/* * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ static int FUNC(rbsp_trailing_bits)(CodedBitstreamContext *ctx, RWContext *rw) { int err; fixed(1, rbsp_stop_one_bit, 1); while(byte_alignment(rw) != 0) fixed(1, rbsp_alignment_zero_bit, 0); return 0; } static int FUNC(nal_unit_header)(CodedBitstreamContext *ctx, RWContext *rw, H264RawNALUnitHeader *current, uint32_t valid_type_mask) { int err; fixed(1, forbidden_zero_bit, 0); ub(2, nal_ref_idc); ub(5, nal_unit_type); if(!(1 << current->nal_unit_type & valid_type_mask)) { av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid NAL unit type %d.\n", current->nal_unit_type); return AVERROR_INVALIDDATA; } if(current->nal_unit_type == 14 || current->nal_unit_type == 20 || current->nal_unit_type == 21) { if(current->nal_unit_type != 21) flag(svc_extension_flag); else flag(avc_3d_extension_flag); if(current->svc_extension_flag) { av_log(ctx->log_ctx, AV_LOG_ERROR, "SVC not supported.\n"); return AVERROR_PATCHWELCOME; } else if(current->avc_3d_extension_flag) { av_log(ctx->log_ctx, AV_LOG_ERROR, "3DAVC not supported.\n"); return AVERROR_PATCHWELCOME; } else { av_log(ctx->log_ctx, AV_LOG_ERROR, "MVC not supported.\n"); return AVERROR_PATCHWELCOME; } } return 0; } static int FUNC(scaling_list)(CodedBitstreamContext *ctx, RWContext *rw, H264RawScalingList *current, int size_of_scaling_list) { int err, i, scale; scale = 8; for(i = 0; i < size_of_scaling_list; i++) { ses(delta_scale[i], -128, +127, 1, i); scale = (scale + current->delta_scale[i] + 256) % 256; if(scale == 0) break; } return 0; } static int FUNC(hrd_parameters)(CodedBitstreamContext *ctx, RWContext *rw, H264RawHRD *current) { int err, i; ue(cpb_cnt_minus1, 0, 31); ub(4, bit_rate_scale); ub(4, cpb_size_scale); for(i = 0; i <= current->cpb_cnt_minus1; i++) { ues(bit_rate_value_minus1[i], 0, UINT32_MAX - 1, 1, i); ues(cpb_size_value_minus1[i], 0, UINT32_MAX - 1, 1, i); flags(cbr_flag[i], 1, i); } ub(5, initial_cpb_removal_delay_length_minus1); ub(5, cpb_removal_delay_length_minus1); ub(5, dpb_output_delay_length_minus1); ub(5, time_offset_length); return 0; } static int FUNC(vui_parameters)(CodedBitstreamContext *ctx, RWContext *rw, H264RawVUI *current, H264RawSPS *sps) { int err; flag(aspect_ratio_info_present_flag); if(current->aspect_ratio_info_present_flag) { ub(8, aspect_ratio_idc); if(current->aspect_ratio_idc == 255) { ub(16, sar_width); ub(16, sar_height); } } else { infer(aspect_ratio_idc, 0); } flag(overscan_info_present_flag); if(current->overscan_info_present_flag) flag(overscan_appropriate_flag); flag(video_signal_type_present_flag); if(current->video_signal_type_present_flag) { ub(3, video_format); flag(video_full_range_flag); flag(colour_description_present_flag); if(current->colour_description_present_flag) { ub(8, colour_primaries); ub(8, transfer_characteristics); ub(8, matrix_coefficients); } else { infer(colour_primaries, 2); infer(transfer_characteristics, 2); infer(matrix_coefficients, 2); } } else { infer(video_format, 5); infer(video_full_range_flag, 0); infer(colour_primaries, 2); infer(transfer_characteristics, 2); infer(matrix_coefficients, 2); } flag(chroma_loc_info_present_flag); if(current->chroma_loc_info_present_flag) { ue(chroma_sample_loc_type_top_field, 0, 5); ue(chroma_sample_loc_type_bottom_field, 0, 5); } else { infer(chroma_sample_loc_type_top_field, 0); infer(chroma_sample_loc_type_bottom_field, 0); } flag(timing_info_present_flag); if(current->timing_info_present_flag) { u(32, num_units_in_tick, 1, UINT32_MAX); u(32, time_scale, 1, UINT32_MAX); flag(fixed_frame_rate_flag); } else { infer(fixed_frame_rate_flag, 0); } flag(nal_hrd_parameters_present_flag); if(current->nal_hrd_parameters_present_flag) CHECK(FUNC(hrd_parameters)(ctx, rw, ¤t->nal_hrd_parameters)); flag(vcl_hrd_parameters_present_flag); if(current->vcl_hrd_parameters_present_flag) CHECK(FUNC(hrd_parameters)(ctx, rw, ¤t->vcl_hrd_parameters)); if(current->nal_hrd_parameters_present_flag || current->vcl_hrd_parameters_present_flag) flag(low_delay_hrd_flag); else infer(low_delay_hrd_flag, 1 - current->fixed_frame_rate_flag); flag(pic_struct_present_flag); flag(bitstream_restriction_flag); if(current->bitstream_restriction_flag) { flag(motion_vectors_over_pic_boundaries_flag); ue(max_bytes_per_pic_denom, 0, 16); ue(max_bits_per_mb_denom, 0, 16); // The current version of the standard constrains this to be in // [0,15], but older versions allow 16. ue(log2_max_mv_length_horizontal, 0, 16); ue(log2_max_mv_length_vertical, 0, 16); ue(max_num_reorder_frames, 0, H264_MAX_DPB_FRAMES); ue(max_dec_frame_buffering, 0, H264_MAX_DPB_FRAMES); } else { infer(motion_vectors_over_pic_boundaries_flag, 1); infer(max_bytes_per_pic_denom, 2); infer(max_bits_per_mb_denom, 1); infer(log2_max_mv_length_horizontal, 15); infer(log2_max_mv_length_vertical, 15); if((sps->profile_idc == 44 || sps->profile_idc == 86 || sps->profile_idc == 100 || sps->profile_idc == 110 || sps->profile_idc == 122 || sps->profile_idc == 244) && sps->constraint_set3_flag) { infer(max_num_reorder_frames, 0); infer(max_dec_frame_buffering, 0); } else { infer(max_num_reorder_frames, H264_MAX_DPB_FRAMES); infer(max_dec_frame_buffering, H264_MAX_DPB_FRAMES); } } return 0; } static int FUNC(vui_parameters_default)(CodedBitstreamContext *ctx, RWContext *rw, H264RawVUI *current, H264RawSPS *sps) { infer(aspect_ratio_idc, 0); infer(video_format, 5); infer(video_full_range_flag, 0); infer(colour_primaries, 2); infer(transfer_characteristics, 2); infer(matrix_coefficients, 2); infer(chroma_sample_loc_type_top_field, 0); infer(chroma_sample_loc_type_bottom_field, 0); infer(fixed_frame_rate_flag, 0); infer(low_delay_hrd_flag, 1); infer(pic_struct_present_flag, 0); infer(motion_vectors_over_pic_boundaries_flag, 1); infer(max_bytes_per_pic_denom, 2); infer(max_bits_per_mb_denom, 1); infer(log2_max_mv_length_horizontal, 15); infer(log2_max_mv_length_vertical, 15); if((sps->profile_idc == 44 || sps->profile_idc == 86 || sps->profile_idc == 100 || sps->profile_idc == 110 || sps->profile_idc == 122 || sps->profile_idc == 244) && sps->constraint_set3_flag) { infer(max_num_reorder_frames, 0); infer(max_dec_frame_buffering, 0); } else { infer(max_num_reorder_frames, H264_MAX_DPB_FRAMES); infer(max_dec_frame_buffering, H264_MAX_DPB_FRAMES); } return 0; } static int FUNC(sps)(CodedBitstreamContext *ctx, RWContext *rw, H264RawSPS *current) { int err, i; HEADER("Sequence Parameter Set"); CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header, 1 << H264_NAL_SPS)); ub(8, profile_idc); flag(constraint_set0_flag); flag(constraint_set1_flag); flag(constraint_set2_flag); flag(constraint_set3_flag); flag(constraint_set4_flag); flag(constraint_set5_flag); u(2, reserved_zero_2bits, 0, 0); ub(8, level_idc); ue(seq_parameter_set_id, 0, 31); if(current->profile_idc == 100 || current->profile_idc == 110 || current->profile_idc == 122 || current->profile_idc == 244 || current->profile_idc == 44 || current->profile_idc == 83 || current->profile_idc == 86 || current->profile_idc == 118 || current->profile_idc == 128 || current->profile_idc == 138) { ue(chroma_format_idc, 0, 3); if(current->chroma_format_idc == 3) flag(separate_colour_plane_flag); else infer(separate_colour_plane_flag, 0); ue(bit_depth_luma_minus8, 0, 6); ue(bit_depth_chroma_minus8, 0, 6); flag(qpprime_y_zero_transform_bypass_flag); flag(seq_scaling_matrix_present_flag); if(current->seq_scaling_matrix_present_flag) { for(i = 0; i < ((current->chroma_format_idc != 3) ? 8 : 12); i++) { flags(seq_scaling_list_present_flag[i], 1, i); if(current->seq_scaling_list_present_flag[i]) { if(i < 6) CHECK(FUNC(scaling_list)(ctx, rw, ¤t->scaling_list_4x4[i], 16)); else CHECK(FUNC(scaling_list)(ctx, rw, ¤t->scaling_list_8x8[i - 6], 64)); } } } } else { infer(chroma_format_idc, current->profile_idc == 183 ? 0 : 1); infer(separate_colour_plane_flag, 0); infer(bit_depth_luma_minus8, 0); infer(bit_depth_chroma_minus8, 0); } ue(log2_max_frame_num_minus4, 0, 12); ue(pic_order_cnt_type, 0, 2); if(current->pic_order_cnt_type == 0) { ue(log2_max_pic_order_cnt_lsb_minus4, 0, 12); } else if(current->pic_order_cnt_type == 1) { flag(delta_pic_order_always_zero_flag); se(offset_for_non_ref_pic, INT32_MIN + 1, INT32_MAX); se(offset_for_top_to_bottom_field, INT32_MIN + 1, INT32_MAX); ue(num_ref_frames_in_pic_order_cnt_cycle, 0, 255); for(i = 0; i < current->num_ref_frames_in_pic_order_cnt_cycle; i++) ses(offset_for_ref_frame[i], INT32_MIN + 1, INT32_MAX, 1, i); } ue(max_num_ref_frames, 0, H264_MAX_DPB_FRAMES); flag(gaps_in_frame_num_allowed_flag); ue(pic_width_in_mbs_minus1, 0, H264_MAX_MB_WIDTH); ue(pic_height_in_map_units_minus1, 0, H264_MAX_MB_HEIGHT); flag(frame_mbs_only_flag); if(!current->frame_mbs_only_flag) flag(mb_adaptive_frame_field_flag); flag(direct_8x8_inference_flag); flag(frame_cropping_flag); if(current->frame_cropping_flag) { ue(frame_crop_left_offset, 0, H264_MAX_WIDTH); ue(frame_crop_right_offset, 0, H264_MAX_WIDTH); ue(frame_crop_top_offset, 0, H264_MAX_HEIGHT); ue(frame_crop_bottom_offset, 0, H264_MAX_HEIGHT); } flag(vui_parameters_present_flag); if(current->vui_parameters_present_flag) CHECK(FUNC(vui_parameters)(ctx, rw, ¤t->vui, current)); else CHECK(FUNC(vui_parameters_default)(ctx, rw, ¤t->vui, current)); CHECK(FUNC(rbsp_trailing_bits)(ctx, rw)); return 0; } static int FUNC(sps_extension)(CodedBitstreamContext *ctx, RWContext *rw, H264RawSPSExtension *current) { int err; HEADER("Sequence Parameter Set Extension"); CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header, 1 << H264_NAL_SPS_EXT)); ue(seq_parameter_set_id, 0, 31); ue(aux_format_idc, 0, 3); if(current->aux_format_idc != 0) { int bits; ue(bit_depth_aux_minus8, 0, 4); flag(alpha_incr_flag); bits = current->bit_depth_aux_minus8 + 9; ub(bits, alpha_opaque_value); ub(bits, alpha_transparent_value); } flag(additional_extension_flag); CHECK(FUNC(rbsp_trailing_bits)(ctx, rw)); return 0; } static int FUNC(pps)(CodedBitstreamContext *ctx, RWContext *rw, H264RawPPS *current) { CodedBitstreamH264Context *h264 = ctx->priv_data; const H264RawSPS *sps; int err, i; HEADER("Picture Parameter Set"); CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header, 1 << H264_NAL_PPS)); ue(pic_parameter_set_id, 0, 255); ue(seq_parameter_set_id, 0, 31); sps = h264->sps[current->seq_parameter_set_id]; if(!sps) { av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n", current->seq_parameter_set_id); return AVERROR_INVALIDDATA; } flag(entropy_coding_mode_flag); flag(bottom_field_pic_order_in_frame_present_flag); ue(num_slice_groups_minus1, 0, 7); if(current->num_slice_groups_minus1 > 0) { unsigned int pic_size; int iGroup; pic_size = (sps->pic_width_in_mbs_minus1 + 1) * (sps->pic_height_in_map_units_minus1 + 1); ue(slice_group_map_type, 0, 6); if(current->slice_group_map_type == 0) { for(iGroup = 0; iGroup <= current->num_slice_groups_minus1; iGroup++) ues(run_length_minus1[iGroup], 0, pic_size - 1, 1, iGroup); } else if(current->slice_group_map_type == 2) { for(iGroup = 0; iGroup < current->num_slice_groups_minus1; iGroup++) { ues(top_left[iGroup], 0, pic_size - 1, 1, iGroup); ues(bottom_right[iGroup], current->top_left[iGroup], pic_size - 1, 1, iGroup); } } else if(current->slice_group_map_type == 3 || current->slice_group_map_type == 4 || current->slice_group_map_type == 5) { flag(slice_group_change_direction_flag); ue(slice_group_change_rate_minus1, 0, pic_size - 1); } else if(current->slice_group_map_type == 6) { ue(pic_size_in_map_units_minus1, pic_size - 1, pic_size - 1); allocate(current->slice_group_id, current->pic_size_in_map_units_minus1 + 1); for(i = 0; i <= current->pic_size_in_map_units_minus1; i++) us(av_log2(2 * current->num_slice_groups_minus1 + 1), slice_group_id[i], 0, current->num_slice_groups_minus1, 1, i); } } ue(num_ref_idx_l0_default_active_minus1, 0, 31); ue(num_ref_idx_l1_default_active_minus1, 0, 31); flag(weighted_pred_flag); u(2, weighted_bipred_idc, 0, 2); se(pic_init_qp_minus26, -26 - 6 * sps->bit_depth_luma_minus8, +25); se(pic_init_qs_minus26, -26, +25); se(chroma_qp_index_offset, -12, +12); flag(deblocking_filter_control_present_flag); flag(constrained_intra_pred_flag); flag(redundant_pic_cnt_present_flag); if(more_rbsp_data(current->more_rbsp_data)) { flag(transform_8x8_mode_flag); flag(pic_scaling_matrix_present_flag); if(current->pic_scaling_matrix_present_flag) { for(i = 0; i < 6 + (((sps->chroma_format_idc != 3) ? 2 : 6) * current->transform_8x8_mode_flag); i++) { flags(pic_scaling_list_present_flag[i], 1, i); if(current->pic_scaling_list_present_flag[i]) { if(i < 6) CHECK(FUNC(scaling_list)(ctx, rw, ¤t->scaling_list_4x4[i], 16)); else CHECK(FUNC(scaling_list)(ctx, rw, ¤t->scaling_list_8x8[i - 6], 64)); } } } se(second_chroma_qp_index_offset, -12, +12); } else { infer(transform_8x8_mode_flag, 0); infer(pic_scaling_matrix_present_flag, 0); infer(second_chroma_qp_index_offset, current->chroma_qp_index_offset); } CHECK(FUNC(rbsp_trailing_bits)(ctx, rw)); return 0; } static int FUNC(sei_buffering_period)(CodedBitstreamContext *ctx, RWContext *rw, H264RawSEIBufferingPeriod *current, SEIMessageState *sei) { CodedBitstreamH264Context *h264 = ctx->priv_data; const H264RawSPS *sps; int err, i, length; HEADER("Buffering Period"); ue(seq_parameter_set_id, 0, 31); sps = h264->sps[current->seq_parameter_set_id]; if(!sps) { av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n", current->seq_parameter_set_id); return AVERROR_INVALIDDATA; } h264->active_sps = sps; if(sps->vui.nal_hrd_parameters_present_flag) { for(i = 0; i <= sps->vui.nal_hrd_parameters.cpb_cnt_minus1; i++) { length = sps->vui.nal_hrd_parameters.initial_cpb_removal_delay_length_minus1 + 1; xu(length, initial_cpb_removal_delay[SchedSelIdx], current->nal.initial_cpb_removal_delay[i], 1, MAX_UINT_BITS(length), 1, i); xu(length, initial_cpb_removal_delay_offset[SchedSelIdx], current->nal.initial_cpb_removal_delay_offset[i], 0, MAX_UINT_BITS(length), 1, i); } } if(sps->vui.vcl_hrd_parameters_present_flag) { for(i = 0; i <= sps->vui.vcl_hrd_parameters.cpb_cnt_minus1; i++) { length = sps->vui.vcl_hrd_parameters.initial_cpb_removal_delay_length_minus1 + 1; xu(length, initial_cpb_removal_delay[SchedSelIdx], current->vcl.initial_cpb_removal_delay[i], 1, MAX_UINT_BITS(length), 1, i); xu(length, initial_cpb_removal_delay_offset[SchedSelIdx], current->vcl.initial_cpb_removal_delay_offset[i], 0, MAX_UINT_BITS(length), 1, i); } } return 0; } static int FUNC(sei_pic_timestamp)(CodedBitstreamContext *ctx, RWContext *rw, H264RawSEIPicTimestamp *current, const H264RawSPS *sps) { uint8_t time_offset_length; int err; u(2, ct_type, 0, 2); flag(nuit_field_based_flag); u(5, counting_type, 0, 6); flag(full_timestamp_flag); flag(discontinuity_flag); flag(cnt_dropped_flag); ub(8, n_frames); if(current->full_timestamp_flag) { u(6, seconds_value, 0, 59); u(6, minutes_value, 0, 59); u(5, hours_value, 0, 23); } else { flag(seconds_flag); if(current->seconds_flag) { u(6, seconds_value, 0, 59); flag(minutes_flag); if(current->minutes_flag) { u(6, minutes_value, 0, 59); flag(hours_flag); if(current->hours_flag) u(5, hours_value, 0, 23); } } } if(sps->vui.nal_hrd_parameters_present_flag) time_offset_length = sps->vui.nal_hrd_parameters.time_offset_length; else if(sps->vui.vcl_hrd_parameters_present_flag) time_offset_length = sps->vui.vcl_hrd_parameters.time_offset_length; else time_offset_length = 24; if(time_offset_length > 0) ib(time_offset_length, time_offset); else infer(time_offset, 0); return 0; } static int FUNC(sei_pic_timing)(CodedBitstreamContext *ctx, RWContext *rw, H264RawSEIPicTiming *current, SEIMessageState *sei) { CodedBitstreamH264Context *h264 = ctx->priv_data; const H264RawSPS *sps; int err; HEADER("Picture Timing"); sps = h264->active_sps; if(!sps) { // If there is exactly one possible SPS but it is not yet active // then just assume that it should be the active one. int i, k = -1; for(i = 0; i < H264_MAX_SPS_COUNT; i++) { if(h264->sps[i]) { if(k >= 0) { k = -1; break; } k = i; } } if(k >= 0) sps = h264->sps[k]; } if(!sps) { av_log(ctx->log_ctx, AV_LOG_ERROR, "No active SPS for pic_timing.\n"); return AVERROR_INVALIDDATA; } if(sps->vui.nal_hrd_parameters_present_flag || sps->vui.vcl_hrd_parameters_present_flag) { const H264RawHRD *hrd; if(sps->vui.nal_hrd_parameters_present_flag) hrd = &sps->vui.nal_hrd_parameters; else if(sps->vui.vcl_hrd_parameters_present_flag) hrd = &sps->vui.vcl_hrd_parameters; else { av_log(ctx->log_ctx, AV_LOG_ERROR, "No HRD parameters for pic_timing.\n"); return AVERROR_INVALIDDATA; } ub(hrd->cpb_removal_delay_length_minus1 + 1, cpb_removal_delay); ub(hrd->dpb_output_delay_length_minus1 + 1, dpb_output_delay); } if(sps->vui.pic_struct_present_flag) { static const uint8_t num_clock_ts[9] = { 1, 1, 1, 2, 2, 3, 3, 2, 3 }; int i; u(4, pic_struct, 0, 8); if(current->pic_struct > 8) return AVERROR_INVALIDDATA; for(i = 0; i < num_clock_ts[current->pic_struct]; i++) { flags(clock_timestamp_flag[i], 1, i); if(current->clock_timestamp_flag[i]) CHECK(FUNC(sei_pic_timestamp)(ctx, rw, ¤t->timestamp[i], sps)); } } return 0; } static int FUNC(sei_pan_scan_rect)(CodedBitstreamContext *ctx, RWContext *rw, H264RawSEIPanScanRect *current, SEIMessageState *sei) { int err, i; HEADER("Pan-Scan Rectangle"); ue(pan_scan_rect_id, 0, UINT32_MAX - 1); flag(pan_scan_rect_cancel_flag); if(!current->pan_scan_rect_cancel_flag) { ue(pan_scan_cnt_minus1, 0, 2); for(i = 0; i <= current->pan_scan_cnt_minus1; i++) { ses(pan_scan_rect_left_offset[i], INT32_MIN + 1, INT32_MAX, 1, i); ses(pan_scan_rect_right_offset[i], INT32_MIN + 1, INT32_MAX, 1, i); ses(pan_scan_rect_top_offset[i], INT32_MIN + 1, INT32_MAX, 1, i); ses(pan_scan_rect_bottom_offset[i], INT32_MIN + 1, INT32_MAX, 1, i); } ue(pan_scan_rect_repetition_period, 0, 16384); } return 0; } static int FUNC(sei_recovery_point)(CodedBitstreamContext *ctx, RWContext *rw, H264RawSEIRecoveryPoint *current, SEIMessageState *sei) { int err; HEADER("Recovery Point"); ue(recovery_frame_cnt, 0, 65535); flag(exact_match_flag); flag(broken_link_flag); u(2, changing_slice_group_idc, 0, 2); return 0; } static int FUNC(sei_display_orientation)(CodedBitstreamContext *ctx, RWContext *rw, H264RawSEIDisplayOrientation *current, SEIMessageState *sei) { int err; HEADER("Display Orientation"); flag(display_orientation_cancel_flag); if(!current->display_orientation_cancel_flag) { flag(hor_flip); flag(ver_flip); ub(16, anticlockwise_rotation); ue(display_orientation_repetition_period, 0, 16384); flag(display_orientation_extension_flag); } return 0; } static int FUNC(sei)(CodedBitstreamContext *ctx, RWContext *rw, H264RawSEI *current) { int err; HEADER("Supplemental Enhancement Information"); CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header, 1 << H264_NAL_SEI)); CHECK(FUNC_SEI(message_list)(ctx, rw, ¤t->message_list, 1)); CHECK(FUNC(rbsp_trailing_bits)(ctx, rw)); return 0; } static int FUNC(aud)(CodedBitstreamContext *ctx, RWContext *rw, H264RawAUD *current) { int err; HEADER("Access Unit Delimiter"); CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header, 1 << H264_NAL_AUD)); ub(3, primary_pic_type); CHECK(FUNC(rbsp_trailing_bits)(ctx, rw)); return 0; } static int FUNC(ref_pic_list_modification)(CodedBitstreamContext *ctx, RWContext *rw, H264RawSliceHeader *current) { CodedBitstreamH264Context *h264 = ctx->priv_data; const H264RawSPS *sps = h264->active_sps; int err, i, mopn; if(current->slice_type % 5 != 2 && current->slice_type % 5 != 4) { flag(ref_pic_list_modification_flag_l0); if(current->ref_pic_list_modification_flag_l0) { for(i = 0; i < H264_MAX_RPLM_COUNT; i++) { xue(modification_of_pic_nums_idc, current->rplm_l0[i].modification_of_pic_nums_idc, 0, 3, 0); mopn = current->rplm_l0[i].modification_of_pic_nums_idc; if(mopn == 3) break; if(mopn == 0 || mopn == 1) xue(abs_diff_pic_num_minus1, current->rplm_l0[i].abs_diff_pic_num_minus1, 0, (1 + current->field_pic_flag) * (1 << (sps->log2_max_frame_num_minus4 + 4)), 0); else if(mopn == 2) xue(long_term_pic_num, current->rplm_l0[i].long_term_pic_num, 0, sps->max_num_ref_frames - 1, 0); } } } if(current->slice_type % 5 == 1) { flag(ref_pic_list_modification_flag_l1); if(current->ref_pic_list_modification_flag_l1) { for(i = 0; i < H264_MAX_RPLM_COUNT; i++) { xue(modification_of_pic_nums_idc, current->rplm_l1[i].modification_of_pic_nums_idc, 0, 3, 0); mopn = current->rplm_l1[i].modification_of_pic_nums_idc; if(mopn == 3) break; if(mopn == 0 || mopn == 1) xue(abs_diff_pic_num_minus1, current->rplm_l1[i].abs_diff_pic_num_minus1, 0, (1 + current->field_pic_flag) * (1 << (sps->log2_max_frame_num_minus4 + 4)), 0); else if(mopn == 2) xue(long_term_pic_num, current->rplm_l1[i].long_term_pic_num, 0, sps->max_num_ref_frames - 1, 0); } } } return 0; } static int FUNC(pred_weight_table)(CodedBitstreamContext *ctx, RWContext *rw, H264RawSliceHeader *current) { CodedBitstreamH264Context *h264 = ctx->priv_data; const H264RawSPS *sps = h264->active_sps; int chroma; int err, i, j; ue(luma_log2_weight_denom, 0, 7); chroma = !sps->separate_colour_plane_flag && sps->chroma_format_idc != 0; if(chroma) ue(chroma_log2_weight_denom, 0, 7); for(i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) { flags(luma_weight_l0_flag[i], 1, i); if(current->luma_weight_l0_flag[i]) { ses(luma_weight_l0[i], -128, +127, 1, i); ses(luma_offset_l0[i], -128, +127, 1, i); } if(chroma) { flags(chroma_weight_l0_flag[i], 1, i); if(current->chroma_weight_l0_flag[i]) { for(j = 0; j < 2; j++) { ses(chroma_weight_l0[i][j], -128, +127, 2, i, j); ses(chroma_offset_l0[i][j], -128, +127, 2, i, j); } } } } if(current->slice_type % 5 == 1) { for(i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) { flags(luma_weight_l1_flag[i], 1, i); if(current->luma_weight_l1_flag[i]) { ses(luma_weight_l1[i], -128, +127, 1, i); ses(luma_offset_l1[i], -128, +127, 1, i); } if(chroma) { flags(chroma_weight_l1_flag[i], 1, i); if(current->chroma_weight_l1_flag[i]) { for(j = 0; j < 2; j++) { ses(chroma_weight_l1[i][j], -128, +127, 2, i, j); ses(chroma_offset_l1[i][j], -128, +127, 2, i, j); } } } } } return 0; } static int FUNC(dec_ref_pic_marking)(CodedBitstreamContext *ctx, RWContext *rw, H264RawSliceHeader *current, int idr_pic_flag) { CodedBitstreamH264Context *h264 = ctx->priv_data; const H264RawSPS *sps = h264->active_sps; int err, i; uint32_t mmco; if(idr_pic_flag) { flag(no_output_of_prior_pics_flag); flag(long_term_reference_flag); } else { flag(adaptive_ref_pic_marking_mode_flag); if(current->adaptive_ref_pic_marking_mode_flag) { for(i = 0; i < H264_MAX_MMCO_COUNT; i++) { xue(memory_management_control_operation, current->mmco[i].memory_management_control_operation, 0, 6, 0); mmco = current->mmco[i].memory_management_control_operation; if(mmco == 0) break; if(mmco == 1 || mmco == 3) xue(difference_of_pic_nums_minus1, current->mmco[i].difference_of_pic_nums_minus1, 0, INT32_MAX, 0); if(mmco == 2) xue(long_term_pic_num, current->mmco[i].long_term_pic_num, 0, sps->max_num_ref_frames - 1, 0); if(mmco == 3 || mmco == 6) xue(long_term_frame_idx, current->mmco[i].long_term_frame_idx, 0, sps->max_num_ref_frames - 1, 0); if(mmco == 4) xue(max_long_term_frame_idx_plus1, current->mmco[i].max_long_term_frame_idx_plus1, 0, sps->max_num_ref_frames, 0); } if(i == H264_MAX_MMCO_COUNT) { av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many " "memory management control operations.\n"); return AVERROR_INVALIDDATA; } } } return 0; } static int FUNC(slice_header)(CodedBitstreamContext *ctx, RWContext *rw, H264RawSliceHeader *current) { CodedBitstreamH264Context *h264 = ctx->priv_data; const H264RawSPS *sps; const H264RawPPS *pps; int err; int idr_pic_flag; int slice_type_i, slice_type_p, slice_type_b; int slice_type_si, slice_type_sp; HEADER("Slice Header"); CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header, 1 << H264_NAL_SLICE | 1 << H264_NAL_IDR_SLICE | 1 << H264_NAL_AUXILIARY_SLICE)); if(current->nal_unit_header.nal_unit_type == H264_NAL_AUXILIARY_SLICE) { if(!h264->last_slice_nal_unit_type) { av_log(ctx->log_ctx, AV_LOG_ERROR, "Auxiliary slice " "is not decodable without the main picture " "in the same access unit.\n"); return AVERROR_INVALIDDATA; } idr_pic_flag = h264->last_slice_nal_unit_type == H264_NAL_IDR_SLICE; } else { idr_pic_flag = current->nal_unit_header.nal_unit_type == H264_NAL_IDR_SLICE; } ue(first_mb_in_slice, 0, H264_MAX_MB_PIC_SIZE - 1); ue(slice_type, 0, 9); slice_type_i = current->slice_type % 5 == 2; slice_type_p = current->slice_type % 5 == 0; slice_type_b = current->slice_type % 5 == 1; slice_type_si = current->slice_type % 5 == 4; slice_type_sp = current->slice_type % 5 == 3; if(idr_pic_flag && !(slice_type_i || slice_type_si)) { av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid slice type %d " "for IDR picture.\n", current->slice_type); return AVERROR_INVALIDDATA; } ue(pic_parameter_set_id, 0, 255); pps = h264->pps[current->pic_parameter_set_id]; if(!pps) { av_log(ctx->log_ctx, AV_LOG_ERROR, "PPS id %d not available.\n", current->pic_parameter_set_id); return AVERROR_INVALIDDATA; } h264->active_pps = pps; sps = h264->sps[pps->seq_parameter_set_id]; if(!sps) { av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n", pps->seq_parameter_set_id); return AVERROR_INVALIDDATA; } h264->active_sps = sps; if(sps->separate_colour_plane_flag) u(2, colour_plane_id, 0, 2); ub(sps->log2_max_frame_num_minus4 + 4, frame_num); if(!sps->frame_mbs_only_flag) { flag(field_pic_flag); if(current->field_pic_flag) flag(bottom_field_flag); else infer(bottom_field_flag, 0); } else { infer(field_pic_flag, 0); infer(bottom_field_flag, 0); } if(idr_pic_flag) ue(idr_pic_id, 0, 65535); if(sps->pic_order_cnt_type == 0) { ub(sps->log2_max_pic_order_cnt_lsb_minus4 + 4, pic_order_cnt_lsb); if(pps->bottom_field_pic_order_in_frame_present_flag && !current->field_pic_flag) se(delta_pic_order_cnt_bottom, INT32_MIN + 1, INT32_MAX); } else if(sps->pic_order_cnt_type == 1) { if(!sps->delta_pic_order_always_zero_flag) { se(delta_pic_order_cnt[0], INT32_MIN + 1, INT32_MAX); if(pps->bottom_field_pic_order_in_frame_present_flag && !current->field_pic_flag) se(delta_pic_order_cnt[1], INT32_MIN + 1, INT32_MAX); else infer(delta_pic_order_cnt[1], 0); } else { infer(delta_pic_order_cnt[0], 0); infer(delta_pic_order_cnt[1], 0); } } if(pps->redundant_pic_cnt_present_flag) ue(redundant_pic_cnt, 0, 127); else infer(redundant_pic_cnt, 0); if(current->nal_unit_header.nal_unit_type != H264_NAL_AUXILIARY_SLICE && !current->redundant_pic_cnt) h264->last_slice_nal_unit_type = current->nal_unit_header.nal_unit_type; if(slice_type_b) flag(direct_spatial_mv_pred_flag); if(slice_type_p || slice_type_sp || slice_type_b) { flag(num_ref_idx_active_override_flag); if(current->num_ref_idx_active_override_flag) { ue(num_ref_idx_l0_active_minus1, 0, 31); if(slice_type_b) ue(num_ref_idx_l1_active_minus1, 0, 31); } else { infer(num_ref_idx_l0_active_minus1, pps->num_ref_idx_l0_default_active_minus1); infer(num_ref_idx_l1_active_minus1, pps->num_ref_idx_l1_default_active_minus1); } } if(current->nal_unit_header.nal_unit_type == 20 || current->nal_unit_header.nal_unit_type == 21) { av_log(ctx->log_ctx, AV_LOG_ERROR, "MVC / 3DAVC not supported.\n"); return AVERROR_PATCHWELCOME; } else { CHECK(FUNC(ref_pic_list_modification)(ctx, rw, current)); } if((pps->weighted_pred_flag && (slice_type_p || slice_type_sp)) || (pps->weighted_bipred_idc == 1 && slice_type_b)) { CHECK(FUNC(pred_weight_table)(ctx, rw, current)); } if(current->nal_unit_header.nal_ref_idc != 0) { CHECK(FUNC(dec_ref_pic_marking)(ctx, rw, current, idr_pic_flag)); } if(pps->entropy_coding_mode_flag && !slice_type_i && !slice_type_si) { ue(cabac_init_idc, 0, 2); } se(slice_qp_delta, -51 - 6 * sps->bit_depth_luma_minus8, +51 + 6 * sps->bit_depth_luma_minus8); if(slice_type_sp || slice_type_si) { if(slice_type_sp) flag(sp_for_switch_flag); se(slice_qs_delta, -51, +51); } if(pps->deblocking_filter_control_present_flag) { ue(disable_deblocking_filter_idc, 0, 2); if(current->disable_deblocking_filter_idc != 1) { se(slice_alpha_c0_offset_div2, -6, +6); se(slice_beta_offset_div2, -6, +6); } else { infer(slice_alpha_c0_offset_div2, 0); infer(slice_beta_offset_div2, 0); } } else { infer(disable_deblocking_filter_idc, 0); infer(slice_alpha_c0_offset_div2, 0); infer(slice_beta_offset_div2, 0); } if(pps->num_slice_groups_minus1 > 0 && pps->slice_group_map_type >= 3 && pps->slice_group_map_type <= 5) { unsigned int pic_size, max, bits; pic_size = (sps->pic_width_in_mbs_minus1 + 1) * (sps->pic_height_in_map_units_minus1 + 1); max = (pic_size + pps->slice_group_change_rate_minus1) / (pps->slice_group_change_rate_minus1 + 1); bits = av_ceil_log2(max + 1); u(bits, slice_group_change_cycle, 0, max); } if(pps->entropy_coding_mode_flag) { while(byte_alignment(rw)) fixed(1, cabac_alignment_one_bit, 1); } return 0; } static int FUNC(filler)(CodedBitstreamContext *ctx, RWContext *rw, H264RawFiller *current) { int err; HEADER("Filler Data"); CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header, 1 << H264_NAL_FILLER_DATA)); #ifdef READ while(show_bits(rw, 8) == 0xff) { fixed(8, ff_byte, 0xff); ++current->filler_size; } #else { uint32_t i; for(i = 0; i < current->filler_size; i++) fixed(8, ff_byte, 0xff); } #endif CHECK(FUNC(rbsp_trailing_bits)(ctx, rw)); return 0; } static int FUNC(end_of_sequence)(CodedBitstreamContext *ctx, RWContext *rw, H264RawNALUnitHeader *current) { HEADER("End of Sequence"); return FUNC(nal_unit_header)(ctx, rw, current, 1 << H264_NAL_END_SEQUENCE); } static int FUNC(end_of_stream)(CodedBitstreamContext *ctx, RWContext *rw, H264RawNALUnitHeader *current) { HEADER("End of Stream"); return FUNC(nal_unit_header)(ctx, rw, current, 1 << H264_NAL_END_STREAM); }