FFmpeg  4.2.2
cbs_h2645.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 "libavutil/attributes.h"
20 #include "libavutil/avassert.h"
21 
22 #include "bytestream.h"
23 #include "cbs.h"
24 #include "cbs_internal.h"
25 #include "cbs_h264.h"
26 #include "cbs_h265.h"
27 #include "h264.h"
28 #include "h264_sei.h"
29 #include "h2645_parse.h"
30 #include "hevc.h"
31 #include "hevc_sei.h"
32 
33 
35  const char *name, const int *subscripts,
36  uint32_t *write_to,
37  uint32_t range_min, uint32_t range_max)
38 {
39  uint32_t value;
40  int position, i, j;
41  unsigned int k;
42  char bits[65];
43 
44  position = get_bits_count(gbc);
45 
46  for (i = 0; i < 32; i++) {
47  if (get_bits_left(gbc) < i + 1) {
48  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid ue-golomb code at "
49  "%s: bitstream ended.\n", name);
50  return AVERROR_INVALIDDATA;
51  }
52  k = get_bits1(gbc);
53  bits[i] = k ? '1' : '0';
54  if (k)
55  break;
56  }
57  if (i >= 32) {
58  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid ue-golomb code at "
59  "%s: more than 31 zeroes.\n", name);
60  return AVERROR_INVALIDDATA;
61  }
62  value = 1;
63  for (j = 0; j < i; j++) {
64  k = get_bits1(gbc);
65  bits[i + j + 1] = k ? '1' : '0';
66  value = value << 1 | k;
67  }
68  bits[i + j + 1] = 0;
69  --value;
70 
71  if (ctx->trace_enable)
72  ff_cbs_trace_syntax_element(ctx, position, name, subscripts,
73  bits, value);
74 
75  if (value < range_min || value > range_max) {
76  av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
77  "%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
78  name, value, range_min, range_max);
79  return AVERROR_INVALIDDATA;
80  }
81 
82  *write_to = value;
83  return 0;
84 }
85 
87  const char *name, const int *subscripts,
88  int32_t *write_to,
89  int32_t range_min, int32_t range_max)
90 {
91  int32_t value;
92  int position, i, j;
93  unsigned int k;
94  uint32_t v;
95  char bits[65];
96 
97  position = get_bits_count(gbc);
98 
99  for (i = 0; i < 32; i++) {
100  if (get_bits_left(gbc) < i + 1) {
101  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid se-golomb code at "
102  "%s: bitstream ended.\n", name);
103  return AVERROR_INVALIDDATA;
104  }
105  k = get_bits1(gbc);
106  bits[i] = k ? '1' : '0';
107  if (k)
108  break;
109  }
110  if (i >= 32) {
111  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid se-golomb code at "
112  "%s: more than 31 zeroes.\n", name);
113  return AVERROR_INVALIDDATA;
114  }
115  v = 1;
116  for (j = 0; j < i; j++) {
117  k = get_bits1(gbc);
118  bits[i + j + 1] = k ? '1' : '0';
119  v = v << 1 | k;
120  }
121  bits[i + j + 1] = 0;
122  if (v & 1)
123  value = -(int32_t)(v / 2);
124  else
125  value = v / 2;
126 
127  if (ctx->trace_enable)
128  ff_cbs_trace_syntax_element(ctx, position, name, subscripts,
129  bits, value);
130 
131  if (value < range_min || value > range_max) {
132  av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
133  "%"PRId32", but must be in [%"PRId32",%"PRId32"].\n",
134  name, value, range_min, range_max);
135  return AVERROR_INVALIDDATA;
136  }
137 
138  *write_to = value;
139  return 0;
140 }
141 
143  const char *name, const int *subscripts,
144  uint32_t value,
145  uint32_t range_min, uint32_t range_max)
146 {
147  int len;
148 
149  if (value < range_min || value > range_max) {
150  av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
151  "%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
152  name, value, range_min, range_max);
153  return AVERROR_INVALIDDATA;
154  }
155  av_assert0(value != UINT32_MAX);
156 
157  len = av_log2(value + 1);
158  if (put_bits_left(pbc) < 2 * len + 1)
159  return AVERROR(ENOSPC);
160 
161  if (ctx->trace_enable) {
162  char bits[65];
163  int i;
164 
165  for (i = 0; i < len; i++)
166  bits[i] = '0';
167  bits[len] = '1';
168  for (i = 0; i < len; i++)
169  bits[len + i + 1] = (value + 1) >> (len - i - 1) & 1 ? '1' : '0';
170  bits[len + len + 1] = 0;
171 
173  name, subscripts, bits, value);
174  }
175 
176  put_bits(pbc, len, 0);
177  if (len + 1 < 32)
178  put_bits(pbc, len + 1, value + 1);
179  else
180  put_bits32(pbc, value + 1);
181 
182  return 0;
183 }
184 
186  const char *name, const int *subscripts,
187  int32_t value,
188  int32_t range_min, int32_t range_max)
189 {
190  int len;
191  uint32_t uvalue;
192 
193  if (value < range_min || value > range_max) {
194  av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
195  "%"PRId32", but must be in [%"PRId32",%"PRId32"].\n",
196  name, value, range_min, range_max);
197  return AVERROR_INVALIDDATA;
198  }
199  av_assert0(value != INT32_MIN);
200 
201  if (value == 0)
202  uvalue = 0;
203  else if (value > 0)
204  uvalue = 2 * (uint32_t)value - 1;
205  else
206  uvalue = 2 * (uint32_t)-value;
207 
208  len = av_log2(uvalue + 1);
209  if (put_bits_left(pbc) < 2 * len + 1)
210  return AVERROR(ENOSPC);
211 
212  if (ctx->trace_enable) {
213  char bits[65];
214  int i;
215 
216  for (i = 0; i < len; i++)
217  bits[i] = '0';
218  bits[len] = '1';
219  for (i = 0; i < len; i++)
220  bits[len + i + 1] = (uvalue + 1) >> (len - i - 1) & 1 ? '1' : '0';
221  bits[len + len + 1] = 0;
222 
224  name, subscripts, bits, value);
225  }
226 
227  put_bits(pbc, len, 0);
228  if (len + 1 < 32)
229  put_bits(pbc, len + 1, uvalue + 1);
230  else
231  put_bits32(pbc, uvalue + 1);
232 
233  return 0;
234 }
235 
236 #define HEADER(name) do { \
237  ff_cbs_trace_header(ctx, name); \
238  } while (0)
239 
240 #define CHECK(call) do { \
241  err = (call); \
242  if (err < 0) \
243  return err; \
244  } while (0)
245 
246 #define FUNC_NAME(rw, codec, name) cbs_ ## codec ## _ ## rw ## _ ## name
247 #define FUNC_H264(rw, name) FUNC_NAME(rw, h264, name)
248 #define FUNC_H265(rw, name) FUNC_NAME(rw, h265, name)
249 
250 #define SUBSCRIPTS(subs, ...) (subs > 0 ? ((int[subs + 1]){ subs, __VA_ARGS__ }) : NULL)
251 
252 #define u(width, name, range_min, range_max) \
253  xu(width, name, current->name, range_min, range_max, 0)
254 #define ub(width, name) \
255  xu(width, name, current->name, 0, MAX_UINT_BITS(width), 0)
256 #define flag(name) ub(1, name)
257 #define ue(name, range_min, range_max) \
258  xue(name, current->name, range_min, range_max, 0)
259 #define i(width, name, range_min, range_max) \
260  xi(width, name, current->name, range_min, range_max, 0)
261 #define ib(width, name) \
262  xi(width, name, current->name, MIN_INT_BITS(width), MAX_INT_BITS(width), 0)
263 #define se(name, range_min, range_max) \
264  xse(name, current->name, range_min, range_max, 0)
265 
266 #define us(width, name, range_min, range_max, subs, ...) \
267  xu(width, name, current->name, range_min, range_max, subs, __VA_ARGS__)
268 #define ubs(width, name, subs, ...) \
269  xu(width, name, current->name, 0, MAX_UINT_BITS(width), subs, __VA_ARGS__)
270 #define flags(name, subs, ...) \
271  xu(1, name, current->name, 0, 1, subs, __VA_ARGS__)
272 #define ues(name, range_min, range_max, subs, ...) \
273  xue(name, current->name, range_min, range_max, subs, __VA_ARGS__)
274 #define is(width, name, range_min, range_max, subs, ...) \
275  xi(width, name, current->name, range_min, range_max, subs, __VA_ARGS__)
276 #define ibs(width, name, subs, ...) \
277  xi(width, name, current->name, MIN_INT_BITS(width), MAX_INT_BITS(width), subs, __VA_ARGS__)
278 #define ses(name, range_min, range_max, subs, ...) \
279  xse(name, current->name, range_min, range_max, subs, __VA_ARGS__)
280 
281 #define fixed(width, name, value) do { \
282  av_unused uint32_t fixed_value = value; \
283  xu(width, name, fixed_value, value, value, 0); \
284  } while (0)
285 
286 
287 #define READ
288 #define READWRITE read
289 #define RWContext GetBitContext
290 
291 #define xu(width, name, var, range_min, range_max, subs, ...) do { \
292  uint32_t value; \
293  CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \
294  SUBSCRIPTS(subs, __VA_ARGS__), \
295  &value, range_min, range_max)); \
296  var = value; \
297  } while (0)
298 #define xue(name, var, range_min, range_max, subs, ...) do { \
299  uint32_t value; \
300  CHECK(cbs_read_ue_golomb(ctx, rw, #name, \
301  SUBSCRIPTS(subs, __VA_ARGS__), \
302  &value, range_min, range_max)); \
303  var = value; \
304  } while (0)
305 #define xi(width, name, var, range_min, range_max, subs, ...) do { \
306  int32_t value; \
307  CHECK(ff_cbs_read_signed(ctx, rw, width, #name, \
308  SUBSCRIPTS(subs, __VA_ARGS__), \
309  &value, range_min, range_max)); \
310  var = value; \
311  } while (0)
312 #define xse(name, var, range_min, range_max, subs, ...) do { \
313  int32_t value; \
314  CHECK(cbs_read_se_golomb(ctx, rw, #name, \
315  SUBSCRIPTS(subs, __VA_ARGS__), \
316  &value, range_min, range_max)); \
317  var = value; \
318  } while (0)
319 
320 
321 #define infer(name, value) do { \
322  current->name = value; \
323  } while (0)
324 
326 {
327  int bits_left = get_bits_left(gbc);
328  if (bits_left > 8)
329  return 1;
330  if (bits_left == 0)
331  return 0;
332  if (show_bits(gbc, bits_left) & MAX_UINT_BITS(bits_left - 1))
333  return 1;
334  return 0;
335 }
336 
337 #define more_rbsp_data(var) ((var) = cbs_h2645_read_more_rbsp_data(rw))
338 
339 #define byte_alignment(rw) (get_bits_count(rw) % 8)
340 
341 #define allocate(name, size) do { \
342  name ## _ref = av_buffer_allocz(size + \
343  AV_INPUT_BUFFER_PADDING_SIZE); \
344  if (!name ## _ref) \
345  return AVERROR(ENOMEM); \
346  name = name ## _ref->data; \
347  } while (0)
348 
349 #define FUNC(name) FUNC_H264(READWRITE, name)
351 #undef FUNC
352 
353 #define FUNC(name) FUNC_H265(READWRITE, name)
355 #undef FUNC
356 
357 #undef READ
358 #undef READWRITE
359 #undef RWContext
360 #undef xu
361 #undef xi
362 #undef xue
363 #undef xse
364 #undef infer
365 #undef more_rbsp_data
366 #undef byte_alignment
367 #undef allocate
368 
369 
370 #define WRITE
371 #define READWRITE write
372 #define RWContext PutBitContext
373 
374 #define xu(width, name, var, range_min, range_max, subs, ...) do { \
375  uint32_t value = var; \
376  CHECK(ff_cbs_write_unsigned(ctx, rw, width, #name, \
377  SUBSCRIPTS(subs, __VA_ARGS__), \
378  value, range_min, range_max)); \
379  } while (0)
380 #define xue(name, var, range_min, range_max, subs, ...) do { \
381  uint32_t value = var; \
382  CHECK(cbs_write_ue_golomb(ctx, rw, #name, \
383  SUBSCRIPTS(subs, __VA_ARGS__), \
384  value, range_min, range_max)); \
385  } while (0)
386 #define xi(width, name, var, range_min, range_max, subs, ...) do { \
387  int32_t value = var; \
388  CHECK(ff_cbs_write_signed(ctx, rw, width, #name, \
389  SUBSCRIPTS(subs, __VA_ARGS__), \
390  value, range_min, range_max)); \
391  } while (0)
392 #define xse(name, var, range_min, range_max, subs, ...) do { \
393  int32_t value = var; \
394  CHECK(cbs_write_se_golomb(ctx, rw, #name, \
395  SUBSCRIPTS(subs, __VA_ARGS__), \
396  value, range_min, range_max)); \
397  } while (0)
398 
399 #define infer(name, value) do { \
400  if (current->name != (value)) { \
401  av_log(ctx->log_ctx, AV_LOG_WARNING, "Warning: " \
402  "%s does not match inferred value: " \
403  "%"PRId64", but should be %"PRId64".\n", \
404  #name, (int64_t)current->name, (int64_t)(value)); \
405  } \
406  } while (0)
407 
408 #define more_rbsp_data(var) (var)
409 
410 #define byte_alignment(rw) (put_bits_count(rw) % 8)
411 
412 #define allocate(name, size) do { \
413  if (!name) { \
414  av_log(ctx->log_ctx, AV_LOG_ERROR, "%s must be set " \
415  "for writing.\n", #name); \
416  return AVERROR_INVALIDDATA; \
417  } \
418  } while (0)
419 
420 #define FUNC(name) FUNC_H264(READWRITE, name)
422 #undef FUNC
423 
424 #define FUNC(name) FUNC_H265(READWRITE, name)
426 #undef FUNC
427 
428 #undef WRITE
429 #undef READWRITE
430 #undef RWContext
431 #undef xu
432 #undef xi
433 #undef xue
434 #undef xse
435 #undef u
436 #undef i
437 #undef flag
438 #undef ue
439 #undef se
440 #undef infer
441 #undef more_rbsp_data
442 #undef byte_alignment
443 #undef allocate
444 
445 
446 static void cbs_h264_free_pps(void *unit, uint8_t *content)
447 {
448  H264RawPPS *pps = (H264RawPPS*)content;
450  av_freep(&content);
451 }
452 
454 {
455  switch (payload->payload_type) {
463  break;
466  break;
469  break;
470  default:
471  av_buffer_unref(&payload->payload.other.data_ref);
472  break;
473  }
474 }
475 
476 static void cbs_h264_free_sei(void *unit, uint8_t *content)
477 {
478  H264RawSEI *sei = (H264RawSEI*)content;
479  int i;
480  for (i = 0; i < sei->payload_count; i++)
482  av_freep(&content);
483 }
484 
485 static void cbs_h264_free_slice(void *unit, uint8_t *content)
486 {
487  H264RawSlice *slice = (H264RawSlice*)content;
488  av_buffer_unref(&slice->data_ref);
489  av_freep(&content);
490 }
491 
492 static void cbs_h265_free_vps(void *unit, uint8_t *content)
493 {
494  H265RawVPS *vps = (H265RawVPS*)content;
496  av_freep(&content);
497 }
498 
499 static void cbs_h265_free_sps(void *unit, uint8_t *content)
500 {
501  H265RawSPS *sps = (H265RawSPS*)content;
503  av_freep(&content);
504 }
505 
506 static void cbs_h265_free_pps(void *unit, uint8_t *content)
507 {
508  H265RawPPS *pps = (H265RawPPS*)content;
510  av_freep(&content);
511 }
512 
513 static void cbs_h265_free_slice(void *unit, uint8_t *content)
514 {
515  H265RawSlice *slice = (H265RawSlice*)content;
516  av_buffer_unref(&slice->data_ref);
517  av_freep(&content);
518 }
519 
521 {
522  switch (payload->payload_type) {
535  break;
538  break;
541  break;
542  default:
543  av_buffer_unref(&payload->payload.other.data_ref);
544  break;
545  }
546 }
547 
548 static void cbs_h265_free_sei(void *unit, uint8_t *content)
549 {
550  H265RawSEI *sei = (H265RawSEI*)content;
551  int i;
552  for (i = 0; i < sei->payload_count; i++)
554  av_freep(&content);
555 }
556 
559  const H2645Packet *packet)
560 {
561  int err, i;
562 
563  for (i = 0; i < packet->nb_nals; i++) {
564  const H2645NAL *nal = &packet->nals[i];
565  AVBufferRef *ref;
566  size_t size = nal->size;
567 
568  // Remove trailing zeroes.
569  while (size > 0 && nal->data[size - 1] == 0)
570  --size;
571  av_assert0(size > 0);
572 
573  ref = (nal->data == nal->raw_data) ? frag->data_ref
574  : packet->rbsp.rbsp_buffer_ref;
575 
576  err = ff_cbs_insert_unit_data(ctx, frag, -1, nal->type,
577  (uint8_t*)nal->data, size, ref);
578  if (err < 0)
579  return err;
580  }
581 
582  return 0;
583 }
584 
587  int header)
588 {
589  enum AVCodecID codec_id = ctx->codec->codec_id;
591  GetByteContext gbc;
592  int err;
593 
594  av_assert0(frag->data && frag->nb_units == 0);
595  if (frag->data_size == 0)
596  return 0;
597 
598  if (header && frag->data[0] && codec_id == AV_CODEC_ID_H264) {
599  // AVCC header.
600  size_t size, start, end;
601  int i, count, version;
602 
603  priv->mp4 = 1;
604 
605  bytestream2_init(&gbc, frag->data, frag->data_size);
606 
607  if (bytestream2_get_bytes_left(&gbc) < 6)
608  return AVERROR_INVALIDDATA;
609 
610  version = bytestream2_get_byte(&gbc);
611  if (version != 1) {
612  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid AVCC header: "
613  "first byte %u.", version);
614  return AVERROR_INVALIDDATA;
615  }
616 
617  bytestream2_skip(&gbc, 3);
618  priv->nal_length_size = (bytestream2_get_byte(&gbc) & 3) + 1;
619 
620  // SPS array.
621  count = bytestream2_get_byte(&gbc) & 0x1f;
622  start = bytestream2_tell(&gbc);
623  for (i = 0; i < count; i++) {
624  if (bytestream2_get_bytes_left(&gbc) < 2 * (count - i))
625  return AVERROR_INVALIDDATA;
626  size = bytestream2_get_be16(&gbc);
627  if (bytestream2_get_bytes_left(&gbc) < size)
628  return AVERROR_INVALIDDATA;
629  bytestream2_skip(&gbc, size);
630  }
631  end = bytestream2_tell(&gbc);
632 
633  err = ff_h2645_packet_split(&priv->read_packet,
634  frag->data + start, end - start,
635  ctx->log_ctx, 1, 2, AV_CODEC_ID_H264, 1, 1);
636  if (err < 0) {
637  av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split AVCC SPS array.\n");
638  return err;
639  }
640  err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
641  if (err < 0)
642  return err;
643 
644  // PPS array.
645  count = bytestream2_get_byte(&gbc);
646  start = bytestream2_tell(&gbc);
647  for (i = 0; i < count; i++) {
648  if (bytestream2_get_bytes_left(&gbc) < 2 * (count - i))
649  return AVERROR_INVALIDDATA;
650  size = bytestream2_get_be16(&gbc);
651  if (bytestream2_get_bytes_left(&gbc) < size)
652  return AVERROR_INVALIDDATA;
653  bytestream2_skip(&gbc, size);
654  }
655  end = bytestream2_tell(&gbc);
656 
657  err = ff_h2645_packet_split(&priv->read_packet,
658  frag->data + start, end - start,
659  ctx->log_ctx, 1, 2, AV_CODEC_ID_H264, 1, 1);
660  if (err < 0) {
661  av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split AVCC PPS array.\n");
662  return err;
663  }
664  err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
665  if (err < 0)
666  return err;
667 
668  if (bytestream2_get_bytes_left(&gbc) > 0) {
669  av_log(ctx->log_ctx, AV_LOG_WARNING, "%u bytes left at end of AVCC "
670  "header.\n", bytestream2_get_bytes_left(&gbc));
671  }
672 
673  } else if (header && frag->data[0] && codec_id == AV_CODEC_ID_HEVC) {
674  // HVCC header.
675  size_t size, start, end;
676  int i, j, nb_arrays, nal_unit_type, nb_nals, version;
677 
678  priv->mp4 = 1;
679 
680  bytestream2_init(&gbc, frag->data, frag->data_size);
681 
682  if (bytestream2_get_bytes_left(&gbc) < 23)
683  return AVERROR_INVALIDDATA;
684 
685  version = bytestream2_get_byte(&gbc);
686  if (version != 1) {
687  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid HVCC header: "
688  "first byte %u.", version);
689  return AVERROR_INVALIDDATA;
690  }
691 
692  bytestream2_skip(&gbc, 20);
693  priv->nal_length_size = (bytestream2_get_byte(&gbc) & 3) + 1;
694 
695  nb_arrays = bytestream2_get_byte(&gbc);
696  for (i = 0; i < nb_arrays; i++) {
697  nal_unit_type = bytestream2_get_byte(&gbc) & 0x3f;
698  nb_nals = bytestream2_get_be16(&gbc);
699 
700  start = bytestream2_tell(&gbc);
701  for (j = 0; j < nb_nals; j++) {
702  if (bytestream2_get_bytes_left(&gbc) < 2)
703  return AVERROR_INVALIDDATA;
704  size = bytestream2_get_be16(&gbc);
705  if (bytestream2_get_bytes_left(&gbc) < size)
706  return AVERROR_INVALIDDATA;
707  bytestream2_skip(&gbc, size);
708  }
709  end = bytestream2_tell(&gbc);
710 
711  err = ff_h2645_packet_split(&priv->read_packet,
712  frag->data + start, end - start,
713  ctx->log_ctx, 1, 2, AV_CODEC_ID_HEVC, 1, 1);
714  if (err < 0) {
715  av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split "
716  "HVCC array %d (%d NAL units of type %d).\n",
717  i, nb_nals, nal_unit_type);
718  return err;
719  }
720  err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
721  if (err < 0)
722  return err;
723  }
724 
725  } else {
726  // Annex B, or later MP4 with already-known parameters.
727 
728  err = ff_h2645_packet_split(&priv->read_packet,
729  frag->data, frag->data_size,
730  ctx->log_ctx,
731  priv->mp4, priv->nal_length_size,
732  codec_id, 1, 1);
733  if (err < 0)
734  return err;
735 
736  err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
737  if (err < 0)
738  return err;
739  }
740 
741  return 0;
742 }
743 
744 #define cbs_h2645_replace_ps(h26n, ps_name, ps_var, id_element) \
745 static int cbs_h26 ## h26n ## _replace_ ## ps_var(CodedBitstreamContext *ctx, \
746  CodedBitstreamUnit *unit) \
747 { \
748  CodedBitstreamH26 ## h26n ## Context *priv = ctx->priv_data; \
749  H26 ## h26n ## Raw ## ps_name *ps_var = unit->content; \
750  unsigned int id = ps_var->id_element; \
751  if (id > FF_ARRAY_ELEMS(priv->ps_var)) { \
752  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid " #ps_name \
753  " id : %d.\n", id); \
754  return AVERROR_INVALIDDATA; \
755  } \
756  if (priv->ps_var[id] == priv->active_ ## ps_var) \
757  priv->active_ ## ps_var = NULL ; \
758  av_buffer_unref(&priv->ps_var ## _ref[id]); \
759  if (unit->content_ref) \
760  priv->ps_var ## _ref[id] = av_buffer_ref(unit->content_ref); \
761  else \
762  priv->ps_var ## _ref[id] = av_buffer_alloc(sizeof(*ps_var)); \
763  if (!priv->ps_var ## _ref[id]) \
764  return AVERROR(ENOMEM); \
765  priv->ps_var[id] = (H26 ## h26n ## Raw ## ps_name *)priv->ps_var ## _ref[id]->data; \
766  if (!unit->content_ref) \
767  memcpy(priv->ps_var[id], ps_var, sizeof(*ps_var)); \
768  return 0; \
769 }
770 
771 cbs_h2645_replace_ps(4, SPS, sps, seq_parameter_set_id)
772 cbs_h2645_replace_ps(4, PPS, pps, pic_parameter_set_id)
773 cbs_h2645_replace_ps(5, VPS, vps, vps_video_parameter_set_id)
774 cbs_h2645_replace_ps(5, SPS, sps, sps_seq_parameter_set_id)
775 cbs_h2645_replace_ps(5, PPS, pps, pps_pic_parameter_set_id)
776 
777 static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx,
778  CodedBitstreamUnit *unit)
779 {
780  GetBitContext gbc;
781  int err;
782 
783  err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
784  if (err < 0)
785  return err;
786 
787  switch (unit->type) {
788  case H264_NAL_SPS:
789  {
790  H264RawSPS *sps;
791 
792  err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*sps), NULL);
793  if (err < 0)
794  return err;
795  sps = unit->content;
796 
797  err = cbs_h264_read_sps(ctx, &gbc, sps);
798  if (err < 0)
799  return err;
800 
801  err = cbs_h264_replace_sps(ctx, unit);
802  if (err < 0)
803  return err;
804  }
805  break;
806 
807  case H264_NAL_SPS_EXT:
808  {
809  err = ff_cbs_alloc_unit_content(ctx, unit,
810  sizeof(H264RawSPSExtension),
811  NULL);
812  if (err < 0)
813  return err;
814 
815  err = cbs_h264_read_sps_extension(ctx, &gbc, unit->content);
816  if (err < 0)
817  return err;
818  }
819  break;
820 
821  case H264_NAL_PPS:
822  {
823  H264RawPPS *pps;
824 
825  err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*pps),
827  if (err < 0)
828  return err;
829  pps = unit->content;
830 
831  err = cbs_h264_read_pps(ctx, &gbc, pps);
832  if (err < 0)
833  return err;
834 
835  err = cbs_h264_replace_pps(ctx, unit);
836  if (err < 0)
837  return err;
838  }
839  break;
840 
841  case H264_NAL_SLICE:
842  case H264_NAL_IDR_SLICE:
844  {
845  H264RawSlice *slice;
846  int pos, len;
847 
848  err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*slice),
850  if (err < 0)
851  return err;
852  slice = unit->content;
853 
854  err = cbs_h264_read_slice_header(ctx, &gbc, &slice->header);
855  if (err < 0)
856  return err;
857 
858  pos = get_bits_count(&gbc);
859  len = unit->data_size;
860  if (!unit->data[len - 1]) {
861  int z;
862  for (z = 0; z < len && !unit->data[len - z - 1]; z++);
863  av_log(ctx->log_ctx, AV_LOG_DEBUG, "Deleted %d trailing zeroes "
864  "from slice data.\n", z);
865  len -= z;
866  }
867 
868  slice->data_size = len - pos / 8;
869  slice->data_ref = av_buffer_ref(unit->data_ref);
870  if (!slice->data_ref)
871  return AVERROR(ENOMEM);
872  slice->data = unit->data + pos / 8;
873  slice->data_bit_start = pos % 8;
874  }
875  break;
876 
877  case H264_NAL_AUD:
878  {
879  err = ff_cbs_alloc_unit_content(ctx, unit,
880  sizeof(H264RawAUD), NULL);
881  if (err < 0)
882  return err;
883 
884  err = cbs_h264_read_aud(ctx, &gbc, unit->content);
885  if (err < 0)
886  return err;
887  }
888  break;
889 
890  case H264_NAL_SEI:
891  {
892  err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(H264RawSEI),
894  if (err < 0)
895  return err;
896 
897  err = cbs_h264_read_sei(ctx, &gbc, unit->content);
898  if (err < 0)
899  return err;
900  }
901  break;
902 
904  {
905  err = ff_cbs_alloc_unit_content(ctx, unit,
906  sizeof(H264RawFiller), NULL);
907  if (err < 0)
908  return err;
909 
910  err = cbs_h264_read_filler(ctx, &gbc, unit->content);
911  if (err < 0)
912  return err;
913  }
914  break;
915 
917  case H264_NAL_END_STREAM:
918  {
919  err = ff_cbs_alloc_unit_content(ctx, unit,
920  sizeof(H264RawNALUnitHeader),
921  NULL);
922  if (err < 0)
923  return err;
924 
925  err = (unit->type == H264_NAL_END_SEQUENCE ?
926  cbs_h264_read_end_of_sequence :
927  cbs_h264_read_end_of_stream)(ctx, &gbc, unit->content);
928  if (err < 0)
929  return err;
930  }
931  break;
932 
933  default:
934  return AVERROR(ENOSYS);
935  }
936 
937  return 0;
938 }
939 
941  CodedBitstreamUnit *unit)
942 {
943  GetBitContext gbc;
944  int err;
945 
946  err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
947  if (err < 0)
948  return err;
949 
950  switch (unit->type) {
951  case HEVC_NAL_VPS:
952  {
953  H265RawVPS *vps;
954 
955  err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*vps),
957  if (err < 0)
958  return err;
959  vps = unit->content;
960 
961  err = cbs_h265_read_vps(ctx, &gbc, vps);
962  if (err < 0)
963  return err;
964 
965  err = cbs_h265_replace_vps(ctx, unit);
966  if (err < 0)
967  return err;
968  }
969  break;
970  case HEVC_NAL_SPS:
971  {
972  H265RawSPS *sps;
973 
974  err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*sps),
976  if (err < 0)
977  return err;
978  sps = unit->content;
979 
980  err = cbs_h265_read_sps(ctx, &gbc, sps);
981  if (err < 0)
982  return err;
983 
984  err = cbs_h265_replace_sps(ctx, unit);
985  if (err < 0)
986  return err;
987  }
988  break;
989 
990  case HEVC_NAL_PPS:
991  {
992  H265RawPPS *pps;
993 
994  err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*pps),
996  if (err < 0)
997  return err;
998  pps = unit->content;
999 
1000  err = cbs_h265_read_pps(ctx, &gbc, pps);
1001  if (err < 0)
1002  return err;
1003 
1004  err = cbs_h265_replace_pps(ctx, unit);
1005  if (err < 0)
1006  return err;
1007  }
1008  break;
1009 
1010  case HEVC_NAL_TRAIL_N:
1011  case HEVC_NAL_TRAIL_R:
1012  case HEVC_NAL_TSA_N:
1013  case HEVC_NAL_TSA_R:
1014  case HEVC_NAL_STSA_N:
1015  case HEVC_NAL_STSA_R:
1016  case HEVC_NAL_RADL_N:
1017  case HEVC_NAL_RADL_R:
1018  case HEVC_NAL_RASL_N:
1019  case HEVC_NAL_RASL_R:
1020  case HEVC_NAL_BLA_W_LP:
1021  case HEVC_NAL_BLA_W_RADL:
1022  case HEVC_NAL_BLA_N_LP:
1023  case HEVC_NAL_IDR_W_RADL:
1024  case HEVC_NAL_IDR_N_LP:
1025  case HEVC_NAL_CRA_NUT:
1026  {
1027  H265RawSlice *slice;
1028  int pos, len;
1029 
1030  err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*slice),
1032  if (err < 0)
1033  return err;
1034  slice = unit->content;
1035 
1036  err = cbs_h265_read_slice_segment_header(ctx, &gbc, &slice->header);
1037  if (err < 0)
1038  return err;
1039 
1040  pos = get_bits_count(&gbc);
1041  len = unit->data_size;
1042  if (!unit->data[len - 1]) {
1043  int z;
1044  for (z = 0; z < len && !unit->data[len - z - 1]; z++);
1045  av_log(ctx->log_ctx, AV_LOG_DEBUG, "Deleted %d trailing zeroes "
1046  "from slice data.\n", z);
1047  len -= z;
1048  }
1049 
1050  slice->data_size = len - pos / 8;
1051  slice->data_ref = av_buffer_ref(unit->data_ref);
1052  if (!slice->data_ref)
1053  return AVERROR(ENOMEM);
1054  slice->data = unit->data + pos / 8;
1055  slice->data_bit_start = pos % 8;
1056  }
1057  break;
1058 
1059  case HEVC_NAL_AUD:
1060  {
1061  err = ff_cbs_alloc_unit_content(ctx, unit,
1062  sizeof(H265RawAUD), NULL);
1063  if (err < 0)
1064  return err;
1065 
1066  err = cbs_h265_read_aud(ctx, &gbc, unit->content);
1067  if (err < 0)
1068  return err;
1069  }
1070  break;
1071 
1072  case HEVC_NAL_SEI_PREFIX:
1073  case HEVC_NAL_SEI_SUFFIX:
1074  {
1075  err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(H265RawSEI),
1077 
1078  if (err < 0)
1079  return err;
1080 
1081  err = cbs_h265_read_sei(ctx, &gbc, unit->content,
1082  unit->type == HEVC_NAL_SEI_PREFIX);
1083 
1084  if (err < 0)
1085  return err;
1086  }
1087  break;
1088 
1089  default:
1090  return AVERROR(ENOSYS);
1091  }
1092 
1093  return 0;
1094 }
1095 
1097  PutBitContext *pbc, const uint8_t *data,
1098  size_t data_size, int data_bit_start)
1099 {
1100  size_t rest = data_size - (data_bit_start + 7) / 8;
1101  const uint8_t *pos = data + data_bit_start / 8;
1102 
1103  av_assert0(data_bit_start >= 0 &&
1104  data_size > data_bit_start / 8);
1105 
1106  if (data_size * 8 + 8 > put_bits_left(pbc))
1107  return AVERROR(ENOSPC);
1108 
1109  if (!rest)
1110  goto rbsp_stop_one_bit;
1111 
1112  // First copy the remaining bits of the first byte
1113  // The above check ensures that we do not accidentally
1114  // copy beyond the rbsp_stop_one_bit.
1115  if (data_bit_start % 8)
1116  put_bits(pbc, 8 - data_bit_start % 8,
1117  *pos++ & MAX_UINT_BITS(8 - data_bit_start % 8));
1118 
1119  if (put_bits_count(pbc) % 8 == 0) {
1120  // If the writer is aligned at this point,
1121  // memcpy can be used to improve performance.
1122  // This happens normally for CABAC.
1123  flush_put_bits(pbc);
1124  memcpy(put_bits_ptr(pbc), pos, rest);
1125  skip_put_bytes(pbc, rest);
1126  } else {
1127  // If not, we have to copy manually.
1128  // rbsp_stop_one_bit forces us to special-case
1129  // the last byte.
1130  uint8_t temp;
1131  int i;
1132 
1133  for (; rest > 4; rest -= 4, pos += 4)
1134  put_bits32(pbc, AV_RB32(pos));
1135 
1136  for (; rest > 1; rest--, pos++)
1137  put_bits(pbc, 8, *pos);
1138 
1139  rbsp_stop_one_bit:
1140  temp = rest ? *pos : *pos & MAX_UINT_BITS(8 - data_bit_start % 8);
1141 
1142  av_assert0(temp);
1143  i = ff_ctz(*pos);
1144  temp = temp >> i;
1145  i = rest ? (8 - i) : (8 - i - data_bit_start % 8);
1146  put_bits(pbc, i, temp);
1147  if (put_bits_count(pbc) % 8)
1148  put_bits(pbc, 8 - put_bits_count(pbc) % 8, 0);
1149  }
1150 
1151  return 0;
1152 }
1153 
1155  CodedBitstreamUnit *unit,
1156  PutBitContext *pbc)
1157 {
1158  int err;
1159 
1160  switch (unit->type) {
1161  case H264_NAL_SPS:
1162  {
1163  H264RawSPS *sps = unit->content;
1164 
1165  err = cbs_h264_write_sps(ctx, pbc, sps);
1166  if (err < 0)
1167  return err;
1168 
1169  err = cbs_h264_replace_sps(ctx, unit);
1170  if (err < 0)
1171  return err;
1172  }
1173  break;
1174 
1175  case H264_NAL_SPS_EXT:
1176  {
1177  H264RawSPSExtension *sps_ext = unit->content;
1178 
1179  err = cbs_h264_write_sps_extension(ctx, pbc, sps_ext);
1180  if (err < 0)
1181  return err;
1182  }
1183  break;
1184 
1185  case H264_NAL_PPS:
1186  {
1187  H264RawPPS *pps = unit->content;
1188 
1189  err = cbs_h264_write_pps(ctx, pbc, pps);
1190  if (err < 0)
1191  return err;
1192 
1193  err = cbs_h264_replace_pps(ctx, unit);
1194  if (err < 0)
1195  return err;
1196  }
1197  break;
1198 
1199  case H264_NAL_SLICE:
1200  case H264_NAL_IDR_SLICE:
1202  {
1203  H264RawSlice *slice = unit->content;
1204 
1205  err = cbs_h264_write_slice_header(ctx, pbc, &slice->header);
1206  if (err < 0)
1207  return err;
1208 
1209  if (slice->data) {
1210  err = cbs_h2645_write_slice_data(ctx, pbc, slice->data,
1211  slice->data_size,
1212  slice->data_bit_start);
1213  if (err < 0)
1214  return err;
1215  } else {
1216  // No slice data - that was just the header.
1217  // (Bitstream may be unaligned!)
1218  }
1219  }
1220  break;
1221 
1222  case H264_NAL_AUD:
1223  {
1224  err = cbs_h264_write_aud(ctx, pbc, unit->content);
1225  if (err < 0)
1226  return err;
1227  }
1228  break;
1229 
1230  case H264_NAL_SEI:
1231  {
1232  err = cbs_h264_write_sei(ctx, pbc, unit->content);
1233  if (err < 0)
1234  return err;
1235  }
1236  break;
1237 
1238  case H264_NAL_FILLER_DATA:
1239  {
1240  err = cbs_h264_write_filler(ctx, pbc, unit->content);
1241  if (err < 0)
1242  return err;
1243  }
1244  break;
1245 
1246  case H264_NAL_END_SEQUENCE:
1247  {
1248  err = cbs_h264_write_end_of_sequence(ctx, pbc, unit->content);
1249  if (err < 0)
1250  return err;
1251  }
1252  break;
1253 
1254  case H264_NAL_END_STREAM:
1255  {
1256  err = cbs_h264_write_end_of_stream(ctx, pbc, unit->content);
1257  if (err < 0)
1258  return err;
1259  }
1260  break;
1261 
1262  default:
1263  av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for "
1264  "NAL unit type %"PRIu32".\n", unit->type);
1265  return AVERROR_PATCHWELCOME;
1266  }
1267 
1268  return 0;
1269 }
1270 
1272  CodedBitstreamUnit *unit,
1273  PutBitContext *pbc)
1274 {
1275  int err;
1276 
1277  switch (unit->type) {
1278  case HEVC_NAL_VPS:
1279  {
1280  H265RawVPS *vps = unit->content;
1281 
1282  err = cbs_h265_write_vps(ctx, pbc, vps);
1283  if (err < 0)
1284  return err;
1285 
1286  err = cbs_h265_replace_vps(ctx, unit);
1287  if (err < 0)
1288  return err;
1289  }
1290  break;
1291 
1292  case HEVC_NAL_SPS:
1293  {
1294  H265RawSPS *sps = unit->content;
1295 
1296  err = cbs_h265_write_sps(ctx, pbc, sps);
1297  if (err < 0)
1298  return err;
1299 
1300  err = cbs_h265_replace_sps(ctx, unit);
1301  if (err < 0)
1302  return err;
1303  }
1304  break;
1305 
1306  case HEVC_NAL_PPS:
1307  {
1308  H265RawPPS *pps = unit->content;
1309 
1310  err = cbs_h265_write_pps(ctx, pbc, pps);
1311  if (err < 0)
1312  return err;
1313 
1314  err = cbs_h265_replace_pps(ctx, unit);
1315  if (err < 0)
1316  return err;
1317  }
1318  break;
1319 
1320  case HEVC_NAL_TRAIL_N:
1321  case HEVC_NAL_TRAIL_R:
1322  case HEVC_NAL_TSA_N:
1323  case HEVC_NAL_TSA_R:
1324  case HEVC_NAL_STSA_N:
1325  case HEVC_NAL_STSA_R:
1326  case HEVC_NAL_RADL_N:
1327  case HEVC_NAL_RADL_R:
1328  case HEVC_NAL_RASL_N:
1329  case HEVC_NAL_RASL_R:
1330  case HEVC_NAL_BLA_W_LP:
1331  case HEVC_NAL_BLA_W_RADL:
1332  case HEVC_NAL_BLA_N_LP:
1333  case HEVC_NAL_IDR_W_RADL:
1334  case HEVC_NAL_IDR_N_LP:
1335  case HEVC_NAL_CRA_NUT:
1336  {
1337  H265RawSlice *slice = unit->content;
1338 
1339  err = cbs_h265_write_slice_segment_header(ctx, pbc, &slice->header);
1340  if (err < 0)
1341  return err;
1342 
1343  if (slice->data) {
1344  err = cbs_h2645_write_slice_data(ctx, pbc, slice->data,
1345  slice->data_size,
1346  slice->data_bit_start);
1347  if (err < 0)
1348  return err;
1349  } else {
1350  // No slice data - that was just the header.
1351  }
1352  }
1353  break;
1354 
1355  case HEVC_NAL_AUD:
1356  {
1357  err = cbs_h265_write_aud(ctx, pbc, unit->content);
1358  if (err < 0)
1359  return err;
1360  }
1361  break;
1362 
1363  case HEVC_NAL_SEI_PREFIX:
1364  case HEVC_NAL_SEI_SUFFIX:
1365  {
1366  err = cbs_h265_write_sei(ctx, pbc, unit->content,
1367  unit->type == HEVC_NAL_SEI_PREFIX);
1368 
1369  if (err < 0)
1370  return err;
1371  }
1372  break;
1373 
1374  default:
1375  av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for "
1376  "NAL unit type %"PRIu32".\n", unit->type);
1377  return AVERROR_PATCHWELCOME;
1378  }
1379 
1380  return 0;
1381 }
1382 
1384  CodedBitstreamFragment *frag)
1385 {
1386  uint8_t *data;
1387  size_t max_size, dp, sp;
1388  int err, i, zero_run;
1389 
1390  for (i = 0; i < frag->nb_units; i++) {
1391  // Data should already all have been written when we get here.
1392  av_assert0(frag->units[i].data);
1393  }
1394 
1395  max_size = 0;
1396  for (i = 0; i < frag->nb_units; i++) {
1397  // Start code + content with worst-case emulation prevention.
1398  max_size += 4 + frag->units[i].data_size * 3 / 2;
1399  }
1400 
1401  data = av_malloc(max_size + AV_INPUT_BUFFER_PADDING_SIZE);
1402  if (!data)
1403  return AVERROR(ENOMEM);
1404 
1405  dp = 0;
1406  for (i = 0; i < frag->nb_units; i++) {
1407  CodedBitstreamUnit *unit = &frag->units[i];
1408 
1409  if (unit->data_bit_padding > 0) {
1410  if (i < frag->nb_units - 1)
1411  av_log(ctx->log_ctx, AV_LOG_WARNING, "Probably invalid "
1412  "unaligned padding on non-final NAL unit.\n");
1413  else
1414  frag->data_bit_padding = unit->data_bit_padding;
1415  }
1416 
1417  if ((ctx->codec->codec_id == AV_CODEC_ID_H264 &&
1418  (unit->type == H264_NAL_SPS ||
1419  unit->type == H264_NAL_PPS)) ||
1420  (ctx->codec->codec_id == AV_CODEC_ID_HEVC &&
1421  (unit->type == HEVC_NAL_VPS ||
1422  unit->type == HEVC_NAL_SPS ||
1423  unit->type == HEVC_NAL_PPS)) ||
1424  i == 0 /* (Assume this is the start of an access unit.) */) {
1425  // zero_byte
1426  data[dp++] = 0;
1427  }
1428  // start_code_prefix_one_3bytes
1429  data[dp++] = 0;
1430  data[dp++] = 0;
1431  data[dp++] = 1;
1432 
1433  zero_run = 0;
1434  for (sp = 0; sp < unit->data_size; sp++) {
1435  if (zero_run < 2) {
1436  if (unit->data[sp] == 0)
1437  ++zero_run;
1438  else
1439  zero_run = 0;
1440  } else {
1441  if ((unit->data[sp] & ~3) == 0) {
1442  // emulation_prevention_three_byte
1443  data[dp++] = 3;
1444  }
1445  zero_run = unit->data[sp] == 0;
1446  }
1447  data[dp++] = unit->data[sp];
1448  }
1449  }
1450 
1451  av_assert0(dp <= max_size);
1452  err = av_reallocp(&data, dp + AV_INPUT_BUFFER_PADDING_SIZE);
1453  if (err)
1454  return err;
1455  memset(data + dp, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1456 
1458  NULL, NULL, 0);
1459  if (!frag->data_ref) {
1460  av_freep(&data);
1461  return AVERROR(ENOMEM);
1462  }
1463 
1464  frag->data = data;
1465  frag->data_size = dp;
1466 
1467  return 0;
1468 }
1469 
1471 {
1472  CodedBitstreamH264Context *h264 = ctx->priv_data;
1473  int i;
1474 
1476 
1477  for (i = 0; i < FF_ARRAY_ELEMS(h264->sps); i++)
1478  av_buffer_unref(&h264->sps_ref[i]);
1479  for (i = 0; i < FF_ARRAY_ELEMS(h264->pps); i++)
1480  av_buffer_unref(&h264->pps_ref[i]);
1481 }
1482 
1484 {
1485  CodedBitstreamH265Context *h265 = ctx->priv_data;
1486  int i;
1487 
1489 
1490  for (i = 0; i < FF_ARRAY_ELEMS(h265->vps); i++)
1491  av_buffer_unref(&h265->vps_ref[i]);
1492  for (i = 0; i < FF_ARRAY_ELEMS(h265->sps); i++)
1493  av_buffer_unref(&h265->sps_ref[i]);
1494  for (i = 0; i < FF_ARRAY_ELEMS(h265->pps); i++)
1495  av_buffer_unref(&h265->pps_ref[i]);
1496 }
1497 
1500 
1501  .priv_data_size = sizeof(CodedBitstreamH264Context),
1502 
1503  .split_fragment = &cbs_h2645_split_fragment,
1504  .read_unit = &cbs_h264_read_nal_unit,
1505  .write_unit = &cbs_h264_write_nal_unit,
1506  .assemble_fragment = &cbs_h2645_assemble_fragment,
1507 
1508  .close = &cbs_h264_close,
1509 };
1510 
1513 
1514  .priv_data_size = sizeof(CodedBitstreamH265Context),
1515 
1516  .split_fragment = &cbs_h2645_split_fragment,
1517  .read_unit = &cbs_h265_read_nal_unit,
1518  .write_unit = &cbs_h265_write_nal_unit,
1519  .assemble_fragment = &cbs_h2645_assemble_fragment,
1520 
1521  .close = &cbs_h265_close,
1522 };
1523 
1526  const H264RawSEIPayload *payload)
1527 {
1528  H264RawSEI *sei;
1529  CodedBitstreamUnit *nal = NULL;
1530  int err, i;
1531 
1532  // Find an existing SEI NAL unit to add to.
1533  for (i = 0; i < au->nb_units; i++) {
1534  if (au->units[i].type == H264_NAL_SEI) {
1535  nal = &au->units[i];
1536  break;
1537  }
1538  }
1539  if (nal) {
1540  sei = nal->content;
1541 
1542  } else {
1543  // Need to make a new SEI NAL unit. Insert it before the first
1544  // slice data NAL unit; if no slice data, add at the end.
1545  AVBufferRef *sei_ref;
1546 
1547  sei = av_mallocz(sizeof(*sei));
1548  if (!sei)
1549  return AVERROR(ENOMEM);
1550 
1552  sei->nal_unit_header.nal_ref_idc = 0;
1553 
1554  sei_ref = av_buffer_create((uint8_t*)sei, sizeof(*sei),
1555  &cbs_h264_free_sei, ctx, 0);
1556  if (!sei_ref) {
1557  av_freep(&sei);
1558  return AVERROR(ENOMEM);
1559  }
1560 
1561  for (i = 0; i < au->nb_units; i++) {
1562  if (au->units[i].type == H264_NAL_SLICE ||
1563  au->units[i].type == H264_NAL_IDR_SLICE)
1564  break;
1565  }
1566 
1567  err = ff_cbs_insert_unit_content(ctx, au, i, H264_NAL_SEI,
1568  sei, sei_ref);
1569  av_buffer_unref(&sei_ref);
1570  if (err < 0)
1571  return err;
1572  }
1573 
1574  if (sei->payload_count >= H264_MAX_SEI_PAYLOADS) {
1575  av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many payloads in "
1576  "SEI NAL unit.\n");
1577  return AVERROR(EINVAL);
1578  }
1579 
1580  memcpy(&sei->payload[sei->payload_count], payload, sizeof(*payload));
1581  ++sei->payload_count;
1582 
1583  return 0;
1584 }
1585 
1588  CodedBitstreamUnit *nal,
1589  int position)
1590 {
1591  H264RawSEI *sei = nal->content;
1592 
1593  av_assert0(nal->type == H264_NAL_SEI);
1594  av_assert0(position >= 0 && position < sei->payload_count);
1595 
1596  if (position == 0 && sei->payload_count == 1) {
1597  // Deleting NAL unit entirely.
1598  int i;
1599 
1600  for (i = 0; i < au->nb_units; i++) {
1601  if (&au->units[i] == nal)
1602  break;
1603  }
1604 
1605  ff_cbs_delete_unit(ctx, au, i);
1606  } else {
1607  cbs_h264_free_sei_payload(&sei->payload[position]);
1608 
1609  --sei->payload_count;
1610  memmove(sei->payload + position,
1611  sei->payload + position + 1,
1612  (sei->payload_count - position) * sizeof(*sei->payload));
1613  }
1614 }
const char * name
Definition: avisynth_c.h:867
uint32_t payload_type
Definition: cbs_h264.h:322
static void av_unused put_bits32(PutBitContext *s, uint32_t value)
Write exactly 32 bits into a bitstream.
Definition: put_bits.h:250
#define NULL
Definition: coverity.c:32
struct H265RawSEIPayload::@56::@57 other
#define ff_ctz
Definition: intmath.h:106
int nb_units
Number of units in this fragment.
Definition: cbs.h:147
H265RawPPS * pps[HEVC_MAX_PPS_COUNT]
Definition: cbs_h265.h:738
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
H265RawSEIUserDataUnregistered user_data_unregistered
Definition: cbs_h265.h:701
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 size
static int cbs_h2645_write_slice_data(CodedBitstreamContext *ctx, PutBitContext *pbc, const uint8_t *data, size_t data_size, int data_bit_start)
Definition: cbs_h2645.c:1096
AVBufferRef * sps_ref[H264_MAX_SPS_COUNT]
Definition: cbs_h264.h:451
int size
Definition: h2645_parse.h:35
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:208
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
else temp
Definition: vf_mcdeint.c:256
AVBufferRef * data_ref
Definition: cbs_h265.h:188
H264RawPPS * pps[H264_MAX_PPS_COUNT]
Definition: cbs_h264.h:454
AVBufferRef * sps_ref[HEVC_MAX_SPS_COUNT]
Definition: cbs_h265.h:734
void ff_cbs_delete_unit(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag, int position)
Delete a unit from a fragment and free all memory it uses.
Definition: cbs.c:796
uint8_t * data
Definition: cbs_h265.h:544
Sequence parameter set.
Definition: h264_ps.h:44
enum AVCodecID codec_id
Definition: qsv.c:72
H264RawNALUnitHeader nal_unit_header
Definition: cbs_h264.h:345
CodedBitstreamUnitType type
Codec-specific type of this unit.
Definition: cbs.h:68
static int cbs_h265_write_nal_unit(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit, PutBitContext *pbc)
Definition: cbs_h2645.c:1271
static int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit)
Definition: cbs_h2645.c:940
static int cbs_read_ue_golomb(CodedBitstreamContext *ctx, GetBitContext *gbc, const char *name, const int *subscripts, uint32_t *write_to, uint32_t range_min, uint32_t range_max)
Definition: cbs_h2645.c:34
int ff_cbs_alloc_unit_content(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit, size_t size, void(*free)(void *opaque, uint8_t *data))
Definition: cbs.c:644
Picture parameter set.
Definition: h264_ps.h:109
int ff_cbs_insert_unit_content(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag, int position, CodedBitstreamUnitType type, void *content, AVBufferRef *content_buf)
Insert a new unit into a fragment with the given content.
Definition: cbs.c:722
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:133
static int cbs_h2645_assemble_fragment(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag)
Definition: cbs_h2645.c:1383
union H265RawSEIPayload::@56 payload
int version
Definition: avisynth_c.h:858
static void cbs_h265_free_sei_payload(H265RawSEIPayload *payload)
Definition: cbs_h2645.c:520
CodedBitstreamH2645Context common
Definition: cbs_h265.h:729
static int cbs_write_se_golomb(CodedBitstreamContext *ctx, PutBitContext *pbc, const char *name, const int *subscripts, int32_t value, int32_t range_min, int32_t range_max)
Definition: cbs_h2645.c:185
int ff_cbs_h264_add_sei_message(CodedBitstreamContext *ctx, CodedBitstreamFragment *au, const H264RawSEIPayload *payload)
Add an SEI message to an access unit.
Definition: cbs_h2645.c:1524
Macro definitions for various function/variable attributes.
pan-scan rectangle
Definition: h264_sei.h:30
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int trace_enable
Enable trace output during read/write operations.
Definition: cbs.h:206
static void cbs_h264_free_pps(void *unit, uint8_t *content)
Definition: cbs_h2645.c:446
uint8_t
#define av_malloc(s)
AVBufferRef * pps_ref[HEVC_MAX_PPS_COUNT]
Definition: cbs_h265.h:735
#define MAX_UINT_BITS(length)
Definition: cbs_internal.h:98
#define AV_RB32
Definition: intreadwrite.h:130
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
int data_bit_start
Definition: cbs_h265.h:546
unregistered user data
Definition: h264_sei.h:33
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:393
static void cbs_h265_free_slice(void *unit, uint8_t *content)
Definition: cbs_h2645.c:513
display orientation
Definition: h264_sei.h:36
size_t data_bit_padding
The number of bits which should be ignored in the final byte.
Definition: cbs.h:86
H265RawSPS * sps[HEVC_MAX_SPS_COUNT]
Definition: cbs_h265.h:737
void ff_h2645_packet_uninit(H2645Packet *pkt)
Free all the allocated memory in the packet.
Definition: h2645_parse.c:517
const char data[16]
Definition: mxf.c:91
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:219
H264RawSPS * sps[H264_MAX_SPS_COUNT]
Definition: cbs_h264.h:453
#define sp
Definition: regdef.h:63
H265RawSEIPayload payload[H265_MAX_SEI_PAYLOADS]
Definition: cbs_h265.h:723
static void cbs_h264_close(CodedBitstreamContext *ctx)
Definition: cbs_h2645.c:1470
Coded bitstream unit structure.
Definition: cbs.h:64
void * content
Pointer to the decomposed form of this unit.
Definition: cbs.h:101
static const uint8_t header[24]
Definition: sdr2.c:67
CodedBitstreamUnit * units
Pointer to an array of units of length nb_units_allocated.
Definition: cbs.h:162
H265RawPSExtensionData extension_data
Definition: cbs_h265.h:416
uint8_t * data
Pointer to the directly-parsable bitstream form of this unit.
Definition: cbs.h:75
int ff_cbs_insert_unit_data(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag, int position, CodedBitstreamUnitType type, uint8_t *data, size_t data_size, AVBufferRef *data_buf)
Insert a new unit into a fragment with the given data bitstream.
Definition: cbs.c:759
alternative transfer
Definition: h264_sei.h:39
#define av_log(a,...)
size_t data_size
The number of bytes in the bitstream.
Definition: cbs.h:129
H.264 common definitions.
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:849
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:215
buffering period (H.264, D.1.1)
Definition: h264_sei.h:28
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static uint8_t * put_bits_ptr(PutBitContext *s)
Return the pointer to the byte where the bitstream writer will put the next bit.
Definition: put_bits.h:324
static void cbs_h265_free_pps(void *unit, uint8_t *content)
Definition: cbs_h2645.c:506
static int put_bits_left(PutBitContext *s)
Definition: put_bits.h:93
#define AVERROR(e)
Definition: error.h:43
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:164
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
AVBufferRef * data_ref
Definition: cbs_h265.h:547
static av_always_inline unsigned int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:154
simple assert() macros that are a bit more flexible than ISO C assert().
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
uint8_t bits
Definition: vp3data.h:202
AVBufferRef * av_buffer_create(uint8_t *data, int size, void(*free)(void *opaque, uint8_t *data), void *opaque, int flags)
Create an AVBuffer from an existing array.
Definition: buffer.c:28
size_t data_bit_padding
The number of bits which should be ignored in the final byte.
Definition: cbs.h:133
static int put_bits_count(PutBitContext *s)
Definition: put_bits.h:85
H264RawSEIUserDataUnregistered user_data_unregistered
Definition: cbs_h264.h:330
void * log_ctx
Logging context to be passed to all av_log() calls associated with this context.
Definition: cbs.h:173
static void cbs_h264_free_sei_payload(H264RawSEIPayload *payload)
Definition: cbs_h2645.c:453
const CodedBitstreamType ff_cbs_type_h264
Definition: cbs_h2645.c:1498
static void cbs_h265_close(CodedBitstreamContext *ctx)
Definition: cbs_h2645.c:1483
uint32_t payload_type
Definition: cbs_h265.h:694
static void skip_put_bytes(PutBitContext *s, int n)
Skip the given number of bytes.
Definition: put_bits.h:333
picture timing
Definition: h264_sei.h:29
H265RawPSExtensionData extension_data
Definition: cbs_h265.h:224
int32_t
AVFormatContext * ctx
Definition: movenc.c:48
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:446
static void cbs_h265_free_vps(void *unit, uint8_t *content)
Definition: cbs_h2645.c:492
size_t data_size
Definition: cbs_h264.h:433
int type
NAL unit type.
Definition: h2645_parse.h:52
uint8_t * data
Pointer to the bitstream form of this fragment.
Definition: cbs.h:122
#define FF_ARRAY_ELEMS(a)
#define av_log2
Definition: intmath.h:83
AVBufferRef * pps_ref[H264_MAX_PPS_COUNT]
Definition: cbs_h264.h:452
H264RawSEIUserDataRegistered user_data_registered
Definition: cbs_h264.h:329
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
static av_always_inline int bytestream2_tell(GetByteContext *g)
Definition: bytestream.h:188
uint8_t payload_count
Definition: cbs_h265.h:724
int av_reallocp(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory through a pointer to a pointer.
Definition: mem.c:163
static void cbs_h264_free_slice(void *unit, uint8_t *content)
Definition: cbs_h2645.c:485
H265RawSEIUserDataRegistered user_data_registered
Definition: cbs_h265.h:700
Coded bitstream fragment structure, combining one or more units.
Definition: cbs.h:116
AVBufferRef * rbsp_buffer_ref
Definition: h2645_parse.h:70
const uint8_t * data
Definition: h2645_parse.h:36
AVBufferRef * slice_group_id_ref
Definition: cbs_h264.h:199
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:498
double value
Definition: eval.c:98
static int FUNC() pps(CodedBitstreamContext *ctx, RWContext *rw, H264RawPPS *current)
Context structure for coded bitstream operations.
Definition: cbs.h:168
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:659
static int FUNC() sps(CodedBitstreamContext *ctx, RWContext *rw, H264RawSPS *current)
recovery point (frame # to decoder sync)
Definition: h264_sei.h:34
static int cbs_h2645_read_more_rbsp_data(GetBitContext *gbc)
Definition: cbs_h2645.c:325
struct H264RawSEIPayload::@51::@52 other
enum AVCodecID codec_id
Definition: cbs_internal.h:29
registered user data as specified by Rec. ITU-T T.35
Definition: h264_sei.h:32
H264RawSEIPayload payload[H264_MAX_SEI_PAYLOADS]
Definition: cbs_h264.h:347
static void cbs_h265_free_sei(void *unit, uint8_t *content)
Definition: cbs_h2645.c:548
static int FUNC() vps(CodedBitstreamContext *ctx, RWContext *rw, H265RawVPS *current)
H2645RBSP rbsp
Definition: h2645_parse.h:78
static int cbs_read_se_golomb(CodedBitstreamContext *ctx, GetBitContext *gbc, const char *name, const int *subscripts, int32_t *write_to, int32_t range_min, int32_t range_max)
Definition: cbs_h2645.c:86
AVBufferRef * vps_ref[HEVC_MAX_VPS_COUNT]
Definition: cbs_h265.h:733
void * priv_data
Internal codec-specific data.
Definition: cbs.h:189
AVBufferRef * data_ref
Definition: cbs_h264.h:435
A reference to a data buffer.
Definition: buffer.h:81
H265RawPSExtensionData extension_data
Definition: cbs_h265.h:328
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:101
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
AVBufferRef * data_ref
A reference to the buffer containing data.
Definition: cbs.h:92
AVBufferRef * av_buffer_ref(AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:93
const CodedBitstreamType ff_cbs_type_h265
Definition: cbs_h2645.c:1511
static int FUNC() sei(CodedBitstreamContext *ctx, RWContext *rw, H264RawSEI *current)
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:790
const uint8_t * raw_data
Definition: h2645_parse.h:45
int data_bit_start
Definition: cbs_h264.h:434
H265RawSliceHeader header
Definition: cbs_h265.h:542
H264RawSliceHeader header
Definition: cbs_h264.h:430
void ff_cbs_h264_delete_sei_message(CodedBitstreamContext *ctx, CodedBitstreamFragment *au, CodedBitstreamUnit *nal, int position)
Delete an SEI message from an access unit.
Definition: cbs_h2645.c:1586
int len
union H264RawSEIPayload::@51 payload
H2645NAL * nals
Definition: h2645_parse.h:77
mastering display properties
Definition: h264_sei.h:38
size_t data_size
Definition: cbs_h265.h:545
CodedBitstreamH2645Context common
Definition: cbs_h264.h:447
uint8_t nal_ref_idc
Definition: cbs_h264.h:41
#define av_freep(p)
void INT64 INT64 count
Definition: avisynth_c.h:766
static int cbs_h264_write_nal_unit(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit, PutBitContext *pbc)
Definition: cbs_h2645.c:1154
void INT64 start
Definition: avisynth_c.h:766
const struct CodedBitstreamType * codec
Internal codec-specific hooks.
Definition: cbs.h:178
#define cbs_h2645_replace_ps(h26n, ps_name, ps_var, id_element)
Definition: cbs_h2645.c:744
static int cbs_h2645_split_fragment(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag, int header)
Definition: cbs_h2645.c:585
H265RawVPS * vps[HEVC_MAX_VPS_COUNT]
Definition: cbs_h265.h:736
AVBufferRef * data_ref
A reference to the buffer containing data.
Definition: cbs.h:139
uint8_t nal_unit_type
Definition: cbs_h264.h:42
static int cbs_write_ue_golomb(CodedBitstreamContext *ctx, PutBitContext *pbc, const char *name, const int *subscripts, uint32_t value, uint32_t range_min, uint32_t range_max)
Definition: cbs_h2645.c:142
void ff_cbs_trace_syntax_element(CodedBitstreamContext *ctx, int position, const char *str, const int *subscripts, const char *bits, int64_t value)
Definition: cbs.c:435
uint8_t * data
Definition: cbs_h264.h:432
uint8_t payload_count
Definition: cbs_h264.h:348
static void cbs_h264_free_sei(void *unit, uint8_t *content)
Definition: cbs_h2645.c:476
size_t data_size
The number of bytes in the bitstream (including any padding bits in the final byte).
Definition: cbs.h:80
static int cbs_h2645_fragment_add_nals(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag, const H2645Packet *packet)
Definition: cbs_h2645.c:557
static void cbs_h265_free_sps(void *unit, uint8_t *content)
Definition: cbs_h2645.c:499