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
FUNC(obu_header)19 static int FUNC(obu_header)(CodedBitstreamContext *ctx, RWContext *rw,
20 AV1RawOBUHeader *current)
21 {
22 int err;
23
24 HEADER("OBU header");
25
26 fc(1, obu_forbidden_bit, 0, 0);
27
28 fc(4, obu_type, 0, AV1_OBU_PADDING);
29 flag(obu_extension_flag);
30 flag(obu_has_size_field);
31
32 fc(1, obu_reserved_1bit, 0, 0);
33
34 if (current->obu_extension_flag) {
35 fb(3, temporal_id);
36 fb(2, spatial_id);
37 fc(3, extension_header_reserved_3bits, 0, 0);
38 }
39
40 return 0;
41 }
42
FUNC(trailing_bits)43 static int FUNC(trailing_bits)(CodedBitstreamContext *ctx, RWContext *rw, int nb_bits)
44 {
45 int err;
46
47 av_assert0(nb_bits > 0);
48
49 fixed(1, trailing_one_bit, 1);
50 --nb_bits;
51
52 while (nb_bits > 0) {
53 fixed(1, trailing_zero_bit, 0);
54 --nb_bits;
55 }
56
57 return 0;
58 }
59
FUNC(byte_alignment)60 static int FUNC(byte_alignment)(CodedBitstreamContext *ctx, RWContext *rw)
61 {
62 int err;
63
64 while (byte_alignment(rw) != 0)
65 fixed(1, zero_bit, 0);
66
67 return 0;
68 }
69
FUNC(color_config)70 static int FUNC(color_config)(CodedBitstreamContext *ctx, RWContext *rw,
71 AV1RawColorConfig *current, int seq_profile)
72 {
73 CodedBitstreamAV1Context *priv = ctx->priv_data;
74 int err;
75
76 flag(high_bitdepth);
77
78 if (seq_profile == FF_PROFILE_AV1_PROFESSIONAL &&
79 current->high_bitdepth) {
80 flag(twelve_bit);
81 priv->bit_depth = current->twelve_bit ? 12 : 10;
82 } else {
83 priv->bit_depth = current->high_bitdepth ? 10 : 8;
84 }
85
86 if (seq_profile == FF_PROFILE_AV1_HIGH)
87 infer(mono_chrome, 0);
88 else
89 flag(mono_chrome);
90 priv->num_planes = current->mono_chrome ? 1 : 3;
91
92 flag(color_description_present_flag);
93 if (current->color_description_present_flag) {
94 fb(8, color_primaries);
95 fb(8, transfer_characteristics);
96 fb(8, matrix_coefficients);
97 } else {
98 infer(color_primaries, AVCOL_PRI_UNSPECIFIED);
99 infer(transfer_characteristics, AVCOL_TRC_UNSPECIFIED);
100 infer(matrix_coefficients, AVCOL_SPC_UNSPECIFIED);
101 }
102
103 if (current->mono_chrome) {
104 flag(color_range);
105
106 infer(subsampling_x, 1);
107 infer(subsampling_y, 1);
108 infer(chroma_sample_position, AV1_CSP_UNKNOWN);
109 infer(separate_uv_delta_q, 0);
110
111 } else if (current->color_primaries == AVCOL_PRI_BT709 &&
112 current->transfer_characteristics == AVCOL_TRC_IEC61966_2_1 &&
113 current->matrix_coefficients == AVCOL_SPC_RGB) {
114 infer(color_range, 1);
115 infer(subsampling_x, 0);
116 infer(subsampling_y, 0);
117 flag(separate_uv_delta_q);
118
119 } else {
120 flag(color_range);
121
122 if (seq_profile == FF_PROFILE_AV1_MAIN) {
123 infer(subsampling_x, 1);
124 infer(subsampling_y, 1);
125 } else if (seq_profile == FF_PROFILE_AV1_HIGH) {
126 infer(subsampling_x, 0);
127 infer(subsampling_y, 0);
128 } else {
129 if (priv->bit_depth == 12) {
130 fb(1, subsampling_x);
131 if (current->subsampling_x)
132 fb(1, subsampling_y);
133 else
134 infer(subsampling_y, 0);
135 } else {
136 infer(subsampling_x, 1);
137 infer(subsampling_y, 0);
138 }
139 }
140 if (current->subsampling_x && current->subsampling_y) {
141 fc(2, chroma_sample_position, AV1_CSP_UNKNOWN,
142 AV1_CSP_COLOCATED);
143 }
144
145 flag(separate_uv_delta_q);
146 }
147
148 return 0;
149 }
150
FUNC(timing_info)151 static int FUNC(timing_info)(CodedBitstreamContext *ctx, RWContext *rw,
152 AV1RawTimingInfo *current)
153 {
154 int err;
155
156 fc(32, num_units_in_display_tick, 1, MAX_UINT_BITS(32));
157 fc(32, time_scale, 1, MAX_UINT_BITS(32));
158
159 flag(equal_picture_interval);
160 if (current->equal_picture_interval)
161 uvlc(num_ticks_per_picture_minus_1, 0, MAX_UINT_BITS(32) - 1);
162
163 return 0;
164 }
165
FUNC(decoder_model_info)166 static int FUNC(decoder_model_info)(CodedBitstreamContext *ctx, RWContext *rw,
167 AV1RawDecoderModelInfo *current)
168 {
169 int err;
170
171 fb(5, buffer_delay_length_minus_1);
172 fb(32, num_units_in_decoding_tick);
173 fb(5, buffer_removal_time_length_minus_1);
174 fb(5, frame_presentation_time_length_minus_1);
175
176 return 0;
177 }
178
FUNC(sequence_header_obu)179 static int FUNC(sequence_header_obu)(CodedBitstreamContext *ctx, RWContext *rw,
180 AV1RawSequenceHeader *current)
181 {
182 int i, err;
183
184 HEADER("Sequence Header");
185
186 fc(3, seq_profile, FF_PROFILE_AV1_MAIN,
187 FF_PROFILE_AV1_PROFESSIONAL);
188 flag(still_picture);
189 flag(reduced_still_picture_header);
190
191 if (current->reduced_still_picture_header) {
192 infer(timing_info_present_flag, 0);
193 infer(decoder_model_info_present_flag, 0);
194 infer(initial_display_delay_present_flag, 0);
195 infer(operating_points_cnt_minus_1, 0);
196 infer(operating_point_idc[0], 0);
197
198 fb(5, seq_level_idx[0]);
199
200 infer(seq_tier[0], 0);
201 infer(decoder_model_present_for_this_op[0], 0);
202 infer(initial_display_delay_present_for_this_op[0], 0);
203
204 } else {
205 flag(timing_info_present_flag);
206 if (current->timing_info_present_flag) {
207 CHECK(FUNC(timing_info)(ctx, rw, ¤t->timing_info));
208
209 flag(decoder_model_info_present_flag);
210 if (current->decoder_model_info_present_flag) {
211 CHECK(FUNC(decoder_model_info)
212 (ctx, rw, ¤t->decoder_model_info));
213 }
214 } else {
215 infer(decoder_model_info_present_flag, 0);
216 }
217
218 flag(initial_display_delay_present_flag);
219
220 fb(5, operating_points_cnt_minus_1);
221 for (i = 0; i <= current->operating_points_cnt_minus_1; i++) {
222 fbs(12, operating_point_idc[i], 1, i);
223 fbs(5, seq_level_idx[i], 1, i);
224
225 if (current->seq_level_idx[i] > 7)
226 flags(seq_tier[i], 1, i);
227 else
228 infer(seq_tier[i], 0);
229
230 if (current->decoder_model_info_present_flag) {
231 flags(decoder_model_present_for_this_op[i], 1, i);
232 if (current->decoder_model_present_for_this_op[i]) {
233 int n = current->decoder_model_info.buffer_delay_length_minus_1 + 1;
234 fbs(n, decoder_buffer_delay[i], 1, i);
235 fbs(n, encoder_buffer_delay[i], 1, i);
236 flags(low_delay_mode_flag[i], 1, i);
237 }
238 } else {
239 infer(decoder_model_present_for_this_op[i], 0);
240 }
241
242 if (current->initial_display_delay_present_flag) {
243 flags(initial_display_delay_present_for_this_op[i], 1, i);
244 if (current->initial_display_delay_present_for_this_op[i])
245 fbs(4, initial_display_delay_minus_1[i], 1, i);
246 }
247 }
248 }
249
250 fb(4, frame_width_bits_minus_1);
251 fb(4, frame_height_bits_minus_1);
252
253 fb(current->frame_width_bits_minus_1 + 1, max_frame_width_minus_1);
254 fb(current->frame_height_bits_minus_1 + 1, max_frame_height_minus_1);
255
256 if (current->reduced_still_picture_header)
257 infer(frame_id_numbers_present_flag, 0);
258 else
259 flag(frame_id_numbers_present_flag);
260 if (current->frame_id_numbers_present_flag) {
261 fb(4, delta_frame_id_length_minus_2);
262 fb(3, additional_frame_id_length_minus_1);
263 }
264
265 flag(use_128x128_superblock);
266 flag(enable_filter_intra);
267 flag(enable_intra_edge_filter);
268
269 if (current->reduced_still_picture_header) {
270 infer(enable_interintra_compound, 0);
271 infer(enable_masked_compound, 0);
272 infer(enable_warped_motion, 0);
273 infer(enable_dual_filter, 0);
274 infer(enable_order_hint, 0);
275 infer(enable_jnt_comp, 0);
276 infer(enable_ref_frame_mvs, 0);
277
278 infer(seq_force_screen_content_tools,
279 AV1_SELECT_SCREEN_CONTENT_TOOLS);
280 infer(seq_force_integer_mv,
281 AV1_SELECT_INTEGER_MV);
282 } else {
283 flag(enable_interintra_compound);
284 flag(enable_masked_compound);
285 flag(enable_warped_motion);
286 flag(enable_dual_filter);
287
288 flag(enable_order_hint);
289 if (current->enable_order_hint) {
290 flag(enable_jnt_comp);
291 flag(enable_ref_frame_mvs);
292 } else {
293 infer(enable_jnt_comp, 0);
294 infer(enable_ref_frame_mvs, 0);
295 }
296
297 flag(seq_choose_screen_content_tools);
298 if (current->seq_choose_screen_content_tools)
299 infer(seq_force_screen_content_tools,
300 AV1_SELECT_SCREEN_CONTENT_TOOLS);
301 else
302 fb(1, seq_force_screen_content_tools);
303 if (current->seq_force_screen_content_tools > 0) {
304 flag(seq_choose_integer_mv);
305 if (current->seq_choose_integer_mv)
306 infer(seq_force_integer_mv,
307 AV1_SELECT_INTEGER_MV);
308 else
309 fb(1, seq_force_integer_mv);
310 } else {
311 infer(seq_force_integer_mv, AV1_SELECT_INTEGER_MV);
312 }
313
314 if (current->enable_order_hint)
315 fb(3, order_hint_bits_minus_1);
316 }
317
318 flag(enable_superres);
319 flag(enable_cdef);
320 flag(enable_restoration);
321
322 CHECK(FUNC(color_config)(ctx, rw, ¤t->color_config,
323 current->seq_profile));
324
325 flag(film_grain_params_present);
326
327 return 0;
328 }
329
FUNC(temporal_delimiter_obu)330 static int FUNC(temporal_delimiter_obu)(CodedBitstreamContext *ctx, RWContext *rw)
331 {
332 CodedBitstreamAV1Context *priv = ctx->priv_data;
333
334 HEADER("Temporal Delimiter");
335
336 priv->seen_frame_header = 0;
337
338 return 0;
339 }
340
FUNC(set_frame_refs)341 static int FUNC(set_frame_refs)(CodedBitstreamContext *ctx, RWContext *rw,
342 AV1RawFrameHeader *current)
343 {
344 CodedBitstreamAV1Context *priv = ctx->priv_data;
345 const AV1RawSequenceHeader *seq = priv->sequence_header;
346 static const uint8_t ref_frame_list[AV1_NUM_REF_FRAMES - 2] = {
347 AV1_REF_FRAME_LAST2, AV1_REF_FRAME_LAST3, AV1_REF_FRAME_BWDREF,
348 AV1_REF_FRAME_ALTREF2, AV1_REF_FRAME_ALTREF
349 };
350 int8_t ref_frame_idx[AV1_REFS_PER_FRAME], used_frame[AV1_NUM_REF_FRAMES];
351 int8_t shifted_order_hints[AV1_NUM_REF_FRAMES];
352 int cur_frame_hint, latest_order_hint, earliest_order_hint, ref;
353 int i, j;
354
355 for (i = 0; i < AV1_REFS_PER_FRAME; i++)
356 ref_frame_idx[i] = -1;
357 ref_frame_idx[AV1_REF_FRAME_LAST - AV1_REF_FRAME_LAST] = current->last_frame_idx;
358 ref_frame_idx[AV1_REF_FRAME_GOLDEN - AV1_REF_FRAME_LAST] = current->golden_frame_idx;
359
360 for (i = 0; i < AV1_NUM_REF_FRAMES; i++)
361 used_frame[i] = 0;
362 used_frame[current->last_frame_idx] = 1;
363 used_frame[current->golden_frame_idx] = 1;
364
365 cur_frame_hint = 1 << (seq->order_hint_bits_minus_1);
366 for (i = 0; i < AV1_NUM_REF_FRAMES; i++)
367 shifted_order_hints[i] = cur_frame_hint +
368 cbs_av1_get_relative_dist(seq, priv->ref[i].order_hint,
369 priv->order_hint);
370
371 latest_order_hint = shifted_order_hints[current->last_frame_idx];
372 earliest_order_hint = shifted_order_hints[current->golden_frame_idx];
373
374 ref = -1;
375 for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
376 int hint = shifted_order_hints[i];
377 if (!used_frame[i] && hint >= cur_frame_hint &&
378 (ref < 0 || hint >= latest_order_hint)) {
379 ref = i;
380 latest_order_hint = hint;
381 }
382 }
383 if (ref >= 0) {
384 ref_frame_idx[AV1_REF_FRAME_ALTREF - AV1_REF_FRAME_LAST] = ref;
385 used_frame[ref] = 1;
386 }
387
388 ref = -1;
389 for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
390 int hint = shifted_order_hints[i];
391 if (!used_frame[i] && hint >= cur_frame_hint &&
392 (ref < 0 || hint < earliest_order_hint)) {
393 ref = i;
394 earliest_order_hint = hint;
395 }
396 }
397 if (ref >= 0) {
398 ref_frame_idx[AV1_REF_FRAME_BWDREF - AV1_REF_FRAME_LAST] = ref;
399 used_frame[ref] = 1;
400 }
401
402 ref = -1;
403 for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
404 int hint = shifted_order_hints[i];
405 if (!used_frame[i] && hint >= cur_frame_hint &&
406 (ref < 0 || hint < earliest_order_hint)) {
407 ref = i;
408 earliest_order_hint = hint;
409 }
410 }
411 if (ref >= 0) {
412 ref_frame_idx[AV1_REF_FRAME_ALTREF2 - AV1_REF_FRAME_LAST] = ref;
413 used_frame[ref] = 1;
414 }
415
416 for (i = 0; i < AV1_REFS_PER_FRAME - 2; i++) {
417 int ref_frame = ref_frame_list[i];
418 if (ref_frame_idx[ref_frame - AV1_REF_FRAME_LAST] < 0 ) {
419 ref = -1;
420 for (j = 0; j < AV1_NUM_REF_FRAMES; j++) {
421 int hint = shifted_order_hints[j];
422 if (!used_frame[j] && hint < cur_frame_hint &&
423 (ref < 0 || hint >= latest_order_hint)) {
424 ref = j;
425 latest_order_hint = hint;
426 }
427 }
428 if (ref >= 0) {
429 ref_frame_idx[ref_frame - AV1_REF_FRAME_LAST] = ref;
430 used_frame[ref] = 1;
431 }
432 }
433 }
434
435 ref = -1;
436 for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
437 int hint = shifted_order_hints[i];
438 if (ref < 0 || hint < earliest_order_hint) {
439 ref = i;
440 earliest_order_hint = hint;
441 }
442 }
443 for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
444 if (ref_frame_idx[i] < 0)
445 ref_frame_idx[i] = ref;
446 infer(ref_frame_idx[i], ref_frame_idx[i]);
447 }
448
449 return 0;
450 }
451
FUNC(superres_params)452 static int FUNC(superres_params)(CodedBitstreamContext *ctx, RWContext *rw,
453 AV1RawFrameHeader *current)
454 {
455 CodedBitstreamAV1Context *priv = ctx->priv_data;
456 const AV1RawSequenceHeader *seq = priv->sequence_header;
457 int denom, err;
458
459 if (seq->enable_superres)
460 flag(use_superres);
461 else
462 infer(use_superres, 0);
463
464 if (current->use_superres) {
465 fb(3, coded_denom);
466 denom = current->coded_denom + AV1_SUPERRES_DENOM_MIN;
467 } else {
468 denom = AV1_SUPERRES_NUM;
469 }
470
471 priv->upscaled_width = priv->frame_width;
472 priv->frame_width = (priv->upscaled_width * AV1_SUPERRES_NUM +
473 denom / 2) / denom;
474
475 return 0;
476 }
477
FUNC(frame_size)478 static int FUNC(frame_size)(CodedBitstreamContext *ctx, RWContext *rw,
479 AV1RawFrameHeader *current)
480 {
481 CodedBitstreamAV1Context *priv = ctx->priv_data;
482 const AV1RawSequenceHeader *seq = priv->sequence_header;
483 int err;
484
485 if (current->frame_size_override_flag) {
486 fb(seq->frame_width_bits_minus_1 + 1, frame_width_minus_1);
487 fb(seq->frame_height_bits_minus_1 + 1, frame_height_minus_1);
488
489 priv->frame_width = current->frame_width_minus_1 + 1;
490 priv->frame_height = current->frame_height_minus_1 + 1;
491 } else {
492 priv->frame_width = seq->max_frame_width_minus_1 + 1;
493 priv->frame_height = seq->max_frame_height_minus_1 + 1;
494 }
495
496 CHECK(FUNC(superres_params)(ctx, rw, current));
497
498 return 0;
499 }
500
FUNC(render_size)501 static int FUNC(render_size)(CodedBitstreamContext *ctx, RWContext *rw,
502 AV1RawFrameHeader *current)
503 {
504 CodedBitstreamAV1Context *priv = ctx->priv_data;
505 int err;
506
507 flag(render_and_frame_size_different);
508
509 if (current->render_and_frame_size_different) {
510 fb(16, render_width_minus_1);
511 fb(16, render_height_minus_1);
512
513 priv->render_width = current->render_width_minus_1 + 1;
514 priv->render_height = current->render_height_minus_1 + 1;
515 } else {
516 priv->render_width = priv->upscaled_width;
517 priv->render_height = priv->frame_height;
518 }
519
520 return 0;
521 }
522
FUNC(frame_size_with_refs)523 static int FUNC(frame_size_with_refs)(CodedBitstreamContext *ctx, RWContext *rw,
524 AV1RawFrameHeader *current)
525 {
526 CodedBitstreamAV1Context *priv = ctx->priv_data;
527 int i, err;
528
529 for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
530 flags(found_ref[i], 1, i);
531 if (current->found_ref[i]) {
532 AV1ReferenceFrameState *ref =
533 &priv->ref[current->ref_frame_idx[i]];
534
535 if (!ref->valid) {
536 av_log(ctx->log_ctx, AV_LOG_ERROR,
537 "Missing reference frame needed for frame size "
538 "(ref = %d, ref_frame_idx = %d).\n",
539 i, current->ref_frame_idx[i]);
540 return AVERROR_INVALIDDATA;
541 }
542
543 priv->upscaled_width = ref->upscaled_width;
544 priv->frame_width = priv->upscaled_width;
545 priv->frame_height = ref->frame_height;
546 priv->render_width = ref->render_width;
547 priv->render_height = ref->render_height;
548 break;
549 }
550 }
551
552 if (i >= AV1_REFS_PER_FRAME) {
553 CHECK(FUNC(frame_size)(ctx, rw, current));
554 CHECK(FUNC(render_size)(ctx, rw, current));
555 } else {
556 CHECK(FUNC(superres_params)(ctx, rw, current));
557 }
558
559 return 0;
560 }
561
FUNC(interpolation_filter)562 static int FUNC(interpolation_filter)(CodedBitstreamContext *ctx, RWContext *rw,
563 AV1RawFrameHeader *current)
564 {
565 int err;
566
567 flag(is_filter_switchable);
568 if (current->is_filter_switchable)
569 infer(interpolation_filter,
570 AV1_INTERPOLATION_FILTER_SWITCHABLE);
571 else
572 fb(2, interpolation_filter);
573
574 return 0;
575 }
576
FUNC(tile_info)577 static int FUNC(tile_info)(CodedBitstreamContext *ctx, RWContext *rw,
578 AV1RawFrameHeader *current)
579 {
580 CodedBitstreamAV1Context *priv = ctx->priv_data;
581 const AV1RawSequenceHeader *seq = priv->sequence_header;
582 int mi_cols, mi_rows, sb_cols, sb_rows, sb_shift, sb_size;
583 int max_tile_width_sb, max_tile_height_sb, max_tile_area_sb;
584 int min_log2_tile_cols, max_log2_tile_cols, max_log2_tile_rows;
585 int min_log2_tiles, min_log2_tile_rows;
586 int i, err;
587
588 mi_cols = 2 * ((priv->frame_width + 7) >> 3);
589 mi_rows = 2 * ((priv->frame_height + 7) >> 3);
590
591 sb_cols = seq->use_128x128_superblock ? ((mi_cols + 31) >> 5)
592 : ((mi_cols + 15) >> 4);
593 sb_rows = seq->use_128x128_superblock ? ((mi_rows + 31) >> 5)
594 : ((mi_rows + 15) >> 4);
595
596 sb_shift = seq->use_128x128_superblock ? 5 : 4;
597 sb_size = sb_shift + 2;
598
599 max_tile_width_sb = AV1_MAX_TILE_WIDTH >> sb_size;
600 max_tile_area_sb = AV1_MAX_TILE_AREA >> (2 * sb_size);
601
602 min_log2_tile_cols = cbs_av1_tile_log2(max_tile_width_sb, sb_cols);
603 max_log2_tile_cols = cbs_av1_tile_log2(1, FFMIN(sb_cols, AV1_MAX_TILE_COLS));
604 max_log2_tile_rows = cbs_av1_tile_log2(1, FFMIN(sb_rows, AV1_MAX_TILE_ROWS));
605 min_log2_tiles = FFMAX(min_log2_tile_cols,
606 cbs_av1_tile_log2(max_tile_area_sb, sb_rows * sb_cols));
607
608 flag(uniform_tile_spacing_flag);
609
610 if (current->uniform_tile_spacing_flag) {
611 int tile_width_sb, tile_height_sb;
612
613 increment(tile_cols_log2, min_log2_tile_cols, max_log2_tile_cols);
614
615 tile_width_sb = (sb_cols + (1 << current->tile_cols_log2) - 1) >>
616 current->tile_cols_log2;
617 current->tile_cols = (sb_cols + tile_width_sb - 1) / tile_width_sb;
618
619 min_log2_tile_rows = FFMAX(min_log2_tiles - current->tile_cols_log2, 0);
620
621 increment(tile_rows_log2, min_log2_tile_rows, max_log2_tile_rows);
622
623 tile_height_sb = (sb_rows + (1 << current->tile_rows_log2) - 1) >>
624 current->tile_rows_log2;
625 current->tile_rows = (sb_rows + tile_height_sb - 1) / tile_height_sb;
626
627 } else {
628 int widest_tile_sb, start_sb, size_sb, max_width, max_height;
629
630 widest_tile_sb = 0;
631
632 start_sb = 0;
633 for (i = 0; start_sb < sb_cols && i < AV1_MAX_TILE_COLS; i++) {
634 max_width = FFMIN(sb_cols - start_sb, max_tile_width_sb);
635 ns(max_width, width_in_sbs_minus_1[i], 1, i);
636 size_sb = current->width_in_sbs_minus_1[i] + 1;
637 widest_tile_sb = FFMAX(size_sb, widest_tile_sb);
638 start_sb += size_sb;
639 }
640 current->tile_cols_log2 = cbs_av1_tile_log2(1, i);
641 current->tile_cols = i;
642
643 if (min_log2_tiles > 0)
644 max_tile_area_sb = (sb_rows * sb_cols) >> (min_log2_tiles + 1);
645 else
646 max_tile_area_sb = sb_rows * sb_cols;
647 max_tile_height_sb = FFMAX(max_tile_area_sb / widest_tile_sb, 1);
648
649 start_sb = 0;
650 for (i = 0; start_sb < sb_rows && i < AV1_MAX_TILE_ROWS; i++) {
651 max_height = FFMIN(sb_rows - start_sb, max_tile_height_sb);
652 ns(max_height, height_in_sbs_minus_1[i], 1, i);
653 size_sb = current->height_in_sbs_minus_1[i] + 1;
654 start_sb += size_sb;
655 }
656 current->tile_rows_log2 = cbs_av1_tile_log2(1, i);
657 current->tile_rows = i;
658 }
659
660 if (current->tile_cols_log2 > 0 ||
661 current->tile_rows_log2 > 0) {
662 fb(current->tile_cols_log2 + current->tile_rows_log2,
663 context_update_tile_id);
664 fb(2, tile_size_bytes_minus1);
665 } else {
666 infer(context_update_tile_id, 0);
667 }
668
669 priv->tile_cols = current->tile_cols;
670 priv->tile_rows = current->tile_rows;
671
672 return 0;
673 }
674
FUNC(quantization_params)675 static int FUNC(quantization_params)(CodedBitstreamContext *ctx, RWContext *rw,
676 AV1RawFrameHeader *current)
677 {
678 CodedBitstreamAV1Context *priv = ctx->priv_data;
679 const AV1RawSequenceHeader *seq = priv->sequence_header;
680 int err;
681
682 fb(8, base_q_idx);
683
684 delta_q(delta_q_y_dc);
685
686 if (priv->num_planes > 1) {
687 if (seq->color_config.separate_uv_delta_q)
688 flag(diff_uv_delta);
689 else
690 infer(diff_uv_delta, 0);
691
692 delta_q(delta_q_u_dc);
693 delta_q(delta_q_u_ac);
694
695 if (current->diff_uv_delta) {
696 delta_q(delta_q_v_dc);
697 delta_q(delta_q_v_ac);
698 } else {
699 infer(delta_q_v_dc, current->delta_q_u_dc);
700 infer(delta_q_v_ac, current->delta_q_u_ac);
701 }
702 } else {
703 infer(delta_q_u_dc, 0);
704 infer(delta_q_u_ac, 0);
705 infer(delta_q_v_dc, 0);
706 infer(delta_q_v_ac, 0);
707 }
708
709 flag(using_qmatrix);
710 if (current->using_qmatrix) {
711 fb(4, qm_y);
712 fb(4, qm_u);
713 if (seq->color_config.separate_uv_delta_q)
714 fb(4, qm_v);
715 else
716 infer(qm_v, current->qm_u);
717 }
718
719 return 0;
720 }
721
FUNC(segmentation_params)722 static int FUNC(segmentation_params)(CodedBitstreamContext *ctx, RWContext *rw,
723 AV1RawFrameHeader *current)
724 {
725 static const uint8_t bits[AV1_SEG_LVL_MAX] = { 8, 6, 6, 6, 6, 3, 0, 0 };
726 static const uint8_t sign[AV1_SEG_LVL_MAX] = { 1, 1, 1, 1, 1, 0, 0, 0 };
727 int i, j, err;
728
729 flag(segmentation_enabled);
730
731 if (current->segmentation_enabled) {
732 if (current->primary_ref_frame == AV1_PRIMARY_REF_NONE) {
733 infer(segmentation_update_map, 1);
734 infer(segmentation_temporal_update, 0);
735 infer(segmentation_update_data, 1);
736 } else {
737 flag(segmentation_update_map);
738 if (current->segmentation_update_map)
739 flag(segmentation_temporal_update);
740 else
741 infer(segmentation_temporal_update, 0);
742 flag(segmentation_update_data);
743 }
744
745 if (current->segmentation_update_data) {
746 for (i = 0; i < AV1_MAX_SEGMENTS; i++) {
747 for (j = 0; j < AV1_SEG_LVL_MAX; j++) {
748 flags(feature_enabled[i][j], 2, i, j);
749
750 if (current->feature_enabled[i][j] && bits[j] > 0) {
751 if (sign[j])
752 sus(1 + bits[j], feature_value[i][j], 2, i, j);
753 else
754 fbs(bits[j], feature_value[i][j], 2, i, j);
755 } else {
756 infer(feature_value[i][j], 0);
757 }
758 }
759 }
760 }
761 } else {
762 for (i = 0; i < AV1_MAX_SEGMENTS; i++) {
763 for (j = 0; j < AV1_SEG_LVL_MAX; j++) {
764 infer(feature_enabled[i][j], 0);
765 infer(feature_value[i][j], 0);
766 }
767 }
768 }
769
770 return 0;
771 }
772
FUNC(delta_q_params)773 static int FUNC(delta_q_params)(CodedBitstreamContext *ctx, RWContext *rw,
774 AV1RawFrameHeader *current)
775 {
776 int err;
777
778 if (current->base_q_idx > 0)
779 flag(delta_q_present);
780 else
781 infer(delta_q_present, 0);
782
783 if (current->delta_q_present)
784 fb(2, delta_q_res);
785
786 return 0;
787 }
788
FUNC(delta_lf_params)789 static int FUNC(delta_lf_params)(CodedBitstreamContext *ctx, RWContext *rw,
790 AV1RawFrameHeader *current)
791 {
792 int err;
793
794 if (current->delta_q_present) {
795 if (!current->allow_intrabc)
796 flag(delta_lf_present);
797 else
798 infer(delta_lf_present, 0);
799 if (current->delta_lf_present) {
800 fb(2, delta_lf_res);
801 flag(delta_lf_multi);
802 } else {
803 infer(delta_lf_res, 0);
804 infer(delta_lf_multi, 0);
805 }
806 } else {
807 infer(delta_lf_present, 0);
808 infer(delta_lf_res, 0);
809 infer(delta_lf_multi, 0);
810 }
811
812 return 0;
813 }
814
FUNC(loop_filter_params)815 static int FUNC(loop_filter_params)(CodedBitstreamContext *ctx, RWContext *rw,
816 AV1RawFrameHeader *current)
817 {
818 CodedBitstreamAV1Context *priv = ctx->priv_data;
819 int i, err;
820
821 if (priv->coded_lossless || current->allow_intrabc) {
822 infer(loop_filter_level[0], 0);
823 infer(loop_filter_level[1], 0);
824 infer(loop_filter_ref_deltas[AV1_REF_FRAME_INTRA], 1);
825 infer(loop_filter_ref_deltas[AV1_REF_FRAME_LAST], 0);
826 infer(loop_filter_ref_deltas[AV1_REF_FRAME_LAST2], 0);
827 infer(loop_filter_ref_deltas[AV1_REF_FRAME_LAST3], 0);
828 infer(loop_filter_ref_deltas[AV1_REF_FRAME_BWDREF], 0);
829 infer(loop_filter_ref_deltas[AV1_REF_FRAME_GOLDEN], -1);
830 infer(loop_filter_ref_deltas[AV1_REF_FRAME_ALTREF], -1);
831 infer(loop_filter_ref_deltas[AV1_REF_FRAME_ALTREF2], -1);
832 for (i = 0; i < 2; i++)
833 infer(loop_filter_mode_deltas[i], 0);
834 return 0;
835 }
836
837 fb(6, loop_filter_level[0]);
838 fb(6, loop_filter_level[1]);
839
840 if (priv->num_planes > 1) {
841 if (current->loop_filter_level[0] ||
842 current->loop_filter_level[1]) {
843 fb(6, loop_filter_level[2]);
844 fb(6, loop_filter_level[3]);
845 }
846 }
847
848 fb(3, loop_filter_sharpness);
849
850 flag(loop_filter_delta_enabled);
851 if (current->loop_filter_delta_enabled) {
852 flag(loop_filter_delta_update);
853 if (current->loop_filter_delta_update) {
854 for (i = 0; i < AV1_TOTAL_REFS_PER_FRAME; i++) {
855 flags(update_ref_delta[i], 1, i);
856 if (current->update_ref_delta[i])
857 sus(1 + 6, loop_filter_ref_deltas[i], 1, i);
858 }
859 for (i = 0; i < 2; i++) {
860 flags(update_mode_delta[i], 1, i);
861 if (current->update_mode_delta[i])
862 sus(1 + 6, loop_filter_mode_deltas[i], 1, i);
863 }
864 }
865 }
866
867 return 0;
868 }
869
FUNC(cdef_params)870 static int FUNC(cdef_params)(CodedBitstreamContext *ctx, RWContext *rw,
871 AV1RawFrameHeader *current)
872 {
873 CodedBitstreamAV1Context *priv = ctx->priv_data;
874 const AV1RawSequenceHeader *seq = priv->sequence_header;
875 int i, err;
876
877 if (priv->coded_lossless || current->allow_intrabc ||
878 !seq->enable_cdef) {
879 infer(cdef_damping_minus_3, 0);
880 infer(cdef_bits, 0);
881 infer(cdef_y_pri_strength[0], 0);
882 infer(cdef_y_sec_strength[0], 0);
883 infer(cdef_uv_pri_strength[0], 0);
884 infer(cdef_uv_sec_strength[0], 0);
885
886 return 0;
887 }
888
889 fb(2, cdef_damping_minus_3);
890 fb(2, cdef_bits);
891
892 for (i = 0; i < (1 << current->cdef_bits); i++) {
893 fbs(4, cdef_y_pri_strength[i], 1, i);
894 fbs(2, cdef_y_sec_strength[i], 1, i);
895
896 if (priv->num_planes > 1) {
897 fbs(4, cdef_uv_pri_strength[i], 1, i);
898 fbs(2, cdef_uv_sec_strength[i], 1, i);
899 }
900 }
901
902 return 0;
903 }
904
FUNC(lr_params)905 static int FUNC(lr_params)(CodedBitstreamContext *ctx, RWContext *rw,
906 AV1RawFrameHeader *current)
907 {
908 CodedBitstreamAV1Context *priv = ctx->priv_data;
909 const AV1RawSequenceHeader *seq = priv->sequence_header;
910 int uses_lr, uses_chroma_lr;
911 int i, err;
912
913 if (priv->all_lossless || current->allow_intrabc ||
914 !seq->enable_restoration) {
915 return 0;
916 }
917
918 uses_lr = uses_chroma_lr = 0;
919 for (i = 0; i < priv->num_planes; i++) {
920 fbs(2, lr_type[i], 1, i);
921
922 if (current->lr_type[i] != 0) {
923 uses_lr = 1;
924 if (i > 0)
925 uses_chroma_lr = 1;
926 }
927 }
928
929 if (uses_lr) {
930 if (seq->use_128x128_superblock)
931 increment(lr_unit_shift, 1, 2);
932 else
933 increment(lr_unit_shift, 0, 2);
934
935 if(seq->color_config.subsampling_x &&
936 seq->color_config.subsampling_y && uses_chroma_lr) {
937 fb(1, lr_uv_shift);
938 } else {
939 infer(lr_uv_shift, 0);
940 }
941 }
942
943 return 0;
944 }
945
FUNC(read_tx_mode)946 static int FUNC(read_tx_mode)(CodedBitstreamContext *ctx, RWContext *rw,
947 AV1RawFrameHeader *current)
948 {
949 CodedBitstreamAV1Context *priv = ctx->priv_data;
950 int err;
951
952 if (priv->coded_lossless)
953 infer(tx_mode, 0);
954 else
955 increment(tx_mode, 1, 2);
956
957 return 0;
958 }
959
FUNC(frame_reference_mode)960 static int FUNC(frame_reference_mode)(CodedBitstreamContext *ctx, RWContext *rw,
961 AV1RawFrameHeader *current)
962 {
963 int err;
964
965 if (current->frame_type == AV1_FRAME_INTRA_ONLY ||
966 current->frame_type == AV1_FRAME_KEY)
967 infer(reference_select, 0);
968 else
969 flag(reference_select);
970
971 return 0;
972 }
973
FUNC(skip_mode_params)974 static int FUNC(skip_mode_params)(CodedBitstreamContext *ctx, RWContext *rw,
975 AV1RawFrameHeader *current)
976 {
977 CodedBitstreamAV1Context *priv = ctx->priv_data;
978 const AV1RawSequenceHeader *seq = priv->sequence_header;
979 int skip_mode_allowed;
980 int err;
981
982 if (current->frame_type == AV1_FRAME_KEY ||
983 current->frame_type == AV1_FRAME_INTRA_ONLY ||
984 !current->reference_select || !seq->enable_order_hint) {
985 skip_mode_allowed = 0;
986 } else {
987 int forward_idx, backward_idx;
988 int forward_hint, backward_hint;
989 int ref_hint, dist, i;
990
991 forward_idx = -1;
992 backward_idx = -1;
993 for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
994 ref_hint = priv->ref[current->ref_frame_idx[i]].order_hint;
995 dist = cbs_av1_get_relative_dist(seq, ref_hint,
996 priv->order_hint);
997 if (dist < 0) {
998 if (forward_idx < 0 ||
999 cbs_av1_get_relative_dist(seq, ref_hint,
1000 forward_hint) > 0) {
1001 forward_idx = i;
1002 forward_hint = ref_hint;
1003 }
1004 } else if (dist > 0) {
1005 if (backward_idx < 0 ||
1006 cbs_av1_get_relative_dist(seq, ref_hint,
1007 backward_hint) < 0) {
1008 backward_idx = i;
1009 backward_hint = ref_hint;
1010 }
1011 }
1012 }
1013
1014 if (forward_idx < 0) {
1015 skip_mode_allowed = 0;
1016 } else if (backward_idx >= 0) {
1017 skip_mode_allowed = 1;
1018 // Frames for skip mode are forward_idx and backward_idx.
1019 } else {
1020 int second_forward_idx;
1021 int second_forward_hint;
1022
1023 second_forward_idx = -1;
1024 for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
1025 ref_hint = priv->ref[current->ref_frame_idx[i]].order_hint;
1026 if (cbs_av1_get_relative_dist(seq, ref_hint,
1027 forward_hint) < 0) {
1028 if (second_forward_idx < 0 ||
1029 cbs_av1_get_relative_dist(seq, ref_hint,
1030 second_forward_hint) > 0) {
1031 second_forward_idx = i;
1032 second_forward_hint = ref_hint;
1033 }
1034 }
1035 }
1036
1037 if (second_forward_idx < 0) {
1038 skip_mode_allowed = 0;
1039 } else {
1040 skip_mode_allowed = 1;
1041 // Frames for skip mode are forward_idx and second_forward_idx.
1042 }
1043 }
1044 }
1045
1046 if (skip_mode_allowed)
1047 flag(skip_mode_present);
1048 else
1049 infer(skip_mode_present, 0);
1050
1051 return 0;
1052 }
1053
FUNC(global_motion_param)1054 static int FUNC(global_motion_param)(CodedBitstreamContext *ctx, RWContext *rw,
1055 AV1RawFrameHeader *current,
1056 int type, int ref, int idx)
1057 {
1058 uint32_t abs_bits, prec_bits, num_syms;
1059 int err;
1060
1061 if (idx < 2) {
1062 if (type == AV1_WARP_MODEL_TRANSLATION) {
1063 abs_bits = AV1_GM_ABS_TRANS_ONLY_BITS - !current->allow_high_precision_mv;
1064 prec_bits = AV1_GM_TRANS_ONLY_PREC_BITS - !current->allow_high_precision_mv;
1065 } else {
1066 abs_bits = AV1_GM_ABS_TRANS_BITS;
1067 prec_bits = AV1_GM_TRANS_PREC_BITS;
1068 }
1069 } else {
1070 abs_bits = AV1_GM_ABS_ALPHA_BITS;
1071 prec_bits = AV1_GM_ALPHA_PREC_BITS;
1072 }
1073
1074 num_syms = 2 * (1 << abs_bits) + 1;
1075 subexp(gm_params[ref][idx], num_syms, 2, ref, idx);
1076
1077 // Actual gm_params value is not reconstructed here.
1078 (void)prec_bits;
1079
1080 return 0;
1081 }
1082
FUNC(global_motion_params)1083 static int FUNC(global_motion_params)(CodedBitstreamContext *ctx, RWContext *rw,
1084 AV1RawFrameHeader *current)
1085 {
1086 int ref, type;
1087 int err;
1088
1089 if (current->frame_type == AV1_FRAME_KEY ||
1090 current->frame_type == AV1_FRAME_INTRA_ONLY)
1091 return 0;
1092
1093 for (ref = AV1_REF_FRAME_LAST; ref <= AV1_REF_FRAME_ALTREF; ref++) {
1094 flags(is_global[ref], 1, ref);
1095 if (current->is_global[ref]) {
1096 flags(is_rot_zoom[ref], 1, ref);
1097 if (current->is_rot_zoom[ref]) {
1098 type = AV1_WARP_MODEL_ROTZOOM;
1099 } else {
1100 flags(is_translation[ref], 1, ref);
1101 type = current->is_translation[ref] ? AV1_WARP_MODEL_TRANSLATION
1102 : AV1_WARP_MODEL_AFFINE;
1103 }
1104 } else {
1105 type = AV1_WARP_MODEL_IDENTITY;
1106 }
1107
1108 if (type >= AV1_WARP_MODEL_ROTZOOM) {
1109 CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 2));
1110 CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 3));
1111 if (type == AV1_WARP_MODEL_AFFINE) {
1112 CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 4));
1113 CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 5));
1114 } else {
1115 // gm_params[ref][4] = -gm_params[ref][3]
1116 // gm_params[ref][5] = gm_params[ref][2]
1117 }
1118 }
1119 if (type >= AV1_WARP_MODEL_TRANSLATION) {
1120 CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 0));
1121 CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 1));
1122 }
1123 }
1124
1125 return 0;
1126 }
1127
FUNC(film_grain_params)1128 static int FUNC(film_grain_params)(CodedBitstreamContext *ctx, RWContext *rw,
1129 AV1RawFrameHeader *current)
1130 {
1131 CodedBitstreamAV1Context *priv = ctx->priv_data;
1132 const AV1RawSequenceHeader *seq = priv->sequence_header;
1133 int num_pos_luma, num_pos_chroma;
1134 int i, err;
1135
1136 if (!seq->film_grain_params_present ||
1137 (!current->show_frame && !current->showable_frame))
1138 return 0;
1139
1140 flag(apply_grain);
1141
1142 if (!current->apply_grain)
1143 return 0;
1144
1145 fb(16, grain_seed);
1146
1147 if (current->frame_type == AV1_FRAME_INTER)
1148 flag(update_grain);
1149 else
1150 infer(update_grain, 1);
1151
1152 if (!current->update_grain) {
1153 fb(3, film_grain_params_ref_idx);
1154 return 0;
1155 }
1156
1157 fc(4, num_y_points, 0, 14);
1158 for (i = 0; i < current->num_y_points; i++) {
1159 fcs(8, point_y_value[i],
1160 i ? current->point_y_value[i - 1] + 1 : 0,
1161 MAX_UINT_BITS(8) - (current->num_y_points - i - 1),
1162 1, i);
1163 fbs(8, point_y_scaling[i], 1, i);
1164 }
1165
1166 if (seq->color_config.mono_chrome)
1167 infer(chroma_scaling_from_luma, 0);
1168 else
1169 flag(chroma_scaling_from_luma);
1170
1171 if (seq->color_config.mono_chrome ||
1172 current->chroma_scaling_from_luma ||
1173 (seq->color_config.subsampling_x == 1 &&
1174 seq->color_config.subsampling_y == 1 &&
1175 current->num_y_points == 0)) {
1176 infer(num_cb_points, 0);
1177 infer(num_cr_points, 0);
1178 } else {
1179 fc(4, num_cb_points, 0, 10);
1180 for (i = 0; i < current->num_cb_points; i++) {
1181 fcs(8, point_cb_value[i],
1182 i ? current->point_cb_value[i - 1] + 1 : 0,
1183 MAX_UINT_BITS(8) - (current->num_cb_points - i - 1),
1184 1, i);
1185 fbs(8, point_cb_scaling[i], 1, i);
1186 }
1187 fc(4, num_cr_points, 0, 10);
1188 for (i = 0; i < current->num_cr_points; i++) {
1189 fcs(8, point_cr_value[i],
1190 i ? current->point_cr_value[i - 1] + 1 : 0,
1191 MAX_UINT_BITS(8) - (current->num_cr_points - i - 1),
1192 1, i);
1193 fbs(8, point_cr_scaling[i], 1, i);
1194 }
1195 }
1196
1197 fb(2, grain_scaling_minus_8);
1198 fb(2, ar_coeff_lag);
1199 num_pos_luma = 2 * current->ar_coeff_lag * (current->ar_coeff_lag + 1);
1200 if (current->num_y_points) {
1201 num_pos_chroma = num_pos_luma + 1;
1202 for (i = 0; i < num_pos_luma; i++)
1203 fbs(8, ar_coeffs_y_plus_128[i], 1, i);
1204 } else {
1205 num_pos_chroma = num_pos_luma;
1206 }
1207 if (current->chroma_scaling_from_luma || current->num_cb_points) {
1208 for (i = 0; i < num_pos_chroma; i++)
1209 fbs(8, ar_coeffs_cb_plus_128[i], 1, i);
1210 }
1211 if (current->chroma_scaling_from_luma || current->num_cr_points) {
1212 for (i = 0; i < num_pos_chroma; i++)
1213 fbs(8, ar_coeffs_cr_plus_128[i], 1, i);
1214 }
1215 fb(2, ar_coeff_shift_minus_6);
1216 fb(2, grain_scale_shift);
1217 if (current->num_cb_points) {
1218 fb(8, cb_mult);
1219 fb(8, cb_luma_mult);
1220 fb(9, cb_offset);
1221 }
1222 if (current->num_cr_points) {
1223 fb(8, cr_mult);
1224 fb(8, cr_luma_mult);
1225 fb(9, cr_offset);
1226 }
1227
1228 flag(overlap_flag);
1229 flag(clip_to_restricted_range);
1230
1231 return 0;
1232 }
1233
FUNC(uncompressed_header)1234 static int FUNC(uncompressed_header)(CodedBitstreamContext *ctx, RWContext *rw,
1235 AV1RawFrameHeader *current)
1236 {
1237 CodedBitstreamAV1Context *priv = ctx->priv_data;
1238 const AV1RawSequenceHeader *seq;
1239 int id_len, diff_len, all_frames, frame_is_intra, order_hint_bits;
1240 int i, err;
1241
1242 if (!priv->sequence_header) {
1243 av_log(ctx->log_ctx, AV_LOG_ERROR, "No sequence header available: "
1244 "unable to decode frame header.\n");
1245 return AVERROR_INVALIDDATA;
1246 }
1247 seq = priv->sequence_header;
1248
1249 id_len = seq->additional_frame_id_length_minus_1 +
1250 seq->delta_frame_id_length_minus_2 + 3;
1251 all_frames = (1 << AV1_NUM_REF_FRAMES) - 1;
1252
1253 if (seq->reduced_still_picture_header) {
1254 infer(show_existing_frame, 0);
1255 infer(frame_type, AV1_FRAME_KEY);
1256 infer(show_frame, 1);
1257 infer(showable_frame, 0);
1258 frame_is_intra = 1;
1259
1260 } else {
1261 flag(show_existing_frame);
1262
1263 if (current->show_existing_frame) {
1264 AV1ReferenceFrameState *ref;
1265
1266 fb(3, frame_to_show_map_idx);
1267 ref = &priv->ref[current->frame_to_show_map_idx];
1268
1269 if (seq->decoder_model_info_present_flag &&
1270 !seq->timing_info.equal_picture_interval) {
1271 fb(seq->decoder_model_info.frame_presentation_time_length_minus_1 + 1,
1272 frame_presentation_time);
1273 }
1274
1275 if (seq->frame_id_numbers_present_flag)
1276 fb(id_len, display_frame_id);
1277
1278 infer(frame_type, ref->frame_type);
1279 if (current->frame_type == AV1_FRAME_KEY) {
1280 infer(refresh_frame_flags, all_frames);
1281
1282 // Section 7.21
1283 infer(current_frame_id, ref->frame_id);
1284 priv->upscaled_width = ref->upscaled_width;
1285 priv->frame_width = ref->frame_width;
1286 priv->frame_height = ref->frame_height;
1287 priv->render_width = ref->render_width;
1288 priv->render_height = ref->render_height;
1289 priv->bit_depth = ref->bit_depth;
1290 priv->order_hint = ref->order_hint;
1291 } else
1292 infer(refresh_frame_flags, 0);
1293
1294 // Section 7.20
1295 goto update_refs;
1296 }
1297
1298 fb(2, frame_type);
1299 frame_is_intra = (current->frame_type == AV1_FRAME_INTRA_ONLY ||
1300 current->frame_type == AV1_FRAME_KEY);
1301
1302 flag(show_frame);
1303 if (current->show_frame &&
1304 seq->decoder_model_info_present_flag &&
1305 !seq->timing_info.equal_picture_interval) {
1306 fb(seq->decoder_model_info.frame_presentation_time_length_minus_1 + 1,
1307 frame_presentation_time);
1308 }
1309 if (current->show_frame)
1310 infer(showable_frame, current->frame_type != AV1_FRAME_KEY);
1311 else
1312 flag(showable_frame);
1313
1314 if (current->frame_type == AV1_FRAME_SWITCH ||
1315 (current->frame_type == AV1_FRAME_KEY && current->show_frame))
1316 infer(error_resilient_mode, 1);
1317 else
1318 flag(error_resilient_mode);
1319 }
1320
1321 if (current->frame_type == AV1_FRAME_KEY && current->show_frame) {
1322 for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
1323 priv->ref[i].valid = 0;
1324 priv->ref[i].order_hint = 0;
1325 }
1326 }
1327
1328 flag(disable_cdf_update);
1329
1330 if (seq->seq_force_screen_content_tools ==
1331 AV1_SELECT_SCREEN_CONTENT_TOOLS) {
1332 flag(allow_screen_content_tools);
1333 } else {
1334 infer(allow_screen_content_tools,
1335 seq->seq_force_screen_content_tools);
1336 }
1337 if (current->allow_screen_content_tools) {
1338 if (seq->seq_force_integer_mv == AV1_SELECT_INTEGER_MV)
1339 flag(force_integer_mv);
1340 else
1341 infer(force_integer_mv, seq->seq_force_integer_mv);
1342 } else {
1343 infer(force_integer_mv, 0);
1344 }
1345
1346 if (seq->frame_id_numbers_present_flag) {
1347 fb(id_len, current_frame_id);
1348
1349 diff_len = seq->delta_frame_id_length_minus_2 + 2;
1350 for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
1351 if (current->current_frame_id > (1 << diff_len)) {
1352 if (priv->ref[i].frame_id > current->current_frame_id ||
1353 priv->ref[i].frame_id < (current->current_frame_id -
1354 (1 << diff_len)))
1355 priv->ref[i].valid = 0;
1356 } else {
1357 if (priv->ref[i].frame_id > current->current_frame_id &&
1358 priv->ref[i].frame_id < ((1 << id_len) +
1359 current->current_frame_id -
1360 (1 << diff_len)))
1361 priv->ref[i].valid = 0;
1362 }
1363 }
1364 } else {
1365 infer(current_frame_id, 0);
1366 }
1367
1368 if (current->frame_type == AV1_FRAME_SWITCH)
1369 infer(frame_size_override_flag, 1);
1370 else if(seq->reduced_still_picture_header)
1371 infer(frame_size_override_flag, 0);
1372 else
1373 flag(frame_size_override_flag);
1374
1375 order_hint_bits =
1376 seq->enable_order_hint ? seq->order_hint_bits_minus_1 + 1 : 0;
1377 if (order_hint_bits > 0)
1378 fb(order_hint_bits, order_hint);
1379 else
1380 infer(order_hint, 0);
1381 priv->order_hint = current->order_hint;
1382
1383 if (frame_is_intra || current->error_resilient_mode)
1384 infer(primary_ref_frame, AV1_PRIMARY_REF_NONE);
1385 else
1386 fb(3, primary_ref_frame);
1387
1388 if (seq->decoder_model_info_present_flag) {
1389 flag(buffer_removal_time_present_flag);
1390 if (current->buffer_removal_time_present_flag) {
1391 for (i = 0; i <= seq->operating_points_cnt_minus_1; i++) {
1392 if (seq->decoder_model_present_for_this_op[i]) {
1393 int op_pt_idc = seq->operating_point_idc[i];
1394 int in_temporal_layer = (op_pt_idc >> priv->temporal_id ) & 1;
1395 int in_spatial_layer = (op_pt_idc >> (priv->spatial_id + 8)) & 1;
1396 if (seq->operating_point_idc[i] == 0 ||
1397 (in_temporal_layer && in_spatial_layer)) {
1398 fbs(seq->decoder_model_info.buffer_removal_time_length_minus_1 + 1,
1399 buffer_removal_time[i], 1, i);
1400 }
1401 }
1402 }
1403 }
1404 }
1405
1406 if (current->frame_type == AV1_FRAME_SWITCH ||
1407 (current->frame_type == AV1_FRAME_KEY && current->show_frame))
1408 infer(refresh_frame_flags, all_frames);
1409 else
1410 fb(8, refresh_frame_flags);
1411
1412 if (!frame_is_intra || current->refresh_frame_flags != all_frames) {
1413 if (current->error_resilient_mode && seq->enable_order_hint) {
1414 for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
1415 fbs(order_hint_bits, ref_order_hint[i], 1, i);
1416 if (current->ref_order_hint[i] != priv->ref[i].order_hint)
1417 priv->ref[i].valid = 0;
1418 }
1419 }
1420 }
1421
1422 if (current->frame_type == AV1_FRAME_KEY ||
1423 current->frame_type == AV1_FRAME_INTRA_ONLY) {
1424 CHECK(FUNC(frame_size)(ctx, rw, current));
1425 CHECK(FUNC(render_size)(ctx, rw, current));
1426
1427 if (current->allow_screen_content_tools &&
1428 priv->upscaled_width == priv->frame_width)
1429 flag(allow_intrabc);
1430 else
1431 infer(allow_intrabc, 0);
1432
1433 } else {
1434 if (!seq->enable_order_hint) {
1435 infer(frame_refs_short_signaling, 0);
1436 } else {
1437 flag(frame_refs_short_signaling);
1438 if (current->frame_refs_short_signaling) {
1439 fb(3, last_frame_idx);
1440 fb(3, golden_frame_idx);
1441 CHECK(FUNC(set_frame_refs)(ctx, rw, current));
1442 }
1443 }
1444
1445 for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
1446 if (!current->frame_refs_short_signaling)
1447 fbs(3, ref_frame_idx[i], 1, i);
1448 if (seq->frame_id_numbers_present_flag) {
1449 fbs(seq->delta_frame_id_length_minus_2 + 2,
1450 delta_frame_id_minus1[i], 1, i);
1451 }
1452 }
1453
1454 if (current->frame_size_override_flag &&
1455 !current->error_resilient_mode) {
1456 CHECK(FUNC(frame_size_with_refs)(ctx, rw, current));
1457 } else {
1458 CHECK(FUNC(frame_size)(ctx, rw, current));
1459 CHECK(FUNC(render_size)(ctx, rw, current));
1460 }
1461
1462 if (current->force_integer_mv)
1463 infer(allow_high_precision_mv, 0);
1464 else
1465 flag(allow_high_precision_mv);
1466
1467 CHECK(FUNC(interpolation_filter)(ctx, rw, current));
1468
1469 flag(is_motion_mode_switchable);
1470
1471 if (current->error_resilient_mode ||
1472 !seq->enable_ref_frame_mvs)
1473 infer(use_ref_frame_mvs, 0);
1474 else
1475 flag(use_ref_frame_mvs);
1476
1477 infer(allow_intrabc, 0);
1478 }
1479
1480 if (!frame_is_intra) {
1481 // Derive reference frame sign biases.
1482 }
1483
1484 if (seq->reduced_still_picture_header || current->disable_cdf_update)
1485 infer(disable_frame_end_update_cdf, 1);
1486 else
1487 flag(disable_frame_end_update_cdf);
1488
1489 if (current->primary_ref_frame == AV1_PRIMARY_REF_NONE) {
1490 // Init non-coeff CDFs.
1491 // Setup past independence.
1492 } else {
1493 // Load CDF tables from previous frame.
1494 // Load params from previous frame.
1495 }
1496
1497 if (current->use_ref_frame_mvs) {
1498 // Perform motion field estimation process.
1499 }
1500
1501 CHECK(FUNC(tile_info)(ctx, rw, current));
1502
1503 CHECK(FUNC(quantization_params)(ctx, rw, current));
1504
1505 CHECK(FUNC(segmentation_params)(ctx, rw, current));
1506
1507 CHECK(FUNC(delta_q_params)(ctx, rw, current));
1508
1509 CHECK(FUNC(delta_lf_params)(ctx, rw, current));
1510
1511 // Init coeff CDFs / load previous segments.
1512
1513 priv->coded_lossless = 1;
1514 for (i = 0; i < AV1_MAX_SEGMENTS; i++) {
1515 int qindex;
1516 if (current->feature_enabled[i][AV1_SEG_LVL_ALT_Q]) {
1517 qindex = (current->base_q_idx +
1518 current->feature_value[i][AV1_SEG_LVL_ALT_Q]);
1519 } else {
1520 qindex = current->base_q_idx;
1521 }
1522 qindex = av_clip_uintp2(qindex, 8);
1523
1524 if (qindex || current->delta_q_y_dc ||
1525 current->delta_q_u_ac || current->delta_q_u_dc ||
1526 current->delta_q_v_ac || current->delta_q_v_dc) {
1527 priv->coded_lossless = 0;
1528 }
1529 }
1530 priv->all_lossless = priv->coded_lossless &&
1531 priv->frame_width == priv->upscaled_width;
1532
1533 CHECK(FUNC(loop_filter_params)(ctx, rw, current));
1534
1535 CHECK(FUNC(cdef_params)(ctx, rw, current));
1536
1537 CHECK(FUNC(lr_params)(ctx, rw, current));
1538
1539 CHECK(FUNC(read_tx_mode)(ctx, rw, current));
1540
1541 CHECK(FUNC(frame_reference_mode)(ctx, rw, current));
1542
1543 CHECK(FUNC(skip_mode_params)(ctx, rw, current));
1544
1545 if (frame_is_intra || current->error_resilient_mode ||
1546 !seq->enable_warped_motion)
1547 infer(allow_warped_motion, 0);
1548 else
1549 flag(allow_warped_motion);
1550
1551 flag(reduced_tx_set);
1552
1553 CHECK(FUNC(global_motion_params)(ctx, rw, current));
1554
1555 CHECK(FUNC(film_grain_params)(ctx, rw, current));
1556
1557 av_log(ctx->log_ctx, AV_LOG_DEBUG, "Frame %d: size %dx%d "
1558 "upscaled %d render %dx%d subsample %dx%d "
1559 "bitdepth %d tiles %dx%d.\n", priv->order_hint,
1560 priv->frame_width, priv->frame_height, priv->upscaled_width,
1561 priv->render_width, priv->render_height,
1562 seq->color_config.subsampling_x + 1,
1563 seq->color_config.subsampling_y + 1, priv->bit_depth,
1564 priv->tile_rows, priv->tile_cols);
1565
1566 update_refs:
1567 for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
1568 if (current->refresh_frame_flags & (1 << i)) {
1569 priv->ref[i] = (AV1ReferenceFrameState) {
1570 .valid = 1,
1571 .frame_id = current->current_frame_id,
1572 .upscaled_width = priv->upscaled_width,
1573 .frame_width = priv->frame_width,
1574 .frame_height = priv->frame_height,
1575 .render_width = priv->render_width,
1576 .render_height = priv->render_height,
1577 .frame_type = current->frame_type,
1578 .subsampling_x = seq->color_config.subsampling_x,
1579 .subsampling_y = seq->color_config.subsampling_y,
1580 .bit_depth = priv->bit_depth,
1581 .order_hint = priv->order_hint,
1582 };
1583 }
1584 }
1585
1586 return 0;
1587 }
1588
FUNC(frame_header_obu)1589 static int FUNC(frame_header_obu)(CodedBitstreamContext *ctx, RWContext *rw,
1590 AV1RawFrameHeader *current, int redundant,
1591 AVBufferRef *rw_buffer_ref)
1592 {
1593 CodedBitstreamAV1Context *priv = ctx->priv_data;
1594 int start_pos, fh_bits, fh_bytes, err;
1595 uint8_t *fh_start;
1596
1597 if (priv->seen_frame_header) {
1598 if (!redundant) {
1599 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid repeated "
1600 "frame header OBU.\n");
1601 return AVERROR_INVALIDDATA;
1602 } else {
1603 GetBitContext fh;
1604 size_t i, b;
1605 uint32_t val;
1606
1607 HEADER("Redundant Frame Header");
1608
1609 av_assert0(priv->frame_header_ref && priv->frame_header);
1610
1611 init_get_bits(&fh, priv->frame_header,
1612 priv->frame_header_size);
1613 for (i = 0; i < priv->frame_header_size; i += 8) {
1614 b = FFMIN(priv->frame_header_size - i, 8);
1615 val = get_bits(&fh, b);
1616 xf(b, frame_header_copy[i],
1617 val, val, val, 1, i / 8);
1618 }
1619 }
1620 } else {
1621 if (redundant)
1622 HEADER("Redundant Frame Header (used as Frame Header)");
1623 else
1624 HEADER("Frame Header");
1625
1626 #ifdef READ
1627 start_pos = get_bits_count(rw);
1628 #else
1629 start_pos = put_bits_count(rw);
1630 #endif
1631
1632 CHECK(FUNC(uncompressed_header)(ctx, rw, current));
1633
1634 if (current->show_existing_frame) {
1635 priv->seen_frame_header = 0;
1636 } else {
1637 priv->seen_frame_header = 1;
1638
1639 av_buffer_unref(&priv->frame_header_ref);
1640
1641 #ifdef READ
1642 fh_bits = get_bits_count(rw) - start_pos;
1643 fh_start = (uint8_t*)rw->buffer + start_pos / 8;
1644 #else
1645 // Need to flush the bitwriter so that we can copy its output,
1646 // but use a copy so we don't affect the caller's structure.
1647 {
1648 PutBitContext tmp = *rw;
1649 flush_put_bits(&tmp);
1650 }
1651
1652 fh_bits = put_bits_count(rw) - start_pos;
1653 fh_start = rw->buf + start_pos / 8;
1654 #endif
1655 fh_bytes = (fh_bits + 7) / 8;
1656
1657 priv->frame_header_size = fh_bits;
1658
1659 if (rw_buffer_ref) {
1660 priv->frame_header_ref = av_buffer_ref(rw_buffer_ref);
1661 if (!priv->frame_header_ref)
1662 return AVERROR(ENOMEM);
1663 priv->frame_header = fh_start;
1664 } else {
1665 priv->frame_header_ref =
1666 av_buffer_alloc(fh_bytes + AV_INPUT_BUFFER_PADDING_SIZE);
1667 if (!priv->frame_header_ref)
1668 return AVERROR(ENOMEM);
1669 priv->frame_header = priv->frame_header_ref->data;
1670 memcpy(priv->frame_header, fh_start, fh_bytes);
1671 }
1672 }
1673 }
1674
1675 return 0;
1676 }
1677
FUNC(tile_group_obu)1678 static int FUNC(tile_group_obu)(CodedBitstreamContext *ctx, RWContext *rw,
1679 AV1RawTileGroup *current)
1680 {
1681 CodedBitstreamAV1Context *priv = ctx->priv_data;
1682 int num_tiles, tile_bits;
1683 int err;
1684
1685 HEADER("Tile Group");
1686
1687 num_tiles = priv->tile_cols * priv->tile_rows;
1688 if (num_tiles > 1)
1689 flag(tile_start_and_end_present_flag);
1690 else
1691 infer(tile_start_and_end_present_flag, 0);
1692
1693 if (num_tiles == 1 || !current->tile_start_and_end_present_flag) {
1694 infer(tg_start, 0);
1695 infer(tg_end, num_tiles - 1);
1696 } else {
1697 tile_bits = cbs_av1_tile_log2(1, priv->tile_cols) +
1698 cbs_av1_tile_log2(1, priv->tile_rows);
1699 fb(tile_bits, tg_start);
1700 fb(tile_bits, tg_end);
1701 }
1702
1703 CHECK(FUNC(byte_alignment)(ctx, rw));
1704
1705 // Reset header for next frame.
1706 if (current->tg_end == num_tiles - 1)
1707 priv->seen_frame_header = 0;
1708
1709 // Tile data follows.
1710
1711 return 0;
1712 }
1713
FUNC(frame_obu)1714 static int FUNC(frame_obu)(CodedBitstreamContext *ctx, RWContext *rw,
1715 AV1RawFrame *current,
1716 AVBufferRef *rw_buffer_ref)
1717 {
1718 int err;
1719
1720 CHECK(FUNC(frame_header_obu)(ctx, rw, ¤t->header,
1721 0, rw_buffer_ref));
1722
1723 CHECK(FUNC(byte_alignment)(ctx, rw));
1724
1725 CHECK(FUNC(tile_group_obu)(ctx, rw, ¤t->tile_group));
1726
1727 return 0;
1728 }
1729
FUNC(tile_list_obu)1730 static int FUNC(tile_list_obu)(CodedBitstreamContext *ctx, RWContext *rw,
1731 AV1RawTileList *current)
1732 {
1733 int err;
1734
1735 fb(8, output_frame_width_in_tiles_minus_1);
1736 fb(8, output_frame_height_in_tiles_minus_1);
1737
1738 fb(16, tile_count_minus_1);
1739
1740 // Tile data follows.
1741
1742 return 0;
1743 }
1744
FUNC(metadata_hdr_cll)1745 static int FUNC(metadata_hdr_cll)(CodedBitstreamContext *ctx, RWContext *rw,
1746 AV1RawMetadataHDRCLL *current)
1747 {
1748 int err;
1749
1750 fb(16, max_cll);
1751 fb(16, max_fall);
1752
1753 return 0;
1754 }
1755
FUNC(metadata_hdr_mdcv)1756 static int FUNC(metadata_hdr_mdcv)(CodedBitstreamContext *ctx, RWContext *rw,
1757 AV1RawMetadataHDRMDCV *current)
1758 {
1759 int err, i;
1760
1761 for (i = 0; i < 3; i++) {
1762 fbs(16, primary_chromaticity_x[i], 1, i);
1763 fbs(16, primary_chromaticity_y[i], 1, i);
1764 }
1765
1766 fb(16, white_point_chromaticity_x);
1767 fb(16, white_point_chromaticity_y);
1768
1769 fc(32, luminance_max, 1, MAX_UINT_BITS(32));
1770 // luminance_min must be lower than luminance_max. Convert luminance_max from
1771 // 24.8 fixed point to 18.14 fixed point in order to compare them.
1772 fc(32, luminance_min, 0, FFMIN(((uint64_t)current->luminance_max << 6) - 1,
1773 MAX_UINT_BITS(32)));
1774
1775 return 0;
1776 }
1777
FUNC(scalability_structure)1778 static int FUNC(scalability_structure)(CodedBitstreamContext *ctx, RWContext *rw,
1779 AV1RawMetadataScalability *current)
1780 {
1781 CodedBitstreamAV1Context *priv = ctx->priv_data;
1782 const AV1RawSequenceHeader *seq;
1783 int err, i, j;
1784
1785 if (!priv->sequence_header) {
1786 av_log(ctx->log_ctx, AV_LOG_ERROR, "No sequence header available: "
1787 "unable to parse scalability metadata.\n");
1788 return AVERROR_INVALIDDATA;
1789 }
1790 seq = priv->sequence_header;
1791
1792 fb(2, spatial_layers_cnt_minus_1);
1793 flag(spatial_layer_dimensions_present_flag);
1794 flag(spatial_layer_description_present_flag);
1795 flag(temporal_group_description_present_flag);
1796 fc(3, scalability_structure_reserved_3bits, 0, 0);
1797 if (current->spatial_layer_dimensions_present_flag) {
1798 for (i = 0; i <= current->spatial_layers_cnt_minus_1; i++) {
1799 fcs(16, spatial_layer_max_width[i],
1800 0, seq->max_frame_width_minus_1 + 1, 1, i);
1801 fcs(16, spatial_layer_max_height[i],
1802 0, seq->max_frame_height_minus_1 + 1, 1, i);
1803 }
1804 }
1805 if (current->spatial_layer_description_present_flag) {
1806 for (i = 0; i <= current->spatial_layers_cnt_minus_1; i++)
1807 fbs(8, spatial_layer_ref_id[i], 1, i);
1808 }
1809 if (current->temporal_group_description_present_flag) {
1810 fb(8, temporal_group_size);
1811 for (i = 0; i < current->temporal_group_size; i++) {
1812 fbs(3, temporal_group_temporal_id[i], 1, i);
1813 flags(temporal_group_temporal_switching_up_point_flag[i], 1, i);
1814 flags(temporal_group_spatial_switching_up_point_flag[i], 1, i);
1815 fbs(3, temporal_group_ref_cnt[i], 1, i);
1816 for (j = 0; j < current->temporal_group_ref_cnt[i]; j++) {
1817 fbs(8, temporal_group_ref_pic_diff[i][j], 2, i, j);
1818 }
1819 }
1820 }
1821
1822 return 0;
1823 }
1824
FUNC(metadata_scalability)1825 static int FUNC(metadata_scalability)(CodedBitstreamContext *ctx, RWContext *rw,
1826 AV1RawMetadataScalability *current)
1827 {
1828 int err;
1829
1830 fb(8, scalability_mode_idc);
1831
1832 if (current->scalability_mode_idc == AV1_SCALABILITY_SS)
1833 CHECK(FUNC(scalability_structure)(ctx, rw, current));
1834
1835 return 0;
1836 }
1837
FUNC(metadata_itut_t35)1838 static int FUNC(metadata_itut_t35)(CodedBitstreamContext *ctx, RWContext *rw,
1839 AV1RawMetadataITUTT35 *current)
1840 {
1841 int err;
1842 size_t i;
1843
1844 fb(8, itu_t_t35_country_code);
1845 if (current->itu_t_t35_country_code == 0xff)
1846 fb(8, itu_t_t35_country_code_extension_byte);
1847
1848 #ifdef READ
1849 // The payload runs up to the start of the trailing bits, but there might
1850 // be arbitrarily many trailing zeroes so we need to read through twice.
1851 current->payload_size = cbs_av1_get_payload_bytes_left(rw);
1852
1853 current->payload_ref = av_buffer_alloc(current->payload_size);
1854 if (!current->payload_ref)
1855 return AVERROR(ENOMEM);
1856 current->payload = current->payload_ref->data;
1857 #endif
1858
1859 for (i = 0; i < current->payload_size; i++)
1860 xf(8, itu_t_t35_payload_bytes[i], current->payload[i],
1861 0x00, 0xff, 1, i);
1862
1863 return 0;
1864 }
1865
FUNC(metadata_timecode)1866 static int FUNC(metadata_timecode)(CodedBitstreamContext *ctx, RWContext *rw,
1867 AV1RawMetadataTimecode *current)
1868 {
1869 int err;
1870
1871 fb(5, counting_type);
1872 flag(full_timestamp_flag);
1873 flag(discontinuity_flag);
1874 flag(cnt_dropped_flag);
1875 fb(9, n_frames);
1876
1877 if (current->full_timestamp_flag) {
1878 fc(6, seconds_value, 0, 59);
1879 fc(6, minutes_value, 0, 59);
1880 fc(5, hours_value, 0, 23);
1881 } else {
1882 flag(seconds_flag);
1883 if (current->seconds_flag) {
1884 fc(6, seconds_value, 0, 59);
1885 flag(minutes_flag);
1886 if (current->minutes_flag) {
1887 fc(6, minutes_value, 0, 59);
1888 flag(hours_flag);
1889 if (current->hours_flag)
1890 fc(5, hours_value, 0, 23);
1891 }
1892 }
1893 }
1894
1895 fb(5, time_offset_length);
1896 if (current->time_offset_length > 0)
1897 fb(current->time_offset_length, time_offset_value);
1898 else
1899 infer(time_offset_length, 0);
1900
1901 return 0;
1902 }
1903
FUNC(metadata_obu)1904 static int FUNC(metadata_obu)(CodedBitstreamContext *ctx, RWContext *rw,
1905 AV1RawMetadata *current)
1906 {
1907 int err;
1908
1909 leb128(metadata_type);
1910
1911 switch (current->metadata_type) {
1912 case AV1_METADATA_TYPE_HDR_CLL:
1913 CHECK(FUNC(metadata_hdr_cll)(ctx, rw, ¤t->metadata.hdr_cll));
1914 break;
1915 case AV1_METADATA_TYPE_HDR_MDCV:
1916 CHECK(FUNC(metadata_hdr_mdcv)(ctx, rw, ¤t->metadata.hdr_mdcv));
1917 break;
1918 case AV1_METADATA_TYPE_SCALABILITY:
1919 CHECK(FUNC(metadata_scalability)(ctx, rw, ¤t->metadata.scalability));
1920 break;
1921 case AV1_METADATA_TYPE_ITUT_T35:
1922 CHECK(FUNC(metadata_itut_t35)(ctx, rw, ¤t->metadata.itut_t35));
1923 break;
1924 case AV1_METADATA_TYPE_TIMECODE:
1925 CHECK(FUNC(metadata_timecode)(ctx, rw, ¤t->metadata.timecode));
1926 break;
1927 default:
1928 // Unknown metadata type.
1929 return AVERROR_PATCHWELCOME;
1930 }
1931
1932 return 0;
1933 }
1934
FUNC(padding_obu)1935 static int FUNC(padding_obu)(CodedBitstreamContext *ctx, RWContext *rw,
1936 AV1RawPadding *current)
1937 {
1938 int i, err;
1939
1940 HEADER("Padding");
1941
1942 #ifdef READ
1943 // The payload runs up to the start of the trailing bits, but there might
1944 // be arbitrarily many trailing zeroes so we need to read through twice.
1945 current->payload_size = cbs_av1_get_payload_bytes_left(rw);
1946
1947 current->payload_ref = av_buffer_alloc(current->payload_size);
1948 if (!current->payload_ref)
1949 return AVERROR(ENOMEM);
1950 current->payload = current->payload_ref->data;
1951 #endif
1952
1953 for (i = 0; i < current->payload_size; i++)
1954 xf(8, obu_padding_byte[i], current->payload[i], 0x00, 0xff, 1, i);
1955
1956 return 0;
1957 }
1958