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[client] nal: added SLICE parser
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@ -50,6 +50,9 @@ struct NAL
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uint32_t pps_slice_groups_size;
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uint32_t * pps_slice_group_id;
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uint32_t pps_slice_group_id_size;
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bool slice_valid;
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NAL_SLICE slice;
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};
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bool nal_initialize(NAL * ptr)
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@ -496,6 +499,68 @@ static bool parse_nal_pps(NAL this, const uint8_t * src, size_t size, size_t * c
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pps->constrained_intra_pred_flag = get_bit(src, offset);
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pps->redundant_pic_cnt_present_flag = get_bit(src, offset);
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const bool extraData = get_bit(src, offset) == 0;
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--*offset;
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if (extraData)
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{
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pps->transform_8x8_mode_flag = get_bit(src, offset);
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pps->pic_scaling_matrix_present_flag = get_bit(src, offset);
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if (pps->pic_scaling_matrix_present_flag)
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{
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}
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pps->second_chroma_qp_index_offset = decode_s_golomb(src, offset);
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}
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#ifdef DEBUG_NAL
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DEBUG_INFO("PPS:\n"
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"pic_parameter_set_id : %u\n"
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"seq_parameter_set_id : %u\n"
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"entropy_coding_mode_flag : %u\n"
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"pic_order_present_flag : %u\n"
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"num_slice_groups_minus1 : %u\n"
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"slice_group_map_type : %u\n"
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"slice_group_change_direction_flag : %u\n"
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"slice_group_change_rate_minus1 : %u\n"
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"pic_size_in_map_units_minus1 : %u\n"
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"num_ref_idx_l0_active_minus1 : %u\n"
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"num_ref_idx_l1_active_minus1 : %u\n"
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"weighted_pred_flag : %u\n"
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"weighted_bipred_idc : %u\n"
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"pic_init_qp_minus26 : %d\n"
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"pic_init_qs_minus26 : %d\n"
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"chroma_qp_index_offset : %d\n"
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"deblocking_filter_control_present_flag: %u\n"
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"constrained_intra_pred_flag : %u\n"
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"redundant_pic_cnt_present_flag : %u\n"
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"transform_8x8_mode_flag : %u\n"
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"pic_scaling_matrix_present_flag : %u\n"
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"second_chroma_qp_index_offset : %u",
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pps->pic_parameter_set_id,
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pps->seq_parameter_set_id,
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pps->entropy_coding_mode_flag,
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pps->pic_order_present_flag,
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pps->num_slice_groups_minus1,
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pps->slice_group_map_type,
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pps->slice_group_change_direction_flag,
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pps->slice_group_change_rate_minus1,
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pps->pic_size_in_map_units_minus1,
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pps->num_ref_idx_l0_active_minus1,
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pps->num_ref_idx_l1_active_minus1,
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pps->weighted_pred_flag,
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pps->weighted_bipred_idc,
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pps->pic_init_qp_minus26,
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pps->pic_init_qs_minus26,
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pps->chroma_qp_index_offset,
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pps->deblocking_filter_control_present_flag,
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pps->constrained_intra_pred_flag,
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pps->redundant_pic_cnt_present_flag,
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pps->transform_8x8_mode_flag,
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pps->pic_scaling_matrix_present_flag,
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pps->second_chroma_qp_index_offset
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);
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#endif
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if (!parse_nal_trailing_bits(this, src, size, offset))
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return false;
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@ -503,23 +568,193 @@ static bool parse_nal_pps(NAL this, const uint8_t * src, size_t size, size_t * c
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return true;
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}
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static bool parse_nal_ref_pic_list_reordering(NAL this, const uint8_t * src, size_t size, size_t * const offset)
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{
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//TODO
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return false;
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}
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static bool parse_pred_weight_table(NAL this, const uint8_t * src, size_t size, size_t * const offset)
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{
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//TODO
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return false;
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}
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static bool parse_dec_ref_pic_marking(NAL this, const uint8_t * src, size_t size, size_t * const offset)
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{
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//TODO
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return false;
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}
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static bool parse_nal_coded_slice(
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NAL this,
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const uint8_t ref_idc,
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const uint8_t ref_unit_type,
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const uint8_t * src,
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size_t size,
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size_t * const offset
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)
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{
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if (!this->sps_valid || !this->pps_valid)
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return false;
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NAL_SLICE * slice = &this->slice;
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memset(slice, 0, sizeof(NAL_SLICE));
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slice->first_mb_in_slice = decode_u_golomb(src, offset);
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slice->slice_type = decode_u_golomb(src, offset);
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slice->pic_parameter_set_id = decode_u_golomb(src, offset);
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slice->frame_num = get_bits(src, offset, this->sps.log2_max_frame_num_minus4 + 4);
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if (!this->sps.frame_mbs_only_flag)
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{
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slice->field_pic_flag = get_bit(src, offset);
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if (slice->field_pic_flag)
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slice->bottom_field_flag = get_bit(src, offset);
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}
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if (ref_unit_type == 5)
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slice->idr_pic_id = decode_u_golomb(src, offset);
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if (this->sps.pic_order_cnt_type == 0)
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{
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slice->pic_order_cnt_lsb = get_bits(src, offset, this->sps.log2_max_pic_order_cnt_lsb_minus4 + 4);
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if (this->pps.pic_order_present_flag && !slice->field_pic_flag)
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slice->delta_pic_order_cnt_bottom = decode_s_golomb(src, offset);
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}
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else
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if (this->sps.pic_order_cnt_type == 1 && !this->sps.delta_pic_order_always_zero_flag)
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{
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slice->delta_pic_order_cnt[0] = decode_s_golomb(src, offset);
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if (this->pps.pic_order_present_flag && !slice->field_pic_flag)
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slice->delta_pic_order_cnt[1] = decode_s_golomb(src, offset);
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}
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if (this->pps.redundant_pic_cnt_present_flag)
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slice->redundant_pic_cnt = decode_u_golomb(src, offset);
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if (slice->slice_type == NAL_SLICE_TYPE_B)
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slice->direct_spatial_mv_pred_flag = get_bit(src, offset);
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if (slice->slice_type == NAL_SLICE_TYPE_P ||
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slice->slice_type == NAL_SLICE_TYPE_SP ||
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slice->slice_type == NAL_SLICE_TYPE_B)
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{
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slice->num_ref_idx_active_override_flag = get_bit(src, offset);
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if (slice->num_ref_idx_active_override_flag)
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{
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slice->num_ref_idx_l0_active_minus1 = decode_u_golomb(src, offset);
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if (slice->slice_type == NAL_SLICE_TYPE_B)
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slice->num_ref_idx_l1_active_minus1 = decode_u_golomb(src, offset);
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}
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}
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if (!parse_nal_ref_pic_list_reordering(this, src, size, offset))
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return false;
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if ((this->pps.weighted_pred_flag && (slice->slice_type == NAL_SLICE_TYPE_P || slice->slice_type == NAL_SLICE_TYPE_SP)) ||
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(this->pps.weighted_bipred_idc == 1 && slice->slice_type == NAL_SLICE_TYPE_B))
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{
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if (!parse_pred_weight_table(this, src, size, offset))
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return false;
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}
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if (ref_idc != 0)
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if (!parse_dec_ref_pic_marking(this, src, size, offset))
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return false;
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if (this->pps.entropy_coding_mode_flag && slice->slice_type != NAL_SLICE_TYPE_I && slice->slice_type != NAL_SLICE_TYPE_SI)
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slice->cabac_init_idc = decode_u_golomb(src, offset);
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slice->slice_qp_delta = decode_s_golomb(src, offset);
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if (slice->slice_type == NAL_SLICE_TYPE_SP || slice->slice_type == NAL_SLICE_TYPE_SI)
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{
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if (slice->slice_type == NAL_SLICE_TYPE_SP)
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slice->sp_for_switch_flag = get_bit(src, offset);
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slice->slice_qs_delta = decode_s_golomb(src, offset);
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}
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if (this->pps.deblocking_filter_control_present_flag)
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{
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slice->disable_deblocking_filter_idc = decode_u_golomb(src, offset);
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if (slice->disable_deblocking_filter_idc != 1)
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{
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slice->slice_alpha_c0_offset_div2 = decode_s_golomb(src, offset);
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slice->slice_beta_offset_div2 = decode_s_golomb(src, offset);
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}
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}
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if (this->pps.num_slice_groups_minus1 > 0 && this->pps.slice_group_map_type >= 3 && this->pps.slice_group_map_type <= 5)
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slice->slice_group_change_cycle = decode_u_golomb(src, offset);
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#ifdef DEBUG_NAL
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DEBUG_INFO("SLICE:\n"
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"first_mb_in_slice : %u\n"
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"slice_type : %u\n"
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"pic_parameter_set_id : %u\n"
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"frame_num : %u\n"
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"field_pic_flag : %u\n"
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"bottom_field_flag : %u\n"
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"idr_pic_id : %u\n"
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"pic_order_cnt_lsb : %u\n"
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"delta_pic_order_cnt_bottom : %d\n"
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"delta_pic_order_cnt[0] : %d\n"
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"delta_pic_order_cnt[1] : %d\n"
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"redundant_pic_cnt : %u\n"
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"direct_spatial_mv_pred_flag : %u\n"
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"num_ref_idx_active_override_flag: %u\n"
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"num_ref_idx_l0_active_minus1 : %u\n"
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"num_ref_idx_l1_active_minus1 : %u",
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slice->first_mb_in_slice,
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slice->slice_type,
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slice->pic_parameter_set_id,
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slice->frame_num,
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slice->field_pic_flag,
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slice->bottom_field_flag,
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slice->idr_pic_id,
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slice->pic_order_cnt_lsb,
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slice->delta_pic_order_cnt_bottom,
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slice->delta_pic_order_cnt[0],
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slice->delta_pic_order_cnt[1],
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slice->redundant_pic_cnt,
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slice->direct_spatial_mv_pred_flag,
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slice->num_ref_idx_active_override_flag,
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slice->num_ref_idx_l0_active_minus1,
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slice->num_ref_idx_l1_active_minus1
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);
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#endif
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if (!parse_nal_trailing_bits(this, src, size, offset))
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return false;
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this->slice_valid = true;
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return true;
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}
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bool nal_parse(NAL this, const uint8_t * src, size_t size)
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{
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#ifdef DEBUG_NAL
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static FILE * fd = NULL;
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if (!fd)
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fd = fopen("/tmp/stream.h264", "w");
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fwrite(src, size, 1, fd);
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fflush(fd);
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#endif
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const size_t bits = size << 4;
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size_t offset = 0;
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while(offset < bits)
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for(size_t i = 0; i < size - 4; ++i)
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{
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// look for the start header
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if (get_bits(src, &offset, 32) != 1)
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{
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offset -= 24;
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if (src[i++] != 0 || src[i++] != 0)
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continue;
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}
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if (src[i] == 0)
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++i;
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if (src[i++] != 1)
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continue;
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size_t offset = i << 3;
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DEBUG_INFO("nal @ %lu (%lu)", i, offset);
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// ensure the forbidden zero bit is not set
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if (get_bit(src, &offset) != 0)
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@ -528,12 +763,19 @@ bool nal_parse(NAL this, const uint8_t * src, size_t size)
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return false;
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}
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uint8_t nal_ref_idc = get_bits(src, &offset, 2);
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uint8_t nal_ref_unit_type = get_bits(src, &offset, 5);
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DEBUG_INFO("ref idc: %d, ref unit type: %d", nal_ref_idc, nal_ref_unit_type);
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uint8_t ref_idc = get_bits(src, &offset, 2);
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uint8_t ref_unit_type = get_bits(src, &offset, 5);
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DEBUG_INFO("ref idc: %d, ref unit type: %d", ref_idc, ref_unit_type);
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switch(nal_ref_unit_type)
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switch(ref_unit_type)
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{
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case NAL_TYPE_CODED_SLICE_IDR:
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case NAL_TYPE_CODED_SLICE_NON_IDR:
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case NAL_TYPE_CODED_SLICE_AUX:
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if (!parse_nal_coded_slice(this, ref_idc, ref_unit_type, src, size, &offset))
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return false;
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break;
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case NAL_TYPE_AUD:
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{
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this->primary_pic_type = get_bits(src, &offset, 3);
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@ -554,14 +796,14 @@ bool nal_parse(NAL this, const uint8_t * src, size_t size)
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break;
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default:
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DEBUG_ERROR("Unknown NAL ref unit type: %d", nal_ref_unit_type);
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DEBUG_ERROR("Unknown NAL ref unit type: %d", ref_unit_type);
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return false;
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}
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// byte align
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offset = (offset + 0x7) & ~0x7;
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i = offset >> 3;
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}
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DEBUG_INFO("return");
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return true;
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}
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@ -588,4 +830,13 @@ bool nal_get_pps(NAL this, const NAL_PPS ** pps)
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*pps = &this->pps;
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return true;
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}
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bool nal_get_slice(NAL this, const NAL_SLICE ** slice)
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{
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if (!this->slice_valid)
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return false;
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*slice = &this->slice;
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return true;
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}
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@ -21,9 +21,17 @@ Place, Suite 330, Boston, MA 02111-1307 USA
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#include <stdbool.h>
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#include <stdlib.h>
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#define NAL_TYPE_SPS 7
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#define NAL_TYPE_PPS 8
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#define NAL_TYPE_AUD 9
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#define NAL_TYPE_CODED_SLICE_NON_IDR 1
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#define NAL_TYPE_CODED_SLICE_DATA_PARTITION_A 2
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#define NAL_TYPE_CODED_SLICE_DATA_PARTITION_B 3
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#define NAL_TYPE_CODED_SLICE_DATA_PARTITION_C 4
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#define NAL_TYPE_CODED_SLICE_IDR 5
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#define NAL_TYPE_SPS 7
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#define NAL_TYPE_PPS 8
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#define NAL_TYPE_AUD 9
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#define NAL_TYPE_END_OF_SEQUENCE 10
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#define NAL_TYPE_END_OF_STREAM 11
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#define NAL_TYPE_CODED_SLICE_AUX 19
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#define IDC_PROFILE_BASELINE 66
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#define IDC_PROFILE_MAIN 77
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@ -45,6 +53,12 @@ Place, Suite 330, Boston, MA 02111-1307 USA
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#define NAL_PICTURE_TYPE_P 1
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#define NAL_PICTURE_TYPE_B 2
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#define NAL_SLICE_TYPE_P 0
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#define NAL_SLICE_TYPE_B 1
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#define NAL_SLICE_TYPE_I 2
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#define NAL_SLICE_TYPE_SP 3
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#define NAL_SLICE_TYPE_SI 4
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typedef struct NAL_SPS
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{
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uint8_t profile_idc;
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@ -186,9 +200,47 @@ typedef struct NAL_PPS
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uint8_t deblocking_filter_control_present_flag;
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uint8_t constrained_intra_pred_flag;
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uint8_t redundant_pic_cnt_present_flag;
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uint8_t transform_8x8_mode_flag;
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uint8_t pic_scaling_matrix_present_flag;
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uint8_t pic_scaling_list_present_flag[6];
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int32_t scaling_list_4x4[6];
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int32_t scaling_list_8x8[2];
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int32_t second_chroma_qp_index_offset;
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}
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NAL_PPS;
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typedef struct NAL_SLICE
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{
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uint32_t first_mb_in_slice;
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uint32_t slice_type;
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uint32_t pic_parameter_set_id;
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uint32_t frame_num;
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uint8_t field_pic_flag;
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uint8_t bottom_field_flag;
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uint32_t idr_pic_id;
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uint32_t pic_order_cnt_lsb;
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int32_t delta_pic_order_cnt_bottom;
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int32_t delta_pic_order_cnt[2];
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uint32_t redundant_pic_cnt;
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uint8_t direct_spatial_mv_pred_flag;
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uint8_t num_ref_idx_active_override_flag;
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uint32_t num_ref_idx_l0_active_minus1;
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uint32_t num_ref_idx_l1_active_minus1;
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//ref_pic_list_reordering
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//pred_weight_table
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//dec_ref_pic_marking
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uint32_t cabac_init_idc;
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int32_t slice_qp_delta;
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uint8_t sp_for_switch_flag;
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int32_t slice_qs_delta;
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uint32_t disable_deblocking_filter_idc;
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int32_t slice_alpha_c0_offset_div2;
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int32_t slice_beta_offset_div2;
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uint32_t slice_group_change_cycle;
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}
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NAL_SLICE;
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typedef struct NAL * NAL;
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bool nal_initialize (NAL * ptr);
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@ -196,5 +248,6 @@ void nal_deinitialize(NAL this );
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||||
bool nal_parse (NAL this, const uint8_t * src, size_t size);
|
||||
|
||||
bool nal_get_primary_picture_type(NAL this, uint8_t * pic_type);
|
||||
bool nal_get_sps(NAL this, const NAL_SPS ** sps);
|
||||
bool nal_get_pps(NAL this, const NAL_PPS ** pps);
|
||||
bool nal_get_sps (NAL this, const NAL_SPS ** sps );
|
||||
bool nal_get_pps (NAL this, const NAL_PPS ** pps );
|
||||
bool nal_get_slice(NAL this, const NAL_SLICE ** slice);
|
Loading…
Reference in New Issue
Block a user