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h264_parser.c
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1 /*
2  * H.26L/H.264/AVC/JVT/14496-10/... parser
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 / MPEG-4 part10 parser.
25  * @author Michael Niedermayer <michaelni@gmx.at>
26  */
27 
28 #define UNCHECKED_BITSTREAM_READER 1
29 
30 #include <assert.h>
31 #include <stdint.h>
32 
33 #include "libavutil/avutil.h"
34 #include "libavutil/error.h"
35 #include "libavutil/log.h"
36 #include "libavutil/mem.h"
37 #include "libavutil/pixfmt.h"
38 
39 #include "avcodec.h"
40 #include "get_bits.h"
41 #include "golomb.h"
42 #include "h264.h"
43 #include "h264_sei.h"
44 #include "h264_ps.h"
45 #include "h264data.h"
46 #include "internal.h"
47 #include "mpegutils.h"
48 #include "parser.h"
49 
50 typedef struct H264ParseContext {
56  int is_avc;
58  int got_first;
63  int64_t reference_dts;
66 
67 
69  int buf_size, void *logctx)
70 {
71  int i, j;
72  uint32_t state;
73  ParseContext *pc = &p->pc;
74 
75  int next_avc = p->is_avc ? 0 : buf_size;
76 // mb_addr= pc->mb_addr - 1;
77  state = pc->state;
78  if (state > 13)
79  state = 7;
80 
81  if (p->is_avc && !p->nal_length_size)
82  av_log(logctx, AV_LOG_ERROR, "AVC-parser: nal length size invalid\n");
83 
84  for (i = 0; i < buf_size; i++) {
85  if (i >= next_avc) {
86  int nalsize = 0;
87  i = next_avc;
88  for (j = 0; j < p->nal_length_size; j++)
89  nalsize = (nalsize << 8) | buf[i++];
90  if (nalsize <= 0 || nalsize > buf_size - i) {
91  av_log(logctx, AV_LOG_ERROR, "AVC-parser: nal size %d remaining %d\n", nalsize, buf_size - i);
92  return buf_size;
93  }
94  next_avc = i + nalsize;
95  state = 5;
96  }
97 
98  if (state == 7) {
99  i += p->h264dsp.startcode_find_candidate(buf + i, next_avc - i);
100  if (i < next_avc)
101  state = 2;
102  } else if (state <= 2) {
103  if (buf[i] == 1)
104  state ^= 5; // 2->7, 1->4, 0->5
105  else if (buf[i])
106  state = 7;
107  else
108  state >>= 1; // 2->1, 1->0, 0->0
109  } else if (state <= 5) {
110  int nalu_type = buf[i] & 0x1F;
111  if (nalu_type == H264_NAL_SEI || nalu_type == H264_NAL_SPS ||
112  nalu_type == H264_NAL_PPS || nalu_type == H264_NAL_AUD) {
113  if (pc->frame_start_found) {
114  i++;
115  goto found;
116  }
117  } else if (nalu_type == H264_NAL_SLICE || nalu_type == H264_NAL_DPA ||
118  nalu_type == H264_NAL_IDR_SLICE) {
119  state += 8;
120  continue;
121  }
122  state = 7;
123  } else {
124  unsigned int mb, last_mb = p->parse_last_mb;
125  GetBitContext gb;
126  p->parse_history[p->parse_history_count++] = buf[i];
127 
129  mb= get_ue_golomb_long(&gb);
130  if (get_bits_left(&gb) > 0 || p->parse_history_count > 5) {
131  p->parse_last_mb = mb;
132  if (pc->frame_start_found) {
133  if (mb <= last_mb) {
134  i -= p->parse_history_count - 1;
135  p->parse_history_count = 0;
136  goto found;
137  }
138  } else
139  pc->frame_start_found = 1;
140  p->parse_history_count = 0;
141  state = 7;
142  }
143  }
144  }
145  pc->state = state;
146  if (p->is_avc)
147  return next_avc;
148  return END_NOT_FOUND;
149 
150 found:
151  pc->state = 7;
152  pc->frame_start_found = 0;
153  if (p->is_avc)
154  return next_avc;
155  return i - (state & 5);
156 }
157 
159  void *logctx)
160 {
162  int slice_type_nos = s->pict_type & 3;
163  H264ParseContext *p = s->priv_data;
164  int list_count, ref_count[2];
165 
166 
168  get_ue_golomb(gb); // redundant_pic_count
169 
170  if (slice_type_nos == AV_PICTURE_TYPE_B)
171  get_bits1(gb); // direct_spatial_mv_pred
172 
173  if (ff_h264_parse_ref_count(&list_count, ref_count, gb, p->ps.pps,
174  slice_type_nos, p->picture_structure, logctx) < 0)
175  return AVERROR_INVALIDDATA;
176 
177  if (slice_type_nos != AV_PICTURE_TYPE_I) {
178  int list;
179  for (list = 0; list < list_count; list++) {
180  if (get_bits1(gb)) {
181  int index;
182  for (index = 0; ; index++) {
183  unsigned int reordering_of_pic_nums_idc = get_ue_golomb_31(gb);
184 
185  if (reordering_of_pic_nums_idc < 3)
186  get_ue_golomb_long(gb);
187  else if (reordering_of_pic_nums_idc > 3) {
188  av_log(logctx, AV_LOG_ERROR,
189  "illegal reordering_of_pic_nums_idc %d\n",
190  reordering_of_pic_nums_idc);
191  return AVERROR_INVALIDDATA;
192  } else
193  break;
194 
195  if (index >= ref_count[list]) {
196  av_log(logctx, AV_LOG_ERROR,
197  "reference count %d overflow\n", index);
198  return AVERROR_INVALIDDATA;
199  }
200  }
201  }
202  }
203  }
204 
205  if ((p->ps.pps->weighted_pred && slice_type_nos == AV_PICTURE_TYPE_P) ||
206  (p->ps.pps->weighted_bipred_idc == 1 && slice_type_nos == AV_PICTURE_TYPE_B))
207  ff_h264_pred_weight_table(gb, p->ps.sps, ref_count, slice_type_nos,
208  &pwt, p->picture_structure, logctx);
209 
210  if (get_bits1(gb)) { // adaptive_ref_pic_marking_mode_flag
211  int i;
212  for (i = 0; i < MAX_MMCO_COUNT; i++) {
213  MMCOOpcode opcode = get_ue_golomb_31(gb);
214  if (opcode > (unsigned) MMCO_LONG) {
215  av_log(logctx, AV_LOG_ERROR,
216  "illegal memory management control operation %d\n",
217  opcode);
218  return AVERROR_INVALIDDATA;
219  }
220  if (opcode == MMCO_END)
221  return 0;
222  else if (opcode == MMCO_RESET)
223  return 1;
224 
225  if (opcode == MMCO_SHORT2UNUSED || opcode == MMCO_SHORT2LONG)
226  get_ue_golomb_long(gb); // difference_of_pic_nums_minus1
227  if (opcode == MMCO_SHORT2LONG || opcode == MMCO_LONG2UNUSED ||
228  opcode == MMCO_LONG || opcode == MMCO_SET_MAX_LONG)
229  get_ue_golomb_31(gb);
230  }
231  }
232 
233  return 0;
234 }
235 
236 /**
237  * Parse NAL units of found picture and decode some basic information.
238  *
239  * @param s parser context.
240  * @param avctx codec context.
241  * @param buf buffer with field/frame data.
242  * @param buf_size size of the buffer.
243  */
245  AVCodecContext *avctx,
246  const uint8_t * const buf, int buf_size)
247 {
248  H264ParseContext *p = s->priv_data;
249  H2645RBSP rbsp = { NULL };
250  H2645NAL nal = { NULL };
251  int buf_index, next_avc;
252  unsigned int pps_id;
253  unsigned int slice_type;
254  int state = -1, got_reset = 0;
255  int q264 = buf_size >=4 && !memcmp("Q264", buf, 4);
256  int field_poc[2];
257  int ret;
258 
259  /* set some sane default values */
261  s->key_frame = 0;
263 
264  ff_h264_sei_uninit(&p->sei);
266 
267  if (!buf_size)
268  return 0;
269 
271  if (!rbsp.rbsp_buffer)
272  return AVERROR(ENOMEM);
273 
274  buf_index = 0;
275  next_avc = p->is_avc ? 0 : buf_size;
276  for (;;) {
277  const SPS *sps;
278  int src_length, consumed, nalsize = 0;
279 
280  if (buf_index >= next_avc) {
281  nalsize = get_nalsize(p->nal_length_size, buf, buf_size, &buf_index, avctx);
282  if (nalsize < 0)
283  break;
284  next_avc = buf_index + nalsize;
285  } else {
286  buf_index = find_start_code(buf, buf_size, buf_index, next_avc);
287  if (buf_index >= buf_size)
288  break;
289  if (buf_index >= next_avc)
290  continue;
291  }
292  src_length = next_avc - buf_index;
293 
294  state = buf[buf_index];
295  switch (state & 0x1f) {
296  case H264_NAL_SLICE:
297  case H264_NAL_IDR_SLICE:
298  // Do not walk the whole buffer just to decode slice header
299  if ((state & 0x1f) == H264_NAL_IDR_SLICE || ((state >> 5) & 0x3) == 0) {
300  /* IDR or disposable slice
301  * No need to decode many bytes because MMCOs shall not be present. */
302  if (src_length > 60)
303  src_length = 60;
304  } else {
305  /* To decode up to MMCOs */
306  if (src_length > 1000)
307  src_length = 1000;
308  }
309  break;
310  }
311  consumed = ff_h2645_extract_rbsp(buf + buf_index, src_length, &rbsp, &nal, 1);
312  if (consumed < 0)
313  break;
314 
315  buf_index += consumed;
316 
317  ret = init_get_bits8(&nal.gb, nal.data, nal.size);
318  if (ret < 0)
319  goto fail;
320  get_bits1(&nal.gb);
321  nal.ref_idc = get_bits(&nal.gb, 2);
322  nal.type = get_bits(&nal.gb, 5);
323 
324  switch (nal.type) {
325  case H264_NAL_SPS:
326  ff_h264_decode_seq_parameter_set(&nal.gb, avctx, &p->ps, 0);
327  break;
328  case H264_NAL_PPS:
329  ff_h264_decode_picture_parameter_set(&nal.gb, avctx, &p->ps,
330  nal.size_bits);
331  break;
332  case H264_NAL_SEI:
333  ff_h264_sei_decode(&p->sei, &nal.gb, &p->ps, avctx);
334  break;
335  case H264_NAL_IDR_SLICE:
336  s->key_frame = 1;
337 
338  p->poc.prev_frame_num = 0;
339  p->poc.prev_frame_num_offset = 0;
340  p->poc.prev_poc_msb =
341  p->poc.prev_poc_lsb = 0;
342  /* fall through */
343  case H264_NAL_SLICE:
344  get_ue_golomb_long(&nal.gb); // skip first_mb_in_slice
345  slice_type = get_ue_golomb_31(&nal.gb);
346  s->pict_type = ff_h264_golomb_to_pict_type[slice_type % 5];
347  if (p->sei.recovery_point.recovery_frame_cnt >= 0) {
348  /* key frame, since recovery_frame_cnt is set */
349  s->key_frame = 1;
350  }
351  pps_id = get_ue_golomb(&nal.gb);
352  if (pps_id >= MAX_PPS_COUNT) {
353  av_log(avctx, AV_LOG_ERROR,
354  "pps_id %u out of range\n", pps_id);
355  goto fail;
356  }
357  if (!p->ps.pps_list[pps_id]) {
358  av_log(avctx, AV_LOG_ERROR,
359  "non-existing PPS %u referenced\n", pps_id);
360  goto fail;
361  }
362 
365  p->ps.pps = NULL;
366  p->ps.sps = NULL;
367  p->ps.pps_ref = av_buffer_ref(p->ps.pps_list[pps_id]);
368  if (!p->ps.pps_ref)
369  goto fail;
370  p->ps.pps = (const PPS*)p->ps.pps_ref->data;
371 
372  if (!p->ps.sps_list[p->ps.pps->sps_id]) {
373  av_log(avctx, AV_LOG_ERROR,
374  "non-existing SPS %u referenced\n", p->ps.pps->sps_id);
375  goto fail;
376  }
377 
378  p->ps.sps_ref = av_buffer_ref(p->ps.sps_list[p->ps.pps->sps_id]);
379  if (!p->ps.sps_ref)
380  goto fail;
381  p->ps.sps = (const SPS*)p->ps.sps_ref->data;
382 
383  sps = p->ps.sps;
384 
385  // heuristic to detect non marked keyframes
386  if (p->ps.sps->ref_frame_count <= 1 && p->ps.pps->ref_count[0] <= 1 && s->pict_type == AV_PICTURE_TYPE_I)
387  s->key_frame = 1;
388 
389  p->poc.frame_num = get_bits(&nal.gb, sps->log2_max_frame_num);
390 
391  s->coded_width = 16 * sps->mb_width;
392  s->coded_height = 16 * sps->mb_height;
393  s->width = s->coded_width - (sps->crop_right + sps->crop_left);
394  s->height = s->coded_height - (sps->crop_top + sps->crop_bottom);
395  if (s->width <= 0 || s->height <= 0) {
396  s->width = s->coded_width;
397  s->height = s->coded_height;
398  }
399 
400  switch (sps->bit_depth_luma) {
401  case 9:
402  if (sps->chroma_format_idc == 3) s->format = AV_PIX_FMT_YUV444P9;
403  else if (sps->chroma_format_idc == 2) s->format = AV_PIX_FMT_YUV422P9;
404  else s->format = AV_PIX_FMT_YUV420P9;
405  break;
406  case 10:
407  if (sps->chroma_format_idc == 3) s->format = AV_PIX_FMT_YUV444P10;
408  else if (sps->chroma_format_idc == 2) s->format = AV_PIX_FMT_YUV422P10;
409  else s->format = AV_PIX_FMT_YUV420P10;
410  break;
411  case 8:
412  if (sps->chroma_format_idc == 3) s->format = AV_PIX_FMT_YUV444P;
413  else if (sps->chroma_format_idc == 2) s->format = AV_PIX_FMT_YUV422P;
414  else s->format = AV_PIX_FMT_YUV420P;
415  break;
416  default:
417  s->format = AV_PIX_FMT_NONE;
418  }
419 
420  avctx->profile = ff_h264_get_profile(sps);
421  avctx->level = sps->level_idc;
422 
423  if (sps->frame_mbs_only_flag) {
425  } else {
426  if (get_bits1(&nal.gb)) { // field_pic_flag
427  p->picture_structure = PICT_TOP_FIELD + get_bits1(&nal.gb); // bottom_field_flag
428  } else {
430  }
431  }
432 
433  if (nal.type == H264_NAL_IDR_SLICE)
434  get_ue_golomb_long(&nal.gb); /* idr_pic_id */
435  if (sps->poc_type == 0) {
436  p->poc.poc_lsb = get_bits(&nal.gb, sps->log2_max_poc_lsb);
437 
438  if (p->ps.pps->pic_order_present == 1 &&
441  }
442 
443  if (sps->poc_type == 1 &&
445  p->poc.delta_poc[0] = get_se_golomb(&nal.gb);
446 
447  if (p->ps.pps->pic_order_present == 1 &&
449  p->poc.delta_poc[1] = get_se_golomb(&nal.gb);
450  }
451 
452  /* Decode POC of this picture.
453  * The prev_ values needed for decoding POC of the next picture are not set here. */
454  field_poc[0] = field_poc[1] = INT_MAX;
455  ret = ff_h264_init_poc(field_poc, &s->output_picture_number, sps,
456  &p->poc, p->picture_structure, nal.ref_idc);
457  if (ret < 0)
458  goto fail;
459 
460  /* Continue parsing to check if MMCO_RESET is present.
461  * FIXME: MMCO_RESET could appear in non-first slice.
462  * Maybe, we should parse all undisposable non-IDR slice of this
463  * picture until encountering MMCO_RESET in a slice of it. */
464  if (nal.ref_idc && nal.type != H264_NAL_IDR_SLICE) {
465  got_reset = scan_mmco_reset(s, &nal.gb, avctx);
466  if (got_reset < 0)
467  goto fail;
468  }
469 
470  /* Set up the prev_ values for decoding POC of the next picture. */
471  p->poc.prev_frame_num = got_reset ? 0 : p->poc.frame_num;
472  p->poc.prev_frame_num_offset = got_reset ? 0 : p->poc.frame_num_offset;
473  if (nal.ref_idc != 0) {
474  if (!got_reset) {
475  p->poc.prev_poc_msb = p->poc.poc_msb;
476  p->poc.prev_poc_lsb = p->poc.poc_lsb;
477  } else {
478  p->poc.prev_poc_msb = 0;
479  p->poc.prev_poc_lsb =
480  p->picture_structure == PICT_BOTTOM_FIELD ? 0 : field_poc[0];
481  }
482  }
483 
485  switch (p->sei.picture_timing.pic_struct) {
488  s->repeat_pict = 0;
489  break;
493  s->repeat_pict = 1;
494  break;
497  s->repeat_pict = 2;
498  break;
500  s->repeat_pict = 3;
501  break;
503  s->repeat_pict = 5;
504  break;
505  default:
506  s->repeat_pict = p->picture_structure == PICT_FRAME ? 1 : 0;
507  break;
508  }
509  } else {
510  s->repeat_pict = p->picture_structure == PICT_FRAME ? 1 : 0;
511  }
512 
513  if (p->picture_structure == PICT_FRAME) {
516  switch (p->sei.picture_timing.pic_struct) {
520  break;
524  break;
525  default:
527  break;
528  }
529  } else {
530  if (field_poc[0] < field_poc[1])
532  else if (field_poc[0] > field_poc[1])
534  else
536  }
537  } else {
540  else
542  if (p->poc.frame_num == p->last_frame_num &&
548  else
550  } else {
552  }
554  p->last_frame_num = p->poc.frame_num;
555  }
556 
557  av_freep(&rbsp.rbsp_buffer);
558  return 0; /* no need to evaluate the rest */
559  }
560  }
561  if (q264) {
562  av_freep(&rbsp.rbsp_buffer);
563  return 0;
564  }
565  /* didn't find a picture! */
566  av_log(avctx, AV_LOG_ERROR, "missing picture in access unit with size %d\n", buf_size);
567 fail:
568  av_freep(&rbsp.rbsp_buffer);
569  return -1;
570 }
571 
573  AVCodecContext *avctx,
574  const uint8_t **poutbuf, int *poutbuf_size,
575  const uint8_t *buf, int buf_size)
576 {
577  H264ParseContext *p = s->priv_data;
578  ParseContext *pc = &p->pc;
579  int next;
580 
581  if (!p->got_first) {
582  p->got_first = 1;
583  if (avctx->extradata_size) {
585  &p->ps, &p->is_avc, &p->nal_length_size,
586  avctx->err_recognition, avctx);
587  }
588  }
589 
591  next = buf_size;
592  } else {
593  next = h264_find_frame_end(p, buf, buf_size, avctx);
594 
595  if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
596  *poutbuf = NULL;
597  *poutbuf_size = 0;
598  return buf_size;
599  }
600 
601  if (next < 0 && next != END_NOT_FOUND) {
602  av_assert1(pc->last_index + next >= 0);
603  h264_find_frame_end(p, &pc->buffer[pc->last_index + next], -next, avctx); // update state
604  }
605  }
606 
607  parse_nal_units(s, avctx, buf, buf_size);
608 
609  if (avctx->framerate.num)
610  avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1}));
611  if (p->sei.picture_timing.cpb_removal_delay >= 0) {
612  s->dts_sync_point = p->sei.buffering_period.present;
613  s->dts_ref_dts_delta = p->sei.picture_timing.cpb_removal_delay;
614  s->pts_dts_delta = p->sei.picture_timing.dpb_output_delay;
615  } else {
616  s->dts_sync_point = INT_MIN;
617  s->dts_ref_dts_delta = INT_MIN;
618  s->pts_dts_delta = INT_MIN;
619  }
620 
621  if (s->flags & PARSER_FLAG_ONCE) {
622  s->flags &= PARSER_FLAG_COMPLETE_FRAMES;
623  }
624 
625  if (s->dts_sync_point >= 0) {
626  int64_t den = avctx->time_base.den * (int64_t)avctx->pkt_timebase.num;
627  if (den > 0) {
628  int64_t num = avctx->time_base.num * (int64_t)avctx->pkt_timebase.den;
629  if (s->dts != AV_NOPTS_VALUE) {
630  // got DTS from the stream, update reference timestamp
631  p->reference_dts = s->dts - av_rescale(s->dts_ref_dts_delta, num, den);
632  } else if (p->reference_dts != AV_NOPTS_VALUE) {
633  // compute DTS based on reference timestamp
634  s->dts = p->reference_dts + av_rescale(s->dts_ref_dts_delta, num, den);
635  }
636 
637  if (p->reference_dts != AV_NOPTS_VALUE && s->pts == AV_NOPTS_VALUE)
638  s->pts = s->dts + av_rescale(s->pts_dts_delta, num, den);
639 
640  if (s->dts_sync_point > 0)
641  p->reference_dts = s->dts; // new reference
642  }
643  }
644 
645  *poutbuf = buf;
646  *poutbuf_size = buf_size;
647  return next;
648 }
649 
650 static int h264_split(AVCodecContext *avctx,
651  const uint8_t *buf, int buf_size)
652 {
653  uint32_t state = -1;
654  int has_sps = 0;
655  int has_pps = 0;
656  const uint8_t *ptr = buf, *end = buf + buf_size;
657  int nalu_type;
658 
659  while (ptr < end) {
660  ptr = avpriv_find_start_code(ptr, end, &state);
661  if ((state & 0xFFFFFF00) != 0x100)
662  break;
663  nalu_type = state & 0x1F;
664  if (nalu_type == H264_NAL_SPS) {
665  has_sps = 1;
666  } else if (nalu_type == H264_NAL_PPS)
667  has_pps = 1;
668  /* else if (nalu_type == 0x01 ||
669  * nalu_type == 0x02 ||
670  * nalu_type == 0x05) {
671  * }
672  */
673  else if ((nalu_type != H264_NAL_SEI || has_pps) &&
674  nalu_type != H264_NAL_AUD && nalu_type != H264_NAL_SPS_EXT &&
675  nalu_type != 0x0f) {
676  if (has_sps) {
677  while (ptr - 4 > buf && ptr[-5] == 0)
678  ptr--;
679  return ptr - 4 - buf;
680  }
681  }
682  }
683 
684  return 0;
685 }
686 
688 {
689  H264ParseContext *p = s->priv_data;
690  ParseContext *pc = &p->pc;
691 
692  av_freep(&pc->buffer);
693 
694  ff_h264_sei_uninit(&p->sei);
695  ff_h264_ps_uninit(&p->ps);
696 }
697 
699 {
700  H264ParseContext *p = s->priv_data;
701 
703  p->last_frame_num = INT_MAX;
704  ff_h264dsp_init(&p->h264dsp, 8, 1);
705  return 0;
706 }
707 
710  .priv_data_size = sizeof(H264ParseContext),
711  .parser_init = init,
712  .parser_parse = h264_parse,
713  .parser_close = h264_close,
714  .split = h264_split,
715 };
int chroma_format_idc
Definition: h264_ps.h:48
int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int bit_length)
Decode PPS.
Definition: h264_ps.c:724
#define NULL
Definition: coverity.c:32
AVRational framerate
Definition: avcodec.h:3044
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
Definition: buffer.c:125
int recovery_frame_cnt
recovery_frame_cnt
Definition: h264_sei.h:113
int size
Definition: h2645_parse.h:34
static int get_se_golomb(GetBitContext *gb)
read signed exp golomb code.
Definition: golomb.h:183
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:269
int weighted_bipred_idc
Definition: h264_ps.h:117
Memory handling functions.
AVBufferRef * sps_list[MAX_SPS_COUNT]
Definition: h264_ps.h:139
int last_picture_structure
Definition: h264_parser.c:64
ParseContext pc
Definition: h264_parser.c:51
int width
Dimensions of the decoded video intended for presentation.
Definition: avcodec.h:5183
Sequence parameter set.
Definition: h264_ps.h:44
uint8_t parse_history[6]
Definition: h264_parser.c:60
enum AVFieldOrder field_order
Definition: avcodec.h:5160
unsigned int ref_count[2]
num_ref_idx_l0/1_active_minus1 + 1
Definition: h264_ps.h:115
int num
Numerator.
Definition: rational.h:59
int ff_h264_init_poc(int pic_field_poc[2], int *pic_poc, const SPS *sps, H264POCContext *pc, int picture_structure, int nal_ref_idc)
Definition: h264_parse.c:272
int codec_ids[5]
Definition: avcodec.h:5204
Picture parameter set.
Definition: h264_ps.h:109
int coded_width
Dimensions of the coded video.
Definition: avcodec.h:5189
Convenience header that includes libavutil's core.
int frame_mbs_only_flag
Definition: h264_ps.h:62
static int find_start_code(const uint8_t *buf, int buf_size, int buf_index, int next_avc)
Definition: h264dec.h:816
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end w...
Definition: utils.c:70
void ff_h264_sei_uninit(H264SEIContext *h)
Reset SEI values at the beginning of the frame.
Definition: h264_sei.c:41
H264DSPContext h264dsp
Definition: h264_parser.c:53
static int parse_nal_units(AVCodecParserContext *s, AVCodecContext *avctx, const uint8_t *const buf, int buf_size)
Parse NAL units of found picture and decode some basic information.
Definition: h264_parser.c:244
int profile
profile
Definition: avcodec.h:2847
int frame_start_found
Definition: parser.h:34
int size_bits
Size, in bits, of just the data, excluding the stop bit and any trailing padding. ...
Definition: h2645_parse.h:41
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1644
unsigned int crop_top
frame_cropping_rect_top_offset
Definition: h264_ps.h:70
const PPS * pps
Definition: h264_ps.h:145
enum AVPictureStructure picture_structure
Indicate whether a picture is coded as a frame, top field or bottom field.
Definition: avcodec.h:5170
4: bottom field, top field, in that order
Definition: h264_sei.h:50
uint8_t
#define av_cold
Definition: attributes.h:82
#define mb
unsigned int crop_left
frame_cropping_rect_left_offset
Definition: h264_ps.h:68
int frame_num_offset
for POC type 2
Definition: h264_parse.h:51
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
unsigned int crop_right
frame_cropping_rect_right_offset
Definition: h264_ps.h:69
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1622
int ff_h264_decode_extradata(const uint8_t *data, int size, H264ParamSets *ps, int *is_avc, int *nal_length_size, int err_recognition, void *logctx)
Definition: h264_parse.c:443
#define PICT_BOTTOM_FIELD
Definition: mpegutils.h:38
#define MAX_PPS_COUNT
Definition: h264_ps.h:38
int redundant_pic_cnt_present
redundant_pic_cnt_present_flag
Definition: h264_ps.h:123
bitstream reader API header.
#define av_log(a,...)
const uint8_t * avpriv_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state)
H.264 common definitions.
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:596
H.264 parameter set handling.
H264POCContext poc
Definition: h264_parser.c:54
AVBufferRef * sps_ref
Definition: h264_ps.h:143
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static int get_ue_golomb(GetBitContext *gb)
Read an unsigned Exp-Golomb code in the range 0 to 8190.
Definition: golomb.h:53
error code definitions
int poc_type
pic_order_cnt_type
Definition: h264_ps.h:51
H264ParamSets ps
Definition: h264_parser.c:52
int ff_combine_frame(ParseContext *pc, int next, const uint8_t **buf, int *buf_size)
Combine the (truncated) bitstream to a complete frame.
Definition: parser.c:234
int ff_h264_get_profile(const SPS *sps)
Compute profile from profile_idc and constraint_set?_flags.
Definition: h264_parse.c:510
#define AVERROR(e)
Definition: error.h:43
int weighted_pred
weighted_pred_flag
Definition: h264_ps.h:116
#define PICT_TOP_FIELD
Definition: mpegutils.h:37
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:382
const uint8_t ff_h264_golomb_to_pict_type[5]
Definition: h264data.c:37
MMCOOpcode
Memory management control operation opcode.
Definition: h264dec.h:109
#define fail()
Definition: checkasm.h:117
int delta_pic_order_always_zero_flag
Definition: h264_ps.h:53
static char * split(char *message, char delim)
Definition: af_channelmap.c:81
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
int ff_h264_parse_ref_count(int *plist_count, int ref_count[2], GetBitContext *gb, const PPS *pps, int slice_type_nos, int picture_structure, void *logctx)
Definition: h264_parse.c:219
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:377
int prev_poc_msb
poc_msb of the last reference pic for POC type 0
Definition: h264_parse.h:49
Context for storing H.264 DSP functions.
Definition: h264dsp.h:42
int ref_frame_count
num_ref_frames
Definition: h264_ps.h:57
H264_SEI_PicStructType pic_struct
Definition: h264_sei.h:72
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:2646
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
int last_index
Definition: parser.h:31
int(* startcode_find_candidate)(const uint8_t *buf, int size)
Search buf from the start for up to size bytes.
Definition: h264dsp.h:117
#define s(width, name)
Definition: cbs_vp9.c:257
int level
level
Definition: avcodec.h:2957
static int get_nalsize(int nal_length_size, const uint8_t *buf, int buf_size, int *buf_index, void *logctx)
Definition: h2645_parse.h:99
int ticks_per_frame
For some codecs, the time base is closer to the field rate than the frame rate.
Definition: avcodec.h:1653
int ref_idc
H.264 only, nal_ref_idc.
Definition: h2645_parse.h:64
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:378
int type
NAL unit type.
Definition: h2645_parse.h:51
AVCodecParser ff_h264_parser
Definition: h264_parser.c:708
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 pic_order_present
pic_order_present_flag
Definition: h264_ps.h:112
static void h264_close(AVCodecParserContext *s)
Definition: h264_parser.c:687
uint8_t * buffer
Definition: parser.h:29
5: top field, bottom field, top field repeated, in that order
Definition: h264_sei.h:51
Libavcodec external API header.
AVBufferRef * pps_list[MAX_PPS_COUNT]
Definition: h264_ps.h:140
static int get_ue_golomb_31(GetBitContext *gb)
read unsigned exp golomb code, constraint to a max of 31.
Definition: golomb.h:100
int delta_poc_bottom
Definition: h264_parse.h:46
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:464
main external API structure.
Definition: avcodec.h:1522
H264SEIContext sei
Definition: h264_parser.c:55
uint8_t * data
The data buffer.
Definition: buffer.h:89
const uint8_t * data
Definition: h2645_parse.h:35
void * buf
Definition: avisynth_c.h:690
uint32_t state
contains the last few bytes in MSB order
Definition: parser.h:33
int extradata_size
Definition: avcodec.h:1623
int rbsp_buffer_alloc_size
Definition: h2645_parse.h:69
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:321
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:379
int prev_frame_num
frame_num of the last pic for POC type 1/2
Definition: h264_parse.h:53
static int h264_split(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
Definition: h264_parser.c:650
int index
Definition: gxfenc.c:89
Rational number (pair of numerator and denominator).
Definition: rational.h:58
uint8_t * rbsp_buffer
Definition: h2645_parse.h:68
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:433
static int FUNC() sps(CodedBitstreamContext *ctx, RWContext *rw, H264RawSPS *current)
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:376
const SPS * sps
Definition: h264_ps.h:146
#define END_NOT_FOUND
Definition: parser.h:40
unsigned int sps_id
Definition: h264_ps.h:110
H264SEIPictureTiming picture_timing
Definition: h264_sei.h:157
int log2_max_poc_lsb
log2_max_pic_order_cnt_lsb_minus4
Definition: h264_ps.h:52
H264SEIRecoveryPoint recovery_point
Definition: h264_sei.h:161
3: top field, bottom field, in that order
Definition: h264_sei.h:49
int output_picture_number
Picture number incremented in presentation or output order.
Definition: avcodec.h:5178
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:380
int pic_struct_present_flag
Definition: h264_ps.h:92
int prev_poc_lsb
poc_lsb of the last reference pic for POC type 0
Definition: h264_parse.h:50
static struct @282 state
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
#define PARSER_FLAG_ONCE
Definition: avcodec.h:5071
int mb_height
Definition: h264_ps.h:61
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
common internal api header.
if(ret< 0)
Definition: vf_mcdeint.c:279
AVBufferRef * pps_ref
Definition: h264_ps.h:142
int log2_max_frame_num
log2_max_frame_num_minus4 + 4
Definition: h264_ps.h:50
H264SEIFramePacking frame_packing
Definition: h264_sei.h:163
AVBufferRef * av_buffer_ref(AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:93
Bi-dir predicted.
Definition: avutil.h:276
#define PARSER_FLAG_COMPLETE_FRAMES
Definition: avcodec.h:5070
void ff_h264_ps_uninit(H264ParamSets *ps)
Uninit H264 param sets structure.
Definition: h264_ps.c:316
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:698
GetBitContext gb
Definition: h2645_parse.h:46
int bit_depth_luma
bit_depth_luma_minus8 + 8
Definition: h264_ps.h:98
int delta_poc[2]
Definition: h264_parse.h:47
#define PICT_FRAME
Definition: mpegutils.h:39
static int h264_find_frame_end(H264ParseContext *p, const uint8_t *buf, int buf_size, void *logctx)
Definition: h264_parser.c:68
pixel format definitions
int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int ignore_truncation)
Decode SPS.
Definition: h264_ps.c:333
int format
The format of the coded data, corresponds to enum AVPixelFormat for video and for enum AVSampleFormat...
Definition: avcodec.h:5200
int ff_h264_pred_weight_table(GetBitContext *gb, const SPS *sps, const int *ref_count, int slice_type_nos, H264PredWeightTable *pwt, int picture_structure, void *logctx)
Definition: h264_parse.c:27
int mb_width
pic_width_in_mbs_minus1 + 1
Definition: h264_ps.h:59
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
av_cold void ff_h264dsp_init(H264DSPContext *c, const int bit_depth, const int chroma_format_idc)
Definition: h264dsp.c:67
int repeat_pict
This field is used for proper frame duration computation in lavf.
Definition: avcodec.h:5054
#define av_freep(p)
int ff_h264_sei_decode(H264SEIContext *h, GetBitContext *gb, const H264ParamSets *ps, void *logctx)
Definition: h264_sei.c:398
int prev_frame_num_offset
for POC type 2
Definition: h264_parse.h:52
static int h264_parse(AVCodecParserContext *s, AVCodecContext *avctx, const uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size)
Definition: h264_parser.c:572
int64_t reference_dts
Definition: h264_parser.c:63
unsigned int crop_bottom
frame_cropping_rect_bottom_offset
Definition: h264_ps.h:71
exp golomb vlc stuff
int ff_h2645_extract_rbsp(const uint8_t *src, int length, H2645RBSP *rbsp, H2645NAL *nal, int small_padding)
Extract the raw (unescaped) bitstream.
Definition: h2645_parse.c:34
int key_frame
Set by parser to 1 for key frames and 0 for non-key frames.
Definition: avcodec.h:5085
int level_idc
Definition: h264_ps.h:47
int arrangement_cancel_flag
is previous arrangement canceled, -1 if never received
Definition: h264_sei.h:124
static int scan_mmco_reset(AVCodecParserContext *s, GetBitContext *gb, void *logctx)
Definition: h264_parser.c:158
6: bottom field, top field, bottom field repeated, in that order
Definition: h264_sei.h:52
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
Predicted.
Definition: avutil.h:275
#define MAX_MMCO_COUNT
Definition: h264dec.h:54