FFmpeg  4.3.6
cbs_av1.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 #include "libavutil/pixfmt.h"
21 
22 #include "cbs.h"
23 #include "cbs_internal.h"
24 #include "cbs_av1.h"
25 #include "internal.h"
26 
27 
29  const char *name, uint32_t *write_to,
30  uint32_t range_min, uint32_t range_max)
31 {
32  uint32_t zeroes, bits_value, value;
33  int position;
34 
35  if (ctx->trace_enable)
36  position = get_bits_count(gbc);
37 
38  zeroes = 0;
39  while (1) {
40  if (get_bits_left(gbc) < 1) {
41  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid uvlc code at "
42  "%s: bitstream ended.\n", name);
43  return AVERROR_INVALIDDATA;
44  }
45 
46  if (get_bits1(gbc))
47  break;
48  ++zeroes;
49  }
50 
51  if (zeroes >= 32) {
52  value = MAX_UINT_BITS(32);
53  } else {
54  if (get_bits_left(gbc) < zeroes) {
55  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid uvlc code at "
56  "%s: bitstream ended.\n", name);
57  return AVERROR_INVALIDDATA;
58  }
59 
60  bits_value = get_bits_long(gbc, zeroes);
61  value = bits_value + (UINT32_C(1) << zeroes) - 1;
62  }
63 
64  if (ctx->trace_enable) {
65  char bits[65];
66  int i, j, k;
67 
68  if (zeroes >= 32) {
69  while (zeroes > 32) {
70  k = FFMIN(zeroes - 32, 32);
71  for (i = 0; i < k; i++)
72  bits[i] = '0';
73  bits[i] = 0;
74  ff_cbs_trace_syntax_element(ctx, position, name,
75  NULL, bits, 0);
76  zeroes -= k;
77  position += k;
78  }
79  }
80 
81  for (i = 0; i < zeroes; i++)
82  bits[i] = '0';
83  bits[i++] = '1';
84 
85  if (zeroes < 32) {
86  for (j = 0; j < zeroes; j++)
87  bits[i++] = (bits_value >> (zeroes - j - 1) & 1) ? '1' : '0';
88  }
89 
90  bits[i] = 0;
91  ff_cbs_trace_syntax_element(ctx, position, name,
92  NULL, bits, value);
93  }
94 
95  if (value < range_min || value > range_max) {
96  av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
97  "%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
98  name, value, range_min, range_max);
99  return AVERROR_INVALIDDATA;
100  }
101 
102  *write_to = value;
103  return 0;
104 }
105 
107  const char *name, uint32_t value,
108  uint32_t range_min, uint32_t range_max)
109 {
110  uint32_t v;
111  int position, zeroes;
112 
113  if (value < range_min || value > range_max) {
114  av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
115  "%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
116  name, value, range_min, range_max);
117  return AVERROR_INVALIDDATA;
118  }
119 
120  if (ctx->trace_enable)
121  position = put_bits_count(pbc);
122 
123  if (value == 0) {
124  zeroes = 0;
125  put_bits(pbc, 1, 1);
126  } else {
127  zeroes = av_log2(value + 1);
128  v = value - (1U << zeroes) + 1;
129  put_bits(pbc, zeroes, 0);
130  put_bits(pbc, 1, 1);
131  put_bits(pbc, zeroes, v);
132  }
133 
134  if (ctx->trace_enable) {
135  char bits[65];
136  int i, j;
137  i = 0;
138  for (j = 0; j < zeroes; j++)
139  bits[i++] = '0';
140  bits[i++] = '1';
141  for (j = 0; j < zeroes; j++)
142  bits[i++] = (v >> (zeroes - j - 1) & 1) ? '1' : '0';
143  bits[i++] = 0;
144  ff_cbs_trace_syntax_element(ctx, position, name, NULL,
145  bits, value);
146  }
147 
148  return 0;
149 }
150 
152  const char *name, uint64_t *write_to)
153 {
154  uint64_t value;
155  int position, err, i;
156 
157  if (ctx->trace_enable)
158  position = get_bits_count(gbc);
159 
160  value = 0;
161  for (i = 0; i < 8; i++) {
162  int subscript[2] = { 1, i };
163  uint32_t byte;
164  err = ff_cbs_read_unsigned(ctx, gbc, 8, "leb128_byte[i]", subscript,
165  &byte, 0x00, 0xff);
166  if (err < 0)
167  return err;
168 
169  value |= (uint64_t)(byte & 0x7f) << (i * 7);
170  if (!(byte & 0x80))
171  break;
172  }
173 
174  if (value > UINT32_MAX)
175  return AVERROR_INVALIDDATA;
176 
177  if (ctx->trace_enable)
178  ff_cbs_trace_syntax_element(ctx, position, name, NULL, "", value);
179 
180  *write_to = value;
181  return 0;
182 }
183 
185  const char *name, uint64_t value)
186 {
187  int position, err, len, i;
188  uint8_t byte;
189 
190  len = (av_log2(value) + 7) / 7;
191 
192  if (ctx->trace_enable)
193  position = put_bits_count(pbc);
194 
195  for (i = 0; i < len; i++) {
196  int subscript[2] = { 1, i };
197 
198  byte = value >> (7 * i) & 0x7f;
199  if (i < len - 1)
200  byte |= 0x80;
201 
202  err = ff_cbs_write_unsigned(ctx, pbc, 8, "leb128_byte[i]", subscript,
203  byte, 0x00, 0xff);
204  if (err < 0)
205  return err;
206  }
207 
208  if (ctx->trace_enable)
209  ff_cbs_trace_syntax_element(ctx, position, name, NULL, "", value);
210 
211  return 0;
212 }
213 
215  uint32_t n, const char *name,
216  const int *subscripts, uint32_t *write_to)
217 {
218  uint32_t m, v, extra_bit, value;
219  int position, w;
220 
221  av_assert0(n > 0);
222 
223  if (ctx->trace_enable)
224  position = get_bits_count(gbc);
225 
226  w = av_log2(n) + 1;
227  m = (1 << w) - n;
228 
229  if (get_bits_left(gbc) < w) {
230  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid non-symmetric value at "
231  "%s: bitstream ended.\n", name);
232  return AVERROR_INVALIDDATA;
233  }
234 
235  if (w - 1 > 0)
236  v = get_bits(gbc, w - 1);
237  else
238  v = 0;
239 
240  if (v < m) {
241  value = v;
242  } else {
243  extra_bit = get_bits1(gbc);
244  value = (v << 1) - m + extra_bit;
245  }
246 
247  if (ctx->trace_enable) {
248  char bits[33];
249  int i;
250  for (i = 0; i < w - 1; i++)
251  bits[i] = (v >> i & 1) ? '1' : '0';
252  if (v >= m)
253  bits[i++] = extra_bit ? '1' : '0';
254  bits[i] = 0;
255 
256  ff_cbs_trace_syntax_element(ctx, position,
257  name, subscripts, bits, value);
258  }
259 
260  *write_to = value;
261  return 0;
262 }
263 
265  uint32_t n, const char *name,
266  const int *subscripts, uint32_t value)
267 {
268  uint32_t w, m, v, extra_bit;
269  int position;
270 
271  if (value > n) {
272  av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
273  "%"PRIu32", but must be in [0,%"PRIu32"].\n",
274  name, value, n);
275  return AVERROR_INVALIDDATA;
276  }
277 
278  if (ctx->trace_enable)
279  position = put_bits_count(pbc);
280 
281  w = av_log2(n) + 1;
282  m = (1 << w) - n;
283 
284  if (put_bits_left(pbc) < w)
285  return AVERROR(ENOSPC);
286 
287  if (value < m) {
288  v = value;
289  put_bits(pbc, w - 1, v);
290  } else {
291  v = m + ((value - m) >> 1);
292  extra_bit = (value - m) & 1;
293  put_bits(pbc, w - 1, v);
294  put_bits(pbc, 1, extra_bit);
295  }
296 
297  if (ctx->trace_enable) {
298  char bits[33];
299  int i;
300  for (i = 0; i < w - 1; i++)
301  bits[i] = (v >> i & 1) ? '1' : '0';
302  if (value >= m)
303  bits[i++] = extra_bit ? '1' : '0';
304  bits[i] = 0;
305 
306  ff_cbs_trace_syntax_element(ctx, position,
307  name, subscripts, bits, value);
308  }
309 
310  return 0;
311 }
312 
314  uint32_t range_min, uint32_t range_max,
315  const char *name, uint32_t *write_to)
316 {
317  uint32_t value;
318  int position, i;
319  char bits[33];
320 
321  av_assert0(range_min <= range_max && range_max - range_min < sizeof(bits) - 1);
322  if (ctx->trace_enable)
323  position = get_bits_count(gbc);
324 
325  for (i = 0, value = range_min; value < range_max;) {
326  if (get_bits_left(gbc) < 1) {
327  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid increment value at "
328  "%s: bitstream ended.\n", name);
329  return AVERROR_INVALIDDATA;
330  }
331  if (get_bits1(gbc)) {
332  bits[i++] = '1';
333  ++value;
334  } else {
335  bits[i++] = '0';
336  break;
337  }
338  }
339 
340  if (ctx->trace_enable) {
341  bits[i] = 0;
342  ff_cbs_trace_syntax_element(ctx, position,
343  name, NULL, bits, value);
344  }
345 
346  *write_to = value;
347  return 0;
348 }
349 
351  uint32_t range_min, uint32_t range_max,
352  const char *name, uint32_t value)
353 {
354  int len;
355 
356  av_assert0(range_min <= range_max && range_max - range_min < 32);
357  if (value < range_min || value > range_max) {
358  av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
359  "%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
360  name, value, range_min, range_max);
361  return AVERROR_INVALIDDATA;
362  }
363 
364  if (value == range_max)
365  len = range_max - range_min;
366  else
367  len = value - range_min + 1;
368  if (put_bits_left(pbc) < len)
369  return AVERROR(ENOSPC);
370 
371  if (ctx->trace_enable) {
372  char bits[33];
373  int i;
374  for (i = 0; i < len; i++) {
375  if (range_min + i == value)
376  bits[i] = '0';
377  else
378  bits[i] = '1';
379  }
380  bits[i] = 0;
382  name, NULL, bits, value);
383  }
384 
385  if (len > 0)
386  put_bits(pbc, len, (1 << len) - 1 - (value != range_max));
387 
388  return 0;
389 }
390 
392  uint32_t range_max, const char *name,
393  const int *subscripts, uint32_t *write_to)
394 {
395  uint32_t value;
396  int position, err;
397  uint32_t max_len, len, range_offset, range_bits;
398 
399  if (ctx->trace_enable)
400  position = get_bits_count(gbc);
401 
402  av_assert0(range_max > 0);
403  max_len = av_log2(range_max - 1) - 3;
404 
405  err = cbs_av1_read_increment(ctx, gbc, 0, max_len,
406  "subexp_more_bits", &len);
407  if (err < 0)
408  return err;
409 
410  if (len) {
411  range_bits = 2 + len;
412  range_offset = 1 << range_bits;
413  } else {
414  range_bits = 3;
415  range_offset = 0;
416  }
417 
418  if (len < max_len) {
419  err = ff_cbs_read_unsigned(ctx, gbc, range_bits,
420  "subexp_bits", NULL, &value,
421  0, MAX_UINT_BITS(range_bits));
422  if (err < 0)
423  return err;
424 
425  } else {
426  err = cbs_av1_read_ns(ctx, gbc, range_max - range_offset,
427  "subexp_final_bits", NULL, &value);
428  if (err < 0)
429  return err;
430  }
431  value += range_offset;
432 
433  if (ctx->trace_enable)
434  ff_cbs_trace_syntax_element(ctx, position,
435  name, subscripts, "", value);
436 
437  *write_to = value;
438  return err;
439 }
440 
442  uint32_t range_max, const char *name,
443  const int *subscripts, uint32_t value)
444 {
445  int position, err;
446  uint32_t max_len, len, range_offset, range_bits;
447 
448  if (value > range_max) {
449  av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
450  "%"PRIu32", but must be in [0,%"PRIu32"].\n",
451  name, value, range_max);
452  return AVERROR_INVALIDDATA;
453  }
454 
455  if (ctx->trace_enable)
456  position = put_bits_count(pbc);
457 
458  av_assert0(range_max > 0);
459  max_len = av_log2(range_max - 1) - 3;
460 
461  if (value < 8) {
462  range_bits = 3;
463  range_offset = 0;
464  len = 0;
465  } else {
466  range_bits = av_log2(value);
467  len = range_bits - 2;
468  if (len > max_len) {
469  // The top bin is combined with the one below it.
470  av_assert0(len == max_len + 1);
471  --range_bits;
472  len = max_len;
473  }
474  range_offset = 1 << range_bits;
475  }
476 
477  err = cbs_av1_write_increment(ctx, pbc, 0, max_len,
478  "subexp_more_bits", len);
479  if (err < 0)
480  return err;
481 
482  if (len < max_len) {
483  err = ff_cbs_write_unsigned(ctx, pbc, range_bits,
484  "subexp_bits", NULL,
485  value - range_offset,
486  0, MAX_UINT_BITS(range_bits));
487  if (err < 0)
488  return err;
489 
490  } else {
491  err = cbs_av1_write_ns(ctx, pbc, range_max - range_offset,
492  "subexp_final_bits", NULL,
493  value - range_offset);
494  if (err < 0)
495  return err;
496  }
497 
498  if (ctx->trace_enable)
499  ff_cbs_trace_syntax_element(ctx, position,
500  name, subscripts, "", value);
501 
502  return err;
503 }
504 
505 
506 static int cbs_av1_tile_log2(int blksize, int target)
507 {
508  int k;
509  for (k = 0; (blksize << k) < target; k++);
510  return k;
511 }
512 
514  unsigned int a, unsigned int b)
515 {
516  unsigned int diff, m;
517  if (!seq->enable_order_hint)
518  return 0;
519  diff = a - b;
520  m = 1 << seq->order_hint_bits_minus_1;
521  diff = (diff & (m - 1)) - (diff & m);
522  return diff;
523 }
524 
526 {
527  GetBitContext tmp = *gbc;
528  size_t size = 0;
529  for (int i = 0; get_bits_left(&tmp) >= 8; i++) {
530  if (get_bits(&tmp, 8))
531  size = i;
532  }
533  return size;
534 }
535 
536 
537 #define HEADER(name) do { \
538  ff_cbs_trace_header(ctx, name); \
539  } while (0)
540 
541 #define CHECK(call) do { \
542  err = (call); \
543  if (err < 0) \
544  return err; \
545  } while (0)
546 
547 #define FUNC_NAME(rw, codec, name) cbs_ ## codec ## _ ## rw ## _ ## name
548 #define FUNC_AV1(rw, name) FUNC_NAME(rw, av1, name)
549 #define FUNC(name) FUNC_AV1(READWRITE, name)
550 
551 #define SUBSCRIPTS(subs, ...) (subs > 0 ? ((int[subs + 1]){ subs, __VA_ARGS__ }) : NULL)
552 
553 #define fb(width, name) \
554  xf(width, name, current->name, 0, MAX_UINT_BITS(width), 0, )
555 #define fc(width, name, range_min, range_max) \
556  xf(width, name, current->name, range_min, range_max, 0, )
557 #define flag(name) fb(1, name)
558 #define su(width, name) \
559  xsu(width, name, current->name, 0, )
560 
561 #define fbs(width, name, subs, ...) \
562  xf(width, name, current->name, 0, MAX_UINT_BITS(width), subs, __VA_ARGS__)
563 #define fcs(width, name, range_min, range_max, subs, ...) \
564  xf(width, name, current->name, range_min, range_max, subs, __VA_ARGS__)
565 #define flags(name, subs, ...) \
566  xf(1, name, current->name, 0, 1, subs, __VA_ARGS__)
567 #define sus(width, name, subs, ...) \
568  xsu(width, name, current->name, subs, __VA_ARGS__)
569 
570 #define fixed(width, name, value) do { \
571  av_unused uint32_t fixed_value = value; \
572  xf(width, name, fixed_value, value, value, 0, ); \
573  } while (0)
574 
575 
576 #define READ
577 #define READWRITE read
578 #define RWContext GetBitContext
579 
580 #define xf(width, name, var, range_min, range_max, subs, ...) do { \
581  uint32_t value; \
582  CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \
583  SUBSCRIPTS(subs, __VA_ARGS__), \
584  &value, range_min, range_max)); \
585  var = value; \
586  } while (0)
587 
588 #define xsu(width, name, var, subs, ...) do { \
589  int32_t value; \
590  CHECK(ff_cbs_read_signed(ctx, rw, width, #name, \
591  SUBSCRIPTS(subs, __VA_ARGS__), &value, \
592  MIN_INT_BITS(width), \
593  MAX_INT_BITS(width))); \
594  var = value; \
595  } while (0)
596 
597 #define uvlc(name, range_min, range_max) do { \
598  uint32_t value; \
599  CHECK(cbs_av1_read_uvlc(ctx, rw, #name, \
600  &value, range_min, range_max)); \
601  current->name = value; \
602  } while (0)
603 
604 #define ns(max_value, name, subs, ...) do { \
605  uint32_t value; \
606  CHECK(cbs_av1_read_ns(ctx, rw, max_value, #name, \
607  SUBSCRIPTS(subs, __VA_ARGS__), &value)); \
608  current->name = value; \
609  } while (0)
610 
611 #define increment(name, min, max) do { \
612  uint32_t value; \
613  CHECK(cbs_av1_read_increment(ctx, rw, min, max, #name, &value)); \
614  current->name = value; \
615  } while (0)
616 
617 #define subexp(name, max, subs, ...) do { \
618  uint32_t value; \
619  CHECK(cbs_av1_read_subexp(ctx, rw, max, #name, \
620  SUBSCRIPTS(subs, __VA_ARGS__), &value)); \
621  current->name = value; \
622  } while (0)
623 
624 #define delta_q(name) do { \
625  uint8_t delta_coded; \
626  int8_t delta_q; \
627  xf(1, name.delta_coded, delta_coded, 0, 1, 0, ); \
628  if (delta_coded) \
629  xsu(1 + 6, name.delta_q, delta_q, 0, ); \
630  else \
631  delta_q = 0; \
632  current->name = delta_q; \
633  } while (0)
634 
635 #define leb128(name) do { \
636  uint64_t value; \
637  CHECK(cbs_av1_read_leb128(ctx, rw, #name, &value)); \
638  current->name = value; \
639  } while (0)
640 
641 #define infer(name, value) do { \
642  current->name = value; \
643  } while (0)
644 
645 #define byte_alignment(rw) (get_bits_count(rw) % 8)
646 
647 #include "cbs_av1_syntax_template.c"
648 
649 #undef READ
650 #undef READWRITE
651 #undef RWContext
652 #undef xf
653 #undef xsu
654 #undef uvlc
655 #undef ns
656 #undef increment
657 #undef subexp
658 #undef delta_q
659 #undef leb128
660 #undef infer
661 #undef byte_alignment
662 
663 
664 #define WRITE
665 #define READWRITE write
666 #define RWContext PutBitContext
667 
668 #define xf(width, name, var, range_min, range_max, subs, ...) do { \
669  CHECK(ff_cbs_write_unsigned(ctx, rw, width, #name, \
670  SUBSCRIPTS(subs, __VA_ARGS__), \
671  var, range_min, range_max)); \
672  } while (0)
673 
674 #define xsu(width, name, var, subs, ...) do { \
675  CHECK(ff_cbs_write_signed(ctx, rw, width, #name, \
676  SUBSCRIPTS(subs, __VA_ARGS__), var, \
677  MIN_INT_BITS(width), \
678  MAX_INT_BITS(width))); \
679  } while (0)
680 
681 #define uvlc(name, range_min, range_max) do { \
682  CHECK(cbs_av1_write_uvlc(ctx, rw, #name, current->name, \
683  range_min, range_max)); \
684  } while (0)
685 
686 #define ns(max_value, name, subs, ...) do { \
687  CHECK(cbs_av1_write_ns(ctx, rw, max_value, #name, \
688  SUBSCRIPTS(subs, __VA_ARGS__), \
689  current->name)); \
690  } while (0)
691 
692 #define increment(name, min, max) do { \
693  CHECK(cbs_av1_write_increment(ctx, rw, min, max, #name, \
694  current->name)); \
695  } while (0)
696 
697 #define subexp(name, max, subs, ...) do { \
698  CHECK(cbs_av1_write_subexp(ctx, rw, max, #name, \
699  SUBSCRIPTS(subs, __VA_ARGS__), \
700  current->name)); \
701  } while (0)
702 
703 #define delta_q(name) do { \
704  xf(1, name.delta_coded, current->name != 0, 0, 1, 0, ); \
705  if (current->name) \
706  xsu(1 + 6, name.delta_q, current->name, 0, ); \
707  } while (0)
708 
709 #define leb128(name) do { \
710  CHECK(cbs_av1_write_leb128(ctx, rw, #name, current->name)); \
711  } while (0)
712 
713 #define infer(name, value) do { \
714  if (current->name != (value)) { \
715  av_log(ctx->log_ctx, AV_LOG_ERROR, \
716  "%s does not match inferred value: " \
717  "%"PRId64", but should be %"PRId64".\n", \
718  #name, (int64_t)current->name, (int64_t)(value)); \
719  return AVERROR_INVALIDDATA; \
720  } \
721  } while (0)
722 
723 #define byte_alignment(rw) (put_bits_count(rw) % 8)
724 
725 #include "cbs_av1_syntax_template.c"
726 
727 #undef WRITE
728 #undef READWRITE
729 #undef RWContext
730 #undef xf
731 #undef xsu
732 #undef uvlc
733 #undef ns
734 #undef increment
735 #undef subexp
736 #undef delta_q
737 #undef leb128
738 #undef infer
739 #undef byte_alignment
740 
741 
744  int header)
745 {
746  GetBitContext gbc;
747  uint8_t *data;
748  size_t size;
749  uint64_t obu_length;
750  int pos, err, trace;
751 
752  // Don't include this parsing in trace output.
753  trace = ctx->trace_enable;
754  ctx->trace_enable = 0;
755 
756  data = frag->data;
757  size = frag->data_size;
758 
759  if (INT_MAX / 8 < size) {
760  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid fragment: "
761  "too large (%"SIZE_SPECIFIER" bytes).\n", size);
762  err = AVERROR_INVALIDDATA;
763  goto fail;
764  }
765 
766  while (size > 0) {
768  uint64_t obu_size;
769 
770  init_get_bits(&gbc, data, 8 * size);
771 
772  err = cbs_av1_read_obu_header(ctx, &gbc, &header);
773  if (err < 0)
774  goto fail;
775 
776  if (header.obu_has_size_field) {
777  if (get_bits_left(&gbc) < 8) {
778  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid OBU: fragment "
779  "too short (%"SIZE_SPECIFIER" bytes).\n", size);
780  err = AVERROR_INVALIDDATA;
781  goto fail;
782  }
783  err = cbs_av1_read_leb128(ctx, &gbc, "obu_size", &obu_size);
784  if (err < 0)
785  goto fail;
786  } else
787  obu_size = size - 1 - header.obu_extension_flag;
788 
789  pos = get_bits_count(&gbc);
790  av_assert0(pos % 8 == 0 && pos / 8 <= size);
791 
792  obu_length = pos / 8 + obu_size;
793 
794  if (size < obu_length) {
795  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid OBU length: "
796  "%"PRIu64", but only %"SIZE_SPECIFIER" bytes remaining in fragment.\n",
797  obu_length, size);
798  err = AVERROR_INVALIDDATA;
799  goto fail;
800  }
801 
802  err = ff_cbs_insert_unit_data(ctx, frag, -1, header.obu_type,
803  data, obu_length, frag->data_ref);
804  if (err < 0)
805  goto fail;
806 
807  data += obu_length;
808  size -= obu_length;
809  }
810 
811  err = 0;
812 fail:
813  ctx->trace_enable = trace;
814  return err;
815 }
816 
818 {
820 }
821 
823 {
825 }
826 
828 {
829  switch (md->metadata_type) {
832  break;
833  }
834 }
835 
836 static void cbs_av1_free_obu(void *opaque, uint8_t *content)
837 {
838  AV1RawOBU *obu = (AV1RawOBU*)content;
839 
840  switch (obu->header.obu_type) {
841  case AV1_OBU_TILE_GROUP:
843  break;
844  case AV1_OBU_FRAME:
846  break;
847  case AV1_OBU_TILE_LIST:
849  break;
850  case AV1_OBU_METADATA:
852  break;
853  case AV1_OBU_PADDING:
855  break;
856  }
857 
858  av_freep(&obu);
859 }
860 
862  CodedBitstreamUnit *unit,
863  GetBitContext *gbc,
865 {
866  int pos;
867 
868  pos = get_bits_count(gbc);
869  if (pos >= 8 * unit->data_size) {
870  av_log(ctx->log_ctx, AV_LOG_ERROR, "Bitstream ended before "
871  "any data in tile group (%d bits read).\n", pos);
872  return AVERROR_INVALIDDATA;
873  }
874  // Must be byte-aligned at this point.
875  av_assert0(pos % 8 == 0);
876 
877  td->data_ref = av_buffer_ref(unit->data_ref);
878  if (!td->data_ref)
879  return AVERROR(ENOMEM);
880 
881  td->data = unit->data + pos / 8;
882  td->data_size = unit->data_size - pos / 8;
883 
884  return 0;
885 }
886 
888  CodedBitstreamUnit *unit)
889 {
890  CodedBitstreamAV1Context *priv = ctx->priv_data;
891  AV1RawOBU *obu;
892  GetBitContext gbc;
893  int err, start_pos, end_pos;
894 
895  err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*obu),
897  if (err < 0)
898  return err;
899  obu = unit->content;
900 
901  err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
902  if (err < 0)
903  return err;
904 
905  err = cbs_av1_read_obu_header(ctx, &gbc, &obu->header);
906  if (err < 0)
907  return err;
908  av_assert0(obu->header.obu_type == unit->type);
909 
910  if (obu->header.obu_has_size_field) {
911  uint64_t obu_size;
912  err = cbs_av1_read_leb128(ctx, &gbc, "obu_size", &obu_size);
913  if (err < 0)
914  return err;
915  obu->obu_size = obu_size;
916  } else {
917  if (unit->data_size < 1 + obu->header.obu_extension_flag) {
918  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid OBU length: "
919  "unit too short (%"SIZE_SPECIFIER").\n", unit->data_size);
920  return AVERROR_INVALIDDATA;
921  }
922  obu->obu_size = unit->data_size - 1 - obu->header.obu_extension_flag;
923  }
924 
925  start_pos = get_bits_count(&gbc);
926 
927  if (obu->header.obu_extension_flag) {
928  priv->temporal_id = obu->header.temporal_id;
929  priv->spatial_id = obu->header.spatial_id;
930 
933  priv->operating_point_idc) {
934  int in_temporal_layer =
935  (priv->operating_point_idc >> priv->temporal_id ) & 1;
936  int in_spatial_layer =
937  (priv->operating_point_idc >> (priv->spatial_id + 8)) & 1;
938  if (!in_temporal_layer || !in_spatial_layer) {
939  // Decoding will drop this OBU at this operating point.
940  }
941  }
942  } else {
943  priv->temporal_id = 0;
944  priv->spatial_id = 0;
945  }
946 
947  priv->ref = (AV1ReferenceFrameState *)&priv->read_ref;
948 
949  switch (obu->header.obu_type) {
951  {
952  err = cbs_av1_read_sequence_header_obu(ctx, &gbc,
953  &obu->obu.sequence_header);
954  if (err < 0)
955  return err;
956 
958  priv->sequence_header = NULL;
959 
961  if (!priv->sequence_header_ref)
962  return AVERROR(ENOMEM);
963  priv->sequence_header = &obu->obu.sequence_header;
964  }
965  break;
967  {
968  err = cbs_av1_read_temporal_delimiter_obu(ctx, &gbc);
969  if (err < 0)
970  return err;
971  }
972  break;
975  {
976  err = cbs_av1_read_frame_header_obu(ctx, &gbc,
977  &obu->obu.frame_header,
978  obu->header.obu_type ==
980  unit->data_ref);
981  if (err < 0)
982  return err;
983  }
984  break;
985  case AV1_OBU_TILE_GROUP:
986  {
987  err = cbs_av1_read_tile_group_obu(ctx, &gbc,
988  &obu->obu.tile_group);
989  if (err < 0)
990  return err;
991 
992  err = cbs_av1_ref_tile_data(ctx, unit, &gbc,
993  &obu->obu.tile_group.tile_data);
994  if (err < 0)
995  return err;
996  }
997  break;
998  case AV1_OBU_FRAME:
999  {
1000  err = cbs_av1_read_frame_obu(ctx, &gbc, &obu->obu.frame,
1001  unit->data_ref);
1002  if (err < 0)
1003  return err;
1004 
1005  err = cbs_av1_ref_tile_data(ctx, unit, &gbc,
1006  &obu->obu.frame.tile_group.tile_data);
1007  if (err < 0)
1008  return err;
1009  }
1010  break;
1011  case AV1_OBU_TILE_LIST:
1012  {
1013  err = cbs_av1_read_tile_list_obu(ctx, &gbc,
1014  &obu->obu.tile_list);
1015  if (err < 0)
1016  return err;
1017 
1018  err = cbs_av1_ref_tile_data(ctx, unit, &gbc,
1019  &obu->obu.tile_list.tile_data);
1020  if (err < 0)
1021  return err;
1022  }
1023  break;
1024  case AV1_OBU_METADATA:
1025  {
1026  err = cbs_av1_read_metadata_obu(ctx, &gbc, &obu->obu.metadata);
1027  if (err < 0)
1028  return err;
1029  }
1030  break;
1031  case AV1_OBU_PADDING:
1032  {
1033  err = cbs_av1_read_padding_obu(ctx, &gbc, &obu->obu.padding);
1034  if (err < 0)
1035  return err;
1036  }
1037  break;
1038  default:
1039  return AVERROR(ENOSYS);
1040  }
1041 
1042  end_pos = get_bits_count(&gbc);
1043  av_assert0(end_pos <= unit->data_size * 8);
1044 
1045  if (obu->obu_size > 0 &&
1047  obu->header.obu_type != AV1_OBU_TILE_LIST &&
1048  obu->header.obu_type != AV1_OBU_FRAME) {
1049  int nb_bits = obu->obu_size * 8 + start_pos - end_pos;
1050 
1051  if (nb_bits <= 0)
1052  return AVERROR_INVALIDDATA;
1053 
1054  err = cbs_av1_read_trailing_bits(ctx, &gbc, nb_bits);
1055  if (err < 0)
1056  return err;
1057  }
1058 
1059  return 0;
1060 }
1061 
1063  CodedBitstreamUnit *unit,
1064  PutBitContext *pbc)
1065 {
1066  CodedBitstreamAV1Context *priv = ctx->priv_data;
1067  AV1RawOBU *obu = unit->content;
1068  PutBitContext pbc_tmp;
1069  AV1RawTileData *td;
1070  size_t header_size;
1071  int err, start_pos, end_pos, data_pos;
1072 
1073  // OBUs in the normal bitstream format must contain a size field
1074  // in every OBU (in annex B it is optional, but we don't support
1075  // writing that).
1076  obu->header.obu_has_size_field = 1;
1077 
1078  err = cbs_av1_write_obu_header(ctx, pbc, &obu->header);
1079  if (err < 0)
1080  return err;
1081 
1082  if (obu->header.obu_has_size_field) {
1083  pbc_tmp = *pbc;
1084  // Add space for the size field to fill later.
1085  put_bits32(pbc, 0);
1086  put_bits32(pbc, 0);
1087  }
1088 
1089  td = NULL;
1090  start_pos = put_bits_count(pbc);
1091 
1092  priv->ref = (AV1ReferenceFrameState *)&priv->write_ref;
1093 
1094  switch (obu->header.obu_type) {
1096  {
1097  err = cbs_av1_write_sequence_header_obu(ctx, pbc,
1098  &obu->obu.sequence_header);
1099  if (err < 0)
1100  return err;
1101 
1103  priv->sequence_header = NULL;
1104 
1106  if (!priv->sequence_header_ref)
1107  return AVERROR(ENOMEM);
1108  priv->sequence_header = &obu->obu.sequence_header;
1109  }
1110  break;
1112  {
1113  err = cbs_av1_write_temporal_delimiter_obu(ctx, pbc);
1114  if (err < 0)
1115  return err;
1116  }
1117  break;
1118  case AV1_OBU_FRAME_HEADER:
1120  {
1121  err = cbs_av1_write_frame_header_obu(ctx, pbc,
1122  &obu->obu.frame_header,
1123  obu->header.obu_type ==
1125  NULL);
1126  if (err < 0)
1127  return err;
1128  }
1129  break;
1130  case AV1_OBU_TILE_GROUP:
1131  {
1132  err = cbs_av1_write_tile_group_obu(ctx, pbc,
1133  &obu->obu.tile_group);
1134  if (err < 0)
1135  return err;
1136 
1137  td = &obu->obu.tile_group.tile_data;
1138  }
1139  break;
1140  case AV1_OBU_FRAME:
1141  {
1142  err = cbs_av1_write_frame_obu(ctx, pbc, &obu->obu.frame, NULL);
1143  if (err < 0)
1144  return err;
1145 
1146  td = &obu->obu.frame.tile_group.tile_data;
1147  }
1148  break;
1149  case AV1_OBU_TILE_LIST:
1150  {
1151  err = cbs_av1_write_tile_list_obu(ctx, pbc, &obu->obu.tile_list);
1152  if (err < 0)
1153  return err;
1154 
1155  td = &obu->obu.tile_list.tile_data;
1156  }
1157  break;
1158  case AV1_OBU_METADATA:
1159  {
1160  err = cbs_av1_write_metadata_obu(ctx, pbc, &obu->obu.metadata);
1161  if (err < 0)
1162  return err;
1163  }
1164  break;
1165  case AV1_OBU_PADDING:
1166  {
1167  err = cbs_av1_write_padding_obu(ctx, pbc, &obu->obu.padding);
1168  if (err < 0)
1169  return err;
1170  }
1171  break;
1172  default:
1173  return AVERROR(ENOSYS);
1174  }
1175 
1176  end_pos = put_bits_count(pbc);
1177  header_size = (end_pos - start_pos + 7) / 8;
1178  if (td) {
1179  obu->obu_size = header_size + td->data_size;
1180  } else if (header_size > 0) {
1181  // Add trailing bits and recalculate.
1182  err = cbs_av1_write_trailing_bits(ctx, pbc, 8 - end_pos % 8);
1183  if (err < 0)
1184  return err;
1185  end_pos = put_bits_count(pbc);
1186  obu->obu_size = header_size = (end_pos - start_pos + 7) / 8;
1187  } else {
1188  // Empty OBU.
1189  obu->obu_size = 0;
1190  }
1191 
1192  end_pos = put_bits_count(pbc);
1193  // Must now be byte-aligned.
1194  av_assert0(end_pos % 8 == 0);
1195  flush_put_bits(pbc);
1196  start_pos /= 8;
1197  end_pos /= 8;
1198 
1199  *pbc = pbc_tmp;
1200  err = cbs_av1_write_leb128(ctx, pbc, "obu_size", obu->obu_size);
1201  if (err < 0)
1202  return err;
1203 
1204  data_pos = put_bits_count(pbc) / 8;
1205  flush_put_bits(pbc);
1206  av_assert0(data_pos <= start_pos);
1207 
1208  if (8 * obu->obu_size > put_bits_left(pbc))
1209  return AVERROR(ENOSPC);
1210 
1211  if (obu->obu_size > 0) {
1212  memmove(pbc->buf + data_pos,
1213  pbc->buf + start_pos, header_size);
1214  skip_put_bytes(pbc, header_size);
1215 
1216  if (td) {
1217  memcpy(pbc->buf + data_pos + header_size,
1218  td->data, td->data_size);
1219  skip_put_bytes(pbc, td->data_size);
1220  }
1221  }
1222 
1223  // OBU data must be byte-aligned.
1224  av_assert0(put_bits_count(pbc) % 8 == 0);
1225 
1226  return 0;
1227 }
1228 
1230  CodedBitstreamFragment *frag)
1231 {
1232  size_t size, pos;
1233  int i;
1234 
1235  size = 0;
1236  for (i = 0; i < frag->nb_units; i++)
1237  size += frag->units[i].data_size;
1238 
1240  if (!frag->data_ref)
1241  return AVERROR(ENOMEM);
1242  frag->data = frag->data_ref->data;
1243  memset(frag->data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1244 
1245  pos = 0;
1246  for (i = 0; i < frag->nb_units; i++) {
1247  memcpy(frag->data + pos, frag->units[i].data,
1248  frag->units[i].data_size);
1249  pos += frag->units[i].data_size;
1250  }
1251  av_assert0(pos == size);
1252  frag->data_size = size;
1253 
1254  return 0;
1255 }
1256 
1258 {
1259  CodedBitstreamAV1Context *priv = ctx->priv_data;
1260 
1263 }
1264 
1267 
1268  .priv_data_size = sizeof(CodedBitstreamAV1Context),
1269 
1274 
1275  .close = &cbs_av1_close,
1276 };
AV1RawMetadata metadata
Definition: cbs_av1.h:398
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
int nb_units
Number of units in this fragment.
Definition: cbs.h:147
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
AV1ReferenceFrameState write_ref[AV1_NUM_REF_FRAMES]
Definition: cbs_av1.h:447
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
size_t obu_size
Definition: cbs_av1.h:390
AV1RawTileList tile_list
Definition: cbs_av1.h:397
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:208
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
AVBufferRef * payload_ref
Definition: cbs_av1.h:350
static void cbs_av1_free_metadata(AV1RawMetadata *md)
Definition: cbs_av1.c:827
AVBufferRef * sequence_header_ref
Definition: cbs_av1.h:420
CodedBitstreamUnitType type
Codec-specific type of this unit.
Definition: cbs.h:68
static int cbs_av1_read_uvlc(CodedBitstreamContext *ctx, GetBitContext *gbc, const char *name, uint32_t *write_to, uint32_t range_min, uint32_t range_max)
Definition: cbs_av1.c:28
static void cbs_av1_close(CodedBitstreamContext *ctx)
Definition: cbs_av1.c:1257
const char * b
Definition: vf_curves.c:116
int ff_cbs_alloc_unit_content(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit, size_t size, void(*free)(void *opaque, uint8_t *data))
Definition: cbs.c:644
uint8_t order_hint_bits_minus_1
Definition: cbs_av1.h:122
int ff_cbs_write_unsigned(CodedBitstreamContext *ctx, PutBitContext *pbc, int width, const char *name, const int *subscripts, uint32_t value, uint32_t range_min, uint32_t range_max)
Definition: cbs.c:528
static int cbs_av1_write_increment(CodedBitstreamContext *ctx, PutBitContext *pbc, uint32_t range_min, uint32_t range_max, const char *name, uint32_t value)
Definition: cbs_av1.c:350
static void cbs_av1_free_obu(void *opaque, uint8_t *content)
Definition: cbs_av1.c:836
#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
AV1RawTileData tile_data
Definition: cbs_av1.h:309
static int cbs_av1_write_uvlc(CodedBitstreamContext *ctx, PutBitContext *pbc, const char *name, uint32_t value, uint32_t range_min, uint32_t range_max)
Definition: cbs_av1.c:106
int(* assemble_fragment)(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag)
Definition: cbs_internal.h:55
uint8_t
uint8_t * data
Definition: cbs_av1.h:286
static int cbs_av1_read_unit(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit)
Definition: cbs_av1.c:887
#define MAX_UINT_BITS(length)
Definition: cbs_internal.h:98
int ff_cbs_read_unsigned(CodedBitstreamContext *ctx, GetBitContext *gbc, int width, const char *name, const int *subscripts, uint32_t *write_to, uint32_t range_min, uint32_t range_max)
Definition: cbs.c:485
const char data[16]
Definition: mxf.c:91
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:219
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
uint8_t * data
Pointer to the directly-parsable bitstream form of this unit.
Definition: cbs.h:75
static void cbs_av1_free_padding(AV1RawPadding *pd)
Definition: cbs_av1.c:822
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
#define av_log(a,...)
size_t data_size
The number of bytes in the bitstream.
Definition: cbs.h:129
static int cbs_av1_read_ns(CodedBitstreamContext *ctx, GetBitContext *gbc, uint32_t n, const char *name, const int *subscripts, uint32_t *write_to)
Definition: cbs_av1.c:214
int(* write_unit)(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit, PutBitContext *pbc)
Definition: cbs_internal.h:49
#define U(x)
Definition: vp56_arith.h:37
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:849
static void cbs_av1_free_tile_data(AV1RawTileData *td)
Definition: cbs_av1.c:817
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define td
Definition: regdef.h:70
void(* close)(CodedBitstreamContext *ctx)
Definition: cbs_internal.h:59
static int put_bits_left(PutBitContext *s)
Definition: put_bits.h:93
AV1RawTileData tile_data
Definition: cbs_av1.h:296
uint8_t temporal_id
Definition: cbs_av1.h:36
AVBufferRef * frame_header_ref
Definition: cbs_av1.h:423
#define AVERROR(e)
Definition: error.h:43
AV1RawFrame frame
Definition: cbs_av1.h:395
unsigned int pos
Definition: spdifenc.c:412
static int cbs_av1_read_subexp(CodedBitstreamContext *ctx, GetBitContext *gbc, uint32_t range_max, const char *name, const int *subscripts, uint32_t *write_to)
Definition: cbs_av1.c:391
uint8_t * buf
Definition: put_bits.h:38
simple assert() macros that are a bit more flexible than ISO C assert().
union AV1RawOBU::@25 obu
uint8_t bits
Definition: vp3data.h:202
#define fail()
Definition: checkasm.h:123
static int cbs_av1_tile_log2(int blksize, int target)
Definition: cbs_av1.c:506
static int put_bits_count(PutBitContext *s)
Definition: put_bits.h:67
void * log_ctx
Logging context to be passed to all av_log() calls associated with this context.
Definition: cbs.h:173
const CodedBitstreamType ff_cbs_type_av1
Definition: cbs_av1.c:1265
uint8_t obu_extension_flag
Definition: cbs_av1.h:32
const char * name
Definition: qsvenc.c:46
AVBufferRef * payload_ref
Definition: cbs_av1.h:383
static void skip_put_bytes(PutBitContext *s, int n)
Skip the given number of bytes.
Definition: put_bits.h:333
#define md
#define FFMIN(a, b)
Definition: common.h:96
static int cbs_av1_write_obu(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit, PutBitContext *pbc)
Definition: cbs_av1.c:1062
static int cbs_av1_write_leb128(CodedBitstreamContext *ctx, PutBitContext *pbc, const char *name, uint64_t value)
Definition: cbs_av1.c:184
static int cbs_av1_assemble_fragment(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag)
Definition: cbs_av1.c:1229
AV1ReferenceFrameState * ref
Definition: cbs_av1.h:445
uint8_t w
Definition: llviddspenc.c:38
AV1RawOBUHeader header
Definition: cbs_av1.h:388
AVFormatContext * ctx
Definition: movenc.c:48
static int cbs_av1_split_fragment(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag, int header)
Definition: cbs_av1.c:742
static int cbs_av1_ref_tile_data(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit, GetBitContext *gbc, AV1RawTileData *td)
Definition: cbs_av1.c:861
uint8_t * data
Pointer to the bitstream form of this fragment.
Definition: cbs.h:122
size_t data_size
Definition: cbs_av1.h:287
#define av_log2
Definition: intmath.h:83
union AV1RawMetadata::@24 metadata
AVBufferRef * av_buffer_alloc(int size)
Allocate an AVBuffer of the given size using av_malloc().
Definition: buffer.c:67
AV1ReferenceFrameState read_ref[AV1_NUM_REF_FRAMES]
Definition: cbs_av1.h:446
Coded bitstream fragment structure, combining one or more units.
Definition: cbs.h:116
uint8_t * data
The data buffer.
Definition: buffer.h:89
static size_t cbs_av1_get_payload_bytes_left(GetBitContext *gbc)
Definition: cbs_av1.c:525
uint8_t enable_order_hint
Definition: cbs_av1.h:113
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:498
double value
Definition: eval.c:98
Context structure for coded bitstream operations.
Definition: cbs.h:168
static int cbs_av1_write_subexp(CodedBitstreamContext *ctx, PutBitContext *pbc, uint32_t range_max, const char *name, const int *subscripts, uint32_t value)
Definition: cbs_av1.c:441
AVBufferRef * content_ref
If content is reference counted, a reference to the buffer containing content.
Definition: cbs.h:106
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:659
AV1RawTileGroup tile_group
Definition: cbs_av1.h:301
uint8_t obu_type
Definition: cbs_av1.h:31
enum AVCodecID codec_id
Definition: cbs_internal.h:29
AV1RawSequenceHeader * sequence_header
Definition: cbs_av1.h:419
uint8_t spatial_id
Definition: cbs_av1.h:37
int(* read_unit)(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit)
Definition: cbs_internal.h:44
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:546
static int cbs_av1_write_ns(CodedBitstreamContext *ctx, PutBitContext *pbc, uint32_t n, const char *name, const int *subscripts, uint32_t value)
Definition: cbs_av1.c:264
AV1RawSequenceHeader sequence_header
Definition: cbs_av1.h:393
#define SIZE_SPECIFIER
Definition: internal.h:264
AVBufferRef * data_ref
Definition: cbs_av1.h:288
void * priv_data
Internal codec-specific data.
Definition: cbs.h:189
AV1RawMetadataITUTT35 itut_t35
Definition: cbs_av1.h:375
AV1RawPadding padding
Definition: cbs_av1.h:399
common internal api header.
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:101
int(* split_fragment)(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag, int header)
Definition: cbs_internal.h:38
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
#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
static av_always_inline int diff(const uint32_t a, const uint32_t b)
pixel format definitions
uint64_t metadata_type
Definition: cbs_av1.h:370
int len
uint8_t obu_has_size_field
Definition: cbs_av1.h:33
AV1RawTileGroup tile_group
Definition: cbs_av1.h:396
static int cbs_av1_read_increment(CodedBitstreamContext *ctx, GetBitContext *gbc, uint32_t range_min, uint32_t range_max, const char *name, uint32_t *write_to)
Definition: cbs_av1.c:313
AV1RawFrameHeader frame_header
Definition: cbs_av1.h:394
#define av_freep(p)
static int cbs_av1_read_leb128(CodedBitstreamContext *ctx, GetBitContext *gbc, const char *name, uint64_t *write_to)
Definition: cbs_av1.c:151
static int cbs_av1_get_relative_dist(const AV1RawSequenceHeader *seq, unsigned int a, unsigned int b)
Definition: cbs_av1.c:513
AVBufferRef * data_ref
A reference to the buffer containing data.
Definition: cbs.h:139
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
size_t data_size
The number of bytes in the bitstream (including any padding bits in the final byte).
Definition: cbs.h:80
static uint8_t tmp[11]
Definition: aes_ctr.c:26