1 /*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
FUNC(rbsp_trailing_bits)19 static int FUNC(rbsp_trailing_bits)(CodedBitstreamContext *ctx, RWContext *rw)
20 {
21 int err;
22
23 fixed(1, rbsp_stop_one_bit, 1);
24 while (byte_alignment(rw) != 0)
25 fixed(1, rbsp_alignment_zero_bit, 0);
26
27 return 0;
28 }
29
FUNC(nal_unit_header)30 static int FUNC(nal_unit_header)(CodedBitstreamContext *ctx, RWContext *rw,
31 H264RawNALUnitHeader *current,
32 uint32_t valid_type_mask)
33 {
34 int err;
35
36 fixed(1, forbidden_zero_bit, 0);
37 ub(2, nal_ref_idc);
38 ub(5, nal_unit_type);
39
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;
44 }
45
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);
51 else
52 flag(avc_3d_extension_flag);
53
54 if (current->svc_extension_flag) {
55 av_log(ctx->log_ctx, AV_LOG_ERROR, "SVC not supported.\n");
56 return AVERROR_PATCHWELCOME;
57
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;
61
62 } else {
63 av_log(ctx->log_ctx, AV_LOG_ERROR, "MVC not supported.\n");
64 return AVERROR_PATCHWELCOME;
65 }
66 }
67
68 return 0;
69 }
70
FUNC(scaling_list)71 static int FUNC(scaling_list)(CodedBitstreamContext *ctx, RWContext *rw,
72 H264RawScalingList *current,
73 int size_of_scaling_list)
74 {
75 int err, i, scale;
76
77 scale = 8;
78 for (i = 0; i < size_of_scaling_list; i++) {
79 ses(delta_scale[i], -128, +127, 1, i);
80 scale = (scale + current->delta_scale[i] + 256) % 256;
81 if (scale == 0)
82 break;
83 }
84
85 return 0;
86 }
87
FUNC(hrd_parameters)88 static int FUNC(hrd_parameters)(CodedBitstreamContext *ctx, RWContext *rw,
89 H264RawHRD *current)
90 {
91 int err, i;
92
93 ue(cpb_cnt_minus1, 0, 31);
94 ub(4, bit_rate_scale);
95 ub(4, cpb_size_scale);
96
97 for (i = 0; i <= current->cpb_cnt_minus1; i++) {
98 ues(bit_rate_value_minus1[i], 0, UINT32_MAX - 1, 1, i);
99 ues(cpb_size_value_minus1[i], 0, UINT32_MAX - 1, 1, i);
100 flags(cbr_flag[i], 1, i);
101 }
102
103 ub(5, initial_cpb_removal_delay_length_minus1);
104 ub(5, cpb_removal_delay_length_minus1);
105 ub(5, dpb_output_delay_length_minus1);
106 ub(5, time_offset_length);
107
108 return 0;
109 }
110
FUNC(vui_parameters)111 static int FUNC(vui_parameters)(CodedBitstreamContext *ctx, RWContext *rw,
112 H264RawVUI *current, H264RawSPS *sps)
113 {
114 int err;
115
116 flag(aspect_ratio_info_present_flag);
117 if (current->aspect_ratio_info_present_flag) {
118 ub(8, aspect_ratio_idc);
119 if (current->aspect_ratio_idc == 255) {
120 ub(16, sar_width);
121 ub(16, sar_height);
122 }
123 } else {
124 infer(aspect_ratio_idc, 0);
125 }
126
127 flag(overscan_info_present_flag);
128 if (current->overscan_info_present_flag)
129 flag(overscan_appropriate_flag);
130
131 flag(video_signal_type_present_flag);
132 if (current->video_signal_type_present_flag) {
133 ub(3, video_format);
134 flag(video_full_range_flag);
135 flag(colour_description_present_flag);
136 if (current->colour_description_present_flag) {
137 ub(8, colour_primaries);
138 ub(8, transfer_characteristics);
139 ub(8, matrix_coefficients);
140 } else {
141 infer(colour_primaries, 2);
142 infer(transfer_characteristics, 2);
143 infer(matrix_coefficients, 2);
144 }
145 } else {
146 infer(video_format, 5);
147 infer(video_full_range_flag, 0);
148 infer(colour_primaries, 2);
149 infer(transfer_characteristics, 2);
150 infer(matrix_coefficients, 2);
151 }
152
153 flag(chroma_loc_info_present_flag);
154 if (current->chroma_loc_info_present_flag) {
155 ue(chroma_sample_loc_type_top_field, 0, 5);
156 ue(chroma_sample_loc_type_bottom_field, 0, 5);
157 } else {
158 infer(chroma_sample_loc_type_top_field, 0);
159 infer(chroma_sample_loc_type_bottom_field, 0);
160 }
161
162 flag(timing_info_present_flag);
163 if (current->timing_info_present_flag) {
164 u(32, num_units_in_tick, 1, UINT32_MAX);
165 u(32, time_scale, 1, UINT32_MAX);
166 flag(fixed_frame_rate_flag);
167 } else {
168 infer(fixed_frame_rate_flag, 0);
169 }
170
171 flag(nal_hrd_parameters_present_flag);
172 if (current->nal_hrd_parameters_present_flag)
173 CHECK(FUNC(hrd_parameters)(ctx, rw, ¤t->nal_hrd_parameters));
174
175 flag(vcl_hrd_parameters_present_flag);
176 if (current->vcl_hrd_parameters_present_flag)
177 CHECK(FUNC(hrd_parameters)(ctx, rw, ¤t->vcl_hrd_parameters));
178
179 if (current->nal_hrd_parameters_present_flag ||
180 current->vcl_hrd_parameters_present_flag)
181 flag(low_delay_hrd_flag);
182 else
183 infer(low_delay_hrd_flag, 1 - current->fixed_frame_rate_flag);
184
185 flag(pic_struct_present_flag);
186
187 flag(bitstream_restriction_flag);
188 if (current->bitstream_restriction_flag) {
189 flag(motion_vectors_over_pic_boundaries_flag);
190 ue(max_bytes_per_pic_denom, 0, 16);
191 ue(max_bits_per_mb_denom, 0, 16);
192 // The current version of the standard constrains this to be in
193 // [0,15], but older versions allow 16.
194 ue(log2_max_mv_length_horizontal, 0, 16);
195 ue(log2_max_mv_length_vertical, 0, 16);
196 ue(max_num_reorder_frames, 0, H264_MAX_DPB_FRAMES);
197 ue(max_dec_frame_buffering, 0, H264_MAX_DPB_FRAMES);
198 } else {
199 infer(motion_vectors_over_pic_boundaries_flag, 1);
200 infer(max_bytes_per_pic_denom, 2);
201 infer(max_bits_per_mb_denom, 1);
202 infer(log2_max_mv_length_horizontal, 15);
203 infer(log2_max_mv_length_vertical, 15);
204
205 if ((sps->profile_idc == 44 || sps->profile_idc == 86 ||
206 sps->profile_idc == 100 || sps->profile_idc == 110 ||
207 sps->profile_idc == 122 || sps->profile_idc == 244) &&
208 sps->constraint_set3_flag) {
209 infer(max_num_reorder_frames, 0);
210 infer(max_dec_frame_buffering, 0);
211 } else {
212 infer(max_num_reorder_frames, H264_MAX_DPB_FRAMES);
213 infer(max_dec_frame_buffering, H264_MAX_DPB_FRAMES);
214 }
215 }
216
217 return 0;
218 }
219
FUNC(vui_parameters_default)220 static int FUNC(vui_parameters_default)(CodedBitstreamContext *ctx,
221 RWContext *rw, H264RawVUI *current,
222 H264RawSPS *sps)
223 {
224 infer(aspect_ratio_idc, 0);
225
226 infer(video_format, 5);
227 infer(video_full_range_flag, 0);
228 infer(colour_primaries, 2);
229 infer(transfer_characteristics, 2);
230 infer(matrix_coefficients, 2);
231
232 infer(chroma_sample_loc_type_top_field, 0);
233 infer(chroma_sample_loc_type_bottom_field, 0);
234
235 infer(fixed_frame_rate_flag, 0);
236 infer(low_delay_hrd_flag, 1);
237
238 infer(pic_struct_present_flag, 0);
239
240 infer(motion_vectors_over_pic_boundaries_flag, 1);
241 infer(max_bytes_per_pic_denom, 2);
242 infer(max_bits_per_mb_denom, 1);
243 infer(log2_max_mv_length_horizontal, 15);
244 infer(log2_max_mv_length_vertical, 15);
245
246 if ((sps->profile_idc == 44 || sps->profile_idc == 86 ||
247 sps->profile_idc == 100 || sps->profile_idc == 110 ||
248 sps->profile_idc == 122 || sps->profile_idc == 244) &&
249 sps->constraint_set3_flag) {
250 infer(max_num_reorder_frames, 0);
251 infer(max_dec_frame_buffering, 0);
252 } else {
253 infer(max_num_reorder_frames, H264_MAX_DPB_FRAMES);
254 infer(max_dec_frame_buffering, H264_MAX_DPB_FRAMES);
255 }
256
257 return 0;
258 }
259
FUNC(sps)260 static int FUNC(sps)(CodedBitstreamContext *ctx, RWContext *rw,
261 H264RawSPS *current)
262 {
263 int err, i;
264
265 HEADER("Sequence Parameter Set");
266
267 CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
268 1 << H264_NAL_SPS));
269
270 ub(8, profile_idc);
271
272 flag(constraint_set0_flag);
273 flag(constraint_set1_flag);
274 flag(constraint_set2_flag);
275 flag(constraint_set3_flag);
276 flag(constraint_set4_flag);
277 flag(constraint_set5_flag);
278
279 u(2, reserved_zero_2bits, 0, 0);
280
281 ub(8, level_idc);
282
283 ue(seq_parameter_set_id, 0, 31);
284
285 if (current->profile_idc == 100 || current->profile_idc == 110 ||
286 current->profile_idc == 122 || current->profile_idc == 244 ||
287 current->profile_idc == 44 || current->profile_idc == 83 ||
288 current->profile_idc == 86 || current->profile_idc == 118 ||
289 current->profile_idc == 128 || current->profile_idc == 138) {
290 ue(chroma_format_idc, 0, 3);
291
292 if (current->chroma_format_idc == 3)
293 flag(separate_colour_plane_flag);
294 else
295 infer(separate_colour_plane_flag, 0);
296
297 ue(bit_depth_luma_minus8, 0, 6);
298 ue(bit_depth_chroma_minus8, 0, 6);
299
300 flag(qpprime_y_zero_transform_bypass_flag);
301
302 flag(seq_scaling_matrix_present_flag);
303 if (current->seq_scaling_matrix_present_flag) {
304 for (i = 0; i < ((current->chroma_format_idc != 3) ? 8 : 12); i++) {
305 flags(seq_scaling_list_present_flag[i], 1, i);
306 if (current->seq_scaling_list_present_flag[i]) {
307 if (i < 6)
308 CHECK(FUNC(scaling_list)(ctx, rw,
309 ¤t->scaling_list_4x4[i],
310 16));
311 else
312 CHECK(FUNC(scaling_list)(ctx, rw,
313 ¤t->scaling_list_8x8[i - 6],
314 64));
315 }
316 }
317 }
318 } else {
319 infer(chroma_format_idc, current->profile_idc == 183 ? 0 : 1);
320
321 infer(separate_colour_plane_flag, 0);
322 infer(bit_depth_luma_minus8, 0);
323 infer(bit_depth_chroma_minus8, 0);
324 }
325
326 ue(log2_max_frame_num_minus4, 0, 12);
327 ue(pic_order_cnt_type, 0, 2);
328
329 if (current->pic_order_cnt_type == 0) {
330 ue(log2_max_pic_order_cnt_lsb_minus4, 0, 12);
331 } else if (current->pic_order_cnt_type == 1) {
332 flag(delta_pic_order_always_zero_flag);
333 se(offset_for_non_ref_pic, INT32_MIN + 1, INT32_MAX);
334 se(offset_for_top_to_bottom_field, INT32_MIN + 1, INT32_MAX);
335 ue(num_ref_frames_in_pic_order_cnt_cycle, 0, 255);
336
337 for (i = 0; i < current->num_ref_frames_in_pic_order_cnt_cycle; i++)
338 ses(offset_for_ref_frame[i], INT32_MIN + 1, INT32_MAX, 1, i);
339 }
340
341 ue(max_num_ref_frames, 0, H264_MAX_DPB_FRAMES);
342 flag(gaps_in_frame_num_allowed_flag);
343
344 ue(pic_width_in_mbs_minus1, 0, H264_MAX_MB_WIDTH);
345 ue(pic_height_in_map_units_minus1, 0, H264_MAX_MB_HEIGHT);
346
347 flag(frame_mbs_only_flag);
348 if (!current->frame_mbs_only_flag)
349 flag(mb_adaptive_frame_field_flag);
350
351 flag(direct_8x8_inference_flag);
352
353 flag(frame_cropping_flag);
354 if (current->frame_cropping_flag) {
355 ue(frame_crop_left_offset, 0, H264_MAX_WIDTH);
356 ue(frame_crop_right_offset, 0, H264_MAX_WIDTH);
357 ue(frame_crop_top_offset, 0, H264_MAX_HEIGHT);
358 ue(frame_crop_bottom_offset, 0, H264_MAX_HEIGHT);
359 }
360
361 flag(vui_parameters_present_flag);
362 if (current->vui_parameters_present_flag)
363 CHECK(FUNC(vui_parameters)(ctx, rw, ¤t->vui, current));
364 else
365 CHECK(FUNC(vui_parameters_default)(ctx, rw, ¤t->vui, current));
366
367 CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
368
369 return 0;
370 }
371
FUNC(sps_extension)372 static int FUNC(sps_extension)(CodedBitstreamContext *ctx, RWContext *rw,
373 H264RawSPSExtension *current)
374 {
375 int err;
376
377 HEADER("Sequence Parameter Set Extension");
378
379 CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
380 1 << H264_NAL_SPS_EXT));
381
382 ue(seq_parameter_set_id, 0, 31);
383
384 ue(aux_format_idc, 0, 3);
385
386 if (current->aux_format_idc != 0) {
387 int bits;
388
389 ue(bit_depth_aux_minus8, 0, 4);
390 flag(alpha_incr_flag);
391
392 bits = current->bit_depth_aux_minus8 + 9;
393 ub(bits, alpha_opaque_value);
394 ub(bits, alpha_transparent_value);
395 }
396
397 flag(additional_extension_flag);
398
399 CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
400
401 return 0;
402 }
403
FUNC(pps)404 static int FUNC(pps)(CodedBitstreamContext *ctx, RWContext *rw,
405 H264RawPPS *current)
406 {
407 CodedBitstreamH264Context *h264 = ctx->priv_data;
408 const H264RawSPS *sps;
409 int err, i;
410
411 HEADER("Picture Parameter Set");
412
413 CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
414 1 << H264_NAL_PPS));
415
416 ue(pic_parameter_set_id, 0, 255);
417 ue(seq_parameter_set_id, 0, 31);
418
419 sps = h264->sps[current->seq_parameter_set_id];
420 if (!sps) {
421 av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
422 current->seq_parameter_set_id);
423 return AVERROR_INVALIDDATA;
424 }
425
426 flag(entropy_coding_mode_flag);
427 flag(bottom_field_pic_order_in_frame_present_flag);
428
429 ue(num_slice_groups_minus1, 0, 7);
430 if (current->num_slice_groups_minus1 > 0) {
431 unsigned int pic_size;
432 int iGroup;
433
434 pic_size = (sps->pic_width_in_mbs_minus1 + 1) *
435 (sps->pic_height_in_map_units_minus1 + 1);
436
437 ue(slice_group_map_type, 0, 6);
438
439 if (current->slice_group_map_type == 0) {
440 for (iGroup = 0; iGroup <= current->num_slice_groups_minus1; iGroup++)
441 ues(run_length_minus1[iGroup], 0, pic_size - 1, 1, iGroup);
442
443 } else if (current->slice_group_map_type == 2) {
444 for (iGroup = 0; iGroup < current->num_slice_groups_minus1; iGroup++) {
445 ues(top_left[iGroup], 0, pic_size - 1, 1, iGroup);
446 ues(bottom_right[iGroup],
447 current->top_left[iGroup], pic_size - 1, 1, iGroup);
448 }
449 } else if (current->slice_group_map_type == 3 ||
450 current->slice_group_map_type == 4 ||
451 current->slice_group_map_type == 5) {
452 flag(slice_group_change_direction_flag);
453 ue(slice_group_change_rate_minus1, 0, pic_size - 1);
454 } else if (current->slice_group_map_type == 6) {
455 ue(pic_size_in_map_units_minus1, pic_size - 1, pic_size - 1);
456
457 allocate(current->slice_group_id,
458 current->pic_size_in_map_units_minus1 + 1);
459 for (i = 0; i <= current->pic_size_in_map_units_minus1; i++)
460 us(av_log2(2 * current->num_slice_groups_minus1 + 1),
461 slice_group_id[i], 0, current->num_slice_groups_minus1, 1, i);
462 }
463 }
464
465 ue(num_ref_idx_l0_default_active_minus1, 0, 31);
466 ue(num_ref_idx_l1_default_active_minus1, 0, 31);
467
468 flag(weighted_pred_flag);
469 u(2, weighted_bipred_idc, 0, 2);
470
471 se(pic_init_qp_minus26, -26 - 6 * sps->bit_depth_luma_minus8, +25);
472 se(pic_init_qs_minus26, -26, +25);
473 se(chroma_qp_index_offset, -12, +12);
474
475 flag(deblocking_filter_control_present_flag);
476 flag(constrained_intra_pred_flag);
477 flag(redundant_pic_cnt_present_flag);
478
479 if (more_rbsp_data(current->more_rbsp_data))
480 {
481 flag(transform_8x8_mode_flag);
482
483 flag(pic_scaling_matrix_present_flag);
484 if (current->pic_scaling_matrix_present_flag) {
485 for (i = 0; i < 6 + (((sps->chroma_format_idc != 3) ? 2 : 6) *
486 current->transform_8x8_mode_flag); i++) {
487 flags(pic_scaling_list_present_flag[i], 1, i);
488 if (current->pic_scaling_list_present_flag[i]) {
489 if (i < 6)
490 CHECK(FUNC(scaling_list)(ctx, rw,
491 ¤t->scaling_list_4x4[i],
492 16));
493 else
494 CHECK(FUNC(scaling_list)(ctx, rw,
495 ¤t->scaling_list_8x8[i - 6],
496 64));
497 }
498 }
499 }
500
501 se(second_chroma_qp_index_offset, -12, +12);
502 } else {
503 infer(transform_8x8_mode_flag, 0);
504 infer(pic_scaling_matrix_present_flag, 0);
505 infer(second_chroma_qp_index_offset, current->chroma_qp_index_offset);
506 }
507
508 CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
509
510 return 0;
511 }
512
FUNC(sei_buffering_period)513 static int FUNC(sei_buffering_period)(CodedBitstreamContext *ctx, RWContext *rw,
514 H264RawSEIBufferingPeriod *current)
515 {
516 CodedBitstreamH264Context *h264 = ctx->priv_data;
517 const H264RawSPS *sps;
518 int err, i, length;
519
520 HEADER("Buffering Period");
521
522 ue(seq_parameter_set_id, 0, 31);
523
524 sps = h264->sps[current->seq_parameter_set_id];
525 if (!sps) {
526 av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
527 current->seq_parameter_set_id);
528 return AVERROR_INVALIDDATA;
529 }
530 h264->active_sps = sps;
531
532 if (sps->vui.nal_hrd_parameters_present_flag) {
533 for (i = 0; i <= sps->vui.nal_hrd_parameters.cpb_cnt_minus1; i++) {
534 length = sps->vui.nal_hrd_parameters.initial_cpb_removal_delay_length_minus1 + 1;
535 xu(length, initial_cpb_removal_delay[SchedSelIdx],
536 current->nal.initial_cpb_removal_delay[i],
537 1, MAX_UINT_BITS(length), 1, i);
538 xu(length, initial_cpb_removal_delay_offset[SchedSelIdx],
539 current->nal.initial_cpb_removal_delay_offset[i],
540 0, MAX_UINT_BITS(length), 1, i);
541 }
542 }
543
544 if (sps->vui.vcl_hrd_parameters_present_flag) {
545 for (i = 0; i <= sps->vui.vcl_hrd_parameters.cpb_cnt_minus1; i++) {
546 length = sps->vui.vcl_hrd_parameters.initial_cpb_removal_delay_length_minus1 + 1;
547 xu(length, initial_cpb_removal_delay[SchedSelIdx],
548 current->vcl.initial_cpb_removal_delay[i],
549 1, MAX_UINT_BITS(length), 1, i);
550 xu(length, initial_cpb_removal_delay_offset[SchedSelIdx],
551 current->vcl.initial_cpb_removal_delay_offset[i],
552 0, MAX_UINT_BITS(length), 1, i);
553 }
554 }
555
556 return 0;
557 }
558
FUNC(sei_pic_timestamp)559 static int FUNC(sei_pic_timestamp)(CodedBitstreamContext *ctx, RWContext *rw,
560 H264RawSEIPicTimestamp *current,
561 const H264RawSPS *sps)
562 {
563 uint8_t time_offset_length;
564 int err;
565
566 u(2, ct_type, 0, 2);
567 flag(nuit_field_based_flag);
568 u(5, counting_type, 0, 6);
569 flag(full_timestamp_flag);
570 flag(discontinuity_flag);
571 flag(cnt_dropped_flag);
572 ub(8, n_frames);
573 if (current->full_timestamp_flag) {
574 u(6, seconds_value, 0, 59);
575 u(6, minutes_value, 0, 59);
576 u(5, hours_value, 0, 23);
577 } else {
578 flag(seconds_flag);
579 if (current->seconds_flag) {
580 u(6, seconds_value, 0, 59);
581 flag(minutes_flag);
582 if (current->minutes_flag) {
583 u(6, minutes_value, 0, 59);
584 flag(hours_flag);
585 if (current->hours_flag)
586 u(5, hours_value, 0, 23);
587 }
588 }
589 }
590
591 if (sps->vui.nal_hrd_parameters_present_flag)
592 time_offset_length = sps->vui.nal_hrd_parameters.time_offset_length;
593 else if (sps->vui.vcl_hrd_parameters_present_flag)
594 time_offset_length = sps->vui.vcl_hrd_parameters.time_offset_length;
595 else
596 time_offset_length = 24;
597
598 if (time_offset_length > 0)
599 ib(time_offset_length, time_offset);
600 else
601 infer(time_offset, 0);
602
603 return 0;
604 }
605
FUNC(sei_pic_timing)606 static int FUNC(sei_pic_timing)(CodedBitstreamContext *ctx, RWContext *rw,
607 H264RawSEIPicTiming *current)
608 {
609 CodedBitstreamH264Context *h264 = ctx->priv_data;
610 const H264RawSPS *sps;
611 int err;
612
613 HEADER("Picture Timing");
614
615 sps = h264->active_sps;
616 if (!sps) {
617 // If there is exactly one possible SPS but it is not yet active
618 // then just assume that it should be the active one.
619 int i, k = -1;
620 for (i = 0; i < H264_MAX_SPS_COUNT; i++) {
621 if (h264->sps[i]) {
622 if (k >= 0) {
623 k = -1;
624 break;
625 }
626 k = i;
627 }
628 }
629 if (k >= 0)
630 sps = h264->sps[k];
631 }
632 if (!sps) {
633 av_log(ctx->log_ctx, AV_LOG_ERROR,
634 "No active SPS for pic_timing.\n");
635 return AVERROR_INVALIDDATA;
636 }
637
638 if (sps->vui.nal_hrd_parameters_present_flag ||
639 sps->vui.vcl_hrd_parameters_present_flag) {
640 const H264RawHRD *hrd;
641
642 if (sps->vui.nal_hrd_parameters_present_flag)
643 hrd = &sps->vui.nal_hrd_parameters;
644 else if (sps->vui.vcl_hrd_parameters_present_flag)
645 hrd = &sps->vui.vcl_hrd_parameters;
646 else {
647 av_log(ctx->log_ctx, AV_LOG_ERROR,
648 "No HRD parameters for pic_timing.\n");
649 return AVERROR_INVALIDDATA;
650 }
651
652 ub(hrd->cpb_removal_delay_length_minus1 + 1, cpb_removal_delay);
653 ub(hrd->dpb_output_delay_length_minus1 + 1, dpb_output_delay);
654 }
655
656 if (sps->vui.pic_struct_present_flag) {
657 static const uint8_t num_clock_ts[9] = {
658 1, 1, 1, 2, 2, 3, 3, 2, 3
659 };
660 int i;
661
662 u(4, pic_struct, 0, 8);
663 if (current->pic_struct > 8)
664 return AVERROR_INVALIDDATA;
665
666 for (i = 0; i < num_clock_ts[current->pic_struct]; i++) {
667 flags(clock_timestamp_flag[i], 1, i);
668 if (current->clock_timestamp_flag[i])
669 CHECK(FUNC(sei_pic_timestamp)(ctx, rw,
670 ¤t->timestamp[i], sps));
671 }
672 }
673
674 return 0;
675 }
676
FUNC(sei_pan_scan_rect)677 static int FUNC(sei_pan_scan_rect)(CodedBitstreamContext *ctx, RWContext *rw,
678 H264RawSEIPanScanRect *current)
679 {
680 int err, i;
681
682 HEADER("Pan-Scan Rectangle");
683
684 ue(pan_scan_rect_id, 0, UINT32_MAX - 1);
685 flag(pan_scan_rect_cancel_flag);
686
687 if (!current->pan_scan_rect_cancel_flag) {
688 ue(pan_scan_cnt_minus1, 0, 2);
689
690 for (i = 0; i <= current->pan_scan_cnt_minus1; i++) {
691 ses(pan_scan_rect_left_offset[i], INT32_MIN + 1, INT32_MAX, 1, i);
692 ses(pan_scan_rect_right_offset[i], INT32_MIN + 1, INT32_MAX, 1, i);
693 ses(pan_scan_rect_top_offset[i], INT32_MIN + 1, INT32_MAX, 1, i);
694 ses(pan_scan_rect_bottom_offset[i], INT32_MIN + 1, INT32_MAX, 1, i);
695 }
696
697 ue(pan_scan_rect_repetition_period, 0, 16384);
698 }
699
700 return 0;
701 }
702
FUNC(sei_user_data_registered)703 static int FUNC(sei_user_data_registered)(CodedBitstreamContext *ctx, RWContext *rw,
704 H264RawSEIUserDataRegistered *current,
705 uint32_t *payload_size)
706 {
707 int err, i, j;
708
709 HEADER("User Data Registered ITU-T T.35");
710
711 u(8, itu_t_t35_country_code, 0x00, 0xff);
712 if (current->itu_t_t35_country_code != 0xff)
713 i = 1;
714 else {
715 u(8, itu_t_t35_country_code_extension_byte, 0x00, 0xff);
716 i = 2;
717 }
718
719 #ifdef READ
720 if (*payload_size < i) {
721 av_log(ctx->log_ctx, AV_LOG_ERROR,
722 "Invalid SEI user data registered payload.\n");
723 return AVERROR_INVALIDDATA;
724 }
725 current->data_length = *payload_size - i;
726 #else
727 *payload_size = i + current->data_length;
728 #endif
729
730 allocate(current->data, current->data_length);
731 for (j = 0; j < current->data_length; j++)
732 xu(8, itu_t_t35_payload_byte[i], current->data[j], 0x00, 0xff, 1, i + j);
733
734 return 0;
735 }
736
FUNC(sei_user_data_unregistered)737 static int FUNC(sei_user_data_unregistered)(CodedBitstreamContext *ctx, RWContext *rw,
738 H264RawSEIUserDataUnregistered *current,
739 uint32_t *payload_size)
740 {
741 int err, i;
742
743 HEADER("User Data Unregistered");
744
745 #ifdef READ
746 if (*payload_size < 16) {
747 av_log(ctx->log_ctx, AV_LOG_ERROR,
748 "Invalid SEI user data unregistered payload.\n");
749 return AVERROR_INVALIDDATA;
750 }
751 current->data_length = *payload_size - 16;
752 #else
753 *payload_size = 16 + current->data_length;
754 #endif
755
756 for (i = 0; i < 16; i++)
757 us(8, uuid_iso_iec_11578[i], 0x00, 0xff, 1, i);
758
759 allocate(current->data, current->data_length);
760
761 for (i = 0; i < current->data_length; i++)
762 xu(8, user_data_payload_byte[i], current->data[i], 0x00, 0xff, 1, i);
763
764 return 0;
765 }
766
FUNC(sei_recovery_point)767 static int FUNC(sei_recovery_point)(CodedBitstreamContext *ctx, RWContext *rw,
768 H264RawSEIRecoveryPoint *current)
769 {
770 int err;
771
772 HEADER("Recovery Point");
773
774 ue(recovery_frame_cnt, 0, 65535);
775 flag(exact_match_flag);
776 flag(broken_link_flag);
777 u(2, changing_slice_group_idc, 0, 2);
778
779 return 0;
780 }
781
FUNC(sei_display_orientation)782 static int FUNC(sei_display_orientation)(CodedBitstreamContext *ctx, RWContext *rw,
783 H264RawSEIDisplayOrientation *current)
784 {
785 int err;
786
787 HEADER("Display Orientation");
788
789 flag(display_orientation_cancel_flag);
790 if (!current->display_orientation_cancel_flag) {
791 flag(hor_flip);
792 flag(ver_flip);
793 ub(16, anticlockwise_rotation);
794 ue(display_orientation_repetition_period, 0, 16384);
795 flag(display_orientation_extension_flag);
796 }
797
798 return 0;
799 }
800
FUNC(sei_mastering_display_colour_volume)801 static int FUNC(sei_mastering_display_colour_volume)(CodedBitstreamContext *ctx, RWContext *rw,
802 H264RawSEIMasteringDisplayColourVolume *current)
803 {
804 int err, c;
805
806 HEADER("Mastering Display Colour Volume");
807
808 for (c = 0; c < 3; c++) {
809 us(16, display_primaries_x[c], 0, 50000, 1, c);
810 us(16, display_primaries_y[c], 0, 50000, 1, c);
811 }
812
813 u(16, white_point_x, 0, 50000);
814 u(16, white_point_y, 0, 50000);
815
816 u(32, max_display_mastering_luminance, 1, MAX_UINT_BITS(32));
817 u(32, min_display_mastering_luminance, 0, current->max_display_mastering_luminance - 1);
818
819 return 0;
820 }
821
FUNC(sei_alternative_transfer_characteristics)822 static int FUNC(sei_alternative_transfer_characteristics)(CodedBitstreamContext *ctx,
823 RWContext *rw,
824 H264RawSEIAlternativeTransferCharacteristics *current)
825 {
826 int err;
827
828 HEADER("Alternative Transfer Characteristics");
829
830 ub(8, preferred_transfer_characteristics);
831
832 return 0;
833 }
834
FUNC(sei_payload)835 static int FUNC(sei_payload)(CodedBitstreamContext *ctx, RWContext *rw,
836 H264RawSEIPayload *current)
837 {
838 int err, i;
839 int start_position, end_position;
840
841 #ifdef READ
842 start_position = get_bits_count(rw);
843 #else
844 start_position = put_bits_count(rw);
845 #endif
846
847 switch (current->payload_type) {
848 case H264_SEI_TYPE_BUFFERING_PERIOD:
849 CHECK(FUNC(sei_buffering_period)
850 (ctx, rw, ¤t->payload.buffering_period));
851 break;
852 case H264_SEI_TYPE_PIC_TIMING:
853 CHECK(FUNC(sei_pic_timing)
854 (ctx, rw, ¤t->payload.pic_timing));
855 break;
856 case H264_SEI_TYPE_PAN_SCAN_RECT:
857 CHECK(FUNC(sei_pan_scan_rect)
858 (ctx, rw, ¤t->payload.pan_scan_rect));
859 break;
860 case H264_SEI_TYPE_FILLER_PAYLOAD:
861 {
862 for (i = 0; i < current->payload_size; i++)
863 fixed(8, ff_byte, 0xff);
864 }
865 break;
866 case H264_SEI_TYPE_USER_DATA_REGISTERED:
867 CHECK(FUNC(sei_user_data_registered)
868 (ctx, rw, ¤t->payload.user_data_registered, ¤t->payload_size));
869 break;
870 case H264_SEI_TYPE_USER_DATA_UNREGISTERED:
871 CHECK(FUNC(sei_user_data_unregistered)
872 (ctx, rw, ¤t->payload.user_data_unregistered, ¤t->payload_size));
873 break;
874 case H264_SEI_TYPE_RECOVERY_POINT:
875 CHECK(FUNC(sei_recovery_point)
876 (ctx, rw, ¤t->payload.recovery_point));
877 break;
878 case H264_SEI_TYPE_DISPLAY_ORIENTATION:
879 CHECK(FUNC(sei_display_orientation)
880 (ctx, rw, ¤t->payload.display_orientation));
881 break;
882 case H264_SEI_TYPE_MASTERING_DISPLAY_COLOUR_VOLUME:
883 CHECK(FUNC(sei_mastering_display_colour_volume)
884 (ctx, rw, ¤t->payload.mastering_display_colour_volume));
885 break;
886 case H264_SEI_TYPE_ALTERNATIVE_TRANSFER:
887 CHECK(FUNC(sei_alternative_transfer_characteristics)
888 (ctx, rw, ¤t->payload.alternative_transfer_characteristics));
889 break;
890 default:
891 {
892 #ifdef READ
893 current->payload.other.data_length = current->payload_size;
894 #endif
895 allocate(current->payload.other.data, current->payload.other.data_length);
896 for (i = 0; i < current->payload.other.data_length; i++)
897 xu(8, payload_byte[i], current->payload.other.data[i], 0, 255, 1, i);
898 }
899 }
900
901 if (byte_alignment(rw)) {
902 fixed(1, bit_equal_to_one, 1);
903 while (byte_alignment(rw))
904 fixed(1, bit_equal_to_zero, 0);
905 }
906
907 #ifdef READ
908 end_position = get_bits_count(rw);
909 if (end_position < start_position + 8 * current->payload_size) {
910 av_log(ctx->log_ctx, AV_LOG_ERROR, "Incorrect SEI payload length: "
911 "header %"PRIu32" bits, actually %d bits.\n",
912 8 * current->payload_size,
913 end_position - start_position);
914 return AVERROR_INVALIDDATA;
915 }
916 #else
917 end_position = put_bits_count(rw);
918 current->payload_size = (end_position - start_position) / 8;
919 #endif
920
921 return 0;
922 }
923
FUNC(sei)924 static int FUNC(sei)(CodedBitstreamContext *ctx, RWContext *rw,
925 H264RawSEI *current)
926 {
927 int err, k;
928
929 HEADER("Supplemental Enhancement Information");
930
931 CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
932 1 << H264_NAL_SEI));
933
934 #ifdef READ
935 for (k = 0; k < H264_MAX_SEI_PAYLOADS; k++) {
936 uint32_t payload_type = 0;
937 uint32_t payload_size = 0;
938 uint32_t tmp;
939
940 while (show_bits(rw, 8) == 0xff) {
941 fixed(8, ff_byte, 0xff);
942 payload_type += 255;
943 }
944 xu(8, last_payload_type_byte, tmp, 0, 254, 0);
945 payload_type += tmp;
946
947 while (show_bits(rw, 8) == 0xff) {
948 fixed(8, ff_byte, 0xff);
949 payload_size += 255;
950 }
951 xu(8, last_payload_size_byte, tmp, 0, 254, 0);
952 payload_size += tmp;
953
954 current->payload[k].payload_type = payload_type;
955 current->payload[k].payload_size = payload_size;
956
957 current->payload_count++;
958 CHECK(FUNC(sei_payload)(ctx, rw, ¤t->payload[k]));
959
960 if (!cbs_h2645_read_more_rbsp_data(rw))
961 break;
962 }
963 if (k >= H264_MAX_SEI_PAYLOADS) {
964 av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many payloads in "
965 "SEI message: found %d.\n", k);
966 return AVERROR_INVALIDDATA;
967 }
968 #else
969 for (k = 0; k < current->payload_count; k++) {
970 PutBitContext start_state;
971 uint32_t tmp;
972 int need_size, i;
973
974 // Somewhat clumsy: we write the payload twice when
975 // we don't know the size in advance. This will mess
976 // with trace output, but is otherwise harmless.
977 start_state = *rw;
978 need_size = !current->payload[k].payload_size;
979 for (i = 0; i < 1 + need_size; i++) {
980 *rw = start_state;
981
982 tmp = current->payload[k].payload_type;
983 while (tmp >= 255) {
984 fixed(8, ff_byte, 0xff);
985 tmp -= 255;
986 }
987 xu(8, last_payload_type_byte, tmp, 0, 254, 0);
988
989 tmp = current->payload[k].payload_size;
990 while (tmp >= 255) {
991 fixed(8, ff_byte, 0xff);
992 tmp -= 255;
993 }
994 xu(8, last_payload_size_byte, tmp, 0, 254, 0);
995
996 CHECK(FUNC(sei_payload)(ctx, rw, ¤t->payload[k]));
997 }
998 }
999 #endif
1000
1001 CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
1002
1003 return 0;
1004 }
1005
FUNC(aud)1006 static int FUNC(aud)(CodedBitstreamContext *ctx, RWContext *rw,
1007 H264RawAUD *current)
1008 {
1009 int err;
1010
1011 HEADER("Access Unit Delimiter");
1012
1013 CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
1014 1 << H264_NAL_AUD));
1015
1016 ub(3, primary_pic_type);
1017
1018 CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
1019
1020 return 0;
1021 }
1022
FUNC(ref_pic_list_modification)1023 static int FUNC(ref_pic_list_modification)(CodedBitstreamContext *ctx, RWContext *rw,
1024 H264RawSliceHeader *current)
1025 {
1026 CodedBitstreamH264Context *h264 = ctx->priv_data;
1027 const H264RawSPS *sps = h264->active_sps;
1028 int err, i, mopn;
1029
1030 if (current->slice_type % 5 != 2 &&
1031 current->slice_type % 5 != 4) {
1032 flag(ref_pic_list_modification_flag_l0);
1033 if (current->ref_pic_list_modification_flag_l0) {
1034 for (i = 0; i < H264_MAX_RPLM_COUNT; i++) {
1035 xue(modification_of_pic_nums_idc,
1036 current->rplm_l0[i].modification_of_pic_nums_idc, 0, 3, 0);
1037
1038 mopn = current->rplm_l0[i].modification_of_pic_nums_idc;
1039 if (mopn == 3)
1040 break;
1041
1042 if (mopn == 0 || mopn == 1)
1043 xue(abs_diff_pic_num_minus1,
1044 current->rplm_l0[i].abs_diff_pic_num_minus1,
1045 0, (1 + current->field_pic_flag) *
1046 (1 << (sps->log2_max_frame_num_minus4 + 4)), 0);
1047 else if (mopn == 2)
1048 xue(long_term_pic_num,
1049 current->rplm_l0[i].long_term_pic_num,
1050 0, sps->max_num_ref_frames - 1, 0);
1051 }
1052 }
1053 }
1054
1055 if (current->slice_type % 5 == 1) {
1056 flag(ref_pic_list_modification_flag_l1);
1057 if (current->ref_pic_list_modification_flag_l1) {
1058 for (i = 0; i < H264_MAX_RPLM_COUNT; i++) {
1059 xue(modification_of_pic_nums_idc,
1060 current->rplm_l1[i].modification_of_pic_nums_idc, 0, 3, 0);
1061
1062 mopn = current->rplm_l1[i].modification_of_pic_nums_idc;
1063 if (mopn == 3)
1064 break;
1065
1066 if (mopn == 0 || mopn == 1)
1067 xue(abs_diff_pic_num_minus1,
1068 current->rplm_l1[i].abs_diff_pic_num_minus1,
1069 0, (1 + current->field_pic_flag) *
1070 (1 << (sps->log2_max_frame_num_minus4 + 4)), 0);
1071 else if (mopn == 2)
1072 xue(long_term_pic_num,
1073 current->rplm_l1[i].long_term_pic_num,
1074 0, sps->max_num_ref_frames - 1, 0);
1075 }
1076 }
1077 }
1078
1079 return 0;
1080 }
1081
FUNC(pred_weight_table)1082 static int FUNC(pred_weight_table)(CodedBitstreamContext *ctx, RWContext *rw,
1083 H264RawSliceHeader *current)
1084 {
1085 CodedBitstreamH264Context *h264 = ctx->priv_data;
1086 const H264RawSPS *sps = h264->active_sps;
1087 int chroma;
1088 int err, i, j;
1089
1090 ue(luma_log2_weight_denom, 0, 7);
1091
1092 chroma = !sps->separate_colour_plane_flag && sps->chroma_format_idc != 0;
1093 if (chroma)
1094 ue(chroma_log2_weight_denom, 0, 7);
1095
1096 for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) {
1097 flags(luma_weight_l0_flag[i], 1, i);
1098 if (current->luma_weight_l0_flag[i]) {
1099 ses(luma_weight_l0[i], -128, +127, 1, i);
1100 ses(luma_offset_l0[i], -128, +127, 1, i);
1101 }
1102 if (chroma) {
1103 flags(chroma_weight_l0_flag[i], 1, i);
1104 if (current->chroma_weight_l0_flag[i]) {
1105 for (j = 0; j < 2; j++) {
1106 ses(chroma_weight_l0[i][j], -128, +127, 2, i, j);
1107 ses(chroma_offset_l0[i][j], -128, +127, 2, i, j);
1108 }
1109 }
1110 }
1111 }
1112
1113 if (current->slice_type % 5 == 1) {
1114 for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) {
1115 flags(luma_weight_l1_flag[i], 1, i);
1116 if (current->luma_weight_l1_flag[i]) {
1117 ses(luma_weight_l1[i], -128, +127, 1, i);
1118 ses(luma_offset_l1[i], -128, +127, 1, i);
1119 }
1120 if (chroma) {
1121 flags(chroma_weight_l1_flag[i], 1, i);
1122 if (current->chroma_weight_l1_flag[i]) {
1123 for (j = 0; j < 2; j++) {
1124 ses(chroma_weight_l1[i][j], -128, +127, 2, i, j);
1125 ses(chroma_offset_l1[i][j], -128, +127, 2, i, j);
1126 }
1127 }
1128 }
1129 }
1130 }
1131
1132 return 0;
1133 }
1134
FUNC(dec_ref_pic_marking)1135 static int FUNC(dec_ref_pic_marking)(CodedBitstreamContext *ctx, RWContext *rw,
1136 H264RawSliceHeader *current, int idr_pic_flag)
1137 {
1138 CodedBitstreamH264Context *h264 = ctx->priv_data;
1139 const H264RawSPS *sps = h264->active_sps;
1140 int err, i;
1141 uint32_t mmco;
1142
1143 if (idr_pic_flag) {
1144 flag(no_output_of_prior_pics_flag);
1145 flag(long_term_reference_flag);
1146 } else {
1147 flag(adaptive_ref_pic_marking_mode_flag);
1148 if (current->adaptive_ref_pic_marking_mode_flag) {
1149 for (i = 0; i < H264_MAX_MMCO_COUNT; i++) {
1150 xue(memory_management_control_operation,
1151 current->mmco[i].memory_management_control_operation,
1152 0, 6, 0);
1153
1154 mmco = current->mmco[i].memory_management_control_operation;
1155 if (mmco == 0)
1156 break;
1157
1158 if (mmco == 1 || mmco == 3)
1159 xue(difference_of_pic_nums_minus1,
1160 current->mmco[i].difference_of_pic_nums_minus1,
1161 0, INT32_MAX, 0);
1162 if (mmco == 2)
1163 xue(long_term_pic_num,
1164 current->mmco[i].long_term_pic_num,
1165 0, sps->max_num_ref_frames - 1, 0);
1166 if (mmco == 3 || mmco == 6)
1167 xue(long_term_frame_idx,
1168 current->mmco[i].long_term_frame_idx,
1169 0, sps->max_num_ref_frames - 1, 0);
1170 if (mmco == 4)
1171 xue(max_long_term_frame_idx_plus1,
1172 current->mmco[i].max_long_term_frame_idx_plus1,
1173 0, sps->max_num_ref_frames, 0);
1174 }
1175 if (i == H264_MAX_MMCO_COUNT) {
1176 av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many "
1177 "memory management control operations.\n");
1178 return AVERROR_INVALIDDATA;
1179 }
1180 }
1181 }
1182
1183 return 0;
1184 }
1185
FUNC(slice_header)1186 static int FUNC(slice_header)(CodedBitstreamContext *ctx, RWContext *rw,
1187 H264RawSliceHeader *current)
1188 {
1189 CodedBitstreamH264Context *h264 = ctx->priv_data;
1190 const H264RawSPS *sps;
1191 const H264RawPPS *pps;
1192 int err;
1193 int idr_pic_flag;
1194 int slice_type_i, slice_type_p, slice_type_b;
1195 int slice_type_si, slice_type_sp;
1196
1197 HEADER("Slice Header");
1198
1199 CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
1200 1 << H264_NAL_SLICE |
1201 1 << H264_NAL_IDR_SLICE |
1202 1 << H264_NAL_AUXILIARY_SLICE));
1203
1204 if (current->nal_unit_header.nal_unit_type == H264_NAL_AUXILIARY_SLICE) {
1205 if (!h264->last_slice_nal_unit_type) {
1206 av_log(ctx->log_ctx, AV_LOG_ERROR, "Auxiliary slice "
1207 "is not decodable without the main picture "
1208 "in the same access unit.\n");
1209 return AVERROR_INVALIDDATA;
1210 }
1211 idr_pic_flag = h264->last_slice_nal_unit_type == H264_NAL_IDR_SLICE;
1212 } else {
1213 idr_pic_flag = current->nal_unit_header.nal_unit_type == H264_NAL_IDR_SLICE;
1214 }
1215
1216 ue(first_mb_in_slice, 0, H264_MAX_MB_PIC_SIZE - 1);
1217 ue(slice_type, 0, 9);
1218
1219 slice_type_i = current->slice_type % 5 == 2;
1220 slice_type_p = current->slice_type % 5 == 0;
1221 slice_type_b = current->slice_type % 5 == 1;
1222 slice_type_si = current->slice_type % 5 == 4;
1223 slice_type_sp = current->slice_type % 5 == 3;
1224
1225 if (idr_pic_flag && !(slice_type_i || slice_type_si)) {
1226 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid slice type %d "
1227 "for IDR picture.\n", current->slice_type);
1228 return AVERROR_INVALIDDATA;
1229 }
1230
1231 ue(pic_parameter_set_id, 0, 255);
1232
1233 pps = h264->pps[current->pic_parameter_set_id];
1234 if (!pps) {
1235 av_log(ctx->log_ctx, AV_LOG_ERROR, "PPS id %d not available.\n",
1236 current->pic_parameter_set_id);
1237 return AVERROR_INVALIDDATA;
1238 }
1239 h264->active_pps = pps;
1240
1241 sps = h264->sps[pps->seq_parameter_set_id];
1242 if (!sps) {
1243 av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
1244 pps->seq_parameter_set_id);
1245 return AVERROR_INVALIDDATA;
1246 }
1247 h264->active_sps = sps;
1248
1249 if (sps->separate_colour_plane_flag)
1250 u(2, colour_plane_id, 0, 2);
1251
1252 ub(sps->log2_max_frame_num_minus4 + 4, frame_num);
1253
1254 if (!sps->frame_mbs_only_flag) {
1255 flag(field_pic_flag);
1256 if (current->field_pic_flag)
1257 flag(bottom_field_flag);
1258 else
1259 infer(bottom_field_flag, 0);
1260 } else {
1261 infer(field_pic_flag, 0);
1262 infer(bottom_field_flag, 0);
1263 }
1264
1265 if (idr_pic_flag)
1266 ue(idr_pic_id, 0, 65535);
1267
1268 if (sps->pic_order_cnt_type == 0) {
1269 ub(sps->log2_max_pic_order_cnt_lsb_minus4 + 4, pic_order_cnt_lsb);
1270 if (pps->bottom_field_pic_order_in_frame_present_flag &&
1271 !current->field_pic_flag)
1272 se(delta_pic_order_cnt_bottom, INT32_MIN + 1, INT32_MAX);
1273
1274 } else if (sps->pic_order_cnt_type == 1) {
1275 if (!sps->delta_pic_order_always_zero_flag) {
1276 se(delta_pic_order_cnt[0], INT32_MIN + 1, INT32_MAX);
1277 if (pps->bottom_field_pic_order_in_frame_present_flag &&
1278 !current->field_pic_flag)
1279 se(delta_pic_order_cnt[1], INT32_MIN + 1, INT32_MAX);
1280 else
1281 infer(delta_pic_order_cnt[1], 0);
1282 } else {
1283 infer(delta_pic_order_cnt[0], 0);
1284 infer(delta_pic_order_cnt[1], 0);
1285 }
1286 }
1287
1288 if (pps->redundant_pic_cnt_present_flag)
1289 ue(redundant_pic_cnt, 0, 127);
1290 else
1291 infer(redundant_pic_cnt, 0);
1292
1293 if (current->nal_unit_header.nal_unit_type != H264_NAL_AUXILIARY_SLICE
1294 && !current->redundant_pic_cnt)
1295 h264->last_slice_nal_unit_type =
1296 current->nal_unit_header.nal_unit_type;
1297
1298 if (slice_type_b)
1299 flag(direct_spatial_mv_pred_flag);
1300
1301 if (slice_type_p || slice_type_sp || slice_type_b) {
1302 flag(num_ref_idx_active_override_flag);
1303 if (current->num_ref_idx_active_override_flag) {
1304 ue(num_ref_idx_l0_active_minus1, 0, 31);
1305 if (slice_type_b)
1306 ue(num_ref_idx_l1_active_minus1, 0, 31);
1307 } else {
1308 infer(num_ref_idx_l0_active_minus1,
1309 pps->num_ref_idx_l0_default_active_minus1);
1310 infer(num_ref_idx_l1_active_minus1,
1311 pps->num_ref_idx_l1_default_active_minus1);
1312 }
1313 }
1314
1315 if (current->nal_unit_header.nal_unit_type == 20 ||
1316 current->nal_unit_header.nal_unit_type == 21) {
1317 av_log(ctx->log_ctx, AV_LOG_ERROR, "MVC / 3DAVC not supported.\n");
1318 return AVERROR_PATCHWELCOME;
1319 } else {
1320 CHECK(FUNC(ref_pic_list_modification)(ctx, rw, current));
1321 }
1322
1323 if ((pps->weighted_pred_flag && (slice_type_p || slice_type_sp)) ||
1324 (pps->weighted_bipred_idc == 1 && slice_type_b)) {
1325 CHECK(FUNC(pred_weight_table)(ctx, rw, current));
1326 }
1327
1328 if (current->nal_unit_header.nal_ref_idc != 0) {
1329 CHECK(FUNC(dec_ref_pic_marking)(ctx, rw, current, idr_pic_flag));
1330 }
1331
1332 if (pps->entropy_coding_mode_flag &&
1333 !slice_type_i && !slice_type_si) {
1334 ue(cabac_init_idc, 0, 2);
1335 }
1336
1337 se(slice_qp_delta, - 51 - 6 * sps->bit_depth_luma_minus8,
1338 + 51 + 6 * sps->bit_depth_luma_minus8);
1339 if (slice_type_sp || slice_type_si) {
1340 if (slice_type_sp)
1341 flag(sp_for_switch_flag);
1342 se(slice_qs_delta, -51, +51);
1343 }
1344
1345 if (pps->deblocking_filter_control_present_flag) {
1346 ue(disable_deblocking_filter_idc, 0, 2);
1347 if (current->disable_deblocking_filter_idc != 1) {
1348 se(slice_alpha_c0_offset_div2, -6, +6);
1349 se(slice_beta_offset_div2, -6, +6);
1350 } else {
1351 infer(slice_alpha_c0_offset_div2, 0);
1352 infer(slice_beta_offset_div2, 0);
1353 }
1354 } else {
1355 infer(disable_deblocking_filter_idc, 0);
1356 infer(slice_alpha_c0_offset_div2, 0);
1357 infer(slice_beta_offset_div2, 0);
1358 }
1359
1360 if (pps->num_slice_groups_minus1 > 0 &&
1361 pps->slice_group_map_type >= 3 &&
1362 pps->slice_group_map_type <= 5) {
1363 unsigned int pic_size, max, bits;
1364
1365 pic_size = (sps->pic_width_in_mbs_minus1 + 1) *
1366 (sps->pic_height_in_map_units_minus1 + 1);
1367 max = (pic_size + pps->slice_group_change_rate_minus1) /
1368 (pps->slice_group_change_rate_minus1 + 1);
1369 bits = av_ceil_log2(max + 1);
1370
1371 u(bits, slice_group_change_cycle, 0, max);
1372 }
1373
1374 if (pps->entropy_coding_mode_flag) {
1375 while (byte_alignment(rw))
1376 fixed(1, cabac_alignment_one_bit, 1);
1377 }
1378
1379 return 0;
1380 }
1381
FUNC(filler)1382 static int FUNC(filler)(CodedBitstreamContext *ctx, RWContext *rw,
1383 H264RawFiller *current)
1384 {
1385 int err;
1386
1387 HEADER("Filler Data");
1388
1389 CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
1390 1 << H264_NAL_FILLER_DATA));
1391
1392 #ifdef READ
1393 while (show_bits(rw, 8) == 0xff) {
1394 fixed(8, ff_byte, 0xff);
1395 ++current->filler_size;
1396 }
1397 #else
1398 {
1399 uint32_t i;
1400 for (i = 0; i < current->filler_size; i++)
1401 fixed(8, ff_byte, 0xff);
1402 }
1403 #endif
1404
1405 CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
1406
1407 return 0;
1408 }
1409
FUNC(end_of_sequence)1410 static int FUNC(end_of_sequence)(CodedBitstreamContext *ctx, RWContext *rw,
1411 H264RawNALUnitHeader *current)
1412 {
1413 HEADER("End of Sequence");
1414
1415 return FUNC(nal_unit_header)(ctx, rw, current,
1416 1 << H264_NAL_END_SEQUENCE);
1417 }
1418
FUNC(end_of_stream)1419 static int FUNC(end_of_stream)(CodedBitstreamContext *ctx, RWContext *rw,
1420 H264RawNALUnitHeader *current)
1421 {
1422 HEADER("End of Stream");
1423
1424 return FUNC(nal_unit_header)(ctx, rw, current,
1425 1 << H264_NAL_END_STREAM);
1426 }
1427