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(rbsp_trailing_bits)(CodedBitstreamContext *ctx, RWContext *rw)
23 fixed(1, rbsp_stop_one_bit, 1);
24 while (byte_alignment(rw) != 0)
25 fixed(1, rbsp_alignment_zero_bit, 0);
30 static int FUNC(nal_unit_header)(CodedBitstreamContext *ctx, RWContext *rw,
31 H264RawNALUnitHeader *current,
32 uint32_t valid_type_mask)
36 u(1, forbidden_zero_bit, 0, 0);
37 u(2, nal_ref_idc, 0, 3);
38 u(5, nal_unit_type, 0, 31);
40 if (!(1 << current->nal_unit_type & valid_type_mask)) {
41 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid NAL unit type %d.\n",
42 current->nal_unit_type);
43 return AVERROR_INVALIDDATA;
46 if (current->nal_unit_type == 14 ||
47 current->nal_unit_type == 20 ||
48 current->nal_unit_type == 21) {
49 if (current->nal_unit_type != 21)
50 flag(svc_extension_flag);
52 flag(avc_3d_extension_flag);
54 if (current->svc_extension_flag) {
55 av_log(ctx->log_ctx, AV_LOG_ERROR, "SVC not supported.\n");
56 return AVERROR_PATCHWELCOME;
58 } else if (current->avc_3d_extension_flag) {
59 av_log(ctx->log_ctx, AV_LOG_ERROR, "3DAVC not supported.\n");
60 return AVERROR_PATCHWELCOME;
63 av_log(ctx->log_ctx, AV_LOG_ERROR, "MVC not supported.\n");
64 return AVERROR_PATCHWELCOME;
71 static int FUNC(scaling_list)(CodedBitstreamContext *ctx, RWContext *rw,
72 H264RawScalingList *current,
73 int size_of_scaling_list)
78 for (i = 0; i < size_of_scaling_list; i++) {
79 xse(delta_scale, current->delta_scale[i], -128, +127);
80 scale = (scale + current->delta_scale[i] + 256) % 256;
88 static int FUNC(hrd_parameters)(CodedBitstreamContext *ctx, RWContext *rw,
93 ue(cpb_cnt_minus1, 0, 31);
94 u(4, bit_rate_scale, 0, 15);
95 u(4, cpb_size_scale, 0, 15);
97 for (i = 0; i <= current->cpb_cnt_minus1; i++) {
98 ue(bit_rate_value_minus1[i], 0, UINT32_MAX - 1);
99 ue(cpb_size_value_minus1[i], 0, UINT32_MAX - 1);
103 u(5, initial_cpb_removal_delay_length_minus1, 0, 31);
104 u(5, cpb_removal_delay_length_minus1, 0, 31);
105 u(5, dpb_output_delay_length_minus1, 0, 31);
106 u(5, time_offset_length, 0, 31);
111 static int FUNC(vui_parameters)(CodedBitstreamContext *ctx, RWContext *rw,
112 H264RawVUI *current, H264RawSPS *sps)
116 flag(aspect_ratio_info_present_flag);
117 if (current->aspect_ratio_info_present_flag) {
118 u(8, aspect_ratio_idc, 0, 255);
119 if (current->aspect_ratio_idc == 255) {
120 u(16, sar_width, 0, 65535);
121 u(16, sar_height, 0, 65535);
124 infer(aspect_ratio_idc, 0);
127 flag(overscan_info_present_flag);
128 if (current->overscan_info_present_flag)
129 flag(overscan_appropriate_flag);
131 flag(video_signal_type_present_flag);
132 if (current->video_signal_type_present_flag) {
133 u(3, video_format, 0, 7);
134 flag(video_full_range_flag);
135 flag(colour_description_present_flag);
136 if (current->colour_description_present_flag) {
137 u(8, colour_primaries, 0, 255);
138 u(8, transfer_characteristics, 0, 255);
139 u(8, matrix_coefficients, 0, 255);
142 infer(video_format, 5);
143 infer(video_full_range_flag, 0);
144 infer(colour_primaries, 2);
145 infer(transfer_characteristics, 2);
146 infer(matrix_coefficients, 2);
149 flag(chroma_loc_info_present_flag);
150 if (current->chroma_loc_info_present_flag) {
151 ue(chroma_sample_loc_type_top_field, 0, 5);
152 ue(chroma_sample_loc_type_bottom_field, 0, 5);
154 infer(chroma_sample_loc_type_top_field, 0);
155 infer(chroma_sample_loc_type_bottom_field, 0);
158 flag(timing_info_present_flag);
159 if (current->timing_info_present_flag) {
160 u(32, num_units_in_tick, 1, UINT32_MAX);
161 u(32, time_scale, 1, UINT32_MAX);
162 flag(fixed_frame_rate_flag);
164 infer(fixed_frame_rate_flag, 0);
167 flag(nal_hrd_parameters_present_flag);
168 if (current->nal_hrd_parameters_present_flag)
169 CHECK(FUNC(hrd_parameters)(ctx, rw, ¤t->nal_hrd_parameters));
171 flag(vcl_hrd_parameters_present_flag);
172 if (current->vcl_hrd_parameters_present_flag)
173 CHECK(FUNC(hrd_parameters)(ctx, rw, ¤t->vcl_hrd_parameters));
175 if (current->nal_hrd_parameters_present_flag ||
176 current->vcl_hrd_parameters_present_flag)
177 flag(low_delay_hrd_flag);
179 infer(low_delay_hrd_flag, 1 - current->fixed_frame_rate_flag);
181 flag(pic_struct_present_flag);
183 flag(bitstream_restriction_flag);
184 if (current->bitstream_restriction_flag) {
185 flag(motion_vectors_over_pic_boundaries_flag);
186 ue(max_bytes_per_pic_denom, 0, 16);
187 ue(max_bits_per_mb_denom, 0, 16);
188 ue(log2_max_mv_length_horizontal, 0, 16);
189 ue(log2_max_mv_length_vertical, 0, 16);
190 ue(max_num_reorder_frames, 0, H264_MAX_DPB_FRAMES);
191 ue(max_dec_frame_buffering, 0, H264_MAX_DPB_FRAMES);
193 infer(motion_vectors_over_pic_boundaries_flag, 1);
194 infer(max_bytes_per_pic_denom, 2);
195 infer(max_bits_per_mb_denom, 1);
196 infer(log2_max_mv_length_horizontal, 16);
197 infer(log2_max_mv_length_vertical, 16);
199 if ((sps->profile_idc == 44 || sps->profile_idc == 86 ||
200 sps->profile_idc == 110 || sps->profile_idc == 110 ||
201 sps->profile_idc == 122 || sps->profile_idc == 244) &&
202 sps->constraint_set3_flag) {
203 infer(max_num_reorder_frames, 0);
204 infer(max_dec_frame_buffering, 0);
206 infer(max_num_reorder_frames, H264_MAX_DPB_FRAMES);
207 infer(max_dec_frame_buffering, H264_MAX_DPB_FRAMES);
214 static int FUNC(sps)(CodedBitstreamContext *ctx, RWContext *rw,
219 HEADER("Sequence Parameter Set");
221 CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
224 u(8, profile_idc, 0, 255);
226 flag(constraint_set0_flag);
227 flag(constraint_set1_flag);
228 flag(constraint_set2_flag);
229 flag(constraint_set3_flag);
230 flag(constraint_set4_flag);
231 flag(constraint_set5_flag);
233 u(2, reserved_zero_2bits, 0, 0);
235 u(8, level_idc, 0, 255);
237 ue(seq_parameter_set_id, 0, 31);
239 if (current->profile_idc == 100 || current->profile_idc == 110 ||
240 current->profile_idc == 122 || current->profile_idc == 244 ||
241 current->profile_idc == 44 || current->profile_idc == 83 ||
242 current->profile_idc == 86 || current->profile_idc == 118 ||
243 current->profile_idc == 128 || current->profile_idc == 138) {
244 ue(chroma_format_idc, 0, 3);
246 if (current->chroma_format_idc == 3)
247 flag(separate_colour_plane_flag);
249 infer(separate_colour_plane_flag, 0);
251 ue(bit_depth_luma_minus8, 0, 6);
252 ue(bit_depth_chroma_minus8, 0, 6);
254 flag(qpprime_y_zero_transform_bypass_flag);
256 flag(seq_scaling_matrix_present_flag);
257 if (current->seq_scaling_matrix_present_flag) {
258 for (i = 0; i < ((current->chroma_format_idc != 3) ? 8 : 12); i++) {
259 flag(seq_scaling_list_present_flag[i]);
260 if (current->seq_scaling_list_present_flag[i]) {
262 CHECK(FUNC(scaling_list)(ctx, rw,
263 ¤t->scaling_list_4x4[i],
266 CHECK(FUNC(scaling_list)(ctx, rw,
267 ¤t->scaling_list_8x8[i - 6],
273 infer(chroma_format_idc, current->profile_idc == 183 ? 0 : 1);
275 infer(separate_colour_plane_flag, 0);
276 infer(bit_depth_luma_minus8, 0);
277 infer(bit_depth_chroma_minus8, 0);
280 ue(log2_max_frame_num_minus4, 0, 12);
281 ue(pic_order_cnt_type, 0, 2);
283 if (current->pic_order_cnt_type == 0) {
284 ue(log2_max_pic_order_cnt_lsb_minus4, 0, 12);
285 } else if (current->pic_order_cnt_type == 1) {
286 flag(delta_pic_order_always_zero_flag);
287 se(offset_for_non_ref_pic, INT32_MIN + 1, INT32_MAX);
288 se(offset_for_top_to_bottom_field, INT32_MIN + 1, INT32_MAX);
289 ue(num_ref_frames_in_pic_order_cnt_cycle, 0, 255);
291 for (i = 0; i < current->num_ref_frames_in_pic_order_cnt_cycle; i++)
292 se(offset_for_ref_frame[i], INT32_MIN + 1, INT32_MAX);
295 ue(max_num_ref_frames, 0, H264_MAX_DPB_FRAMES);
296 flag(gaps_in_frame_num_allowed_flag);
298 ue(pic_width_in_mbs_minus1, 0, H264_MAX_MB_WIDTH);
299 ue(pic_height_in_map_units_minus1, 0, H264_MAX_MB_HEIGHT);
301 flag(frame_mbs_only_flag);
302 if (!current->frame_mbs_only_flag)
303 flag(mb_adaptive_frame_field_flag);
305 flag(direct_8x8_inference_flag);
307 flag(frame_cropping_flag);
308 if (current->frame_cropping_flag) {
309 ue(frame_crop_left_offset, 0, H264_MAX_WIDTH);
310 ue(frame_crop_right_offset, 0, H264_MAX_WIDTH);
311 ue(frame_crop_top_offset, 0, H264_MAX_HEIGHT);
312 ue(frame_crop_bottom_offset, 0, H264_MAX_HEIGHT);
315 flag(vui_parameters_present_flag);
316 if (current->vui_parameters_present_flag)
317 CHECK(FUNC(vui_parameters)(ctx, rw, ¤t->vui, current));
319 CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
324 static int FUNC(sps_extension)(CodedBitstreamContext *ctx, RWContext *rw,
325 H264RawSPSExtension *current)
329 HEADER("Sequence Parameter Set Extension");
331 CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
332 1 << H264_NAL_SPS_EXT));
334 ue(seq_parameter_set_id, 0, 31);
336 ue(aux_format_idc, 0, 3);
338 if (current->aux_format_idc != 0) {
341 ue(bit_depth_aux_minus8, 0, 4);
342 flag(alpha_incr_flag);
344 bits = current->bit_depth_aux_minus8 + 9;
345 u(bits, alpha_opaque_value, 0, MAX_UINT_BITS(bits));
346 u(bits, alpha_transparent_value, 0, MAX_UINT_BITS(bits));
349 flag(additional_extension_flag);
351 CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
356 static int FUNC(pps)(CodedBitstreamContext *ctx, RWContext *rw,
359 CodedBitstreamH264Context *h264 = ctx->priv_data;
360 const H264RawSPS *sps;
363 HEADER("Picture Parameter Set");
365 CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
368 ue(pic_parameter_set_id, 0, 255);
369 ue(seq_parameter_set_id, 0, 31);
371 sps = h264->sps[current->seq_parameter_set_id];
373 av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
374 current->seq_parameter_set_id);
375 return AVERROR_INVALIDDATA;
378 flag(entropy_coding_mode_flag);
379 flag(bottom_field_pic_order_in_frame_present_flag);
381 ue(num_slice_groups_minus1, 0, 7);
382 if (current->num_slice_groups_minus1 > 0) {
383 unsigned int pic_size;
386 pic_size = (sps->pic_width_in_mbs_minus1 + 1) *
387 (sps->pic_height_in_map_units_minus1 + 1);
389 ue(slice_group_map_type, 0, 6);
391 if (current->slice_group_map_type == 0) {
392 for (iGroup = 0; iGroup <= current->num_slice_groups_minus1; iGroup++)
393 ue(run_length_minus1[iGroup], 0, pic_size - 1);
395 } else if (current->slice_group_map_type == 2) {
396 for (iGroup = 0; iGroup < current->num_slice_groups_minus1; iGroup++) {
397 ue(top_left[iGroup], 0, pic_size - 1);
398 ue(bottom_right[iGroup], current->top_left[iGroup], pic_size - 1);
400 } else if (current->slice_group_map_type == 3 ||
401 current->slice_group_map_type == 4 ||
402 current->slice_group_map_type == 5) {
403 flag(slice_group_change_direction_flag);
404 ue(slice_group_change_rate_minus1, 0, pic_size - 1);
405 } else if (current->slice_group_map_type == 6) {
406 ue(pic_size_in_map_units_minus1, pic_size - 1, pic_size - 1);
408 allocate(current->slice_group_id,
409 current->pic_size_in_map_units_minus1 + 1);
410 for (i = 0; i <= current->pic_size_in_map_units_minus1; i++)
411 u(av_log2(2 * current->num_slice_groups_minus1 + 1),
412 slice_group_id[i], 0, current->num_slice_groups_minus1);
416 ue(num_ref_idx_l0_default_active_minus1, 0, 31);
417 ue(num_ref_idx_l1_default_active_minus1, 0, 31);
419 flag(weighted_pred_flag);
420 u(2, weighted_bipred_idc, 0, 2);
422 se(pic_init_qp_minus26, -26 - 6 * sps->bit_depth_luma_minus8, +25);
423 se(pic_init_qs_minus26, -26, +25);
424 se(chroma_qp_index_offset, -12, +12);
426 flag(deblocking_filter_control_present_flag);
427 flag(constrained_intra_pred_flag);
428 flag(redundant_pic_cnt_present_flag);
430 if (more_rbsp_data(current->more_rbsp_data))
432 flag(transform_8x8_mode_flag);
434 flag(pic_scaling_matrix_present_flag);
435 if (current->pic_scaling_matrix_present_flag) {
436 for (i = 0; i < 6 + (((sps->chroma_format_idc != 3) ? 2 : 6) *
437 current->transform_8x8_mode_flag); i++) {
438 flag(pic_scaling_list_present_flag[i]);
439 if (current->pic_scaling_list_present_flag[i]) {
441 CHECK(FUNC(scaling_list)(ctx, rw,
442 ¤t->scaling_list_4x4[i],
445 CHECK(FUNC(scaling_list)(ctx, rw,
446 ¤t->scaling_list_8x8[i - 6],
452 se(second_chroma_qp_index_offset, -12, +12);
454 infer(transform_8x8_mode_flag, 0);
455 infer(pic_scaling_matrix_present_flag, 0);
456 infer(second_chroma_qp_index_offset, current->chroma_qp_index_offset);
459 CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
464 static int FUNC(sei_buffering_period)(CodedBitstreamContext *ctx, RWContext *rw,
465 H264RawSEIBufferingPeriod *current)
467 CodedBitstreamH264Context *h264 = ctx->priv_data;
468 const H264RawSPS *sps;
471 ue(seq_parameter_set_id, 0, 31);
473 sps = h264->sps[current->seq_parameter_set_id];
475 av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
476 current->seq_parameter_set_id);
477 return AVERROR_INVALIDDATA;
479 h264->active_sps = sps;
481 if (sps->vui.nal_hrd_parameters_present_flag) {
482 for (i = 0; i <= sps->vui.nal_hrd_parameters.cpb_cnt_minus1; i++) {
483 length = sps->vui.nal_hrd_parameters.initial_cpb_removal_delay_length_minus1 + 1;
484 xu(length, initial_cpb_removal_delay[SchedSelIdx],
485 current->nal.initial_cpb_removal_delay[i],
486 1, MAX_UINT_BITS(length));
487 xu(length, initial_cpb_removal_delay_offset[SchedSelIdx],
488 current->nal.initial_cpb_removal_delay_offset[i],
489 0, MAX_UINT_BITS(length));
493 if (sps->vui.vcl_hrd_parameters_present_flag) {
494 for (i = 0; i <= sps->vui.vcl_hrd_parameters.cpb_cnt_minus1; i++) {
495 length = sps->vui.vcl_hrd_parameters.initial_cpb_removal_delay_length_minus1 + 1;
496 xu(length, initial_cpb_removal_delay[SchedSelIdx],
497 current->vcl.initial_cpb_removal_delay[i],
498 1, MAX_UINT_BITS(length));
499 xu(length, initial_cpb_removal_delay_offset[SchedSelIdx],
500 current->vcl.initial_cpb_removal_delay_offset[i],
501 0, MAX_UINT_BITS(length));
508 static int FUNC(sei_pic_timestamp)(CodedBitstreamContext *ctx, RWContext *rw,
509 H264RawSEIPicTimestamp *current)
511 CodedBitstreamH264Context *h264 = ctx->priv_data;
512 const H264RawSPS *sps;
513 uint8_t time_offset_length;
517 flag(nuit_field_based_flag);
518 u(5, counting_type, 0, 6);
519 flag(full_timestamp_flag);
520 flag(discontinuity_flag);
521 flag(cnt_dropped_flag);
522 u(8, n_frames, 0, 255);
523 if (current->full_timestamp_flag) {
524 u(6, seconds_value, 0, 59);
525 u(6, minutes_value, 0, 59);
526 u(5, hours_value, 0, 23);
529 if (current->seconds_flag) {
530 u(6, seconds_value, 0, 59);
532 if (current->minutes_flag) {
533 u(6, minutes_value, 0, 59);
535 if (current->hours_flag)
536 u(5, hours_value, 0, 23);
541 sps = h264->active_sps;
542 if (sps->vui.nal_hrd_parameters_present_flag)
543 time_offset_length = sps->vui.nal_hrd_parameters.time_offset_length;
544 else if (sps->vui.vcl_hrd_parameters_present_flag)
545 time_offset_length = sps->vui.vcl_hrd_parameters.time_offset_length;
547 time_offset_length = 24;
549 if (time_offset_length > 0)
550 u(time_offset_length, time_offset,
551 0, MAX_UINT_BITS(time_offset_length));
553 infer(time_offset, 0);
558 static int FUNC(sei_pic_timing)(CodedBitstreamContext *ctx, RWContext *rw,
559 H264RawSEIPicTiming *current)
561 CodedBitstreamH264Context *h264 = ctx->priv_data;
562 const H264RawSPS *sps;
565 sps = h264->active_sps;
567 // If there is exactly one possible SPS but it is not yet active
568 // then just assume that it should be the active one.
570 for (i = 0; i < H264_MAX_SPS_COUNT; i++) {
583 av_log(ctx->log_ctx, AV_LOG_ERROR,
584 "No active SPS for pic_timing.\n");
585 return AVERROR_INVALIDDATA;
588 if (sps->vui.nal_hrd_parameters_present_flag ||
589 sps->vui.vcl_hrd_parameters_present_flag) {
590 const H264RawHRD *hrd;
592 if (sps->vui.nal_hrd_parameters_present_flag)
593 hrd = &sps->vui.nal_hrd_parameters;
594 else if (sps->vui.vcl_hrd_parameters_present_flag)
595 hrd = &sps->vui.vcl_hrd_parameters;
597 av_log(ctx->log_ctx, AV_LOG_ERROR,
598 "No HRD parameters for pic_timing.\n");
599 return AVERROR_INVALIDDATA;
602 u(hrd->cpb_removal_delay_length_minus1 + 1, cpb_removal_delay,
603 0, MAX_UINT_BITS(hrd->cpb_removal_delay_length_minus1 + 1));
604 u(hrd->dpb_output_delay_length_minus1 + 1, dpb_output_delay,
605 0, MAX_UINT_BITS(hrd->dpb_output_delay_length_minus1 + 1));
608 if (sps->vui.pic_struct_present_flag) {
609 static const int num_clock_ts[9] = {
610 1, 1, 1, 2, 2, 3, 3, 2, 3
614 u(4, pic_struct, 0, 8);
615 if (current->pic_struct > 8)
616 return AVERROR_INVALIDDATA;
618 for (i = 0; i < num_clock_ts[current->pic_struct]; i++) {
619 flag(clock_timestamp_flag[i]);
620 if (current->clock_timestamp_flag[i])
621 CHECK(FUNC(sei_pic_timestamp)(ctx, rw, ¤t->timestamp[i]));
628 static int FUNC(sei_user_data_registered)(CodedBitstreamContext *ctx, RWContext *rw,
629 H264RawSEIUserDataRegistered *current,
630 uint32_t *payload_size)
634 u(8, itu_t_t35_country_code, 0x00, 0xff);
635 if (current->itu_t_t35_country_code != 0xff)
638 u(8, itu_t_t35_country_code_extension_byte, 0x00, 0xff);
643 if (*payload_size < i) {
644 av_log(ctx->log_ctx, AV_LOG_ERROR,
645 "Invalid SEI user data registered payload.\n");
646 return AVERROR_INVALIDDATA;
648 current->data_length = *payload_size - i;
650 *payload_size = i + current->data_length;
653 allocate(current->data, current->data_length);
654 for (j = 0; j < current->data_length; j++)
655 xu(8, itu_t_t35_payload_byte, current->data[j], 0x00, 0xff);
660 static int FUNC(sei_user_data_unregistered)(CodedBitstreamContext *ctx, RWContext *rw,
661 H264RawSEIUserDataUnregistered *current,
662 uint32_t *payload_size)
667 if (*payload_size < 16) {
668 av_log(ctx->log_ctx, AV_LOG_ERROR,
669 "Invalid SEI user data unregistered payload.\n");
670 return AVERROR_INVALIDDATA;
672 current->data_length = *payload_size - 16;
674 *payload_size = 16 + current->data_length;
677 for (i = 0; i < 16; i++) {
678 xu(8, uuid_iso_iec_11578,
679 current->uuid_iso_iec_11578[i], 0x00, 0xff);
682 allocate(current->data, current->data_length);
684 for (i = 0; i < current->data_length; i++)
685 xu(8, user_data_payload_byte, current->data[i], 0x00, 0xff);
690 static int FUNC(sei_recovery_point)(CodedBitstreamContext *ctx, RWContext *rw,
691 H264RawSEIRecoveryPoint *current)
695 ue(recovery_frame_cnt, 0, 65535);
696 flag(exact_match_flag);
697 flag(broken_link_flag);
698 u(2, changing_slice_group_idc, 0, 2);
703 static int FUNC(sei_display_orientation)(CodedBitstreamContext *ctx, RWContext *rw,
704 H264RawSEIDisplayOrientation *current)
708 flag(display_orientation_cancel_flag);
709 if (!current->display_orientation_cancel_flag) {
712 u(16, anticlockwise_rotation, 0, 65535);
713 ue(display_orientation_repetition_period, 0, 16384);
714 flag(display_orientation_extension_flag);
720 static int FUNC(sei_payload)(CodedBitstreamContext *ctx, RWContext *rw,
721 H264RawSEIPayload *current)
724 int start_position, end_position;
727 start_position = get_bits_count(rw);
729 start_position = put_bits_count(rw);
732 switch (current->payload_type) {
733 case H264_SEI_TYPE_BUFFERING_PERIOD:
734 CHECK(FUNC(sei_buffering_period)
735 (ctx, rw, ¤t->payload.buffering_period));
737 case H264_SEI_TYPE_PIC_TIMING:
738 CHECK(FUNC(sei_pic_timing)
739 (ctx, rw, ¤t->payload.pic_timing));
741 case H264_SEI_TYPE_FILLER_PAYLOAD:
743 for (i = 0; i < current->payload_size; i++)
744 fixed(8, ff_byte, 0xff);
747 case H264_SEI_TYPE_USER_DATA_REGISTERED:
748 CHECK(FUNC(sei_user_data_registered)
749 (ctx, rw, ¤t->payload.user_data_registered, ¤t->payload_size));
751 case H264_SEI_TYPE_USER_DATA_UNREGISTERED:
752 CHECK(FUNC(sei_user_data_unregistered)
753 (ctx, rw, ¤t->payload.user_data_unregistered, ¤t->payload_size));
755 case H264_SEI_TYPE_RECOVERY_POINT:
756 CHECK(FUNC(sei_recovery_point)
757 (ctx, rw, ¤t->payload.recovery_point));
759 case H264_SEI_TYPE_DISPLAY_ORIENTATION:
760 CHECK(FUNC(sei_display_orientation)
761 (ctx, rw, ¤t->payload.display_orientation));
765 allocate(current->payload.other.data, current->payload_size);
766 for (i = 0; i < current->payload_size; i++)
767 xu(8, payload_byte, current->payload.other.data[i], 0, 255);
771 if (byte_alignment(rw)) {
772 fixed(1, bit_equal_to_one, 1);
773 while (byte_alignment(rw))
774 fixed(1, bit_equal_to_zero, 0);
778 end_position = get_bits_count(rw);
779 if (end_position < start_position + 8 * current->payload_size) {
780 av_log(ctx->log_ctx, AV_LOG_ERROR, "Incorrect SEI payload length: "
781 "header %"PRIu32" bits, actually %d bits.\n",
782 8 * current->payload_size,
783 end_position - start_position);
784 return AVERROR_INVALIDDATA;
787 end_position = put_bits_count(rw);
788 current->payload_size = (end_position - start_position) / 8;
794 static int FUNC(sei)(CodedBitstreamContext *ctx, RWContext *rw,
799 HEADER("Supplemental Enhancement Information");
801 CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
805 for (k = 0; k < H264_MAX_SEI_PAYLOADS; k++) {
806 uint32_t payload_type = 0;
807 uint32_t payload_size = 0;
810 while (show_bits(rw, 8) == 0xff) {
811 fixed(8, ff_byte, 0xff);
814 xu(8, last_payload_type_byte, tmp, 0, 254);
817 while (show_bits(rw, 8) == 0xff) {
818 fixed(8, ff_byte, 0xff);
821 xu(8, last_payload_size_byte, tmp, 0, 254);
824 current->payload[k].payload_type = payload_type;
825 current->payload[k].payload_size = payload_size;
827 CHECK(FUNC(sei_payload)(ctx, rw, ¤t->payload[k]));
829 if (!cbs_h2645_read_more_rbsp_data(rw))
832 if (k >= H264_MAX_SEI_PAYLOADS) {
833 av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many payloads in "
834 "SEI message: found %d.\n", k);
835 return AVERROR_INVALIDDATA;
837 current->payload_count = k + 1;
839 for (k = 0; k < current->payload_count; k++) {
840 PutBitContext start_state;
844 // Somewhat clumsy: we write the payload twice when
845 // we don't know the size in advance. This will mess
846 // with trace output, but is otherwise harmless.
848 need_size = !current->payload[k].payload_size;
849 for (i = 0; i < 1 + need_size; i++) {
852 tmp = current->payload[k].payload_type;
854 fixed(8, ff_byte, 0xff);
857 xu(8, last_payload_type_byte, tmp, 0, 254);
859 tmp = current->payload[k].payload_size;
861 fixed(8, ff_byte, 0xff);
864 xu(8, last_payload_size_byte, tmp, 0, 254);
866 CHECK(FUNC(sei_payload)(ctx, rw, ¤t->payload[k]));
871 CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
876 static int FUNC(aud)(CodedBitstreamContext *ctx, RWContext *rw,
881 HEADER("Access Unit Delimiter");
883 CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
886 u(3, primary_pic_type, 0, 7);
888 CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
893 static int FUNC(ref_pic_list_modification)(CodedBitstreamContext *ctx, RWContext *rw,
894 H264RawSliceHeader *current)
896 CodedBitstreamH264Context *h264 = ctx->priv_data;
897 const H264RawSPS *sps = h264->active_sps;
900 if (current->slice_type % 5 != 2 &&
901 current->slice_type % 5 != 4) {
902 flag(ref_pic_list_modification_flag_l0);
903 if (current->ref_pic_list_modification_flag_l0) {
904 for (i = 0; i < H264_MAX_RPLM_COUNT; i++) {
905 xue(modification_of_pic_nums_idc,
906 current->rplm_l0[i].modification_of_pic_nums_idc, 0, 3);
908 mopn = current->rplm_l0[i].modification_of_pic_nums_idc;
912 if (mopn == 0 || mopn == 1)
913 xue(abs_diff_pic_num_minus1,
914 current->rplm_l0[i].abs_diff_pic_num_minus1,
915 0, (1 + current->field_pic_flag) *
916 (1 << (sps->log2_max_frame_num_minus4 + 4)));
918 xue(long_term_pic_num,
919 current->rplm_l0[i].long_term_pic_num,
920 0, sps->max_num_ref_frames - 1);
925 if (current->slice_type % 5 == 1) {
926 flag(ref_pic_list_modification_flag_l1);
927 if (current->ref_pic_list_modification_flag_l1) {
928 for (i = 0; i < H264_MAX_RPLM_COUNT; i++) {
929 xue(modification_of_pic_nums_idc,
930 current->rplm_l1[i].modification_of_pic_nums_idc, 0, 3);
932 mopn = current->rplm_l1[i].modification_of_pic_nums_idc;
936 if (mopn == 0 || mopn == 1)
937 xue(abs_diff_pic_num_minus1,
938 current->rplm_l1[i].abs_diff_pic_num_minus1,
939 0, (1 + current->field_pic_flag) *
940 (1 << (sps->log2_max_frame_num_minus4 + 4)));
942 xue(long_term_pic_num,
943 current->rplm_l1[i].long_term_pic_num,
944 0, sps->max_num_ref_frames - 1);
952 static int FUNC(pred_weight_table)(CodedBitstreamContext *ctx, RWContext *rw,
953 H264RawSliceHeader *current)
955 CodedBitstreamH264Context *h264 = ctx->priv_data;
956 const H264RawSPS *sps = h264->active_sps;
960 ue(luma_log2_weight_denom, 0, 7);
962 chroma = !sps->separate_colour_plane_flag && sps->chroma_format_idc != 0;
964 ue(chroma_log2_weight_denom, 0, 7);
966 for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) {
967 flag(luma_weight_l0_flag[i]);
968 if (current->luma_weight_l0_flag[i]) {
969 se(luma_weight_l0[i], -128, +127);
970 se(luma_offset_l0[i], -128, +127);
973 flag(chroma_weight_l0_flag[i]);
974 if (current->chroma_weight_l0_flag[i]) {
975 for (j = 0; j < 2; j++) {
976 se(chroma_weight_l0[i][j], -128, +127);
977 se(chroma_offset_l0[i][j], -128, +127);
983 if (current->slice_type % 5 == 1) {
984 for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) {
985 flag(luma_weight_l1_flag[i]);
986 if (current->luma_weight_l1_flag[i]) {
987 se(luma_weight_l1[i], -128, +127);
988 se(luma_offset_l1[i], -128, +127);
991 flag(chroma_weight_l1_flag[i]);
992 if (current->chroma_weight_l1_flag[i]) {
993 for (j = 0; j < 2; j++) {
994 se(chroma_weight_l1[i][j], -128, +127);
995 se(chroma_offset_l1[i][j], -128, +127);
1005 static int FUNC(dec_ref_pic_marking)(CodedBitstreamContext *ctx, RWContext *rw,
1006 H264RawSliceHeader *current, int idr_pic_flag)
1008 CodedBitstreamH264Context *h264 = ctx->priv_data;
1009 const H264RawSPS *sps = h264->active_sps;
1014 flag(no_output_of_prior_pics_flag);
1015 flag(long_term_reference_flag);
1017 flag(adaptive_ref_pic_marking_mode_flag);
1018 if (current->adaptive_ref_pic_marking_mode_flag) {
1019 for (i = 0; i < H264_MAX_MMCO_COUNT; i++) {
1020 xue(memory_management_control_operation,
1021 current->mmco[i].memory_management_control_operation,
1024 mmco = current->mmco[i].memory_management_control_operation;
1028 if (mmco == 1 || mmco == 3)
1029 xue(difference_of_pic_nums_minus1,
1030 current->mmco[i].difference_of_pic_nums_minus1,
1033 xue(long_term_pic_num,
1034 current->mmco[i].long_term_pic_num,
1035 0, sps->max_num_ref_frames - 1);
1036 if (mmco == 3 || mmco == 6)
1037 xue(long_term_frame_idx,
1038 current->mmco[i].long_term_frame_idx,
1039 0, sps->max_num_ref_frames - 1);
1041 xue(max_long_term_frame_idx_plus1,
1042 current->mmco[i].max_long_term_frame_idx_plus1,
1043 0, sps->max_num_ref_frames);
1045 if (i == H264_MAX_MMCO_COUNT) {
1046 av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many "
1047 "memory management control operations.\n");
1048 return AVERROR_INVALIDDATA;
1056 static int FUNC(slice_header)(CodedBitstreamContext *ctx, RWContext *rw,
1057 H264RawSliceHeader *current)
1059 CodedBitstreamH264Context *h264 = ctx->priv_data;
1060 const H264RawSPS *sps;
1061 const H264RawPPS *pps;
1064 int slice_type_i, slice_type_p, slice_type_b;
1065 int slice_type_si, slice_type_sp;
1067 HEADER("Slice Header");
1069 CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
1070 1 << H264_NAL_SLICE |
1071 1 << H264_NAL_IDR_SLICE |
1072 1 << H264_NAL_AUXILIARY_SLICE));
1074 if (current->nal_unit_header.nal_unit_type == H264_NAL_AUXILIARY_SLICE) {
1075 if (!h264->last_slice_nal_unit_type) {
1076 av_log(ctx->log_ctx, AV_LOG_ERROR, "Auxiliary slice "
1077 "is not decodable without the main picture "
1078 "in the same access unit.\n");
1079 return AVERROR_INVALIDDATA;
1082 h264->last_slice_nal_unit_type =
1083 current->nal_unit_header.nal_unit_type;
1085 idr_pic_flag = h264->last_slice_nal_unit_type == H264_NAL_IDR_SLICE;
1087 ue(first_mb_in_slice, 0, H264_MAX_MB_PIC_SIZE - 1);
1088 ue(slice_type, 0, 9);
1090 slice_type_i = current->slice_type % 5 == 2;
1091 slice_type_p = current->slice_type % 5 == 0;
1092 slice_type_b = current->slice_type % 5 == 1;
1093 slice_type_si = current->slice_type % 5 == 4;
1094 slice_type_sp = current->slice_type % 5 == 3;
1096 if (idr_pic_flag && !(slice_type_i || slice_type_si)) {
1097 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid slice type %d "
1098 "for IDR picture.\n", current->slice_type);
1099 return AVERROR_INVALIDDATA;
1102 ue(pic_parameter_set_id, 0, 255);
1104 pps = h264->pps[current->pic_parameter_set_id];
1106 av_log(ctx->log_ctx, AV_LOG_ERROR, "PPS id %d not available.\n",
1107 current->pic_parameter_set_id);
1108 return AVERROR_INVALIDDATA;
1110 h264->active_pps = pps;
1112 sps = h264->sps[pps->seq_parameter_set_id];
1114 av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
1115 pps->seq_parameter_set_id);
1116 return AVERROR_INVALIDDATA;
1118 h264->active_sps = sps;
1120 if (sps->separate_colour_plane_flag)
1121 u(2, colour_plane_id, 0, 2);
1123 u(sps->log2_max_frame_num_minus4 + 4, frame_num,
1124 0, MAX_UINT_BITS(sps->log2_max_frame_num_minus4 + 4));
1126 if (!sps->frame_mbs_only_flag) {
1127 flag(field_pic_flag);
1128 if (current->field_pic_flag)
1129 flag(bottom_field_flag);
1131 infer(bottom_field_flag, 0);
1133 infer(field_pic_flag, 0);
1134 infer(bottom_field_flag, 0);
1138 ue(idr_pic_id, 0, 65535);
1140 if (sps->pic_order_cnt_type == 0) {
1141 u(sps->log2_max_pic_order_cnt_lsb_minus4 + 4, pic_order_cnt_lsb,
1142 0, MAX_UINT_BITS(sps->log2_max_pic_order_cnt_lsb_minus4 + 4));
1143 if (pps->bottom_field_pic_order_in_frame_present_flag &&
1144 !current->field_pic_flag)
1145 se(delta_pic_order_cnt_bottom, INT32_MIN + 1, INT32_MAX);
1147 } else if (sps->pic_order_cnt_type == 1) {
1148 if (!sps->delta_pic_order_always_zero_flag) {
1149 se(delta_pic_order_cnt[0], INT32_MIN + 1, INT32_MAX);
1150 if (pps->bottom_field_pic_order_in_frame_present_flag &&
1151 !current->field_pic_flag)
1152 se(delta_pic_order_cnt[1], INT32_MIN + 1, INT32_MAX);
1154 infer(delta_pic_order_cnt[1], 0);
1156 infer(delta_pic_order_cnt[0], 0);
1157 infer(delta_pic_order_cnt[1], 0);
1161 if (pps->redundant_pic_cnt_present_flag)
1162 ue(redundant_pic_cnt, 0, 127);
1165 flag(direct_spatial_mv_pred_flag);
1167 if (slice_type_p || slice_type_sp || slice_type_b) {
1168 flag(num_ref_idx_active_override_flag);
1169 if (current->num_ref_idx_active_override_flag) {
1170 ue(num_ref_idx_l0_active_minus1, 0, 31);
1172 ue(num_ref_idx_l1_active_minus1, 0, 31);
1174 infer(num_ref_idx_l0_active_minus1,
1175 pps->num_ref_idx_l0_default_active_minus1);
1176 infer(num_ref_idx_l1_active_minus1,
1177 pps->num_ref_idx_l1_default_active_minus1);
1181 if (current->nal_unit_header.nal_unit_type == 20 ||
1182 current->nal_unit_header.nal_unit_type == 21) {
1183 av_log(ctx->log_ctx, AV_LOG_ERROR, "MVC / 3DAVC not supported.\n");
1184 return AVERROR_PATCHWELCOME;
1186 CHECK(FUNC(ref_pic_list_modification)(ctx, rw, current));
1189 if ((pps->weighted_pred_flag && (slice_type_p || slice_type_sp)) ||
1190 (pps->weighted_bipred_idc == 1 && slice_type_b)) {
1191 CHECK(FUNC(pred_weight_table)(ctx, rw, current));
1194 if (current->nal_unit_header.nal_ref_idc != 0) {
1195 CHECK(FUNC(dec_ref_pic_marking)(ctx, rw, current, idr_pic_flag));
1198 if (pps->entropy_coding_mode_flag &&
1199 !slice_type_i && !slice_type_si) {
1200 ue(cabac_init_idc, 0, 2);
1203 se(slice_qp_delta, - 51 - 6 * sps->bit_depth_luma_minus8,
1204 + 51 + 6 * sps->bit_depth_luma_minus8);
1205 if (slice_type_sp || slice_type_si) {
1207 flag(sp_for_switch_flag);
1208 se(slice_qs_delta, -51, +51);
1211 if (pps->deblocking_filter_control_present_flag) {
1212 ue(disable_deblocking_filter_idc, 0, 2);
1213 if (current->disable_deblocking_filter_idc != 1) {
1214 se(slice_alpha_c0_offset_div2, -6, +6);
1215 se(slice_beta_offset_div2, -6, +6);
1217 infer(slice_alpha_c0_offset_div2, 0);
1218 infer(slice_beta_offset_div2, 0);
1221 infer(disable_deblocking_filter_idc, 0);
1222 infer(slice_alpha_c0_offset_div2, 0);
1223 infer(slice_beta_offset_div2, 0);
1226 if (pps->num_slice_groups_minus1 > 0 &&
1227 pps->slice_group_map_type >= 3 &&
1228 pps->slice_group_map_type <= 5) {
1229 unsigned int pic_size, max, bits;
1231 pic_size = (sps->pic_width_in_mbs_minus1 + 1) *
1232 (sps->pic_height_in_map_units_minus1 + 1);
1233 max = (pic_size + pps->slice_group_change_rate_minus1) /
1234 (pps->slice_group_change_rate_minus1 + 1);
1235 bits = av_log2(2 * max - 1);
1237 u(bits, slice_group_change_cycle, 0, max);
1240 if (pps->entropy_coding_mode_flag) {
1241 while (byte_alignment(rw))
1242 fixed(1, cabac_alignment_one_bit, 1);
1248 static int FUNC(filler)(CodedBitstreamContext *ctx, RWContext *rw,
1249 H264RawFiller *current)
1253 HEADER("Filler Data");
1255 CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
1256 1 << H264_NAL_FILLER_DATA));
1259 while (show_bits(rw, 8) == 0xff) {
1260 fixed(8, ff_byte, 0xff);
1261 ++current->filler_size;
1266 for (i = 0; i < current->filler_size; i++)
1267 fixed(8, ff_byte, 0xff);
1271 CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));