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)
22 CodedBitstreamAV1Context *priv = ctx->priv_data;
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);
40 infer(temporal_id, 0);
44 priv->temporal_id = current->temporal_id;
45 priv->spatial_id = current->spatial_id;
50 static int FUNC(trailing_bits)(CodedBitstreamContext *ctx, RWContext *rw, int nb_bits)
54 av_assert0(nb_bits > 0);
56 fixed(1, trailing_one_bit, 1);
60 fixed(1, trailing_zero_bit, 0);
67 static int FUNC(byte_alignment)(CodedBitstreamContext *ctx, RWContext *rw)
71 while (byte_alignment(rw) != 0)
72 fixed(1, zero_bit, 0);
77 static int FUNC(color_config)(CodedBitstreamContext *ctx, RWContext *rw,
78 AV1RawColorConfig *current, int seq_profile)
80 CodedBitstreamAV1Context *priv = ctx->priv_data;
85 if (seq_profile == FF_PROFILE_AV1_PROFESSIONAL &&
86 current->high_bitdepth) {
88 priv->bit_depth = current->twelve_bit ? 12 : 10;
90 priv->bit_depth = current->high_bitdepth ? 10 : 8;
93 if (seq_profile == FF_PROFILE_AV1_HIGH)
94 infer(mono_chrome, 0);
97 priv->num_planes = current->mono_chrome ? 1 : 3;
99 flag(color_description_present_flag);
100 if (current->color_description_present_flag) {
101 fb(8, color_primaries);
102 fb(8, transfer_characteristics);
103 fb(8, matrix_coefficients);
105 infer(color_primaries, AVCOL_PRI_UNSPECIFIED);
106 infer(transfer_characteristics, AVCOL_TRC_UNSPECIFIED);
107 infer(matrix_coefficients, AVCOL_SPC_UNSPECIFIED);
110 if (current->mono_chrome) {
113 infer(subsampling_x, 1);
114 infer(subsampling_y, 1);
115 infer(chroma_sample_position, AV1_CSP_UNKNOWN);
116 infer(separate_uv_delta_q, 0);
118 } else if (current->color_primaries == AVCOL_PRI_BT709 &&
119 current->transfer_characteristics == AVCOL_TRC_IEC61966_2_1 &&
120 current->matrix_coefficients == AVCOL_SPC_RGB) {
121 infer(color_range, 1);
122 infer(subsampling_x, 0);
123 infer(subsampling_y, 0);
124 flag(separate_uv_delta_q);
129 if (seq_profile == FF_PROFILE_AV1_MAIN) {
130 infer(subsampling_x, 1);
131 infer(subsampling_y, 1);
132 } else if (seq_profile == FF_PROFILE_AV1_HIGH) {
133 infer(subsampling_x, 0);
134 infer(subsampling_y, 0);
136 if (priv->bit_depth == 12) {
137 fb(1, subsampling_x);
138 if (current->subsampling_x)
139 fb(1, subsampling_y);
141 infer(subsampling_y, 0);
143 infer(subsampling_x, 1);
144 infer(subsampling_y, 0);
147 if (current->subsampling_x && current->subsampling_y) {
148 fc(2, chroma_sample_position, AV1_CSP_UNKNOWN,
152 flag(separate_uv_delta_q);
158 static int FUNC(timing_info)(CodedBitstreamContext *ctx, RWContext *rw,
159 AV1RawTimingInfo *current)
163 fc(32, num_units_in_display_tick, 1, MAX_UINT_BITS(32));
164 fc(32, time_scale, 1, MAX_UINT_BITS(32));
166 flag(equal_picture_interval);
167 if (current->equal_picture_interval)
168 uvlc(num_ticks_per_picture_minus_1, 0, MAX_UINT_BITS(32) - 1);
173 static int FUNC(decoder_model_info)(CodedBitstreamContext *ctx, RWContext *rw,
174 AV1RawDecoderModelInfo *current)
178 fb(5, buffer_delay_length_minus_1);
179 fb(32, num_units_in_decoding_tick);
180 fb(5, buffer_removal_time_length_minus_1);
181 fb(5, frame_presentation_time_length_minus_1);
186 static int FUNC(sequence_header_obu)(CodedBitstreamContext *ctx, RWContext *rw,
187 AV1RawSequenceHeader *current)
191 HEADER("Sequence Header");
193 fc(3, seq_profile, FF_PROFILE_AV1_MAIN,
194 FF_PROFILE_AV1_PROFESSIONAL);
196 flag(reduced_still_picture_header);
198 if (current->reduced_still_picture_header) {
199 infer(timing_info_present_flag, 0);
200 infer(decoder_model_info_present_flag, 0);
201 infer(initial_display_delay_present_flag, 0);
202 infer(operating_points_cnt_minus_1, 0);
203 infer(operating_point_idc[0], 0);
205 fb(5, seq_level_idx[0]);
207 infer(seq_tier[0], 0);
208 infer(decoder_model_present_for_this_op[0], 0);
209 infer(initial_display_delay_present_for_this_op[0], 0);
212 flag(timing_info_present_flag);
213 if (current->timing_info_present_flag) {
214 CHECK(FUNC(timing_info)(ctx, rw, ¤t->timing_info));
216 flag(decoder_model_info_present_flag);
217 if (current->decoder_model_info_present_flag) {
218 CHECK(FUNC(decoder_model_info)
219 (ctx, rw, ¤t->decoder_model_info));
222 infer(decoder_model_info_present_flag, 0);
225 flag(initial_display_delay_present_flag);
227 fb(5, operating_points_cnt_minus_1);
228 for (i = 0; i <= current->operating_points_cnt_minus_1; i++) {
229 fbs(12, operating_point_idc[i], 1, i);
230 fbs(5, seq_level_idx[i], 1, i);
232 if (current->seq_level_idx[i] > 7)
233 flags(seq_tier[i], 1, i);
235 infer(seq_tier[i], 0);
237 if (current->decoder_model_info_present_flag) {
238 flags(decoder_model_present_for_this_op[i], 1, i);
239 if (current->decoder_model_present_for_this_op[i]) {
240 int n = current->decoder_model_info.buffer_delay_length_minus_1 + 1;
241 fbs(n, decoder_buffer_delay[i], 1, i);
242 fbs(n, encoder_buffer_delay[i], 1, i);
243 flags(low_delay_mode_flag[i], 1, i);
246 infer(decoder_model_present_for_this_op[i], 0);
249 if (current->initial_display_delay_present_flag) {
250 flags(initial_display_delay_present_for_this_op[i], 1, i);
251 if (current->initial_display_delay_present_for_this_op[i])
252 fbs(4, initial_display_delay_minus_1[i], 1, i);
257 fb(4, frame_width_bits_minus_1);
258 fb(4, frame_height_bits_minus_1);
260 fb(current->frame_width_bits_minus_1 + 1, max_frame_width_minus_1);
261 fb(current->frame_height_bits_minus_1 + 1, max_frame_height_minus_1);
263 if (current->reduced_still_picture_header)
264 infer(frame_id_numbers_present_flag, 0);
266 flag(frame_id_numbers_present_flag);
267 if (current->frame_id_numbers_present_flag) {
268 fb(4, delta_frame_id_length_minus_2);
269 fb(3, additional_frame_id_length_minus_1);
272 flag(use_128x128_superblock);
273 flag(enable_filter_intra);
274 flag(enable_intra_edge_filter);
276 if (current->reduced_still_picture_header) {
277 infer(enable_interintra_compound, 0);
278 infer(enable_masked_compound, 0);
279 infer(enable_warped_motion, 0);
280 infer(enable_dual_filter, 0);
281 infer(enable_order_hint, 0);
282 infer(enable_jnt_comp, 0);
283 infer(enable_ref_frame_mvs, 0);
285 infer(seq_force_screen_content_tools,
286 AV1_SELECT_SCREEN_CONTENT_TOOLS);
287 infer(seq_force_integer_mv,
288 AV1_SELECT_INTEGER_MV);
290 flag(enable_interintra_compound);
291 flag(enable_masked_compound);
292 flag(enable_warped_motion);
293 flag(enable_dual_filter);
295 flag(enable_order_hint);
296 if (current->enable_order_hint) {
297 flag(enable_jnt_comp);
298 flag(enable_ref_frame_mvs);
300 infer(enable_jnt_comp, 0);
301 infer(enable_ref_frame_mvs, 0);
304 flag(seq_choose_screen_content_tools);
305 if (current->seq_choose_screen_content_tools)
306 infer(seq_force_screen_content_tools,
307 AV1_SELECT_SCREEN_CONTENT_TOOLS);
309 fb(1, seq_force_screen_content_tools);
310 if (current->seq_force_screen_content_tools > 0) {
311 flag(seq_choose_integer_mv);
312 if (current->seq_choose_integer_mv)
313 infer(seq_force_integer_mv,
314 AV1_SELECT_INTEGER_MV);
316 fb(1, seq_force_integer_mv);
318 infer(seq_force_integer_mv, AV1_SELECT_INTEGER_MV);
321 if (current->enable_order_hint)
322 fb(3, order_hint_bits_minus_1);
325 flag(enable_superres);
327 flag(enable_restoration);
329 CHECK(FUNC(color_config)(ctx, rw, ¤t->color_config,
330 current->seq_profile));
332 flag(film_grain_params_present);
337 static int FUNC(temporal_delimiter_obu)(CodedBitstreamContext *ctx, RWContext *rw)
339 CodedBitstreamAV1Context *priv = ctx->priv_data;
341 HEADER("Temporal Delimiter");
343 priv->seen_frame_header = 0;
348 static int FUNC(set_frame_refs)(CodedBitstreamContext *ctx, RWContext *rw,
349 AV1RawFrameHeader *current)
351 CodedBitstreamAV1Context *priv = ctx->priv_data;
352 const AV1RawSequenceHeader *seq = priv->sequence_header;
353 static const uint8_t ref_frame_list[AV1_NUM_REF_FRAMES - 2] = {
354 AV1_REF_FRAME_LAST2, AV1_REF_FRAME_LAST3, AV1_REF_FRAME_BWDREF,
355 AV1_REF_FRAME_ALTREF2, AV1_REF_FRAME_ALTREF
357 int8_t ref_frame_idx[AV1_REFS_PER_FRAME], used_frame[AV1_NUM_REF_FRAMES];
358 int8_t shifted_order_hints[AV1_NUM_REF_FRAMES];
359 int cur_frame_hint, latest_order_hint, earliest_order_hint, ref;
362 for (i = 0; i < AV1_REFS_PER_FRAME; i++)
363 ref_frame_idx[i] = -1;
364 ref_frame_idx[AV1_REF_FRAME_LAST - AV1_REF_FRAME_LAST] = current->last_frame_idx;
365 ref_frame_idx[AV1_REF_FRAME_GOLDEN - AV1_REF_FRAME_LAST] = current->golden_frame_idx;
367 for (i = 0; i < AV1_NUM_REF_FRAMES; i++)
369 used_frame[current->last_frame_idx] = 1;
370 used_frame[current->golden_frame_idx] = 1;
372 cur_frame_hint = 1 << (seq->order_hint_bits_minus_1);
373 for (i = 0; i < AV1_NUM_REF_FRAMES; i++)
374 shifted_order_hints[i] = cur_frame_hint +
375 cbs_av1_get_relative_dist(seq, priv->ref[i].order_hint,
378 latest_order_hint = shifted_order_hints[current->last_frame_idx];
379 earliest_order_hint = shifted_order_hints[current->golden_frame_idx];
382 for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
383 int hint = shifted_order_hints[i];
384 if (!used_frame[i] && hint >= cur_frame_hint &&
385 (ref < 0 || hint >= latest_order_hint)) {
387 latest_order_hint = hint;
391 ref_frame_idx[AV1_REF_FRAME_ALTREF - AV1_REF_FRAME_LAST] = ref;
396 for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
397 int hint = shifted_order_hints[i];
398 if (!used_frame[i] && hint >= cur_frame_hint &&
399 (ref < 0 || hint < earliest_order_hint)) {
401 earliest_order_hint = hint;
405 ref_frame_idx[AV1_REF_FRAME_BWDREF - AV1_REF_FRAME_LAST] = ref;
410 for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
411 int hint = shifted_order_hints[i];
412 if (!used_frame[i] && hint >= cur_frame_hint &&
413 (ref < 0 || hint < earliest_order_hint)) {
415 earliest_order_hint = hint;
419 ref_frame_idx[AV1_REF_FRAME_ALTREF2 - AV1_REF_FRAME_LAST] = ref;
423 for (i = 0; i < AV1_REFS_PER_FRAME - 2; i++) {
424 int ref_frame = ref_frame_list[i];
425 if (ref_frame_idx[ref_frame - AV1_REF_FRAME_LAST] < 0 ) {
427 for (j = 0; j < AV1_NUM_REF_FRAMES; j++) {
428 int hint = shifted_order_hints[j];
429 if (!used_frame[j] && hint < cur_frame_hint &&
430 (ref < 0 || hint >= latest_order_hint)) {
432 latest_order_hint = hint;
436 ref_frame_idx[ref_frame - AV1_REF_FRAME_LAST] = ref;
443 for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
444 int hint = shifted_order_hints[i];
445 if (ref < 0 || hint < earliest_order_hint) {
447 earliest_order_hint = hint;
450 for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
451 if (ref_frame_idx[i] < 0)
452 ref_frame_idx[i] = ref;
453 infer(ref_frame_idx[i], ref_frame_idx[i]);
459 static int FUNC(superres_params)(CodedBitstreamContext *ctx, RWContext *rw,
460 AV1RawFrameHeader *current)
462 CodedBitstreamAV1Context *priv = ctx->priv_data;
463 const AV1RawSequenceHeader *seq = priv->sequence_header;
466 if (seq->enable_superres)
469 infer(use_superres, 0);
471 if (current->use_superres) {
473 denom = current->coded_denom + AV1_SUPERRES_DENOM_MIN;
475 denom = AV1_SUPERRES_NUM;
478 priv->upscaled_width = priv->frame_width;
479 priv->frame_width = (priv->upscaled_width * AV1_SUPERRES_NUM +
485 static int FUNC(frame_size)(CodedBitstreamContext *ctx, RWContext *rw,
486 AV1RawFrameHeader *current)
488 CodedBitstreamAV1Context *priv = ctx->priv_data;
489 const AV1RawSequenceHeader *seq = priv->sequence_header;
492 if (current->frame_size_override_flag) {
493 fb(seq->frame_width_bits_minus_1 + 1, frame_width_minus_1);
494 fb(seq->frame_height_bits_minus_1 + 1, frame_height_minus_1);
496 infer(frame_width_minus_1, seq->max_frame_width_minus_1);
497 infer(frame_height_minus_1, seq->max_frame_height_minus_1);
500 priv->frame_width = current->frame_width_minus_1 + 1;
501 priv->frame_height = current->frame_height_minus_1 + 1;
503 CHECK(FUNC(superres_params)(ctx, rw, current));
508 static int FUNC(render_size)(CodedBitstreamContext *ctx, RWContext *rw,
509 AV1RawFrameHeader *current)
511 CodedBitstreamAV1Context *priv = ctx->priv_data;
514 flag(render_and_frame_size_different);
516 if (current->render_and_frame_size_different) {
517 fb(16, render_width_minus_1);
518 fb(16, render_height_minus_1);
520 infer(render_width_minus_1, current->frame_width_minus_1);
521 infer(render_height_minus_1, current->frame_height_minus_1);
524 priv->render_width = current->render_width_minus_1 + 1;
525 priv->render_height = current->render_height_minus_1 + 1;
530 static int FUNC(frame_size_with_refs)(CodedBitstreamContext *ctx, RWContext *rw,
531 AV1RawFrameHeader *current)
533 CodedBitstreamAV1Context *priv = ctx->priv_data;
536 for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
537 flags(found_ref[i], 1, i);
538 if (current->found_ref[i]) {
539 AV1ReferenceFrameState *ref =
540 &priv->ref[current->ref_frame_idx[i]];
543 av_log(ctx->log_ctx, AV_LOG_ERROR,
544 "Missing reference frame needed for frame size "
545 "(ref = %d, ref_frame_idx = %d).\n",
546 i, current->ref_frame_idx[i]);
547 return AVERROR_INVALIDDATA;
550 infer(frame_width_minus_1, ref->upscaled_width - 1);
551 infer(frame_height_minus_1, ref->frame_height - 1);
552 infer(render_width_minus_1, ref->render_width - 1);
553 infer(render_height_minus_1, ref->render_height - 1);
555 priv->upscaled_width = ref->upscaled_width;
556 priv->frame_width = priv->upscaled_width;
557 priv->frame_height = ref->frame_height;
558 priv->render_width = ref->render_width;
559 priv->render_height = ref->render_height;
564 if (i >= AV1_REFS_PER_FRAME) {
565 CHECK(FUNC(frame_size)(ctx, rw, current));
566 CHECK(FUNC(render_size)(ctx, rw, current));
568 CHECK(FUNC(superres_params)(ctx, rw, current));
574 static int FUNC(interpolation_filter)(CodedBitstreamContext *ctx, RWContext *rw,
575 AV1RawFrameHeader *current)
579 flag(is_filter_switchable);
580 if (current->is_filter_switchable)
581 infer(interpolation_filter,
582 AV1_INTERPOLATION_FILTER_SWITCHABLE);
584 fb(2, interpolation_filter);
589 static int FUNC(tile_info)(CodedBitstreamContext *ctx, RWContext *rw,
590 AV1RawFrameHeader *current)
592 CodedBitstreamAV1Context *priv = ctx->priv_data;
593 const AV1RawSequenceHeader *seq = priv->sequence_header;
594 int mi_cols, mi_rows, sb_cols, sb_rows, sb_shift, sb_size;
595 int max_tile_width_sb, max_tile_height_sb, max_tile_area_sb;
596 int min_log2_tile_cols, max_log2_tile_cols, max_log2_tile_rows;
597 int min_log2_tiles, min_log2_tile_rows;
600 mi_cols = 2 * ((priv->frame_width + 7) >> 3);
601 mi_rows = 2 * ((priv->frame_height + 7) >> 3);
603 sb_cols = seq->use_128x128_superblock ? ((mi_cols + 31) >> 5)
604 : ((mi_cols + 15) >> 4);
605 sb_rows = seq->use_128x128_superblock ? ((mi_rows + 31) >> 5)
606 : ((mi_rows + 15) >> 4);
608 sb_shift = seq->use_128x128_superblock ? 5 : 4;
609 sb_size = sb_shift + 2;
611 max_tile_width_sb = AV1_MAX_TILE_WIDTH >> sb_size;
612 max_tile_area_sb = AV1_MAX_TILE_AREA >> (2 * sb_size);
614 min_log2_tile_cols = cbs_av1_tile_log2(max_tile_width_sb, sb_cols);
615 max_log2_tile_cols = cbs_av1_tile_log2(1, FFMIN(sb_cols, AV1_MAX_TILE_COLS));
616 max_log2_tile_rows = cbs_av1_tile_log2(1, FFMIN(sb_rows, AV1_MAX_TILE_ROWS));
617 min_log2_tiles = FFMAX(min_log2_tile_cols,
618 cbs_av1_tile_log2(max_tile_area_sb, sb_rows * sb_cols));
620 flag(uniform_tile_spacing_flag);
622 if (current->uniform_tile_spacing_flag) {
623 int tile_width_sb, tile_height_sb;
625 increment(tile_cols_log2, min_log2_tile_cols, max_log2_tile_cols);
627 tile_width_sb = (sb_cols + (1 << current->tile_cols_log2) - 1) >>
628 current->tile_cols_log2;
629 current->tile_cols = (sb_cols + tile_width_sb - 1) / tile_width_sb;
631 min_log2_tile_rows = FFMAX(min_log2_tiles - current->tile_cols_log2, 0);
633 increment(tile_rows_log2, min_log2_tile_rows, max_log2_tile_rows);
635 tile_height_sb = (sb_rows + (1 << current->tile_rows_log2) - 1) >>
636 current->tile_rows_log2;
637 current->tile_rows = (sb_rows + tile_height_sb - 1) / tile_height_sb;
639 for (i = 0; i < current->tile_cols - 1; i++)
640 infer(width_in_sbs_minus_1[i], tile_width_sb - 1);
641 infer(width_in_sbs_minus_1[i],
642 sb_cols - (current->tile_cols - 1) * tile_width_sb - 1);
643 for (i = 0; i < current->tile_rows - 1; i++)
644 infer(height_in_sbs_minus_1[i], tile_height_sb - 1);
645 infer(height_in_sbs_minus_1[i],
646 sb_rows - (current->tile_rows - 1) * tile_height_sb - 1);
649 int widest_tile_sb, start_sb, size_sb, max_width, max_height;
654 for (i = 0; start_sb < sb_cols && i < AV1_MAX_TILE_COLS; i++) {
655 max_width = FFMIN(sb_cols - start_sb, max_tile_width_sb);
656 ns(max_width, width_in_sbs_minus_1[i], 1, i);
657 size_sb = current->width_in_sbs_minus_1[i] + 1;
658 widest_tile_sb = FFMAX(size_sb, widest_tile_sb);
661 current->tile_cols_log2 = cbs_av1_tile_log2(1, i);
662 current->tile_cols = i;
664 if (min_log2_tiles > 0)
665 max_tile_area_sb = (sb_rows * sb_cols) >> (min_log2_tiles + 1);
667 max_tile_area_sb = sb_rows * sb_cols;
668 max_tile_height_sb = FFMAX(max_tile_area_sb / widest_tile_sb, 1);
671 for (i = 0; start_sb < sb_rows && i < AV1_MAX_TILE_ROWS; i++) {
672 max_height = FFMIN(sb_rows - start_sb, max_tile_height_sb);
673 ns(max_height, height_in_sbs_minus_1[i], 1, i);
674 size_sb = current->height_in_sbs_minus_1[i] + 1;
677 current->tile_rows_log2 = cbs_av1_tile_log2(1, i);
678 current->tile_rows = i;
681 if (current->tile_cols_log2 > 0 ||
682 current->tile_rows_log2 > 0) {
683 fb(current->tile_cols_log2 + current->tile_rows_log2,
684 context_update_tile_id);
685 fb(2, tile_size_bytes_minus1);
687 infer(context_update_tile_id, 0);
690 priv->tile_cols = current->tile_cols;
691 priv->tile_rows = current->tile_rows;
696 static int FUNC(quantization_params)(CodedBitstreamContext *ctx, RWContext *rw,
697 AV1RawFrameHeader *current)
699 CodedBitstreamAV1Context *priv = ctx->priv_data;
700 const AV1RawSequenceHeader *seq = priv->sequence_header;
705 delta_q(delta_q_y_dc);
707 if (priv->num_planes > 1) {
708 if (seq->color_config.separate_uv_delta_q)
711 infer(diff_uv_delta, 0);
713 delta_q(delta_q_u_dc);
714 delta_q(delta_q_u_ac);
716 if (current->diff_uv_delta) {
717 delta_q(delta_q_v_dc);
718 delta_q(delta_q_v_ac);
720 infer(delta_q_v_dc, current->delta_q_u_dc);
721 infer(delta_q_v_ac, current->delta_q_u_ac);
724 infer(delta_q_u_dc, 0);
725 infer(delta_q_u_ac, 0);
726 infer(delta_q_v_dc, 0);
727 infer(delta_q_v_ac, 0);
731 if (current->using_qmatrix) {
734 if (seq->color_config.separate_uv_delta_q)
737 infer(qm_v, current->qm_u);
743 static int FUNC(segmentation_params)(CodedBitstreamContext *ctx, RWContext *rw,
744 AV1RawFrameHeader *current)
746 CodedBitstreamAV1Context *priv = ctx->priv_data;
747 static const uint8_t bits[AV1_SEG_LVL_MAX] = { 8, 6, 6, 6, 6, 3, 0, 0 };
748 static const uint8_t sign[AV1_SEG_LVL_MAX] = { 1, 1, 1, 1, 1, 0, 0, 0 };
749 static const uint8_t default_feature_enabled[AV1_SEG_LVL_MAX] = { 0 };
750 static const int16_t default_feature_value[AV1_SEG_LVL_MAX] = { 0 };
753 flag(segmentation_enabled);
755 if (current->segmentation_enabled) {
756 if (current->primary_ref_frame == AV1_PRIMARY_REF_NONE) {
757 infer(segmentation_update_map, 1);
758 infer(segmentation_temporal_update, 0);
759 infer(segmentation_update_data, 1);
761 flag(segmentation_update_map);
762 if (current->segmentation_update_map)
763 flag(segmentation_temporal_update);
765 infer(segmentation_temporal_update, 0);
766 flag(segmentation_update_data);
769 for (i = 0; i < AV1_MAX_SEGMENTS; i++) {
770 const uint8_t *ref_feature_enabled;
771 const int16_t *ref_feature_value;
773 if (current->primary_ref_frame == AV1_PRIMARY_REF_NONE) {
774 ref_feature_enabled = default_feature_enabled;
775 ref_feature_value = default_feature_value;
777 ref_feature_enabled =
778 priv->ref[current->ref_frame_idx[current->primary_ref_frame]].feature_enabled[i];
780 priv->ref[current->ref_frame_idx[current->primary_ref_frame]].feature_value[i];
783 for (j = 0; j < AV1_SEG_LVL_MAX; j++) {
784 if (current->segmentation_update_data) {
785 flags(feature_enabled[i][j], 2, i, j);
787 if (current->feature_enabled[i][j] && bits[j] > 0) {
789 sus(1 + bits[j], feature_value[i][j], 2, i, j);
791 fbs(bits[j], feature_value[i][j], 2, i, j);
793 infer(feature_value[i][j], 0);
796 infer(feature_enabled[i][j], ref_feature_enabled[j]);
797 infer(feature_value[i][j], ref_feature_value[j]);
802 for (i = 0; i < AV1_MAX_SEGMENTS; i++) {
803 for (j = 0; j < AV1_SEG_LVL_MAX; j++) {
804 infer(feature_enabled[i][j], 0);
805 infer(feature_value[i][j], 0);
813 static int FUNC(delta_q_params)(CodedBitstreamContext *ctx, RWContext *rw,
814 AV1RawFrameHeader *current)
818 if (current->base_q_idx > 0)
819 flag(delta_q_present);
821 infer(delta_q_present, 0);
823 if (current->delta_q_present)
829 static int FUNC(delta_lf_params)(CodedBitstreamContext *ctx, RWContext *rw,
830 AV1RawFrameHeader *current)
834 if (current->delta_q_present) {
835 if (!current->allow_intrabc)
836 flag(delta_lf_present);
838 infer(delta_lf_present, 0);
839 if (current->delta_lf_present) {
841 flag(delta_lf_multi);
843 infer(delta_lf_res, 0);
844 infer(delta_lf_multi, 0);
847 infer(delta_lf_present, 0);
848 infer(delta_lf_res, 0);
849 infer(delta_lf_multi, 0);
855 static int FUNC(loop_filter_params)(CodedBitstreamContext *ctx, RWContext *rw,
856 AV1RawFrameHeader *current)
858 CodedBitstreamAV1Context *priv = ctx->priv_data;
859 static const int8_t default_loop_filter_ref_deltas[AV1_TOTAL_REFS_PER_FRAME] =
860 { 1, 0, 0, 0, -1, 0, -1, -1 };
861 static const int8_t default_loop_filter_mode_deltas[2] = { 0, 0 };
864 if (priv->coded_lossless || current->allow_intrabc) {
865 infer(loop_filter_level[0], 0);
866 infer(loop_filter_level[1], 0);
867 infer(loop_filter_ref_deltas[AV1_REF_FRAME_INTRA], 1);
868 infer(loop_filter_ref_deltas[AV1_REF_FRAME_LAST], 0);
869 infer(loop_filter_ref_deltas[AV1_REF_FRAME_LAST2], 0);
870 infer(loop_filter_ref_deltas[AV1_REF_FRAME_LAST3], 0);
871 infer(loop_filter_ref_deltas[AV1_REF_FRAME_BWDREF], 0);
872 infer(loop_filter_ref_deltas[AV1_REF_FRAME_GOLDEN], -1);
873 infer(loop_filter_ref_deltas[AV1_REF_FRAME_ALTREF], -1);
874 infer(loop_filter_ref_deltas[AV1_REF_FRAME_ALTREF2], -1);
875 for (i = 0; i < 2; i++)
876 infer(loop_filter_mode_deltas[i], 0);
880 fb(6, loop_filter_level[0]);
881 fb(6, loop_filter_level[1]);
883 if (priv->num_planes > 1) {
884 if (current->loop_filter_level[0] ||
885 current->loop_filter_level[1]) {
886 fb(6, loop_filter_level[2]);
887 fb(6, loop_filter_level[3]);
891 fb(3, loop_filter_sharpness);
893 flag(loop_filter_delta_enabled);
894 if (current->loop_filter_delta_enabled) {
895 const int8_t *ref_loop_filter_ref_deltas, *ref_loop_filter_mode_deltas;
897 if (current->primary_ref_frame == AV1_PRIMARY_REF_NONE) {
898 ref_loop_filter_ref_deltas = default_loop_filter_ref_deltas;
899 ref_loop_filter_mode_deltas = default_loop_filter_mode_deltas;
901 ref_loop_filter_ref_deltas =
902 priv->ref[current->ref_frame_idx[current->primary_ref_frame]].loop_filter_ref_deltas;
903 ref_loop_filter_mode_deltas =
904 priv->ref[current->ref_frame_idx[current->primary_ref_frame]].loop_filter_mode_deltas;
907 flag(loop_filter_delta_update);
908 for (i = 0; i < AV1_TOTAL_REFS_PER_FRAME; i++) {
909 if (current->loop_filter_delta_update)
910 flags(update_ref_delta[i], 1, i);
912 infer(update_ref_delta[i], 0);
913 if (current->update_ref_delta[i])
914 sus(1 + 6, loop_filter_ref_deltas[i], 1, i);
916 infer(loop_filter_ref_deltas[i], ref_loop_filter_ref_deltas[i]);
918 for (i = 0; i < 2; i++) {
919 if (current->loop_filter_delta_update)
920 flags(update_mode_delta[i], 1, i);
922 infer(update_mode_delta[i], 0);
923 if (current->update_mode_delta[i])
924 sus(1 + 6, loop_filter_mode_deltas[i], 1, i);
926 infer(loop_filter_mode_deltas[i], ref_loop_filter_mode_deltas[i]);
929 for (i = 0; i < AV1_TOTAL_REFS_PER_FRAME; i++)
930 infer(loop_filter_ref_deltas[i], default_loop_filter_ref_deltas[i]);
931 for (i = 0; i < 2; i++)
932 infer(loop_filter_mode_deltas[i], default_loop_filter_mode_deltas[i]);
938 static int FUNC(cdef_params)(CodedBitstreamContext *ctx, RWContext *rw,
939 AV1RawFrameHeader *current)
941 CodedBitstreamAV1Context *priv = ctx->priv_data;
942 const AV1RawSequenceHeader *seq = priv->sequence_header;
945 if (priv->coded_lossless || current->allow_intrabc ||
947 infer(cdef_damping_minus_3, 0);
949 infer(cdef_y_pri_strength[0], 0);
950 infer(cdef_y_sec_strength[0], 0);
951 infer(cdef_uv_pri_strength[0], 0);
952 infer(cdef_uv_sec_strength[0], 0);
957 fb(2, cdef_damping_minus_3);
960 for (i = 0; i < (1 << current->cdef_bits); i++) {
961 fbs(4, cdef_y_pri_strength[i], 1, i);
962 fbs(2, cdef_y_sec_strength[i], 1, i);
964 if (priv->num_planes > 1) {
965 fbs(4, cdef_uv_pri_strength[i], 1, i);
966 fbs(2, cdef_uv_sec_strength[i], 1, i);
973 static int FUNC(lr_params)(CodedBitstreamContext *ctx, RWContext *rw,
974 AV1RawFrameHeader *current)
976 CodedBitstreamAV1Context *priv = ctx->priv_data;
977 const AV1RawSequenceHeader *seq = priv->sequence_header;
978 int uses_lr, uses_chroma_lr;
981 if (priv->all_lossless || current->allow_intrabc ||
982 !seq->enable_restoration) {
986 uses_lr = uses_chroma_lr = 0;
987 for (i = 0; i < priv->num_planes; i++) {
988 fbs(2, lr_type[i], 1, i);
990 if (current->lr_type[i] != AV1_RESTORE_NONE) {
998 if (seq->use_128x128_superblock)
999 increment(lr_unit_shift, 1, 2);
1001 increment(lr_unit_shift, 0, 2);
1003 if(seq->color_config.subsampling_x &&
1004 seq->color_config.subsampling_y && uses_chroma_lr) {
1007 infer(lr_uv_shift, 0);
1014 static int FUNC(read_tx_mode)(CodedBitstreamContext *ctx, RWContext *rw,
1015 AV1RawFrameHeader *current)
1017 CodedBitstreamAV1Context *priv = ctx->priv_data;
1020 if (priv->coded_lossless)
1023 increment(tx_mode, 1, 2);
1028 static int FUNC(frame_reference_mode)(CodedBitstreamContext *ctx, RWContext *rw,
1029 AV1RawFrameHeader *current)
1033 if (current->frame_type == AV1_FRAME_INTRA_ONLY ||
1034 current->frame_type == AV1_FRAME_KEY)
1035 infer(reference_select, 0);
1037 flag(reference_select);
1042 static int FUNC(skip_mode_params)(CodedBitstreamContext *ctx, RWContext *rw,
1043 AV1RawFrameHeader *current)
1045 CodedBitstreamAV1Context *priv = ctx->priv_data;
1046 const AV1RawSequenceHeader *seq = priv->sequence_header;
1047 int skip_mode_allowed;
1050 if (current->frame_type == AV1_FRAME_KEY ||
1051 current->frame_type == AV1_FRAME_INTRA_ONLY ||
1052 !current->reference_select || !seq->enable_order_hint) {
1053 skip_mode_allowed = 0;
1055 int forward_idx, backward_idx;
1056 int forward_hint, backward_hint;
1057 int ref_hint, dist, i;
1061 for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
1062 ref_hint = priv->ref[current->ref_frame_idx[i]].order_hint;
1063 dist = cbs_av1_get_relative_dist(seq, ref_hint,
1066 if (forward_idx < 0 ||
1067 cbs_av1_get_relative_dist(seq, ref_hint,
1068 forward_hint) > 0) {
1070 forward_hint = ref_hint;
1072 } else if (dist > 0) {
1073 if (backward_idx < 0 ||
1074 cbs_av1_get_relative_dist(seq, ref_hint,
1075 backward_hint) < 0) {
1077 backward_hint = ref_hint;
1082 if (forward_idx < 0) {
1083 skip_mode_allowed = 0;
1084 } else if (backward_idx >= 0) {
1085 skip_mode_allowed = 1;
1086 // Frames for skip mode are forward_idx and backward_idx.
1088 int second_forward_idx;
1089 int second_forward_hint;
1091 second_forward_idx = -1;
1092 for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
1093 ref_hint = priv->ref[current->ref_frame_idx[i]].order_hint;
1094 if (cbs_av1_get_relative_dist(seq, ref_hint,
1095 forward_hint) < 0) {
1096 if (second_forward_idx < 0 ||
1097 cbs_av1_get_relative_dist(seq, ref_hint,
1098 second_forward_hint) > 0) {
1099 second_forward_idx = i;
1100 second_forward_hint = ref_hint;
1105 if (second_forward_idx < 0) {
1106 skip_mode_allowed = 0;
1108 skip_mode_allowed = 1;
1109 // Frames for skip mode are forward_idx and second_forward_idx.
1114 if (skip_mode_allowed)
1115 flag(skip_mode_present);
1117 infer(skip_mode_present, 0);
1122 static int FUNC(global_motion_param)(CodedBitstreamContext *ctx, RWContext *rw,
1123 AV1RawFrameHeader *current,
1124 int type, int ref, int idx)
1126 uint32_t abs_bits, prec_bits, num_syms;
1130 if (type == AV1_WARP_MODEL_TRANSLATION) {
1131 abs_bits = AV1_GM_ABS_TRANS_ONLY_BITS - !current->allow_high_precision_mv;
1132 prec_bits = AV1_GM_TRANS_ONLY_PREC_BITS - !current->allow_high_precision_mv;
1134 abs_bits = AV1_GM_ABS_TRANS_BITS;
1135 prec_bits = AV1_GM_TRANS_PREC_BITS;
1138 abs_bits = AV1_GM_ABS_ALPHA_BITS;
1139 prec_bits = AV1_GM_ALPHA_PREC_BITS;
1142 num_syms = 2 * (1 << abs_bits) + 1;
1143 subexp(gm_params[ref][idx], num_syms, 2, ref, idx);
1145 // Actual gm_params value is not reconstructed here.
1151 static int FUNC(global_motion_params)(CodedBitstreamContext *ctx, RWContext *rw,
1152 AV1RawFrameHeader *current)
1157 if (current->frame_type == AV1_FRAME_KEY ||
1158 current->frame_type == AV1_FRAME_INTRA_ONLY)
1161 for (ref = AV1_REF_FRAME_LAST; ref <= AV1_REF_FRAME_ALTREF; ref++) {
1162 flags(is_global[ref], 1, ref);
1163 if (current->is_global[ref]) {
1164 flags(is_rot_zoom[ref], 1, ref);
1165 if (current->is_rot_zoom[ref]) {
1166 type = AV1_WARP_MODEL_ROTZOOM;
1168 flags(is_translation[ref], 1, ref);
1169 type = current->is_translation[ref] ? AV1_WARP_MODEL_TRANSLATION
1170 : AV1_WARP_MODEL_AFFINE;
1173 type = AV1_WARP_MODEL_IDENTITY;
1176 if (type >= AV1_WARP_MODEL_ROTZOOM) {
1177 CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 2));
1178 CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 3));
1179 if (type == AV1_WARP_MODEL_AFFINE) {
1180 CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 4));
1181 CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 5));
1183 // gm_params[ref][4] = -gm_params[ref][3]
1184 // gm_params[ref][5] = gm_params[ref][2]
1187 if (type >= AV1_WARP_MODEL_TRANSLATION) {
1188 CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 0));
1189 CHECK(FUNC(global_motion_param)(ctx, rw, current, type, ref, 1));
1196 static int FUNC(film_grain_params)(CodedBitstreamContext *ctx, RWContext *rw,
1197 AV1RawFilmGrainParams *current,
1198 AV1RawFrameHeader *frame_header)
1200 CodedBitstreamAV1Context *priv = ctx->priv_data;
1201 const AV1RawSequenceHeader *seq = priv->sequence_header;
1202 int num_pos_luma, num_pos_chroma;
1205 if (!seq->film_grain_params_present ||
1206 (!frame_header->show_frame && !frame_header->showable_frame))
1211 if (!current->apply_grain)
1216 if (frame_header->frame_type == AV1_FRAME_INTER)
1219 infer(update_grain, 1);
1221 if (!current->update_grain) {
1222 fb(3, film_grain_params_ref_idx);
1226 fc(4, num_y_points, 0, 14);
1227 for (i = 0; i < current->num_y_points; i++) {
1228 fcs(8, point_y_value[i],
1229 i ? current->point_y_value[i - 1] + 1 : 0,
1230 MAX_UINT_BITS(8) - (current->num_y_points - i - 1),
1232 fbs(8, point_y_scaling[i], 1, i);
1235 if (seq->color_config.mono_chrome)
1236 infer(chroma_scaling_from_luma, 0);
1238 flag(chroma_scaling_from_luma);
1240 if (seq->color_config.mono_chrome ||
1241 current->chroma_scaling_from_luma ||
1242 (seq->color_config.subsampling_x == 1 &&
1243 seq->color_config.subsampling_y == 1 &&
1244 current->num_y_points == 0)) {
1245 infer(num_cb_points, 0);
1246 infer(num_cr_points, 0);
1248 fc(4, num_cb_points, 0, 10);
1249 for (i = 0; i < current->num_cb_points; i++) {
1250 fcs(8, point_cb_value[i],
1251 i ? current->point_cb_value[i - 1] + 1 : 0,
1252 MAX_UINT_BITS(8) - (current->num_cb_points - i - 1),
1254 fbs(8, point_cb_scaling[i], 1, i);
1256 fc(4, num_cr_points, 0, 10);
1257 for (i = 0; i < current->num_cr_points; i++) {
1258 fcs(8, point_cr_value[i],
1259 i ? current->point_cr_value[i - 1] + 1 : 0,
1260 MAX_UINT_BITS(8) - (current->num_cr_points - i - 1),
1262 fbs(8, point_cr_scaling[i], 1, i);
1266 fb(2, grain_scaling_minus_8);
1267 fb(2, ar_coeff_lag);
1268 num_pos_luma = 2 * current->ar_coeff_lag * (current->ar_coeff_lag + 1);
1269 if (current->num_y_points) {
1270 num_pos_chroma = num_pos_luma + 1;
1271 for (i = 0; i < num_pos_luma; i++)
1272 fbs(8, ar_coeffs_y_plus_128[i], 1, i);
1274 num_pos_chroma = num_pos_luma;
1276 if (current->chroma_scaling_from_luma || current->num_cb_points) {
1277 for (i = 0; i < num_pos_chroma; i++)
1278 fbs(8, ar_coeffs_cb_plus_128[i], 1, i);
1280 if (current->chroma_scaling_from_luma || current->num_cr_points) {
1281 for (i = 0; i < num_pos_chroma; i++)
1282 fbs(8, ar_coeffs_cr_plus_128[i], 1, i);
1284 fb(2, ar_coeff_shift_minus_6);
1285 fb(2, grain_scale_shift);
1286 if (current->num_cb_points) {
1288 fb(8, cb_luma_mult);
1291 if (current->num_cr_points) {
1293 fb(8, cr_luma_mult);
1298 flag(clip_to_restricted_range);
1303 static int FUNC(uncompressed_header)(CodedBitstreamContext *ctx, RWContext *rw,
1304 AV1RawFrameHeader *current)
1306 CodedBitstreamAV1Context *priv = ctx->priv_data;
1307 const AV1RawSequenceHeader *seq;
1308 int id_len, diff_len, all_frames, frame_is_intra, order_hint_bits;
1311 if (!priv->sequence_header) {
1312 av_log(ctx->log_ctx, AV_LOG_ERROR, "No sequence header available: "
1313 "unable to decode frame header.\n");
1314 return AVERROR_INVALIDDATA;
1316 seq = priv->sequence_header;
1318 id_len = seq->additional_frame_id_length_minus_1 +
1319 seq->delta_frame_id_length_minus_2 + 3;
1320 all_frames = (1 << AV1_NUM_REF_FRAMES) - 1;
1322 if (seq->reduced_still_picture_header) {
1323 infer(show_existing_frame, 0);
1324 infer(frame_type, AV1_FRAME_KEY);
1325 infer(show_frame, 1);
1326 infer(showable_frame, 0);
1330 flag(show_existing_frame);
1332 if (current->show_existing_frame) {
1333 AV1ReferenceFrameState *ref;
1335 fb(3, frame_to_show_map_idx);
1336 ref = &priv->ref[current->frame_to_show_map_idx];
1339 av_log(ctx->log_ctx, AV_LOG_ERROR, "Missing reference frame needed for "
1340 "show_existing_frame (frame_to_show_map_idx = %d).\n",
1341 current->frame_to_show_map_idx);
1342 return AVERROR_INVALIDDATA;
1345 if (seq->decoder_model_info_present_flag &&
1346 !seq->timing_info.equal_picture_interval) {
1347 fb(seq->decoder_model_info.frame_presentation_time_length_minus_1 + 1,
1348 frame_presentation_time);
1351 if (seq->frame_id_numbers_present_flag)
1352 fb(id_len, display_frame_id);
1354 infer(frame_type, ref->frame_type);
1355 if (current->frame_type == AV1_FRAME_KEY) {
1356 infer(refresh_frame_flags, all_frames);
1359 infer(current_frame_id, ref->frame_id);
1360 priv->upscaled_width = ref->upscaled_width;
1361 priv->frame_width = ref->frame_width;
1362 priv->frame_height = ref->frame_height;
1363 priv->render_width = ref->render_width;
1364 priv->render_height = ref->render_height;
1365 priv->bit_depth = ref->bit_depth;
1366 priv->order_hint = ref->order_hint;
1368 infer(refresh_frame_flags, 0);
1370 infer(frame_width_minus_1, ref->upscaled_width - 1);
1371 infer(frame_height_minus_1, ref->frame_height - 1);
1372 infer(render_width_minus_1, ref->render_width - 1);
1373 infer(render_height_minus_1, ref->render_height - 1);
1380 frame_is_intra = (current->frame_type == AV1_FRAME_INTRA_ONLY ||
1381 current->frame_type == AV1_FRAME_KEY);
1384 if (current->show_frame &&
1385 seq->decoder_model_info_present_flag &&
1386 !seq->timing_info.equal_picture_interval) {
1387 fb(seq->decoder_model_info.frame_presentation_time_length_minus_1 + 1,
1388 frame_presentation_time);
1390 if (current->show_frame)
1391 infer(showable_frame, current->frame_type != AV1_FRAME_KEY);
1393 flag(showable_frame);
1395 if (current->frame_type == AV1_FRAME_SWITCH ||
1396 (current->frame_type == AV1_FRAME_KEY && current->show_frame))
1397 infer(error_resilient_mode, 1);
1399 flag(error_resilient_mode);
1402 if (current->frame_type == AV1_FRAME_KEY && current->show_frame) {
1403 for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
1404 priv->ref[i].valid = 0;
1405 priv->ref[i].order_hint = 0;
1409 flag(disable_cdf_update);
1411 if (seq->seq_force_screen_content_tools ==
1412 AV1_SELECT_SCREEN_CONTENT_TOOLS) {
1413 flag(allow_screen_content_tools);
1415 infer(allow_screen_content_tools,
1416 seq->seq_force_screen_content_tools);
1418 if (current->allow_screen_content_tools) {
1419 if (seq->seq_force_integer_mv == AV1_SELECT_INTEGER_MV)
1420 flag(force_integer_mv);
1422 infer(force_integer_mv, seq->seq_force_integer_mv);
1424 infer(force_integer_mv, 0);
1427 if (seq->frame_id_numbers_present_flag) {
1428 fb(id_len, current_frame_id);
1430 diff_len = seq->delta_frame_id_length_minus_2 + 2;
1431 for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
1432 if (current->current_frame_id > (1 << diff_len)) {
1433 if (priv->ref[i].frame_id > current->current_frame_id ||
1434 priv->ref[i].frame_id < (current->current_frame_id -
1436 priv->ref[i].valid = 0;
1438 if (priv->ref[i].frame_id > current->current_frame_id &&
1439 priv->ref[i].frame_id < ((1 << id_len) +
1440 current->current_frame_id -
1442 priv->ref[i].valid = 0;
1446 infer(current_frame_id, 0);
1449 if (current->frame_type == AV1_FRAME_SWITCH)
1450 infer(frame_size_override_flag, 1);
1451 else if(seq->reduced_still_picture_header)
1452 infer(frame_size_override_flag, 0);
1454 flag(frame_size_override_flag);
1457 seq->enable_order_hint ? seq->order_hint_bits_minus_1 + 1 : 0;
1458 if (order_hint_bits > 0)
1459 fb(order_hint_bits, order_hint);
1461 infer(order_hint, 0);
1462 priv->order_hint = current->order_hint;
1464 if (frame_is_intra || current->error_resilient_mode)
1465 infer(primary_ref_frame, AV1_PRIMARY_REF_NONE);
1467 fb(3, primary_ref_frame);
1469 if (seq->decoder_model_info_present_flag) {
1470 flag(buffer_removal_time_present_flag);
1471 if (current->buffer_removal_time_present_flag) {
1472 for (i = 0; i <= seq->operating_points_cnt_minus_1; i++) {
1473 if (seq->decoder_model_present_for_this_op[i]) {
1474 int op_pt_idc = seq->operating_point_idc[i];
1475 int in_temporal_layer = (op_pt_idc >> priv->temporal_id ) & 1;
1476 int in_spatial_layer = (op_pt_idc >> (priv->spatial_id + 8)) & 1;
1477 if (seq->operating_point_idc[i] == 0 ||
1478 (in_temporal_layer && in_spatial_layer)) {
1479 fbs(seq->decoder_model_info.buffer_removal_time_length_minus_1 + 1,
1480 buffer_removal_time[i], 1, i);
1487 if (current->frame_type == AV1_FRAME_SWITCH ||
1488 (current->frame_type == AV1_FRAME_KEY && current->show_frame))
1489 infer(refresh_frame_flags, all_frames);
1491 fb(8, refresh_frame_flags);
1493 if (!frame_is_intra || current->refresh_frame_flags != all_frames) {
1494 if (seq->enable_order_hint) {
1495 for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
1496 if (current->error_resilient_mode)
1497 fbs(order_hint_bits, ref_order_hint[i], 1, i);
1499 infer(ref_order_hint[i], priv->ref[i].order_hint);
1500 if (current->ref_order_hint[i] != priv->ref[i].order_hint)
1501 priv->ref[i].valid = 0;
1506 if (current->frame_type == AV1_FRAME_KEY ||
1507 current->frame_type == AV1_FRAME_INTRA_ONLY) {
1508 CHECK(FUNC(frame_size)(ctx, rw, current));
1509 CHECK(FUNC(render_size)(ctx, rw, current));
1511 if (current->allow_screen_content_tools &&
1512 priv->upscaled_width == priv->frame_width)
1513 flag(allow_intrabc);
1515 infer(allow_intrabc, 0);
1518 if (!seq->enable_order_hint) {
1519 infer(frame_refs_short_signaling, 0);
1521 flag(frame_refs_short_signaling);
1522 if (current->frame_refs_short_signaling) {
1523 fb(3, last_frame_idx);
1524 fb(3, golden_frame_idx);
1525 CHECK(FUNC(set_frame_refs)(ctx, rw, current));
1529 for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
1530 if (!current->frame_refs_short_signaling)
1531 fbs(3, ref_frame_idx[i], 1, i);
1532 if (seq->frame_id_numbers_present_flag) {
1533 fbs(seq->delta_frame_id_length_minus_2 + 2,
1534 delta_frame_id_minus1[i], 1, i);
1538 if (current->frame_size_override_flag &&
1539 !current->error_resilient_mode) {
1540 CHECK(FUNC(frame_size_with_refs)(ctx, rw, current));
1542 CHECK(FUNC(frame_size)(ctx, rw, current));
1543 CHECK(FUNC(render_size)(ctx, rw, current));
1546 if (current->force_integer_mv)
1547 infer(allow_high_precision_mv, 0);
1549 flag(allow_high_precision_mv);
1551 CHECK(FUNC(interpolation_filter)(ctx, rw, current));
1553 flag(is_motion_mode_switchable);
1555 if (current->error_resilient_mode ||
1556 !seq->enable_ref_frame_mvs)
1557 infer(use_ref_frame_mvs, 0);
1559 flag(use_ref_frame_mvs);
1561 infer(allow_intrabc, 0);
1564 if (!frame_is_intra) {
1565 // Derive reference frame sign biases.
1568 if (seq->reduced_still_picture_header || current->disable_cdf_update)
1569 infer(disable_frame_end_update_cdf, 1);
1571 flag(disable_frame_end_update_cdf);
1573 if (current->primary_ref_frame == AV1_PRIMARY_REF_NONE) {
1574 // Init non-coeff CDFs.
1575 // Setup past independence.
1577 // Load CDF tables from previous frame.
1578 // Load params from previous frame.
1581 if (current->use_ref_frame_mvs) {
1582 // Perform motion field estimation process.
1585 CHECK(FUNC(tile_info)(ctx, rw, current));
1587 CHECK(FUNC(quantization_params)(ctx, rw, current));
1589 CHECK(FUNC(segmentation_params)(ctx, rw, current));
1591 CHECK(FUNC(delta_q_params)(ctx, rw, current));
1593 CHECK(FUNC(delta_lf_params)(ctx, rw, current));
1595 // Init coeff CDFs / load previous segments.
1597 priv->coded_lossless = 1;
1598 for (i = 0; i < AV1_MAX_SEGMENTS; i++) {
1600 if (current->feature_enabled[i][AV1_SEG_LVL_ALT_Q]) {
1601 qindex = (current->base_q_idx +
1602 current->feature_value[i][AV1_SEG_LVL_ALT_Q]);
1604 qindex = current->base_q_idx;
1606 qindex = av_clip_uintp2(qindex, 8);
1608 if (qindex || current->delta_q_y_dc ||
1609 current->delta_q_u_ac || current->delta_q_u_dc ||
1610 current->delta_q_v_ac || current->delta_q_v_dc) {
1611 priv->coded_lossless = 0;
1614 priv->all_lossless = priv->coded_lossless &&
1615 priv->frame_width == priv->upscaled_width;
1617 CHECK(FUNC(loop_filter_params)(ctx, rw, current));
1619 CHECK(FUNC(cdef_params)(ctx, rw, current));
1621 CHECK(FUNC(lr_params)(ctx, rw, current));
1623 CHECK(FUNC(read_tx_mode)(ctx, rw, current));
1625 CHECK(FUNC(frame_reference_mode)(ctx, rw, current));
1627 CHECK(FUNC(skip_mode_params)(ctx, rw, current));
1629 if (frame_is_intra || current->error_resilient_mode ||
1630 !seq->enable_warped_motion)
1631 infer(allow_warped_motion, 0);
1633 flag(allow_warped_motion);
1635 flag(reduced_tx_set);
1637 CHECK(FUNC(global_motion_params)(ctx, rw, current));
1639 CHECK(FUNC(film_grain_params)(ctx, rw, ¤t->film_grain, current));
1641 av_log(ctx->log_ctx, AV_LOG_DEBUG, "Frame %d: size %dx%d "
1642 "upscaled %d render %dx%d subsample %dx%d "
1643 "bitdepth %d tiles %dx%d.\n", priv->order_hint,
1644 priv->frame_width, priv->frame_height, priv->upscaled_width,
1645 priv->render_width, priv->render_height,
1646 seq->color_config.subsampling_x + 1,
1647 seq->color_config.subsampling_y + 1, priv->bit_depth,
1648 priv->tile_rows, priv->tile_cols);
1651 for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
1652 if (current->refresh_frame_flags & (1 << i)) {
1653 priv->ref[i] = (AV1ReferenceFrameState) {
1655 .frame_id = current->current_frame_id,
1656 .upscaled_width = priv->upscaled_width,
1657 .frame_width = priv->frame_width,
1658 .frame_height = priv->frame_height,
1659 .render_width = priv->render_width,
1660 .render_height = priv->render_height,
1661 .frame_type = current->frame_type,
1662 .subsampling_x = seq->color_config.subsampling_x,
1663 .subsampling_y = seq->color_config.subsampling_y,
1664 .bit_depth = priv->bit_depth,
1665 .order_hint = priv->order_hint,
1667 memcpy(priv->ref[i].loop_filter_ref_deltas, current->loop_filter_ref_deltas,
1668 sizeof(current->loop_filter_ref_deltas));
1669 memcpy(priv->ref[i].loop_filter_mode_deltas, current->loop_filter_mode_deltas,
1670 sizeof(current->loop_filter_mode_deltas));
1671 memcpy(priv->ref[i].feature_enabled, current->feature_enabled,
1672 sizeof(current->feature_enabled));
1673 memcpy(priv->ref[i].feature_value, current->feature_value,
1674 sizeof(current->feature_value));
1681 static int FUNC(frame_header_obu)(CodedBitstreamContext *ctx, RWContext *rw,
1682 AV1RawFrameHeader *current, int redundant,
1683 AVBufferRef *rw_buffer_ref)
1685 CodedBitstreamAV1Context *priv = ctx->priv_data;
1686 int start_pos, fh_bits, fh_bytes, err;
1689 if (priv->seen_frame_header) {
1691 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid repeated "
1692 "frame header OBU.\n");
1693 return AVERROR_INVALIDDATA;
1699 HEADER("Redundant Frame Header");
1701 av_assert0(priv->frame_header_ref && priv->frame_header);
1703 init_get_bits(&fh, priv->frame_header,
1704 priv->frame_header_size);
1705 for (i = 0; i < priv->frame_header_size; i += 8) {
1706 b = FFMIN(priv->frame_header_size - i, 8);
1707 val = get_bits(&fh, b);
1708 xf(b, frame_header_copy[i],
1709 val, val, val, 1, i / 8);
1714 HEADER("Redundant Frame Header (used as Frame Header)");
1716 HEADER("Frame Header");
1719 start_pos = get_bits_count(rw);
1721 start_pos = put_bits_count(rw);
1724 CHECK(FUNC(uncompressed_header)(ctx, rw, current));
1728 if (current->show_existing_frame) {
1729 priv->seen_frame_header = 0;
1731 priv->seen_frame_header = 1;
1733 av_buffer_unref(&priv->frame_header_ref);
1736 fh_bits = get_bits_count(rw) - start_pos;
1737 fh_start = (uint8_t*)rw->buffer + start_pos / 8;
1739 // Need to flush the bitwriter so that we can copy its output,
1740 // but use a copy so we don't affect the caller's structure.
1742 PutBitContext tmp = *rw;
1743 flush_put_bits(&tmp);
1746 fh_bits = put_bits_count(rw) - start_pos;
1747 fh_start = rw->buf + start_pos / 8;
1749 fh_bytes = (fh_bits + 7) / 8;
1751 priv->frame_header_size = fh_bits;
1753 if (rw_buffer_ref) {
1754 priv->frame_header_ref = av_buffer_ref(rw_buffer_ref);
1755 if (!priv->frame_header_ref)
1756 return AVERROR(ENOMEM);
1757 priv->frame_header = fh_start;
1759 priv->frame_header_ref =
1760 av_buffer_alloc(fh_bytes + AV_INPUT_BUFFER_PADDING_SIZE);
1761 if (!priv->frame_header_ref)
1762 return AVERROR(ENOMEM);
1763 priv->frame_header = priv->frame_header_ref->data;
1764 memcpy(priv->frame_header, fh_start, fh_bytes);
1772 static int FUNC(tile_group_obu)(CodedBitstreamContext *ctx, RWContext *rw,
1773 AV1RawTileGroup *current)
1775 CodedBitstreamAV1Context *priv = ctx->priv_data;
1776 int num_tiles, tile_bits;
1779 HEADER("Tile Group");
1781 num_tiles = priv->tile_cols * priv->tile_rows;
1783 flag(tile_start_and_end_present_flag);
1785 infer(tile_start_and_end_present_flag, 0);
1787 if (num_tiles == 1 || !current->tile_start_and_end_present_flag) {
1789 infer(tg_end, num_tiles - 1);
1791 tile_bits = cbs_av1_tile_log2(1, priv->tile_cols) +
1792 cbs_av1_tile_log2(1, priv->tile_rows);
1793 fc(tile_bits, tg_start, priv->tile_num, num_tiles - 1);
1794 fc(tile_bits, tg_end, current->tg_start, num_tiles - 1);
1797 priv->tile_num = current->tg_end + 1;
1799 CHECK(FUNC(byte_alignment)(ctx, rw));
1801 // Reset header for next frame.
1802 if (current->tg_end == num_tiles - 1)
1803 priv->seen_frame_header = 0;
1805 // Tile data follows.
1810 static int FUNC(frame_obu)(CodedBitstreamContext *ctx, RWContext *rw,
1811 AV1RawFrame *current,
1812 AVBufferRef *rw_buffer_ref)
1816 CHECK(FUNC(frame_header_obu)(ctx, rw, ¤t->header,
1819 CHECK(FUNC(byte_alignment)(ctx, rw));
1821 CHECK(FUNC(tile_group_obu)(ctx, rw, ¤t->tile_group));
1826 static int FUNC(tile_list_obu)(CodedBitstreamContext *ctx, RWContext *rw,
1827 AV1RawTileList *current)
1831 fb(8, output_frame_width_in_tiles_minus_1);
1832 fb(8, output_frame_height_in_tiles_minus_1);
1834 fb(16, tile_count_minus_1);
1836 // Tile data follows.
1841 static int FUNC(metadata_hdr_cll)(CodedBitstreamContext *ctx, RWContext *rw,
1842 AV1RawMetadataHDRCLL *current)
1852 static int FUNC(metadata_hdr_mdcv)(CodedBitstreamContext *ctx, RWContext *rw,
1853 AV1RawMetadataHDRMDCV *current)
1857 for (i = 0; i < 3; i++) {
1858 fbs(16, primary_chromaticity_x[i], 1, i);
1859 fbs(16, primary_chromaticity_y[i], 1, i);
1862 fb(16, white_point_chromaticity_x);
1863 fb(16, white_point_chromaticity_y);
1865 fc(32, luminance_max, 1, MAX_UINT_BITS(32));
1866 // luminance_min must be lower than luminance_max. Convert luminance_max from
1867 // 24.8 fixed point to 18.14 fixed point in order to compare them.
1868 fc(32, luminance_min, 0, FFMIN(((uint64_t)current->luminance_max << 6) - 1,
1869 MAX_UINT_BITS(32)));
1874 static int FUNC(scalability_structure)(CodedBitstreamContext *ctx, RWContext *rw,
1875 AV1RawMetadataScalability *current)
1877 CodedBitstreamAV1Context *priv = ctx->priv_data;
1878 const AV1RawSequenceHeader *seq;
1881 if (!priv->sequence_header) {
1882 av_log(ctx->log_ctx, AV_LOG_ERROR, "No sequence header available: "
1883 "unable to parse scalability metadata.\n");
1884 return AVERROR_INVALIDDATA;
1886 seq = priv->sequence_header;
1888 fb(2, spatial_layers_cnt_minus_1);
1889 flag(spatial_layer_dimensions_present_flag);
1890 flag(spatial_layer_description_present_flag);
1891 flag(temporal_group_description_present_flag);
1892 fc(3, scalability_structure_reserved_3bits, 0, 0);
1893 if (current->spatial_layer_dimensions_present_flag) {
1894 for (i = 0; i <= current->spatial_layers_cnt_minus_1; i++) {
1895 fcs(16, spatial_layer_max_width[i],
1896 0, seq->max_frame_width_minus_1 + 1, 1, i);
1897 fcs(16, spatial_layer_max_height[i],
1898 0, seq->max_frame_height_minus_1 + 1, 1, i);
1901 if (current->spatial_layer_description_present_flag) {
1902 for (i = 0; i <= current->spatial_layers_cnt_minus_1; i++)
1903 fbs(8, spatial_layer_ref_id[i], 1, i);
1905 if (current->temporal_group_description_present_flag) {
1906 fb(8, temporal_group_size);
1907 for (i = 0; i < current->temporal_group_size; i++) {
1908 fbs(3, temporal_group_temporal_id[i], 1, i);
1909 flags(temporal_group_temporal_switching_up_point_flag[i], 1, i);
1910 flags(temporal_group_spatial_switching_up_point_flag[i], 1, i);
1911 fbs(3, temporal_group_ref_cnt[i], 1, i);
1912 for (j = 0; j < current->temporal_group_ref_cnt[i]; j++) {
1913 fbs(8, temporal_group_ref_pic_diff[i][j], 2, i, j);
1921 static int FUNC(metadata_scalability)(CodedBitstreamContext *ctx, RWContext *rw,
1922 AV1RawMetadataScalability *current)
1926 fb(8, scalability_mode_idc);
1928 if (current->scalability_mode_idc == AV1_SCALABILITY_SS)
1929 CHECK(FUNC(scalability_structure)(ctx, rw, current));
1934 static int FUNC(metadata_itut_t35)(CodedBitstreamContext *ctx, RWContext *rw,
1935 AV1RawMetadataITUTT35 *current)
1940 fb(8, itu_t_t35_country_code);
1941 if (current->itu_t_t35_country_code == 0xff)
1942 fb(8, itu_t_t35_country_code_extension_byte);
1945 // The payload runs up to the start of the trailing bits, but there might
1946 // be arbitrarily many trailing zeroes so we need to read through twice.
1947 current->payload_size = cbs_av1_get_payload_bytes_left(rw);
1949 current->payload_ref = av_buffer_alloc(current->payload_size);
1950 if (!current->payload_ref)
1951 return AVERROR(ENOMEM);
1952 current->payload = current->payload_ref->data;
1955 for (i = 0; i < current->payload_size; i++)
1956 xf(8, itu_t_t35_payload_bytes[i], current->payload[i],
1962 static int FUNC(metadata_timecode)(CodedBitstreamContext *ctx, RWContext *rw,
1963 AV1RawMetadataTimecode *current)
1967 fb(5, counting_type);
1968 flag(full_timestamp_flag);
1969 flag(discontinuity_flag);
1970 flag(cnt_dropped_flag);
1973 if (current->full_timestamp_flag) {
1974 fc(6, seconds_value, 0, 59);
1975 fc(6, minutes_value, 0, 59);
1976 fc(5, hours_value, 0, 23);
1979 if (current->seconds_flag) {
1980 fc(6, seconds_value, 0, 59);
1982 if (current->minutes_flag) {
1983 fc(6, minutes_value, 0, 59);
1985 if (current->hours_flag)
1986 fc(5, hours_value, 0, 23);
1991 fb(5, time_offset_length);
1992 if (current->time_offset_length > 0)
1993 fb(current->time_offset_length, time_offset_value);
1995 infer(time_offset_length, 0);
2000 static int FUNC(metadata_obu)(CodedBitstreamContext *ctx, RWContext *rw,
2001 AV1RawMetadata *current)
2005 leb128(metadata_type);
2007 switch (current->metadata_type) {
2008 case AV1_METADATA_TYPE_HDR_CLL:
2009 CHECK(FUNC(metadata_hdr_cll)(ctx, rw, ¤t->metadata.hdr_cll));
2011 case AV1_METADATA_TYPE_HDR_MDCV:
2012 CHECK(FUNC(metadata_hdr_mdcv)(ctx, rw, ¤t->metadata.hdr_mdcv));
2014 case AV1_METADATA_TYPE_SCALABILITY:
2015 CHECK(FUNC(metadata_scalability)(ctx, rw, ¤t->metadata.scalability));
2017 case AV1_METADATA_TYPE_ITUT_T35:
2018 CHECK(FUNC(metadata_itut_t35)(ctx, rw, ¤t->metadata.itut_t35));
2020 case AV1_METADATA_TYPE_TIMECODE:
2021 CHECK(FUNC(metadata_timecode)(ctx, rw, ¤t->metadata.timecode));
2024 // Unknown metadata type.
2025 return AVERROR_PATCHWELCOME;
2031 static int FUNC(padding_obu)(CodedBitstreamContext *ctx, RWContext *rw,
2032 AV1RawPadding *current)
2039 // The payload runs up to the start of the trailing bits, but there might
2040 // be arbitrarily many trailing zeroes so we need to read through twice.
2041 current->payload_size = cbs_av1_get_payload_bytes_left(rw);
2043 current->payload_ref = av_buffer_alloc(current->payload_size);
2044 if (!current->payload_ref)
2045 return AVERROR(ENOMEM);
2046 current->payload = current->payload_ref->data;
2049 for (i = 0; i < current->payload_size; i++)
2050 xf(8, obu_padding_byte[i], current->payload[i], 0x00, 0xff, 1, i);