FFmpeg  4.2.3
cbs_av1.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/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 - (1 << zeroes) + 1;
129  put_bits(pbc, zeroes + 1, 1);
130  put_bits(pbc, zeroes, v);
131  }
132 
133  if (ctx->trace_enable) {
134  char bits[65];
135  int i, j;
136  i = 0;
137  for (j = 0; j < zeroes; j++)
138  bits[i++] = '0';
139  bits[i++] = '1';
140  for (j = 0; j < zeroes; j++)
141  bits[i++] = (v >> (zeroes - j - 1) & 1) ? '1' : '0';
142  bits[i++] = 0;
143  ff_cbs_trace_syntax_element(ctx, position, name, NULL,
144  bits, value);
145  }
146 
147  return 0;
148 }
149 
151  const char *name, uint64_t *write_to)
152 {
153  uint64_t value;
154  int position, err, i;
155 
156  if (ctx->trace_enable)
157  position = get_bits_count(gbc);
158 
159  value = 0;
160  for (i = 0; i < 8; i++) {
161  int subscript[2] = { 1, i };
162  uint32_t byte;
163  err = ff_cbs_read_unsigned(ctx, gbc, 8, "leb128_byte[i]", subscript,
164  &byte, 0x00, 0xff);
165  if (err < 0)
166  return err;
167 
168  value |= (uint64_t)(byte & 0x7f) << (i * 7);
169  if (!(byte & 0x80))
170  break;
171  }
172 
173  if (value > UINT32_MAX)
174  return AVERROR_INVALIDDATA;
175 
176  if (ctx->trace_enable)
177  ff_cbs_trace_syntax_element(ctx, position, name, NULL, "", value);
178 
179  *write_to = value;
180  return 0;
181 }
182 
184  const char *name, uint64_t value)
185 {
186  int position, err, len, i;
187  uint8_t byte;
188 
189  len = (av_log2(value) + 7) / 7;
190 
191  if (ctx->trace_enable)
192  position = put_bits_count(pbc);
193 
194  for (i = 0; i < len; i++) {
195  int subscript[2] = { 1, i };
196 
197  byte = value >> (7 * i) & 0x7f;
198  if (i < len - 1)
199  byte |= 0x80;
200 
201  err = ff_cbs_write_unsigned(ctx, pbc, 8, "leb128_byte[i]", subscript,
202  byte, 0x00, 0xff);
203  if (err < 0)
204  return err;
205  }
206 
207  if (ctx->trace_enable)
208  ff_cbs_trace_syntax_element(ctx, position, name, NULL, "", value);
209 
210  return 0;
211 }
212 
214  uint32_t n, const char *name,
215  const int *subscripts, uint32_t *write_to)
216 {
217  uint32_t w, m, v, extra_bit, value;
218  int position;
219 
220  av_assert0(n > 0);
221 
222  if (ctx->trace_enable)
223  position = get_bits_count(gbc);
224 
225  w = av_log2(n) + 1;
226  m = (1 << w) - n;
227 
228  if (get_bits_left(gbc) < w) {
229  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid non-symmetric value at "
230  "%s: bitstream ended.\n", name);
231  return AVERROR_INVALIDDATA;
232  }
233 
234  if (w - 1 > 0)
235  v = get_bits(gbc, w - 1);
236  else
237  v = 0;
238 
239  if (v < m) {
240  value = v;
241  } else {
242  extra_bit = get_bits1(gbc);
243  value = (v << 1) - m + extra_bit;
244  }
245 
246  if (ctx->trace_enable) {
247  char bits[33];
248  int i;
249  for (i = 0; i < w - 1; i++)
250  bits[i] = (v >> i & 1) ? '1' : '0';
251  if (v >= m)
252  bits[i++] = extra_bit ? '1' : '0';
253  bits[i] = 0;
254 
255  ff_cbs_trace_syntax_element(ctx, position,
256  name, subscripts, bits, value);
257  }
258 
259  *write_to = value;
260  return 0;
261 }
262 
264  uint32_t n, const char *name,
265  const int *subscripts, uint32_t value)
266 {
267  uint32_t w, m, v, extra_bit;
268  int position;
269 
270  if (value > n) {
271  av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
272  "%"PRIu32", but must be in [0,%"PRIu32"].\n",
273  name, value, n);
274  return AVERROR_INVALIDDATA;
275  }
276 
277  if (ctx->trace_enable)
278  position = put_bits_count(pbc);
279 
280  w = av_log2(n) + 1;
281  m = (1 << w) - n;
282 
283  if (put_bits_left(pbc) < w)
284  return AVERROR(ENOSPC);
285 
286  if (value < m) {
287  v = value;
288  put_bits(pbc, w - 1, v);
289  } else {
290  v = m + ((value - m) >> 1);
291  extra_bit = (value - m) & 1;
292  put_bits(pbc, w - 1, v);
293  put_bits(pbc, 1, extra_bit);
294  }
295 
296  if (ctx->trace_enable) {
297  char bits[33];
298  int i;
299  for (i = 0; i < w - 1; i++)
300  bits[i] = (v >> i & 1) ? '1' : '0';
301  if (value >= m)
302  bits[i++] = extra_bit ? '1' : '0';
303  bits[i] = 0;
304 
305  ff_cbs_trace_syntax_element(ctx, position,
306  name, subscripts, bits, value);
307  }
308 
309  return 0;
310 }
311 
313  uint32_t range_min, uint32_t range_max,
314  const char *name, uint32_t *write_to)
315 {
316  uint32_t value;
317  int position, i;
318  char bits[33];
319 
320  av_assert0(range_min <= range_max && range_max - range_min < sizeof(bits) - 1);
321  if (ctx->trace_enable)
322  position = get_bits_count(gbc);
323 
324  for (i = 0, value = range_min; value < range_max;) {
325  if (get_bits_left(gbc) < 1) {
326  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid increment value at "
327  "%s: bitstream ended.\n", name);
328  return AVERROR_INVALIDDATA;
329  }
330  if (get_bits1(gbc)) {
331  bits[i++] = '1';
332  ++value;
333  } else {
334  bits[i++] = '0';
335  break;
336  }
337  }
338 
339  if (ctx->trace_enable) {
340  bits[i] = 0;
341  ff_cbs_trace_syntax_element(ctx, position,
342  name, NULL, bits, value);
343  }
344 
345  *write_to = value;
346  return 0;
347 }
348 
350  uint32_t range_min, uint32_t range_max,
351  const char *name, uint32_t value)
352 {
353  int len;
354 
355  av_assert0(range_min <= range_max && range_max - range_min < 32);
356  if (value < range_min || value > range_max) {
357  av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
358  "%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
359  name, value, range_min, range_max);
360  return AVERROR_INVALIDDATA;
361  }
362 
363  if (value == range_max)
364  len = range_max - range_min;
365  else
366  len = value - range_min + 1;
367  if (put_bits_left(pbc) < len)
368  return AVERROR(ENOSPC);
369 
370  if (ctx->trace_enable) {
371  char bits[33];
372  int i;
373  for (i = 0; i < len; i++) {
374  if (range_min + i == value)
375  bits[i] = '0';
376  else
377  bits[i] = '1';
378  }
379  bits[i] = 0;
381  name, NULL, bits, value);
382  }
383 
384  if (len > 0)
385  put_bits(pbc, len, (1 << len) - 1 - (value != range_max));
386 
387  return 0;
388 }
389 
391  uint32_t range_max, const char *name,
392  const int *subscripts, uint32_t *write_to)
393 {
394  uint32_t value;
395  int position, err;
396  uint32_t max_len, len, range_offset, range_bits;
397 
398  if (ctx->trace_enable)
399  position = get_bits_count(gbc);
400 
401  av_assert0(range_max > 0);
402  max_len = av_log2(range_max - 1) - 3;
403 
404  err = cbs_av1_read_increment(ctx, gbc, 0, max_len,
405  "subexp_more_bits", &len);
406  if (err < 0)
407  return err;
408 
409  if (len) {
410  range_bits = 2 + len;
411  range_offset = 1 << range_bits;
412  } else {
413  range_bits = 3;
414  range_offset = 0;
415  }
416 
417  if (len < max_len) {
418  err = ff_cbs_read_unsigned(ctx, gbc, range_bits,
419  "subexp_bits", NULL, &value,
420  0, MAX_UINT_BITS(range_bits));
421  if (err < 0)
422  return err;
423 
424  } else {
425  err = cbs_av1_read_ns(ctx, gbc, range_max - range_offset,
426  "subexp_final_bits", NULL, &value);
427  if (err < 0)
428  return err;
429  }
430  value += range_offset;
431 
432  if (ctx->trace_enable)
433  ff_cbs_trace_syntax_element(ctx, position,
434  name, subscripts, "", value);
435 
436  *write_to = value;
437  return err;
438 }
439 
441  uint32_t range_max, const char *name,
442  const int *subscripts, uint32_t value)
443 {
444  int position, err;
445  uint32_t max_len, len, range_offset, range_bits;
446 
447  if (value > range_max) {
448  av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
449  "%"PRIu32", but must be in [0,%"PRIu32"].\n",
450  name, value, range_max);
451  return AVERROR_INVALIDDATA;
452  }
453 
454  if (ctx->trace_enable)
455  position = put_bits_count(pbc);
456 
457  av_assert0(range_max > 0);
458  max_len = av_log2(range_max - 1) - 3;
459 
460  if (value < 8) {
461  range_bits = 3;
462  range_offset = 0;
463  len = 0;
464  } else {
465  range_bits = av_log2(value);
466  len = range_bits - 2;
467  if (len > max_len) {
468  // The top bin is combined with the one below it.
469  av_assert0(len == max_len + 1);
470  --range_bits;
471  len = max_len;
472  }
473  range_offset = 1 << range_bits;
474  }
475 
476  err = cbs_av1_write_increment(ctx, pbc, 0, max_len,
477  "subexp_more_bits", len);
478  if (err < 0)
479  return err;
480 
481  if (len < max_len) {
482  err = ff_cbs_write_unsigned(ctx, pbc, range_bits,
483  "subexp_bits", NULL,
484  value - range_offset,
485  0, MAX_UINT_BITS(range_bits));
486  if (err < 0)
487  return err;
488 
489  } else {
490  err = cbs_av1_write_ns(ctx, pbc, range_max - range_offset,
491  "subexp_final_bits", NULL,
492  value - range_offset);
493  if (err < 0)
494  return err;
495  }
496 
497  if (ctx->trace_enable)
498  ff_cbs_trace_syntax_element(ctx, position,
499  name, subscripts, "", value);
500 
501  return err;
502 }
503 
504 
505 static int cbs_av1_tile_log2(int blksize, int target)
506 {
507  int k;
508  for (k = 0; (blksize << k) < target; k++);
509  return k;
510 }
511 
513  unsigned int a, unsigned int b)
514 {
515  unsigned int diff, m;
516  if (!seq->enable_order_hint)
517  return 0;
518  diff = a - b;
519  m = 1 << seq->order_hint_bits_minus_1;
520  diff = (diff & (m - 1)) - (diff & m);
521  return diff;
522 }
523 
525 {
526  GetBitContext tmp = *gbc;
527  size_t size = 0;
528  for (int i = 0; get_bits_left(&tmp) >= 8; i++) {
529  if (get_bits(&tmp, 8))
530  size = i;
531  }
532  return size;
533 }
534 
535 
536 #define HEADER(name) do { \
537  ff_cbs_trace_header(ctx, name); \
538  } while (0)
539 
540 #define CHECK(call) do { \
541  err = (call); \
542  if (err < 0) \
543  return err; \
544  } while (0)
545 
546 #define FUNC_NAME(rw, codec, name) cbs_ ## codec ## _ ## rw ## _ ## name
547 #define FUNC_AV1(rw, name) FUNC_NAME(rw, av1, name)
548 #define FUNC(name) FUNC_AV1(READWRITE, name)
549 
550 #define SUBSCRIPTS(subs, ...) (subs > 0 ? ((int[subs + 1]){ subs, __VA_ARGS__ }) : NULL)
551 
552 #define fb(width, name) \
553  xf(width, name, current->name, 0, MAX_UINT_BITS(width), 0)
554 #define fc(width, name, range_min, range_max) \
555  xf(width, name, current->name, range_min, range_max, 0)
556 #define flag(name) fb(1, name)
557 #define su(width, name) \
558  xsu(width, name, current->name, 0)
559 
560 #define fbs(width, name, subs, ...) \
561  xf(width, name, current->name, 0, MAX_UINT_BITS(width), subs, __VA_ARGS__)
562 #define fcs(width, name, range_min, range_max, subs, ...) \
563  xf(width, name, current->name, range_min, range_max, subs, __VA_ARGS__)
564 #define flags(name, subs, ...) \
565  xf(1, name, current->name, 0, 1, subs, __VA_ARGS__)
566 #define sus(width, name, subs, ...) \
567  xsu(width, name, current->name, subs, __VA_ARGS__)
568 
569 #define fixed(width, name, value) do { \
570  av_unused uint32_t fixed_value = value; \
571  xf(width, name, fixed_value, value, value, 0); \
572  } while (0)
573 
574 
575 #define READ
576 #define READWRITE read
577 #define RWContext GetBitContext
578 
579 #define xf(width, name, var, range_min, range_max, subs, ...) do { \
580  uint32_t value; \
581  CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \
582  SUBSCRIPTS(subs, __VA_ARGS__), \
583  &value, range_min, range_max)); \
584  var = value; \
585  } while (0)
586 
587 #define xsu(width, name, var, subs, ...) do { \
588  int32_t value; \
589  CHECK(ff_cbs_read_signed(ctx, rw, width, #name, \
590  SUBSCRIPTS(subs, __VA_ARGS__), &value, \
591  MIN_INT_BITS(width), \
592  MAX_INT_BITS(width))); \
593  var = value; \
594  } while (0)
595 
596 #define uvlc(name, range_min, range_max) do { \
597  uint32_t value; \
598  CHECK(cbs_av1_read_uvlc(ctx, rw, #name, \
599  &value, range_min, range_max)); \
600  current->name = value; \
601  } while (0)
602 
603 #define ns(max_value, name, subs, ...) do { \
604  uint32_t value; \
605  CHECK(cbs_av1_read_ns(ctx, rw, max_value, #name, \
606  SUBSCRIPTS(subs, __VA_ARGS__), &value)); \
607  current->name = value; \
608  } while (0)
609 
610 #define increment(name, min, max) do { \
611  uint32_t value; \
612  CHECK(cbs_av1_read_increment(ctx, rw, min, max, #name, &value)); \
613  current->name = value; \
614  } while (0)
615 
616 #define subexp(name, max, subs, ...) do { \
617  uint32_t value; \
618  CHECK(cbs_av1_read_subexp(ctx, rw, max, #name, \
619  SUBSCRIPTS(subs, __VA_ARGS__), &value)); \
620  current->name = value; \
621  } while (0)
622 
623 #define delta_q(name) do { \
624  uint8_t delta_coded; \
625  int8_t delta_q; \
626  xf(1, name.delta_coded, delta_coded, 0, 1, 0); \
627  if (delta_coded) \
628  xsu(1 + 6, name.delta_q, delta_q, 0); \
629  else \
630  delta_q = 0; \
631  current->name = delta_q; \
632  } while (0)
633 
634 #define leb128(name) do { \
635  uint64_t value; \
636  CHECK(cbs_av1_read_leb128(ctx, rw, #name, &value)); \
637  current->name = value; \
638  } while (0)
639 
640 #define infer(name, value) do { \
641  current->name = value; \
642  } while (0)
643 
644 #define byte_alignment(rw) (get_bits_count(rw) % 8)
645 
646 #include "cbs_av1_syntax_template.c"
647 
648 #undef READ
649 #undef READWRITE
650 #undef RWContext
651 #undef xf
652 #undef xsu
653 #undef uvlc
654 #undef ns
655 #undef increment
656 #undef subexp
657 #undef delta_q
658 #undef leb128
659 #undef infer
660 #undef byte_alignment
661 
662 
663 #define WRITE
664 #define READWRITE write
665 #define RWContext PutBitContext
666 
667 #define xf(width, name, var, range_min, range_max, subs, ...) do { \
668  CHECK(ff_cbs_write_unsigned(ctx, rw, width, #name, \
669  SUBSCRIPTS(subs, __VA_ARGS__), \
670  var, range_min, range_max)); \
671  } while (0)
672 
673 #define xsu(width, name, var, subs, ...) do { \
674  CHECK(ff_cbs_write_signed(ctx, rw, width, #name, \
675  SUBSCRIPTS(subs, __VA_ARGS__), var, \
676  MIN_INT_BITS(width), \
677  MAX_INT_BITS(width))); \
678  } while (0)
679 
680 #define uvlc(name, range_min, range_max) do { \
681  CHECK(cbs_av1_write_uvlc(ctx, rw, #name, current->name, \
682  range_min, range_max)); \
683  } while (0)
684 
685 #define ns(max_value, name, subs, ...) do { \
686  CHECK(cbs_av1_write_ns(ctx, rw, max_value, #name, \
687  SUBSCRIPTS(subs, __VA_ARGS__), \
688  current->name)); \
689  } while (0)
690 
691 #define increment(name, min, max) do { \
692  CHECK(cbs_av1_write_increment(ctx, rw, min, max, #name, \
693  current->name)); \
694  } while (0)
695 
696 #define subexp(name, max, subs, ...) do { \
697  CHECK(cbs_av1_write_subexp(ctx, rw, max, #name, \
698  SUBSCRIPTS(subs, __VA_ARGS__), \
699  current->name)); \
700  } while (0)
701 
702 #define delta_q(name) do { \
703  xf(1, name.delta_coded, current->name != 0, 0, 1, 0); \
704  if (current->name) \
705  xsu(1 + 6, name.delta_q, current->name, 0); \
706  } while (0)
707 
708 #define leb128(name) do { \
709  CHECK(cbs_av1_write_leb128(ctx, rw, #name, current->name)); \
710  } while (0)
711 
712 #define infer(name, value) do { \
713  if (current->name != (value)) { \
714  av_log(ctx->log_ctx, AV_LOG_WARNING, "Warning: " \
715  "%s does not match inferred value: " \
716  "%"PRId64", but should be %"PRId64".\n", \
717  #name, (int64_t)current->name, (int64_t)(value)); \
718  } \
719  } while (0)
720 
721 #define byte_alignment(rw) (put_bits_count(rw) % 8)
722 
723 #include "cbs_av1_syntax_template.c"
724 
725 #undef WRITE
726 #undef READWRITE
727 #undef RWContext
728 #undef xf
729 #undef xsu
730 #undef uvlc
731 #undef ns
732 #undef increment
733 #undef subexp
734 #undef delta_q
735 #undef leb128
736 #undef infer
737 #undef byte_alignment
738 
739 
742  int header)
743 {
744  GetBitContext gbc;
745  uint8_t *data;
746  size_t size;
747  uint64_t obu_length;
748  int pos, err, trace;
749 
750  // Don't include this parsing in trace output.
751  trace = ctx->trace_enable;
752  ctx->trace_enable = 0;
753 
754  data = frag->data;
755  size = frag->data_size;
756 
757  if (INT_MAX / 8 < size) {
758  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid fragment: "
759  "too large (%"SIZE_SPECIFIER" bytes).\n", size);
760  err = AVERROR_INVALIDDATA;
761  goto fail;
762  }
763 
764  while (size > 0) {
766  uint64_t obu_size;
767 
768  init_get_bits(&gbc, data, 8 * size);
769 
770  err = cbs_av1_read_obu_header(ctx, &gbc, &header);
771  if (err < 0)
772  goto fail;
773 
774  if (get_bits_left(&gbc) < 8) {
775  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid OBU: fragment "
776  "too short (%"SIZE_SPECIFIER" bytes).\n", size);
777  err = AVERROR_INVALIDDATA;
778  goto fail;
779  }
780 
781  if (header.obu_has_size_field) {
782  err = cbs_av1_read_leb128(ctx, &gbc, "obu_size", &obu_size);
783  if (err < 0)
784  goto fail;
785  } else
786  obu_size = size - 1 - header.obu_extension_flag;
787 
788  pos = get_bits_count(&gbc);
789  av_assert0(pos % 8 == 0 && pos / 8 <= size);
790 
791  obu_length = pos / 8 + obu_size;
792 
793  if (size < obu_length) {
794  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid OBU length: "
795  "%"PRIu64", but only %"SIZE_SPECIFIER" bytes remaining in fragment.\n",
796  obu_length, size);
797  err = AVERROR_INVALIDDATA;
798  goto fail;
799  }
800 
801  err = ff_cbs_insert_unit_data(ctx, frag, -1, header.obu_type,
802  data, obu_length, frag->data_ref);
803  if (err < 0)
804  goto fail;
805 
806  data += obu_length;
807  size -= obu_length;
808  }
809 
810  err = 0;
811 fail:
812  ctx->trace_enable = trace;
813  return err;
814 }
815 
817 {
819 }
820 
822 {
824 }
825 
827 {
828  switch (md->metadata_type) {
831  break;
832  }
833 }
834 
835 static void cbs_av1_free_obu(void *unit, uint8_t *content)
836 {
837  AV1RawOBU *obu = (AV1RawOBU*)content;
838 
839  switch (obu->header.obu_type) {
840  case AV1_OBU_TILE_GROUP:
842  break;
843  case AV1_OBU_FRAME:
845  break;
846  case AV1_OBU_TILE_LIST:
848  break;
849  case AV1_OBU_METADATA:
851  break;
852  case AV1_OBU_PADDING:
854  break;
855  }
856 
857  av_freep(&obu);
858 }
859 
861  CodedBitstreamUnit *unit,
862  GetBitContext *gbc,
864 {
865  int pos;
866 
867  pos = get_bits_count(gbc);
868  if (pos >= 8 * unit->data_size) {
869  av_log(ctx->log_ctx, AV_LOG_ERROR, "Bitstream ended before "
870  "any data in tile group (%d bits read).\n", pos);
871  return AVERROR_INVALIDDATA;
872  }
873  // Must be byte-aligned at this point.
874  av_assert0(pos % 8 == 0);
875 
876  td->data_ref = av_buffer_ref(unit->data_ref);
877  if (!td->data_ref)
878  return AVERROR(ENOMEM);
879 
880  td->data = unit->data + pos / 8;
881  td->data_size = unit->data_size - pos / 8;
882 
883  return 0;
884 }
885 
887  CodedBitstreamUnit *unit)
888 {
889  CodedBitstreamAV1Context *priv = ctx->priv_data;
890  AV1RawOBU *obu;
891  GetBitContext gbc;
892  int err, start_pos, end_pos;
893 
894  err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*obu),
896  if (err < 0)
897  return err;
898  obu = unit->content;
899 
900  err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
901  if (err < 0)
902  return err;
903 
904  err = cbs_av1_read_obu_header(ctx, &gbc, &obu->header);
905  if (err < 0)
906  return err;
907  av_assert0(obu->header.obu_type == unit->type);
908 
909  if (obu->header.obu_has_size_field) {
910  uint64_t obu_size;
911  err = cbs_av1_read_leb128(ctx, &gbc, "obu_size", &obu_size);
912  if (err < 0)
913  return err;
914  obu->obu_size = obu_size;
915  } else {
916  if (unit->data_size < 1 + obu->header.obu_extension_flag) {
917  av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid OBU length: "
918  "unit too short (%"SIZE_SPECIFIER").\n", unit->data_size);
919  return AVERROR_INVALIDDATA;
920  }
921  obu->obu_size = unit->data_size - 1 - obu->header.obu_extension_flag;
922  }
923 
924  start_pos = get_bits_count(&gbc);
925 
926  if (obu->header.obu_extension_flag) {
927  priv->temporal_id = obu->header.temporal_id;
928  priv->spatial_id = obu->header.spatial_id;
929 
932  priv->operating_point_idc) {
933  int in_temporal_layer =
934  (priv->operating_point_idc >> priv->temporal_id ) & 1;
935  int in_spatial_layer =
936  (priv->operating_point_idc >> (priv->spatial_id + 8)) & 1;
937  if (!in_temporal_layer || !in_spatial_layer) {
938  // Decoding will drop this OBU at this operating point.
939  }
940  }
941  } else {
942  priv->temporal_id = 0;
943  priv->spatial_id = 0;
944  }
945 
946  priv->ref = (AV1ReferenceFrameState *)&priv->read_ref;
947 
948  switch (obu->header.obu_type) {
950  {
951  err = cbs_av1_read_sequence_header_obu(ctx, &gbc,
952  &obu->obu.sequence_header);
953  if (err < 0)
954  return err;
955 
957  priv->sequence_header = NULL;
958 
960  if (!priv->sequence_header_ref)
961  return AVERROR(ENOMEM);
962  priv->sequence_header = &obu->obu.sequence_header;
963  }
964  break;
966  {
967  err = cbs_av1_read_temporal_delimiter_obu(ctx, &gbc);
968  if (err < 0)
969  return err;
970  }
971  break;
974  {
975  err = cbs_av1_read_frame_header_obu(ctx, &gbc,
976  &obu->obu.frame_header,
977  obu->header.obu_type ==
979  unit->data_ref);
980  if (err < 0)
981  return err;
982  }
983  break;
984  case AV1_OBU_TILE_GROUP:
985  {
986  err = cbs_av1_read_tile_group_obu(ctx, &gbc,
987  &obu->obu.tile_group);
988  if (err < 0)
989  return err;
990 
991  err = cbs_av1_ref_tile_data(ctx, unit, &gbc,
992  &obu->obu.tile_group.tile_data);
993  if (err < 0)
994  return err;
995  }
996  break;
997  case AV1_OBU_FRAME:
998  {
999  err = cbs_av1_read_frame_obu(ctx, &gbc, &obu->obu.frame,
1000  unit->data_ref);
1001  if (err < 0)
1002  return err;
1003 
1004  err = cbs_av1_ref_tile_data(ctx, unit, &gbc,
1005  &obu->obu.frame.tile_group.tile_data);
1006  if (err < 0)
1007  return err;
1008  }
1009  break;
1010  case AV1_OBU_TILE_LIST:
1011  {
1012  err = cbs_av1_read_tile_list_obu(ctx, &gbc,
1013  &obu->obu.tile_list);
1014  if (err < 0)
1015  return err;
1016 
1017  err = cbs_av1_ref_tile_data(ctx, unit, &gbc,
1018  &obu->obu.tile_list.tile_data);
1019  if (err < 0)
1020  return err;
1021  }
1022  break;
1023  case AV1_OBU_METADATA:
1024  {
1025  err = cbs_av1_read_metadata_obu(ctx, &gbc, &obu->obu.metadata);
1026  if (err < 0)
1027  return err;
1028  }
1029  break;
1030  case AV1_OBU_PADDING:
1031  {
1032  err = cbs_av1_read_padding_obu(ctx, &gbc, &obu->obu.padding);
1033  if (err < 0)
1034  return err;
1035  }
1036  break;
1037  default:
1038  return AVERROR(ENOSYS);
1039  }
1040 
1041  end_pos = get_bits_count(&gbc);
1042  av_assert0(end_pos <= unit->data_size * 8);
1043 
1044  if (obu->obu_size > 0 &&
1046  obu->header.obu_type != AV1_OBU_TILE_LIST &&
1047  obu->header.obu_type != AV1_OBU_FRAME) {
1048  int nb_bits = obu->obu_size * 8 + start_pos - end_pos;
1049 
1050  if (nb_bits <= 0)
1051  return AVERROR_INVALIDDATA;
1052 
1053  err = cbs_av1_read_trailing_bits(ctx, &gbc, nb_bits);
1054  if (err < 0)
1055  return err;
1056  }
1057 
1058  return 0;
1059 }
1060 
1062  CodedBitstreamUnit *unit,
1063  PutBitContext *pbc)
1064 {
1065  CodedBitstreamAV1Context *priv = ctx->priv_data;
1066  AV1RawOBU *obu = unit->content;
1067  PutBitContext pbc_tmp;
1068  AV1RawTileData *td;
1069  size_t header_size;
1070  int err, start_pos, end_pos, data_pos;
1071 
1072  // OBUs in the normal bitstream format must contain a size field
1073  // in every OBU (in annex B it is optional, but we don't support
1074  // writing that).
1075  obu->header.obu_has_size_field = 1;
1076 
1077  err = cbs_av1_write_obu_header(ctx, pbc, &obu->header);
1078  if (err < 0)
1079  return err;
1080 
1081  if (obu->header.obu_has_size_field) {
1082  pbc_tmp = *pbc;
1083  // Add space for the size field to fill later.
1084  put_bits32(pbc, 0);
1085  put_bits32(pbc, 0);
1086  }
1087 
1088  td = NULL;
1089  start_pos = put_bits_count(pbc);
1090 
1091  priv->ref = (AV1ReferenceFrameState *)&priv->write_ref;
1092 
1093  switch (obu->header.obu_type) {
1095  {
1096  err = cbs_av1_write_sequence_header_obu(ctx, pbc,
1097  &obu->obu.sequence_header);
1098  if (err < 0)
1099  return err;
1100 
1102  priv->sequence_header = NULL;
1103 
1105  if (!priv->sequence_header_ref)
1106  return AVERROR(ENOMEM);
1107  priv->sequence_header = &obu->obu.sequence_header;
1108  }
1109  break;
1111  {
1112  err = cbs_av1_write_temporal_delimiter_obu(ctx, pbc);
1113  if (err < 0)
1114  return err;
1115  }
1116  break;
1117  case AV1_OBU_FRAME_HEADER:
1119  {
1120  err = cbs_av1_write_frame_header_obu(ctx, pbc,
1121  &obu->obu.frame_header,
1122  obu->header.obu_type ==
1124  NULL);
1125  if (err < 0)
1126  return err;
1127  }
1128  break;
1129  case AV1_OBU_TILE_GROUP:
1130  {
1131  err = cbs_av1_write_tile_group_obu(ctx, pbc,
1132  &obu->obu.tile_group);
1133  if (err < 0)
1134  return err;
1135 
1136  td = &obu->obu.tile_group.tile_data;
1137  }
1138  break;
1139  case AV1_OBU_FRAME:
1140  {
1141  err = cbs_av1_write_frame_obu(ctx, pbc, &obu->obu.frame, NULL);
1142  if (err < 0)
1143  return err;
1144 
1145  td = &obu->obu.frame.tile_group.tile_data;
1146  }
1147  break;
1148  case AV1_OBU_TILE_LIST:
1149  {
1150  err = cbs_av1_write_tile_list_obu(ctx, pbc, &obu->obu.tile_list);
1151  if (err < 0)
1152  return err;
1153 
1154  td = &obu->obu.tile_list.tile_data;
1155  }
1156  break;
1157  case AV1_OBU_METADATA:
1158  {
1159  err = cbs_av1_write_metadata_obu(ctx, pbc, &obu->obu.metadata);
1160  if (err < 0)
1161  return err;
1162  }
1163  break;
1164  case AV1_OBU_PADDING:
1165  {
1166  err = cbs_av1_write_padding_obu(ctx, pbc, &obu->obu.padding);
1167  if (err < 0)
1168  return err;
1169  }
1170  break;
1171  default:
1172  return AVERROR(ENOSYS);
1173  }
1174 
1175  end_pos = put_bits_count(pbc);
1176  header_size = (end_pos - start_pos + 7) / 8;
1177  if (td) {
1178  obu->obu_size = header_size + td->data_size;
1179  } else if (header_size > 0) {
1180  // Add trailing bits and recalculate.
1181  err = cbs_av1_write_trailing_bits(ctx, pbc, 8 - end_pos % 8);
1182  if (err < 0)
1183  return err;
1184  end_pos = put_bits_count(pbc);
1185  obu->obu_size = header_size = (end_pos - start_pos + 7) / 8;
1186  } else {
1187  // Empty OBU.
1188  obu->obu_size = 0;
1189  }
1190 
1191  end_pos = put_bits_count(pbc);
1192  // Must now be byte-aligned.
1193  av_assert0(end_pos % 8 == 0);
1194  flush_put_bits(pbc);
1195  start_pos /= 8;
1196  end_pos /= 8;
1197 
1198  *pbc = pbc_tmp;
1199  err = cbs_av1_write_leb128(ctx, pbc, "obu_size", obu->obu_size);
1200  if (err < 0)
1201  return err;
1202 
1203  data_pos = put_bits_count(pbc) / 8;
1204  flush_put_bits(pbc);
1205  av_assert0(data_pos <= start_pos);
1206 
1207  if (8 * obu->obu_size > put_bits_left(pbc))
1208  return AVERROR(ENOSPC);
1209 
1210  if (obu->obu_size > 0) {
1211  memmove(pbc->buf + data_pos,
1212  pbc->buf + start_pos, header_size);
1213  skip_put_bytes(pbc, header_size);
1214 
1215  if (td) {
1216  memcpy(pbc->buf + data_pos + header_size,
1217  td->data, td->data_size);
1218  skip_put_bytes(pbc, td->data_size);
1219  }
1220  }
1221 
1222  // OBU data must be byte-aligned.
1223  av_assert0(put_bits_count(pbc) % 8 == 0);
1224 
1225  return 0;
1226 }
1227 
1229  CodedBitstreamFragment *frag)
1230 {
1231  size_t size, pos;
1232  int i;
1233 
1234  size = 0;
1235  for (i = 0; i < frag->nb_units; i++)
1236  size += frag->units[i].data_size;
1237 
1239  if (!frag->data_ref)
1240  return AVERROR(ENOMEM);
1241  frag->data = frag->data_ref->data;
1242  memset(frag->data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1243 
1244  pos = 0;
1245  for (i = 0; i < frag->nb_units; i++) {
1246  memcpy(frag->data + pos, frag->units[i].data,
1247  frag->units[i].data_size);
1248  pos += frag->units[i].data_size;
1249  }
1250  av_assert0(pos == size);
1251  frag->data_size = size;
1252 
1253  return 0;
1254 }
1255 
1257 {
1258  CodedBitstreamAV1Context *priv = ctx->priv_data;
1259 
1262 }
1263 
1266 
1267  .priv_data_size = sizeof(CodedBitstreamAV1Context),
1268 
1273 
1274  .close = &cbs_av1_close,
1275 };
const char * name
Definition: avisynth_c.h:867
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
static void cbs_av1_free_obu(void *unit, uint8_t *content)
Definition: cbs_av1.c:835
AV1ReferenceFrameState write_ref[AV1_NUM_REF_FRAMES]
Definition: cbs_av1.h:446
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:826
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:1256
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:349
#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:886
#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:821
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:213
int(* write_unit)(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit, PutBitContext *pbc)
Definition: cbs_internal.h:49
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:816
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
#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
union AV1RawOBU::@48 obu
AV1RawFrame frame
Definition: cbs_av1.h:395
union AV1RawMetadata::@47 metadata
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:390
uint8_t * buf
Definition: put_bits.h:38
simple assert() macros that are a bit more flexible than ISO C assert().
uint8_t bits
Definition: vp3data.h:202
#define fail()
Definition: checkasm.h:120
static int cbs_av1_tile_log2(int blksize, int target)
Definition: cbs_av1.c:505
static int put_bits_count(PutBitContext *s)
Definition: put_bits.h:85
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:1264
uint8_t obu_extension_flag
Definition: cbs_av1.h:32
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:1061
static int cbs_av1_write_leb128(CodedBitstreamContext *ctx, PutBitContext *pbc, const char *name, uint64_t value)
Definition: cbs_av1.c:183
static int cbs_av1_assemble_fragment(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag)
Definition: cbs_av1.c:1228
AV1ReferenceFrameState * ref
Definition: cbs_av1.h:444
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:740
int n
Definition: avisynth_c.h:760
static int cbs_av1_ref_tile_data(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit, GetBitContext *gbc, AV1RawTileData *td)
Definition: cbs_av1.c:860
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
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:445
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:524
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:440
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:263
AV1RawSequenceHeader sequence_header
Definition: cbs_av1.h:393
#define SIZE_SPECIFIER
Definition: internal.h:262
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:790
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:312
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:150
static int cbs_av1_get_relative_dist(const AV1RawSequenceHeader *seq, unsigned int a, unsigned int b)
Definition: cbs_av1.c:512
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