499 lines
18 KiB
C
499 lines
18 KiB
C
/*
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**
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** Copyright 2012 The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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#include "include/h264bitstream.h"
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//7.3.2.11 RBSP trailing bits syntax
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void read_rbsp_trailing_bits(bs_t* b)
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{
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/* rbsp_stop_one_bit */ bs_skip_u(b, 1);
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while ( !bs_byte_aligned(b) )
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{
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/* rbsp_alignment_zero_bit */ bs_skip_u(b, 1);
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}
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}
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//7.3.2.11 RBSP trailing bits syntax
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void write_rbsp_trailing_bits(bs_t* b)
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{
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/* rbsp_stop_one_bit */ bs_write_u(b, 1, 1);
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while ( !bs_byte_aligned(b) )
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{
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/* rbsp_alignment_zero_bit */ bs_write_u(b, 1, 0);
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}
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}
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//7.3.2.1.1 Scaling list syntax
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void read_scaling_list(bs_t* b, int* scalingList, int sizeOfScalingList, int* useDefaultScalingMatrixFlag )
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{
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// NOTE need to be able to set useDefaultScalingMatrixFlag when reading, hence passing as pointer
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int lastScale = 8;
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int nextScale = 8;
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int delta_scale;
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for ( int j = 0; j < sizeOfScalingList; j++ )
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{
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if ( nextScale != 0 )
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{
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if ( 0 )
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{
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nextScale = scalingList[ j ];
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if (useDefaultScalingMatrixFlag[0]) { nextScale = 0; }
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delta_scale = (nextScale - lastScale) % 256 ;
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}
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delta_scale = bs_read_se(b);
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if ( 1 )
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{
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nextScale = ( lastScale + delta_scale + 256 ) % 256;
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useDefaultScalingMatrixFlag[0] = ( j == 0 && nextScale == 0 );
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}
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}
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if ( 1 )
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{
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scalingList[ j ] = ( nextScale == 0 ) ? lastScale : nextScale;
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}
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lastScale = scalingList[ j ];
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}
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}
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//7.3.2.1.1 Scaling list syntax
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void write_scaling_list(bs_t* b, int* scalingList, int sizeOfScalingList, int* useDefaultScalingMatrixFlag )
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{
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// NOTE need to be able to set useDefaultScalingMatrixFlag when reading, hence passing as pointer
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int lastScale = 8;
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int nextScale = 8;
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int delta_scale;
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for ( int j = 0; j < sizeOfScalingList; j++ )
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{
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if ( nextScale != 0 )
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{
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if ( 1 )
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{
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nextScale = scalingList[ j ];
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if (useDefaultScalingMatrixFlag[0]) { nextScale = 0; }
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delta_scale = (nextScale - lastScale) % 256 ;
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}
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bs_write_se(b, delta_scale);
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if ( 0 )
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{
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nextScale = ( lastScale + delta_scale + 256 ) % 256;
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useDefaultScalingMatrixFlag[0] = ( j == 0 && nextScale == 0 );
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}
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}
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if ( 0 )
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{
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scalingList[ j ] = ( nextScale == 0 ) ? lastScale : nextScale;
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}
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lastScale = scalingList[ j ];
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}
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}
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//Appendix E.1.2 HRD parameters syntax
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void read_hrd_parameters(hrd_t* hrd, bs_t* b)
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{
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hrd->cpb_cnt_minus1 = bs_read_ue(b);
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hrd->bit_rate_scale = bs_read_u(b, 4);
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hrd->cpb_size_scale = bs_read_u(b, 4);
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for ( int SchedSelIdx = 0; SchedSelIdx <= hrd->cpb_cnt_minus1; SchedSelIdx++ )
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{
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hrd->bit_rate_value_minus1[ SchedSelIdx ] = bs_read_ue(b);
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hrd->cpb_size_value_minus1[ SchedSelIdx ] = bs_read_ue(b);
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hrd->cbr_flag[ SchedSelIdx ] = bs_read_u1(b);
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}
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hrd->initial_cpb_removal_delay_length_minus1 = bs_read_u(b, 5);
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hrd->cpb_removal_delay_length_minus1 = bs_read_u(b, 5);
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hrd->dpb_output_delay_length_minus1 = bs_read_u(b, 5);
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hrd->time_offset_length = bs_read_u(b, 5);
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}
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//Appendix E.1.2 HRD parameters syntax
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void write_hrd_parameters(hrd_t* hrd, bs_t* b)
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{
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bs_write_ue(b, hrd->cpb_cnt_minus1);
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bs_write_u(b, 4, hrd->bit_rate_scale);
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bs_write_u(b, 4, hrd->cpb_size_scale);
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for ( int SchedSelIdx = 0; SchedSelIdx <= hrd->cpb_cnt_minus1; SchedSelIdx++ )
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{
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bs_write_ue(b, hrd->bit_rate_value_minus1[ SchedSelIdx ]);
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bs_write_ue(b, hrd->cpb_size_value_minus1[ SchedSelIdx ]);
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bs_write_u1(b, hrd->cbr_flag[ SchedSelIdx ]);
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}
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bs_write_u(b, 5, hrd->initial_cpb_removal_delay_length_minus1);
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bs_write_u(b, 5, hrd->cpb_removal_delay_length_minus1);
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bs_write_u(b, 5, hrd->dpb_output_delay_length_minus1);
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bs_write_u(b, 5, hrd->time_offset_length);
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}
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//Appendix E.1.1 VUI parameters syntax
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void read_vui_parameters(sps_t* sps, bs_t* b)
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{
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sps->vui.aspect_ratio_info_present_flag = bs_read_u1(b);
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if ( sps->vui.aspect_ratio_info_present_flag )
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{
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sps->vui.aspect_ratio_idc = bs_read_u8(b);
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if ( sps->vui.aspect_ratio_idc == SAR_Extended )
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{
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sps->vui.sar_width = bs_read_u(b, 16);
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sps->vui.sar_height = bs_read_u(b, 16);
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}
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}
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sps->vui.overscan_info_present_flag = bs_read_u1(b);
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if ( sps->vui.overscan_info_present_flag )
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{
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sps->vui.overscan_appropriate_flag = bs_read_u1(b);
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}
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sps->vui.video_signal_type_present_flag = bs_read_u1(b);
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if ( sps->vui.video_signal_type_present_flag )
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{
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sps->vui.video_format = bs_read_u(b, 3);
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sps->vui.video_full_range_flag = bs_read_u1(b);
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sps->vui.colour_description_present_flag = bs_read_u1(b);
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if ( sps->vui.colour_description_present_flag )
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{
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sps->vui.colour_primaries = bs_read_u8(b);
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sps->vui.transfer_characteristics = bs_read_u8(b);
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sps->vui.matrix_coefficients = bs_read_u8(b);
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}
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}
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sps->vui.chroma_loc_info_present_flag = bs_read_u1(b);
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if ( sps->vui.chroma_loc_info_present_flag )
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{
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sps->vui.chroma_sample_loc_type_top_field = bs_read_ue(b);
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sps->vui.chroma_sample_loc_type_bottom_field = bs_read_ue(b);
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}
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sps->vui.timing_info_present_flag = bs_read_u1(b);
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if ( sps->vui.timing_info_present_flag )
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{
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sps->vui.num_units_in_tick = bs_read_u(b, 32);
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sps->vui.time_scale = bs_read_u(b, 32);
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sps->vui.fixed_frame_rate_flag = bs_read_u1(b);
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}
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sps->vui.nal_hrd_parameters_present_flag = bs_read_u1(b);
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if ( sps->vui.nal_hrd_parameters_present_flag )
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{
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read_hrd_parameters(&sps->hrd_nal, b);
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}
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sps->vui.vcl_hrd_parameters_present_flag = bs_read_u1(b);
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if ( sps->vui.vcl_hrd_parameters_present_flag )
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{
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read_hrd_parameters(&sps->hrd_vcl, b);
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}
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if ( sps->vui.nal_hrd_parameters_present_flag || sps->vui.vcl_hrd_parameters_present_flag )
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{
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sps->vui.low_delay_hrd_flag = bs_read_u1(b);
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}
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sps->vui.pic_struct_present_flag = bs_read_u1(b);
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sps->vui.bitstream_restriction_flag = bs_read_u1(b);
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if ( sps->vui.bitstream_restriction_flag )
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{
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sps->vui.motion_vectors_over_pic_boundaries_flag = bs_read_u1(b);
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sps->vui.max_bytes_per_pic_denom = bs_read_ue(b);
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sps->vui.max_bits_per_mb_denom = bs_read_ue(b);
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sps->vui.log2_max_mv_length_horizontal = bs_read_ue(b);
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sps->vui.log2_max_mv_length_vertical = bs_read_ue(b);
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sps->vui.num_reorder_frames = bs_read_ue(b);
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sps->vui.max_dec_frame_buffering = bs_read_ue(b);
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}
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}
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//7.3.2.1 Sequence parameter set RBSP syntax
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void read_seq_parameter_set_rbsp(sps_t* sps, bs_t* b)
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{
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int i;
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if ( 1 )
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{
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memset(sps, 0, sizeof(sps_t));
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sps->chroma_format_idc = 1;
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}
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sps->profile_idc = bs_read_u8(b);
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sps->constraint_set0_flag = bs_read_u1(b);
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sps->constraint_set1_flag = bs_read_u1(b);
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sps->constraint_set2_flag = bs_read_u1(b);
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sps->constraint_set3_flag = bs_read_u1(b);
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sps->constraint_set4_flag = bs_read_u1(b);
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sps->constraint_set5_flag = bs_read_u1(b);
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/* reserved_zero_2bits */ bs_skip_u(b, 2);
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sps->level_idc = bs_read_u8(b);
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sps->seq_parameter_set_id = bs_read_ue(b);
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if ( sps->profile_idc == 100 || sps->profile_idc == 110 ||
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sps->profile_idc == 122 || sps->profile_idc == 244 ||
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sps->profile_idc == 44 || sps->profile_idc == 83 ||
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sps->profile_idc == 86 || sps->profile_idc == 118 ||
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sps->profile_idc == 128 || sps->profile_idc == 138 ||
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sps->profile_idc == 139 || sps->profile_idc == 134
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)
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{
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sps->chroma_format_idc = bs_read_ue(b);
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if ( sps->chroma_format_idc == 3 )
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{
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sps->residual_colour_transform_flag = bs_read_u1(b);
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}
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sps->bit_depth_luma_minus8 = bs_read_ue(b);
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sps->bit_depth_chroma_minus8 = bs_read_ue(b);
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sps->qpprime_y_zero_transform_bypass_flag = bs_read_u1(b);
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sps->seq_scaling_matrix_present_flag = bs_read_u1(b);
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if ( sps->seq_scaling_matrix_present_flag )
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{
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for ( i = 0; i < ((sps->chroma_format_idc != 3) ? 8 : 12); i++ )
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{
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sps->seq_scaling_list_present_flag[ i ] = bs_read_u1(b);
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if ( sps->seq_scaling_list_present_flag[ i ] )
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{
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if ( i < 6 )
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{
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read_scaling_list( b, sps->ScalingList4x4[ i ], 16,
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&( sps->UseDefaultScalingMatrix4x4Flag[ i ] ) );
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}
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else
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{
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read_scaling_list( b, sps->ScalingList8x8[ i - 6 ], 64,
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&( sps->UseDefaultScalingMatrix8x8Flag[ i - 6 ] ) );
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}
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}
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}
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}
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}
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sps->log2_max_frame_num_minus4 = bs_read_ue(b);
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sps->pic_order_cnt_type = bs_read_ue(b);
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if ( sps->pic_order_cnt_type == 0 )
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{
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sps->log2_max_pic_order_cnt_lsb_minus4 = bs_read_ue(b);
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}
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else if ( sps->pic_order_cnt_type == 1 )
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{
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sps->delta_pic_order_always_zero_flag = bs_read_u1(b);
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sps->offset_for_non_ref_pic = bs_read_se(b);
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sps->offset_for_top_to_bottom_field = bs_read_se(b);
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sps->num_ref_frames_in_pic_order_cnt_cycle = bs_read_ue(b);
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for ( i = 0; i < sps->num_ref_frames_in_pic_order_cnt_cycle; i++ )
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{
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sps->offset_for_ref_frame[ i ] = bs_read_se(b);
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}
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}
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sps->num_ref_frames = bs_read_ue(b);
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sps->gaps_in_frame_num_value_allowed_flag = bs_read_u1(b);
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sps->pic_width_in_mbs_minus1 = bs_read_ue(b);
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sps->pic_height_in_map_units_minus1 = bs_read_ue(b);
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sps->frame_mbs_only_flag = bs_read_u1(b);
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if ( !sps->frame_mbs_only_flag )
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{
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sps->mb_adaptive_frame_field_flag = bs_read_u1(b);
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}
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sps->direct_8x8_inference_flag = bs_read_u1(b);
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sps->frame_cropping_flag = bs_read_u1(b);
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if ( sps->frame_cropping_flag )
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{
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sps->frame_crop_left_offset = bs_read_ue(b);
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sps->frame_crop_right_offset = bs_read_ue(b);
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sps->frame_crop_top_offset = bs_read_ue(b);
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sps->frame_crop_bottom_offset = bs_read_ue(b);
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}
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sps->vui_parameters_present_flag = bs_read_u1(b);
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if ( sps->vui_parameters_present_flag )
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{
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read_vui_parameters(sps, b);
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}
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}
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//Appendix E.1.1 VUI parameters syntax
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void write_vui_parameters(sps_t* sps, bs_t* b)
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{
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bs_write_u1(b, sps->vui.aspect_ratio_info_present_flag);
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if ( sps->vui.aspect_ratio_info_present_flag )
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{
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bs_write_u8(b, sps->vui.aspect_ratio_idc);
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if ( sps->vui.aspect_ratio_idc == SAR_Extended )
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{
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bs_write_u(b, 16, sps->vui.sar_width);
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bs_write_u(b, 16, sps->vui.sar_height);
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}
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}
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bs_write_u1(b, sps->vui.overscan_info_present_flag);
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if ( sps->vui.overscan_info_present_flag )
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{
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bs_write_u1(b, sps->vui.overscan_appropriate_flag);
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}
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bs_write_u1(b, sps->vui.video_signal_type_present_flag);
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if ( sps->vui.video_signal_type_present_flag )
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{
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bs_write_u(b, 3, sps->vui.video_format);
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bs_write_u1(b, sps->vui.video_full_range_flag);
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bs_write_u1(b, sps->vui.colour_description_present_flag);
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if ( sps->vui.colour_description_present_flag )
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{
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bs_write_u8(b, sps->vui.colour_primaries);
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bs_write_u8(b, sps->vui.transfer_characteristics);
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bs_write_u8(b, sps->vui.matrix_coefficients);
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}
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}
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bs_write_u1(b, sps->vui.chroma_loc_info_present_flag);
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if ( sps->vui.chroma_loc_info_present_flag )
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{
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bs_write_ue(b, sps->vui.chroma_sample_loc_type_top_field);
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bs_write_ue(b, sps->vui.chroma_sample_loc_type_bottom_field);
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}
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bs_write_u1(b, sps->vui.timing_info_present_flag);
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if ( sps->vui.timing_info_present_flag )
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{
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bs_write_u(b, 32, sps->vui.num_units_in_tick);
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bs_write_u(b, 32, sps->vui.time_scale);
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bs_write_u1(b, sps->vui.fixed_frame_rate_flag);
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}
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bs_write_u1(b, sps->vui.nal_hrd_parameters_present_flag);
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if ( sps->vui.nal_hrd_parameters_present_flag )
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{
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write_hrd_parameters(&sps->hrd_nal, b);
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}
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bs_write_u1(b, sps->vui.vcl_hrd_parameters_present_flag);
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if ( sps->vui.vcl_hrd_parameters_present_flag )
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{
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write_hrd_parameters(&sps->hrd_vcl, b);
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}
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if ( sps->vui.nal_hrd_parameters_present_flag || sps->vui.vcl_hrd_parameters_present_flag )
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{
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bs_write_u1(b, sps->vui.low_delay_hrd_flag);
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}
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bs_write_u1(b, sps->vui.pic_struct_present_flag);
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bs_write_u1(b, sps->vui.bitstream_restriction_flag);
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if ( sps->vui.bitstream_restriction_flag )
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{
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bs_write_u1(b, sps->vui.motion_vectors_over_pic_boundaries_flag);
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bs_write_ue(b, sps->vui.max_bytes_per_pic_denom);
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bs_write_ue(b, sps->vui.max_bits_per_mb_denom);
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bs_write_ue(b, sps->vui.log2_max_mv_length_horizontal);
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bs_write_ue(b, sps->vui.log2_max_mv_length_vertical);
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bs_write_ue(b, sps->vui.num_reorder_frames);
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bs_write_ue(b, sps->vui.max_dec_frame_buffering);
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}
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}
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//7.3.2.1 Sequence parameter set RBSP syntax
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void write_seq_parameter_set_rbsp(sps_t* sps, bs_t* b)
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{
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int i;
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if ( 0 )
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{
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memset(sps, 0, sizeof(sps_t));
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sps->chroma_format_idc = 1;
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}
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bs_write_u8(b, sps->profile_idc);
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bs_write_u1(b, sps->constraint_set0_flag);
|
|
bs_write_u1(b, sps->constraint_set1_flag);
|
|
bs_write_u1(b, sps->constraint_set2_flag);
|
|
bs_write_u1(b, sps->constraint_set3_flag);
|
|
bs_write_u1(b, sps->constraint_set4_flag);
|
|
bs_write_u1(b, sps->constraint_set5_flag);
|
|
/* reserved_zero_2bits */ bs_write_u(b, 2, 0);
|
|
bs_write_u8(b, sps->level_idc);
|
|
bs_write_ue(b, sps->seq_parameter_set_id);
|
|
|
|
if ( sps->profile_idc == 100 || sps->profile_idc == 110 ||
|
|
sps->profile_idc == 122 || sps->profile_idc == 244 ||
|
|
sps->profile_idc == 44 || sps->profile_idc == 83 ||
|
|
sps->profile_idc == 86 || sps->profile_idc == 118 ||
|
|
sps->profile_idc == 128 || sps->profile_idc == 138 ||
|
|
sps->profile_idc == 139 || sps->profile_idc == 134
|
|
)
|
|
{
|
|
bs_write_ue(b, sps->chroma_format_idc);
|
|
if ( sps->chroma_format_idc == 3 )
|
|
{
|
|
bs_write_u1(b, sps->residual_colour_transform_flag);
|
|
}
|
|
bs_write_ue(b, sps->bit_depth_luma_minus8);
|
|
bs_write_ue(b, sps->bit_depth_chroma_minus8);
|
|
bs_write_u1(b, sps->qpprime_y_zero_transform_bypass_flag);
|
|
bs_write_u1(b, sps->seq_scaling_matrix_present_flag);
|
|
if ( sps->seq_scaling_matrix_present_flag )
|
|
{
|
|
for ( i = 0; i < 8; i++ )
|
|
{
|
|
bs_write_u1(b, sps->seq_scaling_list_present_flag[ i ]);
|
|
if ( sps->seq_scaling_list_present_flag[ i ] )
|
|
{
|
|
if ( i < 6 )
|
|
{
|
|
write_scaling_list( b, sps->ScalingList4x4[ i ], 16,
|
|
&( sps->UseDefaultScalingMatrix4x4Flag[ i ] ) );
|
|
}
|
|
else
|
|
{
|
|
write_scaling_list( b, sps->ScalingList8x8[ i - 6 ], 64,
|
|
&( sps->UseDefaultScalingMatrix8x8Flag[ i - 6 ] ) );
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
bs_write_ue(b, sps->log2_max_frame_num_minus4);
|
|
bs_write_ue(b, sps->pic_order_cnt_type);
|
|
if ( sps->pic_order_cnt_type == 0 )
|
|
{
|
|
bs_write_ue(b, sps->log2_max_pic_order_cnt_lsb_minus4);
|
|
}
|
|
else if ( sps->pic_order_cnt_type == 1 )
|
|
{
|
|
bs_write_u1(b, sps->delta_pic_order_always_zero_flag);
|
|
bs_write_se(b, sps->offset_for_non_ref_pic);
|
|
bs_write_se(b, sps->offset_for_top_to_bottom_field);
|
|
bs_write_ue(b, sps->num_ref_frames_in_pic_order_cnt_cycle);
|
|
for ( i = 0; i < sps->num_ref_frames_in_pic_order_cnt_cycle; i++ )
|
|
{
|
|
bs_write_se(b, sps->offset_for_ref_frame[ i ]);
|
|
}
|
|
}
|
|
bs_write_ue(b, sps->num_ref_frames);
|
|
bs_write_u1(b, sps->gaps_in_frame_num_value_allowed_flag);
|
|
bs_write_ue(b, sps->pic_width_in_mbs_minus1);
|
|
bs_write_ue(b, sps->pic_height_in_map_units_minus1);
|
|
bs_write_u1(b, sps->frame_mbs_only_flag);
|
|
if ( !sps->frame_mbs_only_flag )
|
|
{
|
|
bs_write_u1(b, sps->mb_adaptive_frame_field_flag);
|
|
}
|
|
bs_write_u1(b, sps->direct_8x8_inference_flag);
|
|
bs_write_u1(b, sps->frame_cropping_flag);
|
|
if ( sps->frame_cropping_flag )
|
|
{
|
|
bs_write_ue(b, sps->frame_crop_left_offset);
|
|
bs_write_ue(b, sps->frame_crop_right_offset);
|
|
bs_write_ue(b, sps->frame_crop_top_offset);
|
|
bs_write_ue(b, sps->frame_crop_bottom_offset);
|
|
}
|
|
bs_write_u1(b, sps->vui_parameters_present_flag);
|
|
if ( sps->vui_parameters_present_flag )
|
|
{
|
|
write_vui_parameters(sps, b);
|
|
}
|
|
}
|