FFmpeg  4.3.6
h264_parse.c
Go to the documentation of this file.
1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include "bytestream.h"
20 #include "get_bits.h"
21 #include "golomb.h"
22 #include "h264.h"
23 #include "h264dec.h"
24 #include "h264_parse.h"
25 #include "h264_ps.h"
26 
28  const int *ref_count, int slice_type_nos,
30  int picture_structure, void *logctx)
31 {
32  int list, i, j;
33  int luma_def, chroma_def;
34 
35  pwt->use_weight = 0;
36  pwt->use_weight_chroma = 0;
37 
39  if (pwt->luma_log2_weight_denom > 7U) {
40  av_log(logctx, AV_LOG_ERROR, "luma_log2_weight_denom %d is out of range\n", pwt->luma_log2_weight_denom);
41  pwt->luma_log2_weight_denom = 0;
42  }
43  luma_def = 1 << pwt->luma_log2_weight_denom;
44 
45  if (sps->chroma_format_idc) {
47  if (pwt->chroma_log2_weight_denom > 7U) {
48  av_log(logctx, AV_LOG_ERROR, "chroma_log2_weight_denom %d is out of range\n", pwt->chroma_log2_weight_denom);
49  pwt->chroma_log2_weight_denom = 0;
50  }
51  chroma_def = 1 << pwt->chroma_log2_weight_denom;
52  }
53 
54  for (list = 0; list < 2; list++) {
55  pwt->luma_weight_flag[list] = 0;
56  pwt->chroma_weight_flag[list] = 0;
57  for (i = 0; i < ref_count[list]; i++) {
58  int luma_weight_flag, chroma_weight_flag;
59 
60  luma_weight_flag = get_bits1(gb);
61  if (luma_weight_flag) {
62  pwt->luma_weight[i][list][0] = get_se_golomb(gb);
63  pwt->luma_weight[i][list][1] = get_se_golomb(gb);
64  if ((int8_t)pwt->luma_weight[i][list][0] != pwt->luma_weight[i][list][0] ||
65  (int8_t)pwt->luma_weight[i][list][1] != pwt->luma_weight[i][list][1])
66  goto out_range_weight;
67  if (pwt->luma_weight[i][list][0] != luma_def ||
68  pwt->luma_weight[i][list][1] != 0) {
69  pwt->use_weight = 1;
70  pwt->luma_weight_flag[list] = 1;
71  }
72  } else {
73  pwt->luma_weight[i][list][0] = luma_def;
74  pwt->luma_weight[i][list][1] = 0;
75  }
76 
77  if (sps->chroma_format_idc) {
78  chroma_weight_flag = get_bits1(gb);
79  if (chroma_weight_flag) {
80  int j;
81  for (j = 0; j < 2; j++) {
82  pwt->chroma_weight[i][list][j][0] = get_se_golomb(gb);
83  pwt->chroma_weight[i][list][j][1] = get_se_golomb(gb);
84  if ((int8_t)pwt->chroma_weight[i][list][j][0] != pwt->chroma_weight[i][list][j][0] ||
85  (int8_t)pwt->chroma_weight[i][list][j][1] != pwt->chroma_weight[i][list][j][1]) {
86  pwt->chroma_weight[i][list][j][0] = chroma_def;
87  pwt->chroma_weight[i][list][j][1] = 0;
88  goto out_range_weight;
89  }
90  if (pwt->chroma_weight[i][list][j][0] != chroma_def ||
91  pwt->chroma_weight[i][list][j][1] != 0) {
92  pwt->use_weight_chroma = 1;
93  pwt->chroma_weight_flag[list] = 1;
94  }
95  }
96  } else {
97  int j;
98  for (j = 0; j < 2; j++) {
99  pwt->chroma_weight[i][list][j][0] = chroma_def;
100  pwt->chroma_weight[i][list][j][1] = 0;
101  }
102  }
103  }
104 
105  // for MBAFF
106  if (picture_structure == PICT_FRAME) {
107  pwt->luma_weight[16 + 2 * i][list][0] = pwt->luma_weight[16 + 2 * i + 1][list][0] = pwt->luma_weight[i][list][0];
108  pwt->luma_weight[16 + 2 * i][list][1] = pwt->luma_weight[16 + 2 * i + 1][list][1] = pwt->luma_weight[i][list][1];
109  if (sps->chroma_format_idc) {
110  for (j = 0; j < 2; j++) {
111  pwt->chroma_weight[16 + 2 * i][list][j][0] = pwt->chroma_weight[16 + 2 * i + 1][list][j][0] = pwt->chroma_weight[i][list][j][0];
112  pwt->chroma_weight[16 + 2 * i][list][j][1] = pwt->chroma_weight[16 + 2 * i + 1][list][j][1] = pwt->chroma_weight[i][list][j][1];
113  }
114  }
115  }
116  }
117  if (slice_type_nos != AV_PICTURE_TYPE_B)
118  break;
119  }
120  pwt->use_weight = pwt->use_weight || pwt->use_weight_chroma;
121  return 0;
122 out_range_weight:
123  avpriv_request_sample(logctx, "Out of range weight");
124  return AVERROR_INVALIDDATA;
125 }
126 
127 /**
128  * Check if the top & left blocks are available if needed and
129  * change the dc mode so it only uses the available blocks.
130  */
131 int ff_h264_check_intra4x4_pred_mode(int8_t *pred_mode_cache, void *logctx,
132  int top_samples_available, int left_samples_available)
133 {
134  static const int8_t top[12] = {
135  -1, 0, LEFT_DC_PRED, -1, -1, -1, -1, -1, 0
136  };
137  static const int8_t left[12] = {
138  0, -1, TOP_DC_PRED, 0, -1, -1, -1, 0, -1, DC_128_PRED
139  };
140  int i;
141 
142  if (!(top_samples_available & 0x8000)) {
143  for (i = 0; i < 4; i++) {
144  int status = top[pred_mode_cache[scan8[0] + i]];
145  if (status < 0) {
146  av_log(logctx, AV_LOG_ERROR,
147  "top block unavailable for requested intra mode %d\n",
148  status);
149  return AVERROR_INVALIDDATA;
150  } else if (status) {
151  pred_mode_cache[scan8[0] + i] = status;
152  }
153  }
154  }
155 
156  if ((left_samples_available & 0x8888) != 0x8888) {
157  static const int mask[4] = { 0x8000, 0x2000, 0x80, 0x20 };
158  for (i = 0; i < 4; i++)
159  if (!(left_samples_available & mask[i])) {
160  int status = left[pred_mode_cache[scan8[0] + 8 * i]];
161  if (status < 0) {
162  av_log(logctx, AV_LOG_ERROR,
163  "left block unavailable for requested intra4x4 mode %d\n",
164  status);
165  return AVERROR_INVALIDDATA;
166  } else if (status) {
167  pred_mode_cache[scan8[0] + 8 * i] = status;
168  }
169  }
170  }
171 
172  return 0;
173 }
174 
175 /**
176  * Check if the top & left blocks are available if needed and
177  * change the dc mode so it only uses the available blocks.
178  */
179 int ff_h264_check_intra_pred_mode(void *logctx, int top_samples_available,
180  int left_samples_available,
181  int mode, int is_chroma)
182 {
183  static const int8_t top[4] = { LEFT_DC_PRED8x8, 1, -1, -1 };
184  static const int8_t left[5] = { TOP_DC_PRED8x8, -1, 2, -1, DC_128_PRED8x8 };
185 
186  if (mode > 3U) {
187  av_log(logctx, AV_LOG_ERROR,
188  "out of range intra chroma pred mode\n");
189  return AVERROR_INVALIDDATA;
190  }
191 
192  if (!(top_samples_available & 0x8000)) {
193  mode = top[mode];
194  if (mode < 0) {
195  av_log(logctx, AV_LOG_ERROR,
196  "top block unavailable for requested intra mode\n");
197  return AVERROR_INVALIDDATA;
198  }
199  }
200 
201  if ((left_samples_available & 0x8080) != 0x8080) {
202  mode = left[mode];
203  if (mode < 0) {
204  av_log(logctx, AV_LOG_ERROR,
205  "left block unavailable for requested intra mode\n");
206  return AVERROR_INVALIDDATA;
207  }
208  if (is_chroma && (left_samples_available & 0x8080)) {
209  // mad cow disease mode, aka MBAFF + constrained_intra_pred
210  mode = ALZHEIMER_DC_L0T_PRED8x8 +
211  (!(left_samples_available & 0x8000)) +
212  2 * (mode == DC_128_PRED8x8);
213  }
214  }
215 
216  return mode;
217 }
218 
219 int ff_h264_parse_ref_count(int *plist_count, int ref_count[2],
220  GetBitContext *gb, const PPS *pps,
221  int slice_type_nos, int picture_structure, void *logctx)
222 {
223  int list_count;
224  int num_ref_idx_active_override_flag;
225 
226  // set defaults, might be overridden a few lines later
227  ref_count[0] = pps->ref_count[0];
228  ref_count[1] = pps->ref_count[1];
229 
230  if (slice_type_nos != AV_PICTURE_TYPE_I) {
231  unsigned max[2];
232  max[0] = max[1] = picture_structure == PICT_FRAME ? 15 : 31;
233 
234  num_ref_idx_active_override_flag = get_bits1(gb);
235 
236  if (num_ref_idx_active_override_flag) {
237  ref_count[0] = get_ue_golomb(gb) + 1;
238  if (slice_type_nos == AV_PICTURE_TYPE_B) {
239  ref_count[1] = get_ue_golomb(gb) + 1;
240  } else
241  // full range is spec-ok in this case, even for frames
242  ref_count[1] = 1;
243  }
244 
245  if (slice_type_nos == AV_PICTURE_TYPE_B)
246  list_count = 2;
247  else
248  list_count = 1;
249 
250  if (ref_count[0] - 1 > max[0] || (list_count == 2 && (ref_count[1] - 1 > max[1]))) {
251  av_log(logctx, AV_LOG_ERROR, "reference overflow %u > %u or %u > %u\n",
252  ref_count[0] - 1, max[0], ref_count[1] - 1, max[1]);
253  ref_count[0] = ref_count[1] = 0;
254  *plist_count = 0;
255  goto fail;
256  } else if (ref_count[1] - 1 > max[1]) {
257  av_log(logctx, AV_LOG_DEBUG, "reference overflow %u > %u \n",
258  ref_count[1] - 1, max[1]);
259  ref_count[1] = 0;
260  }
261 
262  } else {
263  list_count = 0;
264  ref_count[0] = ref_count[1] = 0;
265  }
266 
267  *plist_count = list_count;
268 
269  return 0;
270 fail:
271  *plist_count = 0;
272  ref_count[0] = 0;
273  ref_count[1] = 0;
274  return AVERROR_INVALIDDATA;
275 }
276 
277 int ff_h264_init_poc(int pic_field_poc[2], int *pic_poc,
278  const SPS *sps, H264POCContext *pc,
279  int picture_structure, int nal_ref_idc)
280 {
281  const int max_frame_num = 1 << sps->log2_max_frame_num;
282  int64_t field_poc[2];
283 
285  if (pc->frame_num < pc->prev_frame_num)
286  pc->frame_num_offset += max_frame_num;
287 
288  if (sps->poc_type == 0) {
289  const int max_poc_lsb = 1 << sps->log2_max_poc_lsb;
290  if (pc->prev_poc_lsb < 0)
291  pc->prev_poc_lsb = pc->poc_lsb;
292 
293  if (pc->poc_lsb < pc->prev_poc_lsb &&
294  pc->prev_poc_lsb - pc->poc_lsb >= max_poc_lsb / 2)
295  pc->poc_msb = pc->prev_poc_msb + max_poc_lsb;
296  else if (pc->poc_lsb > pc->prev_poc_lsb &&
297  pc->prev_poc_lsb - pc->poc_lsb < -max_poc_lsb / 2)
298  pc->poc_msb = pc->prev_poc_msb - max_poc_lsb;
299  else
300  pc->poc_msb = pc->prev_poc_msb;
301  field_poc[0] =
302  field_poc[1] = pc->poc_msb + pc->poc_lsb;
303  if (picture_structure == PICT_FRAME)
304  field_poc[1] += pc->delta_poc_bottom;
305  } else if (sps->poc_type == 1) {
306  int abs_frame_num;
307  int64_t expected_delta_per_poc_cycle, expectedpoc;
308  int i;
309 
310  if (sps->poc_cycle_length != 0)
311  abs_frame_num = pc->frame_num_offset + pc->frame_num;
312  else
313  abs_frame_num = 0;
314 
315  if (nal_ref_idc == 0 && abs_frame_num > 0)
316  abs_frame_num--;
317 
318  expected_delta_per_poc_cycle = 0;
319  for (i = 0; i < sps->poc_cycle_length; i++)
320  // FIXME integrate during sps parse
321  expected_delta_per_poc_cycle += sps->offset_for_ref_frame[i];
322 
323  if (abs_frame_num > 0) {
324  int poc_cycle_cnt = (abs_frame_num - 1) / sps->poc_cycle_length;
325  int frame_num_in_poc_cycle = (abs_frame_num - 1) % sps->poc_cycle_length;
326 
327  expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
328  for (i = 0; i <= frame_num_in_poc_cycle; i++)
329  expectedpoc = expectedpoc + sps->offset_for_ref_frame[i];
330  } else
331  expectedpoc = 0;
332 
333  if (nal_ref_idc == 0)
334  expectedpoc = expectedpoc + sps->offset_for_non_ref_pic;
335 
336  field_poc[0] = expectedpoc + pc->delta_poc[0];
337  field_poc[1] = field_poc[0] + sps->offset_for_top_to_bottom_field;
338 
339  if (picture_structure == PICT_FRAME)
340  field_poc[1] += pc->delta_poc[1];
341  } else {
342  int poc = 2 * (pc->frame_num_offset + pc->frame_num);
343 
344  if (!nal_ref_idc)
345  poc--;
346 
347  field_poc[0] = poc;
348  field_poc[1] = poc;
349  }
350 
351  if ( field_poc[0] != (int)field_poc[0]
352  || field_poc[1] != (int)field_poc[1])
353  return AVERROR_INVALIDDATA;
354 
355  if (picture_structure != PICT_BOTTOM_FIELD)
356  pic_field_poc[0] = field_poc[0];
357  if (picture_structure != PICT_TOP_FIELD)
358  pic_field_poc[1] = field_poc[1];
359  *pic_poc = FFMIN(pic_field_poc[0], pic_field_poc[1]);
360 
361  return 0;
362 }
363 
364 static int decode_extradata_ps(const uint8_t *data, int size, H264ParamSets *ps,
365  int is_avc, void *logctx)
366 {
367  H2645Packet pkt = { 0 };
368  int i, ret = 0;
369 
370  ret = ff_h2645_packet_split(&pkt, data, size, logctx, is_avc, 2, AV_CODEC_ID_H264, 1, 0);
371  if (ret < 0) {
372  ret = 0;
373  goto fail;
374  }
375 
376  for (i = 0; i < pkt.nb_nals; i++) {
377  H2645NAL *nal = &pkt.nals[i];
378  switch (nal->type) {
379  case H264_NAL_SPS: {
380  GetBitContext tmp_gb = nal->gb;
381  ret = ff_h264_decode_seq_parameter_set(&tmp_gb, logctx, ps, 0);
382  if (ret >= 0)
383  break;
384  av_log(logctx, AV_LOG_DEBUG,
385  "SPS decoding failure, trying again with the complete NAL\n");
386  init_get_bits8(&tmp_gb, nal->raw_data + 1, nal->raw_size - 1);
387  ret = ff_h264_decode_seq_parameter_set(&tmp_gb, logctx, ps, 0);
388  if (ret >= 0)
389  break;
390  ret = ff_h264_decode_seq_parameter_set(&nal->gb, logctx, ps, 1);
391  if (ret < 0)
392  goto fail;
393  break;
394  }
395  case H264_NAL_PPS:
396  ret = ff_h264_decode_picture_parameter_set(&nal->gb, logctx, ps,
397  nal->size_bits);
398  if (ret < 0)
399  goto fail;
400  break;
401  default:
402  av_log(logctx, AV_LOG_VERBOSE, "Ignoring NAL type %d in extradata\n",
403  nal->type);
404  break;
405  }
406  }
407 
408 fail:
410  return ret;
411 }
412 
413 /* There are (invalid) samples in the wild with mp4-style extradata, where the
414  * parameter sets are stored unescaped (i.e. as RBSP).
415  * This function catches the parameter set decoding failure and tries again
416  * after escaping it */
417 static int decode_extradata_ps_mp4(const uint8_t *buf, int buf_size, H264ParamSets *ps,
418  int err_recognition, void *logctx)
419 {
420  int ret;
421 
422  ret = decode_extradata_ps(buf, buf_size, ps, 1, logctx);
423  if (ret < 0 && !(err_recognition & AV_EF_EXPLODE)) {
424  GetByteContext gbc;
425  PutByteContext pbc;
426  uint8_t *escaped_buf;
427  int escaped_buf_size;
428 
429  av_log(logctx, AV_LOG_WARNING,
430  "SPS decoding failure, trying again after escaping the NAL\n");
431 
432  if (buf_size / 2 >= (INT16_MAX - AV_INPUT_BUFFER_PADDING_SIZE) / 3)
433  return AVERROR(ERANGE);
434  escaped_buf_size = buf_size * 3 / 2 + AV_INPUT_BUFFER_PADDING_SIZE;
435  escaped_buf = av_mallocz(escaped_buf_size);
436  if (!escaped_buf)
437  return AVERROR(ENOMEM);
438 
439  bytestream2_init(&gbc, buf, buf_size);
440  bytestream2_init_writer(&pbc, escaped_buf, escaped_buf_size);
441 
442  while (bytestream2_get_bytes_left(&gbc)) {
443  if (bytestream2_get_bytes_left(&gbc) >= 3 &&
444  bytestream2_peek_be24(&gbc) <= 3) {
445  bytestream2_put_be24(&pbc, 3);
446  bytestream2_skip(&gbc, 2);
447  } else
448  bytestream2_put_byte(&pbc, bytestream2_get_byte(&gbc));
449  }
450 
451  escaped_buf_size = bytestream2_tell_p(&pbc);
452  AV_WB16(escaped_buf, escaped_buf_size - 2);
453 
454  (void)decode_extradata_ps(escaped_buf, escaped_buf_size, ps, 1, logctx);
455  // lorex.mp4 decodes ok even with extradata decoding failing
456  av_freep(&escaped_buf);
457  }
458 
459  return 0;
460 }
461 
463  int *is_avc, int *nal_length_size,
464  int err_recognition, void *logctx)
465 {
466  int ret;
467 
468  if (!data || size <= 0)
469  return -1;
470 
471  if (data[0] == 1) {
472  int i, cnt, nalsize;
473  const uint8_t *p = data;
474 
475  *is_avc = 1;
476 
477  if (size < 7) {
478  av_log(logctx, AV_LOG_ERROR, "avcC %d too short\n", size);
479  return AVERROR_INVALIDDATA;
480  }
481 
482  // Decode sps from avcC
483  cnt = *(p + 5) & 0x1f; // Number of sps
484  p += 6;
485  for (i = 0; i < cnt; i++) {
486  nalsize = AV_RB16(p) + 2;
487  if (nalsize > size - (p - data))
488  return AVERROR_INVALIDDATA;
489  ret = decode_extradata_ps_mp4(p, nalsize, ps, err_recognition, logctx);
490  if (ret < 0) {
491  av_log(logctx, AV_LOG_ERROR,
492  "Decoding sps %d from avcC failed\n", i);
493  return ret;
494  }
495  p += nalsize;
496  }
497  // Decode pps from avcC
498  cnt = *(p++); // Number of pps
499  for (i = 0; i < cnt; i++) {
500  nalsize = AV_RB16(p) + 2;
501  if (nalsize > size - (p - data))
502  return AVERROR_INVALIDDATA;
503  ret = decode_extradata_ps_mp4(p, nalsize, ps, err_recognition, logctx);
504  if (ret < 0) {
505  av_log(logctx, AV_LOG_ERROR,
506  "Decoding pps %d from avcC failed\n", i);
507  return ret;
508  }
509  p += nalsize;
510  }
511  // Store right nal length size that will be used to parse all other nals
512  *nal_length_size = (data[4] & 0x03) + 1;
513  } else {
514  *is_avc = 0;
515  ret = decode_extradata_ps(data, size, ps, 0, logctx);
516  if (ret < 0)
517  return ret;
518  }
519  return size;
520 }
521 
522 /**
523  * Compute profile from profile_idc and constraint_set?_flags.
524  *
525  * @param sps SPS
526  *
527  * @return profile as defined by FF_PROFILE_H264_*
528  */
530 {
531  int profile = sps->profile_idc;
532 
533  switch (sps->profile_idc) {
535  // constraint_set1_flag set to 1
536  profile |= (sps->constraint_set_flags & 1 << 1) ? FF_PROFILE_H264_CONSTRAINED : 0;
537  break;
541  // constraint_set3_flag set to 1
542  profile |= (sps->constraint_set_flags & 1 << 3) ? FF_PROFILE_H264_INTRA : 0;
543  break;
544  }
545 
546  return profile;
547 }
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:749
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define DC_128_PRED8x8
Definition: h264pred.h:76
int size
static int get_se_golomb(GetBitContext *gb)
read signed exp golomb code.
Definition: golomb.h:239
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
int luma_weight_flag[2]
7.4.3.2 luma_weight_lX_flag
Definition: h264_parse.h:35
#define avpriv_request_sample(...)
static int decode_extradata_ps_mp4(const uint8_t *buf, int buf_size, H264ParamSets *ps, int err_recognition, void *logctx)
Definition: h264_parse.c:417
int chroma_weight[48][2][2][2]
Definition: h264_parse.h:39
Sequence parameter set.
Definition: h264_ps.h:44
#define FF_PROFILE_H264_INTRA
Definition: avcodec.h:1896
unsigned int ref_count[2]
num_ref_idx_l0/1_active_minus1 + 1
Definition: h264_ps.h:117
static av_always_inline void bytestream2_init_writer(PutByteContext *p, uint8_t *buf, int buf_size)
Definition: bytestream.h:143
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:277
Picture parameter set.
Definition: h264_ps.h:111
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:133
static AVPacket pkt
int profile_idc
Definition: h264_ps.h:46
int size_bits
Size, in bits, of just the data, excluding the stop bit and any trailing padding. ...
Definition: h2645_parse.h:42
#define FF_PROFILE_H264_HIGH_444_PREDICTIVE
Definition: avcodec.h:1910
#define FF_PROFILE_H264_BASELINE
Definition: avcodec.h:1898
uint8_t
int offset_for_non_ref_pic
Definition: h264_ps.h:54
int frame_num_offset
for POC type 2
Definition: h264_parse.h:51
int chroma_weight_flag[2]
7.4.3.2 chroma_weight_lX_flag
Definition: h264_parse.h:36
#define TOP_DC_PRED8x8
Definition: h264pred.h:75
int ff_h2645_packet_split(H2645Packet *pkt, const uint8_t *buf, int length, void *logctx, int is_nalff, int nal_length_size, enum AVCodecID codec_id, int small_padding, int use_ref)
Split an input packet into NAL units.
Definition: h2645_parse.c:392
void ff_h2645_packet_uninit(H2645Packet *pkt)
Free all the allocated memory in the packet.
Definition: h2645_parse.c:519
const char data[16]
Definition: mxf.c:91
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:462
#define PICT_BOTTOM_FIELD
Definition: mpegutils.h:38
bitstream reader API header.
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
int ff_h264_check_intra4x4_pred_mode(int8_t *pred_mode_cache, void *logctx, int top_samples_available, int left_samples_available)
Check if the top & left blocks are available if needed and change the dc mode so it only uses the ava...
Definition: h264_parse.c:131
static int decode_extradata_ps(const uint8_t *data, int size, H264ParamSets *ps, int is_avc, void *logctx)
Definition: h264_parse.c:364
#define max(a, b)
Definition: cuda_runtime.h:33
int luma_weight[48][2][2]
Definition: h264_parse.h:38
#define AV_WB16(p, v)
Definition: intreadwrite.h:405
#define av_log(a,...)
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:154
H.264 common definitions.
#define U(x)
Definition: vp56_arith.h:37
H.264 parameter set handling.
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
int chroma_log2_weight_denom
Definition: h264_parse.h:34
#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:55
int poc_type
pic_order_cnt_type
Definition: h264_ps.h:51
static const uint16_t mask[17]
Definition: lzw.c:38
int ff_h264_get_profile(const SPS *sps)
Compute profile from profile_idc and constraint_set?_flags.
Definition: h264_parse.c:529
#define AV_RB16
Definition: intreadwrite.h:53
#define AVERROR(e)
Definition: error.h:43
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:164
#define ALZHEIMER_DC_L0T_PRED8x8
Definition: h264pred.h:79
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
#define FF_PROFILE_H264_HIGH_422
Definition: avcodec.h:1906
#define PICT_TOP_FIELD
Definition: mpegutils.h:37
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
static av_always_inline int bytestream2_tell_p(PutByteContext *p)
Definition: bytestream.h:193
#define fail()
Definition: checkasm.h:123
int raw_size
Definition: h2645_parse.h:44
int offset_for_top_to_bottom_field
Definition: h264_ps.h:55
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
int prev_poc_msb
poc_msb of the last reference pic for POC type 0
Definition: h264_parse.h:49
#define FFMIN(a, b)
Definition: common.h:96
int poc_cycle_length
num_ref_frames_in_pic_order_cnt_cycle
Definition: h264_ps.h:56
H.264 / AVC / MPEG-4 part10 codec.
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:1666
#define LEFT_DC_PRED8x8
Definition: h264pred.h:74
int type
NAL unit type.
Definition: h2645_parse.h:52
typedef void(RENAME(mix_any_func_type))
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:677
static const uint8_t scan8[16 *3+3]
Definition: h264dec.h:650
int constraint_set_flags
constraint_set[0-3]_flag
Definition: h264_ps.h:103
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:498
int prev_frame_num
frame_num of the last pic for POC type 1/2
Definition: h264_parse.h:53
static int FUNC() pps(CodedBitstreamContext *ctx, RWContext *rw, H264RawPPS *current)
static int FUNC() sps(CodedBitstreamContext *ctx, RWContext *rw, H264RawSPS *current)
int log2_max_poc_lsb
log2_max_pic_order_cnt_lsb_minus4
Definition: h264_ps.h:52
mfxU16 profile
Definition: qsvenc.c:45
int prev_poc_lsb
poc_lsb of the last reference pic for POC type 0
Definition: h264_parse.h:50
int
if(ret< 0)
Definition: vf_mcdeint.c:279
int ff_h264_check_intra_pred_mode(void *logctx, int top_samples_available, int left_samples_available, int mode, int is_chroma)
Check if the top & left blocks are available if needed and change the dc mode so it only uses the ava...
Definition: h264_parse.c:179
int log2_max_frame_num
log2_max_frame_num_minus4 + 4
Definition: h264_ps.h:50
Bi-dir predicted.
Definition: avutil.h:276
GetBitContext gb
Definition: h2645_parse.h:47
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:215
int delta_poc[2]
Definition: h264_parse.h:47
const uint8_t * raw_data
Definition: h2645_parse.h:45
#define PICT_FRAME
Definition: mpegutils.h:39
int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int ignore_truncation)
Decode SPS.
Definition: h264_ps.c:333
H2645NAL * nals
Definition: h2645_parse.h:82
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
#define av_freep(p)
int prev_frame_num_offset
for POC type 2
Definition: h264_parse.h:52
int32_t offset_for_ref_frame[256]
Definition: h264_ps.h:86
#define FF_PROFILE_H264_CONSTRAINED
Definition: avcodec.h:1895
H.264 decoder/parser shared code.
#define FF_PROFILE_H264_HIGH_10
Definition: avcodec.h:1903
exp golomb vlc stuff
mode
Use these values in ebur128_init (or&#39;ed).
Definition: ebur128.h:83