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h264_refs.c
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1 /*
2  * H.26L/H.264/AVC/JVT/14496-10/... reference picture handling
3  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * H.264 / AVC / MPEG4 part10 reference picture handling.
25  * @author Michael Niedermayer <michaelni@gmx.at>
26  */
27 
28 #include <inttypes.h>
29 
30 #include "libavutil/avassert.h"
31 #include "internal.h"
32 #include "avcodec.h"
33 #include "h264.h"
34 #include "golomb.h"
35 #include "mpegutils.h"
36 
37 #include <assert.h>
38 
39 static void pic_as_field(H264Ref *pic, const int parity)
40 {
41  int i;
42  for (i = 0; i < FF_ARRAY_ELEMS(pic->data); ++i) {
43  if (parity == PICT_BOTTOM_FIELD)
44  pic->data[i] += pic->linesize[i];
45  pic->reference = parity;
46  pic->linesize[i] *= 2;
47  }
48  pic->poc = pic->parent->field_poc[parity == PICT_BOTTOM_FIELD];
49 }
50 
52 {
53  memcpy(dst->data, src->f->data, sizeof(dst->data));
54  memcpy(dst->linesize, src->f->linesize, sizeof(dst->linesize));
55  dst->reference = src->reference;
56  dst->poc = src->poc;
57  dst->pic_id = src->pic_id;
58  dst->parent = src;
59 }
60 
61 static int split_field_copy(H264Ref *dest, H264Picture *src, int parity, int id_add)
62 {
63  int match = !!(src->reference & parity);
64 
65  if (match) {
66  ref_from_h264pic(dest, src);
67  if (parity != PICT_FRAME) {
68  pic_as_field(dest, parity);
69  dest->pic_id *= 2;
70  dest->pic_id += id_add;
71  }
72  }
73 
74  return match;
75 }
76 
77 static int build_def_list(H264Ref *def, int def_len,
78  H264Picture **in, int len, int is_long, int sel)
79 {
80  int i[2] = { 0 };
81  int index = 0;
82 
83  while (i[0] < len || i[1] < len) {
84  while (i[0] < len && !(in[i[0]] && (in[i[0]]->reference & sel)))
85  i[0]++;
86  while (i[1] < len && !(in[i[1]] && (in[i[1]]->reference & (sel ^ 3))))
87  i[1]++;
88  if (i[0] < len) {
89  av_assert0(index < def_len);
90  in[i[0]]->pic_id = is_long ? i[0] : in[i[0]]->frame_num;
91  split_field_copy(&def[index++], in[i[0]++], sel, 1);
92  }
93  if (i[1] < len) {
94  av_assert0(index < def_len);
95  in[i[1]]->pic_id = is_long ? i[1] : in[i[1]]->frame_num;
96  split_field_copy(&def[index++], in[i[1]++], sel ^ 3, 0);
97  }
98  }
99 
100  return index;
101 }
102 
103 static int add_sorted(H264Picture **sorted, H264Picture **src, int len, int limit, int dir)
104 {
105  int i, best_poc;
106  int out_i = 0;
107 
108  for (;;) {
109  best_poc = dir ? INT_MIN : INT_MAX;
110 
111  for (i = 0; i < len; i++) {
112  const int poc = src[i]->poc;
113  if (((poc > limit) ^ dir) && ((poc < best_poc) ^ dir)) {
114  best_poc = poc;
115  sorted[out_i] = src[i];
116  }
117  }
118  if (best_poc == (dir ? INT_MIN : INT_MAX))
119  break;
120  limit = sorted[out_i++]->poc - dir;
121  }
122  return out_i;
123 }
124 
126 {
127  AVFrame *f = pic->f;
128  return (h->cur_pic_ptr->f->width != f->width ||
129  h->cur_pic_ptr->f->height != f->height ||
130  h->cur_pic_ptr->f->format != f->format);
131 }
132 
134 {
135  int i, len;
136  int j;
137 
138  if (sl->slice_type_nos == AV_PICTURE_TYPE_B) {
139  H264Picture *sorted[32];
140  int cur_poc, list;
141  int lens[2];
142 
143  if (FIELD_PICTURE(h))
145  else
146  cur_poc = h->cur_pic_ptr->poc;
147 
148  for (list = 0; list < 2; list++) {
149  len = add_sorted(sorted, h->short_ref, h->short_ref_count, cur_poc, 1 ^ list);
150  len += add_sorted(sorted + len, h->short_ref, h->short_ref_count, cur_poc, 0 ^ list);
151  av_assert0(len <= 32);
152 
153  len = build_def_list(sl->ref_list[list], FF_ARRAY_ELEMS(sl->ref_list[0]),
154  sorted, len, 0, h->picture_structure);
155  len += build_def_list(sl->ref_list[list] + len,
156  FF_ARRAY_ELEMS(sl->ref_list[0]) - len,
157  h->long_ref, 16, 1, h->picture_structure);
158  av_assert0(len <= 32);
159 
160  if (len < sl->ref_count[list])
161  memset(&sl->ref_list[list][len], 0, sizeof(H264Ref) * (sl->ref_count[list] - len));
162  lens[list] = len;
163  }
164 
165  if (lens[0] == lens[1] && lens[1] > 1) {
166  for (i = 0; i < lens[0] &&
167  sl->ref_list[0][i].parent->f->buf[0]->buffer ==
168  sl->ref_list[1][i].parent->f->buf[0]->buffer; i++);
169  if (i == lens[0]) {
170  FFSWAP(H264Ref, sl->ref_list[1][0], sl->ref_list[1][1]);
171  }
172  }
173  } else {
174  len = build_def_list(sl->ref_list[0], FF_ARRAY_ELEMS(sl->ref_list[0]),
176  len += build_def_list(sl->ref_list[0] + len,
177  FF_ARRAY_ELEMS(sl->ref_list[0]) - len,
178  h-> long_ref, 16, 1, h->picture_structure);
179  av_assert0(len <= 32);
180 
181  if (len < sl->ref_count[0])
182  memset(&sl->ref_list[0][len], 0, sizeof(H264Ref) * (sl->ref_count[0] - len));
183  }
184 #ifdef TRACE
185  for (i = 0; i < sl->ref_count[0]; i++) {
186  ff_tlog(h->avctx, "List0: %s fn:%d 0x%p\n",
187  (sl->ref_list[0][i].parent ? (sl->ref_list[0][i].parent->long_ref ? "LT" : "ST") : "??"),
188  sl->ref_list[0][i].pic_id,
189  sl->ref_list[0][i].data[0]);
190  }
191  if (sl->slice_type_nos == AV_PICTURE_TYPE_B) {
192  for (i = 0; i < sl->ref_count[1]; i++) {
193  ff_tlog(h->avctx, "List1: %s fn:%d 0x%p\n",
194  (sl->ref_list[1][i].parent ? (sl->ref_list[1][i].parent->long_ref ? "LT" : "ST") : "??"),
195  sl->ref_list[1][i].pic_id,
196  sl->ref_list[1][i].data[0]);
197  }
198  }
199 #endif
200 
201  for (j = 0; j<1+(sl->slice_type_nos == AV_PICTURE_TYPE_B); j++) {
202  for (i = 0; i < sl->ref_count[j]; i++) {
203  if (sl->ref_list[j][i].parent) {
204  if (mismatches_ref(h, sl->ref_list[j][i].parent)) {
205  av_log(h->avctx, AV_LOG_ERROR, "Discarding mismatching reference\n");
206  memset(&sl->ref_list[j][i], 0, sizeof(sl->ref_list[j][i]));
207  }
208  }
209  }
210  }
211  for (i = 0; i < sl->list_count; i++)
212  h->default_ref[i] = sl->ref_list[i][0];
213 }
214 
215 static void print_short_term(H264Context *h);
216 static void print_long_term(H264Context *h);
217 
218 /**
219  * Extract structure information about the picture described by pic_num in
220  * the current decoding context (frame or field). Note that pic_num is
221  * picture number without wrapping (so, 0<=pic_num<max_pic_num).
222  * @param pic_num picture number for which to extract structure information
223  * @param structure one of PICT_XXX describing structure of picture
224  * with pic_num
225  * @return frame number (short term) or long term index of picture
226  * described by pic_num
227  */
228 static int pic_num_extract(H264Context *h, int pic_num, int *structure)
229 {
230  *structure = h->picture_structure;
231  if (FIELD_PICTURE(h)) {
232  if (!(pic_num & 1))
233  /* opposite field */
234  *structure ^= PICT_FRAME;
235  pic_num >>= 1;
236  }
237 
238  return pic_num;
239 }
240 
242 {
243  int list, index, pic_structure;
244 
245  print_short_term(h);
246  print_long_term(h);
247 
249 
250  for (list = 0; list < sl->list_count; list++) {
251  if (get_bits1(&sl->gb)) { // ref_pic_list_modification_flag_l[01]
252  int pred = h->curr_pic_num;
253 
254  for (index = 0; ; index++) {
255  unsigned int modification_of_pic_nums_idc = get_ue_golomb_31(&sl->gb);
256  unsigned int pic_id;
257  int i;
258  H264Picture *ref = NULL;
259 
260  if (modification_of_pic_nums_idc == 3)
261  break;
262 
263  if (index >= sl->ref_count[list]) {
264  av_log(h->avctx, AV_LOG_ERROR, "reference count overflow\n");
265  return -1;
266  }
267 
268  switch (modification_of_pic_nums_idc) {
269  case 0:
270  case 1: {
271  const unsigned int abs_diff_pic_num = get_ue_golomb_long(&sl->gb) + 1;
272  int frame_num;
273 
274  if (abs_diff_pic_num > h->max_pic_num) {
276  "abs_diff_pic_num overflow\n");
277  return AVERROR_INVALIDDATA;
278  }
279 
280  if (modification_of_pic_nums_idc == 0)
281  pred -= abs_diff_pic_num;
282  else
283  pred += abs_diff_pic_num;
284  pred &= h->max_pic_num - 1;
285 
286  frame_num = pic_num_extract(h, pred, &pic_structure);
287 
288  for (i = h->short_ref_count - 1; i >= 0; i--) {
289  ref = h->short_ref[i];
290  assert(ref->reference);
291  assert(!ref->long_ref);
292  if (ref->frame_num == frame_num &&
293  (ref->reference & pic_structure))
294  break;
295  }
296  if (i >= 0)
297  ref->pic_id = pred;
298  break;
299  }
300  case 2: {
301  int long_idx;
302  pic_id = get_ue_golomb(&sl->gb); // long_term_pic_idx
303 
304  long_idx = pic_num_extract(h, pic_id, &pic_structure);
305 
306  if (long_idx > 31U) {
308  "long_term_pic_idx overflow\n");
309  return AVERROR_INVALIDDATA;
310  }
311  ref = h->long_ref[long_idx];
312  assert(!(ref && !ref->reference));
313  if (ref && (ref->reference & pic_structure) && !mismatches_ref(h, ref)) {
314  ref->pic_id = pic_id;
315  assert(ref->long_ref);
316  i = 0;
317  } else {
318  i = -1;
319  }
320  break;
321  }
322  default:
324  "illegal modification_of_pic_nums_idc %u\n",
325  modification_of_pic_nums_idc);
326  return AVERROR_INVALIDDATA;
327  }
328 
329  if (i < 0) {
331  "reference picture missing during reorder\n");
332  memset(&sl->ref_list[list][index], 0, sizeof(sl->ref_list[0][0])); // FIXME
333  } else {
334  for (i = index; i + 1 < sl->ref_count[list]; i++) {
335  if (sl->ref_list[list][i].parent &&
336  ref->long_ref == sl->ref_list[list][i].parent->long_ref &&
337  ref->pic_id == sl->ref_list[list][i].pic_id)
338  break;
339  }
340  for (; i > index; i--) {
341  sl->ref_list[list][i] = sl->ref_list[list][i - 1];
342  }
343  ref_from_h264pic(&sl->ref_list[list][index], ref);
344  if (FIELD_PICTURE(h)) {
345  pic_as_field(&sl->ref_list[list][index], pic_structure);
346  }
347  }
348  }
349  }
350  }
351  for (list = 0; list < sl->list_count; list++) {
352  for (index = 0; index < sl->ref_count[list]; index++) {
353  if ( !sl->ref_list[list][index].parent
354  || (!FIELD_PICTURE(h) && (sl->ref_list[list][index].reference&3) != 3)) {
355  int i;
356  av_log(h->avctx, AV_LOG_ERROR, "Missing reference picture, default is %d\n", h->default_ref[list].poc);
357  for (i = 0; i < FF_ARRAY_ELEMS(h->last_pocs); i++)
358  h->last_pocs[i] = INT_MIN;
359  if (h->default_ref[list].parent
360  && !(!FIELD_PICTURE(h) && (h->default_ref[list].reference&3) != 3))
361  sl->ref_list[list][index] = h->default_ref[list];
362  else
363  return -1;
364  }
365  av_assert0(av_buffer_get_ref_count(sl->ref_list[list][index].parent->f->buf[0]) > 0);
366  }
367  }
368 
369  return 0;
370 }
371 
373 {
374  int list, i, j;
375  for (list = 0; list < sl->list_count; list++) {
376  for (i = 0; i < sl->ref_count[list]; i++) {
377  H264Ref *frame = &sl->ref_list[list][i];
378  H264Ref *field = &sl->ref_list[list][16 + 2 * i];
379 
380  field[0] = *frame;
381 
382  for (j = 0; j < 3; j++)
383  field[0].linesize[j] <<= 1;
384  field[0].reference = PICT_TOP_FIELD;
385  field[0].poc = field[0].parent->field_poc[0];
386 
387  field[1] = field[0];
388 
389  for (j = 0; j < 3; j++)
390  field[1].data[j] += frame->parent->f->linesize[j];
391  field[1].reference = PICT_BOTTOM_FIELD;
392  field[1].poc = field[1].parent->field_poc[1];
393 
394  sl->pwt.luma_weight[16 + 2 * i][list][0] = sl->pwt.luma_weight[16 + 2 * i + 1][list][0] = sl->pwt.luma_weight[i][list][0];
395  sl->pwt.luma_weight[16 + 2 * i][list][1] = sl->pwt.luma_weight[16 + 2 * i + 1][list][1] = sl->pwt.luma_weight[i][list][1];
396  for (j = 0; j < 2; j++) {
397  sl->pwt.chroma_weight[16 + 2 * i][list][j][0] = sl->pwt.chroma_weight[16 + 2 * i + 1][list][j][0] = sl->pwt.chroma_weight[i][list][j][0];
398  sl->pwt.chroma_weight[16 + 2 * i][list][j][1] = sl->pwt.chroma_weight[16 + 2 * i + 1][list][j][1] = sl->pwt.chroma_weight[i][list][j][1];
399  }
400  }
401  }
402 }
403 
404 /**
405  * Mark a picture as no longer needed for reference. The refmask
406  * argument allows unreferencing of individual fields or the whole frame.
407  * If the picture becomes entirely unreferenced, but is being held for
408  * display purposes, it is marked as such.
409  * @param refmask mask of fields to unreference; the mask is bitwise
410  * anded with the reference marking of pic
411  * @return non-zero if pic becomes entirely unreferenced (except possibly
412  * for display purposes) zero if one of the fields remains in
413  * reference
414  */
415 static inline int unreference_pic(H264Context *h, H264Picture *pic, int refmask)
416 {
417  int i;
418  if (pic->reference &= refmask) {
419  return 0;
420  } else {
421  for(i = 0; h->delayed_pic[i]; i++)
422  if(pic == h->delayed_pic[i]){
423  pic->reference = DELAYED_PIC_REF;
424  break;
425  }
426  return 1;
427  }
428 }
429 
430 /**
431  * Find a H264Picture in the short term reference list by frame number.
432  * @param frame_num frame number to search for
433  * @param idx the index into h->short_ref where returned picture is found
434  * undefined if no picture found.
435  * @return pointer to the found picture, or NULL if no pic with the provided
436  * frame number is found
437  */
438 static H264Picture *find_short(H264Context *h, int frame_num, int *idx)
439 {
440  int i;
441 
442  for (i = 0; i < h->short_ref_count; i++) {
443  H264Picture *pic = h->short_ref[i];
444  if (h->avctx->debug & FF_DEBUG_MMCO)
445  av_log(h->avctx, AV_LOG_DEBUG, "%d %d %p\n", i, pic->frame_num, pic);
446  if (pic->frame_num == frame_num) {
447  *idx = i;
448  return pic;
449  }
450  }
451  return NULL;
452 }
453 
454 /**
455  * Remove a picture from the short term reference list by its index in
456  * that list. This does no checking on the provided index; it is assumed
457  * to be valid. Other list entries are shifted down.
458  * @param i index into h->short_ref of picture to remove.
459  */
460 static void remove_short_at_index(H264Context *h, int i)
461 {
462  assert(i >= 0 && i < h->short_ref_count);
463  h->short_ref[i] = NULL;
464  if (--h->short_ref_count)
465  memmove(&h->short_ref[i], &h->short_ref[i + 1],
466  (h->short_ref_count - i) * sizeof(H264Picture*));
467 }
468 
469 /**
470  * @return the removed picture or NULL if an error occurs
471  */
472 static H264Picture *remove_short(H264Context *h, int frame_num, int ref_mask)
473 {
474  H264Picture *pic;
475  int i;
476 
477  if (h->avctx->debug & FF_DEBUG_MMCO)
478  av_log(h->avctx, AV_LOG_DEBUG, "remove short %d count %d\n", frame_num, h->short_ref_count);
479 
480  pic = find_short(h, frame_num, &i);
481  if (pic) {
482  if (unreference_pic(h, pic, ref_mask))
483  remove_short_at_index(h, i);
484  }
485 
486  return pic;
487 }
488 
489 /**
490  * Remove a picture from the long term reference list by its index in
491  * that list.
492  * @return the removed picture or NULL if an error occurs
493  */
494 static H264Picture *remove_long(H264Context *h, int i, int ref_mask)
495 {
496  H264Picture *pic;
497 
498  pic = h->long_ref[i];
499  if (pic) {
500  if (unreference_pic(h, pic, ref_mask)) {
501  assert(h->long_ref[i]->long_ref == 1);
502  h->long_ref[i]->long_ref = 0;
503  h->long_ref[i] = NULL;
504  h->long_ref_count--;
505  }
506  }
507 
508  return pic;
509 }
510 
512 {
513  int i;
514 
515  for (i = 0; i < 16; i++) {
516  remove_long(h, i, 0);
517  }
518  assert(h->long_ref_count == 0);
519 
520  if (h->short_ref_count && !h->last_pic_for_ec.f->data[0]) {
522  if (h->short_ref[0]->f->buf[0])
524  }
525 
526  for (i = 0; i < h->short_ref_count; i++) {
527  unreference_pic(h, h->short_ref[i], 0);
528  h->short_ref[i] = NULL;
529  }
530  h->short_ref_count = 0;
531 
532  memset(h->default_ref, 0, sizeof(h->default_ref));
533  for (i = 0; i < h->nb_slice_ctx; i++) {
534  H264SliceContext *sl = &h->slice_ctx[i];
535  sl->list_count = sl->ref_count[0] = sl->ref_count[1] = 0;
536  memset(sl->ref_list, 0, sizeof(sl->ref_list));
537  }
538 }
539 
540 /**
541  * print short term list
542  */
544 {
545  uint32_t i;
546  if (h->avctx->debug & FF_DEBUG_MMCO) {
547  av_log(h->avctx, AV_LOG_DEBUG, "short term list:\n");
548  for (i = 0; i < h->short_ref_count; i++) {
549  H264Picture *pic = h->short_ref[i];
550  av_log(h->avctx, AV_LOG_DEBUG, "%"PRIu32" fn:%d poc:%d %p\n",
551  i, pic->frame_num, pic->poc, pic->f->data[0]);
552  }
553  }
554 }
555 
556 /**
557  * print long term list
558  */
560 {
561  uint32_t i;
562  if (h->avctx->debug & FF_DEBUG_MMCO) {
563  av_log(h->avctx, AV_LOG_DEBUG, "long term list:\n");
564  for (i = 0; i < 16; i++) {
565  H264Picture *pic = h->long_ref[i];
566  if (pic) {
567  av_log(h->avctx, AV_LOG_DEBUG, "%"PRIu32" fn:%d poc:%d %p\n",
568  i, pic->frame_num, pic->poc, pic->f->data[0]);
569  }
570  }
571  }
572 }
573 
574 static int check_opcodes(MMCO *mmco1, MMCO *mmco2, int n_mmcos)
575 {
576  int i;
577 
578  for (i = 0; i < n_mmcos; i++) {
579  if (mmco1[i].opcode != mmco2[i].opcode) {
580  av_log(NULL, AV_LOG_ERROR, "MMCO opcode [%d, %d] at %d mismatches between slices\n",
581  mmco1[i].opcode, mmco2[i].opcode, i);
582  return -1;
583  }
584  }
585 
586  return 0;
587 }
588 
590 {
591  MMCO mmco_temp[MAX_MMCO_COUNT], *mmco = first_slice ? h->mmco : mmco_temp;
592  int mmco_index = 0, i = 0;
593 
594  if (h->short_ref_count &&
596  !(FIELD_PICTURE(h) && !h->first_field && h->cur_pic_ptr->reference)) {
597  mmco[0].opcode = MMCO_SHORT2UNUSED;
598  mmco[0].short_pic_num = h->short_ref[h->short_ref_count - 1]->frame_num;
599  mmco_index = 1;
600  if (FIELD_PICTURE(h)) {
601  mmco[0].short_pic_num *= 2;
602  mmco[1].opcode = MMCO_SHORT2UNUSED;
603  mmco[1].short_pic_num = mmco[0].short_pic_num + 1;
604  mmco_index = 2;
605  }
606  }
607 
608  if (first_slice) {
609  h->mmco_index = mmco_index;
610  } else if (!first_slice && mmco_index >= 0 &&
611  (mmco_index != h->mmco_index ||
612  (i = check_opcodes(h->mmco, mmco_temp, mmco_index)))) {
614  "Inconsistent MMCO state between slices [%d, %d]\n",
615  mmco_index, h->mmco_index);
616  return AVERROR_INVALIDDATA;
617  }
618  return 0;
619 }
620 
621 int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count)
622 {
623  int i, av_uninit(j);
624  int pps_count;
625  int pps_ref_count[2] = {0};
626  int current_ref_assigned = 0, err = 0;
627  H264Picture *av_uninit(pic);
628 
629  if ((h->avctx->debug & FF_DEBUG_MMCO) && mmco_count == 0)
630  av_log(h->avctx, AV_LOG_DEBUG, "no mmco here\n");
631 
632  for (i = 0; i < mmco_count; i++) {
633  int av_uninit(structure), av_uninit(frame_num);
634  if (h->avctx->debug & FF_DEBUG_MMCO)
635  av_log(h->avctx, AV_LOG_DEBUG, "mmco:%d %d %d\n", h->mmco[i].opcode,
636  h->mmco[i].short_pic_num, h->mmco[i].long_arg);
637 
638  if (mmco[i].opcode == MMCO_SHORT2UNUSED ||
639  mmco[i].opcode == MMCO_SHORT2LONG) {
640  frame_num = pic_num_extract(h, mmco[i].short_pic_num, &structure);
641  pic = find_short(h, frame_num, &j);
642  if (!pic) {
643  if (mmco[i].opcode != MMCO_SHORT2LONG ||
644  !h->long_ref[mmco[i].long_arg] ||
645  h->long_ref[mmco[i].long_arg]->frame_num != frame_num) {
646  av_log(h->avctx, h->short_ref_count ? AV_LOG_ERROR : AV_LOG_DEBUG, "mmco: unref short failure\n");
647  err = AVERROR_INVALIDDATA;
648  }
649  continue;
650  }
651  }
652 
653  switch (mmco[i].opcode) {
654  case MMCO_SHORT2UNUSED:
655  if (h->avctx->debug & FF_DEBUG_MMCO)
656  av_log(h->avctx, AV_LOG_DEBUG, "mmco: unref short %d count %d\n",
658  remove_short(h, frame_num, structure ^ PICT_FRAME);
659  break;
660  case MMCO_SHORT2LONG:
661  if (h->long_ref[mmco[i].long_arg] != pic)
662  remove_long(h, mmco[i].long_arg, 0);
663 
664  remove_short_at_index(h, j);
665  h->long_ref[ mmco[i].long_arg ] = pic;
666  if (h->long_ref[mmco[i].long_arg]) {
667  h->long_ref[mmco[i].long_arg]->long_ref = 1;
668  h->long_ref_count++;
669  }
670  break;
671  case MMCO_LONG2UNUSED:
672  j = pic_num_extract(h, mmco[i].long_arg, &structure);
673  pic = h->long_ref[j];
674  if (pic) {
675  remove_long(h, j, structure ^ PICT_FRAME);
676  } else if (h->avctx->debug & FF_DEBUG_MMCO)
677  av_log(h->avctx, AV_LOG_DEBUG, "mmco: unref long failure\n");
678  break;
679  case MMCO_LONG:
680  // Comment below left from previous code as it is an interresting note.
681  /* First field in pair is in short term list or
682  * at a different long term index.
683  * This is not allowed; see 7.4.3.3, notes 2 and 3.
684  * Report the problem and keep the pair where it is,
685  * and mark this field valid.
686  */
687  if (h->short_ref[0] == h->cur_pic_ptr) {
688  av_log(h->avctx, AV_LOG_ERROR, "mmco: cannot assign current picture to short and long at the same time\n");
689  remove_short_at_index(h, 0);
690  }
691 
692  /* make sure the current picture is not already assigned as a long ref */
693  if (h->cur_pic_ptr->long_ref) {
694  for (j = 0; j < FF_ARRAY_ELEMS(h->long_ref); j++) {
695  if (h->long_ref[j] == h->cur_pic_ptr) {
696  if (j != mmco[i].long_arg)
697  av_log(h->avctx, AV_LOG_ERROR, "mmco: cannot assign current picture to 2 long term references\n");
698  remove_long(h, j, 0);
699  }
700  }
701  }
702 
703  if (h->long_ref[mmco[i].long_arg] != h->cur_pic_ptr) {
705  remove_long(h, mmco[i].long_arg, 0);
706 
707  h->long_ref[mmco[i].long_arg] = h->cur_pic_ptr;
708  h->long_ref[mmco[i].long_arg]->long_ref = 1;
709  h->long_ref_count++;
710  }
711 
713  current_ref_assigned = 1;
714  break;
715  case MMCO_SET_MAX_LONG:
716  assert(mmco[i].long_arg <= 16);
717  // just remove the long term which index is greater than new max
718  for (j = mmco[i].long_arg; j < 16; j++) {
719  remove_long(h, j, 0);
720  }
721  break;
722  case MMCO_RESET:
723  while (h->short_ref_count) {
724  remove_short(h, h->short_ref[0]->frame_num, 0);
725  }
726  for (j = 0; j < 16; j++) {
727  remove_long(h, j, 0);
728  }
729  h->frame_num = h->cur_pic_ptr->frame_num = 0;
730  h->mmco_reset = 1;
731  h->cur_pic_ptr->mmco_reset = 1;
732  for (j = 0; j < MAX_DELAYED_PIC_COUNT; j++)
733  h->last_pocs[j] = INT_MIN;
734  break;
735  default: assert(0);
736  }
737  }
738 
739  if (!current_ref_assigned) {
740  /* Second field of complementary field pair; the first field of
741  * which is already referenced. If short referenced, it
742  * should be first entry in short_ref. If not, it must exist
743  * in long_ref; trying to put it on the short list here is an
744  * error in the encoded bit stream (ref: 7.4.3.3, NOTE 2 and 3).
745  */
746  if (h->short_ref_count && h->short_ref[0] == h->cur_pic_ptr) {
747  /* Just mark the second field valid */
749  } else if (h->cur_pic_ptr->long_ref) {
750  av_log(h->avctx, AV_LOG_ERROR, "illegal short term reference "
751  "assignment for second field "
752  "in complementary field pair "
753  "(first field is long term)\n");
754  err = AVERROR_INVALIDDATA;
755  } else {
756  pic = remove_short(h, h->cur_pic_ptr->frame_num, 0);
757  if (pic) {
758  av_log(h->avctx, AV_LOG_ERROR, "illegal short term buffer state detected\n");
759  err = AVERROR_INVALIDDATA;
760  }
761 
762  if (h->short_ref_count)
763  memmove(&h->short_ref[1], &h->short_ref[0],
764  h->short_ref_count * sizeof(H264Picture*));
765 
766  h->short_ref[0] = h->cur_pic_ptr;
767  h->short_ref_count++;
769  }
770  }
771 
772  if (h->long_ref_count + h->short_ref_count > FFMAX(h->sps.ref_frame_count, 1)) {
773 
774  /* We have too many reference frames, probably due to corrupted
775  * stream. Need to discard one frame. Prevents overrun of the
776  * short_ref and long_ref buffers.
777  */
779  "number of reference frames (%d+%d) exceeds max (%d; probably "
780  "corrupt input), discarding one\n",
782  err = AVERROR_INVALIDDATA;
783 
784  if (h->long_ref_count && !h->short_ref_count) {
785  for (i = 0; i < 16; ++i)
786  if (h->long_ref[i])
787  break;
788 
789  assert(i < 16);
790  remove_long(h, i, 0);
791  } else {
792  pic = h->short_ref[h->short_ref_count - 1];
793  remove_short(h, pic->frame_num, 0);
794  }
795  }
796 
797  for (i = 0; i<h->short_ref_count; i++) {
798  pic = h->short_ref[i];
799  if (pic->invalid_gap) {
800  int d = av_mod_uintp2(h->cur_pic_ptr->frame_num - pic->frame_num, h->sps.log2_max_frame_num);
801  if (d > h->sps.ref_frame_count)
802  remove_short(h, pic->frame_num, 0);
803  }
804  }
805 
806  print_short_term(h);
807  print_long_term(h);
808 
809  pps_count = 0;
810  for (i = 0; i < FF_ARRAY_ELEMS(h->pps_buffers); i++) {
811  pps_count += !!h->pps_buffers[i];
812  pps_ref_count[0] = FFMAX(pps_ref_count[0], h->pps.ref_count[0]);
813  pps_ref_count[1] = FFMAX(pps_ref_count[1], h->pps.ref_count[1]);
814  }
815 
816  if ( err >= 0
817  && h->long_ref_count==0
818  && ( h->short_ref_count<=2
819  || pps_ref_count[0] <= 1 + (h->picture_structure != PICT_FRAME) && pps_ref_count[1] <= 1)
820  && pps_ref_count[0]<=2 + (h->picture_structure != PICT_FRAME) + (2*!h->has_recovery_point)
822  h->cur_pic_ptr->recovered |= 1;
823  if(!h->avctx->has_b_frames)
825  }
826 
827  return (h->avctx->err_recognition & AV_EF_EXPLODE) ? err : 0;
828 }
829 
831  int first_slice)
832 {
833  int i, ret;
834  MMCO mmco_temp[MAX_MMCO_COUNT], *mmco = mmco_temp;
835  int mmco_index = 0;
836 
837  if (h->nal_unit_type == NAL_IDR_SLICE) { // FIXME fields
838  skip_bits1(gb); // broken_link
839  if (get_bits1(gb)) {
840  mmco[0].opcode = MMCO_LONG;
841  mmco[0].long_arg = 0;
842  mmco_index = 1;
843  }
844  } else {
845  if (get_bits1(gb)) { // adaptive_ref_pic_marking_mode_flag
846  for (i = 0; i < MAX_MMCO_COUNT; i++) {
847  MMCOOpcode opcode = get_ue_golomb_31(gb);
848 
849  mmco[i].opcode = opcode;
850  if (opcode == MMCO_SHORT2UNUSED || opcode == MMCO_SHORT2LONG) {
851  mmco[i].short_pic_num =
852  (h->curr_pic_num - get_ue_golomb_long(gb) - 1) &
853  (h->max_pic_num - 1);
854 #if 0
855  if (mmco[i].short_pic_num >= h->short_ref_count ||
856  !h->short_ref[mmco[i].short_pic_num]) {
857  av_log(s->avctx, AV_LOG_ERROR,
858  "illegal short ref in memory management control "
859  "operation %d\n", mmco);
860  return -1;
861  }
862 #endif
863  }
864  if (opcode == MMCO_SHORT2LONG || opcode == MMCO_LONG2UNUSED ||
865  opcode == MMCO_LONG || opcode == MMCO_SET_MAX_LONG) {
866  unsigned int long_arg = get_ue_golomb_31(gb);
867  if (long_arg >= 32 ||
868  (long_arg >= 16 && !(opcode == MMCO_SET_MAX_LONG &&
869  long_arg == 16) &&
870  !(opcode == MMCO_LONG2UNUSED && FIELD_PICTURE(h)))) {
872  "illegal long ref in memory management control "
873  "operation %d\n", opcode);
874  return -1;
875  }
876  mmco[i].long_arg = long_arg;
877  }
878 
879  if (opcode > (unsigned) MMCO_LONG) {
881  "illegal memory management control operation %d\n",
882  opcode);
883  return -1;
884  }
885  if (opcode == MMCO_END)
886  break;
887  }
888  mmco_index = i;
889  } else {
890  if (first_slice) {
891  ret = ff_generate_sliding_window_mmcos(h, first_slice);
892  if (ret < 0 && h->avctx->err_recognition & AV_EF_EXPLODE)
893  return ret;
894  }
895  mmco_index = -1;
896  }
897  }
898 
899  if (first_slice && mmco_index != -1) {
900  memcpy(h->mmco, mmco_temp, sizeof(h->mmco));
901  h->mmco_index = mmco_index;
902  } else if (!first_slice && mmco_index >= 0 &&
903  (mmco_index != h->mmco_index ||
904  check_opcodes(h->mmco, mmco_temp, mmco_index))) {
906  "Inconsistent MMCO state between slices [%d, %d]\n",
907  mmco_index, h->mmco_index);
908  return AVERROR_INVALIDDATA;
909  }
910 
911  return 0;
912 }
static int split_field_copy(H264Ref *dest, H264Picture *src, int parity, int id_add)
Definition: h264_refs.c:61
#define ff_tlog(ctx,...)
Definition: internal.h:65
void ff_h264_unref_picture(H264Context *h, H264Picture *pic)
Definition: h264_picture.c:47
#define NULL
Definition: coverity.c:32
Memory management control operation.
Definition: h264.h:310
static int pic_num_extract(H264Context *h, int pic_num, int *structure)
Extract structure information about the picture described by pic_num in the current decoding context ...
Definition: h264_refs.c:228
static int add_sorted(H264Picture **sorted, H264Picture **src, int len, int limit, int dir)
Definition: h264_refs.c:103
int long_ref
1->long term reference 0->short term reference
Definition: h264.h:342
const char * s
Definition: avisynth_c.h:631
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
This structure describes decoded (raw) audio or video data.
Definition: frame.h:180
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
void ff_h264_fill_mbaff_ref_list(H264Context *h, H264SliceContext *sl)
Definition: h264_refs.c:372
static H264Picture * remove_short(H264Context *h, int frame_num, int ref_mask)
Definition: h264_refs.c:472
int first_field
Definition: h264.h:590
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:359
static int check_opcodes(MMCO *mmco1, MMCO *mmco2, int n_mmcos)
Definition: h264_refs.c:574
MMCO mmco[MAX_MMCO_COUNT]
memory management control operations buffer.
Definition: h264.h:677
int chroma_weight[48][2][2][2]
Definition: h264_parse.h:38
unsigned int ref_count[2]
num_ref_idx_l0/1_active_minus1 + 1
Definition: h264.h:248
#define DELAYED_PIC_REF
Value of Picture.reference when Picture is not a reference picture, but is held for delayed output...
Definition: diracdec.c:64
H264Picture * delayed_pic[MAX_DELAYED_PIC_COUNT+2]
Definition: h264.h:669
int mmco_index
Definition: h264.h:678
H264Ref default_ref[2]
Definition: h264.h:666
MMCOOpcode
Memory management control operation opcode.
Definition: h264.h:297
H264Context.
Definition: h264.h:514
AVFrame * f
Definition: h264.h:317
H264Picture * long_ref[32]
Definition: h264.h:668
int picture_structure
Definition: h264.h:589
MMCOOpcode opcode
Definition: h264.h:311
unsigned int ref_count[2]
num_ref_idx_l0/1_active_minus1 + 1
Definition: h264.h:457
void ff_h264_remove_all_refs(H264Context *h)
Definition: h264_refs.c:511
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int short_pic_num
pic_num without wrapping (pic_num & max_pic_num)
Definition: h264.h:312
Definition: h264.h:358
int poc
Definition: h264.h:363
int poc
frame POC
Definition: h264.h:336
int ff_h264_decode_ref_pic_marking(H264Context *h, GetBitContext *gb, int first_slice)
Definition: h264_refs.c:830
static AVFrame * frame
int frame_recovered
Initial frame has been completely recovered.
Definition: h264.h:801
#define PICT_BOTTOM_FIELD
Definition: mpegutils.h:38
#define MAX_DELAYED_PIC_COUNT
Definition: h264.h:57
int luma_weight[48][2][2]
Definition: h264_parse.h:37
H264Picture * parent
Definition: h264.h:366
int recovered
picture at IDR or recovery point + recovery count
Definition: h264.h:349
int ff_generate_sliding_window_mmcos(H264Context *h, int first_slice)
Definition: h264_refs.c:589
#define av_log(a,...)
int last_pocs[MAX_DELAYED_PIC_COUNT]
Definition: h264.h:670
static int ref[MAX_W *MAX_W]
H.264 / AVC / MPEG4 part10 codec.
#define U(x)
Definition: vp56_arith.h:37
int frame_num
Definition: h264.h:649
int width
width and height of the video frame
Definition: frame.h:232
#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:1964
static int get_ue_golomb(GetBitContext *gb)
Read an unsigned Exp-Golomb code in the range 0 to 8190.
Definition: golomb.h:53
int nal_unit_type
Definition: h264.h:626
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
PPS pps
current pps
Definition: h264.h:576
simple assert() macros that are a bit more flexible than ISO C assert().
#define PICT_TOP_FIELD
Definition: mpegutils.h:37
static int build_def_list(H264Ref *def, int def_len, H264Picture **in, int len, int is_long, int sel)
Definition: h264_refs.c:77
int frame_num
frame_num (raw frame_num from slice header)
Definition: h264.h:337
#define FFMAX(a, b)
Definition: common.h:94
int slice_type_nos
S free slice type (SI/SP are remapped to I/P)
Definition: h264.h:376
int pic_id
Definition: h264.h:364
static int unreference_pic(H264Context *h, H264Picture *pic, int refmask)
Mark a picture as no longer needed for reference.
Definition: h264_refs.c:415
static int mismatches_ref(H264Context *h, H264Picture *pic)
Definition: h264_refs.c:125
uint8_t * data[3]
Definition: h264.h:359
int ref_frame_count
num_ref_frames
Definition: h264.h:190
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:254
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:2929
int reference
Definition: h264.h:348
#define FIELD_PICTURE(h)
Definition: h264.h:77
int nb_slice_ctx
Definition: h264.h:529
H264PredWeightTable pwt
Definition: h264.h:389
int long_ref_count
number of actual long term references
Definition: h264.h:681
int ff_h264_ref_picture(H264Context *h, H264Picture *dst, H264Picture *src)
Definition: h264_picture.c:68
SPS sps
current sps
Definition: h264.h:575
PPS * pps_buffers[MAX_PPS_COUNT]
Definition: h264.h:638
mcdeint parity
Definition: vf_mcdeint.c:277
int mmco_reset
Definition: h264.h:679
H264SliceContext * slice_ctx
Definition: h264.h:528
#define FF_DEBUG_MMCO
Definition: avcodec.h:2900
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2940
int reference
Definition: h264.h:362
int max_pic_num
max_frame_num or 2 * max_frame_num for field pics.
Definition: h264.h:664
int curr_pic_num
frame_num for frames or 2 * frame_num + 1 for field pics.
Definition: h264.h:659
#define src
Definition: vp9dsp.c:530
static void remove_short_at_index(H264Context *h, int i)
Remove a picture from the short term reference list by its index in that list.
Definition: h264_refs.c:460
static void ref_from_h264pic(H264Ref *dst, H264Picture *src)
Definition: h264_refs.c:51
#define FF_ARRAY_ELEMS(a)
static H264Picture * find_short(H264Context *h, int frame_num, int *idx)
Find a H264Picture in the short term reference list by frame number.
Definition: h264_refs.c:438
static const float pred[4]
Definition: siprdata.h:259
static unsigned get_ue_golomb_long(GetBitContext *gb)
Read an unsigned Exp-Golomb code in the range 0 to UINT32_MAX-1.
Definition: golomb.h:85
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:244
AVCodecContext * avctx
Definition: h264.h:516
int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count)
Execute the reference picture marking (memory management control operations).
Definition: h264_refs.c:621
Libavcodec external API header.
static int get_ue_golomb_31(GetBitContext *gb)
read unsigned exp golomb code, constraint to a max of 31.
Definition: golomb.h:100
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:211
H264Picture * short_ref[32]
Definition: h264.h:667
int field_poc[2]
top/bottom POC
Definition: h264.h:335
int debug
debug
Definition: avcodec.h:2881
Definition: h264.h:298
int av_buffer_get_ref_count(const AVBufferRef *buf)
Definition: buffer.c:145
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-> in
AVBuffer * buffer
Definition: buffer.h:82
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:312
static void skip_bits1(GetBitContext *s)
Definition: get_bits.h:337
int index
Definition: gxfenc.c:89
#define MAX_MMCO_COUNT
Definition: h264.h:55
int mmco_reset
MMCO_RESET set this 1.
Definition: h264.h:338
static H264Picture * remove_long(H264Context *h, int i, int ref_mask)
Remove a picture from the long term reference list by its index in that list.
Definition: h264_refs.c:494
H264Picture * cur_pic_ptr
Definition: h264.h:524
int linesize[3]
Definition: h264.h:360
unsigned int list_count
Definition: h264.h:458
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:194
int has_recovery_point
Definition: h264.h:803
int pic_id
pic_num (short -> no wrap version of pic_num, pic_num & max_pic_num; long -> long_pic_num) ...
Definition: h264.h:340
static void pic_as_field(H264Ref *pic, const int parity)
Definition: h264_refs.c:39
common internal api header.
if(ret< 0)
Definition: vf_mcdeint.c:282
#define FRAME_RECOVERED_SEI
Sufficient number of frames have been decoded since a SEI recovery point, so all the following frames...
Definition: h264.h:799
int log2_max_frame_num
log2_max_frame_num_minus4 + 4
Definition: h264.h:183
Bi-dir predicted.
Definition: avutil.h:268
int long_arg
index, pic_num, or num long refs depending on opcode
Definition: h264.h:313
#define PICT_FRAME
Definition: mpegutils.h:39
int len
static void h264_initialise_ref_list(H264Context *h, H264SliceContext *sl)
Definition: h264_refs.c:133
static void print_long_term(H264Context *h)
print long term list
Definition: h264_refs.c:559
int ff_h264_decode_ref_pic_list_reordering(H264Context *h, H264SliceContext *sl)
Definition: h264_refs.c:241
H264Ref ref_list[2][48]
0..15: frame refs, 16..47: mbaff field refs.
Definition: h264.h:459
H264Picture last_pic_for_ec
Definition: h264.h:526
#define av_uninit(x)
Definition: attributes.h:149
int height
Definition: frame.h:232
#define FFSWAP(type, a, b)
Definition: common.h:99
exp golomb vlc stuff
static void print_short_term(H264Context *h)
print short term list
Definition: h264_refs.c:543
GetBitContext gb
Definition: h264.h:371
for(j=16;j >0;--j)
int short_ref_count
number of actual short term references
Definition: h264.h:682