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 19static 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 30static 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 71static 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 88static 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 111static 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 220static 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 260static 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 372static 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 404static 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 513static 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 560static 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 607static 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 679static 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 706static 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 722static 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 805static 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 825static 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 842static 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 859static 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 918static 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 971static 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 1022static 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 1218static 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 1246static 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 1255static 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