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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  p->parse_history[p->parse_history_count++] = buf[i];
125  if (p->parse_history_count > 5) {
126  unsigned int mb, last_mb = p->parse_last_mb;
127  GetBitContext gb;
128 
130  p->parse_history_count = 0;
131  mb= get_ue_golomb_long(&gb);
132  p->parse_last_mb = mb;
133  if (pc->frame_start_found) {
134  if (mb <= last_mb)
135  goto found;
136  } else
137  pc->frame_start_found = 1;
138  state = 7;
139  }
140  }
141  }
142  pc->state = state;
143  if (p->is_avc)
144  return next_avc;
145  return END_NOT_FOUND;
146 
147 found:
148  pc->state = 7;
149  pc->frame_start_found = 0;
150  if (p->is_avc)
151  return next_avc;
152  return i - (state & 5) - 5 * (state > 7);
153 }
154 
156  void *logctx)
157 {
159  int slice_type_nos = s->pict_type & 3;
160  H264ParseContext *p = s->priv_data;
161  int list_count, ref_count[2];
162 
163 
165  get_ue_golomb(gb); // redundant_pic_count
166 
167  if (slice_type_nos == AV_PICTURE_TYPE_B)
168  get_bits1(gb); // direct_spatial_mv_pred
169 
170  if (ff_h264_parse_ref_count(&list_count, ref_count, gb, p->ps.pps,
171  slice_type_nos, p->picture_structure, logctx) < 0)
172  return AVERROR_INVALIDDATA;
173 
174  if (slice_type_nos != AV_PICTURE_TYPE_I) {
175  int list;
176  for (list = 0; list < list_count; list++) {
177  if (get_bits1(gb)) {
178  int index;
179  for (index = 0; ; index++) {
180  unsigned int reordering_of_pic_nums_idc = get_ue_golomb_31(gb);
181 
182  if (reordering_of_pic_nums_idc < 3)
183  get_ue_golomb_long(gb);
184  else if (reordering_of_pic_nums_idc > 3) {
185  av_log(logctx, AV_LOG_ERROR,
186  "illegal reordering_of_pic_nums_idc %d\n",
187  reordering_of_pic_nums_idc);
188  return AVERROR_INVALIDDATA;
189  } else
190  break;
191 
192  if (index >= ref_count[list]) {
193  av_log(logctx, AV_LOG_ERROR,
194  "reference count %d overflow\n", index);
195  return AVERROR_INVALIDDATA;
196  }
197  }
198  }
199  }
200  }
201 
202  if ((p->ps.pps->weighted_pred && slice_type_nos == AV_PICTURE_TYPE_P) ||
203  (p->ps.pps->weighted_bipred_idc == 1 && slice_type_nos == AV_PICTURE_TYPE_B))
204  ff_h264_pred_weight_table(gb, p->ps.sps, ref_count, slice_type_nos,
205  &pwt, p->picture_structure, logctx);
206 
207  if (get_bits1(gb)) { // adaptive_ref_pic_marking_mode_flag
208  int i;
209  for (i = 0; i < MAX_MMCO_COUNT; i++) {
210  MMCOOpcode opcode = get_ue_golomb_31(gb);
211  if (opcode > (unsigned) MMCO_LONG) {
212  av_log(logctx, AV_LOG_ERROR,
213  "illegal memory management control operation %d\n",
214  opcode);
215  return AVERROR_INVALIDDATA;
216  }
217  if (opcode == MMCO_END)
218  return 0;
219  else if (opcode == MMCO_RESET)
220  return 1;
221 
222  if (opcode == MMCO_SHORT2UNUSED || opcode == MMCO_SHORT2LONG)
223  get_ue_golomb_long(gb); // difference_of_pic_nums_minus1
224  if (opcode == MMCO_SHORT2LONG || opcode == MMCO_LONG2UNUSED ||
225  opcode == MMCO_LONG || opcode == MMCO_SET_MAX_LONG)
226  get_ue_golomb_31(gb);
227  }
228  }
229 
230  return 0;
231 }
232 
233 /**
234  * Parse NAL units of found picture and decode some basic information.
235  *
236  * @param s parser context.
237  * @param avctx codec context.
238  * @param buf buffer with field/frame data.
239  * @param buf_size size of the buffer.
240  */
242  AVCodecContext *avctx,
243  const uint8_t * const buf, int buf_size)
244 {
245  H264ParseContext *p = s->priv_data;
246  H2645RBSP rbsp = { NULL };
247  H2645NAL nal = { NULL };
248  int buf_index, next_avc;
249  unsigned int pps_id;
250  unsigned int slice_type;
251  int state = -1, got_reset = 0;
252  int q264 = buf_size >=4 && !memcmp("Q264", buf, 4);
253  int field_poc[2];
254  int ret;
255 
256  /* set some sane default values */
258  s->key_frame = 0;
260 
261  ff_h264_sei_uninit(&p->sei);
263 
264  if (!buf_size)
265  return 0;
266 
268  if (!rbsp.rbsp_buffer)
269  return AVERROR(ENOMEM);
270 
271  buf_index = 0;
272  next_avc = p->is_avc ? 0 : buf_size;
273  for (;;) {
274  const SPS *sps;
275  int src_length, consumed, nalsize = 0;
276 
277  if (buf_index >= next_avc) {
278  nalsize = get_nalsize(p->nal_length_size, buf, buf_size, &buf_index, avctx);
279  if (nalsize < 0)
280  break;
281  next_avc = buf_index + nalsize;
282  } else {
283  buf_index = find_start_code(buf, buf_size, buf_index, next_avc);
284  if (buf_index >= buf_size)
285  break;
286  if (buf_index >= next_avc)
287  continue;
288  }
289  src_length = next_avc - buf_index;
290 
291  state = buf[buf_index];
292  switch (state & 0x1f) {
293  case H264_NAL_SLICE:
294  case H264_NAL_IDR_SLICE:
295  // Do not walk the whole buffer just to decode slice header
296  if ((state & 0x1f) == H264_NAL_IDR_SLICE || ((state >> 5) & 0x3) == 0) {
297  /* IDR or disposable slice
298  * No need to decode many bytes because MMCOs shall not be present. */
299  if (src_length > 60)
300  src_length = 60;
301  } else {
302  /* To decode up to MMCOs */
303  if (src_length > 1000)
304  src_length = 1000;
305  }
306  break;
307  }
308  consumed = ff_h2645_extract_rbsp(buf + buf_index, src_length, &rbsp, &nal, 1);
309  if (consumed < 0)
310  break;
311 
312  buf_index += consumed;
313 
314  ret = init_get_bits8(&nal.gb, nal.data, nal.size);
315  if (ret < 0)
316  goto fail;
317  get_bits1(&nal.gb);
318  nal.ref_idc = get_bits(&nal.gb, 2);
319  nal.type = get_bits(&nal.gb, 5);
320 
321  switch (nal.type) {
322  case H264_NAL_SPS:
323  ff_h264_decode_seq_parameter_set(&nal.gb, avctx, &p->ps, 0);
324  break;
325  case H264_NAL_PPS:
326  ff_h264_decode_picture_parameter_set(&nal.gb, avctx, &p->ps,
327  nal.size_bits);
328  break;
329  case H264_NAL_SEI:
330  ff_h264_sei_decode(&p->sei, &nal.gb, &p->ps, avctx);
331  break;
332  case H264_NAL_IDR_SLICE:
333  s->key_frame = 1;
334 
335  p->poc.prev_frame_num = 0;
336  p->poc.prev_frame_num_offset = 0;
337  p->poc.prev_poc_msb =
338  p->poc.prev_poc_lsb = 0;
339  /* fall through */
340  case H264_NAL_SLICE:
341  get_ue_golomb_long(&nal.gb); // skip first_mb_in_slice
342  slice_type = get_ue_golomb_31(&nal.gb);
343  s->pict_type = ff_h264_golomb_to_pict_type[slice_type % 5];
344  if (p->sei.recovery_point.recovery_frame_cnt >= 0) {
345  /* key frame, since recovery_frame_cnt is set */
346  s->key_frame = 1;
347  }
348  pps_id = get_ue_golomb(&nal.gb);
349  if (pps_id >= MAX_PPS_COUNT) {
350  av_log(avctx, AV_LOG_ERROR,
351  "pps_id %u out of range\n", pps_id);
352  goto fail;
353  }
354  if (!p->ps.pps_list[pps_id]) {
355  av_log(avctx, AV_LOG_ERROR,
356  "non-existing PPS %u referenced\n", pps_id);
357  goto fail;
358  }
359 
362  p->ps.pps = NULL;
363  p->ps.sps = NULL;
364  p->ps.pps_ref = av_buffer_ref(p->ps.pps_list[pps_id]);
365  if (!p->ps.pps_ref)
366  goto fail;
367  p->ps.pps = (const PPS*)p->ps.pps_ref->data;
368 
369  if (!p->ps.sps_list[p->ps.pps->sps_id]) {
370  av_log(avctx, AV_LOG_ERROR,
371  "non-existing SPS %u referenced\n", p->ps.pps->sps_id);
372  goto fail;
373  }
374 
375  p->ps.sps_ref = av_buffer_ref(p->ps.sps_list[p->ps.pps->sps_id]);
376  if (!p->ps.sps_ref)
377  goto fail;
378  p->ps.sps = (const SPS*)p->ps.sps_ref->data;
379 
380  sps = p->ps.sps;
381 
382  // heuristic to detect non marked keyframes
383  if (p->ps.sps->ref_frame_count <= 1 && p->ps.pps->ref_count[0] <= 1 && s->pict_type == AV_PICTURE_TYPE_I)
384  s->key_frame = 1;
385 
386  p->poc.frame_num = get_bits(&nal.gb, sps->log2_max_frame_num);
387 
388  s->coded_width = 16 * sps->mb_width;
389  s->coded_height = 16 * sps->mb_height;
390  s->width = s->coded_width - (sps->crop_right + sps->crop_left);
391  s->height = s->coded_height - (sps->crop_top + sps->crop_bottom);
392  if (s->width <= 0 || s->height <= 0) {
393  s->width = s->coded_width;
394  s->height = s->coded_height;
395  }
396 
397  switch (sps->bit_depth_luma) {
398  case 9:
399  if (sps->chroma_format_idc == 3) s->format = AV_PIX_FMT_YUV444P9;
400  else if (sps->chroma_format_idc == 2) s->format = AV_PIX_FMT_YUV422P9;
401  else s->format = AV_PIX_FMT_YUV420P9;
402  break;
403  case 10:
404  if (sps->chroma_format_idc == 3) s->format = AV_PIX_FMT_YUV444P10;
405  else if (sps->chroma_format_idc == 2) s->format = AV_PIX_FMT_YUV422P10;
406  else s->format = AV_PIX_FMT_YUV420P10;
407  break;
408  case 8:
409  if (sps->chroma_format_idc == 3) s->format = AV_PIX_FMT_YUV444P;
410  else if (sps->chroma_format_idc == 2) s->format = AV_PIX_FMT_YUV422P;
411  else s->format = AV_PIX_FMT_YUV420P;
412  break;
413  default:
414  s->format = AV_PIX_FMT_NONE;
415  }
416 
417  avctx->profile = ff_h264_get_profile(sps);
418  avctx->level = sps->level_idc;
419 
420  if (sps->frame_mbs_only_flag) {
422  } else {
423  if (get_bits1(&nal.gb)) { // field_pic_flag
424  p->picture_structure = PICT_TOP_FIELD + get_bits1(&nal.gb); // bottom_field_flag
425  } else {
427  }
428  }
429 
430  if (nal.type == H264_NAL_IDR_SLICE)
431  get_ue_golomb_long(&nal.gb); /* idr_pic_id */
432  if (sps->poc_type == 0) {
433  p->poc.poc_lsb = get_bits(&nal.gb, sps->log2_max_poc_lsb);
434 
435  if (p->ps.pps->pic_order_present == 1 &&
438  }
439 
440  if (sps->poc_type == 1 &&
442  p->poc.delta_poc[0] = get_se_golomb(&nal.gb);
443 
444  if (p->ps.pps->pic_order_present == 1 &&
446  p->poc.delta_poc[1] = get_se_golomb(&nal.gb);
447  }
448 
449  /* Decode POC of this picture.
450  * The prev_ values needed for decoding POC of the next picture are not set here. */
451  field_poc[0] = field_poc[1] = INT_MAX;
452  ret = ff_h264_init_poc(field_poc, &s->output_picture_number, sps,
453  &p->poc, p->picture_structure, nal.ref_idc);
454  if (ret < 0)
455  goto fail;
456 
457  /* Continue parsing to check if MMCO_RESET is present.
458  * FIXME: MMCO_RESET could appear in non-first slice.
459  * Maybe, we should parse all undisposable non-IDR slice of this
460  * picture until encountering MMCO_RESET in a slice of it. */
461  if (nal.ref_idc && nal.type != H264_NAL_IDR_SLICE) {
462  got_reset = scan_mmco_reset(s, &nal.gb, avctx);
463  if (got_reset < 0)
464  goto fail;
465  }
466 
467  /* Set up the prev_ values for decoding POC of the next picture. */
468  p->poc.prev_frame_num = got_reset ? 0 : p->poc.frame_num;
469  p->poc.prev_frame_num_offset = got_reset ? 0 : p->poc.frame_num_offset;
470  if (nal.ref_idc != 0) {
471  if (!got_reset) {
472  p->poc.prev_poc_msb = p->poc.poc_msb;
473  p->poc.prev_poc_lsb = p->poc.poc_lsb;
474  } else {
475  p->poc.prev_poc_msb = 0;
476  p->poc.prev_poc_lsb =
477  p->picture_structure == PICT_BOTTOM_FIELD ? 0 : field_poc[0];
478  }
479  }
480 
482  switch (p->sei.picture_timing.pic_struct) {
485  s->repeat_pict = 0;
486  break;
490  s->repeat_pict = 1;
491  break;
494  s->repeat_pict = 2;
495  break;
497  s->repeat_pict = 3;
498  break;
500  s->repeat_pict = 5;
501  break;
502  default:
503  s->repeat_pict = p->picture_structure == PICT_FRAME ? 1 : 0;
504  break;
505  }
506  } else {
507  s->repeat_pict = p->picture_structure == PICT_FRAME ? 1 : 0;
508  }
509 
510  if (p->picture_structure == PICT_FRAME) {
513  switch (p->sei.picture_timing.pic_struct) {
517  break;
521  break;
522  default:
524  break;
525  }
526  } else {
527  if (field_poc[0] < field_poc[1])
529  else if (field_poc[0] > field_poc[1])
531  else
533  }
534  } else {
537  else
539  if (p->poc.frame_num == p->last_frame_num &&
545  else
547  } else {
549  }
551  p->last_frame_num = p->poc.frame_num;
552  }
553 
554  av_freep(&rbsp.rbsp_buffer);
555  return 0; /* no need to evaluate the rest */
556  }
557  }
558  if (q264) {
559  av_freep(&rbsp.rbsp_buffer);
560  return 0;
561  }
562  /* didn't find a picture! */
563  av_log(avctx, AV_LOG_ERROR, "missing picture in access unit with size %d\n", buf_size);
564 fail:
565  av_freep(&rbsp.rbsp_buffer);
566  return -1;
567 }
568 
570  AVCodecContext *avctx,
571  const uint8_t **poutbuf, int *poutbuf_size,
572  const uint8_t *buf, int buf_size)
573 {
574  H264ParseContext *p = s->priv_data;
575  ParseContext *pc = &p->pc;
576  int next;
577 
578  if (!p->got_first) {
579  p->got_first = 1;
580  if (avctx->extradata_size) {
582  &p->ps, &p->is_avc, &p->nal_length_size,
583  avctx->err_recognition, avctx);
584  }
585  }
586 
588  next = buf_size;
589  } else {
590  next = h264_find_frame_end(p, buf, buf_size, avctx);
591 
592  if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
593  *poutbuf = NULL;
594  *poutbuf_size = 0;
595  return buf_size;
596  }
597 
598  if (next < 0 && next != END_NOT_FOUND) {
599  av_assert1(pc->last_index + next >= 0);
600  h264_find_frame_end(p, &pc->buffer[pc->last_index + next], -next, avctx); // update state
601  }
602  }
603 
604  parse_nal_units(s, avctx, buf, buf_size);
605 
606  if (avctx->framerate.num)
607  avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1}));
608  if (p->sei.picture_timing.cpb_removal_delay >= 0) {
609  s->dts_sync_point = p->sei.buffering_period.present;
610  s->dts_ref_dts_delta = p->sei.picture_timing.cpb_removal_delay;
611  s->pts_dts_delta = p->sei.picture_timing.dpb_output_delay;
612  } else {
613  s->dts_sync_point = INT_MIN;
614  s->dts_ref_dts_delta = INT_MIN;
615  s->pts_dts_delta = INT_MIN;
616  }
617 
618  if (s->flags & PARSER_FLAG_ONCE) {
619  s->flags &= PARSER_FLAG_COMPLETE_FRAMES;
620  }
621 
622  if (s->dts_sync_point >= 0) {
623  int64_t den = avctx->time_base.den * (int64_t)avctx->pkt_timebase.num;
624  if (den > 0) {
625  int64_t num = avctx->time_base.num * (int64_t)avctx->pkt_timebase.den;
626  if (s->dts != AV_NOPTS_VALUE) {
627  // got DTS from the stream, update reference timestamp
628  p->reference_dts = s->dts - av_rescale(s->dts_ref_dts_delta, num, den);
629  } else if (p->reference_dts != AV_NOPTS_VALUE) {
630  // compute DTS based on reference timestamp
631  s->dts = p->reference_dts + av_rescale(s->dts_ref_dts_delta, num, den);
632  }
633 
634  if (p->reference_dts != AV_NOPTS_VALUE && s->pts == AV_NOPTS_VALUE)
635  s->pts = s->dts + av_rescale(s->pts_dts_delta, num, den);
636 
637  if (s->dts_sync_point > 0)
638  p->reference_dts = s->dts; // new reference
639  }
640  }
641 
642  *poutbuf = buf;
643  *poutbuf_size = buf_size;
644  return next;
645 }
646 
647 static int h264_split(AVCodecContext *avctx,
648  const uint8_t *buf, int buf_size)
649 {
650  uint32_t state = -1;
651  int has_sps = 0;
652  int has_pps = 0;
653  const uint8_t *ptr = buf, *end = buf + buf_size;
654  int nalu_type;
655 
656  while (ptr < end) {
657  ptr = avpriv_find_start_code(ptr, end, &state);
658  if ((state & 0xFFFFFF00) != 0x100)
659  break;
660  nalu_type = state & 0x1F;
661  if (nalu_type == H264_NAL_SPS) {
662  has_sps = 1;
663  } else if (nalu_type == H264_NAL_PPS)
664  has_pps = 1;
665  /* else if (nalu_type == 0x01 ||
666  * nalu_type == 0x02 ||
667  * nalu_type == 0x05) {
668  * }
669  */
670  else if ((nalu_type != H264_NAL_SEI || has_pps) &&
671  nalu_type != H264_NAL_AUD && nalu_type != H264_NAL_SPS_EXT &&
672  nalu_type != 0x0f) {
673  if (has_sps) {
674  while (ptr - 4 > buf && ptr[-5] == 0)
675  ptr--;
676  return ptr - 4 - buf;
677  }
678  }
679  }
680 
681  return 0;
682 }
683 
685 {
686  H264ParseContext *p = s->priv_data;
687  ParseContext *pc = &p->pc;
688 
689  av_freep(&pc->buffer);
690 
691  ff_h264_sei_uninit(&p->sei);
692  ff_h264_ps_uninit(&p->ps);
693 }
694 
696 {
697  H264ParseContext *p = s->priv_data;
698 
700  p->last_frame_num = INT_MAX;
701  ff_h264dsp_init(&p->h264dsp, 8, 1);
702  return 0;
703 }
704 
707  .priv_data_size = sizeof(H264ParseContext),
708  .parser_init = init,
709  .parser_parse = h264_parse,
710  .parser_close = h264_close,
711  .split = h264_split,
712 };
int chroma_format_idc
Definition: h264_ps.h:47
int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int bit_length)
Decode PPS.
Definition: h264_ps.c:725
#define NULL
Definition: coverity.c:32
AVRational framerate
Definition: avcodec.h:3013
const char * s
Definition: avisynth_c.h:768
#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:112
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:67
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:261
int weighted_bipred_idc
Definition: h264_ps.h:116
Memory handling functions.
AVBufferRef * sps_list[MAX_SPS_COUNT]
Definition: h264_ps.h:138
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:5124
Sequence parameter set.
Definition: h264_ps.h:43
uint8_t parse_history[6]
Definition: h264_parser.c:60
enum AVFieldOrder field_order
Definition: avcodec.h:5101
unsigned int ref_count[2]
num_ref_idx_l0/1_active_minus1 + 1
Definition: h264_ps.h:114
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:5145
Picture parameter set.
Definition: h264_ps.h:108
int coded_width
Dimensions of the coded video.
Definition: avcodec.h:5130
Convenience header that includes libavutil's core.
int frame_mbs_only_flag
Definition: h264_ps.h:61
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:241
int profile
profile
Definition: avcodec.h:2828
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:1625
unsigned int crop_top
frame_cropping_rect_top_offset
Definition: h264_ps.h:69
const PPS * pps
Definition: h264_ps.h:144
enum AVPictureStructure picture_structure
Indicate whether a picture is coded as a frame, top field or bottom field.
Definition: avcodec.h:5111
4: bottom field, top field, in that order
Definition: h264_sei.h:48
uint8_t
#define av_cold
Definition: attributes.h:82
#define mb
unsigned int crop_left
frame_cropping_rect_left_offset
Definition: h264_ps.h:67
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:68
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1603
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:122
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.
H.264 parameter set handling.
H264POCContext poc
Definition: h264_parser.c:54
AVBufferRef * sps_ref
Definition: h264_ps.h:142
#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:50
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:318
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:115
#define PICT_TOP_FIELD
Definition: mpegutils.h:37
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:371
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:114
int delta_pic_order_always_zero_flag
Definition: h264_ps.h:52
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:66
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:366
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:56
H264_SEI_PicStructType pic_struct
Definition: h264_sei.h:70
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:2627
#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
int level
level
Definition: avcodec.h:2926
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:1634
int ref_idc
H.264 only, nal_ref_idc.
Definition: h2645_parse.h:64
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:367
int type
NAL unit type.
Definition: h2645_parse.h:51
AVCodecParser ff_h264_parser
Definition: h264_parser.c:705
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:111
static void h264_close(AVCodecParserContext *s)
Definition: h264_parser.c:684
uint8_t * buffer
Definition: parser.h:29
5: top field, bottom field, top field repeated, in that order
Definition: h264_sei.h:49
Libavcodec external API header.
AVBufferRef * pps_list[MAX_PPS_COUNT]
Definition: h264_ps.h:139
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:456
main external API structure.
Definition: avcodec.h:1503
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:1604
int rbsp_buffer_alloc_size
Definition: h2645_parse.h:69
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:313
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:368
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:647
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:425
static int FUNC() sps(CodedBitstreamContext *ctx, RWContext *rw, H264RawSPS *current)
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:365
const SPS * sps
Definition: h264_ps.h:145
#define END_NOT_FOUND
Definition: parser.h:40
unsigned int sps_id
Definition: h264_ps.h:109
H264SEIPictureTiming picture_timing
Definition: h264_sei.h:156
int log2_max_poc_lsb
log2_max_pic_order_cnt_lsb_minus4
Definition: h264_ps.h:51
H264SEIRecoveryPoint recovery_point
Definition: h264_sei.h:160
3: top field, bottom field, in that order
Definition: h264_sei.h:47
int output_picture_number
Picture number incremented in presentation or output order.
Definition: avcodec.h:5119
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:369
int pic_struct_present_flag
Definition: h264_ps.h:91
int prev_poc_lsb
poc_lsb of the last reference pic for POC type 0
Definition: h264_parse.h:50
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
#define PARSER_FLAG_ONCE
Definition: avcodec.h:5012
int mb_height
Definition: h264_ps.h:60
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
common internal api header.
if(ret< 0)
Definition: vf_mcdeint.c:279
AVBufferRef * pps_ref
Definition: h264_ps.h:141
int log2_max_frame_num
log2_max_frame_num_minus4 + 4
Definition: h264_ps.h:49
H264SEIFramePacking frame_packing
Definition: h264_sei.h:162
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:5011
void ff_h264_ps_uninit(H264ParamSets *ps)
Uninit H264 param sets structure.
Definition: h264_ps.c:317
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:695
GetBitContext gb
Definition: h2645_parse.h:46
int bit_depth_luma
bit_depth_luma_minus8 + 8
Definition: h264_ps.h:97
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:334
int format
The format of the coded data, corresponds to enum AVPixelFormat for video and for enum AVSampleFormat...
Definition: avcodec.h:5141
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:58
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:4995
#define av_freep(p)
int ff_h264_sei_decode(H264SEIContext *h, GetBitContext *gb, const H264ParamSets *ps, void *logctx)
Definition: h264_sei.c:391
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:569
int64_t reference_dts
Definition: h264_parser.c:63
unsigned int crop_bottom
frame_cropping_rect_bottom_offset
Definition: h264_ps.h:70
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:33
int key_frame
Set by parser to 1 for key frames and 0 for non-key frames.
Definition: avcodec.h:5026
int level_idc
Definition: h264_ps.h:46
int arrangement_cancel_flag
is previous arrangement canceled, -1 if never received
Definition: h264_sei.h:123
static int scan_mmco_reset(AVCodecParserContext *s, GetBitContext *gb, void *logctx)
Definition: h264_parser.c:155
6: bottom field, top field, bottom field repeated, in that order
Definition: h264_sei.h:50
static struct @280 state
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
Predicted.
Definition: avutil.h:275
#define MAX_MMCO_COUNT
Definition: h264dec.h:54