lavc: Add coded bitstream read/write support for H.264
[libav.git] / libavcodec / cbs_h264_syntax_template.c
1 /*
2 * This file is part of Libav.
3 *
4 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 static int FUNC(rbsp_trailing_bits)(CodedBitstreamContext *ctx, RWContext *rw)
20 {
21 int err;
22 av_unused int one = 1, zero = 0;
23 xu(1, rbsp_stop_one_bit, one, 1, 1);
24 while (byte_alignment(rw) != 0)
25 xu(1, rbsp_alignment_zero_bit, zero, 0, 0);
26
27 return 0;
28 }
29
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 u(1, forbidden_zero_bit, 0, 0);
37 u(2, nal_ref_idc, 0, 3);
38 u(5, nal_unit_type, 0, 31);
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
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 xse(delta_scale, current->delta_scale[i], -128, +127);
80 scale = (scale + current->delta_scale[i] + 256) % 256;
81 if (scale == 0)
82 break;
83 }
84
85 return 0;
86 }
87
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 u(4, bit_rate_scale, 0, 15);
95 u(4, cpb_size_scale, 0, 15);
96
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);
100 flag(cbr_flag[i]);
101 }
102
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);
107
108 return 0;
109 }
110
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 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);
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 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);
140 }
141 } else {
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);
147 }
148
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);
153 } else {
154 infer(chroma_sample_loc_type_top_field, 0);
155 infer(chroma_sample_loc_type_bottom_field, 0);
156 }
157
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);
163 } else {
164 infer(fixed_frame_rate_flag, 0);
165 }
166
167 flag(nal_hrd_parameters_present_flag);
168 if (current->nal_hrd_parameters_present_flag)
169 CHECK(FUNC(hrd_parameters)(ctx, rw, &current->nal_hrd_parameters));
170
171 flag(vcl_hrd_parameters_present_flag);
172 if (current->vcl_hrd_parameters_present_flag)
173 CHECK(FUNC(hrd_parameters)(ctx, rw, &current->vcl_hrd_parameters));
174
175 if (current->nal_hrd_parameters_present_flag ||
176 current->vcl_hrd_parameters_present_flag)
177 flag(low_delay_hrd_flag);
178 else
179 infer(low_delay_hrd_flag, 1 - current->fixed_frame_rate_flag);
180
181 flag(pic_struct_present_flag);
182
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);
192 } else {
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);
198
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);
205 } else {
206 infer(max_num_reorder_frames, H264_MAX_DPB_FRAMES);
207 infer(max_dec_frame_buffering, H264_MAX_DPB_FRAMES);
208 }
209 }
210
211 return 0;
212 }
213
214 static int FUNC(sps)(CodedBitstreamContext *ctx, RWContext *rw,
215 H264RawSPS *current)
216 {
217 int err, i;
218
219 HEADER("Sequence Parameter Set");
220
221 CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header,
222 1 << H264_NAL_SPS));
223
224 u(8, profile_idc, 0, 255);
225
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);
232
233 u(2, reserved_zero_2bits, 0, 0);
234
235 u(8, level_idc, 0, 255);
236
237 ue(seq_parameter_set_id, 0, 31);
238
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);
245
246 if (current->chroma_format_idc == 3)
247 flag(separate_colour_plane_flag);
248 else
249 infer(separate_colour_plane_flag, 0);
250
251 ue(bit_depth_luma_minus8, 0, 6);
252 ue(bit_depth_chroma_minus8, 0, 6);
253
254 flag(qpprime_y_zero_transform_bypass_flag);
255
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]) {
261 if (i < 6)
262 CHECK(FUNC(scaling_list)(ctx, rw,
263 &current->scaling_list_4x4[i],
264 16));
265 else
266 CHECK(FUNC(scaling_list)(ctx, rw,
267 &current->scaling_list_8x8[i - 6],
268 64));
269 }
270 }
271 }
272 } else {
273 infer(chroma_format_idc, current->profile_idc == 183 ? 0 : 1);
274
275 infer(separate_colour_plane_flag, 0);
276 infer(bit_depth_luma_minus8, 0);
277 infer(bit_depth_chroma_minus8, 0);
278 }
279
280 ue(log2_max_frame_num_minus4, 0, 12);
281 ue(pic_order_cnt_type, 0, 2);
282
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);
290
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);
293 }
294
295 ue(max_num_ref_frames, 0, H264_MAX_DPB_FRAMES);
296 flag(gaps_in_frame_num_allowed_flag);
297
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);
300
301 flag(frame_mbs_only_flag);
302 if (!current->frame_mbs_only_flag)
303 flag(mb_adaptive_frame_field_flag);
304
305 flag(direct_8x8_inference_flag);
306
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);
313 }
314
315 flag(vui_parameters_present_flag);
316 if (current->vui_parameters_present_flag)
317 CHECK(FUNC(vui_parameters)(ctx, rw, &current->vui, current));
318
319 CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
320
321 return 0;
322 }
323
324 static int FUNC(sps_extension)(CodedBitstreamContext *ctx, RWContext *rw,
325 H264RawSPSExtension *current)
326 {
327 int err;
328
329 HEADER("Sequence Parameter Set Extension");
330
331 CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header,
332 1 << H264_NAL_SPS_EXT));
333
334 ue(seq_parameter_set_id, 0, 31);
335
336 ue(aux_format_idc, 0, 3);
337
338 if (current->aux_format_idc != 0) {
339 int bits;
340
341 ue(bit_depth_aux_minus8, 0, 4);
342 flag(alpha_incr_flag);
343
344 bits = current->bit_depth_aux_minus8 + 9;
345 u(bits, alpha_opaque_value, 0, (1 << bits) - 1);
346 u(bits, alpha_transparent_value, 0, (1 << bits) - 1);
347 }
348
349 flag(additional_extension_flag);
350
351 CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
352
353 return 0;
354 }
355
356 static int FUNC(pps)(CodedBitstreamContext *ctx, RWContext *rw,
357 H264RawPPS *current)
358 {
359 CodedBitstreamH264Context *h264 = ctx->priv_data;
360 const H264RawSPS *sps;
361 int err, i;
362
363 HEADER("Picture Parameter Set");
364
365 CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header,
366 1 << H264_NAL_PPS));
367
368 ue(pic_parameter_set_id, 0, 255);
369 ue(seq_parameter_set_id, 0, 31);
370
371 sps = h264->sps[current->seq_parameter_set_id];
372 if (!sps) {
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;
376 }
377
378 flag(entropy_coding_mode_flag);
379 flag(bottom_field_pic_order_in_frame_present_flag);
380
381 ue(num_slice_groups_minus1, 0, 7);
382 if (current->num_slice_groups_minus1 > 0) {
383 unsigned int pic_size;
384 int iGroup;
385
386 pic_size = (sps->pic_width_in_mbs_minus1 + 1) *
387 (sps->pic_height_in_map_units_minus1 + 1);
388
389 ue(slice_group_map_type, 0, 6);
390
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);
394
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);
399 }
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);
407 for (i = 0; i <= current->pic_size_in_map_units_minus1; i++)
408 u(av_log2(2 * current->num_slice_groups_minus1 + 1),
409 slice_group_id[i], 0, current->num_slice_groups_minus1);
410 }
411 }
412
413 ue(num_ref_idx_l0_default_active_minus1, 0, 31);
414 ue(num_ref_idx_l1_default_active_minus1, 0, 31);
415
416 flag(weighted_pred_flag);
417 u(2, weighted_bipred_idc, 0, 2);
418
419 se(pic_init_qp_minus26, -26 - 6 * sps->bit_depth_luma_minus8, +25);
420 se(pic_init_qs_minus26, -26, +25);
421 se(chroma_qp_index_offset, -12, +12);
422
423 flag(deblocking_filter_control_present_flag);
424 flag(constrained_intra_pred_flag);
425 flag(redundant_pic_cnt_present_flag);
426
427 if (more_rbsp_data(current->more_rbsp_data))
428 {
429 flag(transform_8x8_mode_flag);
430
431 flag(pic_scaling_matrix_present_flag);
432 if (current->pic_scaling_matrix_present_flag) {
433 for (i = 0; i < 6 + (((sps->chroma_format_idc != 3) ? 2 : 6) *
434 current->transform_8x8_mode_flag); i++) {
435 flag(pic_scaling_list_present_flag[i]);
436 if (current->pic_scaling_list_present_flag[i]) {
437 if (i < 6)
438 CHECK(FUNC(scaling_list)(ctx, rw,
439 &current->scaling_list_4x4[i],
440 16));
441 else
442 CHECK(FUNC(scaling_list)(ctx, rw,
443 &current->scaling_list_8x8[i - 6],
444 64));
445 }
446 }
447 }
448
449 se(second_chroma_qp_index_offset, -12, +12);
450 } else {
451 infer(transform_8x8_mode_flag, 0);
452 infer(pic_scaling_matrix_present_flag, 0);
453 infer(second_chroma_qp_index_offset, current->chroma_qp_index_offset);
454 }
455
456 CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
457
458 return 0;
459 }
460
461 static int FUNC(sei_buffering_period)(CodedBitstreamContext *ctx, RWContext *rw,
462 H264RawSEIBufferingPeriod *current)
463 {
464 CodedBitstreamH264Context *h264 = ctx->priv_data;
465 const H264RawSPS *sps;
466 int err, i, length;
467
468 ue(seq_parameter_set_id, 0, 31);
469
470 sps = h264->sps[current->seq_parameter_set_id];
471 if (!sps) {
472 av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
473 current->seq_parameter_set_id);
474 return AVERROR_INVALIDDATA;
475 }
476 h264->active_sps = sps;
477
478 if (sps->vui.nal_hrd_parameters_present_flag) {
479 for (i = 0; i <= sps->vui.nal_hrd_parameters.cpb_cnt_minus1; i++) {
480 length = sps->vui.nal_hrd_parameters.initial_cpb_removal_delay_length_minus1 + 1;
481 xu(length, initial_cpb_removal_delay[SchedSelIdx],
482 current->nal.initial_cpb_removal_delay[i],
483 0, (1 << (uint64_t)length) - 1);
484 xu(length, initial_cpb_removal_delay_offset[SchedSelIdx],
485 current->nal.initial_cpb_removal_delay_offset[i],
486 0, (1 << (uint64_t)length) - 1);
487 }
488 }
489
490 if (sps->vui.vcl_hrd_parameters_present_flag) {
491 for (i = 0; i <= sps->vui.vcl_hrd_parameters.cpb_cnt_minus1; i++) {
492 length = sps->vui.vcl_hrd_parameters.initial_cpb_removal_delay_length_minus1 + 1;
493 xu(length, initial_cpb_removal_delay[SchedSelIdx],
494 current->vcl.initial_cpb_removal_delay[i],
495 0, (1 << (uint64_t)length) - 1);
496 xu(length, initial_cpb_removal_delay_offset[SchedSelIdx],
497 current->vcl.initial_cpb_removal_delay_offset[i],
498 0, (1 << (uint64_t)length) - 1);
499 }
500 }
501
502 return 0;
503 }
504
505 static int FUNC(sei_pic_timestamp)(CodedBitstreamContext *ctx, RWContext *rw,
506 H264RawSEIPicTimestamp *current)
507 {
508 CodedBitstreamH264Context *h264 = ctx->priv_data;
509 const H264RawSPS *sps;
510 uint8_t time_offset_length;
511 int err;
512
513 u(2, ct_type, 0, 2);
514 flag(nuit_field_based_flag);
515 u(5, counting_type, 0, 6);
516 flag(full_timestamp_flag);
517 flag(discontinuity_flag);
518 flag(cnt_dropped_flag);
519 u(8, n_frames, 0, 255);
520 if (current->full_timestamp_flag) {
521 u(6, seconds_value, 0, 59);
522 u(6, minutes_value, 0, 59);
523 u(5, hours_value, 0, 23);
524 } else {
525 flag(seconds_flag);
526 if (current->seconds_flag) {
527 u(6, seconds_value, 0, 59);
528 flag(minutes_flag);
529 if (current->minutes_flag) {
530 u(6, minutes_value, 0, 59);
531 flag(hours_flag);
532 if (current->hours_flag)
533 u(5, hours_value, 0, 23);
534 }
535 }
536 }
537
538 sps = h264->active_sps;
539 if (sps->vui.nal_hrd_parameters_present_flag)
540 time_offset_length = sps->vui.nal_hrd_parameters.time_offset_length;
541 else if (sps->vui.vcl_hrd_parameters_present_flag)
542 time_offset_length = sps->vui.vcl_hrd_parameters.time_offset_length;
543 else
544 time_offset_length = 24;
545
546 if (time_offset_length > 0)
547 u(time_offset_length, time_offset,
548 0, (1 << (uint64_t)time_offset_length) - 1);
549 else
550 infer(time_offset, 0);
551
552 return 0;
553 }
554
555 static int FUNC(sei_pic_timing)(CodedBitstreamContext *ctx, RWContext *rw,
556 H264RawSEIPicTiming *current)
557 {
558 CodedBitstreamH264Context *h264 = ctx->priv_data;
559 const H264RawSPS *sps;
560 int err;
561
562 sps = h264->active_sps;
563 if (!sps) {
564 av_log(ctx->log_ctx, AV_LOG_ERROR,
565 "No active SPS for pic_timing.\n");
566 return AVERROR_INVALIDDATA;
567 }
568
569 if (sps->vui.nal_hrd_parameters_present_flag ||
570 sps->vui.vcl_hrd_parameters_present_flag) {
571 const H264RawHRD *hrd;
572
573 if (sps->vui.nal_hrd_parameters_present_flag)
574 hrd = &sps->vui.nal_hrd_parameters;
575 else if (sps->vui.vcl_hrd_parameters_present_flag)
576 hrd = &sps->vui.vcl_hrd_parameters;
577 else {
578 av_log(ctx->log_ctx, AV_LOG_ERROR,
579 "No HRD parameters for pic_timing.\n");
580 return AVERROR_INVALIDDATA;
581 }
582
583 u(hrd->cpb_removal_delay_length_minus1 + 1, cpb_removal_delay,
584 0, (1 << (uint64_t)hrd->cpb_removal_delay_length_minus1) + 1);
585 u(hrd->dpb_output_delay_length_minus1 + 1, dpb_output_delay,
586 0, (1 << (uint64_t)hrd->dpb_output_delay_length_minus1) + 1);
587 }
588
589 if (sps->vui.pic_struct_present_flag) {
590 static const int num_clock_ts[9] = {
591 1, 1, 1, 2, 2, 3, 3, 2, 3
592 };
593 int i;
594
595 u(4, pic_struct, 0, 8);
596 if (current->pic_struct > 8)
597 return AVERROR_INVALIDDATA;
598
599 for (i = 0; i < num_clock_ts[current->pic_struct]; i++) {
600 flag(clock_timestamp_flag[i]);
601 if (current->clock_timestamp_flag[i])
602 CHECK(FUNC(sei_pic_timestamp)(ctx, rw, &current->timestamp[i]));
603 }
604 }
605
606 return 0;
607 }
608
609 static int FUNC(sei_user_data_registered)(CodedBitstreamContext *ctx, RWContext *rw,
610 H264RawSEIUserDataRegistered *current,
611 uint32_t *payload_size)
612 {
613 int err, i, j;
614
615 u(8, itu_t_t35_country_code, 0x00, 0xff);
616 if (current->itu_t_t35_country_code != 0xff)
617 i = 1;
618 else {
619 u(8, itu_t_t35_country_code_extension_byte, 0x00, 0xff);
620 i = 2;
621 }
622
623 #ifdef READ
624 if (*payload_size < i) {
625 av_log(ctx->log_ctx, AV_LOG_ERROR,
626 "Invalid SEI user data registered payload.\n");
627 return AVERROR_INVALIDDATA;
628 }
629 current->data_length = *payload_size - i;
630 #else
631 *payload_size = i + current->data_length;
632 #endif
633
634 allocate(current->data, current->data_length);
635 for (j = 0; j < current->data_length; j++)
636 xu(8, itu_t_t35_payload_byte, current->data[j], 0x00, 0xff);
637
638 return 0;
639 }
640
641 static int FUNC(sei_user_data_unregistered)(CodedBitstreamContext *ctx, RWContext *rw,
642 H264RawSEIUserDataUnregistered *current,
643 uint32_t *payload_size)
644 {
645 int err, i;
646
647 #ifdef READ
648 if (*payload_size < 16) {
649 av_log(ctx->log_ctx, AV_LOG_ERROR,
650 "Invalid SEI user data unregistered payload.\n");
651 return AVERROR_INVALIDDATA;
652 }
653 current->data_length = *payload_size - 16;
654 #else
655 *payload_size = 16 + current->data_length;
656 #endif
657
658 for (i = 0; i < 16; i++) {
659 xu(8, uuid_iso_iec_11578,
660 current->uuid_iso_iec_11578[i], 0x00, 0xff);
661 }
662
663 allocate(current->data, current->data_length);
664
665 for (i = 0; i < current->data_length; i++)
666 xu(8, user_data_payload_byte, current->data[i], 0x00, 0xff);
667
668 return 0;
669 }
670
671 static int FUNC(sei_recovery_point)(CodedBitstreamContext *ctx, RWContext *rw,
672 H264RawSEIRecoveryPoint *current)
673 {
674 int err;
675
676 ue(recovery_frame_cnt, 0, 65535);
677 flag(exact_match_flag);
678 flag(broken_link_flag);
679 u(2, changing_slice_group_idc, 0, 2);
680
681 return 0;
682 }
683
684 static int FUNC(sei_display_orientation)(CodedBitstreamContext *ctx, RWContext *rw,
685 H264RawSEIDisplayOrientation *current)
686 {
687 int err;
688
689 flag(display_orientation_cancel_flag);
690 if (!current->display_orientation_cancel_flag) {
691 flag(hor_flip);
692 flag(ver_flip);
693 u(16, anticlockwise_rotation, 0, 65535);
694 ue(display_orientation_repetition_period, 0, 16384);
695 flag(display_orientation_extension_flag);
696 }
697
698 return 0;
699 }
700
701 static int FUNC(sei_payload)(CodedBitstreamContext *ctx, RWContext *rw,
702 H264RawSEIPayload *current)
703 {
704 int err, i;
705 int start_position, end_position;
706
707 #ifdef READ
708 start_position = bitstream_tell(rw);
709 #else
710 start_position = put_bits_count(rw);
711 #endif
712
713 switch (current->payload_type) {
714 case H264_SEI_TYPE_BUFFERING_PERIOD:
715 CHECK(FUNC(sei_buffering_period)
716 (ctx, rw, &current->payload.buffering_period));
717 break;
718 case H264_SEI_TYPE_PIC_TIMING:
719 CHECK(FUNC(sei_pic_timing)
720 (ctx, rw, &current->payload.pic_timing));
721 break;
722 case H264_SEI_TYPE_FILLER_PAYLOAD:
723 {
724 av_unused int ff_byte = 0xff;
725 for (i = 0; i < current->payload_size; i++)
726 xu(8, ff_byte, ff_byte, 0xff, 0xff);
727 }
728 break;
729 case H264_SEI_TYPE_USER_DATA_REGISTERED:
730 CHECK(FUNC(sei_user_data_registered)
731 (ctx, rw, &current->payload.user_data_registered, &current->payload_size));
732 break;
733 case H264_SEI_TYPE_USER_DATA_UNREGISTERED:
734 CHECK(FUNC(sei_user_data_unregistered)
735 (ctx, rw, &current->payload.user_data_unregistered, &current->payload_size));
736 break;
737 case H264_SEI_TYPE_RECOVERY_POINT:
738 CHECK(FUNC(sei_recovery_point)
739 (ctx, rw, &current->payload.recovery_point));
740 break;
741 case H264_SEI_TYPE_DISPLAY_ORIENTATION:
742 CHECK(FUNC(sei_display_orientation)
743 (ctx, rw, &current->payload.display_orientation));
744 break;
745 default:
746 {
747 allocate(current->payload.other.data, current->payload_size);
748 for (i = 0; i < current->payload_size; i++)
749 xu(8, payload_byte, current->payload.other.data[i], 0, 255);
750 }
751 }
752
753 if (byte_alignment(rw)) {
754 av_unused int one = 1, zero = 0;
755 xu(1, bit_equal_to_one, one, 1, 1);
756 while (byte_alignment(rw))
757 xu(1, bit_equal_to_zero, zero, 0, 0);
758 }
759
760 #ifdef READ
761 end_position = bitstream_tell(rw);
762 if (end_position < start_position + 8 * current->payload_size) {
763 av_log(ctx->log_ctx, AV_LOG_ERROR, "Incorrect SEI payload length: "
764 "header %d bits, actually %d bits.\n",
765 8 * current->payload_size,
766 end_position - start_position);
767 return AVERROR_INVALIDDATA;
768 }
769 #else
770 end_position = put_bits_count(rw);
771 current->payload_size = (end_position - start_position) / 8;
772 #endif
773
774 return 0;
775 }
776
777 static int FUNC(sei)(CodedBitstreamContext *ctx, RWContext *rw,
778 H264RawSEI *current)
779 {
780 int err, k;
781
782 HEADER("Supplemental Enhancement Information");
783
784 CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header,
785 1 << H264_NAL_SEI));
786
787 #ifdef READ
788 for (k = 0; k < H264_MAX_SEI_PAYLOADS; k++) {
789 uint32_t payload_type = 0;
790 uint32_t payload_size = 0;
791 uint32_t tmp;
792
793 while (bitstream_peek(rw, 8) == 0xff) {
794 xu(8, ff_byte, tmp, 0xff, 0xff);
795 payload_type += 255;
796 }
797 xu(8, last_payload_type_byte, tmp, 0, 254);
798 payload_type += tmp;
799
800 while (bitstream_peek(rw, 8) == 0xff) {
801 xu(8, ff_byte, tmp, 0xff, 0xff);
802 payload_size += 255;
803 }
804 xu(8, last_payload_size_byte, tmp, 0, 254);
805 payload_size += tmp;
806
807 current->payload[k].payload_type = payload_type;
808 current->payload[k].payload_size = payload_size;
809
810 CHECK(FUNC(sei_payload)(ctx, rw, &current->payload[k]));
811
812 if (!cbs_h2645_read_more_rbsp_data(rw))
813 break;
814 }
815 if (k >= H264_MAX_SEI_PAYLOADS) {
816 av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many payloads in "
817 "SEI message: found %d.\n", k);
818 return AVERROR_INVALIDDATA;
819 }
820 current->payload_count = k + 1;
821 #else
822 for (k = 0; k < current->payload_count; k++) {
823 PutBitContext start_state;
824 uint32_t tmp;
825 int need_size, i;
826
827 // Somewhat clumsy: we write the payload twice when
828 // we don't know the size in advance. This will mess
829 // with trace output, but is otherwise harmless.
830 start_state = *rw;
831 need_size = !current->payload[k].payload_size;
832 for (i = 0; i < 1 + need_size; i++) {
833 *rw = start_state;
834
835 tmp = current->payload[k].payload_type;
836 while (tmp >= 255) {
837 xu(8, ff_byte, 0xff, 0xff, 0xff);
838 tmp -= 255;
839 }
840 xu(8, last_payload_type_byte, tmp, 0, 254);
841
842 tmp = current->payload[k].payload_size;
843 while (tmp >= 255) {
844 xu(8, ff_byte, 0xff, 0xff, 0xff);
845 tmp -= 255;
846 }
847 xu(8, last_payload_size_byte, tmp, 0, 254);
848
849 CHECK(FUNC(sei_payload)(ctx, rw, &current->payload[k]));
850 }
851 }
852 #endif
853
854 CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
855
856 return 0;
857 }
858
859 static int FUNC(aud)(CodedBitstreamContext *ctx, RWContext *rw,
860 H264RawAUD *current)
861 {
862 int err;
863
864 HEADER("Access Unit Delimiter");
865
866 CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header,
867 1 << H264_NAL_AUD));
868
869 u(3, primary_pic_type, 0, 7);
870
871 CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
872
873 return 0;
874 }
875
876 static int FUNC(ref_pic_list_modification)(CodedBitstreamContext *ctx, RWContext *rw,
877 H264RawSliceHeader *current)
878 {
879 CodedBitstreamH264Context *h264 = ctx->priv_data;
880 const H264RawSPS *sps = h264->active_sps;
881 int err, i, mopn;
882
883 if (current->slice_type % 5 != 2 &&
884 current->slice_type % 5 != 4) {
885 flag(ref_pic_list_modification_flag_l0);
886 if (current->ref_pic_list_modification_flag_l0) {
887 for (i = 0; i < H264_MAX_RPLM_COUNT; i++) {
888 xue(modification_of_pic_nums_idc,
889 current->rplm_l0[i].modification_of_pic_nums_idc, 0, 3);
890
891 mopn = current->rplm_l0[i].modification_of_pic_nums_idc;
892 if (mopn == 3)
893 break;
894
895 if (mopn == 0 || mopn == 1)
896 xue(abs_diff_pic_num_minus1,
897 current->rplm_l0[i].abs_diff_pic_num_minus1,
898 0, (1 + current->field_pic_flag) *
899 (1 << (sps->log2_max_frame_num_minus4 + 4)));
900 else if (mopn == 2)
901 xue(long_term_pic_num,
902 current->rplm_l0[i].long_term_pic_num,
903 0, sps->max_num_ref_frames - 1);
904 }
905 }
906 }
907
908 if (current->slice_type % 5 == 1) {
909 flag(ref_pic_list_modification_flag_l1);
910 if (current->ref_pic_list_modification_flag_l1) {
911 for (i = 0; i < H264_MAX_RPLM_COUNT; i++) {
912 xue(modification_of_pic_nums_idc,
913 current->rplm_l1[i].modification_of_pic_nums_idc, 0, 3);
914
915 mopn = current->rplm_l1[i].modification_of_pic_nums_idc;
916 if (mopn == 3)
917 break;
918
919 if (mopn == 0 || mopn == 1)
920 xue(abs_diff_pic_num_minus1,
921 current->rplm_l1[i].abs_diff_pic_num_minus1,
922 0, (1 + current->field_pic_flag) *
923 (1 << (sps->log2_max_frame_num_minus4 + 4)));
924 else if (mopn == 2)
925 xue(long_term_pic_num,
926 current->rplm_l1[i].long_term_pic_num,
927 0, sps->max_num_ref_frames - 1);
928 }
929 }
930 }
931
932 return 0;
933 }
934
935 static int FUNC(pred_weight_table)(CodedBitstreamContext *ctx, RWContext *rw,
936 H264RawSliceHeader *current)
937 {
938 CodedBitstreamH264Context *h264 = ctx->priv_data;
939 const H264RawSPS *sps = h264->active_sps;
940 int chroma;
941 int err, i, j;
942
943 ue(luma_log2_weight_denom, 0, 7);
944
945 chroma = !sps->separate_colour_plane_flag && sps->chroma_format_idc != 0;
946 if (chroma)
947 ue(chroma_log2_weight_denom, 0, 7);
948
949 for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) {
950 flag(luma_weight_l0_flag[i]);
951 if (current->luma_weight_l0_flag[i]) {
952 se(luma_weight_l0[i], -128, +127);
953 se(luma_offset_l0[i], -128, +127);
954 }
955 if (chroma) {
956 flag(chroma_weight_l0_flag[i]);
957 if (current->chroma_weight_l0_flag[i]) {
958 for (j = 0; j < 2; j++) {
959 se(chroma_weight_l0[i][j], -128, +127);
960 se(chroma_offset_l0[i][j], -128, +127);
961 }
962 }
963 }
964 }
965
966 if (current->slice_type % 5 == 1) {
967 for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) {
968 flag(luma_weight_l1_flag[i]);
969 if (current->luma_weight_l1_flag[i]) {
970 se(luma_weight_l1[i], -128, +127);
971 se(luma_offset_l1[i], -128, +127);
972 }
973 if (chroma) {
974 flag(chroma_weight_l1_flag[i]);
975 if (current->chroma_weight_l1_flag[i]) {
976 for (j = 0; j < 2; j++) {
977 se(chroma_weight_l1[i][j], -128, +127);
978 se(chroma_offset_l1[i][j], -128, +127);
979 }
980 }
981 }
982 }
983 }
984
985 return 0;
986 }
987
988 static int FUNC(dec_ref_pic_marking)(CodedBitstreamContext *ctx, RWContext *rw,
989 H264RawSliceHeader *current, int idr_pic_flag)
990 {
991 CodedBitstreamH264Context *h264 = ctx->priv_data;
992 const H264RawSPS *sps = h264->active_sps;
993 int err, i;
994 uint32_t mmco;
995
996 if (idr_pic_flag) {
997 flag(no_output_of_prior_pics_flag);
998 flag(long_term_reference_flag);
999 } else {
1000 flag(adaptive_ref_pic_marking_mode_flag);
1001 if (current->adaptive_ref_pic_marking_mode_flag) {
1002 for (i = 0; i < H264_MAX_MMCO_COUNT; i++) {
1003 xue(memory_management_control_operation,
1004 current->mmco[i].memory_management_control_operation,
1005 0, 6);
1006
1007 mmco = current->mmco[i].memory_management_control_operation;
1008 if (mmco == 0)
1009 break;
1010
1011 if (mmco == 1 || mmco == 3)
1012 xue(difference_of_pic_nums_minus1,
1013 current->mmco[i].difference_of_pic_nums_minus1,
1014 0, INT32_MAX);
1015 if (mmco == 2)
1016 xue(long_term_pic_num,
1017 current->mmco[i].long_term_pic_num,
1018 0, sps->max_num_ref_frames - 1);
1019 if (mmco == 3 || mmco == 6)
1020 xue(long_term_frame_idx,
1021 current->mmco[i].long_term_frame_idx,
1022 0, sps->max_num_ref_frames - 1);
1023 if (mmco == 4)
1024 xue(max_long_term_frame_idx_plus1,
1025 current->mmco[i].max_long_term_frame_idx_plus1,
1026 0, sps->max_num_ref_frames);
1027 }
1028 if (i == H264_MAX_MMCO_COUNT) {
1029 av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many "
1030 "memory management control operations.\n");
1031 return AVERROR_INVALIDDATA;
1032 }
1033 }
1034 }
1035
1036 return 0;
1037 }
1038
1039 static int FUNC(slice_header)(CodedBitstreamContext *ctx, RWContext *rw,
1040 H264RawSliceHeader *current)
1041 {
1042 CodedBitstreamH264Context *h264 = ctx->priv_data;
1043 const H264RawSPS *sps;
1044 const H264RawPPS *pps;
1045 int err;
1046 int idr_pic_flag;
1047 int slice_type_i, slice_type_p, slice_type_b;
1048 int slice_type_si, slice_type_sp;
1049
1050 HEADER("Slice Header");
1051
1052 CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header,
1053 1 << H264_NAL_SLICE |
1054 1 << H264_NAL_IDR_SLICE |
1055 1 << H264_NAL_AUXILIARY_SLICE));
1056
1057 if (current->nal_unit_header.nal_unit_type == H264_NAL_AUXILIARY_SLICE) {
1058 if (!h264->last_slice_nal_unit_type) {
1059 av_log(ctx->log_ctx, AV_LOG_ERROR, "Auxiliary slice "
1060 "is not decodable without the main picture "
1061 "in the same access unit.\n");
1062 return AVERROR_INVALIDDATA;
1063 }
1064 } else {
1065 h264->last_slice_nal_unit_type =
1066 current->nal_unit_header.nal_unit_type;
1067 }
1068 idr_pic_flag = h264->last_slice_nal_unit_type == H264_NAL_IDR_SLICE;
1069
1070 ue(first_mb_in_slice, 0, H264_MAX_MB_PIC_SIZE - 1);
1071 ue(slice_type, 0, 9);
1072
1073 slice_type_i = current->slice_type % 5 == 2;
1074 slice_type_p = current->slice_type % 5 == 0;
1075 slice_type_b = current->slice_type % 5 == 1;
1076 slice_type_si = current->slice_type % 5 == 4;
1077 slice_type_sp = current->slice_type % 5 == 3;
1078
1079 if (idr_pic_flag && !(slice_type_i || slice_type_si)) {
1080 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid slice type %d "
1081 "for IDR picture.\n", current->slice_type);
1082 return AVERROR_INVALIDDATA;
1083 }
1084
1085 ue(pic_parameter_set_id, 0, 255);
1086
1087 pps = h264->pps[current->pic_parameter_set_id];
1088 if (!pps) {
1089 av_log(ctx->log_ctx, AV_LOG_ERROR, "PPS id %d not available.\n",
1090 current->pic_parameter_set_id);
1091 return AVERROR_INVALIDDATA;
1092 }
1093 h264->active_pps = pps;
1094
1095 sps = h264->sps[pps->seq_parameter_set_id];
1096 if (!sps) {
1097 av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
1098 pps->seq_parameter_set_id);
1099 return AVERROR_INVALIDDATA;
1100 }
1101 h264->active_sps = sps;
1102
1103 if (sps->separate_colour_plane_flag)
1104 u(2, colour_plane_id, 0, 2);
1105
1106 u(sps->log2_max_frame_num_minus4 + 4, frame_num,
1107 0, (1 << (sps->log2_max_frame_num_minus4 + 4)) - 1);
1108
1109 if (!sps->frame_mbs_only_flag) {
1110 flag(field_pic_flag);
1111 if (current->field_pic_flag)
1112 flag(bottom_field_flag);
1113 else
1114 infer(bottom_field_flag, 0);
1115 } else {
1116 infer(field_pic_flag, 0);
1117 infer(bottom_field_flag, 0);
1118 }
1119
1120 if (idr_pic_flag)
1121 ue(idr_pic_id, 0, 65535);
1122
1123 if (sps->pic_order_cnt_type == 0) {
1124 u(sps->log2_max_pic_order_cnt_lsb_minus4 + 4, pic_order_cnt_lsb,
1125 0, (1 << (sps->log2_max_pic_order_cnt_lsb_minus4 + 4)) - 1);
1126 if (pps->bottom_field_pic_order_in_frame_present_flag &&
1127 !current->field_pic_flag)
1128 se(delta_pic_order_cnt_bottom, INT32_MIN + 1, INT32_MAX);
1129
1130 } else if (sps->pic_order_cnt_type == 1) {
1131 if (!sps->delta_pic_order_always_zero_flag) {
1132 se(delta_pic_order_cnt[0], INT32_MIN + 1, INT32_MAX);
1133 if (pps->bottom_field_pic_order_in_frame_present_flag &&
1134 !current->field_pic_flag)
1135 se(delta_pic_order_cnt[1], INT32_MIN + 1, INT32_MAX);
1136 else
1137 infer(delta_pic_order_cnt[1], 0);
1138 } else {
1139 infer(delta_pic_order_cnt[0], 0);
1140 infer(delta_pic_order_cnt[1], 0);
1141 }
1142 }
1143
1144 if (pps->redundant_pic_cnt_present_flag)
1145 ue(redundant_pic_cnt, 0, 127);
1146
1147 if (slice_type_b)
1148 flag(direct_spatial_mv_pred_flag);
1149
1150 if (slice_type_p || slice_type_sp || slice_type_b) {
1151 flag(num_ref_idx_active_override_flag);
1152 if (current->num_ref_idx_active_override_flag) {
1153 ue(num_ref_idx_l0_active_minus1, 0, 31);
1154 if (slice_type_b)
1155 ue(num_ref_idx_l1_active_minus1, 0, 31);
1156 } else {
1157 infer(num_ref_idx_l0_active_minus1,
1158 pps->num_ref_idx_l0_default_active_minus1);
1159 infer(num_ref_idx_l1_active_minus1,
1160 pps->num_ref_idx_l1_default_active_minus1);
1161 }
1162 }
1163
1164 if (current->nal_unit_header.nal_unit_type == 20 ||
1165 current->nal_unit_header.nal_unit_type == 21) {
1166 av_log(ctx->log_ctx, AV_LOG_ERROR, "MVC / 3DAVC not supported.\n");
1167 return AVERROR_PATCHWELCOME;
1168 } else {
1169 CHECK(FUNC(ref_pic_list_modification)(ctx, rw, current));
1170 }
1171
1172 if ((pps->weighted_pred_flag && (slice_type_p || slice_type_sp)) ||
1173 (pps->weighted_bipred_idc == 1 && slice_type_b)) {
1174 CHECK(FUNC(pred_weight_table)(ctx, rw, current));
1175 }
1176
1177 if (current->nal_unit_header.nal_ref_idc != 0) {
1178 CHECK(FUNC(dec_ref_pic_marking)(ctx, rw, current, idr_pic_flag));
1179 }
1180
1181 if (pps->entropy_coding_mode_flag &&
1182 !slice_type_i && !slice_type_si) {
1183 ue(cabac_init_idc, 0, 2);
1184 }
1185
1186 se(slice_qp_delta, - 51 - 6 * sps->bit_depth_luma_minus8,
1187 + 51 + 6 * sps->bit_depth_luma_minus8);
1188 if (slice_type_sp || slice_type_si) {
1189 if (slice_type_sp)
1190 flag(sp_for_switch_flag);
1191 se(slice_qs_delta, -51, +51);
1192 }
1193
1194 if (pps->deblocking_filter_control_present_flag) {
1195 ue(disable_deblocking_filter_idc, 0, 2);
1196 if (current->disable_deblocking_filter_idc != 1) {
1197 se(slice_alpha_c0_offset_div2, -6, +6);
1198 se(slice_beta_offset_div2, -6, +6);
1199 } else {
1200 infer(slice_alpha_c0_offset_div2, 0);
1201 infer(slice_beta_offset_div2, 0);
1202 }
1203 } else {
1204 infer(disable_deblocking_filter_idc, 0);
1205 infer(slice_alpha_c0_offset_div2, 0);
1206 infer(slice_beta_offset_div2, 0);
1207 }
1208
1209 if (pps->num_slice_groups_minus1 > 0 &&
1210 pps->slice_group_map_type >= 3 &&
1211 pps->slice_group_map_type <= 5) {
1212 unsigned int pic_size, max, bits;
1213
1214 pic_size = (sps->pic_width_in_mbs_minus1 + 1) *
1215 (sps->pic_height_in_map_units_minus1 + 1);
1216 max = (pic_size + pps->slice_group_change_rate_minus1) /
1217 (pps->slice_group_change_rate_minus1 + 1);
1218 bits = av_log2(2 * max - 1);
1219
1220 u(bits, slice_group_change_cycle, 0, max);
1221 }
1222
1223 if (pps->entropy_coding_mode_flag) {
1224 av_unused int one = 1;
1225 while (byte_alignment(rw))
1226 xu(1, cabac_alignment_one_bit, one, 1, 1);
1227 }
1228
1229 return 0;
1230 }