FFmpeg  4.4.4
cbs_vp9.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 "libavutil/avassert.h"
20 
21 #include "cbs.h"
22 #include "cbs_internal.h"
23 #include "cbs_vp9.h"
24 #include "internal.h"
25 
26 
28  int width, const char *name,
29  const int *subscripts, int32_t *write_to)
30 {
31  uint32_t magnitude;
32  int position, sign;
33  int32_t value;
34 
35  if (ctx->trace_enable)
36  position = get_bits_count(gbc);
37 
38  if (get_bits_left(gbc) < width + 1) {
39  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid signed value at "
40  "%s: bitstream ended.\n", name);
41  return AVERROR_INVALIDDATA;
42  }
43 
44  magnitude = get_bits(gbc, width);
45  sign = get_bits1(gbc);
46  value = sign ? -(int32_t)magnitude : magnitude;
47 
48  if (ctx->trace_enable) {
49  char bits[33];
50  int i;
51  for (i = 0; i < width; i++)
52  bits[i] = magnitude >> (width - i - 1) & 1 ? '1' : '0';
53  bits[i] = sign ? '1' : '0';
54  bits[i + 1] = 0;
55 
56  ff_cbs_trace_syntax_element(ctx, position, name, subscripts,
57  bits, value);
58  }
59 
60  *write_to = value;
61  return 0;
62 }
63 
65  int width, const char *name,
66  const int *subscripts, int32_t value)
67 {
68  uint32_t magnitude;
69  int sign;
70 
71  if (put_bits_left(pbc) < width + 1)
72  return AVERROR(ENOSPC);
73 
74  sign = value < 0;
75  magnitude = sign ? -value : value;
76 
77  if (ctx->trace_enable) {
78  char bits[33];
79  int i;
80  for (i = 0; i < width; i++)
81  bits[i] = magnitude >> (width - i - 1) & 1 ? '1' : '0';
82  bits[i] = sign ? '1' : '0';
83  bits[i + 1] = 0;
84 
86  name, subscripts, bits, value);
87  }
88 
89  put_bits(pbc, width, magnitude);
90  put_bits(pbc, 1, sign);
91 
92  return 0;
93 }
94 
96  uint32_t range_min, uint32_t range_max,
97  const char *name, uint32_t *write_to)
98 {
99  uint32_t value;
100  int position, i;
101  char bits[8];
102 
103  av_assert0(range_min <= range_max && range_max - range_min < sizeof(bits) - 1);
104  if (ctx->trace_enable)
105  position = get_bits_count(gbc);
106 
107  for (i = 0, value = range_min; value < range_max;) {
108  if (get_bits_left(gbc) < 1) {
109  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid increment value at "
110  "%s: bitstream ended.\n", name);
111  return AVERROR_INVALIDDATA;
112  }
113  if (get_bits1(gbc)) {
114  bits[i++] = '1';
115  ++value;
116  } else {
117  bits[i++] = '0';
118  break;
119  }
120  }
121 
122  if (ctx->trace_enable) {
123  bits[i] = 0;
125  }
126 
127  *write_to = value;
128  return 0;
129 }
130 
132  uint32_t range_min, uint32_t range_max,
133  const char *name, uint32_t value)
134 {
135  int len;
136 
137  av_assert0(range_min <= range_max && range_max - range_min < 8);
138  if (value < range_min || value > range_max) {
139  av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
140  "%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
141  name, value, range_min, range_max);
142  return AVERROR_INVALIDDATA;
143  }
144 
145  if (value == range_max)
146  len = range_max - range_min;
147  else
148  len = value - range_min + 1;
149  if (put_bits_left(pbc) < len)
150  return AVERROR(ENOSPC);
151 
152  if (ctx->trace_enable) {
153  char bits[8];
154  int i;
155  for (i = 0; i < len; i++) {
156  if (range_min + i == value)
157  bits[i] = '0';
158  else
159  bits[i] = '1';
160  }
161  bits[i] = 0;
163  name, NULL, bits, value);
164  }
165 
166  if (len > 0)
167  put_bits(pbc, len, (1 << len) - 1 - (value != range_max));
168 
169  return 0;
170 }
171 
173  int width, const char *name,
174  const int *subscripts, uint32_t *write_to)
175 {
176  uint32_t value;
177  int position, b;
178 
179  av_assert0(width % 8 == 0);
180 
181  if (ctx->trace_enable)
182  position = get_bits_count(gbc);
183 
184  if (get_bits_left(gbc) < width) {
185  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid le value at "
186  "%s: bitstream ended.\n", name);
187  return AVERROR_INVALIDDATA;
188  }
189 
190  value = 0;
191  for (b = 0; b < width; b += 8)
192  value |= get_bits(gbc, 8) << b;
193 
194  if (ctx->trace_enable) {
195  char bits[33];
196  int i;
197  for (b = 0; b < width; b += 8)
198  for (i = 0; i < 8; i++)
199  bits[b + i] = value >> (b + i) & 1 ? '1' : '0';
200  bits[b] = 0;
201 
202  ff_cbs_trace_syntax_element(ctx, position, name, subscripts,
203  bits, value);
204  }
205 
206  *write_to = value;
207  return 0;
208 }
209 
211  int width, const char *name,
212  const int *subscripts, uint32_t value)
213 {
214  int b;
215 
216  av_assert0(width % 8 == 0);
217 
218  if (put_bits_left(pbc) < width)
219  return AVERROR(ENOSPC);
220 
221  if (ctx->trace_enable) {
222  char bits[33];
223  int i;
224  for (b = 0; b < width; b += 8)
225  for (i = 0; i < 8; i++)
226  bits[b + i] = value >> (b + i) & 1 ? '1' : '0';
227  bits[b] = 0;
228 
230  name, subscripts, bits, value);
231  }
232 
233  for (b = 0; b < width; b += 8)
234  put_bits(pbc, 8, value >> b & 0xff);
235 
236  return 0;
237 }
238 
239 #define HEADER(name) do { \
240  ff_cbs_trace_header(ctx, name); \
241  } while (0)
242 
243 #define CHECK(call) do { \
244  err = (call); \
245  if (err < 0) \
246  return err; \
247  } while (0)
248 
249 #define FUNC_NAME(rw, codec, name) cbs_ ## codec ## _ ## rw ## _ ## name
250 #define FUNC_VP9(rw, name) FUNC_NAME(rw, vp9, name)
251 #define FUNC(name) FUNC_VP9(READWRITE, name)
252 
253 #define SUBSCRIPTS(subs, ...) (subs > 0 ? ((int[subs + 1]){ subs, __VA_ARGS__ }) : NULL)
254 
255 #define f(width, name) \
256  xf(width, name, current->name, 0, )
257 #define s(width, name) \
258  xs(width, name, current->name, 0, )
259 #define fs(width, name, subs, ...) \
260  xf(width, name, current->name, subs, __VA_ARGS__)
261 #define ss(width, name, subs, ...) \
262  xs(width, name, current->name, subs, __VA_ARGS__)
263 
264 #define READ
265 #define READWRITE read
266 #define RWContext GetBitContext
267 
268 #define xf(width, name, var, subs, ...) do { \
269  uint32_t value; \
270  CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \
271  SUBSCRIPTS(subs, __VA_ARGS__), \
272  &value, 0, (1 << width) - 1)); \
273  var = value; \
274  } while (0)
275 #define xs(width, name, var, subs, ...) do { \
276  int32_t value; \
277  CHECK(cbs_vp9_read_s(ctx, rw, width, #name, \
278  SUBSCRIPTS(subs, __VA_ARGS__), &value)); \
279  var = value; \
280  } while (0)
281 
282 
283 #define increment(name, min, max) do { \
284  uint32_t value; \
285  CHECK(cbs_vp9_read_increment(ctx, rw, min, max, #name, &value)); \
286  current->name = value; \
287  } while (0)
288 
289 #define fle(width, name, subs, ...) do { \
290  CHECK(cbs_vp9_read_le(ctx, rw, width, #name, \
291  SUBSCRIPTS(subs, __VA_ARGS__), &current->name)); \
292  } while (0)
293 
294 #define delta_q(name) do { \
295  uint8_t delta_coded; \
296  int8_t delta_q; \
297  xf(1, name.delta_coded, delta_coded, 0, ); \
298  if (delta_coded) \
299  xs(4, name.delta_q, delta_q, 0, ); \
300  else \
301  delta_q = 0; \
302  current->name = delta_q; \
303  } while (0)
304 
305 #define prob(name, subs, ...) do { \
306  uint8_t prob_coded; \
307  uint8_t prob; \
308  xf(1, name.prob_coded, prob_coded, subs, __VA_ARGS__); \
309  if (prob_coded) \
310  xf(8, name.prob, prob, subs, __VA_ARGS__); \
311  else \
312  prob = 255; \
313  current->name = prob; \
314  } while (0)
315 
316 #define fixed(width, name, value) do { \
317  av_unused uint32_t fixed_value; \
318  CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \
319  0, &fixed_value, value, value)); \
320  } while (0)
321 
322 #define infer(name, value) do { \
323  current->name = value; \
324  } while (0)
325 
326 #define byte_alignment(rw) (get_bits_count(rw) % 8)
327 
328 #include "cbs_vp9_syntax_template.c"
329 
330 #undef READ
331 #undef READWRITE
332 #undef RWContext
333 #undef xf
334 #undef xs
335 #undef increment
336 #undef fle
337 #undef delta_q
338 #undef prob
339 #undef fixed
340 #undef infer
341 #undef byte_alignment
342 
343 
344 #define WRITE
345 #define READWRITE write
346 #define RWContext PutBitContext
347 
348 #define xf(width, name, var, subs, ...) do { \
349  CHECK(ff_cbs_write_unsigned(ctx, rw, width, #name, \
350  SUBSCRIPTS(subs, __VA_ARGS__), \
351  var, 0, (1 << width) - 1)); \
352  } while (0)
353 #define xs(width, name, var, subs, ...) do { \
354  CHECK(cbs_vp9_write_s(ctx, rw, width, #name, \
355  SUBSCRIPTS(subs, __VA_ARGS__), var)); \
356  } while (0)
357 
358 #define increment(name, min, max) do { \
359  CHECK(cbs_vp9_write_increment(ctx, rw, min, max, #name, current->name)); \
360  } while (0)
361 
362 #define fle(width, name, subs, ...) do { \
363  CHECK(cbs_vp9_write_le(ctx, rw, width, #name, \
364  SUBSCRIPTS(subs, __VA_ARGS__), current->name)); \
365  } while (0)
366 
367 #define delta_q(name) do { \
368  xf(1, name.delta_coded, !!current->name, 0, ); \
369  if (current->name) \
370  xs(4, name.delta_q, current->name, 0, ); \
371  } while (0)
372 
373 #define prob(name, subs, ...) do { \
374  xf(1, name.prob_coded, current->name != 255, subs, __VA_ARGS__); \
375  if (current->name != 255) \
376  xf(8, name.prob, current->name, subs, __VA_ARGS__); \
377  } while (0)
378 
379 #define fixed(width, name, value) do { \
380  CHECK(ff_cbs_write_unsigned(ctx, rw, width, #name, \
381  0, value, value, value)); \
382  } while (0)
383 
384 #define infer(name, value) do { \
385  if (current->name != (value)) { \
386  av_log(ctx->log_ctx, AV_LOG_WARNING, "Warning: " \
387  "%s does not match inferred value: " \
388  "%"PRId64", but should be %"PRId64".\n", \
389  #name, (int64_t)current->name, (int64_t)(value)); \
390  } \
391  } while (0)
392 
393 #define byte_alignment(rw) (put_bits_count(rw) % 8)
394 
395 #include "cbs_vp9_syntax_template.c"
396 
397 #undef WRITE
398 #undef READWRITE
399 #undef RWContext
400 #undef xf
401 #undef xs
402 #undef increment
403 #undef fle
404 #undef delta_q
405 #undef prob
406 #undef fixed
407 #undef infer
408 #undef byte_alignment
409 
410 
413  int header)
414 {
415  uint8_t superframe_header;
416  int err;
417 
418  if (frag->data_size == 0)
419  return AVERROR_INVALIDDATA;
420 
421  // Last byte in the packet.
422  superframe_header = frag->data[frag->data_size - 1];
423 
424  if ((superframe_header & 0xe0) == 0xc0) {
426  GetBitContext gbc;
427  size_t index_size, pos;
428  int i;
429 
430  index_size = 2 + (((superframe_header & 0x18) >> 3) + 1) *
431  ((superframe_header & 0x07) + 1);
432 
433  if (index_size > frag->data_size)
434  return AVERROR_INVALIDDATA;
435 
436  err = init_get_bits(&gbc, frag->data + frag->data_size - index_size,
437  8 * index_size);
438  if (err < 0)
439  return err;
440 
441  err = cbs_vp9_read_superframe_index(ctx, &gbc, &sfi);
442  if (err < 0)
443  return err;
444 
445  pos = 0;
446  for (i = 0; i <= sfi.frames_in_superframe_minus_1; i++) {
447  if (pos + sfi.frame_sizes[i] + index_size > frag->data_size) {
448  av_log(ctx->log_ctx, AV_LOG_ERROR, "Frame %d too large "
449  "in superframe: %"PRIu32" bytes.\n",
450  i, sfi.frame_sizes[i]);
451  return AVERROR_INVALIDDATA;
452  }
453 
454  err = ff_cbs_insert_unit_data(frag, -1, 0,
455  frag->data + pos,
456  sfi.frame_sizes[i],
457  frag->data_ref);
458  if (err < 0)
459  return err;
460 
461  pos += sfi.frame_sizes[i];
462  }
463  if (pos + index_size != frag->data_size) {
464  av_log(ctx->log_ctx, AV_LOG_WARNING, "Extra padding at "
465  "end of superframe: %"SIZE_SPECIFIER" bytes.\n",
466  frag->data_size - (pos + index_size));
467  }
468 
469  return 0;
470 
471  } else {
472  err = ff_cbs_insert_unit_data(frag, -1, 0,
473  frag->data, frag->data_size,
474  frag->data_ref);
475  if (err < 0)
476  return err;
477  }
478 
479  return 0;
480 }
481 
483  CodedBitstreamUnit *unit)
484 {
486  GetBitContext gbc;
487  int err, pos;
488 
489  err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
490  if (err < 0)
491  return err;
492 
493  err = ff_cbs_alloc_unit_content2(ctx, unit);
494  if (err < 0)
495  return err;
496  frame = unit->content;
497 
498  err = cbs_vp9_read_frame(ctx, &gbc, frame);
499  if (err < 0)
500  return err;
501 
502  pos = get_bits_count(&gbc);
503  av_assert0(pos % 8 == 0);
504  pos /= 8;
505  av_assert0(pos <= unit->data_size);
506 
507  if (pos == unit->data_size) {
508  // No data (e.g. a show-existing-frame frame).
509  } else {
510  frame->data_ref = av_buffer_ref(unit->data_ref);
511  if (!frame->data_ref)
512  return AVERROR(ENOMEM);
513 
514  frame->data = unit->data + pos;
515  frame->data_size = unit->data_size - pos;
516  }
517 
518  return 0;
519 }
520 
522  CodedBitstreamUnit *unit,
523  PutBitContext *pbc)
524 {
525  VP9RawFrame *frame = unit->content;
526  int err;
527 
528  err = cbs_vp9_write_frame(ctx, pbc, frame);
529  if (err < 0)
530  return err;
531 
532  // Frame must be byte-aligned.
533  av_assert0(put_bits_count(pbc) % 8 == 0);
534 
535  if (frame->data) {
536  if (frame->data_size > put_bits_left(pbc) / 8)
537  return AVERROR(ENOSPC);
538 
539  flush_put_bits(pbc);
540  memcpy(put_bits_ptr(pbc), frame->data, frame->data_size);
541  skip_put_bytes(pbc, frame->data_size);
542  }
543 
544  return 0;
545 }
546 
549 {
550  int err;
551 
552  if (frag->nb_units == 1) {
553  // Output is just the content of the single frame.
554 
555  CodedBitstreamUnit *frame = &frag->units[0];
556 
557  frag->data_ref = av_buffer_ref(frame->data_ref);
558  if (!frag->data_ref)
559  return AVERROR(ENOMEM);
560 
561  frag->data = frame->data;
562  frag->data_size = frame->data_size;
563 
564  } else {
565  // Build superframe out of frames.
566 
568  PutBitContext pbc;
569  AVBufferRef *ref;
570  uint8_t *data;
571  size_t size, max, pos;
572  int i, size_len;
573 
574  if (frag->nb_units > 8) {
575  av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many frames to "
576  "make superframe: %d.\n", frag->nb_units);
577  return AVERROR(EINVAL);
578  }
579 
580  max = 0;
581  for (i = 0; i < frag->nb_units; i++)
582  if (max < frag->units[i].data_size)
583  max = frag->units[i].data_size;
584 
585  if (max < 2)
586  size_len = 1;
587  else
588  size_len = av_log2(max) / 8 + 1;
589  av_assert0(size_len <= 4);
590 
592  sfi.bytes_per_framesize_minus_1 = size_len - 1;
593  sfi.frames_in_superframe_minus_1 = frag->nb_units - 1;
594 
595  size = 2;
596  for (i = 0; i < frag->nb_units; i++) {
597  size += size_len + frag->units[i].data_size;
598  sfi.frame_sizes[i] = frag->units[i].data_size;
599  }
600 
602  if (!ref)
603  return AVERROR(ENOMEM);
604  data = ref->data;
605  memset(data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
606 
607  pos = 0;
608  for (i = 0; i < frag->nb_units; i++) {
609  av_assert0(size - pos > frag->units[i].data_size);
610  memcpy(data + pos, frag->units[i].data,
611  frag->units[i].data_size);
612  pos += frag->units[i].data_size;
613  }
614  av_assert0(size - pos == 2 + frag->nb_units * size_len);
615 
616  init_put_bits(&pbc, data + pos, size - pos);
617 
618  err = cbs_vp9_write_superframe_index(ctx, &pbc, &sfi);
619  if (err < 0) {
620  av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to write "
621  "superframe index.\n");
623  return err;
624  }
625 
626  av_assert0(put_bits_left(&pbc) == 0);
627  flush_put_bits(&pbc);
628 
629  frag->data_ref = ref;
630  frag->data = data;
631  frag->data_size = size;
632  }
633 
634  return 0;
635 }
636 
638 {
640 
641  memset(vp9->ref, 0, sizeof(vp9->ref));
642 }
643 
647 };
648 
651 
652  .priv_data_size = sizeof(CodedBitstreamVP9Context),
653 
654  .unit_types = cbs_vp9_unit_types,
655 
656  .split_fragment = &cbs_vp9_split_fragment,
657  .read_unit = &cbs_vp9_read_unit,
658  .write_unit = &cbs_vp9_write_unit,
659 
660  .flush = &cbs_vp9_flush,
661 
662  .assemble_fragment = &cbs_vp9_assemble_fragment,
663 };
static void flush(AVCodecContext *avctx)
uint8_t
int32_t
simple assert() macros that are a bit more flexible than ISO C assert().
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int ff_cbs_insert_unit_data(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:773
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:453
int ff_cbs_alloc_unit_content2(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit)
Allocate a new internal content buffer matching the type of the unit.
Definition: cbs.c:869
#define CBS_UNIT_TYPE_END_OF_LIST
Definition: cbs_internal.h:201
#define CBS_UNIT_TYPE_INTERNAL_REF(type, structure, ref_field)
Definition: cbs_internal.h:186
static int cbs_vp9_read_s(CodedBitstreamContext *ctx, GetBitContext *gbc, int width, const char *name, const int *subscripts, int32_t *write_to)
Definition: cbs_vp9.c:27
static int cbs_vp9_read_unit(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit)
Definition: cbs_vp9.c:482
static int cbs_vp9_write_increment(CodedBitstreamContext *ctx, PutBitContext *pbc, uint32_t range_min, uint32_t range_max, const char *name, uint32_t value)
Definition: cbs_vp9.c:131
static int cbs_vp9_assemble_fragment(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag)
Definition: cbs_vp9.c:547
static const CodedBitstreamUnitTypeDescriptor cbs_vp9_unit_types[]
Definition: cbs_vp9.c:644
static void cbs_vp9_flush(CodedBitstreamContext *ctx)
Definition: cbs_vp9.c:637
static int cbs_vp9_read_increment(CodedBitstreamContext *ctx, GetBitContext *gbc, uint32_t range_min, uint32_t range_max, const char *name, uint32_t *write_to)
Definition: cbs_vp9.c:95
const CodedBitstreamType ff_cbs_type_vp9
Definition: cbs_vp9.c:649
static int cbs_vp9_read_le(CodedBitstreamContext *ctx, GetBitContext *gbc, int width, const char *name, const int *subscripts, uint32_t *write_to)
Definition: cbs_vp9.c:172
static int cbs_vp9_split_fragment(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag, int header)
Definition: cbs_vp9.c:411
static int cbs_vp9_write_le(CodedBitstreamContext *ctx, PutBitContext *pbc, int width, const char *name, const int *subscripts, uint32_t value)
Definition: cbs_vp9.c:210
static int cbs_vp9_write_s(CodedBitstreamContext *ctx, PutBitContext *pbc, int width, const char *name, const int *subscripts, int32_t value)
Definition: cbs_vp9.c:64
static int cbs_vp9_write_unit(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit, PutBitContext *pbc)
Definition: cbs_vp9.c:521
@ VP9_SUPERFRAME_MARKER
Definition: cbs_vp9.h:79
#define NULL
Definition: coverity.c:32
#define max(a, b)
Definition: cuda_runtime.h:33
static AVFrame * frame
double value
Definition: eval.c:98
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:849
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:498
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:219
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:659
@ AV_CODEC_ID_VP9
Definition: codec_id.h:217
#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
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
AVBufferRef * av_buffer_alloc(buffer_size_t size)
Allocate an AVBuffer of the given size using av_malloc().
Definition: buffer.c:67
AVBufferRef * av_buffer_ref(AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:93
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
int i
Definition: input.c:407
#define av_log2
Definition: intmath.h:83
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:218
common internal API header
#define SIZE_SPECIFIER
Definition: internal.h:193
const char data[16]
Definition: mxf.c:142
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
Definition: put_bits.h:57
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:342
static int put_bits_count(PutBitContext *s)
Definition: put_bits.h:76
static int put_bits_left(PutBitContext *s)
Definition: put_bits.h:102
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:110
static void skip_put_bytes(PutBitContext *s, int n)
Skip the given number of bytes.
Definition: put_bits.h:351
const char * name
Definition: qsvenc.c:46
static const uint8_t header[24]
Definition: sdr2.c:67
unsigned int pos
Definition: spdifenc.c:412
A reference to a data buffer.
Definition: buffer.h:84
void * priv_data
Format private data.
Definition: avformat.h:1260
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:332
Context structure for coded bitstream operations.
Definition: cbs.h:170
Coded bitstream fragment structure, combining one or more units.
Definition: cbs.h:118
CodedBitstreamUnit * units
Pointer to an array of units of length nb_units_allocated.
Definition: cbs.h:164
int nb_units
Number of units in this fragment.
Definition: cbs.h:149
size_t data_size
The number of bytes in the bitstream.
Definition: cbs.h:131
uint8_t * data
Pointer to the bitstream form of this fragment.
Definition: cbs.h:124
AVBufferRef * data_ref
A reference to the buffer containing data.
Definition: cbs.h:141
enum AVCodecID codec_id
Definition: cbs_internal.h:87
Coded bitstream unit structure.
Definition: cbs.h:66
void * content
Pointer to the decomposed form of this unit.
Definition: cbs.h:103
uint8_t * data
Pointer to the directly-parsable bitstream form of this unit.
Definition: cbs.h:77
size_t data_size
The number of bytes in the bitstream (including any padding bits in the final byte).
Definition: cbs.h:82
AVBufferRef * data_ref
A reference to the buffer containing data.
Definition: cbs.h:94
VP9ReferenceFrameState ref[VP9_NUM_REF_FRAMES]
Definition: cbs_vp9.h:209
uint8_t superframe_marker
Definition: cbs_vp9.h:173
uint8_t bytes_per_framesize_minus_1
Definition: cbs_vp9.h:174
uint32_t frame_sizes[VP9_MAX_FRAMES_IN_SUPERFRAME]
Definition: cbs_vp9.h:176
uint8_t frames_in_superframe_minus_1
Definition: cbs_vp9.h:175
#define av_log(a,...)
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
AVFormatContext * ctx
Definition: movenc.c:48
#define width
int size
const char * b
Definition: vf_curves.c:118
int len
uint8_t bits
Definition: vp3data.h:141