mpeg12.c
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1 /*
2  * MPEG-1/2 decoder
3  * Copyright (c) 2000, 2001 Fabrice Bellard
4  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5  *
6  * This file is part of Libav.
7  *
8  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
28 //#define DEBUG
29 #include "internal.h"
30 #include "avcodec.h"
31 #include "dsputil.h"
32 #include "mpegvideo.h"
33 
34 #include "mpeg12.h"
35 #include "mpeg12data.h"
36 #include "mpeg12decdata.h"
37 #include "bytestream.h"
38 #include "vdpau_internal.h"
39 #include "xvmc_internal.h"
40 #include "thread.h"
41 
42 //#undef NDEBUG
43 //#include <assert.h>
44 
45 
46 #define MV_VLC_BITS 9
47 #define MBINCR_VLC_BITS 9
48 #define MB_PAT_VLC_BITS 9
49 #define MB_PTYPE_VLC_BITS 6
50 #define MB_BTYPE_VLC_BITS 6
51 
52 static VLC mv_vlc;
53 
54 /* as H.263, but only 17 codes */
55 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
56 {
57  int code, sign, val, shift;
58 
59  code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
60  if (code == 0) {
61  return pred;
62  }
63  if (code < 0) {
64  return 0xffff;
65  }
66 
67  sign = get_bits1(&s->gb);
68  shift = fcode - 1;
69  val = code;
70  if (shift) {
71  val = (val - 1) << shift;
72  val |= get_bits(&s->gb, shift);
73  val++;
74  }
75  if (sign)
76  val = -val;
77  val += pred;
78 
79  /* modulo decoding */
80  return sign_extend(val, 5 + shift);
81 }
82 
83 static inline int mpeg1_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n)
84 {
85  int level, dc, diff, i, j, run;
86  int component;
87  RLTable *rl = &ff_rl_mpeg1;
88  uint8_t * const scantable = s->intra_scantable.permutated;
89  const uint16_t *quant_matrix = s->intra_matrix;
90  const int qscale = s->qscale;
91 
92  /* DC coefficient */
93  component = (n <= 3 ? 0 : n - 4 + 1);
94  diff = decode_dc(&s->gb, component);
95  if (diff >= 0xffff)
96  return -1;
97  dc = s->last_dc[component];
98  dc += diff;
99  s->last_dc[component] = dc;
100  block[0] = dc * quant_matrix[0];
101  av_dlog(s->avctx, "dc=%d diff=%d\n", dc, diff);
102  i = 0;
103  {
104  OPEN_READER(re, &s->gb);
105  /* now quantify & encode AC coefficients */
106  for (;;) {
107  UPDATE_CACHE(re, &s->gb);
108  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
109 
110  if (level == 127) {
111  break;
112  } else if (level != 0) {
113  i += run;
114  j = scantable[i];
115  level = (level * qscale * quant_matrix[j]) >> 4;
116  level = (level - 1) | 1;
117  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
118  LAST_SKIP_BITS(re, &s->gb, 1);
119  } else {
120  /* escape */
121  run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
122  UPDATE_CACHE(re, &s->gb);
123  level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
124  if (level == -128) {
125  level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
126  } else if (level == 0) {
127  level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
128  }
129  i += run;
130  j = scantable[i];
131  if (level < 0) {
132  level = -level;
133  level = (level * qscale * quant_matrix[j]) >> 4;
134  level = (level - 1) | 1;
135  level = -level;
136  } else {
137  level = (level * qscale * quant_matrix[j]) >> 4;
138  level = (level - 1) | 1;
139  }
140  }
141  if (i > 63) {
142  av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
143  return -1;
144  }
145 
146  block[j] = level;
147  }
148  CLOSE_READER(re, &s->gb);
149  }
150  s->block_last_index[n] = i;
151  return 0;
152 }
153 
155 {
156  return mpeg1_decode_block_intra(s, block, n);
157 }
158 
159 static inline int mpeg1_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n)
160 {
161  int level, i, j, run;
162  RLTable *rl = &ff_rl_mpeg1;
163  uint8_t * const scantable = s->intra_scantable.permutated;
164  const uint16_t *quant_matrix = s->inter_matrix;
165  const int qscale = s->qscale;
166 
167  {
168  OPEN_READER(re, &s->gb);
169  i = -1;
170  // special case for first coefficient, no need to add second VLC table
171  UPDATE_CACHE(re, &s->gb);
172  if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
173  level = (3 * qscale * quant_matrix[0]) >> 5;
174  level = (level - 1) | 1;
175  if (GET_CACHE(re, &s->gb) & 0x40000000)
176  level = -level;
177  block[0] = level;
178  i++;
179  SKIP_BITS(re, &s->gb, 2);
180  if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
181  goto end;
182  }
183  /* now quantify & encode AC coefficients */
184  for (;;) {
185  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
186 
187  if (level != 0) {
188  i += run;
189  j = scantable[i];
190  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
191  level = (level - 1) | 1;
192  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
193  SKIP_BITS(re, &s->gb, 1);
194  } else {
195  /* escape */
196  run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
197  UPDATE_CACHE(re, &s->gb);
198  level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
199  if (level == -128) {
200  level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
201  } else if (level == 0) {
202  level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
203  }
204  i += run;
205  j = scantable[i];
206  if (level < 0) {
207  level = -level;
208  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
209  level = (level - 1) | 1;
210  level = -level;
211  } else {
212  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
213  level = (level - 1) | 1;
214  }
215  }
216  if (i > 63) {
217  av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
218  return -1;
219  }
220 
221  block[j] = level;
222  if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
223  break;
224  UPDATE_CACHE(re, &s->gb);
225  }
226 end:
227  LAST_SKIP_BITS(re, &s->gb, 2);
228  CLOSE_READER(re, &s->gb);
229  }
230  s->block_last_index[n] = i;
231  return 0;
232 }
233 
235 {
236  int level, i, j, run;
237  RLTable *rl = &ff_rl_mpeg1;
238  uint8_t * const scantable = s->intra_scantable.permutated;
239  const int qscale = s->qscale;
240 
241  {
242  OPEN_READER(re, &s->gb);
243  i = -1;
244  // special case for first coefficient, no need to add second VLC table
245  UPDATE_CACHE(re, &s->gb);
246  if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
247  level = (3 * qscale) >> 1;
248  level = (level - 1) | 1;
249  if (GET_CACHE(re, &s->gb) & 0x40000000)
250  level = -level;
251  block[0] = level;
252  i++;
253  SKIP_BITS(re, &s->gb, 2);
254  if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
255  goto end;
256  }
257 
258  /* now quantify & encode AC coefficients */
259  for (;;) {
260  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
261 
262  if (level != 0) {
263  i += run;
264  j = scantable[i];
265  level = ((level * 2 + 1) * qscale) >> 1;
266  level = (level - 1) | 1;
267  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
268  SKIP_BITS(re, &s->gb, 1);
269  } else {
270  /* escape */
271  run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
272  UPDATE_CACHE(re, &s->gb);
273  level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
274  if (level == -128) {
275  level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
276  } else if (level == 0) {
277  level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
278  }
279  i += run;
280  j = scantable[i];
281  if (level < 0) {
282  level = -level;
283  level = ((level * 2 + 1) * qscale) >> 1;
284  level = (level - 1) | 1;
285  level = -level;
286  } else {
287  level = ((level * 2 + 1) * qscale) >> 1;
288  level = (level - 1) | 1;
289  }
290  }
291 
292  block[j] = level;
293  if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
294  break;
295  UPDATE_CACHE(re, &s->gb);
296  }
297 end:
298  LAST_SKIP_BITS(re, &s->gb, 2);
299  CLOSE_READER(re, &s->gb);
300  }
301  s->block_last_index[n] = i;
302  return 0;
303 }
304 
305 
307 {
308  int level, i, j, run;
309  RLTable *rl = &ff_rl_mpeg1;
310  uint8_t * const scantable = s->intra_scantable.permutated;
311  const uint16_t *quant_matrix;
312  const int qscale = s->qscale;
313  int mismatch;
314 
315  mismatch = 1;
316 
317  {
318  OPEN_READER(re, &s->gb);
319  i = -1;
320  if (n < 4)
321  quant_matrix = s->inter_matrix;
322  else
323  quant_matrix = s->chroma_inter_matrix;
324 
325  // special case for first coefficient, no need to add second VLC table
326  UPDATE_CACHE(re, &s->gb);
327  if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
328  level= (3 * qscale * quant_matrix[0]) >> 5;
329  if (GET_CACHE(re, &s->gb) & 0x40000000)
330  level = -level;
331  block[0] = level;
332  mismatch ^= level;
333  i++;
334  SKIP_BITS(re, &s->gb, 2);
335  if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
336  goto end;
337  }
338 
339  /* now quantify & encode AC coefficients */
340  for (;;) {
341  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
342 
343  if (level != 0) {
344  i += run;
345  j = scantable[i];
346  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
347  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
348  SKIP_BITS(re, &s->gb, 1);
349  } else {
350  /* escape */
351  run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
352  UPDATE_CACHE(re, &s->gb);
353  level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
354 
355  i += run;
356  j = scantable[i];
357  if (level < 0) {
358  level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
359  level = -level;
360  } else {
361  level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
362  }
363  }
364  if (i > 63) {
365  av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
366  return -1;
367  }
368 
369  mismatch ^= level;
370  block[j] = level;
371  if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
372  break;
373  UPDATE_CACHE(re, &s->gb);
374  }
375 end:
376  LAST_SKIP_BITS(re, &s->gb, 2);
377  CLOSE_READER(re, &s->gb);
378  }
379  block[63] ^= (mismatch & 1);
380 
381  s->block_last_index[n] = i;
382  return 0;
383 }
384 
386  DCTELEM *block, int n)
387 {
388  int level, i, j, run;
389  RLTable *rl = &ff_rl_mpeg1;
390  uint8_t * const scantable = s->intra_scantable.permutated;
391  const int qscale = s->qscale;
392  OPEN_READER(re, &s->gb);
393  i = -1;
394 
395  // special case for first coefficient, no need to add second VLC table
396  UPDATE_CACHE(re, &s->gb);
397  if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
398  level = (3 * qscale) >> 1;
399  if (GET_CACHE(re, &s->gb) & 0x40000000)
400  level = -level;
401  block[0] = level;
402  i++;
403  SKIP_BITS(re, &s->gb, 2);
404  if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
405  goto end;
406  }
407 
408  /* now quantify & encode AC coefficients */
409  for (;;) {
410  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
411 
412  if (level != 0) {
413  i += run;
414  j = scantable[i];
415  level = ((level * 2 + 1) * qscale) >> 1;
416  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
417  SKIP_BITS(re, &s->gb, 1);
418  } else {
419  /* escape */
420  run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
421  UPDATE_CACHE(re, &s->gb);
422  level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
423 
424  i += run;
425  j = scantable[i];
426  if (level < 0) {
427  level = ((-level * 2 + 1) * qscale) >> 1;
428  level = -level;
429  } else {
430  level = ((level * 2 + 1) * qscale) >> 1;
431  }
432  }
433 
434  block[j] = level;
435  if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
436  break;
437  UPDATE_CACHE(re, &s->gb);
438  }
439 end:
440  LAST_SKIP_BITS(re, &s->gb, 2);
441  CLOSE_READER(re, &s->gb);
442  s->block_last_index[n] = i;
443  return 0;
444 }
445 
446 
447 static inline int mpeg2_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n)
448 {
449  int level, dc, diff, i, j, run;
450  int component;
451  RLTable *rl;
452  uint8_t * const scantable = s->intra_scantable.permutated;
453  const uint16_t *quant_matrix;
454  const int qscale = s->qscale;
455  int mismatch;
456 
457  /* DC coefficient */
458  if (n < 4) {
459  quant_matrix = s->intra_matrix;
460  component = 0;
461  } else {
462  quant_matrix = s->chroma_intra_matrix;
463  component = (n & 1) + 1;
464  }
465  diff = decode_dc(&s->gb, component);
466  if (diff >= 0xffff)
467  return -1;
468  dc = s->last_dc[component];
469  dc += diff;
470  s->last_dc[component] = dc;
471  block[0] = dc << (3 - s->intra_dc_precision);
472  av_dlog(s->avctx, "dc=%d\n", block[0]);
473  mismatch = block[0] ^ 1;
474  i = 0;
475  if (s->intra_vlc_format)
476  rl = &ff_rl_mpeg2;
477  else
478  rl = &ff_rl_mpeg1;
479 
480  {
481  OPEN_READER(re, &s->gb);
482  /* now quantify & encode AC coefficients */
483  for (;;) {
484  UPDATE_CACHE(re, &s->gb);
485  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
486 
487  if (level == 127) {
488  break;
489  } else if (level != 0) {
490  i += run;
491  j = scantable[i];
492  level = (level * qscale * quant_matrix[j]) >> 4;
493  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
494  LAST_SKIP_BITS(re, &s->gb, 1);
495  } else {
496  /* escape */
497  run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
498  UPDATE_CACHE(re, &s->gb);
499  level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
500  i += run;
501  j = scantable[i];
502  if (level < 0) {
503  level = (-level * qscale * quant_matrix[j]) >> 4;
504  level = -level;
505  } else {
506  level = (level * qscale * quant_matrix[j]) >> 4;
507  }
508  }
509  if (i > 63) {
510  av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
511  return -1;
512  }
513 
514  mismatch ^= level;
515  block[j] = level;
516  }
517  CLOSE_READER(re, &s->gb);
518  }
519  block[63] ^= mismatch & 1;
520 
521  s->block_last_index[n] = i;
522  return 0;
523 }
524 
526 {
527  int level, dc, diff, j, run;
528  int component;
529  RLTable *rl;
530  uint8_t * scantable = s->intra_scantable.permutated;
531  const uint16_t *quant_matrix;
532  const int qscale = s->qscale;
533 
534  /* DC coefficient */
535  if (n < 4) {
536  quant_matrix = s->intra_matrix;
537  component = 0;
538  } else {
539  quant_matrix = s->chroma_intra_matrix;
540  component = (n & 1) + 1;
541  }
542  diff = decode_dc(&s->gb, component);
543  if (diff >= 0xffff)
544  return -1;
545  dc = s->last_dc[component];
546  dc += diff;
547  s->last_dc[component] = dc;
548  block[0] = dc << (3 - s->intra_dc_precision);
549  if (s->intra_vlc_format)
550  rl = &ff_rl_mpeg2;
551  else
552  rl = &ff_rl_mpeg1;
553 
554  {
555  OPEN_READER(re, &s->gb);
556  /* now quantify & encode AC coefficients */
557  for (;;) {
558  UPDATE_CACHE(re, &s->gb);
559  GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
560 
561  if (level == 127) {
562  break;
563  } else if (level != 0) {
564  scantable += run;
565  j = *scantable;
566  level = (level * qscale * quant_matrix[j]) >> 4;
567  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
568  LAST_SKIP_BITS(re, &s->gb, 1);
569  } else {
570  /* escape */
571  run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
572  UPDATE_CACHE(re, &s->gb);
573  level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
574  scantable += run;
575  j = *scantable;
576  if (level < 0) {
577  level = (-level * qscale * quant_matrix[j]) >> 4;
578  level = -level;
579  } else {
580  level = (level * qscale * quant_matrix[j]) >> 4;
581  }
582  }
583 
584  block[j] = level;
585  }
586  CLOSE_READER(re, &s->gb);
587  }
588 
589  s->block_last_index[n] = scantable - s->intra_scantable.permutated;
590  return 0;
591 }
592 
594 
595 #define INIT_2D_VLC_RL(rl, static_size)\
596 {\
597  static RL_VLC_ELEM rl_vlc_table[static_size];\
598  INIT_VLC_STATIC(&rl.vlc, TEX_VLC_BITS, rl.n + 2,\
599  &rl.table_vlc[0][1], 4, 2,\
600  &rl.table_vlc[0][0], 4, 2, static_size);\
601 \
602  rl.rl_vlc[0] = rl_vlc_table;\
603  init_2d_vlc_rl(&rl);\
604 }
605 
606 static void init_2d_vlc_rl(RLTable *rl)
607 {
608  int i;
609 
610  for (i = 0; i < rl->vlc.table_size; i++) {
611  int code = rl->vlc.table[i][0];
612  int len = rl->vlc.table[i][1];
613  int level, run;
614 
615  if (len == 0) { // illegal code
616  run = 65;
617  level = MAX_LEVEL;
618  } else if (len<0) { //more bits needed
619  run = 0;
620  level = code;
621  } else {
622  if (code == rl->n) { //esc
623  run = 65;
624  level = 0;
625  } else if (code == rl->n+1) { //eob
626  run = 0;
627  level = 127;
628  } else {
629  run = rl->table_run [code] + 1;
630  level = rl->table_level[code];
631  }
632  }
633  rl->rl_vlc[0][i].len = len;
634  rl->rl_vlc[0][i].level = level;
635  rl->rl_vlc[0][i].run = run;
636  }
637 }
638 
640 {
641 
642  s->y_dc_scale_table =
644 
645 }
646 
648 {
649  s->last_dc[0] = 1 << (7 + s->intra_dc_precision);
650  s->last_dc[1] = s->last_dc[0];
651  s->last_dc[2] = s->last_dc[0];
652  memset(s->last_mv, 0, sizeof(s->last_mv));
653 }
654 
655 
656 /******************************************/
657 /* decoding */
658 
661 
666 
668 {
669  static int done = 0;
670 
671  if (!done) {
672  done = 1;
673 
674  INIT_VLC_STATIC(&ff_dc_lum_vlc, DC_VLC_BITS, 12,
676  ff_mpeg12_vlc_dc_lum_code, 2, 2, 512);
677  INIT_VLC_STATIC(&ff_dc_chroma_vlc, DC_VLC_BITS, 12,
679  ff_mpeg12_vlc_dc_chroma_code, 2, 2, 514);
680  INIT_VLC_STATIC(&mv_vlc, MV_VLC_BITS, 17,
681  &ff_mpeg12_mbMotionVectorTable[0][1], 2, 1,
682  &ff_mpeg12_mbMotionVectorTable[0][0], 2, 1, 518);
683  INIT_VLC_STATIC(&mbincr_vlc, MBINCR_VLC_BITS, 36,
684  &ff_mpeg12_mbAddrIncrTable[0][1], 2, 1,
685  &ff_mpeg12_mbAddrIncrTable[0][0], 2, 1, 538);
686  INIT_VLC_STATIC(&mb_pat_vlc, MB_PAT_VLC_BITS, 64,
687  &ff_mpeg12_mbPatTable[0][1], 2, 1,
688  &ff_mpeg12_mbPatTable[0][0], 2, 1, 512);
689 
690  INIT_VLC_STATIC(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7,
691  &table_mb_ptype[0][1], 2, 1,
692  &table_mb_ptype[0][0], 2, 1, 64);
693  INIT_VLC_STATIC(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11,
694  &table_mb_btype[0][1], 2, 1,
695  &table_mb_btype[0][0], 2, 1, 64);
698 
701  }
702 }
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 non_linear_qscale[qscale];
717  } else {
718  return qscale << 1;
719  }
720 }
721 
723 {
724  DCTELEM (*tmp)[64];
725 
726  tmp = s->pblocks[4];
727  s->pblocks[4] = s->pblocks[5];
728  s->pblocks[5] = tmp;
729 }
730 
731 /* motion type (for MPEG-2) */
732 #define MT_FIELD 1
733 #define MT_FRAME 2
734 #define MT_16X8 2
735 #define MT_DMV 3
736 
738 {
739  int i, j, k, cbp, val, mb_type, motion_type;
740  const int mb_block_count = 4 + (1 << s->chroma_format);
741 
742  av_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
743 
744  assert(s->mb_skipped == 0);
745 
746  if (s->mb_skip_run-- != 0) {
747  if (s->pict_type == AV_PICTURE_TYPE_P) {
748  s->mb_skipped = 1;
750  } else {
751  int mb_type;
752 
753  if (s->mb_x)
754  mb_type = s->current_picture.f.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
755  else
756  mb_type = s->current_picture.f.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1]; // FIXME not sure if this is allowed in MPEG at all
757  if (IS_INTRA(mb_type))
758  return -1;
759  s->current_picture.f.mb_type[s->mb_x + s->mb_y*s->mb_stride] =
760  mb_type | MB_TYPE_SKIP;
761 // assert(s->current_picture.f.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1] & (MB_TYPE_16x16 | MB_TYPE_16x8));
762 
763  if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
764  s->mb_skipped = 1;
765  }
766 
767  return 0;
768  }
769 
770  switch (s->pict_type) {
771  default:
772  case AV_PICTURE_TYPE_I:
773  if (get_bits1(&s->gb) == 0) {
774  if (get_bits1(&s->gb) == 0) {
775  av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
776  return -1;
777  }
778  mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
779  } else {
780  mb_type = MB_TYPE_INTRA;
781  }
782  break;
783  case AV_PICTURE_TYPE_P:
784  mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
785  if (mb_type < 0) {
786  av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
787  return -1;
788  }
789  mb_type = ptype2mb_type[mb_type];
790  break;
791  case AV_PICTURE_TYPE_B:
792  mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
793  if (mb_type < 0) {
794  av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
795  return -1;
796  }
797  mb_type = btype2mb_type[mb_type];
798  break;
799  }
800  av_dlog(s->avctx, "mb_type=%x\n", mb_type);
801 // motion_type = 0; /* avoid warning */
802  if (IS_INTRA(mb_type)) {
803  s->dsp.clear_blocks(s->block[0]);
804 
805  if (!s->chroma_y_shift) {
806  s->dsp.clear_blocks(s->block[6]);
807  }
808 
809  /* compute DCT type */
810  if (s->picture_structure == PICT_FRAME && // FIXME add an interlaced_dct coded var?
811  !s->frame_pred_frame_dct) {
812  s->interlaced_dct = get_bits1(&s->gb);
813  }
814 
815  if (IS_QUANT(mb_type))
816  s->qscale = get_qscale(s);
817 
819  /* just parse them */
820  if (s->picture_structure != PICT_FRAME)
821  skip_bits1(&s->gb); /* field select */
822 
823  s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
824  mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
825  s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
826  mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
827 
828  skip_bits1(&s->gb); /* marker */
829  } else
830  memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
831  s->mb_intra = 1;
832  // if 1, we memcpy blocks in xvmcvideo
834  ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
835  if (s->swap_uv) {
836  exchange_uv(s);
837  }
838  }
839 
840  if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
841  if (s->flags2 & CODEC_FLAG2_FAST) {
842  for (i = 0; i < 6; i++) {
844  }
845  } else {
846  for (i = 0; i < mb_block_count; i++) {
847  if (mpeg2_decode_block_intra(s, *s->pblocks[i], i) < 0)
848  return -1;
849  }
850  }
851  } else {
852  for (i = 0; i < 6; i++) {
853  if (mpeg1_decode_block_intra(s, *s->pblocks[i], i) < 0)
854  return -1;
855  }
856  }
857  } else {
858  if (mb_type & MB_TYPE_ZERO_MV) {
859  assert(mb_type & MB_TYPE_CBP);
860 
861  s->mv_dir = MV_DIR_FORWARD;
862  if (s->picture_structure == PICT_FRAME) {
863  if (!s->frame_pred_frame_dct)
864  s->interlaced_dct = get_bits1(&s->gb);
865  s->mv_type = MV_TYPE_16X16;
866  } else {
867  s->mv_type = MV_TYPE_FIELD;
868  mb_type |= MB_TYPE_INTERLACED;
869  s->field_select[0][0] = s->picture_structure - 1;
870  }
871 
872  if (IS_QUANT(mb_type))
873  s->qscale = get_qscale(s);
874 
875  s->last_mv[0][0][0] = 0;
876  s->last_mv[0][0][1] = 0;
877  s->last_mv[0][1][0] = 0;
878  s->last_mv[0][1][1] = 0;
879  s->mv[0][0][0] = 0;
880  s->mv[0][0][1] = 0;
881  } else {
882  assert(mb_type & MB_TYPE_L0L1);
883  // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
884  /* get additional motion vector type */
885  if (s->frame_pred_frame_dct)
886  motion_type = MT_FRAME;
887  else {
888  motion_type = get_bits(&s->gb, 2);
889  if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
890  s->interlaced_dct = get_bits1(&s->gb);
891  }
892 
893  if (IS_QUANT(mb_type))
894  s->qscale = get_qscale(s);
895 
896  /* motion vectors */
897  s->mv_dir = (mb_type >> 13) & 3;
898  av_dlog(s->avctx, "motion_type=%d\n", motion_type);
899  switch (motion_type) {
900  case MT_FRAME: /* or MT_16X8 */
901  if (s->picture_structure == PICT_FRAME) {
902  mb_type |= MB_TYPE_16x16;
903  s->mv_type = MV_TYPE_16X16;
904  for (i = 0; i < 2; i++) {
905  if (USES_LIST(mb_type, i)) {
906  /* MT_FRAME */
907  s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
908  mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
909  s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
910  mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
911  /* full_pel: only for MPEG-1 */
912  if (s->full_pel[i]) {
913  s->mv[i][0][0] <<= 1;
914  s->mv[i][0][1] <<= 1;
915  }
916  }
917  }
918  } else {
919  mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
920  s->mv_type = MV_TYPE_16X8;
921  for (i = 0; i < 2; i++) {
922  if (USES_LIST(mb_type, i)) {
923  /* MT_16X8 */
924  for (j = 0; j < 2; j++) {
925  s->field_select[i][j] = get_bits1(&s->gb);
926  for (k = 0; k < 2; k++) {
927  val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
928  s->last_mv[i][j][k]);
929  s->last_mv[i][j][k] = val;
930  s->mv[i][j][k] = val;
931  }
932  }
933  }
934  }
935  }
936  break;
937  case MT_FIELD:
938  s->mv_type = MV_TYPE_FIELD;
939  if (s->picture_structure == PICT_FRAME) {
940  mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
941  for (i = 0; i < 2; i++) {
942  if (USES_LIST(mb_type, i)) {
943  for (j = 0; j < 2; j++) {
944  s->field_select[i][j] = get_bits1(&s->gb);
945  val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
946  s->last_mv[i][j][0]);
947  s->last_mv[i][j][0] = val;
948  s->mv[i][j][0] = val;
949  av_dlog(s->avctx, "fmx=%d\n", val);
950  val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
951  s->last_mv[i][j][1] >> 1);
952  s->last_mv[i][j][1] = val << 1;
953  s->mv[i][j][1] = val;
954  av_dlog(s->avctx, "fmy=%d\n", val);
955  }
956  }
957  }
958  } else {
959  mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
960  for (i = 0; i < 2; i++) {
961  if (USES_LIST(mb_type, i)) {
962  s->field_select[i][0] = get_bits1(&s->gb);
963  for (k = 0; k < 2; k++) {
964  val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
965  s->last_mv[i][0][k]);
966  s->last_mv[i][0][k] = val;
967  s->last_mv[i][1][k] = val;
968  s->mv[i][0][k] = val;
969  }
970  }
971  }
972  }
973  break;
974  case MT_DMV:
975  s->mv_type = MV_TYPE_DMV;
976  for (i = 0; i < 2; i++) {
977  if (USES_LIST(mb_type, i)) {
978  int dmx, dmy, mx, my, m;
979  const int my_shift = s->picture_structure == PICT_FRAME;
980 
981  mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
982  s->last_mv[i][0][0]);
983  s->last_mv[i][0][0] = mx;
984  s->last_mv[i][1][0] = mx;
985  dmx = get_dmv(s);
986  my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
987  s->last_mv[i][0][1] >> my_shift);
988  dmy = get_dmv(s);
989 
990 
991  s->last_mv[i][0][1] = my << my_shift;
992  s->last_mv[i][1][1] = my << my_shift;
993 
994  s->mv[i][0][0] = mx;
995  s->mv[i][0][1] = my;
996  s->mv[i][1][0] = mx; // not used
997  s->mv[i][1][1] = my; // not used
998 
999  if (s->picture_structure == PICT_FRAME) {
1000  mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1001 
1002  // m = 1 + 2 * s->top_field_first;
1003  m = s->top_field_first ? 1 : 3;
1004 
1005  /* top -> top pred */
1006  s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1007  s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
1008  m = 4 - m;
1009  s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1010  s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
1011  } else {
1012  mb_type |= MB_TYPE_16x16;
1013 
1014  s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
1015  s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
1017  s->mv[i][2][1]--;
1018  else
1019  s->mv[i][2][1]++;
1020  }
1021  }
1022  }
1023  break;
1024  default:
1025  av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
1026  return -1;
1027  }
1028  }
1029 
1030  s->mb_intra = 0;
1031  if (HAS_CBP(mb_type)) {
1032  s->dsp.clear_blocks(s->block[0]);
1033 
1034  cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
1035  if (mb_block_count > 6) {
1036  cbp <<= mb_block_count - 6;
1037  cbp |= get_bits(&s->gb, mb_block_count - 6);
1038  s->dsp.clear_blocks(s->block[6]);
1039  }
1040  if (cbp <= 0) {
1041  av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
1042  return -1;
1043  }
1044 
1045  //if 1, we memcpy blocks in xvmcvideo
1047  ff_xvmc_pack_pblocks(s, cbp);
1048  if (s->swap_uv) {
1049  exchange_uv(s);
1050  }
1051  }
1052 
1053  if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
1054  if (s->flags2 & CODEC_FLAG2_FAST) {
1055  for (i = 0; i < 6; i++) {
1056  if (cbp & 32) {
1058  } else {
1059  s->block_last_index[i] = -1;
1060  }
1061  cbp += cbp;
1062  }
1063  } else {
1064  cbp <<= 12-mb_block_count;
1065 
1066  for (i = 0; i < mb_block_count; i++) {
1067  if (cbp & (1 << 11)) {
1068  if (mpeg2_decode_block_non_intra(s, *s->pblocks[i], i) < 0)
1069  return -1;
1070  } else {
1071  s->block_last_index[i] = -1;
1072  }
1073  cbp += cbp;
1074  }
1075  }
1076  } else {
1077  if (s->flags2 & CODEC_FLAG2_FAST) {
1078  for (i = 0; i < 6; i++) {
1079  if (cbp & 32) {
1080  mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1081  } else {
1082  s->block_last_index[i] = -1;
1083  }
1084  cbp += cbp;
1085  }
1086  } else {
1087  for (i = 0; i < 6; i++) {
1088  if (cbp & 32) {
1089  if (mpeg1_decode_block_inter(s, *s->pblocks[i], i) < 0)
1090  return -1;
1091  } else {
1092  s->block_last_index[i] = -1;
1093  }
1094  cbp += cbp;
1095  }
1096  }
1097  }
1098  } else {
1099  for (i = 0; i < 12; i++)
1100  s->block_last_index[i] = -1;
1101  }
1102  }
1103 
1104  s->current_picture.f.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1105 
1106  return 0;
1107 }
1108 
1110 {
1111  Mpeg1Context *s = avctx->priv_data;
1113  int i;
1114 
1115  /* we need some permutation to store matrices,
1116  * until MPV_common_init() sets the real permutation. */
1117  for (i = 0; i < 64; i++)
1118  s2->dsp.idct_permutation[i]=i;
1119 
1120  MPV_decode_defaults(s2);
1121 
1122  s->mpeg_enc_ctx.avctx = avctx;
1123  s->mpeg_enc_ctx.flags = avctx->flags;
1124  s->mpeg_enc_ctx.flags2 = avctx->flags2;
1127 
1128  s->mpeg_enc_ctx_allocated = 0;
1130  s->repeat_field = 0;
1131  s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1132  avctx->color_range = AVCOL_RANGE_MPEG;
1133  if (avctx->codec->id == CODEC_ID_MPEG1VIDEO)
1135  else
1137  return 0;
1138 }
1139 
1141 {
1142  Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1143  MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1144  int err;
1145 
1146  if (avctx == avctx_from || !ctx_from->mpeg_enc_ctx_allocated || !s1->context_initialized)
1147  return 0;
1148 
1149  err = ff_mpeg_update_thread_context(avctx, avctx_from);
1150  if (err) return err;
1151 
1152  if (!ctx->mpeg_enc_ctx_allocated)
1153  memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1154 
1155  if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1156  s->picture_number++;
1157 
1158  return 0;
1159 }
1160 
1161 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1162  const uint8_t *new_perm)
1163 {
1164  uint16_t temp_matrix[64];
1165  int i;
1166 
1167  memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1168 
1169  for (i = 0; i < 64; i++) {
1170  matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1171  }
1172 }
1173 
1174 static const enum PixelFormat pixfmt_xvmc_mpg2_420[] = {
1177  PIX_FMT_NONE };
1178 
1180 {
1181  Mpeg1Context *s1 = avctx->priv_data;
1182  MpegEncContext *s = &s1->mpeg_enc_ctx;
1183 
1184  if (avctx->xvmc_acceleration)
1185  return avctx->get_format(avctx, pixfmt_xvmc_mpg2_420);
1186  else if (avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU) {
1187  if (avctx->codec_id == CODEC_ID_MPEG1VIDEO)
1188  return PIX_FMT_VDPAU_MPEG1;
1189  else
1190  return PIX_FMT_VDPAU_MPEG2;
1191  } else {
1192  if (s->chroma_format < 2)
1193  return avctx->get_format(avctx, ff_hwaccel_pixfmt_list_420);
1194  else if (s->chroma_format == 2)
1195  return PIX_FMT_YUV422P;
1196  else
1197  return PIX_FMT_YUV444P;
1198  }
1199 }
1200 
1201 /* Call this function when we know all parameters.
1202  * It may be called in different places for MPEG-1 and MPEG-2. */
1204 {
1205  Mpeg1Context *s1 = avctx->priv_data;
1206  MpegEncContext *s = &s1->mpeg_enc_ctx;
1207  uint8_t old_permutation[64];
1208 
1209  if ((s1->mpeg_enc_ctx_allocated == 0) ||
1210  avctx->coded_width != s->width ||
1211  avctx->coded_height != s->height ||
1212  s1->save_width != s->width ||
1213  s1->save_height != s->height ||
1214  s1->save_aspect_info != s->aspect_ratio_info ||
1216  0)
1217  {
1218 
1219  if (s1->mpeg_enc_ctx_allocated) {
1220  ParseContext pc = s->parse_context;
1221  s->parse_context.buffer = 0;
1222  MPV_common_end(s);
1223  s->parse_context = pc;
1224  }
1225 
1226  if ((s->width == 0) || (s->height == 0))
1227  return -2;
1228 
1229  avcodec_set_dimensions(avctx, s->width, s->height);
1230  avctx->bit_rate = s->bit_rate;
1232  s1->save_width = s->width;
1233  s1->save_height = s->height;
1235 
1236  /* low_delay may be forced, in this case we will have B-frames
1237  * that behave like P-frames. */
1238  avctx->has_b_frames = !s->low_delay;
1239 
1240  assert((avctx->sub_id == 1) == (avctx->codec_id == CODEC_ID_MPEG1VIDEO));
1241  if (avctx->codec_id == CODEC_ID_MPEG1VIDEO) {
1242  //MPEG-1 fps
1245  //MPEG-1 aspect
1247  avctx->ticks_per_frame=1;
1248  } else {//MPEG-2
1249  //MPEG-2 fps
1251  &s->avctx->time_base.num,
1254  1 << 30);
1255  avctx->ticks_per_frame = 2;
1256  //MPEG-2 aspect
1257  if (s->aspect_ratio_info > 1) {
1258  AVRational dar =
1260  (AVRational) {s1->pan_scan.width, s1->pan_scan.height}),
1261  (AVRational) {s->width, s->height});
1262 
1263  // we ignore the spec here and guess a bit as reality does not match the spec, see for example
1264  // res_change_ffmpeg_aspect.ts and sequence-display-aspect.mpg
1265  // issue1613, 621, 562
1266  if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1267  (av_cmp_q(dar, (AVRational) {4, 3}) && av_cmp_q(dar, (AVRational) {16, 9}))) {
1270  (AVRational) {s->width, s->height});
1271  } else {
1274  (AVRational) {s1->pan_scan.width, s1->pan_scan.height});
1275 //issue1613 4/3 16/9 -> 16/9
1276 //res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1277 //widescreen-issue562.mpg 4/3 16/9 -> 16/9
1278 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1279 //av_log(NULL, AV_LOG_ERROR, "A %d/%d\n", ff_mpeg2_aspect[s->aspect_ratio_info].num, ff_mpeg2_aspect[s->aspect_ratio_info].den);
1280 //av_log(NULL, AV_LOG_ERROR, "B %d/%d\n", s->avctx->sample_aspect_ratio.num, s->avctx->sample_aspect_ratio.den);
1281  }
1282  } else {
1283  s->avctx->sample_aspect_ratio =
1284  ff_mpeg2_aspect[s->aspect_ratio_info];
1285  }
1286  } // MPEG-2
1287 
1288  avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1289  avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);
1290  // until then pix_fmt may be changed right after codec init
1291  if (avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT ||
1292  avctx->hwaccel ||
1293  s->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)
1294  if (avctx->idct_algo == FF_IDCT_AUTO)
1295  avctx->idct_algo = FF_IDCT_SIMPLE;
1296 
1297  /* Quantization matrices may need reordering
1298  * if DCT permutation is changed. */
1299  memcpy(old_permutation, s->dsp.idct_permutation, 64 * sizeof(uint8_t));
1300 
1301  if (MPV_common_init(s) < 0)
1302  return -2;
1303 
1304  quant_matrix_rebuild(s->intra_matrix, old_permutation, s->dsp.idct_permutation);
1305  quant_matrix_rebuild(s->inter_matrix, old_permutation, s->dsp.idct_permutation);
1306  quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->dsp.idct_permutation);
1307  quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->dsp.idct_permutation);
1308 
1309  s1->mpeg_enc_ctx_allocated = 1;
1310  }
1311  return 0;
1312 }
1313 
1315  const uint8_t *buf, int buf_size)
1316 {
1317  Mpeg1Context *s1 = avctx->priv_data;
1318  MpegEncContext *s = &s1->mpeg_enc_ctx;
1319  int ref, f_code, vbv_delay;
1320 
1321  init_get_bits(&s->gb, buf, buf_size*8);
1322 
1323  ref = get_bits(&s->gb, 10); /* temporal ref */
1324  s->pict_type = get_bits(&s->gb, 3);
1325  if (s->pict_type == 0 || s->pict_type > 3)
1326  return -1;
1327 
1328  vbv_delay = get_bits(&s->gb, 16);
1330  s->full_pel[0] = get_bits1(&s->gb);
1331  f_code = get_bits(&s->gb, 3);
1332  if (f_code == 0 && (avctx->err_recognition & AV_EF_BITSTREAM))
1333  return -1;
1334  s->mpeg_f_code[0][0] = f_code;
1335  s->mpeg_f_code[0][1] = f_code;
1336  }
1337  if (s->pict_type == AV_PICTURE_TYPE_B) {
1338  s->full_pel[1] = get_bits1(&s->gb);
1339  f_code = get_bits(&s->gb, 3);
1340  if (f_code == 0 && (avctx->err_recognition & AV_EF_BITSTREAM))
1341  return -1;
1342  s->mpeg_f_code[1][0] = f_code;
1343  s->mpeg_f_code[1][1] = f_code;
1344  }
1347 
1348  if (avctx->debug & FF_DEBUG_PICT_INFO)
1349  av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1350 
1351  s->y_dc_scale = 8;
1352  s->c_dc_scale = 8;
1353  return 0;
1354 }
1355 
1357 {
1358  MpegEncContext *s= &s1->mpeg_enc_ctx;
1359  int horiz_size_ext, vert_size_ext;
1360  int bit_rate_ext;
1361 
1362  skip_bits(&s->gb, 1); /* profile and level esc*/
1363  s->avctx->profile = get_bits(&s->gb, 3);
1364  s->avctx->level = get_bits(&s->gb, 4);
1365  s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1366  s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1367  horiz_size_ext = get_bits(&s->gb, 2);
1368  vert_size_ext = get_bits(&s->gb, 2);
1369  s->width |= (horiz_size_ext << 12);
1370  s->height |= (vert_size_ext << 12);
1371  bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1372  s->bit_rate += (bit_rate_ext << 18) * 400;
1373  skip_bits1(&s->gb); /* marker */
1374  s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1375 
1376  s->low_delay = get_bits1(&s->gb);
1377  if (s->flags & CODEC_FLAG_LOW_DELAY)
1378  s->low_delay = 1;
1379 
1380  s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1381  s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1382 
1383  av_dlog(s->avctx, "sequence extension\n");
1385  s->avctx->sub_id = 2; /* indicates MPEG-2 found */
1386 
1387  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1388  av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n",
1389  s->avctx->profile, s->avctx->level, s->avctx->rc_buffer_size, s->bit_rate);
1390 
1391 }
1392 
1394 {
1395  MpegEncContext *s = &s1->mpeg_enc_ctx;
1396  int color_description, w, h;
1397 
1398  skip_bits(&s->gb, 3); /* video format */
1399  color_description = get_bits1(&s->gb);
1400  if (color_description) {
1401  s->avctx->color_primaries = get_bits(&s->gb, 8);
1402  s->avctx->color_trc = get_bits(&s->gb, 8);
1403  s->avctx->colorspace = get_bits(&s->gb, 8);
1404  }
1405  w = get_bits(&s->gb, 14);
1406  skip_bits(&s->gb, 1); //marker
1407  h = get_bits(&s->gb, 14);
1408  // remaining 3 bits are zero padding
1409 
1410  s1->pan_scan.width = 16 * w;
1411  s1->pan_scan.height = 16 * h;
1412 
1413  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1414  av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1415 }
1416 
1418 {
1419  MpegEncContext *s = &s1->mpeg_enc_ctx;
1420  int i, nofco;
1421 
1422  nofco = 1;
1423  if (s->progressive_sequence) {
1424  if (s->repeat_first_field) {
1425  nofco++;
1426  if (s->top_field_first)
1427  nofco++;
1428  }
1429  } else {
1430  if (s->picture_structure == PICT_FRAME) {
1431  nofco++;
1432  if (s->repeat_first_field)
1433  nofco++;
1434  }
1435  }
1436  for (i = 0; i < nofco; i++) {
1437  s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1438  skip_bits(&s->gb, 1); // marker
1439  s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1440  skip_bits(&s->gb, 1); // marker
1441  }
1442 
1443  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1444  av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
1445  s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1446  s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1447  s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1448 }
1449 
1450 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra)
1451 {
1452  int i;
1453 
1454  for (i = 0; i < 64; i++) {
1455  int j = s->dsp.idct_permutation[ff_zigzag_direct[i]];
1456  int v = get_bits(&s->gb, 8);
1457  if (v == 0) {
1458  av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1459  return -1;
1460  }
1461  if (intra && i == 0 && v != 8) {
1462  av_log(s->avctx, AV_LOG_ERROR, "intra matrix invalid, ignoring\n");
1463  v = 8; // needed by pink.mpg / issue1046
1464  }
1465  matrix0[j] = v;
1466  if (matrix1)
1467  matrix1[j] = v;
1468  }
1469  return 0;
1470 }
1471 
1473 {
1474  av_dlog(s->avctx, "matrix extension\n");
1475 
1476  if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1477  if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1478  if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, NULL , 1);
1479  if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, NULL , 0);
1480 }
1481 
1483 {
1484  MpegEncContext *s = &s1->mpeg_enc_ctx;
1485 
1486  s->full_pel[0] = s->full_pel[1] = 0;
1487  s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1488  s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1489  s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1490  s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1491  if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1492  av_log(s->avctx, AV_LOG_ERROR, "Missing picture start code, guessing missing values\n");
1493  if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1494  if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1496  else
1498  } else
1502  }
1503  s->intra_dc_precision = get_bits(&s->gb, 2);
1504  s->picture_structure = get_bits(&s->gb, 2);
1505  s->top_field_first = get_bits1(&s->gb);
1506  s->frame_pred_frame_dct = get_bits1(&s->gb);
1508  s->q_scale_type = get_bits1(&s->gb);
1509  s->intra_vlc_format = get_bits1(&s->gb);
1510  s->alternate_scan = get_bits1(&s->gb);
1511  s->repeat_first_field = get_bits1(&s->gb);
1512  s->chroma_420_type = get_bits1(&s->gb);
1513  s->progressive_frame = get_bits1(&s->gb);
1514 
1515  if (s->progressive_sequence && !s->progressive_frame) {
1516  s->progressive_frame = 1;
1517  av_log(s->avctx, AV_LOG_ERROR, "interlaced frame in progressive sequence, ignoring\n");
1518  }
1519 
1520  if (s->picture_structure == 0 || (s->progressive_frame && s->picture_structure != PICT_FRAME)) {
1521  av_log(s->avctx, AV_LOG_ERROR, "picture_structure %d invalid, ignoring\n", s->picture_structure);
1523  }
1524 
1526  av_log(s->avctx, AV_LOG_ERROR, "invalid frame_pred_frame_dct\n");
1527  s->frame_pred_frame_dct = 1;
1528  }
1529 
1530  if (s->picture_structure == PICT_FRAME) {
1531  s->first_field = 0;
1532  s->v_edge_pos = 16 * s->mb_height;
1533  } else {
1534  s->first_field ^= 1;
1535  s->v_edge_pos = 8 * s->mb_height;
1536  memset(s->mbskip_table, 0, s->mb_stride * s->mb_height);
1537  }
1538 
1539  if (s->alternate_scan) {
1542  } else {
1545  }
1546 
1547  /* composite display not parsed */
1548  av_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1549  av_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1550  av_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1551  av_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1552  av_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1553  av_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1554  av_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1555  av_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1556  av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1557 }
1558 
1559 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1560 {
1561  AVCodecContext *avctx = s->avctx;
1562  Mpeg1Context *s1 = (Mpeg1Context*)s;
1563 
1564  /* start frame decoding */
1565  if (s->first_field || s->picture_structure == PICT_FRAME) {
1566  if (MPV_frame_start(s, avctx) < 0)
1567  return -1;
1568 
1569  ff_er_frame_start(s);
1570 
1571  /* first check if we must repeat the frame */
1573  if (s->repeat_first_field) {
1574  if (s->progressive_sequence) {
1575  if (s->top_field_first)
1577  else
1579  } else if (s->progressive_frame) {
1581  }
1582  }
1583 
1585 
1587  ff_thread_finish_setup(avctx);
1588  } else { // second field
1589  int i;
1590 
1591  if (!s->current_picture_ptr) {
1592  av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1593  return -1;
1594  }
1595 
1596  for (i = 0; i < 4; i++) {
1600  }
1601  }
1602  }
1603 
1604  if (avctx->hwaccel) {
1605  if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)
1606  return -1;
1607  }
1608 
1609 // MPV_frame_start will call this function too,
1610 // but we need to call it on every field
1612  if (ff_xvmc_field_start(s, avctx) < 0)
1613  return -1;
1614 
1615  return 0;
1616 }
1617 
1618 #define DECODE_SLICE_ERROR -1
1619 #define DECODE_SLICE_OK 0
1620 
1627 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1628  const uint8_t **buf, int buf_size)
1629 {
1630  AVCodecContext *avctx = s->avctx;
1631  const int lowres = s->avctx->lowres;
1632  const int field_pic = s->picture_structure != PICT_FRAME;
1633 
1634  s->resync_mb_x =
1635  s->resync_mb_y = -1;
1636 
1637  assert(mb_y < s->mb_height);
1638 
1639  init_get_bits(&s->gb, *buf, buf_size * 8);
1640 
1642  s->interlaced_dct = 0;
1643 
1644  s->qscale = get_qscale(s);
1645 
1646  if (s->qscale == 0) {
1647  av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1648  return -1;
1649  }
1650 
1651  /* extra slice info */
1652  while (get_bits1(&s->gb) != 0) {
1653  skip_bits(&s->gb, 8);
1654  }
1655 
1656  s->mb_x = 0;
1657 
1658  if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1659  skip_bits1(&s->gb);
1660  } else {
1661  while (get_bits_left(&s->gb) > 0) {
1662  int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
1663  if (code < 0) {
1664  av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1665  return -1;
1666  }
1667  if (code >= 33) {
1668  if (code == 33) {
1669  s->mb_x += 33;
1670  }
1671  /* otherwise, stuffing, nothing to do */
1672  } else {
1673  s->mb_x += code;
1674  break;
1675  }
1676  }
1677  }
1678 
1679  if (s->mb_x >= (unsigned)s->mb_width) {
1680  av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1681  return -1;
1682  }
1683 
1684  if (avctx->hwaccel) {
1685  const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1686  int start_code = -1;
1687  buf_end = avpriv_mpv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1688  if (buf_end < *buf + buf_size)
1689  buf_end -= 4;
1690  s->mb_y = mb_y;
1691  if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1692  return DECODE_SLICE_ERROR;
1693  *buf = buf_end;
1694  return DECODE_SLICE_OK;
1695  }
1696 
1697  s->resync_mb_x = s->mb_x;
1698  s->resync_mb_y = s->mb_y = mb_y;
1699  s->mb_skip_run = 0;
1701 
1702  if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1703  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1704  av_log(s->avctx, AV_LOG_DEBUG, "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",
1705  s->qscale, s->mpeg_f_code[0][0], s->mpeg_f_code[0][1], s->mpeg_f_code[1][0], s->mpeg_f_code[1][1],
1706  s->pict_type == AV_PICTURE_TYPE_I ? "I" : (s->pict_type == AV_PICTURE_TYPE_P ? "P" : (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")),
1707  s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
1710  }
1711  }
1712 
1713  for (;;) {
1714  // If 1, we memcpy blocks in xvmcvideo.
1716  ff_xvmc_init_block(s); // set s->block
1717 
1718  if (mpeg_decode_mb(s, s->block) < 0)
1719  return -1;
1720 
1721  if (s->current_picture.f.motion_val[0] && !s->encoding) { // note motion_val is normally NULL unless we want to extract the MVs
1722  const int wrap = s->b8_stride;
1723  int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1724  int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1725  int motion_x, motion_y, dir, i;
1726 
1727  for (i = 0; i < 2; i++) {
1728  for (dir = 0; dir < 2; dir++) {
1729  if (s->mb_intra || (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1730  motion_x = motion_y = 0;
1731  } else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1732  motion_x = s->mv[dir][0][0];
1733  motion_y = s->mv[dir][0][1];
1734  } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
1735  motion_x = s->mv[dir][i][0];
1736  motion_y = s->mv[dir][i][1];
1737  }
1738 
1739  s->current_picture.f.motion_val[dir][xy ][0] = motion_x;
1740  s->current_picture.f.motion_val[dir][xy ][1] = motion_y;
1741  s->current_picture.f.motion_val[dir][xy + 1][0] = motion_x;
1742  s->current_picture.f.motion_val[dir][xy + 1][1] = motion_y;
1743  s->current_picture.f.ref_index [dir][b8_xy ] =
1744  s->current_picture.f.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1745  assert(s->field_select[dir][i] == 0 || s->field_select[dir][i] == 1);
1746  }
1747  xy += wrap;
1748  b8_xy +=2;
1749  }
1750  }
1751 
1752  s->dest[0] += 16 >> lowres;
1753  s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1754  s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1755 
1756  MPV_decode_mb(s, s->block);
1757 
1758  if (++s->mb_x >= s->mb_width) {
1759  const int mb_size = 16 >> s->avctx->lowres;
1760 
1761  ff_draw_horiz_band(s, mb_size*(s->mb_y >> field_pic), mb_size);
1763 
1764  s->mb_x = 0;
1765  s->mb_y += 1 << field_pic;
1766 
1767  if (s->mb_y >= s->mb_height) {
1768  int left = get_bits_left(&s->gb);
1769  int is_d10 = s->chroma_format == 2 && s->pict_type == AV_PICTURE_TYPE_I && avctx->profile == 0 && avctx->level == 5
1770  && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0
1771  && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/;
1772 
1773  if (left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10)
1774  || ((avctx->err_recognition & AV_EF_BUFFER) && left > 8)) {
1775  av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23)));
1776  return -1;
1777  } else
1778  goto eos;
1779  }
1780 
1782  }
1783 
1784  /* skip mb handling */
1785  if (s->mb_skip_run == -1) {
1786  /* read increment again */
1787  s->mb_skip_run = 0;
1788  for (;;) {
1789  int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
1790  if (code < 0) {
1791  av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1792  return -1;
1793  }
1794  if (code >= 33) {
1795  if (code == 33) {
1796  s->mb_skip_run += 33;
1797  } else if (code == 35) {
1798  if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1799  av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1800  return -1;
1801  }
1802  goto eos; /* end of slice */
1803  }
1804  /* otherwise, stuffing, nothing to do */
1805  } else {
1806  s->mb_skip_run += code;
1807  break;
1808  }
1809  }
1810  if (s->mb_skip_run) {
1811  int i;
1812  if (s->pict_type == AV_PICTURE_TYPE_I) {
1813  av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1814  return -1;
1815  }
1816 
1817  /* skip mb */
1818  s->mb_intra = 0;
1819  for (i = 0; i < 12; i++)
1820  s->block_last_index[i] = -1;
1821  if (s->picture_structure == PICT_FRAME)
1822  s->mv_type = MV_TYPE_16X16;
1823  else
1824  s->mv_type = MV_TYPE_FIELD;
1825  if (s->pict_type == AV_PICTURE_TYPE_P) {
1826  /* if P type, zero motion vector is implied */
1827  s->mv_dir = MV_DIR_FORWARD;
1828  s->mv[0][0][0] = s->mv[0][0][1] = 0;
1829  s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1830  s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1831  s->field_select[0][0] = (s->picture_structure - 1) & 1;
1832  } else {
1833  /* if B type, reuse previous vectors and directions */
1834  s->mv[0][0][0] = s->last_mv[0][0][0];
1835  s->mv[0][0][1] = s->last_mv[0][0][1];
1836  s->mv[1][0][0] = s->last_mv[1][0][0];
1837  s->mv[1][0][1] = s->last_mv[1][0][1];
1838  }
1839  }
1840  }
1841  }
1842 eos: // end of slice
1843  *buf += (get_bits_count(&s->gb)-1)/8;
1844 //printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
1845  return 0;
1846 }
1847 
1848 static int slice_decode_thread(AVCodecContext *c, void *arg)
1849 {
1850  MpegEncContext *s = *(void**)arg;
1851  const uint8_t *buf = s->gb.buffer;
1852  int mb_y = s->start_mb_y;
1853  const int field_pic = s->picture_structure != PICT_FRAME;
1854 
1855  s->error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1856 
1857  for (;;) {
1858  uint32_t start_code;
1859  int ret;
1860 
1861  ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
1862  emms_c();
1863 //av_log(c, AV_LOG_DEBUG, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1864 //ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, s->start_mb_y, s->end_mb_y, s->error_count);
1865  if (ret < 0) {
1866  if (c->err_recognition & AV_EF_EXPLODE)
1867  return ret;
1868  if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
1870  } else {
1872  }
1873 
1874  if (s->mb_y == s->end_mb_y)
1875  return 0;
1876 
1877  start_code = -1;
1878  buf = avpriv_mpv_find_start_code(buf, s->gb.buffer_end, &start_code);
1879  mb_y= (start_code - SLICE_MIN_START_CODE) << field_pic;
1881  mb_y++;
1882  if (mb_y < 0 || mb_y >= s->end_mb_y)
1883  return -1;
1884  }
1885 }
1886 
1891 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
1892 {
1893  Mpeg1Context *s1 = avctx->priv_data;
1894  MpegEncContext *s = &s1->mpeg_enc_ctx;
1895 
1897  return 0;
1898 
1899  if (s->avctx->hwaccel) {
1900  if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1901  av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1902  }
1903 
1905  ff_xvmc_field_end(s);
1906 
1907  /* end of slice reached */
1908  if (/*s->mb_y << field_pic == s->mb_height &&*/ !s->first_field) {
1909  /* end of image */
1910 
1912 
1913  ff_er_frame_end(s);
1914 
1915  MPV_frame_end(s);
1916 
1917  if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1918  *pict = *(AVFrame*)s->current_picture_ptr;
1919  ff_print_debug_info(s, pict);
1920  } else {
1921  if (avctx->active_thread_type & FF_THREAD_FRAME)
1922  s->picture_number++;
1923  /* latency of 1 frame for I- and P-frames */
1924  /* XXX: use another variable than picture_number */
1925  if (s->last_picture_ptr != NULL) {
1926  *pict = *(AVFrame*)s->last_picture_ptr;
1927  ff_print_debug_info(s, pict);
1928  }
1929  }
1930 
1931  return 1;
1932  } else {
1933  return 0;
1934  }
1935 }
1936 
1938  const uint8_t *buf, int buf_size)
1939 {
1940  Mpeg1Context *s1 = avctx->priv_data;
1941  MpegEncContext *s = &s1->mpeg_enc_ctx;
1942  int width, height;
1943  int i, v, j;
1944 
1945  init_get_bits(&s->gb, buf, buf_size*8);
1946 
1947  width = get_bits(&s->gb, 12);
1948  height = get_bits(&s->gb, 12);
1949  if (width <= 0 || height <= 0)
1950  return -1;
1951  s->aspect_ratio_info = get_bits(&s->gb, 4);
1952  if (s->aspect_ratio_info == 0) {
1953  av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
1954  if (avctx->err_recognition & AV_EF_BITSTREAM)
1955  return -1;
1956  }
1957  s->frame_rate_index = get_bits(&s->gb, 4);
1958  if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
1959  return -1;
1960  s->bit_rate = get_bits(&s->gb, 18) * 400;
1961  if (get_bits1(&s->gb) == 0) /* marker */
1962  return -1;
1963  s->width = width;
1964  s->height = height;
1965 
1966  s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
1967  skip_bits(&s->gb, 1);
1968 
1969  /* get matrix */
1970  if (get_bits1(&s->gb)) {
1972  } else {
1973  for (i = 0; i < 64; i++) {
1974  j = s->dsp.idct_permutation[i];
1976  s->intra_matrix[j] = v;
1977  s->chroma_intra_matrix[j] = v;
1978  }
1979  }
1980  if (get_bits1(&s->gb)) {
1982  } else {
1983  for (i = 0; i < 64; i++) {
1984  int j = s->dsp.idct_permutation[i];
1986  s->inter_matrix[j] = v;
1987  s->chroma_inter_matrix[j] = v;
1988  }
1989  }
1990 
1991  if (show_bits(&s->gb, 23) != 0) {
1992  av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
1993  return -1;
1994  }
1995 
1996  /* we set MPEG-2 parameters so that it emulates MPEG-1 */
1997  s->progressive_sequence = 1;
1998  s->progressive_frame = 1;
2000  s->frame_pred_frame_dct = 1;
2001  s->chroma_format = 1;
2003  avctx->sub_id = 1; /* indicates MPEG-1 */
2004  s->out_format = FMT_MPEG1;
2005  s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2006  if (s->flags & CODEC_FLAG_LOW_DELAY)
2007  s->low_delay = 1;
2008 
2009  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2010  av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2011  s->avctx->rc_buffer_size, s->bit_rate);
2012 
2013  return 0;
2014 }
2015 
2017 {
2018  Mpeg1Context *s1 = avctx->priv_data;
2019  MpegEncContext *s = &s1->mpeg_enc_ctx;
2020  int i, v;
2021 
2022  /* start new MPEG-1 context decoding */
2023  s->out_format = FMT_MPEG1;
2024  if (s1->mpeg_enc_ctx_allocated) {
2025  MPV_common_end(s);
2026  }
2027  s->width = avctx->coded_width;
2028  s->height = avctx->coded_height;
2029  avctx->has_b_frames = 0; // true?
2030  s->low_delay = 1;
2031 
2032  avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2033  avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);
2034 
2035  if (avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT || avctx->hwaccel ||
2037  if (avctx->idct_algo == FF_IDCT_AUTO)
2038  avctx->idct_algo = FF_IDCT_SIMPLE;
2039 
2040  if (MPV_common_init(s) < 0)
2041  return -1;
2042  exchange_uv(s); // common init reset pblocks, so we swap them here
2043  s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2044  s1->mpeg_enc_ctx_allocated = 1;
2045 
2046  for (i = 0; i < 64; i++) {
2047  int j = s->dsp.idct_permutation[i];
2049  s->intra_matrix[j] = v;
2050  s->chroma_intra_matrix[j] = v;
2051 
2053  s->inter_matrix[j] = v;
2054  s->chroma_inter_matrix[j] = v;
2055  }
2056 
2057  s->progressive_sequence = 1;
2058  s->progressive_frame = 1;
2060  s->frame_pred_frame_dct = 1;
2061  s->chroma_format = 1;
2063  avctx->sub_id = 2; /* indicates MPEG-2 */
2064  s1->save_width = s->width;
2065  s1->save_height = s->height;
2067  return 0;
2068 }
2069 
2070 
2072  const uint8_t *p, int buf_size)
2073 {
2074  const uint8_t *buf_end = p + buf_size;
2075 
2076  /* we parse the DTG active format information */
2077  if (buf_end - p >= 5 &&
2078  p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2079  int flags = p[4];
2080  p += 5;
2081  if (flags & 0x80) {
2082  /* skip event id */
2083  p += 2;
2084  }
2085  if (flags & 0x40) {
2086  if (buf_end - p < 1)
2087  return;
2088  avctx->dtg_active_format = p[0] & 0x0f;
2089  }
2090  }
2091 }
2092 
2093 static void mpeg_decode_gop(AVCodecContext *avctx,
2094  const uint8_t *buf, int buf_size)
2095 {
2096  Mpeg1Context *s1 = avctx->priv_data;
2097  MpegEncContext *s = &s1->mpeg_enc_ctx;
2098 
2099  int time_code_hours, time_code_minutes;
2100  int time_code_seconds, time_code_pictures;
2101  int broken_link;
2102 
2103  init_get_bits(&s->gb, buf, buf_size*8);
2104 
2105  skip_bits1(&s->gb); /* drop_frame_flag */
2106 
2107  time_code_hours = get_bits(&s->gb, 5);
2108  time_code_minutes = get_bits(&s->gb, 6);
2109  skip_bits1(&s->gb); // marker bit
2110  time_code_seconds = get_bits(&s->gb, 6);
2111  time_code_pictures = get_bits(&s->gb, 6);
2112 
2113  s1->closed_gop = get_bits1(&s->gb);
2114  /*broken_link indicate that after editing the
2115  reference frames of the first B-Frames after GOP I-Frame
2116  are missing (open gop)*/
2117  broken_link = get_bits1(&s->gb);
2118 
2119  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2120  av_log(s->avctx, AV_LOG_DEBUG, "GOP (%2d:%02d:%02d.[%02d]) closed_gop=%d broken_link=%d\n",
2121  time_code_hours, time_code_minutes, time_code_seconds,
2122  time_code_pictures, s1->closed_gop, broken_link);
2123 }
2128 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s)
2129 {
2130  int i;
2131  uint32_t state = pc->state;
2132 
2133  /* EOF considered as end of frame */
2134  if (buf_size == 0)
2135  return 0;
2136 
2137 /*
2138  0 frame start -> 1/4
2139  1 first_SEQEXT -> 0/2
2140  2 first field start -> 3/0
2141  3 second_SEQEXT -> 2/0
2142  4 searching end
2143 */
2144 
2145  for (i = 0; i < buf_size; i++) {
2146  assert(pc->frame_start_found >= 0 && pc->frame_start_found <= 4);
2147  if (pc->frame_start_found & 1) {
2148  if (state == EXT_START_CODE && (buf[i] & 0xF0) != 0x80)
2149  pc->frame_start_found--;
2150  else if (state == EXT_START_CODE + 2) {
2151  if ((buf[i] & 3) == 3)
2152  pc->frame_start_found = 0;
2153  else
2154  pc->frame_start_found = (pc->frame_start_found + 1) & 3;
2155  }
2156  state++;
2157  } else {
2158  i = avpriv_mpv_find_start_code(buf + i, buf + buf_size, &state) - buf - 1;
2159  if (pc->frame_start_found == 0 && state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE) {
2160  i++;
2161  pc->frame_start_found = 4;
2162  }
2163  if (state == SEQ_END_CODE) {
2164  pc->state=-1;
2165  return i+1;
2166  }
2167  if (pc->frame_start_found == 2 && state == SEQ_START_CODE)
2168  pc->frame_start_found = 0;
2169  if (pc->frame_start_found < 4 && state == EXT_START_CODE)
2170  pc->frame_start_found++;
2171  if (pc->frame_start_found == 4 && (state & 0xFFFFFF00) == 0x100) {
2172  if (state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE) {
2173  pc->frame_start_found = 0;
2174  pc->state = -1;
2175  return i - 3;
2176  }
2177  }
2178  if (pc->frame_start_found == 0 && s && state == PICTURE_START_CODE) {
2179  ff_fetch_timestamp(s, i - 3, 1);
2180  }
2181  }
2182  }
2183  pc->state = state;
2184  return END_NOT_FOUND;
2185 }
2186 
2187 static int decode_chunks(AVCodecContext *avctx,
2188  AVFrame *picture, int *data_size,
2189  const uint8_t *buf, int buf_size);
2190 
2191 /* handle buffering and image synchronisation */
2193  void *data, int *data_size,
2194  AVPacket *avpkt)
2195 {
2196  const uint8_t *buf = avpkt->data;
2197  int buf_size = avpkt->size;
2198  Mpeg1Context *s = avctx->priv_data;
2199  AVFrame *picture = data;
2201  av_dlog(avctx, "fill_buffer\n");
2202 
2203  if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2204  /* special case for last picture */
2205  if (s2->low_delay == 0 && s2->next_picture_ptr) {
2206  *picture = *(AVFrame*)s2->next_picture_ptr;
2207  s2->next_picture_ptr = NULL;
2208 
2209  *data_size = sizeof(AVFrame);
2210  }
2211  return buf_size;
2212  }
2213 
2214  if (s2->flags & CODEC_FLAG_TRUNCATED) {
2215  int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL);
2216 
2217  if (ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0)
2218  return buf_size;
2219  }
2220 
2221  if (s->mpeg_enc_ctx_allocated == 0 && avctx->codec_tag == AV_RL32("VCR2"))
2222  vcr2_init_sequence(avctx);
2223 
2224  s->slice_count = 0;
2225 
2226  if (avctx->extradata && !avctx->frame_number) {
2227  int ret = decode_chunks(avctx, picture, data_size, avctx->extradata, avctx->extradata_size);
2228  if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE))
2229  return ret;
2230  }
2231 
2232  return decode_chunks(avctx, picture, data_size, buf, buf_size);
2233 }
2234 
2235 static int decode_chunks(AVCodecContext *avctx,
2236  AVFrame *picture, int *data_size,
2237  const uint8_t *buf, int buf_size)
2238 {
2239  Mpeg1Context *s = avctx->priv_data;
2241  const uint8_t *buf_ptr = buf;
2242  const uint8_t *buf_end = buf + buf_size;
2243  int ret, input_size;
2244  int last_code = 0;
2245 
2246  for (;;) {
2247  /* find next start code */
2248  uint32_t start_code = -1;
2249  buf_ptr = avpriv_mpv_find_start_code(buf_ptr, buf_end, &start_code);
2250  if (start_code > 0x1ff) {
2251  if (s2->pict_type != AV_PICTURE_TYPE_B || avctx->skip_frame <= AVDISCARD_DEFAULT) {
2252  if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE)) {
2253  int i;
2254 
2255  avctx->execute(avctx, slice_decode_thread, &s2->thread_context[0], NULL, s->slice_count, sizeof(void*));
2256  for (i = 0; i < s->slice_count; i++)
2257  s2->error_count += s2->thread_context[i]->error_count;
2258  }
2259 
2261  ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
2262 
2263  if (slice_end(avctx, picture)) {
2264  if (s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
2265  *data_size = sizeof(AVPicture);
2266  }
2267  }
2268  s2->pict_type = 0;
2269  return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2270  }
2271 
2272  input_size = buf_end - buf_ptr;
2273 
2274  if (avctx->debug & FF_DEBUG_STARTCODE) {
2275  av_log(avctx, AV_LOG_DEBUG, "%3X at %td left %d\n", start_code, buf_ptr-buf, input_size);
2276  }
2277 
2278  /* prepare data for next start code */
2279  switch (start_code) {
2280  case SEQ_START_CODE:
2281  if (last_code == 0) {
2282  mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2283  s->sync=1;
2284  } else {
2285  av_log(avctx, AV_LOG_ERROR, "ignoring SEQ_START_CODE after %X\n", last_code);
2286  if (avctx->err_recognition & AV_EF_EXPLODE)
2287  return AVERROR_INVALIDDATA;
2288  }
2289  break;
2290 
2291  case PICTURE_START_CODE:
2292  if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) && s->slice_count) {
2293  int i;
2294 
2295  avctx->execute(avctx, slice_decode_thread,
2296  s2->thread_context, NULL,
2297  s->slice_count, sizeof(void*));
2298  for (i = 0; i < s->slice_count; i++)
2299  s2->error_count += s2->thread_context[i]->error_count;
2300  s->slice_count = 0;
2301  }
2302  if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2303  ret = mpeg_decode_postinit(avctx);
2304  if (ret < 0) {
2305  av_log(avctx, AV_LOG_ERROR, "mpeg_decode_postinit() failure\n");
2306  return ret;
2307  }
2308 
2309  /* we have a complete image: we try to decompress it */
2310  if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2311  s2->pict_type = 0;
2312  s2->first_slice = 1;
2313  last_code = PICTURE_START_CODE;
2314  } else {
2315  av_log(avctx, AV_LOG_ERROR, "ignoring pic after %X\n", last_code);
2316  if (avctx->err_recognition & AV_EF_EXPLODE)
2317  return AVERROR_INVALIDDATA;
2318  }
2319  break;
2320  case EXT_START_CODE:
2321  init_get_bits(&s2->gb, buf_ptr, input_size*8);
2322 
2323  switch (get_bits(&s2->gb, 4)) {
2324  case 0x1:
2325  if (last_code == 0) {
2327  } else {
2328  av_log(avctx, AV_LOG_ERROR, "ignoring seq ext after %X\n", last_code);
2329  if (avctx->err_recognition & AV_EF_EXPLODE)
2330  return AVERROR_INVALIDDATA;
2331  }
2332  break;
2333  case 0x2:
2335  break;
2336  case 0x3:
2338  break;
2339  case 0x7:
2341  break;
2342  case 0x8:
2343  if (last_code == PICTURE_START_CODE) {
2345  } else {
2346  av_log(avctx, AV_LOG_ERROR, "ignoring pic cod ext after %X\n", last_code);
2347  if (avctx->err_recognition & AV_EF_EXPLODE)
2348  return AVERROR_INVALIDDATA;
2349  }
2350  break;
2351  }
2352  break;
2353  case USER_START_CODE:
2354  mpeg_decode_user_data(avctx, buf_ptr, input_size);
2355  break;
2356  case GOP_START_CODE:
2357  if (last_code == 0) {
2358  s2->first_field=0;
2359  mpeg_decode_gop(avctx, buf_ptr, input_size);
2360  s->sync=1;
2361  } else {
2362  av_log(avctx, AV_LOG_ERROR, "ignoring GOP_START_CODE after %X\n", last_code);
2363  if (avctx->err_recognition & AV_EF_EXPLODE)
2364  return AVERROR_INVALIDDATA;
2365  }
2366  break;
2367  default:
2368  if (start_code >= SLICE_MIN_START_CODE &&
2369  start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2370  const int field_pic = s2->picture_structure != PICT_FRAME;
2371  int mb_y = (start_code - SLICE_MIN_START_CODE) << field_pic;
2372  last_code = SLICE_MIN_START_CODE;
2373 
2375  mb_y++;
2376 
2377  if (mb_y >= s2->mb_height) {
2378  av_log(s2->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2379  return -1;
2380  }
2381 
2382  if (s2->last_picture_ptr == NULL) {
2383  /* Skip B-frames if we do not have reference frames and gop is not closed */
2384  if (s2->pict_type == AV_PICTURE_TYPE_B) {
2385  if (!s->closed_gop)
2386  break;
2387  }
2388  }
2389  if (s2->pict_type == AV_PICTURE_TYPE_I)
2390  s->sync=1;
2391  if (s2->next_picture_ptr == NULL) {
2392  /* Skip P-frames if we do not have a reference frame or we have an invalid header. */
2393  if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) break;
2394  }
2395  if ((avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type == AV_PICTURE_TYPE_B) ||
2396  (avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type != AV_PICTURE_TYPE_I) ||
2397  avctx->skip_frame >= AVDISCARD_ALL)
2398  break;
2399 
2400  if (!s->mpeg_enc_ctx_allocated)
2401  break;
2402 
2403  if (s2->codec_id == CODEC_ID_MPEG2VIDEO) {
2404  if (mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom)
2405  break;
2406  }
2407 
2408  if (!s2->pict_type) {
2409  av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2410  if (avctx->err_recognition & AV_EF_EXPLODE)
2411  return AVERROR_INVALIDDATA;
2412  break;
2413  }
2414 
2415  if (s2->first_slice) {
2416  s2->first_slice = 0;
2417  if (mpeg_field_start(s2, buf, buf_size) < 0)
2418  return -1;
2419  }
2420  if (!s2->current_picture_ptr) {
2421  av_log(avctx, AV_LOG_ERROR, "current_picture not initialized\n");
2422  return AVERROR_INVALIDDATA;
2423  }
2424 
2425  if (avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU) {
2426  s->slice_count++;
2427  break;
2428  }
2429 
2430  if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE)) {
2431  int threshold = (s2->mb_height * s->slice_count +
2432  s2->slice_context_count / 2) /
2433  s2->slice_context_count;
2434  if (threshold <= mb_y) {
2435  MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2436 
2437  thread_context->start_mb_y = mb_y;
2438  thread_context->end_mb_y = s2->mb_height;
2439  if (s->slice_count) {
2440  s2->thread_context[s->slice_count-1]->end_mb_y = mb_y;
2441  ff_update_duplicate_context(thread_context, s2);
2442  }
2443  init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
2444  s->slice_count++;
2445  }
2446  buf_ptr += 2; // FIXME add minimum number of bytes per slice
2447  } else {
2448  ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2449  emms_c();
2450 
2451  if (ret < 0) {
2452  if (avctx->err_recognition & AV_EF_EXPLODE)
2453  return ret;
2454  if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2456  } else {
2458  }
2459  }
2460  }
2461  break;
2462  }
2463  }
2464 }
2465 
2466 static void flush(AVCodecContext *avctx)
2467 {
2468  Mpeg1Context *s = avctx->priv_data;
2469 
2470  s->sync=0;
2471  s->closed_gop = 0;
2472 
2473  ff_mpeg_flush(avctx);
2474 }
2475 
2477 {
2478  Mpeg1Context *s = avctx->priv_data;
2479 
2480  if (s->mpeg_enc_ctx_allocated)
2482  return 0;
2483 }
2484 
2486  { FF_PROFILE_MPEG2_422, "4:2:2" },
2487  { FF_PROFILE_MPEG2_HIGH, "High" },
2488  { FF_PROFILE_MPEG2_SS, "Spatially Scalable" },
2489  { FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" },
2490  { FF_PROFILE_MPEG2_MAIN, "Main" },
2491  { FF_PROFILE_MPEG2_SIMPLE, "Simple" },
2492  { FF_PROFILE_RESERVED, "Reserved" },
2493  { FF_PROFILE_RESERVED, "Reserved" },
2494  { FF_PROFILE_UNKNOWN },
2495 };
2496 
2497 
2499  .name = "mpeg1video",
2500  .type = AVMEDIA_TYPE_VIDEO,
2501  .id = CODEC_ID_MPEG1VIDEO,
2502  .priv_data_size = sizeof(Mpeg1Context),
2507  .flush = flush,
2508  .max_lowres = 3,
2509  .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2511 };
2512 
2514  .name = "mpeg2video",
2515  .type = AVMEDIA_TYPE_VIDEO,
2516  .id = CODEC_ID_MPEG2VIDEO,
2517  .priv_data_size = sizeof(Mpeg1Context),
2522  .flush = flush,
2523  .max_lowres = 3,
2524  .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2525  .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles),
2526 };
2527 
2528 #if CONFIG_MPEG_XVMC_DECODER
2529 static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx)
2530 {
2531  if (avctx->active_thread_type & FF_THREAD_SLICE)
2532  return -1;
2533  if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
2534  return -1;
2535  if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
2536  av_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2537  }
2538  mpeg_decode_init(avctx);
2539 
2541  avctx->xvmc_acceleration = 2; // 2 - the blocks are packed!
2542 
2543  return 0;
2544 }
2545 
2546 AVCodec ff_mpeg_xvmc_decoder = {
2547  .name = "mpegvideo_xvmc",
2548  .type = AVMEDIA_TYPE_VIDEO,
2550  .priv_data_size = sizeof(Mpeg1Context),
2551  .init = mpeg_mc_decode_init,
2555  .flush = flush,
2556  .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2557 };
2558 
2559 #endif
2560 
2561 #if CONFIG_MPEG_VDPAU_DECODER
2562 AVCodec ff_mpeg_vdpau_decoder = {
2563  .name = "mpegvideo_vdpau",
2564  .type = AVMEDIA_TYPE_VIDEO,
2565  .id = CODEC_ID_MPEG2VIDEO,
2566  .priv_data_size = sizeof(Mpeg1Context),
2571  .flush = flush,
2572  .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
2573 };
2574 #endif
2575 
2576 #if CONFIG_MPEG1_VDPAU_DECODER
2577 AVCodec ff_mpeg1_vdpau_decoder = {
2578  .name = "mpeg1video_vdpau",
2579  .type = AVMEDIA_TYPE_VIDEO,
2580  .id = CODEC_ID_MPEG1VIDEO,
2581  .priv_data_size = sizeof(Mpeg1Context),
2586  .flush = flush,
2587  .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),
2588 };
2589 #endif
2590