1203 #if CONFIG_MPEG2_VDPAU_HWACCEL
1205 #endif
1206 #if CONFIG_MPEG2_DXVA2_HWACCEL
1208 #endif
1209 #if CONFIG_MPEG2_D3D11VA_HWACCEL
1211 #endif
1212 #if CONFIG_MPEG2_VAAPI_HWACCEL
1214 #endif
1215 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
1217 #endif
1220 };
1221 
1222 static const enum AVPixelFormat mpeg12_pixfmt_list_422[] = {
1225 };
1226 
1227 static const enum AVPixelFormat mpeg12_pixfmt_list_444[] = {
1230 };
1231 
1232 #if FF_API_VDPAU
1233 static inline int uses_vdpau(AVCodecContext *avctx) {
1234  return avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG1 || avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG2;
1235 }
1236 #endif
1237 
1239 {
1240  Mpeg1Context *s1 = avctx->priv_data;
1241  MpegEncContext *s = &s1->mpeg_enc_ctx;
1242  const enum AVPixelFormat *pix_fmts;
1243 
1244  if (CONFIG_GRAY && (avctx->flags & AV_CODEC_FLAG_GRAY))
1245  return AV_PIX_FMT_GRAY8;
1246 
1247  if (s->chroma_format < 2)
1248  pix_fmts = avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1249  mpeg1_hwaccel_pixfmt_list_420 :
1251  else if (s->chroma_format == 2)
1252  pix_fmts = mpeg12_pixfmt_list_422;
1253  else
1254  pix_fmts = mpeg12_pixfmt_list_444;
1255 
1256  return ff_thread_get_format(avctx, pix_fmts);
1257 }
1258 
1260 {
1261  // until then pix_fmt may be changed right after codec init
1262  if (avctx->hwaccel
1263 #if FF_API_VDPAU
1264  || uses_vdpau(avctx)
1265 #endif
1266  )
1267  if (avctx->idct_algo == FF_IDCT_AUTO)
1268  avctx->idct_algo = FF_IDCT_SIMPLE;
1269 
1270  if (avctx->hwaccel && avctx->pix_fmt == AV_PIX_FMT_XVMC) {
1271  Mpeg1Context *s1 = avctx->priv_data;
1272  MpegEncContext *s = &s1->mpeg_enc_ctx;
1273 
1274  s->pack_pblocks = 1;
1275 #if FF_API_XVMC
1277  avctx->xvmc_acceleration = 2;
1279 #endif /* FF_API_XVMC */
1280  }
1281 }
1282 
1283 /* Call this function when we know all parameters.
1284  * It may be called in different places for MPEG-1 and MPEG-2. */
1286 {
1287  Mpeg1Context *s1 = avctx->priv_data;
1288  MpegEncContext *s = &s1->mpeg_enc_ctx;
1289  uint8_t old_permutation[64];
1290  int ret;
1291 
1292  if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1293  // MPEG-1 aspect
1295  } else { // MPEG-2
1296  // MPEG-2 aspect
1297  if (s->aspect_ratio_info > 1) {
1298  AVRational dar =
1300  (AVRational) { s1->pan_scan.width,
1301  s1->pan_scan.height }),
1302  (AVRational) { s->width, s->height });
1303 
1304  /* We ignore the spec here and guess a bit as reality does not
1305  * match the spec, see for example res_change_ffmpeg_aspect.ts
1306  * and sequence-display-aspect.mpg.
1307  * issue1613, 621, 562 */
1308  if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1309  (av_cmp_q(dar, (AVRational) { 4, 3 }) &&
1310  av_cmp_q(dar, (AVRational) { 16, 9 }))) {
1313  (AVRational) { s->width, s->height });
1314  } else {
1317  (AVRational) { s1->pan_scan.width, s1->pan_scan.height });
1318 // issue1613 4/3 16/9 -> 16/9
1319 // res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1320 // widescreen-issue562.mpg 4/3 16/9 -> 16/9
1321 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1322  ff_dlog(avctx, "aspect A %d/%d\n",
1325  ff_dlog(avctx, "aspect B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1327  }
1328  } else {
1331  }
1332  } // MPEG-2
1333 
1334  if (av_image_check_sar(s->width, s->height,
1335  avctx->sample_aspect_ratio) < 0) {
1336  av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
1337  avctx->sample_aspect_ratio.num,
1338  avctx->sample_aspect_ratio.den);
1339  avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
1340  }
1341 
1342  if ((s1->mpeg_enc_ctx_allocated == 0) ||
1343  avctx->coded_width != s->width ||
1344  avctx->coded_height != s->height ||
1345  s1->save_width != s->width ||
1346  s1->save_height != s->height ||
1347  av_cmp_q(s1->save_aspect, s->avctx->sample_aspect_ratio) ||
1348  (s1->save_progressive_seq != s->progressive_sequence && FFALIGN(s->height, 16) != FFALIGN(s->height, 32)) ||
1349  0) {
1350  if (s1->mpeg_enc_ctx_allocated) {
1351  ParseContext pc = s->parse_context;
1352  s->parse_context.buffer = 0;
1353  ff_mpv_common_end(s);
1354  s->parse_context = pc;
1355  s1->mpeg_enc_ctx_allocated = 0;
1356  }
1357 
1358  ret = ff_set_dimensions(avctx, s->width, s->height);
1359  if (ret < 0)
1360  return ret;
1361 
1362  if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1363  avctx->rc_max_rate = s->bit_rate;
1364  } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1365  (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1366  avctx->bit_rate = s->bit_rate;
1367  }
1368  s1->save_aspect = s->avctx->sample_aspect_ratio;
1369  s1->save_width = s->width;
1370  s1->save_height = s->height;
1371  s1->save_progressive_seq = s->progressive_sequence;
1372 
1373  /* low_delay may be forced, in this case we will have B-frames
1374  * that behave like P-frames. */
1375  avctx->has_b_frames = !s->low_delay;
1376 
1377  if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1378  // MPEG-1 fps
1380  avctx->ticks_per_frame = 1;
1381 
1383  } else { // MPEG-2
1384  // MPEG-2 fps
1386  &s->avctx->framerate.den,
1387  ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num,
1388  ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1389  1 << 30);
1390  avctx->ticks_per_frame = 2;
1391 
1392  switch (s->chroma_format) {
1393  case 1: avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; break;
1394  case 2:
1395  case 3: avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; break;
1396  default: av_assert0(0);
1397  }
1398  } // MPEG-2
1399 
1400  avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1401  setup_hwaccel_for_pixfmt(avctx);
1402 
1403  /* Quantization matrices may need reordering
1404  * if DCT permutation is changed. */
1405  memcpy(old_permutation, s->idsp.idct_permutation, 64 * sizeof(uint8_t));
1406 
1407  ff_mpv_idct_init(s);
1408  if ((ret = ff_mpv_common_init(s)) < 0)
1409  return ret;
1410 
1411  quant_matrix_rebuild(s->intra_matrix, old_permutation, s->idsp.idct_permutation);
1412  quant_matrix_rebuild(s->inter_matrix, old_permutation, s->idsp.idct_permutation);
1415 
1416  s1->mpeg_enc_ctx_allocated = 1;
1417  }
1418  return 0;
1419 }
1420 
1422  int buf_size)
1423 {
1424  Mpeg1Context *s1 = avctx->priv_data;
1425  MpegEncContext *s = &s1->mpeg_enc_ctx;
1426  int ref, f_code, vbv_delay;
1427 
1428  init_get_bits(&s->gb, buf, buf_size * 8);
1429 
1430  ref = get_bits(&s->gb, 10); /* temporal ref */
1431  s->pict_type = get_bits(&s->gb, 3);
1432  if (s->pict_type == 0 || s->pict_type > 3)
1433  return AVERROR_INVALIDDATA;
1434 
1435  vbv_delay = get_bits(&s->gb, 16);
1436  s->vbv_delay = vbv_delay;
1437  if (s->pict_type == AV_PICTURE_TYPE_P ||
1438  s->pict_type == AV_PICTURE_TYPE_B) {
1439  s->full_pel[0] = get_bits1(&s->gb);
1440  f_code = get_bits(&s->gb, 3);
1441  if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1442  return AVERROR_INVALIDDATA;
1443  f_code += !f_code;
1444  s->mpeg_f_code[0][0] = f_code;
1445  s->mpeg_f_code[0][1] = f_code;
1446  }
1447  if (s->pict_type == AV_PICTURE_TYPE_B) {
1448  s->full_pel[1] = get_bits1(&s->gb);
1449  f_code = get_bits(&s->gb, 3);
1450  if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1451  return AVERROR_INVALIDDATA;
1452  f_code += !f_code;
1453  s->mpeg_f_code[1][0] = f_code;
1454  s->mpeg_f_code[1][1] = f_code;
1455  }
1458 
1459  if (avctx->debug & FF_DEBUG_PICT_INFO)
1460  av_log(avctx, AV_LOG_DEBUG,
1461  "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1462 
1463  s->y_dc_scale = 8;
1464  s->c_dc_scale = 8;
1465  return 0;
1466 }
1467 
1469 {
1470  MpegEncContext *s = &s1->mpeg_enc_ctx;
1471  int horiz_size_ext, vert_size_ext;
1472  int bit_rate_ext;
1473 
1474  skip_bits(&s->gb, 1); /* profile and level esc*/
1475  s->avctx->profile = get_bits(&s->gb, 3);
1476  s->avctx->level = get_bits(&s->gb, 4);
1477  s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1478  s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1479 
1480  if (!s->chroma_format) {
1481  s->chroma_format = 1;
1482  av_log(s->avctx, AV_LOG_WARNING, "Chroma format invalid\n");
1483  }
1484 
1485  horiz_size_ext = get_bits(&s->gb, 2);
1486  vert_size_ext = get_bits(&s->gb, 2);
1487  s->width |= (horiz_size_ext << 12);
1488  s->height |= (vert_size_ext << 12);
1489  bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1490  s->bit_rate += (bit_rate_ext << 18) * 400LL;
1491  check_marker(&s->gb, "after bit rate extension");
1492  s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1493 
1494  s->low_delay = get_bits1(&s->gb);
1496  s->low_delay = 1;
1497 
1498  s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1499  s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1500 
1501  ff_dlog(s->avctx, "sequence extension\n");
1503 
1504  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1506  "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%"PRId64"\n",
1508  s->avctx->rc_buffer_size, s->bit_rate);
1509 }
1510 
1512 {
1513  MpegEncContext *s = &s1->mpeg_enc_ctx;
1514  int color_description, w, h;
1515 
1516  skip_bits(&s->gb, 3); /* video format */
1517  color_description = get_bits1(&s->gb);
1518  if (color_description) {
1519  s->avctx->color_primaries = get_bits(&s->gb, 8);
1520  s->avctx->color_trc = get_bits(&s->gb, 8);
1521  s->avctx->colorspace = get_bits(&s->gb, 8);
1522  }
1523  w = get_bits(&s->gb, 14);
1524  skip_bits(&s->gb, 1); // marker
1525  h = get_bits(&s->gb, 14);
1526  // remaining 3 bits are zero padding
1527 
1528  s1->pan_scan.width = 16 * w;
1529  s1->pan_scan.height = 16 * h;
1530 
1531  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1532  av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1533 }
1534 
1536 {
1537  MpegEncContext *s = &s1->mpeg_enc_ctx;
1538  int i, nofco;
1539 
1540  nofco = 1;
1541  if (s->progressive_sequence) {
1542  if (s->repeat_first_field) {
1543  nofco++;
1544  if (s->top_field_first)
1545  nofco++;
1546  }
1547  } else {
1548  if (s->picture_structure == PICT_FRAME) {
1549  nofco++;
1550  if (s->repeat_first_field)
1551  nofco++;
1552  }
1553  }
1554  for (i = 0; i < nofco; i++) {
1555  s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1556  skip_bits(&s->gb, 1); // marker
1557  s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1558  skip_bits(&s->gb, 1); // marker
1559  }
1560 
1561  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1563  "pde (%"PRId16",%"PRId16") (%"PRId16",%"PRId16") (%"PRId16",%"PRId16")\n",
1564  s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1565  s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1566  s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1567 }
1568 
1569 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64],
1570  uint16_t matrix1[64], int intra)
1571 {
1572  int i;
1573 
1574  for (i = 0; i < 64; i++) {
1575  int j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
1576  int v = get_bits(&s->gb, 8);
1577  if (v == 0) {
1578  av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1579  return AVERROR_INVALIDDATA;
1580  }
1581  if (intra && i == 0 && v != 8) {
1582  av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1583  v = 8; // needed by pink.mpg / issue1046
1584  }
1585  matrix0[j] = v;
1586  if (matrix1)
1587  matrix1[j] = v;
1588  }
1589  return 0;
1590 }
1591 
1593 {
1594  ff_dlog(s->avctx, "matrix extension\n");
1595 
1596  if (get_bits1(&s->gb))
1598  if (get_bits1(&s->gb))
1600  if (get_bits1(&s->gb))
1602  if (get_bits1(&s->gb))
1604 }
1605 
1607 {
1608  MpegEncContext *s = &s1->mpeg_enc_ctx;
1609 
1610  s->full_pel[0] = s->full_pel[1] = 0;
1611  s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1612  s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1613  s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1614  s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1615  if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1617  "Missing picture start code, guessing missing values\n");
1618  if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1619  if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1621  else
1623  } else
1627  }
1628  s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1629  s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1630  s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1631  s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1632 
1633  s->intra_dc_precision = get_bits(&s->gb, 2);
1634  s->picture_structure = get_bits(&s->gb, 2);
1635  s->top_field_first = get_bits1(&s->gb);
1636  s->frame_pred_frame_dct = get_bits1(&s->gb);
1638  s->q_scale_type = get_bits1(&s->gb);
1639  s->intra_vlc_format = get_bits1(&s->gb);
1640  s->alternate_scan = get_bits1(&s->gb);
1641  s->repeat_first_field = get_bits1(&s->gb);
1642  s->chroma_420_type = get_bits1(&s->gb);
1643  s->progressive_frame = get_bits1(&s->gb);
1644 
1645  if (s->alternate_scan) {
1648  } else {
1651  }
1652 
1653  /* composite display not parsed */
1654  ff_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1655  ff_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1656  ff_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1657  ff_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1658  ff_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1659  ff_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1660  ff_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1661  ff_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1662  ff_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1663 }
1664 
1665 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1666 {
1667  AVCodecContext *avctx = s->avctx;
1668  Mpeg1Context *s1 = (Mpeg1Context *) s;
1669  int ret;
1670 
1671  /* start frame decoding */
1672  if (s->first_field || s->picture_structure == PICT_FRAME) {
1673  AVFrameSideData *pan_scan;
1674 
1675  if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
1676  return ret;
1677 
1679 
1680  /* first check if we must repeat the frame */
1682  if (s->repeat_first_field) {
1683  if (s->progressive_sequence) {
1684  if (s->top_field_first)
1686  else
1688  } else if (s->progressive_frame) {
1690  }
1691  }
1692 
1695  sizeof(s1->pan_scan));
1696  if (!pan_scan)
1697  return AVERROR(ENOMEM);
1698  memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1699 
1700  if (s1->a53_caption) {
1703  s1->a53_caption_size);
1704  if (sd)
1705  memcpy(sd->data, s1->a53_caption, s1->a53_caption_size);
1706  av_freep(&s1->a53_caption);
1708  }
1709 
1710  if (s1->has_stereo3d) {
1712  if (!stereo)
1713  return AVERROR(ENOMEM);
1714 
1715  *stereo = s1->stereo3d;
1716  s1->has_stereo3d = 0;
1717  }
1718 
1719  if (s1->has_afd) {
1720  AVFrameSideData *sd =
1722  AV_FRAME_DATA_AFD, 1);
1723  if (!sd)
1724  return AVERROR(ENOMEM);
1725 
1726  *sd->data = s1->afd;
1727  s1->has_afd = 0;
1728  }
1729 
1730  if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1731  ff_thread_finish_setup(avctx);
1732  } else { // second field
1733  int i;
1734 
1735  if (!s->current_picture_ptr) {
1736  av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1737  return AVERROR_INVALIDDATA;
1738  }
1739 
1740  if (s->avctx->hwaccel &&
1742  if ((ret = s->avctx->hwaccel->end_frame(s->avctx)) < 0) {
1743  av_log(avctx, AV_LOG_ERROR,
1744  "hardware accelerator failed to decode first field\n");
1745  return ret;
1746  }
1747  }
1748 
1749  for (i = 0; i < 4; i++) {
1750  s->current_picture.f->data[i] = s->current_picture_ptr->f->data[i];
1752  s->current_picture.f->data[i] +=
1753  s->current_picture_ptr->f->linesize[i];
1754  }
1755  }
1756 
1757  if (avctx->hwaccel) {
1758  if ((ret = avctx->hwaccel->start_frame(avctx, buf, buf_size)) < 0)
1759  return ret;
1760  }
1761 
1762  return 0;
1763 }
1764 
1765 #define DECODE_SLICE_ERROR -1
1766 #define DECODE_SLICE_OK 0
1767 
1768 /**
1769  * Decode a slice.
1770  * MpegEncContext.mb_y must be set to the MB row from the startcode.
1771  * @return DECODE_SLICE_ERROR if the slice is damaged,
1772  * DECODE_SLICE_OK if this slice is OK
1773  */
1774 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1775  const uint8_t **buf, int buf_size)
1776 {
1777  AVCodecContext *avctx = s->avctx;
1778  const int lowres = s->avctx->lowres;
1779  const int field_pic = s->picture_structure != PICT_FRAME;
1780  int ret;
1781 
1782  s->resync_mb_x =
1783  s->resync_mb_y = -1;
1784 
1785  av_assert0(mb_y < s->mb_height);
1786 
1787  init_get_bits(&s->gb, *buf, buf_size * 8);
1788  if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1789  skip_bits(&s->gb, 3);
1790 
1792  s->interlaced_dct = 0;
1793 
1794  s->qscale = get_qscale(s);
1795 
1796  if (s->qscale == 0) {
1797  av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1798  return AVERROR_INVALIDDATA;
1799  }
1800 
1801  /* extra slice info */
1802  if (skip_1stop_8data_bits(&s->gb) < 0)
1803  return AVERROR_INVALIDDATA;
1804 
1805  s->mb_x = 0;
1806 
1807  if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1808  skip_bits1(&s->gb);
1809  } else {
1810  while (get_bits_left(&s->gb) > 0) {
1811  int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1812  MBINCR_VLC_BITS, 2);
1813  if (code < 0) {
1814  av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1815  return AVERROR_INVALIDDATA;
1816  }
1817  if (code >= 33) {
1818  if (code == 33)
1819  s->mb_x += 33;
1820  /* otherwise, stuffing, nothing to do */
1821  } else {
1822  s->mb_x += code;
1823  break;
1824  }
1825  }
1826  }
1827 
1828  if (s->mb_x >= (unsigned) s->mb_width) {
1829  av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1830  return AVERROR_INVALIDDATA;
1831  }
1832 
1833  if (avctx->hwaccel && avctx->hwaccel->decode_slice) {
1834  const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1835  int start_code = -1;
1836  buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1837  if (buf_end < *buf + buf_size)
1838  buf_end -= 4;
1839  s->mb_y = mb_y;
1840  if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1841  return DECODE_SLICE_ERROR;
1842  *buf = buf_end;
1843  return DECODE_SLICE_OK;
1844  }
1845 
1846  s->resync_mb_x = s->mb_x;
1847  s->resync_mb_y = s->mb_y = mb_y;
1848  s->mb_skip_run = 0;
1850 
1851  if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1852  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1854  "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",
1855  s->qscale,
1856  s->mpeg_f_code[0][0], s->mpeg_f_code[0][1],
1857  s->mpeg_f_code[1][0], s->mpeg_f_code[1][1],
1858  s->pict_type == AV_PICTURE_TYPE_I ? "I" :
1859  (s->pict_type == AV_PICTURE_TYPE_P ? "P" :
1860  (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")),
1861  s->progressive_sequence ? "ps" : "",
1862  s->progressive_frame ? "pf" : "",
1863  s->alternate_scan ? "alt" : "",
1864  s->top_field_first ? "top" : "",
1868  s->repeat_first_field, s->chroma_420_type ? "420" : "");
1869  }
1870  }
1871 
1872  for (;;) {
1873  // If 1, we memcpy blocks in xvmcvideo.
1874  if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1875  ff_xvmc_init_block(s); // set s->block
1876 
1877  if ((ret = mpeg_decode_mb(s, s->block)) < 0)
1878  return ret;
1879 
1880  // Note motion_val is normally NULL unless we want to extract the MVs.
1881  if (s->current_picture.motion_val[0] && !s->encoding) {
1882  const int wrap = s->b8_stride;
1883  int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1884  int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1885  int motion_x, motion_y, dir, i;
1886 
1887  for (i = 0; i < 2; i++) {
1888  for (dir = 0; dir < 2; dir++) {
1889  if (s->mb_intra ||
1890  (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1891  motion_x = motion_y = 0;
1892  } else if (s->mv_type == MV_TYPE_16X16 ||
1893  (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1894  motion_x = s->mv[dir][0][0];
1895  motion_y = s->mv[dir][0][1];
1896  } else { /* if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8)) */
1897  motion_x = s->mv[dir][i][0];
1898  motion_y = s->mv[dir][i][1];
1899  }
1900 
1901  s->current_picture.motion_val[dir][xy][0] = motion_x;
1902  s->current_picture.motion_val[dir][xy][1] = motion_y;
1903  s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1904  s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1905  s->current_picture.ref_index [dir][b8_xy] =
1906  s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1907  av_assert2(s->field_select[dir][i] == 0 ||
1908  s->field_select[dir][i] == 1);
1909  }
1910  xy += wrap;
1911  b8_xy += 2;
1912  }
1913  }
1914 
1915  s->dest[0] += 16 >> lowres;
1916  s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1917  s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1918 
1919  ff_mpv_decode_mb(s, s->block);
1920 
1921  if (++s->mb_x >= s->mb_width) {
1922  const int mb_size = 16 >> s->avctx->lowres;
1923 
1924  ff_mpeg_draw_horiz_band(s, mb_size * (s->mb_y >> field_pic), mb_size);
1926 
1927  s->mb_x = 0;
1928  s->mb_y += 1 << field_pic;
1929 
1930  if (s->mb_y >= s->mb_height) {
1931  int left = get_bits_left(&s->gb);
1932  int is_d10 = s->chroma_format == 2 &&
1933  s->pict_type == AV_PICTURE_TYPE_I &&
1934  avctx->profile == 0 && avctx->level == 5 &&
1935  s->intra_dc_precision == 2 &&
1936  s->q_scale_type == 1 && s->alternate_scan == 0 &&
1937  s->progressive_frame == 0
1938  /* vbv_delay == 0xBBB || 0xE10 */;
1939 
1940  if (left >= 32 && !is_d10) {
1941  GetBitContext gb = s->gb;
1942  align_get_bits(&gb);
1943  if (show_bits(&gb, 24) == 0x060E2B) {
1944  av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1945  is_d10 = 1;
1946  }
1947  }
1948 
1949  if (left < 0 ||
1950  (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) ||
1951  ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1952  av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n",
1953  left, left>0 ? show_bits(&s->gb, FFMIN(left, 23)) : 0);
1954  return AVERROR_INVALIDDATA;
1955  } else
1956  goto eos;
1957  }
1958  // There are some files out there which are missing the last slice
1959  // in cases where the slice is completely outside the visible
1960  // area, we detect this here instead of running into the end expecting
1961  // more data
1962  if (s->mb_y >= ((s->height + 15) >> 4) &&
1963  !s->progressive_sequence &&
1964  get_bits_left(&s->gb) <= 8 &&
1965  get_bits_left(&s->gb) >= 0 &&
1966  s->mb_skip_run == -1 &&
1967  show_bits(&s->gb, 8) == 0)
1968  goto eos;
1969 
1971  }
1972 
1973  /* skip mb handling */
1974  if (s->mb_skip_run == -1) {
1975  /* read increment again */
1976  s->mb_skip_run = 0;
1977  for (;;) {
1978  int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1979  MBINCR_VLC_BITS, 2);
1980  if (code < 0) {
1981  av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1982  return AVERROR_INVALIDDATA;
1983  }
1984  if (code >= 33) {
1985  if (code == 33) {
1986  s->mb_skip_run += 33;
1987  } else if (code == 35) {
1988  if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1989  av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1990  return AVERROR_INVALIDDATA;
1991  }
1992  goto eos; /* end of slice */
1993  }
1994  /* otherwise, stuffing, nothing to do */
1995  } else {
1996  s->mb_skip_run += code;
1997  break;
1998  }
1999  }
2000  if (s->mb_skip_run) {
2001  int i;
2002  if (s->pict_type == AV_PICTURE_TYPE_I) {
2004  "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
2005  return AVERROR_INVALIDDATA;
2006  }
2007 
2008  /* skip mb */
2009  s->mb_intra = 0;
2010  for (i = 0; i < 12; i++)
2011  s->block_last_index[i] = -1;
2013  s->mv_type = MV_TYPE_16X16;
2014  else
2015  s->mv_type = MV_TYPE_FIELD;
2016  if (s->pict_type == AV_PICTURE_TYPE_P) {
2017  /* if P type, zero motion vector is implied */
2018  s->mv_dir = MV_DIR_FORWARD;
2019  s->mv[0][0][0] = s->mv[0][0][1] = 0;
2020  s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
2021  s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
2022  s->field_select[0][0] = (s->picture_structure - 1) & 1;
2023  } else {
2024  /* if B type, reuse previous vectors and directions */
2025  s->mv[0][0][0] = s->last_mv[0][0][0];
2026  s->mv[0][0][1] = s->last_mv[0][0][1];
2027  s->mv[1][0][0] = s->last_mv[1][0][0];
2028  s->mv[1][0][1] = s->last_mv[1][0][1];
2029  }
2030  }
2031  }
2032  }
2033 eos: // end of slice
2034  if (get_bits_left(&s->gb) < 0) {
2035  av_log(s, AV_LOG_ERROR, "overread %d\n", -get_bits_left(&s->gb));
2036  return AVERROR_INVALIDDATA;
2037  }
2038  *buf += (get_bits_count(&s->gb) - 1) / 8;
2039  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);
2040  return 0;
2041 }
2042 
2044 {
2045  MpegEncContext *s = *(void **) arg;
2046  const uint8_t *buf = s->gb.buffer;
2047  int mb_y = s->start_mb_y;
2048  const int field_pic = s->picture_structure != PICT_FRAME;
2049 
2050  s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
2051 
2052  for (;;) {
2053  uint32_t start_code;
2054  int ret;
2055 
2056  ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
2057  emms_c();
2058  ff_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
2059  ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
2060  s->start_mb_y, s->end_mb_y, s->er.error_count);
2061  if (ret < 0) {
2062  if (c->err_recognition & AV_EF_EXPLODE)
2063  return ret;
2064  if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
2066  s->mb_x, s->mb_y,
2068  } else {
2070  s->mb_x - 1, s->mb_y,
2072  }
2073 
2074  if (s->mb_y == s->end_mb_y)
2075  return 0;
2076 
2077  start_code = -1;
2078  buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
2079  mb_y = start_code - SLICE_MIN_START_CODE;
2080  if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
2081  mb_y += (*buf&0xE0)<<2;
2082  mb_y <<= field_pic;
2084  mb_y++;
2085  if (mb_y < 0 || mb_y >= s->end_mb_y)
2086  return AVERROR_INVALIDDATA;
2087  }
2088 }
2089 
2090 /**
2091  * Handle slice ends.
2092  * @return 1 if it seems to be the last slice
2093  */
2094 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2095 {
2096  Mpeg1Context *s1 = avctx->priv_data;
2097  MpegEncContext *s = &s1->mpeg_enc_ctx;
2098 
2100  return 0;
2101 
2102  if (s->avctx->hwaccel) {
2103  int ret = s->avctx->hwaccel->end_frame(s->avctx);
2104  if (ret < 0) {
2105  av_log(avctx, AV_LOG_ERROR,
2106  "hardware accelerator failed to decode picture\n");
2107  return ret;
2108  }
2109  }
2110 
2111  /* end of slice reached */
2112  if (/* s->mb_y << field_pic == s->mb_height && */ !s->first_field && !s1->first_slice) {
2113  /* end of image */
2114 
2115  ff_er_frame_end(&s->er);
2116 
2117  ff_mpv_frame_end(s);
2118 
2119  if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
2120  int ret = av_frame_ref(pict, s->current_picture_ptr->f);
2121  if (ret < 0)
2122  return ret;
2125  } else {
2126  if (avctx->active_thread_type & FF_THREAD_FRAME)
2127  s->picture_number++;
2128  /* latency of 1 frame for I- and P-frames */
2129  /* XXX: use another variable than picture_number */
2130  if (s->last_picture_ptr) {
2131  int ret = av_frame_ref(pict, s->last_picture_ptr->f);
2132  if (ret < 0)
2133  return ret;
2136  }
2137  }
2138 
2139  return 1;
2140  } else {
2141  return 0;
2142  }
2143 }
2144 
2146  const uint8_t *buf, int buf_size)
2147 {
2148  Mpeg1Context *s1 = avctx->priv_data;
2149  MpegEncContext *s = &s1->mpeg_enc_ctx;
2150  int width, height;
2151  int i, v, j;
2152 
2153  init_get_bits(&s->gb, buf, buf_size * 8);
2154 
2155  width = get_bits(&s->gb, 12);
2156  height = get_bits(&s->gb, 12);
2157  if (width == 0 || height == 0) {
2158  av_log(avctx, AV_LOG_WARNING,
2159  "Invalid horizontal or vertical size value.\n");
2161  return AVERROR_INVALIDDATA;
2162  }
2163  s->aspect_ratio_info = get_bits(&s->gb, 4);
2164  if (s->aspect_ratio_info == 0) {
2165  av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2167  return AVERROR_INVALIDDATA;
2168  }
2169  s->frame_rate_index = get_bits(&s->gb, 4);
2170  if (s->frame_rate_index == 0 || s->frame_rate_index > 13) {
2171  av_log(avctx, AV_LOG_WARNING,
2172  "frame_rate_index %d is invalid\n", s->frame_rate_index);
2173  s->frame_rate_index = 1;
2174  }
2175  s->bit_rate = get_bits(&s->gb, 18) * 400LL;
2176  if (check_marker(&s->gb, "in sequence header") == 0) {
2177  return AVERROR_INVALIDDATA;
2178  }
2179 
2180  s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2181  skip_bits(&s->gb, 1);
2182 
2183  /* get matrix */
2184  if (get_bits1(&s->gb)) {
2186  } else {
2187  for (i = 0; i < 64; i++) {
2188  j = s->idsp.idct_permutation[i];
2190  s->intra_matrix[j] = v;
2191  s->chroma_intra_matrix[j] = v;
2192  }
2193  }
2194  if (get_bits1(&s->gb)) {
2196  } else {
2197  for (i = 0; i < 64; i++) {
2198  int j = s->idsp.idct_permutation[i];
2200  s->inter_matrix[j] = v;
2201  s->chroma_inter_matrix[j] = v;
2202  }
2203  }
2204 
2205  if (show_bits(&s->gb, 23) != 0) {
2206  av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2207  return AVERROR_INVALIDDATA;
2208  }
2209 
2210  s->width = width;
2211  s->height = height;
2212 
2213  /* We set MPEG-2 parameters so that it emulates MPEG-1. */
2214  s->progressive_sequence = 1;
2215  s->progressive_frame = 1;
2217  s->first_field = 0;
2218  s->frame_pred_frame_dct = 1;
2219  s->chroma_format = 1;
2220  s->codec_id =
2222  s->out_format = FMT_MPEG1;
2223  s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2225  s->low_delay = 1;
2226 
2227  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2228  av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%"PRId64", aspect_ratio_info: %d \n",
2230 
2231  return 0;
2232 }
2233 
2235 {
2236  Mpeg1Context *s1 = avctx->priv_data;
2237  MpegEncContext *s = &s1->mpeg_enc_ctx;
2238  int i, v, ret;
2239 
2240  /* start new MPEG-1 context decoding */
2241  s->out_format = FMT_MPEG1;
2242  if (s1->mpeg_enc_ctx_allocated) {
2243  ff_mpv_common_end(s);
2244  s1->mpeg_enc_ctx_allocated = 0;
2245  }
2246  s->width = avctx->coded_width;
2247  s->height = avctx->coded_height;
2248  avctx->has_b_frames = 0; // true?
2249  s->low_delay = 1;
2250 
2251  avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2252  setup_hwaccel_for_pixfmt(avctx);
2253 
2254  ff_mpv_idct_init(s);
2255  if ((ret = ff_mpv_common_init(s)) < 0)
2256  return ret;
2257  s1->mpeg_enc_ctx_allocated = 1;
2258 
2259  for (i = 0; i < 64; i++) {
2260  int j = s->idsp.idct_permutation[i];
2262  s->intra_matrix[j] = v;
2263  s->chroma_intra_matrix[j] = v;
2264 
2266  s->inter_matrix[j] = v;
2267  s->chroma_inter_matrix[j] = v;
2268  }
2269 
2270  s->progressive_sequence = 1;
2271  s->progressive_frame = 1;
2273  s->first_field = 0;
2274  s->frame_pred_frame_dct = 1;
2275  s->chroma_format = 1;
2276  if (s->codec_tag == AV_RL32("BW10")) {
2278  } else {
2279  s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2281  }
2282  s1->save_width = s->width;
2283  s1->save_height = s->height;
2285  return 0;
2286 }
2287 
2289  const uint8_t *p, int buf_size)
2290 {
2291  Mpeg1Context *s1 = avctx->priv_data;
2292 
2293  if (buf_size >= 6 &&
2294  p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2295  p[4] == 3 && (p[5] & 0x40)) {
2296  /* extract A53 Part 4 CC data */
2297  int cc_count = p[5] & 0x1f;
2298  if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2299  av_freep(&s1->a53_caption);
2300  s1->a53_caption_size = cc_count * 3;
2302  if (s1->a53_caption)
2303  memcpy(s1->a53_caption, p + 7, s1->a53_caption_size);
2304  }
2305  return 1;
2306  } else if (buf_size >= 11 &&
2307  p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2308  /* extract DVD CC data */
2309  int cc_count = 0;
2310  int i;
2311  // There is a caption count field in the data, but it is often
2312  // incorect. So count the number of captions present.
2313  for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2314  cc_count++;
2315  // Transform the DVD format into A53 Part 4 format
2316  if (cc_count > 0) {
2317  av_freep(&s1->a53_caption);
2318  s1->a53_caption_size = cc_count * 6;
2320  if (s1->a53_caption) {
2321  uint8_t field1 = !!(p[4] & 0x80);
2322  uint8_t *cap = s1->a53_caption;
2323  p += 5;
2324  for (i = 0; i < cc_count; i++) {
2325  cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2326  cap[1] = p[1];
2327  cap[2] = p[2];
2328  cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2329  cap[4] = p[4];
2330  cap[5] = p[5];
2331  cap += 6;
2332  p += 6;
2333  }
2334  }
2335  }
2336  return 1;
2337  }
2338  return 0;
2339 }
2340 
2342  const uint8_t *p, int buf_size)
2343 {
2344  Mpeg1Context *s = avctx->priv_data;
2345  const uint8_t *buf_end = p + buf_size;
2346  Mpeg1Context *s1 = avctx->priv_data;
2347 
2348 #if 0
2349  int i;
2350  for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2351  av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2352  }
2353  av_log(avctx, AV_LOG_ERROR, "\n");
2354 #endif
2355 
2356  if (buf_size > 29){
2357  int i;
2358  for(i=0; i<20; i++)
2359  if (!memcmp(p+i, "\0TMPGEXS\0", 9)){
2360  s->tmpgexs= 1;
2361  }
2362  }
2363  /* we parse the DTG active format information */
2364  if (buf_end - p >= 5 &&
2365  p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2366  int flags = p[4];
2367  p += 5;
2368  if (flags & 0x80) {
2369  /* skip event id */
2370  p += 2;
2371  }
2372  if (flags & 0x40) {
2373  if (buf_end - p < 1)
2374  return;
2375 #if FF_API_AFD
2377  avctx->dtg_active_format = p[0] & 0x0f;
2379 #endif /* FF_API_AFD */
2380  s1->has_afd = 1;
2381  s1->afd = p[0] & 0x0f;
2382  }
2383  } else if (buf_end - p >= 6 &&
2384  p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2385  p[4] == 0x03) { // S3D_video_format_length
2386  // the 0x7F mask ignores the reserved_bit value
2387  const uint8_t S3D_video_format_type = p[5] & 0x7F;
2388 
2389  if (S3D_video_format_type == 0x03 ||
2390  S3D_video_format_type == 0x04 ||
2391  S3D_video_format_type == 0x08 ||
2392  S3D_video_format_type == 0x23) {
2393 
2394  s1->has_stereo3d = 1;
2395 
2396  switch (S3D_video_format_type) {
2397  case 0x03:
2399  break;
2400  case 0x04:
2402  break;
2403  case 0x08:
2405  break;
2406  case 0x23:
2408  break;
2409  }
2410  }
2411  } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2412  return;
2413  }
2414 }
2415 
2416 static void mpeg_decode_gop(AVCodecContext *avctx,
2417  const uint8_t *buf, int buf_size)
2418 {
2419  Mpeg1Context *s1 = avctx->priv_data;
2420  MpegEncContext *s = &s1->mpeg_enc_ctx;
2421  int broken_link;
2422  int64_t tc;
2423 
2424  init_get_bits(&s->gb, buf, buf_size * 8);
2425 
2426  tc = s-> timecode_frame_start = get_bits(&s->gb, 25);
2427 
2428 #if FF_API_PRIVATE_OPT
2430  avctx->timecode_frame_start = tc;
2432 #endif
2433 
2434  s->closed_gop = get_bits1(&s->gb);
2435  /* broken_link indicate that after editing the
2436  * reference frames of the first B-Frames after GOP I-Frame
2437  * are missing (open gop) */
2438  broken_link = get_bits1(&s->gb);
2439 
2440  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2441  char tcbuf[AV_TIMECODE_STR_SIZE];
2444  "GOP (%s) closed_gop=%d broken_link=%d\n",
2445  tcbuf, s->closed_gop, broken_link);
2446  }
2447 }
2448 
2449 static int decode_chunks(AVCodecContext *avctx, AVFrame *picture,
2450  int *got_output, const uint8_t *buf, int buf_size)
2451 {
2452  Mpeg1Context *s = avctx->priv_data;
2454  const uint8_t *buf_ptr = buf;
2455  const uint8_t *buf_end = buf + buf_size;
2456  int ret, input_size;
2457  int last_code = 0, skip_frame = 0;
2458  int picture_start_code_seen = 0;
2459 
2460  for (;;) {
2461  /* find next start code */
2462  uint32_t start_code = -1;
2463  buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2464  if (start_code > 0x1ff) {
2465  if (!skip_frame) {
2466  if (HAVE_THREADS &&
2467  (avctx->active_thread_type & FF_THREAD_SLICE) &&
2468  !avctx->hwaccel) {
2469  int i;
2470  av_assert0(avctx->thread_count > 1);
2471 
2472  avctx->execute(avctx, slice_decode_thread,
2473  &s2->thread_context[0], NULL,
2474  s->slice_count, sizeof(void *));
2475  for (i = 0; i < s->slice_count; i++)
2476  s2->er.error_count += s2->thread_context[i]->er.error_count;
2477  }
2478 
2479 #if FF_API_VDPAU
2480  if ((CONFIG_MPEG_VDPAU_DECODER || CONFIG_MPEG1_VDPAU_DECODER)
2481  && uses_vdpau(avctx))
2482  ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
2483 #endif
2484 
2485  ret = slice_end(avctx, picture);
2486  if (ret < 0)
2487  return ret;
2488  else if (ret) {
2489  // FIXME: merge with the stuff in mpeg_decode_slice
2490  if (s2->last_picture_ptr || s2->low_delay)
2491  *got_output = 1;
2492  }
2493  }
2494  s2->pict_type = 0;
2495 
2496  if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2497  return AVERROR_INVALIDDATA;
2498 
2499  return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2500  }
2501 
2502  input_size = buf_end - buf_ptr;
2503 
2504  if (avctx->debug & FF_DEBUG_STARTCODE)
2505  av_log(avctx, AV_LOG_DEBUG, "%3"PRIX32" at %"PTRDIFF_SPECIFIER" left %d\n",
2506  start_code, buf_ptr - buf, input_size);
2507 
2508  /* prepare data for next start code */
2509  switch (start_code) {
2510  case SEQ_START_CODE:
2511  if (last_code == 0) {
2512  mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2513  if (buf != avctx->extradata)
2514  s->sync = 1;
2515  } else {
2516  av_log(avctx, AV_LOG_ERROR,
2517  "ignoring SEQ_START_CODE after %X\n", last_code);
2518  if (avctx->err_recognition & AV_EF_EXPLODE)
2519  return AVERROR_INVALIDDATA;
2520  }
2521  break;
2522 
2523  case PICTURE_START_CODE:
2524  if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2525  /* If it's a frame picture, there can't be more than one picture header.
2526  Yet, it does happen and we need to handle it. */
2527  av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2528  break;
2529  }
2530  picture_start_code_seen = 1;
2531 
2532  if (s2->width <= 0 || s2->height <= 0) {
2533  av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2534  s2->width, s2->height);
2535  return AVERROR_INVALIDDATA;
2536  }
2537 
2538  if (s->tmpgexs){
2539  s2->intra_dc_precision= 3;
2540  s2->intra_matrix[0]= 1;
2541  }
2542  if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2543  !avctx->hwaccel && s->slice_count) {
2544  int i;
2545 
2546  avctx->execute(avctx, slice_decode_thread,
2547  s2->thread_context, NULL,
2548  s->slice_count, sizeof(void *));
2549  for (i = 0; i < s->slice_count; i++)
2550  s2->er.error_count += s2->thread_context[i]->er.error_count;
2551  s->slice_count = 0;
2552  }
2553  if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2554  ret = mpeg_decode_postinit(avctx);
2555  if (ret < 0) {
2556  av_log(avctx, AV_LOG_ERROR,
2557  "mpeg_decode_postinit() failure\n");
2558  return ret;
2559  }
2560 
2561  /* We have a complete image: we try to decompress it. */
2562  if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2563  s2->pict_type = 0;
2564  s->first_slice = 1;
2565  last_code = PICTURE_START_CODE;
2566  } else {
2567  av_log(avctx, AV_LOG_ERROR,
2568  "ignoring pic after %X\n", last_code);
2569  if (avctx->err_recognition & AV_EF_EXPLODE)
2570  return AVERROR_INVALIDDATA;
2571  }
2572  break;
2573  case EXT_START_CODE:
2574  init_get_bits(&s2->gb, buf_ptr, input_size * 8);
2575 
2576  switch (get_bits(&s2->gb, 4)) {
2577  case 0x1:
2578  if (last_code == 0) {
2580  } else {
2581  av_log(avctx, AV_LOG_ERROR,
2582  "ignoring seq ext after %X\n", last_code);
2583  if (avctx->err_recognition & AV_EF_EXPLODE)
2584  return AVERROR_INVALIDDATA;
2585  }
2586  break;
2587  case 0x2:
2589  break;
2590  case 0x3:
2592  break;
2593  case 0x7:
2595  break;
2596  case 0x8:
2597  if (last_code == PICTURE_START_CODE) {
2599  } else {
2600  av_log(avctx, AV_LOG_ERROR,
2601  "ignoring pic cod ext after %X\n", last_code);
2602  if (avctx->err_recognition & AV_EF_EXPLODE)
2603  return AVERROR_INVALIDDATA;
2604  }
2605  break;
2606  }
2607  break;
2608  case USER_START_CODE:
2609  mpeg_decode_user_data(avctx, buf_ptr, input_size);
2610  break;
2611  case GOP_START_CODE:
2612  if (last_code == 0) {
2613  s2->first_field = 0;
2614  mpeg_decode_gop(avctx, buf_ptr, input_size);
2615  s->sync = 1;
2616  } else {
2617  av_log(avctx, AV_LOG_ERROR,
2618  "ignoring GOP_START_CODE after %X\n", last_code);
2619  if (avctx->err_recognition & AV_EF_EXPLODE)
2620  return AVERROR_INVALIDDATA;
2621  }
2622  break;
2623  default:
2624  if (start_code >= SLICE_MIN_START_CODE &&
2625  start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2626  if (s2->progressive_sequence && !s2->progressive_frame) {
2627  s2->progressive_frame = 1;
2628  av_log(s2->avctx, AV_LOG_ERROR,
2629  "interlaced frame in progressive sequence, ignoring\n");
2630  }
2631 
2632  if (s2->picture_structure == 0 ||
2634  av_log(s2->avctx, AV_LOG_ERROR,
2635  "picture_structure %d invalid, ignoring\n",
2636  s2->picture_structure);
2638  }
2639 
2641  av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2642 
2643  if (s2->picture_structure == PICT_FRAME) {
2644  s2->first_field = 0;
2645  s2->v_edge_pos = 16 * s2->mb_height;
2646  } else {
2647  s2->first_field ^= 1;
2648  s2->v_edge_pos = 8 * s2->mb_height;
2649  memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2650  }
2651  }
2652  if (start_code >= SLICE_MIN_START_CODE &&
2653  start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2654  const int field_pic = s2->picture_structure != PICT_FRAME;
2655  int mb_y = start_code - SLICE_MIN_START_CODE;
2656  last_code = SLICE_MIN_START_CODE;
2657  if (s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2658  mb_y += (*buf_ptr&0xE0)<<2;
2659 
2660  mb_y <<= field_pic;
2662  mb_y++;
2663 
2664  if (buf_end - buf_ptr < 2) {
2665  av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2666  return AVERROR_INVALIDDATA;
2667  }
2668 
2669  if (mb_y >= s2->mb_height) {
2670  av_log(s2->avctx, AV_LOG_ERROR,
2671  "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2672  return AVERROR_INVALIDDATA;
2673  }
2674 
2675  if (!s2->last_picture_ptr) {
2676  /* Skip B-frames if we do not have reference frames and
2677  * GOP is not closed. */
2678  if (s2->pict_type == AV_PICTURE_TYPE_B) {
2679  if (!s2->closed_gop) {
2680  skip_frame = 1;
2681  break;
2682  }
2683  }
2684  }
2686  s->sync = 1;
2687  if (!s2->next_picture_ptr) {
2688  /* Skip P-frames if we do not have a reference frame or
2689  * we have an invalid header. */
2690  if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2691  skip_frame = 1;
2692  break;
2693  }
2694  }
2695  if ((avctx->skip_frame >= AVDISCARD_NONREF &&
2696  s2->pict_type == AV_PICTURE_TYPE_B) ||
2697  (avctx->skip_frame >= AVDISCARD_NONKEY &&
2698  s2->pict_type != AV_PICTURE_TYPE_I) ||
2699  avctx->skip_frame >= AVDISCARD_ALL) {
2700  skip_frame = 1;
2701  break;
2702  }
2703 
2704  if (!s->mpeg_enc_ctx_allocated)
2705  break;
2706 
2707  if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2708  if (mb_y < avctx->skip_top ||
2709  mb_y >= s2->mb_height - avctx->skip_bottom)
2710  break;
2711  }
2712 
2713  if (!s2->pict_type) {
2714  av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2715  if (avctx->err_recognition & AV_EF_EXPLODE)
2716  return AVERROR_INVALIDDATA;
2717  break;
2718  }
2719 
2720  if (s->first_slice) {
2721  skip_frame = 0;
2722  s->first_slice = 0;
2723  if ((ret = mpeg_field_start(s2, buf, buf_size)) < 0)
2724  return ret;
2725  }
2726  if (!s2->current_picture_ptr) {
2727  av_log(avctx, AV_LOG_ERROR,
2728  "current_picture not initialized\n");
2729  return AVERROR_INVALIDDATA;
2730  }
2731 
2732 #if FF_API_VDPAU
2733  if (uses_vdpau(avctx)) {
2734  s->slice_count++;
2735  break;
2736  }
2737 #endif
2738 
2739  if (HAVE_THREADS &&
2740  (avctx->active_thread_type & FF_THREAD_SLICE) &&
2741  !avctx->hwaccel) {
2742  int threshold = (s2->mb_height * s->slice_count +
2743  s2->slice_context_count / 2) /
2744  s2->slice_context_count;
2745  av_assert0(avctx->thread_count > 1);
2746  if (threshold <= mb_y) {
2747  MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2748 
2749  thread_context->start_mb_y = mb_y;
2750  thread_context->end_mb_y = s2->mb_height;
2751  if (s->slice_count) {
2752  s2->thread_context[s->slice_count - 1]->end_mb_y = mb_y;
2753  ret = ff_update_duplicate_context(thread_context, s2);
2754  if (ret < 0)
2755  return ret;
2756  }
2757  init_get_bits(&thread_context->gb, buf_ptr, input_size * 8);
2758  s->slice_count++;
2759  }
2760  buf_ptr += 2; // FIXME add minimum number of bytes per slice
2761  } else {
2762  ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2763  emms_c();
2764 
2765  if (ret < 0) {
2766  if (avctx->err_recognition & AV_EF_EXPLODE)
2767  return ret;
2768  if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2769  ff_er_add_slice(&s2->er, s2->resync_mb_x,
2770  s2->resync_mb_y, s2->mb_x, s2->mb_y,
2772  } else {
2773  ff_er_add_slice(&s2->er, s2->resync_mb_x,
2774  s2->resync_mb_y, s2->mb_x - 1, s2->mb_y,
2776  }
2777  }
2778  }
2779  break;
2780  }
2781  }
2782 }
2783 
2784 static int mpeg_decode_frame(AVCodecContext *avctx, void *data,
2785  int *got_output, AVPacket *avpkt)
2786 {
2787  const uint8_t *buf = avpkt->data;
2788  int ret;
2789  int buf_size = avpkt->size;
2790  Mpeg1Context *s = avctx->priv_data;
2791  AVFrame *picture = data;
2793 
2794  if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2795  /* special case for last picture */
2796  if (s2->low_delay == 0 && s2->next_picture_ptr) {
2797  int ret = av_frame_ref(picture, s2->next_picture_ptr->f);
2798  if (ret < 0)
2799  return ret;
2800 
2801  s2->next_picture_ptr = NULL;
2802 
2803  *got_output = 1;
2804  }
2805  return buf_size;
2806  }
2807 
2808  if (s2->avctx->flags & AV_CODEC_FLAG_TRUNCATED) {
2809  int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf,
2810  buf_size, NULL);
2811 
2812  if (ff_combine_frame(&s2->parse_context, next,
2813  (const uint8_t **) &buf, &buf_size) < 0)
2814  return buf_size;
2815  }
2816 
2817  s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2818  if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2819  || s2->codec_tag == AV_RL32("BW10")
2820  ))
2821  vcr2_init_sequence(avctx);
2822 
2823  s->slice_count = 0;
2824 
2825  if (avctx->extradata && !s->extradata_decoded) {
2826  ret = decode_chunks(avctx, picture, got_output,
2827  avctx->extradata, avctx->extradata_size);
2828  if (*got_output) {
2829  av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2830  *got_output = 0;
2831  }
2832  s->extradata_decoded = 1;
2833  if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2834  s2->current_picture_ptr = NULL;
2835  return ret;
2836  }
2837  }
2838 
2839  ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2840  if (ret<0 || *got_output) {
2841  s2->current_picture_ptr = NULL;
2842 
2843  if (s2->timecode_frame_start != -1 && *got_output) {
2844  AVFrameSideData *tcside = av_frame_new_side_data(picture,
2846  sizeof(int64_t));
2847  if (!tcside)
2848  return AVERROR(ENOMEM);
2849  memcpy(tcside->data, &s2->timecode_frame_start, sizeof(int64_t));
2850 
2851  s2->timecode_frame_start = -1;
2852  }
2853  }
2854 
2855  return ret;
2856 }
2857 
2858 static void flush(AVCodecContext *avctx)
2859 {
2860  Mpeg1Context *s = avctx->priv_data;
2861 
2862  s->sync = 0;
2863 
2864  ff_mpeg_flush(avctx);
2865 }
2866 
2868 {
2869  Mpeg1Context *s = avctx->priv_data;
2870 
2871  if (s->mpeg_enc_ctx_allocated)
2873  av_freep(&s->a53_caption);
2874  return 0;
2875 }
2876 
2878  .name = "mpeg1video",
2879  .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2880  .type = AVMEDIA_TYPE_VIDEO,
2881  .id = AV_CODEC_ID_MPEG1VIDEO,
2882  .priv_data_size = sizeof(Mpeg1Context),
2884  .close = mpeg_decode_end,
2889  .flush = flush,
2890  .max_lowres = 3,
2891  .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2892 };
2893 
2895  .name = "mpeg2video",
2896  .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2897  .type = AVMEDIA_TYPE_VIDEO,
2898  .id = AV_CODEC_ID_MPEG2VIDEO,
2899  .priv_data_size = sizeof(Mpeg1Context),
2901  .close = mpeg_decode_end,
2906  .flush = flush,
2907  .max_lowres = 3,
2909 };
2910 
2911 //legacy decoder
2913  .name = "mpegvideo",
2914  .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2915  .type = AVMEDIA_TYPE_VIDEO,
2916  .id = AV_CODEC_ID_MPEG2VIDEO,
2917  .priv_data_size = sizeof(Mpeg1Context),
2919  .close = mpeg_decode_end,
2922  .flush = flush,
2923  .max_lowres = 3,
2924 };
2925 
2926 #if FF_API_XVMC
2927 #if CONFIG_MPEG_XVMC_DECODER
2929 static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx)
2930 {
2931  if (avctx->active_thread_type & FF_THREAD_SLICE)
2932  return -1;
2933  if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
2934  return -1;
2935  if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
2936  ff_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2937  }
2938  mpeg_decode_init(avctx);
2939 
2941  avctx->xvmc_acceleration = 2; // 2 - the blocks are packed!
2942 
2943  return 0;
2944 }
2945 
2946 AVCodec ff_mpeg_xvmc_decoder = {
2947  .name = "mpegvideo_xvmc",
2948  .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2949  .type = AVMEDIA_TYPE_VIDEO,
2950  .id = AV_CODEC_ID_MPEG2VIDEO_XVMC,
2951  .priv_data_size = sizeof(Mpeg1Context),
2952  .init = mpeg_mc_decode_init,
2953  .close = mpeg_decode_end,
2956  AV_CODEC_CAP_TRUNCATED | CODEC_CAP_HWACCEL |
2958  .flush = flush,
2959 };
2961 #endif
2962 #endif /* FF_API_XVMC */
2963 
2964 #if CONFIG_MPEG_VDPAU_DECODER && FF_API_VDPAU
2965 AVCodec ff_mpeg_vdpau_decoder = {
2966  .name = "mpegvideo_vdpau",
2967  .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
2968  .type = AVMEDIA_TYPE_VIDEO,
2969  .id = AV_CODEC_ID_MPEG2VIDEO,
2970  .priv_data_size = sizeof(Mpeg1Context),
2972  .close = mpeg_decode_end,
2974  .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_TRUNCATED |
2976  .flush = flush,
2977 };
2978 #endif
2979 
2980 #if CONFIG_MPEG1_VDPAU_DECODER && FF_API_VDPAU
2981 AVCodec ff_mpeg1_vdpau_decoder = {
2982  .name = "mpeg1video_vdpau",
2983  .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),
2984  .type = AVMEDIA_TYPE_VIDEO,
2985  .id = AV_CODEC_ID_MPEG1VIDEO,
2986  .priv_data_size = sizeof(Mpeg1Context),
2988  .close = mpeg_decode_end,
2990  .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_TRUNCATED |
2992  .flush = flush,
2993 };
2994 #endif
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
#define AV_EF_AGGRESSIVE
consider things that a sane encoder should not do as an error
Definition: avcodec.h:2827
#define ff_tlog(ctx,...)
Definition: internal.h:65
IDCTDSPContext idsp
Definition: mpegvideo.h:227
#define NULL
Definition: coverity.c:32
const struct AVCodec * codec
Definition: avcodec.h:1541
AVRational framerate
Definition: avcodec.h:3212
#define MB_TYPE_SKIP
Definition: avcodec.h:1151
const char const char void * val
Definition: avisynth_c.h:634
discard all frames except keyframes
Definition: avcodec.h:687
int8_t * ref_index[2]
Definition: mpegpicture.h:62
void ff_init_block_index(MpegEncContext *s)
Definition: mpegvideo.c:2739
int64_t timecode_frame_start
GOP timecode frame start number, in non drop frame format.
Definition: mpegvideo.h:459
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:3560
int aspect_ratio_info
Definition: mpegvideo.h:400
int picture_number
Definition: mpegvideo.h:124
const char * s
Definition: avisynth_c.h:631
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define SLICE_MAX_START_CODE
Definition: cavs.h:32
#define SLICE_FLAG_ALLOW_FIELD
allow draw_horiz_band() with field slices (MPEG2 field pics)
Definition: avcodec.h:2068
static int shift(int a, int b)
Definition: sonic.c:82
mpeg2/4 4:2:0, h264 default for 4:2:0
Definition: pixfmt.h:464
This structure describes decoded (raw) audio or video data.
Definition: frame.h:181
static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm, const uint8_t *new_perm)
Definition: mpeg12dec.c:1170
#define GET_RL_VLC
Definition: get_bits.h:708
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
int start_mb_y
start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y) ...
Definition: mpegvideo.h:150
#define MV_TYPE_FIELD
2 vectors, one per field
Definition: mpegvideo.h:269
int last_mv[2][2][2]
last MV, used for MV prediction in MPEG1 & B-frame MPEG4
Definition: mpegvideo.h:278
int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
Definition: mpeg12dec.c:219
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:1726
AVFormatContext * ctx
Definition: movenc-test.c:48
static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
Definition: mpeg12dec.c:1511
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:68
misc image utilities
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:260
#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:145
MPEG-2 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstr...
Definition: pixfmt.h:107
int64_t bit_rate
the average bitrate
Definition: avcodec.h:1597
#define FF_IDCT_SIMPLE
Definition: avcodec.h:2885
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:209
uint8_t afd
Definition: mpeg12dec.c:62
hardware decoding through Videotoolbox
Definition: pixfmt.h:290
int end_mb_y
end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y) ...
Definition: mpegvideo.h:151
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
uint8_t * a53_caption
Definition: mpeg12dec.c:60
uint16_t chroma_intra_matrix[64]
Definition: mpegvideo.h:301
int height
Definition: avcodec.h:1183
int v_edge_pos
horizontal / vertical position of the right/bottom edge (pixel replication)
Definition: mpegvideo.h:129
uint16_t chroma_inter_matrix[64]
Definition: mpegvideo.h:303
void ff_er_frame_end(ERContext *s)
static int mpeg2_fast_decode_block_non_intra(MpegEncContext *s, int16_t *block, int n)
Note: this function can read out of range and crash for corrupt streams.
Definition: mpeg12dec.c:476
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: avcodec.h:2262
int num
numerator
Definition: rational.h:44
int repeat_pict
When decoding, this signals how much the picture must be delayed.
Definition: frame.h:307
int size
Definition: avcodec.h:1468
enum AVCodecID codec_id
Definition: mpegvideo.h:109
#define AV_EF_COMPLIANT
consider all spec non compliances as errors
Definition: avcodec.h:2826
void(* clear_blocks)(int16_t *blocks)
Definition: blockdsp.h:36
static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
Definition: mpeg12dec.c:1606
const uint8_t * buffer
Definition: get_bits.h:55
void ff_mpeg1_clean_buffers(MpegEncContext *s)
Definition: mpeg12.c:123
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:1935
#define MB_TYPE_INTRA
Definition: mpegutils.h:75
AVCodec ff_mpeg1video_decoder
Definition: mpeg12dec.c:2877
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:1752
#define tc
Definition: regdef.h:69
static int av_cmp_q(AVRational a, AVRational b)
Compare two rationals.
Definition: rational.h:66
static av_cold int mpeg_decode_init(AVCodecContext *avctx)
Definition: mpeg12dec.c:1114
#define MB_TYPE_QUANT
Definition: avcodec.h:1159
#define AV_EF_BITSTREAM
detect bitstream specification deviations
Definition: avcodec.h:2820
mpegvideo header.
#define HAS_CBP(a)
Definition: mpegutils.h:103
discard all
Definition: avcodec.h:688
uint8_t permutated[64]
Definition: idctdsp.h:31
uint8_t run
Definition: svq3.c:149
#define ER_MV_ERROR
static void mpeg_decode_gop(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
Definition: mpeg12dec.c:2416
#define SLICE_MIN_START_CODE
Definition: mpegvideo.h:70
int profile
profile
Definition: avcodec.h:3028
Views are next to each other.
Definition: stereo3d.h:45
AVCodec.
Definition: avcodec.h:3392
static int get_dmv(MpegEncContext *s)
Definition: mpeg12dec.c:704
int qscale
QP.
Definition: mpegvideo.h:201
RLTable.
Definition: rl.h:38
static int get_sbits(GetBitContext *s, int n)
Definition: get_bits.h:245
int chroma_x_shift
Definition: mpegvideo.h:475
int encoding
true if we are encoding (vs decoding)
Definition: mpegvideo.h:111
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:3139
const uint8_t ff_mpeg2_non_linear_qscale[32]
Definition: mpegvideodata.c:27
struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:2843
#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:881
#define USES_LIST(a, list)
Definition: mpegutils.h:101
#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:2732
#define MBINCR_VLC_BITS
Definition: mpeg12vlc.h:37
static const uint32_t ptype2mb_type[7]
Definition: mpeg12dec.c:76
uint8_t
#define av_cold
Definition: attributes.h:82
#define av_malloc(s)
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:63
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:123
enum OutputFormat out_format
output format
Definition: mpegvideo.h:101
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:2764
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
const float ff_mpeg1_aspect[16]
Definition: mpeg12data.c:394
Multithreading support functions.
#define AV_CODEC_FLAG_LOW_DELAY
Force low delay.
Definition: avcodec.h:779
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:375
static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra)
Definition: mpeg12dec.c:1569
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1647
int full_pel[2]
Definition: mpegvideo.h:479
int interlaced_dct
Definition: mpegvideo.h:480
void ff_mpv_decode_mb(MpegEncContext *s, int16_t block[12][64])
Definition: mpegvideo.c:2720
static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
Definition: mpeg12dec.c:1238
static int mpeg1_fast_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
Note: this function can read out of range and crash for corrupt streams.
Definition: mpeg12dec.c:309
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
Picture current_picture
copy of the current picture structure.
Definition: mpegvideo.h:177
int first_slice
Definition: mpeg12dec.c:70
The data is the AVPanScan struct defined in libavcodec.
Definition: frame.h:52
int intra_dc_precision
Definition: mpegvideo.h:460
int repeat_first_field
Definition: mpegvideo.h:469
void ff_xvmc_init_block(MpegEncContext *s)
Initialize the block field of the MpegEncContext pointer passed as parameter after making sure that t...
Structure to hold side data for an AVFrame.
Definition: frame.h:144
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:266
#define PICT_BOTTOM_FIELD
Definition: mpegutils.h:38
uint8_t * data
Definition: avcodec.h:1467
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:212
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 AV_CODEC_CAP_HWACCEL_VDPAU
Codec can export data for HW decoding (VDPAU).
Definition: avcodec.h:892
#define ER_MV_END
#define ff_dlog(a,...)
MPEG-1 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstr...
Definition: pixfmt.h:106
av_cold void ff_mpv_idct_init(MpegEncContext *s)
Definition: mpegvideo.c:330
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:126
int lowres
low resolution decoding, 1-> 1/2 size, 2->1/4 size
Definition: avcodec.h:2934
int codec_tag
internal codec_tag upper case converted from avctx codec_tag
Definition: mpegvideo.h:117
void ff_thread_finish_setup(AVCodecContext *avctx)
If the codec defines update_thread_context(), call this when they are ready for the next thread to st...
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:762
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:135
enum AVChromaLocation chroma_sample_location
This defines the location of chroma samples.
Definition: avcodec.h:2269
#define FFALIGN(x, a)
Definition: macros.h:48
#define av_log(a,...)
void ff_vdpau_mpeg_picture_complete(MpegEncContext *s, const uint8_t *buf, int buf_size, int slice_count)
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:2883
unsigned m
Definition: audioconvert.c:187
static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
Definition: mpeg12dec.c:1259
Libavcodec version macros.
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:607
enum AVCodecID id
Definition: avcodec.h:3406
int slice_context_count
number of used thread_contexts
Definition: mpegvideo.h:153
int extradata_decoded
Definition: mpeg12dec.c:71
#define UPDATE_CACHE(name, gb)
Definition: get_bits.h:173
#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:1846
int last_dc[3]
last DC values for MPEG1
Definition: mpegvideo.h:182
#define s2
Definition: regdef.h:39
void ff_er_add_slice(ERContext *s, int startx, int starty, int endx, int endy, int status)
Add a slice.
#define MT_FIELD
Definition: mpeg12dec.c:723
#define PTRDIFF_SPECIFIER
Definition: internal.h:250
int mb_skipped
MUST BE SET only during DECODING.
Definition: mpegvideo.h:192
int chroma_y_shift
Definition: mpegvideo.h:476
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:243
#define AVERROR(e)
Definition: error.h:43
static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
Definition: mpeg12dec.c:1468
#define FF_API_VDPAU
Definition: version.h:96
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
ERContext er
Definition: mpegvideo.h:550
static int mpeg1_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
Definition: mpeg12dec.c:224
int active_thread_type
Which multithreading methods are in use by the codec.
Definition: avcodec.h:2973
AVCodec ff_mpegvideo_decoder
Definition: mpeg12dec.c:2912
AVRational av_div_q(AVRational b, AVRational c)
Divide one rational by another.
Definition: rational.c:88
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
ATSC A53 Part 4 Closed Captions.
Definition: frame.h:58
static int get_qscale(MpegEncContext *s)
Definition: mpeg12dec.c:712
const char * arg
Definition: jacosubdec.c:66
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1627
#define wrap(func)
Definition: neontest.h:65
#define SEQ_END_CODE
Definition: mpegvideo.h:66
#define PICT_TOP_FIELD
Definition: mpegutils.h:37
const char * name
Name of the codec implementation.
Definition: avcodec.h:3399
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:1182
int low_delay
no reordering needed / has no b-frames
Definition: mpegvideo.h:404
static void mpeg_decode_user_data(AVCodecContext *avctx, const uint8_t *p, int buf_size)
Definition: mpeg12dec.c:2341
GetBitContext gb
Definition: mpegvideo.h:445
The GOP timecode in 25 bit timecode format.
Definition: frame.h:124
#define CLOSE_READER(name, gb)
Definition: get_bits.h:144
void ff_mpv_common_end(MpegEncContext *s)
Definition: mpegvideo.c:1116
VLC ff_mb_pat_vlc
Definition: mpeg12.c:143
#define FFMAX(a, b)
Definition: common.h:94
static int decode_dc(GetBitContext *gb, int component)
Definition: mpeg12.h:32
int repeat_field
Definition: mpeg12dec.c:56
attribute_deprecated int64_t timecode_frame_start
Definition: avcodec.h:2635
#define DECODE_SLICE_ERROR
Definition: mpeg12dec.c:1765
static int check_marker(GetBitContext *s, const char *msg)
Definition: get_bits.h:401
#define DECODE_SLICE_OK
Definition: mpeg12dec.c:1766
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:67
void ff_mpeg_flush(AVCodecContext *avctx)
Definition: mpegvideo.c:2771
#define SKIP_BITS(name, gb, num)
Definition: get_bits.h:188
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:215
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:2500
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
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:1665
int intra_vlc_format
Definition: mpegvideo.h:466
const AVProfile ff_mpeg2_video_profiles[]
Definition: profiles.c:84
#define AV_CODEC_CAP_DRAW_HORIZ_BAND
Decoder can use draw_horiz_band callback.
Definition: avcodec.h:850
static int mpeg2_decode_block_non_intra(MpegEncContext *s, int16_t *block, int n)
Definition: mpeg12dec.c:389
int ff_mpv_export_qp_table(MpegEncContext *s, AVFrame *f, Picture *p, int qp_type)
Definition: mpegvideo.c:1968
int progressive_frame
Definition: mpegvideo.h:478
AVRational av_d2q(double d, int max)
Convert a double precision floating point number to a rational.
Definition: rational.c:106
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:252
#define MB_PAT_VLC_BITS
Definition: mpeg12vlc.h:38
int top_field_first
Definition: mpegvideo.h:462
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:2811
#define FF_THREAD_FRAME
Decode more than one frame at once.
Definition: avcodec.h:2965
#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:2234
uint8_t * mbskip_table
used to avoid copy if macroblock skipped (for black regions for example) and used for b-frame encodin...
Definition: mpegvideo.h:193
int idct_algo
IDCT algorithm, see FF_IDCT_* below.
Definition: avcodec.h:2882
#define MB_TYPE_INTERLACED
Definition: avcodec.h:1147
int16_t(*[2] motion_val)[2]
Definition: mpegpicture.h:53
Picture * current_picture_ptr
pointer to the current picture
Definition: mpegvideo.h:181
void ff_mpeg_er_frame_start(MpegEncContext *s)
Definition: mpeg_er.c:46
#define ER_DC_END
static int mpeg_decode_a53_cc(AVCodecContext *avctx, const uint8_t *p, int buf_size)
Definition: mpeg12dec.c:2288
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:466
int alternate_scan
Definition: mpegvideo.h:467
int save_height
Definition: mpeg12dec.c:66
#define MB_BTYPE_VLC_BITS
Definition: mpeg12vlc.h:40
#define GOP_START_CODE
Definition: mpegvideo.h:68
int32_t
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:2241
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:295
int a53_caption_size
Definition: mpeg12dec.c:61
#define MB_TYPE_L0L1
Definition: avcodec.h:1158
#define FF_THREAD_SLICE
Decode more than one part of a single frame at once.
Definition: avcodec.h:2966
int level
level
Definition: avcodec.h:3117
#define LAST_SKIP_BITS(name, gb, num)
Definition: get_bits.h:194
static av_cold int mpeg_decode_end(AVCodecContext *avctx)
Definition: mpeg12dec.c:2867
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:574
static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
Definition: mpeg12dec.c:1592
int16_t(*[12] pblocks)[64]
Definition: mpegvideo.h:495
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:83
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2822
int n
Definition: avisynth_c.h:547
uint8_t idct_permutation[64]
IDCT input permutation.
Definition: idctdsp.h:94
int ticks_per_frame
For some codecs, the time base is closer to the field rate than the frame rate.
Definition: avcodec.h:1670
int mpeg_f_code[2][2]
Definition: mpegvideo.h:454
#define EXT_START_CODE
Definition: cavs.h:33
#define MB_TYPE_L1
Definition: avcodec.h:1157
int mpeg_enc_ctx_allocated
Definition: mpeg12dec.c:55
#define check_scantable_index(ctx, x)
Definition: mpeg12dec.c:127
int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
Definition: mpegvideo.c:483
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:106
RL_VLC_ELEM * rl_vlc[32]
decoding only
Definition: rl.h:47
#define SHOW_UBITS(name, gb, num)
Definition: get_bits.h:206
void ff_mpv_decode_defaults(MpegEncContext *s)
Set the given MpegEncContext to defaults for decoding.
Definition: mpegvideo.c:657
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:2954
static int mpeg1_decode_sequence(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
Definition: mpeg12dec.c:2145
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:481
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:923
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:461
static int mpeg2_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
Definition: mpeg12dec.c:541
enum AVStereo3DType type
How views are packed within the video.
Definition: stereo3d.h:127
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:1196
int concealment_motion_vectors
Definition: mpegvideo.h:463
struct MpegEncContext * thread_context[MAX_THREADS]
Definition: mpegvideo.h:152
Libavcodec external API header.
AVRational frame_rate_ext
Definition: mpeg12dec.c:67
enum AVCodecID codec_id
Definition: avcodec.h:1549
BlockDSPContext bdsp
Definition: mpegvideo.h:223
static int mpeg2_fast_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
Note: this function can read out of range and crash for corrupt streams.
Definition: mpeg12dec.c:627
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:209
Views are next to each other, but when upscaling apply a checkerboard pattern.
Definition: stereo3d.h:87
#define AV_CODEC_FLAG2_FAST
Allow non spec compliant speedup tricks.
Definition: avcodec.h:802
int debug
debug
Definition: avcodec.h:2763
#define MB_PTYPE_VLC_BITS
Definition: mpeg12vlc.h:39
main external API structure.
Definition: avcodec.h:1532
ScanTable intra_scantable
Definition: mpegvideo.h:88
#define USER_START_CODE
Definition: cavs.h:34
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:97
#define IS_QUANT(a)
Definition: mpegutils.h:97
MPEG1/2 tables.
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1564
#define OPEN_READER(name, gb)
Definition: get_bits.h:133
uint8_t * data
Definition: frame.h:146
#define MV_TYPE_16X8
2 vectors, one per 16x8 block
Definition: mpegvideo.h:268
int chroma_420_type
Definition: mpegvideo.h:470
void * buf
Definition: avisynth_c.h:553
static int mpeg_decode_slice(MpegEncContext *s, int mb_y, const uint8_t **buf, int buf_size)
Decode a slice.
Definition: mpeg12dec.c:1774
void ff_print_debug_info(MpegEncContext *s, Picture *p, AVFrame *pict)
Definition: mpegvideo.c:1961
int extradata_size
Definition: avcodec.h:1648
int progressive_sequence
Definition: mpegvideo.h:453
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:312
BYTE int const BYTE int int int height
Definition: avisynth_c.h:676
static void skip_bits1(GetBitContext *s)
Definition: get_bits.h:337
int slice_flags
slice flags
Definition: avcodec.h:2066
int coded_height
Definition: avcodec.h:1726
#define FF_CODEC_PROPERTY_CLOSED_CAPTIONS
Definition: avcodec.h:3347
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:305
AVFrameSideData * av_frame_new_side_data(AVFrame *frame, enum AVFrameSideDataType type, int size)
Add a new side data to a frame.
Definition: frame.c:601
int closed_gop
MPEG1/2 GOP is closed.
Definition: mpegvideo.h:208
int has_stereo3d
Definition: mpeg12dec.c:59
VLC ff_mb_ptype_vlc
Definition: mpeg12.c:141
unsigned int avpriv_toupper4(unsigned int x)
Definition: utils.c:3374
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:2255
rational number numerator/denominator
Definition: rational.h:43
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:2248
struct AVFrame * f
Definition: mpegpicture.h:46
HW acceleration through VDPAU, Picture.data[3] contains a VdpVideoSurface.
Definition: pixfmt.h:209
static enum AVPixelFormat mpeg12_pixfmt_list_422[]
Definition: mpeg12dec.c:1222
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:418
#define GET_CACHE(name, gb)
Definition: get_bits.h:210
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:186
#define MB_TYPE_16x16
Definition: avcodec.h:1143
int save_progressive_seq
Definition: mpeg12dec.c:66
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:98
static int mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
Definition: mpeg12dec.c:136
#define MT_DMV
Definition: mpeg12dec.c:726
enum AVPixelFormat ff_thread_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
Wrapper around get_format() for frame-multithreaded codecs.
#define s1
Definition: regdef.h:38
int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx)
generic function called after decoding the header and before a frame is decoded.
Definition: mpegvideo.c:1190
attribute_deprecated int dtg_active_format
DTG active format information (additional aspect ratio information only used in DVB MPEG-2 transport ...
Definition: avcodec.h:2029
#define ER_DC_ERROR
HW decoding through DXVA2, Picture.data[3] contains a LPDIRECT3DSURFACE9 pointer. ...
Definition: pixfmt.h:149
static int mpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_output, AVPacket *avpkt)
Definition: mpeg12dec.c:2784
#define MV_DIR_FORWARD
Definition: mpegvideo.h:262
static int decode_chunks(AVCodecContext *avctx, AVFrame *picture, int *got_output, const uint8_t *buf, int buf_size)
Definition: mpeg12dec.c:2449
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:209
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:262
static const uint8_t start_code[]
Definition: h264.c:1298
av_cold void ff_mpeg12_common_init(MpegEncContext *s)
Definition: mpeg12.c:115
#define AV_CODEC_CAP_TRUNCATED
Definition: avcodec.h:857
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:138
int skip_bottom
Number of macroblock rows at the bottom which are skipped.
Definition: avcodec.h:2148
static int flags
Definition: cpu.c:47
AVStereo3D * av_stereo3d_create_side_data(AVFrame *frame)
Allocate a complete AVFrameSideData and add it to the frame.
Definition: stereo3d.c:32
Pan Scan area.
Definition: avcodec.h:1169
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:192
uint8_t level
Definition: svq3.c:150
int mv[2][4][2]
motion vectors for a macroblock first coordinate : 0 = forward 1 = backward second " : depend...
Definition: mpegvideo.h:276
int b8_stride
2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
Definition: mpegvideo.h:128
the normal 219*2^(n-8) "MPEG" YUV ranges
Definition: pixfmt.h:442
MpegEncContext.
Definition: mpegvideo.h:78
Picture * next_picture_ptr
pointer to the next picture (for bidir pred)
Definition: mpegvideo.h:180
struct AVCodecContext * avctx
Definition: mpegvideo.h:95
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:572
#define SHOW_SBITS(name, gb, num)
Definition: get_bits.h:207
#define MB_TYPE_CBP
Definition: avcodec.h:1160
#define AV_PIX_FMT_XVMC
Definition: pixfmt.h:81
discard all non reference
Definition: avcodec.h:684
const AVRational ff_mpeg2_aspect[16]
Definition: mpeg12data.c:415
static const AVProfile profiles[]
Definition: libfaac.c:216
volatile int error_count
static enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[]
Definition: mpeg12dec.c:1182
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:63
Y , 8bpp.
Definition: pixfmt.h:71
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:80
common internal api header.
int mb_stride
mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11 ...
Definition: mpegvideo.h:127
void ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx)
Definition: mpegvideo.c:662
if(ret< 0)
Definition: vf_mcdeint.c:282
AVCodec ff_mpeg2video_decoder
Definition: mpeg12dec.c:2894
#define TEX_VLC_BITS
Definition: dv.h:93
static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
Definition: mpeg12dec.c:728
uint8_t * dest[3]
Definition: mpegvideo.h:295
Video is not stereoscopic (and metadata has to be there).
Definition: stereo3d.h:35
static double c[64]
const uint8_t * buffer_end
Definition: get_bits.h:55
static void flush(AVCodecContext *avctx)
Definition: mpeg12dec.c:2858
VLC ff_mbincr_vlc
Definition: mpeg12.c:140
Picture * last_picture_ptr
pointer to the previous picture.
Definition: mpegvideo.h:179
Bi-dir predicted.
Definition: avutil.h:268
static int mpeg1_decode_picture(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
Definition: mpeg12dec.c:1421
unsigned properties
Definition: avcodec.h:3345
int den
denominator
Definition: rational.h:45
const uint8_t ff_alternate_vertical_scan[64]
#define MB_TYPE_16x8
Definition: avcodec.h:1144
int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src)
Definition: mpegvideo.c:455
AVStereo3D stereo3d
Definition: mpeg12dec.c:58
static int lowres
Definition: ffplay.c:334
#define IS_INTRA(x, y)
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2094
int16_t position[3][2]
position of the top left corner in 1/16 pel for up to 3 fields/frames
Definition: avcodec.h:1190
void * priv_data
Definition: avcodec.h:1574
#define PICT_FRAME
Definition: mpegutils.h:39
int frame_rate_index
Definition: mpegvideo.h:214
av_cold int ff_mpv_common_init(MpegEncContext *s)
init common structure for both encoder and decoder.
Definition: mpegvideo.c:878
static int mpeg_decode_postinit(AVCodecContext *avctx)
Definition: mpeg12dec.c:1285
static av_always_inline int diff(const uint32_t a, const uint32_t b)
int picture_structure
Definition: mpegvideo.h:457
float re
Definition: fft-test.c:73
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:2777
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:2994
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:81
void ff_mpv_frame_end(MpegEncContext *s)
Definition: mpegvideo.c:1422
#define MT_FRAME
Definition: mpeg12dec.c:724
#define MV_TYPE_DMV
2 vectors, special mpeg2 Dual Prime Vectors
Definition: mpegvideo.h:270
#define SEQ_START_CODE
Definition: mpegvideo.h:67
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:497
ParseContext parse_context
Definition: mpegvideo.h:362
#define FF_QSCALE_TYPE_MPEG2
Definition: avcodec.h:1233
VLC_TYPE(* table)[2]
code, bits
Definition: get_bits.h:65
int64_t bit_rate
wanted bit rate
Definition: mpegvideo.h:100
Views are on top of each other.
Definition: stereo3d.h:55
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:247
static const uint8_t * align_get_bits(GetBitContext *s)
Definition: get_bits.h:457
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:1634
MpegEncContext mpeg_enc_ctx
Definition: mpeg12dec.c:54
int slice_count
Definition: mpeg12dec.c:64
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> dc
#define SLICE_FLAG_CODED_ORDER
draw_horiz_band() is called in coded order instead of display
Definition: avcodec.h:2067
#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:771
#define AV_CODEC_FLAG2_SHOW_ALL
Show all frames before the first keyframe.
Definition: avcodec.h:830
uint16_t intra_matrix[64]
matrix transmitted in the bitstream
Definition: mpegvideo.h:300
uint32_t * mb_type
types and macros are defined in mpegutils.h
Definition: mpegpicture.h:56
#define av_freep(p)
ScanTable inter_scantable
if inter == intra then intra should be used to reduce tha cache usage
Definition: mpegvideo.h:87
#define PICTURE_START_CODE
Definition: mpegvideo.h:69
static int skip_1stop_8data_bits(GetBitContext *gb)
Definition: get_bits.h:612
HW decoding through Direct3D11, Picture.data[3] contains a ID3D11VideoDecoderOutputView pointer...
Definition: pixfmt.h:243
mpeg1 4:2:0, jpeg 4:2:0, h263 4:2:0
Definition: pixfmt.h:465
#define ER_AC_END
int(* decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
Callback for each slice.
Definition: avcodec.h:3574
static int slice_decode_thread(AVCodecContext *c, void *arg)
Definition: mpeg12dec.c:2043
int(* end_frame)(AVCodecContext *avctx)
Called at the end of each frame or field picture.
Definition: avcodec.h:3585
static enum AVPixelFormat mpeg12_pixfmt_list_444[]
Definition: mpeg12dec.c:1227
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
AVPixelFormat
Pixel format.
Definition: pixfmt.h:61
This structure stores compressed data.
Definition: avcodec.h:1444
void ff_mpv_report_decode_progress(MpegEncContext *s)
Definition: mpegvideo.c:2816
const AVRational ff_mpeg12_frame_rate_tab[16]
Definition: mpeg12data.c:308
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:856
#define MB_TYPE_L0
Definition: avcodec.h:1156
static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
Definition: mpeg12dec.c:1535
Predicted.
Definition: avutil.h:267
#define AV_TIMECODE_STR_SIZE
Definition: timecode.h:33
int64_t rc_max_rate
maximum bitrate
Definition: avcodec.h:2523
AVPanScan pan_scan
Definition: mpeg12dec.c:57
static int width
static int16_t block[64]
Definition: dct-test.c:112
VLC ff_mb_btype_vlc
Definition: mpeg12.c:142