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h264_parse.c
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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  goto out_range_weight;
87  if (pwt->chroma_weight[i][list][j][0] != chroma_def ||
88  pwt->chroma_weight[i][list][j][1] != 0) {
89  pwt->use_weight_chroma = 1;
90  pwt->chroma_weight_flag[list] = 1;
91  }
92  }
93  } else {
94  int j;
95  for (j = 0; j < 2; j++) {
96  pwt->chroma_weight[i][list][j][0] = chroma_def;
97  pwt->chroma_weight[i][list][j][1] = 0;
98  }
99  }
100  }
101 
102  // for MBAFF
103  if (picture_structure == PICT_FRAME) {
104  pwt->luma_weight[16 + 2 * i][list][0] = pwt->luma_weight[16 + 2 * i + 1][list][0] = pwt->luma_weight[i][list][0];
105  pwt->luma_weight[16 + 2 * i][list][1] = pwt->luma_weight[16 + 2 * i + 1][list][1] = pwt->luma_weight[i][list][1];
106  if (sps->chroma_format_idc) {
107  for (j = 0; j < 2; j++) {
108  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];
109  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];
110  }
111  }
112  }
113  }
114  if (slice_type_nos != AV_PICTURE_TYPE_B)
115  break;
116  }
117  pwt->use_weight = pwt->use_weight || pwt->use_weight_chroma;
118  return 0;
119 out_range_weight:
120  avpriv_request_sample(logctx, "Out of range weight\n");
121  return AVERROR_INVALIDDATA;
122 }
123 
124 /**
125  * Check if the top & left blocks are available if needed and
126  * change the dc mode so it only uses the available blocks.
127  */
128 int ff_h264_check_intra4x4_pred_mode(int8_t *pred_mode_cache, void *logctx,
129  int top_samples_available, int left_samples_available)
130 {
131  static const int8_t top[12] = {
132  -1, 0, LEFT_DC_PRED, -1, -1, -1, -1, -1, 0
133  };
134  static const int8_t left[12] = {
135  0, -1, TOP_DC_PRED, 0, -1, -1, -1, 0, -1, DC_128_PRED
136  };
137  int i;
138 
139  if (!(top_samples_available & 0x8000)) {
140  for (i = 0; i < 4; i++) {
141  int status = top[pred_mode_cache[scan8[0] + i]];
142  if (status < 0) {
143  av_log(logctx, AV_LOG_ERROR,
144  "top block unavailable for requested intra mode %d\n",
145  status);
146  return AVERROR_INVALIDDATA;
147  } else if (status) {
148  pred_mode_cache[scan8[0] + i] = status;
149  }
150  }
151  }
152 
153  if ((left_samples_available & 0x8888) != 0x8888) {
154  static const int mask[4] = { 0x8000, 0x2000, 0x80, 0x20 };
155  for (i = 0; i < 4; i++)
156  if (!(left_samples_available & mask[i])) {
157  int status = left[pred_mode_cache[scan8[0] + 8 * i]];
158  if (status < 0) {
159  av_log(logctx, AV_LOG_ERROR,
160  "left block unavailable for requested intra4x4 mode %d\n",
161  status);
162  return AVERROR_INVALIDDATA;
163  } else if (status) {
164  pred_mode_cache[scan8[0] + 8 * i] = status;
165  }
166  }
167  }
168 
169  return 0;
170 }
171 
172 /**
173  * Check if the top & left blocks are available if needed and
174  * change the dc mode so it only uses the available blocks.
175  */
176 int ff_h264_check_intra_pred_mode(void *logctx, int top_samples_available,
177  int left_samples_available,
178  int mode, int is_chroma)
179 {
180  static const int8_t top[4] = { LEFT_DC_PRED8x8, 1, -1, -1 };
181  static const int8_t left[5] = { TOP_DC_PRED8x8, -1, 2, -1, DC_128_PRED8x8 };
182 
183  if (mode > 3U) {
184  av_log(logctx, AV_LOG_ERROR,
185  "out of range intra chroma pred mode\n");
186  return AVERROR_INVALIDDATA;
187  }
188 
189  if (!(top_samples_available & 0x8000)) {
190  mode = top[mode];
191  if (mode < 0) {
192  av_log(logctx, AV_LOG_ERROR,
193  "top block unavailable for requested intra mode\n");
194  return AVERROR_INVALIDDATA;
195  }
196  }
197 
198  if ((left_samples_available & 0x8080) != 0x8080) {
199  mode = left[mode];
200  if (mode < 0) {
201  av_log(logctx, AV_LOG_ERROR,
202  "left block unavailable for requested intra mode\n");
203  return AVERROR_INVALIDDATA;
204  }
205  if (is_chroma && (left_samples_available & 0x8080)) {
206  // mad cow disease mode, aka MBAFF + constrained_intra_pred
207  mode = ALZHEIMER_DC_L0T_PRED8x8 +
208  (!(left_samples_available & 0x8000)) +
209  2 * (mode == DC_128_PRED8x8);
210  }
211  }
212 
213  return mode;
214 }
215 
216 int ff_h264_parse_ref_count(int *plist_count, int ref_count[2],
217  GetBitContext *gb, const PPS *pps,
218  int slice_type_nos, int picture_structure, void *logctx)
219 {
220  int list_count;
221  int num_ref_idx_active_override_flag;
222 
223  // set defaults, might be overridden a few lines later
224  ref_count[0] = pps->ref_count[0];
225  ref_count[1] = pps->ref_count[1];
226 
227  if (slice_type_nos != AV_PICTURE_TYPE_I) {
228  unsigned max[2];
229  max[0] = max[1] = picture_structure == PICT_FRAME ? 15 : 31;
230 
231  num_ref_idx_active_override_flag = get_bits1(gb);
232 
233  if (num_ref_idx_active_override_flag) {
234  ref_count[0] = get_ue_golomb(gb) + 1;
235  if (slice_type_nos == AV_PICTURE_TYPE_B) {
236  ref_count[1] = get_ue_golomb(gb) + 1;
237  } else
238  // full range is spec-ok in this case, even for frames
239  ref_count[1] = 1;
240  }
241 
242  if (ref_count[0] - 1 > max[0] || ref_count[1] - 1 > max[1]) {
243  av_log(logctx, AV_LOG_ERROR, "reference overflow %u > %u or %u > %u\n",
244  ref_count[0] - 1, max[0], ref_count[1] - 1, max[1]);
245  ref_count[0] = ref_count[1] = 0;
246  *plist_count = 0;
247  goto fail;
248  }
249 
250  if (slice_type_nos == AV_PICTURE_TYPE_B)
251  list_count = 2;
252  else
253  list_count = 1;
254  } else {
255  list_count = 0;
256  ref_count[0] = ref_count[1] = 0;
257  }
258 
259  *plist_count = list_count;
260 
261  return 0;
262 fail:
263  *plist_count = 0;
264  ref_count[0] = 0;
265  ref_count[1] = 0;
266  return AVERROR_INVALIDDATA;
267 }
268 
269 int ff_h264_init_poc(int pic_field_poc[2], int *pic_poc,
270  const SPS *sps, H264POCContext *pc,
271  int picture_structure, int nal_ref_idc)
272 {
273  const int max_frame_num = 1 << sps->log2_max_frame_num;
274  int field_poc[2];
275 
277  if (pc->frame_num < pc->prev_frame_num)
278  pc->frame_num_offset += max_frame_num;
279 
280  if (sps->poc_type == 0) {
281  const int max_poc_lsb = 1 << sps->log2_max_poc_lsb;
282 
283  if (pc->poc_lsb < pc->prev_poc_lsb &&
284  pc->prev_poc_lsb - pc->poc_lsb >= max_poc_lsb / 2)
285  pc->poc_msb = pc->prev_poc_msb + max_poc_lsb;
286  else if (pc->poc_lsb > pc->prev_poc_lsb &&
287  pc->prev_poc_lsb - pc->poc_lsb < -max_poc_lsb / 2)
288  pc->poc_msb = pc->prev_poc_msb - max_poc_lsb;
289  else
290  pc->poc_msb = pc->prev_poc_msb;
291  field_poc[0] =
292  field_poc[1] = pc->poc_msb + pc->poc_lsb;
293  if (picture_structure == PICT_FRAME)
294  field_poc[1] += pc->delta_poc_bottom;
295  } else if (sps->poc_type == 1) {
296  int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
297  int i;
298 
299  if (sps->poc_cycle_length != 0)
300  abs_frame_num = pc->frame_num_offset + pc->frame_num;
301  else
302  abs_frame_num = 0;
303 
304  if (nal_ref_idc == 0 && abs_frame_num > 0)
305  abs_frame_num--;
306 
307  expected_delta_per_poc_cycle = 0;
308  for (i = 0; i < sps->poc_cycle_length; i++)
309  // FIXME integrate during sps parse
310  expected_delta_per_poc_cycle += sps->offset_for_ref_frame[i];
311 
312  if (abs_frame_num > 0) {
313  int poc_cycle_cnt = (abs_frame_num - 1) / sps->poc_cycle_length;
314  int frame_num_in_poc_cycle = (abs_frame_num - 1) % sps->poc_cycle_length;
315 
316  expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
317  for (i = 0; i <= frame_num_in_poc_cycle; i++)
318  expectedpoc = expectedpoc + sps->offset_for_ref_frame[i];
319  } else
320  expectedpoc = 0;
321 
322  if (nal_ref_idc == 0)
323  expectedpoc = expectedpoc + sps->offset_for_non_ref_pic;
324 
325  field_poc[0] = expectedpoc + pc->delta_poc[0];
326  field_poc[1] = field_poc[0] + sps->offset_for_top_to_bottom_field;
327 
328  if (picture_structure == PICT_FRAME)
329  field_poc[1] += pc->delta_poc[1];
330  } else {
331  int poc = 2 * (pc->frame_num_offset + pc->frame_num);
332 
333  if (!nal_ref_idc)
334  poc--;
335 
336  field_poc[0] = poc;
337  field_poc[1] = poc;
338  }
339 
340  if (picture_structure != PICT_BOTTOM_FIELD)
341  pic_field_poc[0] = field_poc[0];
342  if (picture_structure != PICT_TOP_FIELD)
343  pic_field_poc[1] = field_poc[1];
344  *pic_poc = FFMIN(pic_field_poc[0], pic_field_poc[1]);
345 
346  return 0;
347 }
348 
349 static int decode_extradata_ps(const uint8_t *data, int size, H264ParamSets *ps,
350  int is_avc, void *logctx)
351 {
352  H2645Packet pkt = { 0 };
353  int i, ret = 0;
354 
355  ret = ff_h2645_packet_split(&pkt, data, size, logctx, is_avc, 2, AV_CODEC_ID_H264, 1);
356  if (ret < 0) {
357  ret = 0;
358  goto fail;
359  }
360 
361  for (i = 0; i < pkt.nb_nals; i++) {
362  H2645NAL *nal = &pkt.nals[i];
363  switch (nal->type) {
364  case H264_NAL_SPS:
365  ret = ff_h264_decode_seq_parameter_set(&nal->gb, logctx, ps, 0);
366  if (ret < 0)
367  goto fail;
368  break;
369  case H264_NAL_PPS:
370  ret = ff_h264_decode_picture_parameter_set(&nal->gb, logctx, ps,
371  nal->size_bits);
372  if (ret < 0)
373  goto fail;
374  break;
375  default:
376  av_log(logctx, AV_LOG_VERBOSE, "Ignoring NAL type %d in extradata\n",
377  nal->type);
378  break;
379  }
380  }
381 
382 fail:
384  return ret;
385 }
386 
387 /* There are (invalid) samples in the wild with mp4-style extradata, where the
388  * parameter sets are stored unescaped (i.e. as RBSP).
389  * This function catches the parameter set decoding failure and tries again
390  * after escaping it */
391 static int decode_extradata_ps_mp4(const uint8_t *buf, int buf_size, H264ParamSets *ps,
392  int err_recognition, void *logctx)
393 {
394  int ret;
395 
396  ret = decode_extradata_ps(buf, buf_size, ps, 1, logctx);
397  if (ret < 0 && !(err_recognition & AV_EF_EXPLODE)) {
398  GetByteContext gbc;
399  PutByteContext pbc;
400  uint8_t *escaped_buf;
401  int escaped_buf_size;
402 
403  av_log(logctx, AV_LOG_WARNING,
404  "SPS decoding failure, trying again after escaping the NAL\n");
405 
406  if (buf_size / 2 >= (INT16_MAX - AV_INPUT_BUFFER_PADDING_SIZE) / 3)
407  return AVERROR(ERANGE);
408  escaped_buf_size = buf_size * 3 / 2 + AV_INPUT_BUFFER_PADDING_SIZE;
409  escaped_buf = av_mallocz(escaped_buf_size);
410  if (!escaped_buf)
411  return AVERROR(ENOMEM);
412 
413  bytestream2_init(&gbc, buf, buf_size);
414  bytestream2_init_writer(&pbc, escaped_buf, escaped_buf_size);
415 
416  while (bytestream2_get_bytes_left(&gbc)) {
417  if (bytestream2_get_bytes_left(&gbc) >= 3 &&
418  bytestream2_peek_be24(&gbc) <= 3) {
419  bytestream2_put_be24(&pbc, 3);
420  bytestream2_skip(&gbc, 2);
421  } else
422  bytestream2_put_byte(&pbc, bytestream2_get_byte(&gbc));
423  }
424 
425  escaped_buf_size = bytestream2_tell_p(&pbc);
426  AV_WB16(escaped_buf, escaped_buf_size - 2);
427 
428  (void)decode_extradata_ps(escaped_buf, escaped_buf_size, ps, 1, logctx);
429  // lorex.mp4 decodes ok even with extradata decoding failing
430  av_freep(&escaped_buf);
431  }
432 
433  return 0;
434 }
435 
437  int *is_avc, int *nal_length_size,
438  int err_recognition, void *logctx)
439 {
440  int ret;
441 
442  if (!data || size <= 0)
443  return -1;
444 
445  if (data[0] == 1) {
446  int i, cnt, nalsize;
447  const uint8_t *p = data;
448 
449  *is_avc = 1;
450 
451  if (size < 7) {
452  av_log(logctx, AV_LOG_ERROR, "avcC %d too short\n", size);
453  return AVERROR_INVALIDDATA;
454  }
455 
456  // Decode sps from avcC
457  cnt = *(p + 5) & 0x1f; // Number of sps
458  p += 6;
459  for (i = 0; i < cnt; i++) {
460  nalsize = AV_RB16(p) + 2;
461  if (nalsize > size - (p - data))
462  return AVERROR_INVALIDDATA;
463  ret = decode_extradata_ps_mp4(p, nalsize, ps, err_recognition, logctx);
464  if (ret < 0) {
465  av_log(logctx, AV_LOG_ERROR,
466  "Decoding sps %d from avcC failed\n", i);
467  return ret;
468  }
469  p += nalsize;
470  }
471  // Decode pps from avcC
472  cnt = *(p++); // Number of pps
473  for (i = 0; i < cnt; i++) {
474  nalsize = AV_RB16(p) + 2;
475  if (nalsize > size - (p - data))
476  return AVERROR_INVALIDDATA;
477  ret = decode_extradata_ps_mp4(p, nalsize, ps, err_recognition, logctx);
478  if (ret < 0) {
479  av_log(logctx, AV_LOG_ERROR,
480  "Decoding pps %d from avcC failed\n", i);
481  return ret;
482  }
483  p += nalsize;
484  }
485  // Store right nal length size that will be used to parse all other nals
486  *nal_length_size = (data[4] & 0x03) + 1;
487  } else {
488  *is_avc = 0;
489  ret = decode_extradata_ps(data, size, ps, 0, logctx);
490  if (ret < 0)
491  return ret;
492  }
493  return size;
494 }
495 
496 /**
497  * Compute profile from profile_idc and constraint_set?_flags.
498  *
499  * @param sps SPS
500  *
501  * @return profile as defined by FF_PROFILE_H264_*
502  */
504 {
505  int profile = sps->profile_idc;
506 
507  switch (sps->profile_idc) {
509  // constraint_set1_flag set to 1
510  profile |= (sps->constraint_set_flags & 1 << 1) ? FF_PROFILE_H264_CONSTRAINED : 0;
511  break;
515  // constraint_set3_flag set to 1
516  profile |= (sps->constraint_set_flags & 1 << 3) ? FF_PROFILE_H264_INTRA : 0;
517  break;
518  }
519 
520  return profile;
521 }
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
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)
Split an input packet into NAL units.
Definition: h2645_parse.c:263
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define DC_128_PRED8x8
Definition: h264pred.h:76
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
static int get_se_golomb(GetBitContext *gb)
read signed exp golomb code.
Definition: golomb.h:183
#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
static int decode_extradata_ps_mp4(const uint8_t *buf, int buf_size, H264ParamSets *ps, int err_recognition, void *logctx)
Definition: h264_parse.c:391
int chroma_weight[48][2][2][2]
Definition: h264_parse.h:39
Sequence parameter set.
Definition: h264_ps.h:43
#define FF_PROFILE_H264_INTRA
Definition: avcodec.h:2850
unsigned int ref_count[2]
num_ref_idx_l0/1_active_minus1 + 1
Definition: h264_ps.h:114
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:269
Picture parameter set.
Definition: h264_ps.h:108
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:133
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
static AVPacket pkt
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:87
int profile_idc
Definition: h264_ps.h:45
int size_bits
Size, in bits, of just the data, excluding the stop bit and any trailing padding. ...
Definition: h2645_parse.h:41
#define FF_PROFILE_H264_HIGH_444_PREDICTIVE
Definition: avcodec.h:2864
#define FF_PROFILE_H264_BASELINE
Definition: avcodec.h:2852
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
uint8_t
int offset_for_non_ref_pic
Definition: h264_ps.h:53
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
void ff_h2645_packet_uninit(H2645Packet *pkt)
Free all the allocated memory in the packet.
Definition: h2645_parse.c:386
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:436
#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:128
static int decode_extradata_ps(const uint8_t *data, int size, H264ParamSets *ps, int is_avc, void *logctx)
Definition: h264_parse.c:349
ptrdiff_t size
Definition: opengl_enc.c:101
int luma_weight[48][2][2]
Definition: h264_parse.h:38
#define AV_WB16(p, v)
Definition: intreadwrite.h:405
#define av_log(a,...)
H.264 common definitions.
#define U(x)
Definition: vp56_arith.h:37
H.264 parameter set handling.
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:53
int poc_type
pic_order_cnt_type
Definition: h264_ps.h:50
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:503
#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
static av_always_inline unsigned int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:154
#define FF_PROFILE_H264_HIGH_422
Definition: avcodec.h:2860
#define PICT_TOP_FIELD
Definition: mpegutils.h:37
static av_always_inline int bytestream2_tell_p(PutByteContext *p)
Definition: bytestream.h:193
#define fail()
Definition: checkasm.h:113
int offset_for_top_to_bottom_field
Definition: h264_ps.h:54
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:216
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:55
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
H.264 / AVC / MPEG-4 part10 codec.
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2623
#define LEFT_DC_PRED8x8
Definition: h264pred.h:74
int type
NAL unit type.
Definition: h2645_parse.h:51
short offset_for_ref_frame[256]
Definition: h264_ps.h:83
int delta_poc_bottom
Definition: h264_parse.h:46
void * buf
Definition: avisynth_c.h:690
static const uint8_t scan8[16 *3+3]
Definition: h264dec.h:644
int constraint_set_flags
constraint_set[0-3]_flag
Definition: h264_ps.h:100
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:313
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:51
mfxU16 profile
Definition: qsvenc.c:44
int prev_poc_lsb
poc_lsb of the last reference pic for POC type 0
Definition: h264_parse.h:50
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:176
int log2_max_frame_num
log2_max_frame_num_minus4 + 4
Definition: h264_ps.h:49
Bi-dir predicted.
Definition: avutil.h:276
GetBitContext gb
Definition: h2645_parse.h:46
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:770
int delta_poc[2]
Definition: h264_parse.h:47
#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:334
H2645NAL * nals
Definition: h2645_parse.h:75
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
#define FF_PROFILE_H264_CONSTRAINED
Definition: avcodec.h:2849
H.264 decoder/parser shared code.
#define FF_PROFILE_H264_HIGH_10
Definition: avcodec.h:2857
exp golomb vlc stuff
mode
Use these values in ebur128_init (or'ed).
Definition: ebur128.h:83