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 SEIMessageState *sei)
516 {
517 CodedBitstreamH264Context *h264 = ctx->priv_data;
518 const H264RawSPS *sps;
519 int err, i, length;
520
521 HEADER("Buffering Period");
522
523 ue(seq_parameter_set_id, 0, 31);
524
525 sps = h264->sps[current->seq_parameter_set_id];
526 if (!sps) {
527 av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
528 current->seq_parameter_set_id);
529 return AVERROR_INVALIDDATA;
530 }
531 h264->active_sps = sps;
532
533 if (sps->vui.nal_hrd_parameters_present_flag) {
534 for (i = 0; i <= sps->vui.nal_hrd_parameters.cpb_cnt_minus1; i++) {
535 length = sps->vui.nal_hrd_parameters.initial_cpb_removal_delay_length_minus1 + 1;
536 xu(length, initial_cpb_removal_delay[SchedSelIdx],
537 current->nal.initial_cpb_removal_delay[i],
538 1, MAX_UINT_BITS(length), 1, i);
539 xu(length, initial_cpb_removal_delay_offset[SchedSelIdx],
540 current->nal.initial_cpb_removal_delay_offset[i],
541 0, MAX_UINT_BITS(length), 1, i);
542 }
543 }
544
545 if (sps->vui.vcl_hrd_parameters_present_flag) {
546 for (i = 0; i <= sps->vui.vcl_hrd_parameters.cpb_cnt_minus1; i++) {
547 length = sps->vui.vcl_hrd_parameters.initial_cpb_removal_delay_length_minus1 + 1;
548 xu(length, initial_cpb_removal_delay[SchedSelIdx],
549 current->vcl.initial_cpb_removal_delay[i],
550 1, MAX_UINT_BITS(length), 1, i);
551 xu(length, initial_cpb_removal_delay_offset[SchedSelIdx],
552 current->vcl.initial_cpb_removal_delay_offset[i],
553 0, MAX_UINT_BITS(length), 1, i);
554 }
555 }
556
557 return 0;
558 }
559
FUNC(sei_pic_timestamp)560 static int FUNC(sei_pic_timestamp)(CodedBitstreamContext *ctx, RWContext *rw,
561 H264RawSEIPicTimestamp *current,
562 const H264RawSPS *sps)
563 {
564 uint8_t time_offset_length;
565 int err;
566
567 u(2, ct_type, 0, 2);
568 flag(nuit_field_based_flag);
569 u(5, counting_type, 0, 6);
570 flag(full_timestamp_flag);
571 flag(discontinuity_flag);
572 flag(cnt_dropped_flag);
573 ub(8, n_frames);
574 if (current->full_timestamp_flag) {
575 u(6, seconds_value, 0, 59);
576 u(6, minutes_value, 0, 59);
577 u(5, hours_value, 0, 23);
578 } else {
579 flag(seconds_flag);
580 if (current->seconds_flag) {
581 u(6, seconds_value, 0, 59);
582 flag(minutes_flag);
583 if (current->minutes_flag) {
584 u(6, minutes_value, 0, 59);
585 flag(hours_flag);
586 if (current->hours_flag)
587 u(5, hours_value, 0, 23);
588 }
589 }
590 }
591
592 if (sps->vui.nal_hrd_parameters_present_flag)
593 time_offset_length = sps->vui.nal_hrd_parameters.time_offset_length;
594 else if (sps->vui.vcl_hrd_parameters_present_flag)
595 time_offset_length = sps->vui.vcl_hrd_parameters.time_offset_length;
596 else
597 time_offset_length = 24;
598
599 if (time_offset_length > 0)
600 ib(time_offset_length, time_offset);
601 else
602 infer(time_offset, 0);
603
604 return 0;
605 }
606
FUNC(sei_pic_timing)607 static int FUNC(sei_pic_timing)(CodedBitstreamContext *ctx, RWContext *rw,
608 H264RawSEIPicTiming *current,
609 SEIMessageState *sei)
610 {
611 CodedBitstreamH264Context *h264 = ctx->priv_data;
612 const H264RawSPS *sps;
613 int err;
614
615 HEADER("Picture Timing");
616
617 sps = h264->active_sps;
618 if (!sps) {
619 // If there is exactly one possible SPS but it is not yet active
620 // then just assume that it should be the active one.
621 int i, k = -1;
622 for (i = 0; i < H264_MAX_SPS_COUNT; i++) {
623 if (h264->sps[i]) {
624 if (k >= 0) {
625 k = -1;
626 break;
627 }
628 k = i;
629 }
630 }
631 if (k >= 0)
632 sps = h264->sps[k];
633 }
634 if (!sps) {
635 av_log(ctx->log_ctx, AV_LOG_ERROR,
636 "No active SPS for pic_timing.\n");
637 return AVERROR_INVALIDDATA;
638 }
639
640 if (sps->vui.nal_hrd_parameters_present_flag ||
641 sps->vui.vcl_hrd_parameters_present_flag) {
642 const H264RawHRD *hrd;
643
644 if (sps->vui.nal_hrd_parameters_present_flag)
645 hrd = &sps->vui.nal_hrd_parameters;
646 else if (sps->vui.vcl_hrd_parameters_present_flag)
647 hrd = &sps->vui.vcl_hrd_parameters;
648 else {
649 av_log(ctx->log_ctx, AV_LOG_ERROR,
650 "No HRD parameters for pic_timing.\n");
651 return AVERROR_INVALIDDATA;
652 }
653
654 ub(hrd->cpb_removal_delay_length_minus1 + 1, cpb_removal_delay);
655 ub(hrd->dpb_output_delay_length_minus1 + 1, dpb_output_delay);
656 }
657
658 if (sps->vui.pic_struct_present_flag) {
659 static const uint8_t num_clock_ts[9] = {
660 1, 1, 1, 2, 2, 3, 3, 2, 3
661 };
662 int i;
663
664 u(4, pic_struct, 0, 8);
665 if (current->pic_struct > 8)
666 return AVERROR_INVALIDDATA;
667
668 for (i = 0; i < num_clock_ts[current->pic_struct]; i++) {
669 flags(clock_timestamp_flag[i], 1, i);
670 if (current->clock_timestamp_flag[i])
671 CHECK(FUNC(sei_pic_timestamp)(ctx, rw,
672 ¤t->timestamp[i], sps));
673 }
674 }
675
676 return 0;
677 }
678
FUNC(sei_pan_scan_rect)679 static int FUNC(sei_pan_scan_rect)(CodedBitstreamContext *ctx, RWContext *rw,
680 H264RawSEIPanScanRect *current,
681 SEIMessageState *sei)
682 {
683 int err, i;
684
685 HEADER("Pan-Scan Rectangle");
686
687 ue(pan_scan_rect_id, 0, UINT32_MAX - 1);
688 flag(pan_scan_rect_cancel_flag);
689
690 if (!current->pan_scan_rect_cancel_flag) {
691 ue(pan_scan_cnt_minus1, 0, 2);
692
693 for (i = 0; i <= current->pan_scan_cnt_minus1; i++) {
694 ses(pan_scan_rect_left_offset[i], INT32_MIN + 1, INT32_MAX, 1, i);
695 ses(pan_scan_rect_right_offset[i], INT32_MIN + 1, INT32_MAX, 1, i);
696 ses(pan_scan_rect_top_offset[i], INT32_MIN + 1, INT32_MAX, 1, i);
697 ses(pan_scan_rect_bottom_offset[i], INT32_MIN + 1, INT32_MAX, 1, i);
698 }
699
700 ue(pan_scan_rect_repetition_period, 0, 16384);
701 }
702
703 return 0;
704 }
705
FUNC(sei_recovery_point)706 static int FUNC(sei_recovery_point)(CodedBitstreamContext *ctx, RWContext *rw,
707 H264RawSEIRecoveryPoint *current,
708 SEIMessageState *sei)
709 {
710 int err;
711
712 HEADER("Recovery Point");
713
714 ue(recovery_frame_cnt, 0, 65535);
715 flag(exact_match_flag);
716 flag(broken_link_flag);
717 u(2, changing_slice_group_idc, 0, 2);
718
719 return 0;
720 }
721
FUNC(film_grain_characteristics)722 static int FUNC(film_grain_characteristics)(CodedBitstreamContext *ctx, RWContext *rw,
723 H264RawFilmGrainCharacteristics *current,
724 SEIMessageState *state)
725 {
726 CodedBitstreamH264Context *h264 = ctx->priv_data;
727 const H264RawSPS *sps;
728 int err, c, i, j;
729
730 HEADER("Film Grain Characteristics");
731
732 sps = h264->active_sps;
733 if (!sps) {
734 // If there is exactly one possible SPS but it is not yet active
735 // then just assume that it should be the active one.
736 int i, k = -1;
737 for (i = 0; i < H264_MAX_SPS_COUNT; i++) {
738 if (h264->sps[i]) {
739 if (k >= 0) {
740 k = -1;
741 break;
742 }
743 k = i;
744 }
745 }
746 if (k >= 0)
747 sps = h264->sps[k];
748 }
749
750 flag(film_grain_characteristics_cancel_flag);
751 if (!current->film_grain_characteristics_cancel_flag) {
752 int filmGrainBitDepth[3];
753
754 u(2, film_grain_model_id, 0, 1);
755 flag(separate_colour_description_present_flag);
756 if (current->separate_colour_description_present_flag) {
757 ub(3, film_grain_bit_depth_luma_minus8);
758 ub(3, film_grain_bit_depth_chroma_minus8);
759 flag(film_grain_full_range_flag);
760 ub(8, film_grain_colour_primaries);
761 ub(8, film_grain_transfer_characteristics);
762 ub(8, film_grain_matrix_coefficients);
763 } else {
764 if (!sps) {
765 av_log(ctx->log_ctx, AV_LOG_ERROR,
766 "No active SPS for film_grain_characteristics.\n");
767 return AVERROR_INVALIDDATA;
768 }
769 infer(film_grain_bit_depth_luma_minus8, sps->bit_depth_luma_minus8);
770 infer(film_grain_bit_depth_chroma_minus8, sps->bit_depth_chroma_minus8);
771 infer(film_grain_full_range_flag, sps->vui.video_full_range_flag);
772 infer(film_grain_colour_primaries, sps->vui.colour_primaries);
773 infer(film_grain_transfer_characteristics, sps->vui.transfer_characteristics);
774 infer(film_grain_matrix_coefficients, sps->vui.matrix_coefficients);
775 }
776
777 filmGrainBitDepth[0] = current->film_grain_bit_depth_luma_minus8 + 8;
778 filmGrainBitDepth[1] =
779 filmGrainBitDepth[2] = current->film_grain_bit_depth_chroma_minus8 + 8;
780
781 u(2, blending_mode_id, 0, 1);
782 ub(4, log2_scale_factor);
783 for (c = 0; c < 3; c++)
784 flags(comp_model_present_flag[c], 1, c);
785 for (c = 0; c < 3; c++) {
786 if (current->comp_model_present_flag[c]) {
787 ubs(8, num_intensity_intervals_minus1[c], 1, c);
788 us(3, num_model_values_minus1[c], 0, 5, 1, c);
789 for (i = 0; i <= current->num_intensity_intervals_minus1[c]; i++) {
790 ubs(8, intensity_interval_lower_bound[c][i], 2, c, i);
791 ubs(8, intensity_interval_upper_bound[c][i], 2, c, i);
792 for (j = 0; j <= current->num_model_values_minus1[c]; j++)
793 ses(comp_model_value[c][i][j], 0 - current->film_grain_model_id * (1 << (filmGrainBitDepth[c] - 1)),
794 ((1 << filmGrainBitDepth[c]) - 1) - current->film_grain_model_id * (1 << (filmGrainBitDepth[c] - 1)),
795 3, c, i, j);
796 }
797 }
798 }
799 ue(film_grain_characteristics_repetition_period, 0, 16384);
800 }
801
802 return 0;
803 }
804
FUNC(sei_display_orientation)805 static int FUNC(sei_display_orientation)(CodedBitstreamContext *ctx, RWContext *rw,
806 H264RawSEIDisplayOrientation *current,
807 SEIMessageState *sei)
808 {
809 int err;
810
811 HEADER("Display Orientation");
812
813 flag(display_orientation_cancel_flag);
814 if (!current->display_orientation_cancel_flag) {
815 flag(hor_flip);
816 flag(ver_flip);
817 ub(16, anticlockwise_rotation);
818 ue(display_orientation_repetition_period, 0, 16384);
819 flag(display_orientation_extension_flag);
820 }
821
822 return 0;
823 }
824
FUNC(sei)825 static int FUNC(sei)(CodedBitstreamContext *ctx, RWContext *rw,
826 H264RawSEI *current)
827 {
828 int err;
829
830 HEADER("Supplemental Enhancement Information");
831
832 CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
833 1 << H264_NAL_SEI));
834
835 CHECK(FUNC_SEI(message_list)(ctx, rw, ¤t->message_list, 1));
836
837 CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
838
839 return 0;
840 }
841
FUNC(aud)842 static int FUNC(aud)(CodedBitstreamContext *ctx, RWContext *rw,
843 H264RawAUD *current)
844 {
845 int err;
846
847 HEADER("Access Unit Delimiter");
848
849 CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
850 1 << H264_NAL_AUD));
851
852 ub(3, primary_pic_type);
853
854 CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
855
856 return 0;
857 }
858
FUNC(ref_pic_list_modification)859 static int FUNC(ref_pic_list_modification)(CodedBitstreamContext *ctx, RWContext *rw,
860 H264RawSliceHeader *current)
861 {
862 CodedBitstreamH264Context *h264 = ctx->priv_data;
863 const H264RawSPS *sps = h264->active_sps;
864 int err, i, mopn;
865
866 if (current->slice_type % 5 != 2 &&
867 current->slice_type % 5 != 4) {
868 flag(ref_pic_list_modification_flag_l0);
869 if (current->ref_pic_list_modification_flag_l0) {
870 for (i = 0; i < H264_MAX_RPLM_COUNT; i++) {
871 xue(modification_of_pic_nums_idc,
872 current->rplm_l0[i].modification_of_pic_nums_idc, 0, 3, 0);
873
874 mopn = current->rplm_l0[i].modification_of_pic_nums_idc;
875 if (mopn == 3)
876 break;
877
878 if (mopn == 0 || mopn == 1)
879 xue(abs_diff_pic_num_minus1,
880 current->rplm_l0[i].abs_diff_pic_num_minus1,
881 0, (1 + current->field_pic_flag) *
882 (1 << (sps->log2_max_frame_num_minus4 + 4)), 0);
883 else if (mopn == 2)
884 xue(long_term_pic_num,
885 current->rplm_l0[i].long_term_pic_num,
886 0, sps->max_num_ref_frames - 1, 0);
887 }
888 }
889 }
890
891 if (current->slice_type % 5 == 1) {
892 flag(ref_pic_list_modification_flag_l1);
893 if (current->ref_pic_list_modification_flag_l1) {
894 for (i = 0; i < H264_MAX_RPLM_COUNT; i++) {
895 xue(modification_of_pic_nums_idc,
896 current->rplm_l1[i].modification_of_pic_nums_idc, 0, 3, 0);
897
898 mopn = current->rplm_l1[i].modification_of_pic_nums_idc;
899 if (mopn == 3)
900 break;
901
902 if (mopn == 0 || mopn == 1)
903 xue(abs_diff_pic_num_minus1,
904 current->rplm_l1[i].abs_diff_pic_num_minus1,
905 0, (1 + current->field_pic_flag) *
906 (1 << (sps->log2_max_frame_num_minus4 + 4)), 0);
907 else if (mopn == 2)
908 xue(long_term_pic_num,
909 current->rplm_l1[i].long_term_pic_num,
910 0, sps->max_num_ref_frames - 1, 0);
911 }
912 }
913 }
914
915 return 0;
916 }
917
FUNC(pred_weight_table)918 static int FUNC(pred_weight_table)(CodedBitstreamContext *ctx, RWContext *rw,
919 H264RawSliceHeader *current)
920 {
921 CodedBitstreamH264Context *h264 = ctx->priv_data;
922 const H264RawSPS *sps = h264->active_sps;
923 int chroma;
924 int err, i, j;
925
926 ue(luma_log2_weight_denom, 0, 7);
927
928 chroma = !sps->separate_colour_plane_flag && sps->chroma_format_idc != 0;
929 if (chroma)
930 ue(chroma_log2_weight_denom, 0, 7);
931
932 for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) {
933 flags(luma_weight_l0_flag[i], 1, i);
934 if (current->luma_weight_l0_flag[i]) {
935 ses(luma_weight_l0[i], -128, +127, 1, i);
936 ses(luma_offset_l0[i], -128, +127, 1, i);
937 }
938 if (chroma) {
939 flags(chroma_weight_l0_flag[i], 1, i);
940 if (current->chroma_weight_l0_flag[i]) {
941 for (j = 0; j < 2; j++) {
942 ses(chroma_weight_l0[i][j], -128, +127, 2, i, j);
943 ses(chroma_offset_l0[i][j], -128, +127, 2, i, j);
944 }
945 }
946 }
947 }
948
949 if (current->slice_type % 5 == 1) {
950 for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) {
951 flags(luma_weight_l1_flag[i], 1, i);
952 if (current->luma_weight_l1_flag[i]) {
953 ses(luma_weight_l1[i], -128, +127, 1, i);
954 ses(luma_offset_l1[i], -128, +127, 1, i);
955 }
956 if (chroma) {
957 flags(chroma_weight_l1_flag[i], 1, i);
958 if (current->chroma_weight_l1_flag[i]) {
959 for (j = 0; j < 2; j++) {
960 ses(chroma_weight_l1[i][j], -128, +127, 2, i, j);
961 ses(chroma_offset_l1[i][j], -128, +127, 2, i, j);
962 }
963 }
964 }
965 }
966 }
967
968 return 0;
969 }
970
FUNC(dec_ref_pic_marking)971 static int FUNC(dec_ref_pic_marking)(CodedBitstreamContext *ctx, RWContext *rw,
972 H264RawSliceHeader *current, int idr_pic_flag)
973 {
974 CodedBitstreamH264Context *h264 = ctx->priv_data;
975 const H264RawSPS *sps = h264->active_sps;
976 int err, i;
977 uint32_t mmco;
978
979 if (idr_pic_flag) {
980 flag(no_output_of_prior_pics_flag);
981 flag(long_term_reference_flag);
982 } else {
983 flag(adaptive_ref_pic_marking_mode_flag);
984 if (current->adaptive_ref_pic_marking_mode_flag) {
985 for (i = 0; i < H264_MAX_MMCO_COUNT; i++) {
986 xue(memory_management_control_operation,
987 current->mmco[i].memory_management_control_operation,
988 0, 6, 0);
989
990 mmco = current->mmco[i].memory_management_control_operation;
991 if (mmco == 0)
992 break;
993
994 if (mmco == 1 || mmco == 3)
995 xue(difference_of_pic_nums_minus1,
996 current->mmco[i].difference_of_pic_nums_minus1,
997 0, INT32_MAX, 0);
998 if (mmco == 2)
999 xue(long_term_pic_num,
1000 current->mmco[i].long_term_pic_num,
1001 0, sps->max_num_ref_frames - 1, 0);
1002 if (mmco == 3 || mmco == 6)
1003 xue(long_term_frame_idx,
1004 current->mmco[i].long_term_frame_idx,
1005 0, sps->max_num_ref_frames - 1, 0);
1006 if (mmco == 4)
1007 xue(max_long_term_frame_idx_plus1,
1008 current->mmco[i].max_long_term_frame_idx_plus1,
1009 0, sps->max_num_ref_frames, 0);
1010 }
1011 if (i == H264_MAX_MMCO_COUNT) {
1012 av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many "
1013 "memory management control operations.\n");
1014 return AVERROR_INVALIDDATA;
1015 }
1016 }
1017 }
1018
1019 return 0;
1020 }
1021
FUNC(slice_header)1022 static int FUNC(slice_header)(CodedBitstreamContext *ctx, RWContext *rw,
1023 H264RawSliceHeader *current)
1024 {
1025 CodedBitstreamH264Context *h264 = ctx->priv_data;
1026 const H264RawSPS *sps;
1027 const H264RawPPS *pps;
1028 int err;
1029 int idr_pic_flag;
1030 int slice_type_i, slice_type_p, slice_type_b;
1031 int slice_type_si, slice_type_sp;
1032
1033 HEADER("Slice Header");
1034
1035 CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
1036 1 << H264_NAL_SLICE |
1037 1 << H264_NAL_IDR_SLICE |
1038 1 << H264_NAL_AUXILIARY_SLICE));
1039
1040 if (current->nal_unit_header.nal_unit_type == H264_NAL_AUXILIARY_SLICE) {
1041 if (!h264->last_slice_nal_unit_type) {
1042 av_log(ctx->log_ctx, AV_LOG_ERROR, "Auxiliary slice "
1043 "is not decodable without the main picture "
1044 "in the same access unit.\n");
1045 return AVERROR_INVALIDDATA;
1046 }
1047 idr_pic_flag = h264->last_slice_nal_unit_type == H264_NAL_IDR_SLICE;
1048 } else {
1049 idr_pic_flag = current->nal_unit_header.nal_unit_type == H264_NAL_IDR_SLICE;
1050 }
1051
1052 ue(first_mb_in_slice, 0, H264_MAX_MB_PIC_SIZE - 1);
1053 ue(slice_type, 0, 9);
1054
1055 slice_type_i = current->slice_type % 5 == 2;
1056 slice_type_p = current->slice_type % 5 == 0;
1057 slice_type_b = current->slice_type % 5 == 1;
1058 slice_type_si = current->slice_type % 5 == 4;
1059 slice_type_sp = current->slice_type % 5 == 3;
1060
1061 if (idr_pic_flag && !(slice_type_i || slice_type_si)) {
1062 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid slice type %d "
1063 "for IDR picture.\n", current->slice_type);
1064 return AVERROR_INVALIDDATA;
1065 }
1066
1067 ue(pic_parameter_set_id, 0, 255);
1068
1069 pps = h264->pps[current->pic_parameter_set_id];
1070 if (!pps) {
1071 av_log(ctx->log_ctx, AV_LOG_ERROR, "PPS id %d not available.\n",
1072 current->pic_parameter_set_id);
1073 return AVERROR_INVALIDDATA;
1074 }
1075 h264->active_pps = pps;
1076
1077 sps = h264->sps[pps->seq_parameter_set_id];
1078 if (!sps) {
1079 av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
1080 pps->seq_parameter_set_id);
1081 return AVERROR_INVALIDDATA;
1082 }
1083 h264->active_sps = sps;
1084
1085 if (sps->separate_colour_plane_flag)
1086 u(2, colour_plane_id, 0, 2);
1087
1088 ub(sps->log2_max_frame_num_minus4 + 4, frame_num);
1089
1090 if (!sps->frame_mbs_only_flag) {
1091 flag(field_pic_flag);
1092 if (current->field_pic_flag)
1093 flag(bottom_field_flag);
1094 else
1095 infer(bottom_field_flag, 0);
1096 } else {
1097 infer(field_pic_flag, 0);
1098 infer(bottom_field_flag, 0);
1099 }
1100
1101 if (idr_pic_flag)
1102 ue(idr_pic_id, 0, 65535);
1103
1104 if (sps->pic_order_cnt_type == 0) {
1105 ub(sps->log2_max_pic_order_cnt_lsb_minus4 + 4, pic_order_cnt_lsb);
1106 if (pps->bottom_field_pic_order_in_frame_present_flag &&
1107 !current->field_pic_flag)
1108 se(delta_pic_order_cnt_bottom, INT32_MIN + 1, INT32_MAX);
1109
1110 } else if (sps->pic_order_cnt_type == 1) {
1111 if (!sps->delta_pic_order_always_zero_flag) {
1112 se(delta_pic_order_cnt[0], INT32_MIN + 1, INT32_MAX);
1113 if (pps->bottom_field_pic_order_in_frame_present_flag &&
1114 !current->field_pic_flag)
1115 se(delta_pic_order_cnt[1], INT32_MIN + 1, INT32_MAX);
1116 else
1117 infer(delta_pic_order_cnt[1], 0);
1118 } else {
1119 infer(delta_pic_order_cnt[0], 0);
1120 infer(delta_pic_order_cnt[1], 0);
1121 }
1122 }
1123
1124 if (pps->redundant_pic_cnt_present_flag)
1125 ue(redundant_pic_cnt, 0, 127);
1126 else
1127 infer(redundant_pic_cnt, 0);
1128
1129 if (current->nal_unit_header.nal_unit_type != H264_NAL_AUXILIARY_SLICE
1130 && !current->redundant_pic_cnt)
1131 h264->last_slice_nal_unit_type =
1132 current->nal_unit_header.nal_unit_type;
1133
1134 if (slice_type_b)
1135 flag(direct_spatial_mv_pred_flag);
1136
1137 if (slice_type_p || slice_type_sp || slice_type_b) {
1138 flag(num_ref_idx_active_override_flag);
1139 if (current->num_ref_idx_active_override_flag) {
1140 ue(num_ref_idx_l0_active_minus1, 0, 31);
1141 if (slice_type_b)
1142 ue(num_ref_idx_l1_active_minus1, 0, 31);
1143 } else {
1144 infer(num_ref_idx_l0_active_minus1,
1145 pps->num_ref_idx_l0_default_active_minus1);
1146 infer(num_ref_idx_l1_active_minus1,
1147 pps->num_ref_idx_l1_default_active_minus1);
1148 }
1149 }
1150
1151 if (current->nal_unit_header.nal_unit_type == 20 ||
1152 current->nal_unit_header.nal_unit_type == 21) {
1153 av_log(ctx->log_ctx, AV_LOG_ERROR, "MVC / 3DAVC not supported.\n");
1154 return AVERROR_PATCHWELCOME;
1155 } else {
1156 CHECK(FUNC(ref_pic_list_modification)(ctx, rw, current));
1157 }
1158
1159 if ((pps->weighted_pred_flag && (slice_type_p || slice_type_sp)) ||
1160 (pps->weighted_bipred_idc == 1 && slice_type_b)) {
1161 CHECK(FUNC(pred_weight_table)(ctx, rw, current));
1162 }
1163
1164 if (current->nal_unit_header.nal_ref_idc != 0) {
1165 CHECK(FUNC(dec_ref_pic_marking)(ctx, rw, current, idr_pic_flag));
1166 }
1167
1168 if (pps->entropy_coding_mode_flag &&
1169 !slice_type_i && !slice_type_si) {
1170 ue(cabac_init_idc, 0, 2);
1171 }
1172
1173 se(slice_qp_delta, - 51 - 6 * sps->bit_depth_luma_minus8,
1174 + 51 + 6 * sps->bit_depth_luma_minus8);
1175 if (slice_type_sp || slice_type_si) {
1176 if (slice_type_sp)
1177 flag(sp_for_switch_flag);
1178 se(slice_qs_delta, -51, +51);
1179 }
1180
1181 if (pps->deblocking_filter_control_present_flag) {
1182 ue(disable_deblocking_filter_idc, 0, 2);
1183 if (current->disable_deblocking_filter_idc != 1) {
1184 se(slice_alpha_c0_offset_div2, -6, +6);
1185 se(slice_beta_offset_div2, -6, +6);
1186 } else {
1187 infer(slice_alpha_c0_offset_div2, 0);
1188 infer(slice_beta_offset_div2, 0);
1189 }
1190 } else {
1191 infer(disable_deblocking_filter_idc, 0);
1192 infer(slice_alpha_c0_offset_div2, 0);
1193 infer(slice_beta_offset_div2, 0);
1194 }
1195
1196 if (pps->num_slice_groups_minus1 > 0 &&
1197 pps->slice_group_map_type >= 3 &&
1198 pps->slice_group_map_type <= 5) {
1199 unsigned int pic_size, max, bits;
1200
1201 pic_size = (sps->pic_width_in_mbs_minus1 + 1) *
1202 (sps->pic_height_in_map_units_minus1 + 1);
1203 max = (pic_size + pps->slice_group_change_rate_minus1) /
1204 (pps->slice_group_change_rate_minus1 + 1);
1205 bits = av_ceil_log2(max + 1);
1206
1207 u(bits, slice_group_change_cycle, 0, max);
1208 }
1209
1210 if (pps->entropy_coding_mode_flag) {
1211 while (byte_alignment(rw))
1212 fixed(1, cabac_alignment_one_bit, 1);
1213 }
1214
1215 return 0;
1216 }
1217
FUNC(filler)1218 static int FUNC(filler)(CodedBitstreamContext *ctx, RWContext *rw,
1219 H264RawFiller *current)
1220 {
1221 int err;
1222
1223 HEADER("Filler Data");
1224
1225 CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
1226 1 << H264_NAL_FILLER_DATA));
1227
1228 #ifdef READ
1229 while (show_bits(rw, 8) == 0xff) {
1230 fixed(8, ff_byte, 0xff);
1231 ++current->filler_size;
1232 }
1233 #else
1234 {
1235 uint32_t i;
1236 for (i = 0; i < current->filler_size; i++)
1237 fixed(8, ff_byte, 0xff);
1238 }
1239 #endif
1240
1241 CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
1242
1243 return 0;
1244 }
1245
FUNC(end_of_sequence)1246 static int FUNC(end_of_sequence)(CodedBitstreamContext *ctx, RWContext *rw,
1247 H264RawNALUnitHeader *current)
1248 {
1249 HEADER("End of Sequence");
1250
1251 return FUNC(nal_unit_header)(ctx, rw, current,
1252 1 << H264_NAL_END_SEQUENCE);
1253 }
1254
FUNC(end_of_stream)1255 static int FUNC(end_of_stream)(CodedBitstreamContext *ctx, RWContext *rw,
1256 H264RawNALUnitHeader *current)
1257 {
1258 HEADER("End of Stream");
1259
1260 return FUNC(nal_unit_header)(ctx, rw, current,
1261 1 << H264_NAL_END_STREAM);
1262 }
1263