2 * This file is part of FFmpeg.
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.
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.
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
19 static int FUNC(obu_header)(CodedBitstreamContext *ctx, RWContext *rw,
20 AV1RawOBUHeader *current)
23 av_unused int zero = 0;
27 fc(1, obu_forbidden_bit, 0, 0);
29 fc(4, obu_type, 0, AV1_OBU_PADDING);
30 flag(obu_extension_flag);
31 flag(obu_has_size_field);
33 fc(1, obu_reserved_1bit, 0, 0);
35 if (current->obu_extension_flag) {
38 fc(3, extension_header_reserved_3bits, 0, 0);
44 static int FUNC(trailing_bits)(CodedBitstreamContext *ctx, RWContext *rw, int nb_bits)
48 av_assert0(nb_bits > 0);
50 fixed(1, trailing_one_bit, 1);
54 fixed(1, trailing_zero_bit, 0);
61 static int FUNC(byte_alignment)(CodedBitstreamContext *ctx, RWContext *rw)
65 while (byte_alignment(rw) != 0)
66 fixed(1, zero_bit, 0);
71 static int FUNC(color_config)(CodedBitstreamContext *ctx, RWContext *rw,
72 AV1RawColorConfig *current, int seq_profile)
74 CodedBitstreamAV1Context *priv = ctx->priv_data;
79 if (seq_profile == FF_PROFILE_AV1_PROFESSIONAL &&
80 current->high_bitdepth) {
82 priv->bit_depth = current->twelve_bit ? 12 : 10;
84 priv->bit_depth = current->high_bitdepth ? 10 : 8;
87 if (seq_profile == FF_PROFILE_AV1_HIGH)
88 infer(mono_chrome, 0);
91 priv->num_planes = current->mono_chrome ? 1 : 3;
93 flag(color_description_present_flag);
94 if (current->color_description_present_flag) {
95 fb(8, color_primaries);
96 fb(8, transfer_characteristics);
97 fb(8, matrix_coefficients);
99 infer(color_primaries, AVCOL_PRI_UNSPECIFIED);
100 infer(transfer_characteristics, AVCOL_TRC_UNSPECIFIED);
101 infer(matrix_coefficients, AVCOL_SPC_UNSPECIFIED);
104 if (current->mono_chrome) {
107 infer(subsampling_x, 1);
108 infer(subsampling_y, 1);
109 infer(chroma_sample_position, AV1_CSP_UNKNOWN);
110 infer(separate_uv_delta_q, 0);
112 } else if (current->color_primaries == AVCOL_PRI_BT709 &&
113 current->transfer_characteristics == AVCOL_TRC_IEC61966_2_1 &&
114 current->matrix_coefficients == AVCOL_SPC_RGB) {
115 infer(color_range, 1);
116 infer(subsampling_x, 0);
117 infer(subsampling_y, 0);
118 flag(separate_uv_delta_q);
123 if (seq_profile == FF_PROFILE_AV1_MAIN) {
124 infer(subsampling_x, 1);
125 infer(subsampling_y, 1);
126 } else if (seq_profile == FF_PROFILE_AV1_HIGH) {
127 infer(subsampling_x, 0);
128 infer(subsampling_y, 0);
130 if (priv->bit_depth == 12) {
131 fb(1, subsampling_x);
132 if (current->subsampling_x)
133 fb(1, subsampling_y);
135 infer(subsampling_y, 0);
137 infer(subsampling_x, 1);
138 infer(subsampling_y, 0);
141 if (current->subsampling_x && current->subsampling_y) {
142 fc(2, chroma_sample_position, AV1_CSP_UNKNOWN,
146 flag(separate_uv_delta_q);
152 static int FUNC(timing_info)(CodedBitstreamContext *ctx, RWContext *rw,
153 AV1RawTimingInfo *current)
157 fc(32, num_units_in_display_tick, 1, MAX_UINT_BITS(32));
158 fc(32, time_scale, 1, MAX_UINT_BITS(32));
160 flag(equal_picture_interval);
161 if (current->equal_picture_interval)
162 uvlc(num_ticks_per_picture_minus_1, 0, MAX_UINT_BITS(32) - 1);
167 static int FUNC(decoder_model_info)(CodedBitstreamContext *ctx, RWContext *rw,
168 AV1RawDecoderModelInfo *current)
172 fb(5, buffer_delay_length_minus_1);
173 fb(32, num_units_in_decoding_tick);
174 fb(5, buffer_removal_time_length_minus_1);
175 fb(5, frame_presentation_time_length_minus_1);
180 static int FUNC(sequence_header_obu)(CodedBitstreamContext *ctx, RWContext *rw,
181 AV1RawSequenceHeader *current)
185 HEADER("Sequence Header");
187 fc(3, seq_profile, FF_PROFILE_AV1_MAIN,
188 FF_PROFILE_AV1_PROFESSIONAL);
190 flag(reduced_still_picture_header);
192 if (current->reduced_still_picture_header) {
193 infer(timing_info_present_flag, 0);
194 infer(decoder_model_info_present_flag, 0);
195 infer(initial_display_delay_present_flag, 0);
196 infer(operating_points_cnt_minus_1, 0);
197 infer(operating_point_idc[0], 0);
199 fb(5, seq_level_idx[0]);
201 infer(seq_tier[0], 0);
202 infer(decoder_model_present_for_this_op[0], 0);
203 infer(initial_display_delay_present_for_this_op[0], 0);
206 flag(timing_info_present_flag);
207 if (current->timing_info_present_flag) {
208 CHECK(FUNC(timing_info)(ctx, rw, ¤t->timing_info));
210 flag(decoder_model_info_present_flag);
211 if (current->decoder_model_info_present_flag) {
212 CHECK(FUNC(decoder_model_info)
213 (ctx, rw, ¤t->decoder_model_info));
216 infer(decoder_model_info_present_flag, 0);
219 flag(initial_display_delay_present_flag);
221 fb(5, operating_points_cnt_minus_1);
222 for (i = 0; i <= current->operating_points_cnt_minus_1; i++) {
223 fbs(12, operating_point_idc[i], 1, i);
224 fbs(5, seq_level_idx[i], 1, i);
226 if (current->seq_level_idx[i] > 7)
227 flags(seq_tier[i], 1, i);
229 infer(seq_tier[i], 0);
231 if (current->decoder_model_info_present_flag) {
232 flags(decoder_model_present_for_this_op[i], 1, i);
233 if (current->decoder_model_present_for_this_op[i]) {
234 int n = current->decoder_model_info.buffer_delay_length_minus_1 + 1;
235 fbs(n, decoder_buffer_delay[i], 1, i);
236 fbs(n, encoder_buffer_delay[i], 1, i);
237 flags(low_delay_mode_flag[i], 1, i);
240 infer(decoder_model_present_for_this_op[i], 0);
243 if (current->initial_display_delay_present_flag) {
244 flags(initial_display_delay_present_for_this_op[i], 1, i);
245 if (current->initial_display_delay_present_for_this_op[i])
246 fbs(4, initial_display_delay_minus_1[i], 1, i);
251 fb(4, frame_width_bits_minus_1);
252 fb(4, frame_height_bits_minus_1);
254 fb(current->frame_width_bits_minus_1 + 1, max_frame_width_minus_1);
255 fb(current->frame_height_bits_minus_1 + 1, max_frame_height_minus_1);
257 if (current->reduced_still_picture_header)
258 infer(frame_id_numbers_present_flag, 0);
260 flag(frame_id_numbers_present_flag);
261 if (current->frame_id_numbers_present_flag) {
262 fb(4, delta_frame_id_length_minus_2);
263 fb(3, additional_frame_id_length_minus_1);
266 flag(use_128x128_superblock);
267 flag(enable_filter_intra);
268 flag(enable_intra_edge_filter);
270 if (current->reduced_still_picture_header) {
271 infer(enable_intraintra_compound, 0);
272 infer(enable_masked_compound, 0);
273 infer(enable_warped_motion, 0);
274 infer(enable_dual_filter, 0);
275 infer(enable_order_hint, 0);
276 infer(enable_jnt_comp, 0);
277 infer(enable_ref_frame_mvs, 0);
279 infer(seq_force_screen_content_tools,
280 AV1_SELECT_SCREEN_CONTENT_TOOLS);
281 infer(seq_force_integer_mv,
282 AV1_SELECT_INTEGER_MV);
284 flag(enable_intraintra_compound);
285 flag(enable_masked_compound);
286 flag(enable_warped_motion);
287 flag(enable_dual_filter);
289 flag(enable_order_hint);
290 if (current->enable_order_hint) {
291 flag(enable_jnt_comp);
292 flag(enable_ref_frame_mvs);
294 infer(enable_jnt_comp, 0);
295 infer(enable_ref_frame_mvs, 0);
298 flag(seq_choose_screen_content_tools);
299 if (current->seq_choose_screen_content_tools)
300 infer(seq_force_screen_content_tools,
301 AV1_SELECT_SCREEN_CONTENT_TOOLS);
303 fb(1, seq_force_screen_content_tools);
304 if (current->seq_force_screen_content_tools > 0) {
305 flag(seq_choose_integer_mv);
306 if (current->seq_choose_integer_mv)
307 infer(seq_force_integer_mv,
308 AV1_SELECT_INTEGER_MV);
310 fb(1, seq_force_integer_mv);
312 infer(seq_force_integer_mv, AV1_SELECT_INTEGER_MV);
315 if (current->enable_order_hint)
316 fb(3, order_hint_bits_minus_1);
319 flag(enable_superres);
321 flag(enable_restoration);
323 CHECK(FUNC(color_config)(ctx, rw, ¤t->color_config,
324 current->seq_profile));
326 flag(film_grain_params_present);
331 static int FUNC(temporal_delimiter_obu)(CodedBitstreamContext *ctx, RWContext *rw)
333 CodedBitstreamAV1Context *priv = ctx->priv_data;
335 HEADER("Temporal Delimiter");
337 priv->seen_frame_header = 0;
342 static int FUNC(superres_params)(CodedBitstreamContext *ctx, RWContext *rw,
343 AV1RawFrameHeader *current)
345 CodedBitstreamAV1Context *priv = ctx->priv_data;
346 const AV1RawSequenceHeader *seq = priv->sequence_header;
349 if (seq->enable_superres)
352 infer(use_superres, 0);
354 if (current->use_superres) {
356 denom = current->coded_denom + AV1_SUPERRES_DENOM_MIN;
358 denom = AV1_SUPERRES_NUM;
361 priv->upscaled_width = priv->frame_width;
362 priv->frame_width = (priv->upscaled_width * AV1_SUPERRES_NUM +
368 static int FUNC(frame_size)(CodedBitstreamContext *ctx, RWContext *rw,
369 AV1RawFrameHeader *current)
371 CodedBitstreamAV1Context *priv = ctx->priv_data;
372 const AV1RawSequenceHeader *seq = priv->sequence_header;
375 if (current->frame_size_override_flag) {
376 fb(seq->frame_width_bits_minus_1 + 1, frame_width_minus_1);
377 fb(seq->frame_height_bits_minus_1 + 1, frame_height_minus_1);
379 priv->frame_width = current->frame_width_minus_1 + 1;
380 priv->frame_height = current->frame_height_minus_1 + 1;
382 priv->frame_width = seq->max_frame_width_minus_1 + 1;
383 priv->frame_height = seq->max_frame_height_minus_1 + 1;
386 CHECK(FUNC(superres_params)(ctx, rw, current));
391 static int FUNC(render_size)(CodedBitstreamContext *ctx, RWContext *rw,
392 AV1RawFrameHeader *current)
394 CodedBitstreamAV1Context *priv = ctx->priv_data;
397 flag(render_and_frame_size_different);
399 if (current->render_and_frame_size_different) {
400 fb(16, render_width_minus_1);
401 fb(16, render_height_minus_1);
403 priv->render_width = current->render_width_minus_1 + 1;
404 priv->render_height = current->render_height_minus_1 + 1;
406 priv->render_width = priv->upscaled_width;
407 priv->render_height = priv->frame_height;
413 static int FUNC(frame_size_with_refs)(CodedBitstreamContext *ctx, RWContext *rw,
414 AV1RawFrameHeader *current)
416 CodedBitstreamAV1Context *priv = ctx->priv_data;
419 for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
420 flags(found_ref[i], 1, i);
421 if (current->found_ref[i]) {
422 AV1ReferenceFrameState *ref;
424 if (current->ref_frame_idx[i] < 0 ||
425 !priv->ref[current->ref_frame_idx[i]].valid) {
426 av_log(ctx->log_ctx, AV_LOG_ERROR,
427 "Missing reference frame needed for frame size "
428 "(ref = %d, ref_frame_idx = %d).\n",
429 i, current->ref_frame_idx[i]);
430 return AVERROR_INVALIDDATA;
432 ref = &priv->ref[current->ref_frame_idx[i]];
434 priv->upscaled_width = ref->upscaled_width;
435 priv->frame_width = ref->frame_width;
436 priv->frame_height = ref->frame_height;
437 priv->render_width = ref->render_width;
438 priv->render_height = ref->render_height;
443 if (i >= AV1_REFS_PER_FRAME) {
444 CHECK(FUNC(frame_size)(ctx, rw, current));
445 CHECK(FUNC(render_size)(ctx, rw, current));
447 CHECK(FUNC(superres_params)(ctx, rw, current));
453 static int FUNC(interpolation_filter)(CodedBitstreamContext *ctx, RWContext *rw,
454 AV1RawFrameHeader *current)
458 flag(is_filter_switchable);
459 if (current->is_filter_switchable)
460 infer(interpolation_filter,
461 AV1_INTERPOLATION_FILTER_SWITCHABLE);
463 fb(2, interpolation_filter);
468 static int FUNC(tile_info)(CodedBitstreamContext *ctx, RWContext *rw,
469 AV1RawFrameHeader *current)
471 CodedBitstreamAV1Context *priv = ctx->priv_data;
472 const AV1RawSequenceHeader *seq = priv->sequence_header;
473 int mi_cols, mi_rows, sb_cols, sb_rows, sb_shift, sb_size;
474 int max_tile_width_sb, max_tile_height_sb, max_tile_area_sb;
475 int min_log2_tile_cols, max_log2_tile_cols, max_log2_tile_rows;
476 int min_log2_tiles, min_log2_tile_rows;
479 mi_cols = 2 * ((priv->frame_width + 7) >> 3);
480 mi_rows = 2 * ((priv->frame_height + 7) >> 3);
482 sb_cols = seq->use_128x128_superblock ? ((mi_cols + 31) >> 5)
483 : ((mi_cols + 15) >> 4);
484 sb_rows = seq->use_128x128_superblock ? ((mi_rows + 31) >> 5)
485 : ((mi_rows + 15) >> 4);
487 sb_shift = seq->use_128x128_superblock ? 5 : 4;
488 sb_size = sb_shift + 2;
490 max_tile_width_sb = AV1_MAX_TILE_WIDTH >> sb_size;
491 max_tile_area_sb = AV1_MAX_TILE_AREA >> (2 * sb_size);
493 min_log2_tile_cols = cbs_av1_tile_log2(max_tile_width_sb, sb_cols);
494 max_log2_tile_cols = cbs_av1_tile_log2(1, FFMIN(sb_cols, AV1_MAX_TILE_COLS));
495 max_log2_tile_rows = cbs_av1_tile_log2(1, FFMIN(sb_rows, AV1_MAX_TILE_ROWS));
496 min_log2_tiles = FFMAX(min_log2_tile_cols,
497 cbs_av1_tile_log2(max_tile_area_sb, sb_rows * sb_cols));
499 flag(uniform_tile_spacing_flag);
501 if (current->uniform_tile_spacing_flag) {
502 int tile_width_sb, tile_height_sb;
504 increment(tile_cols_log2, min_log2_tile_cols, max_log2_tile_cols);
506 tile_width_sb = (sb_cols + (1 << current->tile_cols_log2) - 1) >>
507 current->tile_cols_log2;
508 current->tile_cols = (sb_cols + tile_width_sb - 1) / tile_width_sb;
510 min_log2_tile_rows = FFMAX(min_log2_tiles - current->tile_cols_log2, 0);
512 increment(tile_rows_log2, min_log2_tile_rows, max_log2_tile_rows);
514 tile_height_sb = (sb_rows + (1 << current->tile_rows_log2) - 1) >>
515 current->tile_rows_log2;
516 current->tile_rows = (sb_rows + tile_height_sb - 1) / tile_height_sb;
519 int widest_tile_sb, start_sb, size_sb, max_width, max_height;
524 for (i = 0; start_sb < sb_cols && i < AV1_MAX_TILE_COLS; i++) {
525 max_width = FFMIN(sb_cols - start_sb, max_tile_width_sb);
526 ns(max_width, width_in_sbs_minus_1[i], 1, i);
527 size_sb = current->width_in_sbs_minus_1[i] + 1;
528 widest_tile_sb = FFMAX(size_sb, widest_tile_sb);
531 current->tile_cols_log2 = cbs_av1_tile_log2(1, i);
532 current->tile_cols = i;
534 if (min_log2_tiles > 0)
535 max_tile_area_sb = (sb_rows * sb_cols) >> (min_log2_tiles + 1);
537 max_tile_area_sb = sb_rows * sb_cols;
538 max_tile_height_sb = FFMAX(max_tile_area_sb / widest_tile_sb, 1);
541 for (i = 0; start_sb < sb_rows && i < AV1_MAX_TILE_ROWS; i++) {
542 max_height = FFMIN(sb_rows - start_sb, max_tile_height_sb);
543 ns(max_height, height_in_sbs_minus_1[i], 1, i);
544 size_sb = current->height_in_sbs_minus_1[i] + 1;
547 current->tile_rows_log2 = cbs_av1_tile_log2(1, i);
548 current->tile_rows = i;
551 if (current->tile_cols_log2 > 0 ||
552 current->tile_rows_log2 > 0) {
553 fb(current->tile_cols_log2 + current->tile_rows_log2,
554 context_update_tile_id);
555 fb(2, tile_size_bytes_minus1);
557 infer(context_update_tile_id, 0);
560 priv->tile_cols = current->tile_cols;
561 priv->tile_rows = current->tile_rows;
566 static int FUNC(quantization_params)(CodedBitstreamContext *ctx, RWContext *rw,
567 AV1RawFrameHeader *current)
569 CodedBitstreamAV1Context *priv = ctx->priv_data;
570 const AV1RawSequenceHeader *seq = priv->sequence_header;
575 delta_q(delta_q_y_dc);
577 if (priv->num_planes > 1) {
578 if (seq->color_config.separate_uv_delta_q)
581 infer(diff_uv_delta, 0);
583 delta_q(delta_q_u_dc);
584 delta_q(delta_q_u_ac);
586 if (current->diff_uv_delta) {
587 delta_q(delta_q_v_dc);
588 delta_q(delta_q_v_ac);
590 infer(delta_q_v_dc, current->delta_q_u_dc);
591 infer(delta_q_v_ac, current->delta_q_u_ac);
594 infer(delta_q_u_dc, 0);
595 infer(delta_q_u_ac, 0);
596 infer(delta_q_v_dc, 0);
597 infer(delta_q_v_ac, 0);
601 if (current->using_qmatrix) {
604 if (seq->color_config.separate_uv_delta_q)
607 infer(qm_v, current->qm_u);
613 static int FUNC(segmentation_params)(CodedBitstreamContext *ctx, RWContext *rw,
614 AV1RawFrameHeader *current)
616 static const uint8_t bits[AV1_SEG_LVL_MAX] = { 8, 6, 6, 6, 6, 3, 0, 0 };
617 static const uint8_t sign[AV1_SEG_LVL_MAX] = { 1, 1, 1, 1, 1, 0, 0, 0 };
620 flag(segmentation_enabled);
622 if (current->segmentation_enabled) {
623 if (current->primary_ref_frame == AV1_PRIMARY_REF_NONE) {
624 infer(segmentation_update_map, 1);
625 infer(segmentation_temporal_update, 0);
626 infer(segmentation_update_data, 1);
628 flag(segmentation_update_map);
629 if (current->segmentation_update_map)
630 flag(segmentation_temporal_update);
632 infer(segmentation_temporal_update, 0);
633 flag(segmentation_update_data);
636 if (current->segmentation_update_data) {
637 for (i = 0; i < AV1_MAX_SEGMENTS; i++) {
638 for (j = 0; j < AV1_SEG_LVL_MAX; j++) {
639 flags(feature_enabled[i][j], 2, i, j);
641 if (current->feature_enabled[i][j] && bits[j] > 0) {
643 sus(1 + bits[j], feature_value[i][j], 2, i, j);
645 fbs(bits[j], feature_value[i][j], 2, i, j);
647 infer(feature_value[i][j], 0);
653 for (i = 0; i < AV1_MAX_SEGMENTS; i++) {
654 for (j = 0; j < AV1_SEG_LVL_MAX; j++) {
655 infer(feature_enabled[i][j], 0);
656 infer(feature_value[i][j], 0);
664 static int FUNC(delta_q_params)(CodedBitstreamContext *ctx, RWContext *rw,
665 AV1RawFrameHeader *current)
669 if (current->base_q_idx > 0)
670 flag(delta_q_present);
672 infer(delta_q_present, 0);
674 if (current->delta_q_present)
680 static int FUNC(delta_lf_params)(CodedBitstreamContext *ctx, RWContext *rw,
681 AV1RawFrameHeader *current)
685 if (current->delta_q_present) {
686 if (!current->allow_intrabc)
687 flag(delta_lf_present);
689 infer(delta_lf_present, 0);
690 if (current->delta_lf_present) {
692 flag(delta_lf_multi);
694 infer(delta_lf_res, 0);
695 infer(delta_lf_multi, 0);
698 infer(delta_lf_present, 0);
699 infer(delta_lf_res, 0);
700 infer(delta_lf_multi, 0);
706 static int FUNC(loop_filter_params)(CodedBitstreamContext *ctx, RWContext *rw,
707 AV1RawFrameHeader *current)
709 CodedBitstreamAV1Context *priv = ctx->priv_data;
712 if (priv->coded_lossless || current->allow_intrabc) {
713 infer(loop_filter_level[0], 0);
714 infer(loop_filter_level[1], 0);
715 infer(loop_filter_ref_deltas[AV1_REF_FRAME_INTRA], 1);
716 infer(loop_filter_ref_deltas[AV1_REF_FRAME_LAST], 0);
717 infer(loop_filter_ref_deltas[AV1_REF_FRAME_LAST2], 0);
718 infer(loop_filter_ref_deltas[AV1_REF_FRAME_LAST3], 0);
719 infer(loop_filter_ref_deltas[AV1_REF_FRAME_BWDREF], 0);
720 infer(loop_filter_ref_deltas[AV1_REF_FRAME_GOLDEN], -1);
721 infer(loop_filter_ref_deltas[AV1_REF_FRAME_ALTREF], -1);
722 infer(loop_filter_ref_deltas[AV1_REF_FRAME_ALTREF2], -1);
723 for (i = 0; i < 2; i++)
724 infer(loop_filter_mode_deltas[i], 0);
728 fb(6, loop_filter_level[0]);
729 fb(6, loop_filter_level[1]);
731 if (priv->num_planes > 1) {
732 if (current->loop_filter_level[0] ||
733 current->loop_filter_level[1]) {
734 fb(6, loop_filter_level[2]);
735 fb(6, loop_filter_level[3]);
739 fb(3, loop_filter_sharpness);
741 flag(loop_filter_delta_enabled);
742 if (current->loop_filter_delta_enabled) {
743 flag(loop_filter_delta_update);
744 if (current->loop_filter_delta_update) {
745 for (i = 0; i < AV1_TOTAL_REFS_PER_FRAME; i++) {
746 flags(update_ref_delta[i], 1, i);
747 if (current->update_ref_delta[i])
748 sus(1 + 6, loop_filter_ref_deltas[i], 1, i);
750 for (i = 0; i < 2; i++) {
751 flags(update_mode_delta[i], 1, i);
752 if (current->update_mode_delta[i])
753 sus(1 + 6, loop_filter_mode_deltas[i], 1, i);
761 static int FUNC(cdef_params)(CodedBitstreamContext *ctx, RWContext *rw,
762 AV1RawFrameHeader *current)
764 CodedBitstreamAV1Context *priv = ctx->priv_data;
765 const AV1RawSequenceHeader *seq = priv->sequence_header;
768 if (priv->coded_lossless || current->allow_intrabc ||
770 infer(cdef_damping_minus_3, 0);
772 infer(cdef_y_pri_strength[0], 0);
773 infer(cdef_y_sec_strength[0], 0);
774 infer(cdef_uv_pri_strength[0], 0);
775 infer(cdef_uv_sec_strength[0], 0);
780 fb(2, cdef_damping_minus_3);
783 for (i = 0; i < (1 << current->cdef_bits); i++) {
784 fbs(4, cdef_y_pri_strength[i], 1, i);
785 fbs(2, cdef_y_sec_strength[i], 1, i);
787 if (priv->num_planes > 1) {
788 fbs(4, cdef_uv_pri_strength[i], 1, i);
789 fbs(2, cdef_uv_sec_strength[i], 1, i);
796 static int FUNC(lr_params)(CodedBitstreamContext *ctx, RWContext *rw,
797 AV1RawFrameHeader *current)
799 CodedBitstreamAV1Context *priv = ctx->priv_data;
800 const AV1RawSequenceHeader *seq = priv->sequence_header;
801 int uses_lr, uses_chroma_lr;
804 if (priv->all_lossless || current->allow_intrabc ||
805 !seq->enable_restoration) {
809 uses_lr = uses_chroma_lr = 0;
810 for (i = 0; i < priv->num_planes; i++) {
811 fbs(2, lr_type[i], 1, i);
813 if (current->lr_type[i] != 0) {
821 if (seq->use_128x128_superblock)
822 increment(lr_unit_shift, 1, 2);
824 increment(lr_unit_shift, 0, 2);
826 if(seq->color_config.subsampling_x &&
827 seq->color_config.subsampling_y && uses_chroma_lr) {
830 infer(lr_uv_shift, 0);
837 static int FUNC(read_tx_mode)(CodedBitstreamContext *ctx, RWContext *rw,
838 AV1RawFrameHeader *current)
840 CodedBitstreamAV1Context *priv = ctx->priv_data;
843 if (priv->coded_lossless)
846 increment(tx_mode, 1, 2);
851 static int FUNC(frame_reference_mode)(CodedBitstreamContext *ctx, RWContext *rw,
852 AV1RawFrameHeader *current)
856 if (current->frame_type == AV1_FRAME_INTRA_ONLY ||
857 current->frame_type == AV1_FRAME_KEY)
858 infer(reference_select, 0);
860 flag(reference_select);
865 static int FUNC(skip_mode_params)(CodedBitstreamContext *ctx, RWContext *rw,
866 AV1RawFrameHeader *current)
868 CodedBitstreamAV1Context *priv = ctx->priv_data;
869 const AV1RawSequenceHeader *seq = priv->sequence_header;
870 int skip_mode_allowed;
873 if (current->frame_type == AV1_FRAME_KEY ||
874 current->frame_type == AV1_FRAME_INTRA_ONLY ||
875 !current->reference_select || !seq->enable_order_hint) {
876 skip_mode_allowed = 0;
878 int forward_idx, backward_idx;
879 int forward_hint, backward_hint;
880 int ref_hint, dist, i;
884 for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
885 ref_hint = priv->ref[i].order_hint;
886 dist = cbs_av1_get_relative_dist(seq, ref_hint,
887 current->order_hint);
889 if (forward_idx < 0 ||
890 cbs_av1_get_relative_dist(seq, ref_hint,
893 forward_hint = ref_hint;
895 } else if (dist > 0) {
896 if (backward_idx < 0 ||
897 cbs_av1_get_relative_dist(seq, ref_hint,
898 backward_hint) < 0) {
900 backward_hint = ref_hint;
905 if (forward_idx < 0) {
906 skip_mode_allowed = 0;
907 } else if (backward_idx >= 0) {
908 skip_mode_allowed = 1;
909 // Frames for skip mode are forward_idx and backward_idx.
911 int second_forward_idx;
912 int second_forward_hint;
914 second_forward_idx = -1;
915 for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
916 ref_hint = priv->ref[i].order_hint;
917 if (cbs_av1_get_relative_dist(seq, ref_hint,
919 if (second_forward_idx < 0 ||
920 cbs_av1_get_relative_dist(seq, ref_hint,
921 second_forward_hint) > 0) {
922 second_forward_idx = i;
923 second_forward_hint = ref_hint;
928 if (second_forward_idx < 0) {
929 skip_mode_allowed = 0;
931 skip_mode_allowed = 1;
932 // Frames for skip mode are forward_idx and second_forward_idx.
937 if (skip_mode_allowed)
938 flag(skip_mode_present);
940 infer(skip_mode_present, 0);
945 static int FUNC(global_motion_param)(CodedBitstreamContext *ctx, RWContext *rw,
946 AV1RawFrameHeader *current,
947 int type, int ref, int idx)
949 uint32_t abs_bits, prec_bits, num_syms;
953 if (type == AV1_WARP_MODEL_TRANSLATION) {
954 abs_bits = AV1_GM_ABS_TRANS_ONLY_BITS - !current->allow_high_precision_mv;
955 prec_bits = AV1_GM_TRANS_ONLY_PREC_BITS - !current->allow_high_precision_mv;
957 abs_bits = AV1_GM_ABS_TRANS_BITS;
958 prec_bits = AV1_GM_TRANS_PREC_BITS;
961 abs_bits = AV1_GM_ABS_ALPHA_BITS;
962 prec_bits = AV1_GM_ALPHA_PREC_BITS;
965 num_syms = 2 * (1 << abs_bits) + 1;
966 subexp(gm_params[ref][idx], num_syms, 2, ref, idx);
968 // Actual gm_params value is not reconstructed here.
974 static int FUNC(global_motion_params)(CodedBitstreamContext *ctx, RWContext *rw,
975 AV1RawFrameHeader *current)
980 if (current->frame_type == AV1_FRAME_KEY ||
981 current->frame_type == AV1_FRAME_INTRA_ONLY)
984 for (ref = AV1_REF_FRAME_LAST; ref <= AV1_REF_FRAME_ALTREF; ref++) {
985 flags(is_global[ref], 1, ref);
986 if (current->is_global[ref]) {
987 flags(is_rot_zoom[ref], 1, ref);
988 if (current->is_rot_zoom[ref]) {
989 type = AV1_WARP_MODEL_ROTZOOM;
991 flags(is_translation[ref], 1, ref);
992 type = current->is_translation[ref] ? AV1_WARP_MODEL_TRANSLATION
993 : AV1_WARP_MODEL_AFFINE;
996 type = AV1_WARP_MODEL_IDENTITY;
999 if (type >= AV1_WARP_MODEL_ROTZOOM) {
1000 CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 2));
1001 CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 3));
1002 if (type == AV1_WARP_MODEL_AFFINE) {
1003 CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 4));
1004 CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 5));
1006 // gm_params[ref][4] = -gm_params[ref][3]
1007 // gm_params[ref][5] = gm_params[ref][2]
1010 if (type >= AV1_WARP_MODEL_TRANSLATION) {
1011 CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 0));
1012 CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 1));
1019 static int FUNC(film_grain_params)(CodedBitstreamContext *ctx, RWContext *rw,
1020 AV1RawFrameHeader *current)
1022 CodedBitstreamAV1Context *priv = ctx->priv_data;
1023 const AV1RawSequenceHeader *seq = priv->sequence_header;
1024 int num_pos_luma, num_pos_chroma;
1027 if (!seq->film_grain_params_present ||
1028 (!current->show_frame && !current->showable_frame))
1033 if (!current->apply_grain)
1038 if (current->frame_type == AV1_FRAME_INTER)
1041 infer(update_grain, 1);
1043 if (!current->update_grain) {
1044 fb(3, film_grain_params_ref_idx);
1048 fb(4, num_y_points);
1049 for (i = 0; i < current->num_y_points; i++) {
1050 fbs(8, point_y_value[i], 1, i);
1051 fbs(8, point_y_scaling[i], 1, i);
1054 if (seq->color_config.mono_chrome)
1055 infer(chroma_scaling_from_luma, 0);
1057 flag(chroma_scaling_from_luma);
1059 if (seq->color_config.mono_chrome ||
1060 current->chroma_scaling_from_luma ||
1061 (seq->color_config.subsampling_x == 1 &&
1062 seq->color_config.subsampling_y == 1 &&
1063 current->num_y_points == 0)) {
1064 infer(num_cb_points, 0);
1065 infer(num_cr_points, 0);
1067 fb(4, num_cb_points);
1068 for (i = 0; i < current->num_cb_points; i++) {
1069 fbs(8, point_cb_value[i], 1, i);
1070 fbs(8, point_cb_scaling[i], 1, i);
1072 fb(4, num_cr_points);
1073 for (i = 0; i < current->num_cr_points; i++) {
1074 fbs(8, point_cr_value[i], 1, i);
1075 fbs(8, point_cr_scaling[i], 1, i);
1079 fb(2, grain_scaling_minus_8);
1080 fb(2, ar_coeff_lag);
1081 num_pos_luma = 2 * current->ar_coeff_lag * (current->ar_coeff_lag + 1);
1082 if (current->num_y_points) {
1083 num_pos_chroma = num_pos_luma + 1;
1084 for (i = 0; i < num_pos_luma; i++)
1085 fbs(8, ar_coeffs_y_plus_128[i], 1, i);
1087 num_pos_chroma = num_pos_luma;
1089 if (current->chroma_scaling_from_luma || current->num_cb_points) {
1090 for (i = 0; i < num_pos_chroma; i++)
1091 fbs(8, ar_coeffs_cb_plus_128[i], 1, i);
1093 if (current->chroma_scaling_from_luma || current->num_cr_points) {
1094 for (i = 0; i < num_pos_chroma; i++)
1095 fbs(8, ar_coeffs_cr_plus_128[i], 1, i);
1097 fb(2, ar_coeff_shift_minus_6);
1098 fb(2, grain_scale_shift);
1099 if (current->num_cb_points) {
1101 fb(8, cb_luma_mult);
1104 if (current->num_cr_points) {
1106 fb(8, cr_luma_mult);
1111 flag(clip_to_restricted_range);
1116 static int FUNC(uncompressed_header)(CodedBitstreamContext *ctx, RWContext *rw,
1117 AV1RawFrameHeader *current)
1119 CodedBitstreamAV1Context *priv = ctx->priv_data;
1120 const AV1RawSequenceHeader *seq;
1121 int id_len, diff_len, all_frames, frame_is_intra, order_hint_bits;
1124 if (!priv->sequence_header) {
1125 av_log(ctx->log_ctx, AV_LOG_ERROR, "No sequence header available: "
1126 "unable to decode frame header.\n");
1127 return AVERROR_INVALIDDATA;
1129 seq = priv->sequence_header;
1131 id_len = seq->additional_frame_id_length_minus_1 +
1132 seq->delta_frame_id_length_minus_2 + 3;
1133 all_frames = (1 << AV1_NUM_REF_FRAMES) - 1;
1135 if (seq->reduced_still_picture_header) {
1136 infer(show_existing_frame, 0);
1137 infer(frame_type, AV1_FRAME_KEY);
1138 infer(show_frame, 1);
1139 infer(showable_frame, 0);
1143 flag(show_existing_frame);
1145 if (current->show_existing_frame) {
1146 AV1ReferenceFrameState *frame;
1148 fb(3, frame_to_show_map_idx);
1149 frame = &priv->ref[current->frame_to_show_map_idx];
1151 if (seq->decoder_model_info_present_flag &&
1152 !seq->timing_info.equal_picture_interval) {
1153 fb(seq->decoder_model_info.frame_presentation_time_length_minus_1 + 1,
1154 frame_presentation_time);
1157 if (seq->frame_id_numbers_present_flag)
1158 fb(id_len, display_frame_id);
1160 if (frame->frame_type == AV1_FRAME_KEY)
1161 infer(refresh_frame_flags, all_frames);
1163 infer(refresh_frame_flags, 0);
1169 frame_is_intra = (current->frame_type == AV1_FRAME_INTRA_ONLY ||
1170 current->frame_type == AV1_FRAME_KEY);
1173 if (current->show_frame &&
1174 seq->decoder_model_info_present_flag &&
1175 !seq->timing_info.equal_picture_interval) {
1176 fb(seq->decoder_model_info.frame_presentation_time_length_minus_1 + 1,
1177 frame_presentation_time);
1179 if (current->show_frame)
1180 infer(showable_frame, current->frame_type != AV1_FRAME_KEY);
1182 flag(showable_frame);
1184 if (current->frame_type == AV1_FRAME_SWITCH ||
1185 (current->frame_type == AV1_FRAME_KEY && current->show_frame))
1186 infer(error_resilient_mode, 1);
1188 flag(error_resilient_mode);
1191 if (current->frame_type == AV1_FRAME_KEY && current->show_frame) {
1192 for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
1193 priv->ref[i].valid = 0;
1194 priv->ref[i].order_hint = 0;
1198 flag(disable_cdf_update);
1200 if (seq->seq_force_screen_content_tools ==
1201 AV1_SELECT_SCREEN_CONTENT_TOOLS) {
1202 flag(allow_screen_content_tools);
1204 infer(allow_screen_content_tools,
1205 seq->seq_force_screen_content_tools);
1207 if (current->allow_screen_content_tools) {
1208 if (seq->seq_force_integer_mv == AV1_SELECT_INTEGER_MV)
1209 flag(force_integer_mv);
1211 infer(force_integer_mv, seq->seq_force_integer_mv);
1213 infer(force_integer_mv, 0);
1216 if (seq->frame_id_numbers_present_flag) {
1217 fb(id_len, current_frame_id);
1219 diff_len = seq->delta_frame_id_length_minus_2 + 2;
1220 for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
1221 if (current->current_frame_id > (1 << diff_len)) {
1222 if (priv->ref[i].frame_id > current->current_frame_id ||
1223 priv->ref[i].frame_id < (current->current_frame_id -
1225 priv->ref[i].valid = 0;
1227 if (priv->ref[i].frame_id > current->current_frame_id &&
1228 priv->ref[i].frame_id < ((1 << id_len) +
1229 current->current_frame_id -
1231 priv->ref[i].valid = 0;
1235 infer(current_frame_id, 0);
1238 if (current->frame_type == AV1_FRAME_SWITCH)
1239 infer(frame_size_override_flag, 1);
1240 else if(seq->reduced_still_picture_header)
1241 infer(frame_size_override_flag, 0);
1243 flag(frame_size_override_flag);
1246 seq->enable_order_hint ? seq->order_hint_bits_minus_1 + 1 : 0;
1247 if (order_hint_bits > 0)
1248 fb(order_hint_bits, order_hint);
1250 infer(order_hint, 0);
1252 if (frame_is_intra || current->error_resilient_mode)
1253 infer(primary_ref_frame, AV1_PRIMARY_REF_NONE);
1255 fb(3, primary_ref_frame);
1257 if (seq->decoder_model_info_present_flag) {
1258 flag(buffer_removal_time_present_flag);
1259 if (current->buffer_removal_time_present_flag) {
1260 for (i = 0; i <= seq->operating_points_cnt_minus_1; i++) {
1261 if (seq->decoder_model_present_for_this_op[i]) {
1262 int op_pt_idc = seq->operating_point_idc[i];
1263 int in_temporal_layer = (op_pt_idc >> priv->temporal_id ) & 1;
1264 int in_spatial_layer = (op_pt_idc >> (priv->spatial_id + 8)) & 1;
1265 if (seq->operating_point_idc[i] == 0 ||
1266 in_temporal_layer || in_spatial_layer) {
1267 fbs(seq->decoder_model_info.buffer_removal_time_length_minus_1 + 1,
1268 buffer_removal_time[i], 1, i);
1275 if (current->frame_type == AV1_FRAME_SWITCH ||
1276 (current->frame_type == AV1_FRAME_KEY && current->show_frame))
1277 infer(refresh_frame_flags, all_frames);
1279 fb(8, refresh_frame_flags);
1281 if (!frame_is_intra || current->refresh_frame_flags != all_frames) {
1282 if (current->error_resilient_mode && seq->enable_order_hint) {
1283 for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
1284 fbs(order_hint_bits, ref_order_hint[i], 1, i);
1285 if (current->ref_order_hint[i] != priv->ref[i].order_hint)
1286 priv->ref[i].valid = 0;
1291 if (current->frame_type == AV1_FRAME_KEY ||
1292 current->frame_type == AV1_FRAME_INTRA_ONLY) {
1293 CHECK(FUNC(frame_size)(ctx, rw, current));
1294 CHECK(FUNC(render_size)(ctx, rw, current));
1296 if (current->allow_screen_content_tools &&
1297 priv->upscaled_width == priv->frame_width)
1298 flag(allow_intrabc);
1300 infer(allow_intrabc, 0);
1303 if (!seq->enable_order_hint) {
1304 infer(frame_refs_short_signaling, 0);
1306 flag(frame_refs_short_signaling);
1307 if (current->frame_refs_short_signaling) {
1308 fb(3, last_frame_idx);
1309 fb(3, golden_frame_idx);
1311 for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
1313 infer(ref_frame_idx[i], current->last_frame_idx);
1314 else if (i == AV1_REF_FRAME_GOLDEN -
1316 infer(ref_frame_idx[i], current->golden_frame_idx);
1318 infer(ref_frame_idx[i], -1);
1323 for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
1324 if (!current->frame_refs_short_signaling)
1325 fbs(3, ref_frame_idx[i], 1, i);
1326 if (seq->frame_id_numbers_present_flag) {
1327 fbs(seq->delta_frame_id_length_minus_2 + 2,
1328 delta_frame_id_minus1[i], 1, i);
1332 if (current->frame_size_override_flag &&
1333 !current->error_resilient_mode) {
1334 CHECK(FUNC(frame_size_with_refs)(ctx, rw, current));
1336 CHECK(FUNC(frame_size)(ctx, rw, current));
1337 CHECK(FUNC(render_size)(ctx, rw, current));
1340 if (current->force_integer_mv)
1341 infer(allow_high_precision_mv, 0);
1343 flag(allow_high_precision_mv);
1345 CHECK(FUNC(interpolation_filter)(ctx, rw, current));
1347 flag(is_motion_mode_switchable);
1349 if (current->error_resilient_mode ||
1350 !seq->enable_ref_frame_mvs)
1351 infer(use_ref_frame_mvs, 0);
1353 flag(use_ref_frame_mvs);
1355 infer(allow_intrabc, 0);
1358 if (!frame_is_intra) {
1359 // Derive reference frame sign biases.
1362 if (seq->reduced_still_picture_header || current->disable_cdf_update)
1363 infer(disable_frame_end_update_cdf, 1);
1365 flag(disable_frame_end_update_cdf);
1367 if (current->primary_ref_frame == AV1_PRIMARY_REF_NONE) {
1368 // Init non-coeff CDFs.
1369 // Setup past independence.
1371 // Load CDF tables from previous frame.
1372 // Load params from previous frame.
1375 if (current->use_ref_frame_mvs) {
1376 // Perform motion field estimation process.
1379 CHECK(FUNC(tile_info)(ctx, rw, current));
1381 CHECK(FUNC(quantization_params)(ctx, rw, current));
1383 CHECK(FUNC(segmentation_params)(ctx, rw, current));
1385 CHECK(FUNC(delta_q_params)(ctx, rw, current));
1387 CHECK(FUNC(delta_lf_params)(ctx, rw, current));
1389 // Init coeff CDFs / load previous segments.
1391 priv->coded_lossless = 1;
1392 for (i = 0; i < AV1_MAX_SEGMENTS; i++) {
1394 if (current->feature_enabled[i][AV1_SEG_LVL_ALT_Q]) {
1395 qindex = (current->base_q_idx +
1396 current->feature_value[i][AV1_SEG_LVL_ALT_Q]);
1398 qindex = current->base_q_idx;
1400 qindex = av_clip_uintp2(qindex, 8);
1402 if (qindex || current->delta_q_y_dc ||
1403 current->delta_q_u_ac || current->delta_q_u_dc ||
1404 current->delta_q_v_ac || current->delta_q_v_dc) {
1405 priv->coded_lossless = 0;
1408 priv->all_lossless = priv->coded_lossless &&
1409 priv->frame_width == priv->upscaled_width;
1411 CHECK(FUNC(loop_filter_params)(ctx, rw, current));
1413 CHECK(FUNC(cdef_params)(ctx, rw, current));
1415 CHECK(FUNC(lr_params)(ctx, rw, current));
1417 CHECK(FUNC(read_tx_mode)(ctx, rw, current));
1419 CHECK(FUNC(frame_reference_mode)(ctx, rw, current));
1421 CHECK(FUNC(skip_mode_params)(ctx, rw, current));
1423 if (frame_is_intra || current->error_resilient_mode ||
1424 !seq->enable_warped_motion)
1425 infer(allow_warped_motion, 0);
1427 flag(allow_warped_motion);
1429 flag(reduced_tx_set);
1431 CHECK(FUNC(global_motion_params)(ctx, rw, current));
1433 CHECK(FUNC(film_grain_params)(ctx, rw, current));
1435 for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
1436 if (current->refresh_frame_flags & (1 << i)) {
1437 priv->ref[i] = (AV1ReferenceFrameState) {
1439 .frame_id = current->current_frame_id,
1440 .upscaled_width = priv->upscaled_width,
1441 .frame_width = priv->frame_width,
1442 .frame_height = priv->frame_height,
1443 .render_width = priv->render_width,
1444 .render_height = priv->render_height,
1445 .frame_type = current->frame_type,
1446 .subsampling_x = seq->color_config.subsampling_x,
1447 .subsampling_y = seq->color_config.subsampling_y,
1448 .bit_depth = priv->bit_depth,
1449 .order_hint = current->order_hint,
1454 av_log(ctx->log_ctx, AV_LOG_DEBUG, "Frame %d: size %dx%d "
1455 "upscaled %d render %dx%d subsample %dx%d "
1456 "bitdepth %d tiles %dx%d.\n", current->order_hint,
1457 priv->frame_width, priv->frame_height, priv->upscaled_width,
1458 priv->render_width, priv->render_height,
1459 seq->color_config.subsampling_x + 1,
1460 seq->color_config.subsampling_y + 1, priv->bit_depth,
1461 priv->tile_rows, priv->tile_cols);
1466 static int FUNC(frame_header_obu)(CodedBitstreamContext *ctx, RWContext *rw,
1467 AV1RawFrameHeader *current, int redundant,
1468 AVBufferRef *rw_buffer_ref)
1470 CodedBitstreamAV1Context *priv = ctx->priv_data;
1471 int start_pos, fh_bits, fh_bytes, err;
1474 if (priv->seen_frame_header) {
1476 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid repeated "
1477 "frame header OBU.\n");
1478 return AVERROR_INVALIDDATA;
1484 HEADER("Redundant Frame Header");
1486 av_assert0(priv->frame_header_ref && priv->frame_header);
1488 init_get_bits(&fh, priv->frame_header,
1489 priv->frame_header_size);
1490 for (i = 0; i < priv->frame_header_size; i += 8) {
1491 b = FFMIN(priv->frame_header_size - i, 8);
1492 val = get_bits(&fh, b);
1493 xf(b, frame_header_copy[i],
1494 val, val, val, 1, i / 8);
1499 HEADER("Redundant Frame Header (used as Frame Header)");
1501 HEADER("Frame Header");
1503 priv->seen_frame_header = 1;
1506 start_pos = get_bits_count(rw);
1508 start_pos = put_bits_count(rw);
1511 CHECK(FUNC(uncompressed_header)(ctx, rw, current));
1513 if (current->show_existing_frame) {
1514 priv->seen_frame_header = 0;
1516 priv->seen_frame_header = 1;
1518 av_buffer_unref(&priv->frame_header_ref);
1521 fh_bits = get_bits_count(rw) - start_pos;
1522 fh_start = (uint8_t*)rw->buffer + start_pos / 8;
1524 // Need to flush the bitwriter so that we can copy its output,
1525 // but use a copy so we don't affect the caller's structure.
1527 PutBitContext tmp = *rw;
1528 flush_put_bits(&tmp);
1531 fh_bits = put_bits_count(rw) - start_pos;
1532 fh_start = rw->buf + start_pos / 8;
1534 fh_bytes = (fh_bits + 7) / 8;
1536 priv->frame_header_size = fh_bits;
1538 if (rw_buffer_ref) {
1539 priv->frame_header_ref = av_buffer_ref(rw_buffer_ref);
1540 if (!priv->frame_header_ref)
1541 return AVERROR(ENOMEM);
1542 priv->frame_header = fh_start;
1544 priv->frame_header_ref =
1545 av_buffer_alloc(fh_bytes + AV_INPUT_BUFFER_PADDING_SIZE);
1546 if (!priv->frame_header_ref)
1547 return AVERROR(ENOMEM);
1548 priv->frame_header = priv->frame_header_ref->data;
1549 memcpy(priv->frame_header, fh_start, fh_bytes);
1557 static int FUNC(tile_group_obu)(CodedBitstreamContext *ctx, RWContext *rw,
1558 AV1RawTileGroup *current)
1560 CodedBitstreamAV1Context *priv = ctx->priv_data;
1561 int num_tiles, tile_bits;
1564 HEADER("Tile Group");
1566 num_tiles = priv->tile_cols * priv->tile_rows;
1568 flag(tile_start_and_end_present_flag);
1570 infer(tile_start_and_end_present_flag, 0);
1572 if (num_tiles == 1 || !current->tile_start_and_end_present_flag) {
1574 infer(tg_end, num_tiles - 1);
1576 tile_bits = cbs_av1_tile_log2(1, priv->tile_cols) +
1577 cbs_av1_tile_log2(1, priv->tile_rows);
1578 fb(tile_bits, tg_start);
1579 fb(tile_bits, tg_end);
1582 CHECK(FUNC(byte_alignment)(ctx, rw));
1584 // Reset header for next frame.
1585 if (current->tg_end == num_tiles - 1)
1586 priv->seen_frame_header = 0;
1588 // Tile data follows.
1593 static int FUNC(frame_obu)(CodedBitstreamContext *ctx, RWContext *rw,
1594 AV1RawFrame *current,
1595 AVBufferRef *rw_buffer_ref)
1599 CHECK(FUNC(frame_header_obu)(ctx, rw, ¤t->header,
1602 CHECK(FUNC(byte_alignment)(ctx, rw));
1604 CHECK(FUNC(tile_group_obu)(ctx, rw, ¤t->tile_group));
1609 static int FUNC(tile_list_obu)(CodedBitstreamContext *ctx, RWContext *rw,
1610 AV1RawTileList *current)
1614 fb(8, output_frame_width_in_tiles_minus_1);
1615 fb(8, output_frame_height_in_tiles_minus_1);
1617 fb(16, tile_count_minus_1);
1619 // Tile data follows.
1624 static int FUNC(metadata_hdr_cll)(CodedBitstreamContext *ctx, RWContext *rw,
1625 AV1RawMetadataHDRCLL *current)
1635 static int FUNC(metadata_hdr_mdcv)(CodedBitstreamContext *ctx, RWContext *rw,
1636 AV1RawMetadataHDRMDCV *current)
1640 for (i = 0; i < 3; i++) {
1641 fbs(16, primary_chromaticity_x[i], 1, i);
1642 fbs(16, primary_chromaticity_y[i], 1, i);
1645 fb(16, white_point_chromaticity_x);
1646 fb(16, white_point_chromaticity_y);
1648 fc(32, luminance_max, 1, MAX_UINT_BITS(32));
1649 // luminance_min must be lower than luminance_max. Convert luminance_max from
1650 // 24.8 fixed point to 18.14 fixed point in order to compare them.
1651 fc(32, luminance_min, 0, FFMIN(((uint64_t)current->luminance_max << 6) - 1,
1652 MAX_UINT_BITS(32)));
1657 static int FUNC(scalability_structure)(CodedBitstreamContext *ctx, RWContext *rw,
1658 AV1RawMetadataScalability *current)
1660 CodedBitstreamAV1Context *priv = ctx->priv_data;
1661 const AV1RawSequenceHeader *seq;
1664 if (!priv->sequence_header) {
1665 av_log(ctx->log_ctx, AV_LOG_ERROR, "No sequence header available: "
1666 "unable to parse scalability metadata.\n");
1667 return AVERROR_INVALIDDATA;
1669 seq = priv->sequence_header;
1671 fb(2, spatial_layers_cnt_minus_1);
1672 flag(spatial_layer_dimensions_present_flag);
1673 flag(spatial_layer_description_present_flag);
1674 flag(temporal_group_description_present_flag);
1675 fc(3, scalability_structure_reserved_3bits, 0, 0);
1676 if (current->spatial_layer_dimensions_present_flag) {
1677 for (i = 0; i <= current->spatial_layers_cnt_minus_1; i++) {
1678 fcs(16, spatial_layer_max_width[i],
1679 0, seq->max_frame_width_minus_1 + 1, 1, i);
1680 fcs(16, spatial_layer_max_height[i],
1681 0, seq->max_frame_height_minus_1 + 1, 1, i);
1684 if (current->spatial_layer_description_present_flag) {
1685 for (i = 0; i <= current->spatial_layers_cnt_minus_1; i++)
1686 fbs(8, spatial_layer_ref_id[i], 1, i);
1688 if (current->temporal_group_description_present_flag) {
1689 fb(8, temporal_group_size);
1690 for (i = 0; i < current->temporal_group_size; i++) {
1691 fbs(3, temporal_group_temporal_id[i], 1, i);
1692 flags(temporal_group_temporal_switching_up_point_flag[i], 1, i);
1693 flags(temporal_group_spatial_switching_up_point_flag[i], 1, i);
1694 fbs(3, temporal_group_ref_cnt[i], 1, i);
1695 for (j = 0; j < current->temporal_group_ref_cnt[i]; j++) {
1696 fbs(8, temporal_group_ref_pic_diff[i][j], 2, i, j);
1704 static int FUNC(metadata_scalability)(CodedBitstreamContext *ctx, RWContext *rw,
1705 AV1RawMetadataScalability *current)
1709 fb(8, scalability_mode_idc);
1711 if (current->scalability_mode_idc == AV1_SCALABILITY_SS)
1712 CHECK(FUNC(scalability_structure)(ctx, rw, current));
1717 static int FUNC(metadata_itut_t35)(CodedBitstreamContext *ctx, RWContext *rw,
1718 AV1RawMetadataITUTT35 *current)
1723 fb(8, itu_t_t35_country_code);
1724 if (current->itu_t_t35_country_code == 0xff)
1725 fb(8, itu_t_t35_country_code_extension_byte);
1728 // The payload runs up to the start of the trailing bits, but there might
1729 // be arbitrarily many trailing zeroes so we need to read through twice.
1730 current->payload_size = cbs_av1_get_payload_bytes_left(rw);
1732 current->payload_ref = av_buffer_alloc(current->payload_size);
1733 if (!current->payload_ref)
1734 return AVERROR(ENOMEM);
1735 current->payload = current->payload_ref->data;
1738 for (i = 0; i < current->payload_size; i++)
1739 xf(8, itu_t_t35_payload_bytes[i], current->payload[i],
1745 static int FUNC(metadata_timecode)(CodedBitstreamContext *ctx, RWContext *rw,
1746 AV1RawMetadataTimecode *current)
1750 fb(5, counting_type);
1751 flag(full_timestamp_flag);
1752 flag(discontinuity_flag);
1753 flag(cnt_dropped_flag);
1756 if (current->full_timestamp_flag) {
1757 fc(6, seconds_value, 0, 59);
1758 fc(6, minutes_value, 0, 59);
1759 fc(5, hours_value, 0, 23);
1762 if (current->seconds_flag) {
1763 fc(6, seconds_value, 0, 59);
1765 if (current->minutes_flag) {
1766 fc(6, minutes_value, 0, 59);
1768 if (current->hours_flag)
1769 fc(5, hours_value, 0, 23);
1774 fb(5, time_offset_length);
1775 if (current->time_offset_length > 0)
1776 fb(current->time_offset_length, time_offset_value);
1778 infer(time_offset_length, 0);
1783 static int FUNC(metadata_obu)(CodedBitstreamContext *ctx, RWContext *rw,
1784 AV1RawMetadata *current)
1788 leb128(metadata_type);
1790 switch (current->metadata_type) {
1791 case AV1_METADATA_TYPE_HDR_CLL:
1792 CHECK(FUNC(metadata_hdr_cll)(ctx, rw, ¤t->metadata.hdr_cll));
1794 case AV1_METADATA_TYPE_HDR_MDCV:
1795 CHECK(FUNC(metadata_hdr_mdcv)(ctx, rw, ¤t->metadata.hdr_mdcv));
1797 case AV1_METADATA_TYPE_SCALABILITY:
1798 CHECK(FUNC(metadata_scalability)(ctx, rw, ¤t->metadata.scalability));
1800 case AV1_METADATA_TYPE_ITUT_T35:
1801 CHECK(FUNC(metadata_itut_t35)(ctx, rw, ¤t->metadata.itut_t35));
1803 case AV1_METADATA_TYPE_TIMECODE:
1804 CHECK(FUNC(metadata_timecode)(ctx, rw, ¤t->metadata.timecode));
1807 // Unknown metadata type.
1808 return AVERROR_PATCHWELCOME;
1814 static int FUNC(padding_obu)(CodedBitstreamContext *ctx, RWContext *rw,
1815 AV1RawPadding *current)
1822 // The payload runs up to the start of the trailing bits, but there might
1823 // be arbitrarily many trailing zeroes so we need to read through twice.
1824 current->payload_size = cbs_av1_get_payload_bytes_left(rw);
1826 current->payload_ref = av_buffer_alloc(current->payload_size);
1827 if (!current->payload_ref)
1828 return AVERROR(ENOMEM);
1829 current->payload = current->payload_ref->data;
1832 for (i = 0; i < current->payload_size; i++)
1833 xf(8, obu_padding_byte[i], current->payload[i], 0x00, 0xff, 1, i);