mirror of https://git.ffmpeg.org/ffmpeg.git
1153 lines
38 KiB
C
1153 lines
38 KiB
C
/*
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* Copyright (c) 2014 Tim Walker <tdskywalker@gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavcodec/get_bits.h"
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#include "libavcodec/golomb.h"
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#include "libavcodec/hevc.h"
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#include "libavutil/intreadwrite.h"
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#include "avc.h"
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#include "avio.h"
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#include "hevc.h"
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#define MAX_SPATIAL_SEGMENTATION 4096 // max. value of u(12) field
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typedef struct HVCCNALUnitArray {
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uint8_t array_completeness;
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uint8_t NAL_unit_type;
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uint16_t numNalus;
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uint16_t *nalUnitLength;
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uint8_t **nalUnit;
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} HVCCNALUnitArray;
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typedef struct HEVCDecoderConfigurationRecord {
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uint8_t configurationVersion;
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uint8_t general_profile_space;
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uint8_t general_tier_flag;
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uint8_t general_profile_idc;
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uint32_t general_profile_compatibility_flags;
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uint64_t general_constraint_indicator_flags;
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uint8_t general_level_idc;
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uint16_t min_spatial_segmentation_idc;
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uint8_t parallelismType;
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uint8_t chromaFormat;
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uint8_t bitDepthLumaMinus8;
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uint8_t bitDepthChromaMinus8;
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uint16_t avgFrameRate;
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uint8_t constantFrameRate;
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uint8_t numTemporalLayers;
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uint8_t temporalIdNested;
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uint8_t lengthSizeMinusOne;
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uint8_t numOfArrays;
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HVCCNALUnitArray *array;
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} HEVCDecoderConfigurationRecord;
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typedef struct HVCCProfileTierLevel {
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uint8_t profile_space;
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uint8_t tier_flag;
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uint8_t profile_idc;
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uint32_t profile_compatibility_flags;
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uint64_t constraint_indicator_flags;
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uint8_t level_idc;
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} HVCCProfileTierLevel;
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static void hvcc_update_ptl(HEVCDecoderConfigurationRecord *hvcc,
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HVCCProfileTierLevel *ptl)
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{
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/*
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* The value of general_profile_space in all the parameter sets must be
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* identical.
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*/
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hvcc->general_profile_space = ptl->profile_space;
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/*
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* The level indication general_level_idc must indicate a level of
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* capability equal to or greater than the highest level indicated for the
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* highest tier in all the parameter sets.
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*/
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if (hvcc->general_tier_flag < ptl->tier_flag)
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hvcc->general_level_idc = ptl->level_idc;
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else
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hvcc->general_level_idc = FFMAX(hvcc->general_level_idc, ptl->level_idc);
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/*
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* The tier indication general_tier_flag must indicate a tier equal to or
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* greater than the highest tier indicated in all the parameter sets.
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*/
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hvcc->general_tier_flag = FFMAX(hvcc->general_tier_flag, ptl->tier_flag);
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/*
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* The profile indication general_profile_idc must indicate a profile to
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* which the stream associated with this configuration record conforms.
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*
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* If the sequence parameter sets are marked with different profiles, then
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* the stream may need examination to determine which profile, if any, the
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* entire stream conforms to. If the entire stream is not examined, or the
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* examination reveals that there is no profile to which the entire stream
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* conforms, then the entire stream must be split into two or more
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* sub-streams with separate configuration records in which these rules can
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* be met.
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*
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* Note: set the profile to the highest value for the sake of simplicity.
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*/
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hvcc->general_profile_idc = FFMAX(hvcc->general_profile_idc, ptl->profile_idc);
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/*
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* Each bit in general_profile_compatibility_flags may only be set if all
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* the parameter sets set that bit.
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*/
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hvcc->general_profile_compatibility_flags &= ptl->profile_compatibility_flags;
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/*
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* Each bit in general_constraint_indicator_flags may only be set if all
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* the parameter sets set that bit.
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*/
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hvcc->general_constraint_indicator_flags &= ptl->constraint_indicator_flags;
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}
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static void hvcc_parse_ptl(GetBitContext *gb,
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HEVCDecoderConfigurationRecord *hvcc,
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unsigned int max_sub_layers_minus1)
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{
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unsigned int i;
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HVCCProfileTierLevel general_ptl;
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uint8_t sub_layer_profile_present_flag[MAX_SUB_LAYERS];
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uint8_t sub_layer_level_present_flag[MAX_SUB_LAYERS];
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general_ptl.profile_space = get_bits(gb, 2);
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general_ptl.tier_flag = get_bits1(gb);
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general_ptl.profile_idc = get_bits(gb, 5);
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general_ptl.profile_compatibility_flags = get_bits_long(gb, 32);
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general_ptl.constraint_indicator_flags = get_bits64(gb, 48);
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general_ptl.level_idc = get_bits(gb, 8);
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hvcc_update_ptl(hvcc, &general_ptl);
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for (i = 0; i < max_sub_layers_minus1; i++) {
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sub_layer_profile_present_flag[i] = get_bits1(gb);
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sub_layer_level_present_flag[i] = get_bits1(gb);
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}
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if (max_sub_layers_minus1 > 0)
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for (i = max_sub_layers_minus1; i < 8; i++)
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skip_bits(gb, 2); // reserved_zero_2bits[i]
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for (i = 0; i < max_sub_layers_minus1; i++) {
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if (sub_layer_profile_present_flag[i]) {
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/*
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* sub_layer_profile_space[i] u(2)
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* sub_layer_tier_flag[i] u(1)
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* sub_layer_profile_idc[i] u(5)
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* sub_layer_profile_compatibility_flag[i][0..31] u(32)
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* sub_layer_progressive_source_flag[i] u(1)
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* sub_layer_interlaced_source_flag[i] u(1)
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* sub_layer_non_packed_constraint_flag[i] u(1)
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* sub_layer_frame_only_constraint_flag[i] u(1)
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* sub_layer_reserved_zero_44bits[i] u(44)
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*/
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skip_bits_long(gb, 32);
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skip_bits_long(gb, 32);
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skip_bits (gb, 24);
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}
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if (sub_layer_level_present_flag[i])
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skip_bits(gb, 8);
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}
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}
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static void skip_sub_layer_hrd_parameters(GetBitContext *gb,
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unsigned int cpb_cnt_minus1,
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uint8_t sub_pic_hrd_params_present_flag)
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{
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unsigned int i;
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for (i = 0; i <= cpb_cnt_minus1; i++) {
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get_ue_golomb_long(gb); // bit_rate_value_minus1
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get_ue_golomb_long(gb); // cpb_size_value_minus1
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if (sub_pic_hrd_params_present_flag) {
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get_ue_golomb_long(gb); // cpb_size_du_value_minus1
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get_ue_golomb_long(gb); // bit_rate_du_value_minus1
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}
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skip_bits1(gb); // cbr_flag
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}
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}
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static int skip_hrd_parameters(GetBitContext *gb, uint8_t cprms_present_flag,
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unsigned int max_sub_layers_minus1)
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{
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unsigned int i;
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uint8_t sub_pic_hrd_params_present_flag = 0;
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uint8_t nal_hrd_parameters_present_flag = 0;
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uint8_t vcl_hrd_parameters_present_flag = 0;
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if (cprms_present_flag) {
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nal_hrd_parameters_present_flag = get_bits1(gb);
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vcl_hrd_parameters_present_flag = get_bits1(gb);
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if (nal_hrd_parameters_present_flag ||
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vcl_hrd_parameters_present_flag) {
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sub_pic_hrd_params_present_flag = get_bits1(gb);
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if (sub_pic_hrd_params_present_flag)
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/*
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* tick_divisor_minus2 u(8)
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* du_cpb_removal_delay_increment_length_minus1 u(5)
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* sub_pic_cpb_params_in_pic_timing_sei_flag u(1)
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* dpb_output_delay_du_length_minus1 u(5)
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*/
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skip_bits(gb, 19);
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/*
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* bit_rate_scale u(4)
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* cpb_size_scale u(4)
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*/
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skip_bits(gb, 8);
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if (sub_pic_hrd_params_present_flag)
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skip_bits(gb, 4); // cpb_size_du_scale
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/*
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* initial_cpb_removal_delay_length_minus1 u(5)
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* au_cpb_removal_delay_length_minus1 u(5)
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* dpb_output_delay_length_minus1 u(5)
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*/
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skip_bits(gb, 15);
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}
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}
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for (i = 0; i <= max_sub_layers_minus1; i++) {
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unsigned int cpb_cnt_minus1 = 0;
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uint8_t low_delay_hrd_flag = 0;
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uint8_t fixed_pic_rate_within_cvs_flag = 0;
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uint8_t fixed_pic_rate_general_flag = get_bits1(gb);
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if (!fixed_pic_rate_general_flag)
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fixed_pic_rate_within_cvs_flag = get_bits1(gb);
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if (fixed_pic_rate_within_cvs_flag)
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get_ue_golomb_long(gb); // elemental_duration_in_tc_minus1
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else
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low_delay_hrd_flag = get_bits1(gb);
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if (!low_delay_hrd_flag) {
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cpb_cnt_minus1 = get_ue_golomb_long(gb);
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if (cpb_cnt_minus1 > 31)
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return AVERROR_INVALIDDATA;
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}
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if (nal_hrd_parameters_present_flag)
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skip_sub_layer_hrd_parameters(gb, cpb_cnt_minus1,
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sub_pic_hrd_params_present_flag);
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if (vcl_hrd_parameters_present_flag)
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skip_sub_layer_hrd_parameters(gb, cpb_cnt_minus1,
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sub_pic_hrd_params_present_flag);
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}
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return 0;
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}
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static void skip_timing_info(GetBitContext *gb)
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{
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skip_bits_long(gb, 32); // num_units_in_tick
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skip_bits_long(gb, 32); // time_scale
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if (get_bits1(gb)) // poc_proportional_to_timing_flag
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get_ue_golomb_long(gb); // num_ticks_poc_diff_one_minus1
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}
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static void hvcc_parse_vui(GetBitContext *gb,
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HEVCDecoderConfigurationRecord *hvcc,
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unsigned int max_sub_layers_minus1)
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{
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unsigned int min_spatial_segmentation_idc;
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if (get_bits1(gb)) // aspect_ratio_info_present_flag
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if (get_bits(gb, 8) == 255) // aspect_ratio_idc
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skip_bits_long(gb, 32); // sar_width u(16), sar_height u(16)
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if (get_bits1(gb)) // overscan_info_present_flag
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skip_bits1(gb); // overscan_appropriate_flag
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if (get_bits1(gb)) { // video_signal_type_present_flag
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skip_bits(gb, 4); // video_format u(3), video_full_range_flag u(1)
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if (get_bits1(gb)) // colour_description_present_flag
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/*
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* colour_primaries u(8)
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* transfer_characteristics u(8)
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* matrix_coeffs u(8)
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*/
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skip_bits(gb, 24);
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}
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if (get_bits1(gb)) { // chroma_loc_info_present_flag
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get_ue_golomb_long(gb); // chroma_sample_loc_type_top_field
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get_ue_golomb_long(gb); // chroma_sample_loc_type_bottom_field
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}
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/*
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* neutral_chroma_indication_flag u(1)
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* field_seq_flag u(1)
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* frame_field_info_present_flag u(1)
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*/
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skip_bits(gb, 3);
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if (get_bits1(gb)) { // default_display_window_flag
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get_ue_golomb_long(gb); // def_disp_win_left_offset
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get_ue_golomb_long(gb); // def_disp_win_right_offset
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get_ue_golomb_long(gb); // def_disp_win_top_offset
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get_ue_golomb_long(gb); // def_disp_win_bottom_offset
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}
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if (get_bits1(gb)) { // vui_timing_info_present_flag
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skip_timing_info(gb);
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if (get_bits1(gb)) // vui_hrd_parameters_present_flag
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skip_hrd_parameters(gb, 1, max_sub_layers_minus1);
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}
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if (get_bits1(gb)) { // bitstream_restriction_flag
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/*
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* tiles_fixed_structure_flag u(1)
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* motion_vectors_over_pic_boundaries_flag u(1)
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* restricted_ref_pic_lists_flag u(1)
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*/
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skip_bits(gb, 3);
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min_spatial_segmentation_idc = get_ue_golomb_long(gb);
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/*
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* unsigned int(12) min_spatial_segmentation_idc;
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*
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* The min_spatial_segmentation_idc indication must indicate a level of
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* spatial segmentation equal to or less than the lowest level of
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* spatial segmentation indicated in all the parameter sets.
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*/
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hvcc->min_spatial_segmentation_idc = FFMIN(hvcc->min_spatial_segmentation_idc,
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min_spatial_segmentation_idc);
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get_ue_golomb_long(gb); // max_bytes_per_pic_denom
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get_ue_golomb_long(gb); // max_bits_per_min_cu_denom
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get_ue_golomb_long(gb); // log2_max_mv_length_horizontal
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get_ue_golomb_long(gb); // log2_max_mv_length_vertical
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}
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}
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static void skip_sub_layer_ordering_info(GetBitContext *gb)
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{
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get_ue_golomb_long(gb); // max_dec_pic_buffering_minus1
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get_ue_golomb_long(gb); // max_num_reorder_pics
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get_ue_golomb_long(gb); // max_latency_increase_plus1
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}
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static int hvcc_parse_vps(GetBitContext *gb,
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HEVCDecoderConfigurationRecord *hvcc)
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{
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unsigned int vps_max_sub_layers_minus1;
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/*
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* vps_video_parameter_set_id u(4)
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* vps_reserved_three_2bits u(2)
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* vps_max_layers_minus1 u(6)
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*/
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skip_bits(gb, 12);
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vps_max_sub_layers_minus1 = get_bits(gb, 3);
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/*
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* numTemporalLayers greater than 1 indicates that the stream to which this
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* configuration record applies is temporally scalable and the contained
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* number of temporal layers (also referred to as temporal sub-layer or
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* sub-layer in ISO/IEC 23008-2) is equal to numTemporalLayers. Value 1
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* indicates that the stream is not temporally scalable. Value 0 indicates
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* that it is unknown whether the stream is temporally scalable.
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*/
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hvcc->numTemporalLayers = FFMAX(hvcc->numTemporalLayers,
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vps_max_sub_layers_minus1 + 1);
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/*
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* vps_temporal_id_nesting_flag u(1)
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* vps_reserved_0xffff_16bits u(16)
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*/
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skip_bits(gb, 17);
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hvcc_parse_ptl(gb, hvcc, vps_max_sub_layers_minus1);
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/* nothing useful for hvcC past this point */
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return 0;
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}
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static void skip_scaling_list_data(GetBitContext *gb)
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{
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int i, j, k, num_coeffs;
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for (i = 0; i < 4; i++)
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for (j = 0; j < (i == 3 ? 2 : 6); j++)
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if (!get_bits1(gb)) // scaling_list_pred_mode_flag[i][j]
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get_ue_golomb_long(gb); // scaling_list_pred_matrix_id_delta[i][j]
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else {
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num_coeffs = FFMIN(64, 1 << (4 + (i << 1)));
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if (i > 1)
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get_se_golomb_long(gb); // scaling_list_dc_coef_minus8[i-2][j]
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for (k = 0; k < num_coeffs; k++)
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get_se_golomb_long(gb); // scaling_list_delta_coef
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}
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}
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static int parse_rps(GetBitContext *gb, unsigned int rps_idx,
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unsigned int num_rps,
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unsigned int num_delta_pocs[MAX_SHORT_TERM_RPS_COUNT])
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{
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unsigned int i;
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if (rps_idx && get_bits1(gb)) { // inter_ref_pic_set_prediction_flag
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/* this should only happen for slice headers, and this isn't one */
|
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if (rps_idx >= num_rps)
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return AVERROR_INVALIDDATA;
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skip_bits1 (gb); // delta_rps_sign
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get_ue_golomb_long(gb); // abs_delta_rps_minus1
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num_delta_pocs[rps_idx] = 0;
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|
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/*
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* From libavcodec/hevc_ps.c:
|
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*
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* if (is_slice_header) {
|
||
* //foo
|
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* } else
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||
* rps_ridx = &sps->st_rps[rps - sps->st_rps - 1];
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*
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* where:
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* rps: &sps->st_rps[rps_idx]
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* sps->st_rps: &sps->st_rps[0]
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||
* is_slice_header: rps_idx == num_rps
|
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*
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* thus:
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* if (num_rps != rps_idx)
|
||
* rps_ridx = &sps->st_rps[rps_idx - 1];
|
||
*
|
||
* NumDeltaPocs[RefRpsIdx]: num_delta_pocs[rps_idx - 1]
|
||
*/
|
||
for (i = 0; i <= num_delta_pocs[rps_idx - 1]; i++) {
|
||
uint8_t use_delta_flag = 0;
|
||
uint8_t used_by_curr_pic_flag = get_bits1(gb);
|
||
if (!used_by_curr_pic_flag)
|
||
use_delta_flag = get_bits1(gb);
|
||
|
||
if (used_by_curr_pic_flag || use_delta_flag)
|
||
num_delta_pocs[rps_idx]++;
|
||
}
|
||
} else {
|
||
unsigned int num_negative_pics = get_ue_golomb_long(gb);
|
||
unsigned int num_positive_pics = get_ue_golomb_long(gb);
|
||
|
||
if ((num_positive_pics + (uint64_t)num_negative_pics) * 2 > get_bits_left(gb))
|
||
return AVERROR_INVALIDDATA;
|
||
|
||
num_delta_pocs[rps_idx] = num_negative_pics + num_positive_pics;
|
||
|
||
for (i = 0; i < num_negative_pics; i++) {
|
||
get_ue_golomb_long(gb); // delta_poc_s0_minus1[rps_idx]
|
||
skip_bits1 (gb); // used_by_curr_pic_s0_flag[rps_idx]
|
||
}
|
||
|
||
for (i = 0; i < num_positive_pics; i++) {
|
||
get_ue_golomb_long(gb); // delta_poc_s1_minus1[rps_idx]
|
||
skip_bits1 (gb); // used_by_curr_pic_s1_flag[rps_idx]
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int hvcc_parse_sps(GetBitContext *gb,
|
||
HEVCDecoderConfigurationRecord *hvcc)
|
||
{
|
||
unsigned int i, sps_max_sub_layers_minus1, log2_max_pic_order_cnt_lsb_minus4;
|
||
unsigned int num_short_term_ref_pic_sets, num_delta_pocs[MAX_SHORT_TERM_RPS_COUNT];
|
||
|
||
skip_bits(gb, 4); // sps_video_parameter_set_id
|
||
|
||
sps_max_sub_layers_minus1 = get_bits (gb, 3);
|
||
|
||
/*
|
||
* numTemporalLayers greater than 1 indicates that the stream to which this
|
||
* configuration record applies is temporally scalable and the contained
|
||
* number of temporal layers (also referred to as temporal sub-layer or
|
||
* sub-layer in ISO/IEC 23008-2) is equal to numTemporalLayers. Value 1
|
||
* indicates that the stream is not temporally scalable. Value 0 indicates
|
||
* that it is unknown whether the stream is temporally scalable.
|
||
*/
|
||
hvcc->numTemporalLayers = FFMAX(hvcc->numTemporalLayers,
|
||
sps_max_sub_layers_minus1 + 1);
|
||
|
||
hvcc->temporalIdNested = get_bits1(gb);
|
||
|
||
hvcc_parse_ptl(gb, hvcc, sps_max_sub_layers_minus1);
|
||
|
||
get_ue_golomb_long(gb); // sps_seq_parameter_set_id
|
||
|
||
hvcc->chromaFormat = get_ue_golomb_long(gb);
|
||
|
||
if (hvcc->chromaFormat == 3)
|
||
skip_bits1(gb); // separate_colour_plane_flag
|
||
|
||
get_ue_golomb_long(gb); // pic_width_in_luma_samples
|
||
get_ue_golomb_long(gb); // pic_height_in_luma_samples
|
||
|
||
if (get_bits1(gb)) { // conformance_window_flag
|
||
get_ue_golomb_long(gb); // conf_win_left_offset
|
||
get_ue_golomb_long(gb); // conf_win_right_offset
|
||
get_ue_golomb_long(gb); // conf_win_top_offset
|
||
get_ue_golomb_long(gb); // conf_win_bottom_offset
|
||
}
|
||
|
||
hvcc->bitDepthLumaMinus8 = get_ue_golomb_long(gb);
|
||
hvcc->bitDepthChromaMinus8 = get_ue_golomb_long(gb);
|
||
log2_max_pic_order_cnt_lsb_minus4 = get_ue_golomb_long(gb);
|
||
|
||
/* sps_sub_layer_ordering_info_present_flag */
|
||
i = get_bits1(gb) ? 0 : sps_max_sub_layers_minus1;
|
||
for (; i <= sps_max_sub_layers_minus1; i++)
|
||
skip_sub_layer_ordering_info(gb);
|
||
|
||
get_ue_golomb_long(gb); // log2_min_luma_coding_block_size_minus3
|
||
get_ue_golomb_long(gb); // log2_diff_max_min_luma_coding_block_size
|
||
get_ue_golomb_long(gb); // log2_min_transform_block_size_minus2
|
||
get_ue_golomb_long(gb); // log2_diff_max_min_transform_block_size
|
||
get_ue_golomb_long(gb); // max_transform_hierarchy_depth_inter
|
||
get_ue_golomb_long(gb); // max_transform_hierarchy_depth_intra
|
||
|
||
if (get_bits1(gb) && // scaling_list_enabled_flag
|
||
get_bits1(gb)) // sps_scaling_list_data_present_flag
|
||
skip_scaling_list_data(gb);
|
||
|
||
skip_bits1(gb); // amp_enabled_flag
|
||
skip_bits1(gb); // sample_adaptive_offset_enabled_flag
|
||
|
||
if (get_bits1(gb)) { // pcm_enabled_flag
|
||
skip_bits (gb, 4); // pcm_sample_bit_depth_luma_minus1
|
||
skip_bits (gb, 4); // pcm_sample_bit_depth_chroma_minus1
|
||
get_ue_golomb_long(gb); // log2_min_pcm_luma_coding_block_size_minus3
|
||
get_ue_golomb_long(gb); // log2_diff_max_min_pcm_luma_coding_block_size
|
||
skip_bits1 (gb); // pcm_loop_filter_disabled_flag
|
||
}
|
||
|
||
num_short_term_ref_pic_sets = get_ue_golomb_long(gb);
|
||
if (num_short_term_ref_pic_sets > MAX_SHORT_TERM_RPS_COUNT)
|
||
return AVERROR_INVALIDDATA;
|
||
|
||
for (i = 0; i < num_short_term_ref_pic_sets; i++) {
|
||
int ret = parse_rps(gb, i, num_short_term_ref_pic_sets, num_delta_pocs);
|
||
if (ret < 0)
|
||
return ret;
|
||
}
|
||
|
||
if (get_bits1(gb)) { // long_term_ref_pics_present_flag
|
||
unsigned num_long_term_ref_pics_sps = get_ue_golomb_long(gb);
|
||
if (num_long_term_ref_pics_sps > 31U)
|
||
return AVERROR_INVALIDDATA;
|
||
for (i = 0; i < num_long_term_ref_pics_sps; i++) { // num_long_term_ref_pics_sps
|
||
int len = FFMIN(log2_max_pic_order_cnt_lsb_minus4 + 4, 16);
|
||
skip_bits (gb, len); // lt_ref_pic_poc_lsb_sps[i]
|
||
skip_bits1(gb); // used_by_curr_pic_lt_sps_flag[i]
|
||
}
|
||
}
|
||
|
||
skip_bits1(gb); // sps_temporal_mvp_enabled_flag
|
||
skip_bits1(gb); // strong_intra_smoothing_enabled_flag
|
||
|
||
if (get_bits1(gb)) // vui_parameters_present_flag
|
||
hvcc_parse_vui(gb, hvcc, sps_max_sub_layers_minus1);
|
||
|
||
/* nothing useful for hvcC past this point */
|
||
return 0;
|
||
}
|
||
|
||
static int hvcc_parse_pps(GetBitContext *gb,
|
||
HEVCDecoderConfigurationRecord *hvcc)
|
||
{
|
||
uint8_t tiles_enabled_flag, entropy_coding_sync_enabled_flag;
|
||
|
||
get_ue_golomb_long(gb); // pps_pic_parameter_set_id
|
||
get_ue_golomb_long(gb); // pps_seq_parameter_set_id
|
||
|
||
/*
|
||
* dependent_slice_segments_enabled_flag u(1)
|
||
* output_flag_present_flag u(1)
|
||
* num_extra_slice_header_bits u(3)
|
||
* sign_data_hiding_enabled_flag u(1)
|
||
* cabac_init_present_flag u(1)
|
||
*/
|
||
skip_bits(gb, 7);
|
||
|
||
get_ue_golomb_long(gb); // num_ref_idx_l0_default_active_minus1
|
||
get_ue_golomb_long(gb); // num_ref_idx_l1_default_active_minus1
|
||
get_se_golomb_long(gb); // init_qp_minus26
|
||
|
||
/*
|
||
* constrained_intra_pred_flag u(1)
|
||
* transform_skip_enabled_flag u(1)
|
||
*/
|
||
skip_bits(gb, 2);
|
||
|
||
if (get_bits1(gb)) // cu_qp_delta_enabled_flag
|
||
get_ue_golomb_long(gb); // diff_cu_qp_delta_depth
|
||
|
||
get_se_golomb_long(gb); // pps_cb_qp_offset
|
||
get_se_golomb_long(gb); // pps_cr_qp_offset
|
||
|
||
/*
|
||
* pps_slice_chroma_qp_offsets_present_flag u(1)
|
||
* weighted_pred_flag u(1)
|
||
* weighted_bipred_flag u(1)
|
||
* transquant_bypass_enabled_flag u(1)
|
||
*/
|
||
skip_bits(gb, 4);
|
||
|
||
tiles_enabled_flag = get_bits1(gb);
|
||
entropy_coding_sync_enabled_flag = get_bits1(gb);
|
||
|
||
if (entropy_coding_sync_enabled_flag && tiles_enabled_flag)
|
||
hvcc->parallelismType = 0; // mixed-type parallel decoding
|
||
else if (entropy_coding_sync_enabled_flag)
|
||
hvcc->parallelismType = 3; // wavefront-based parallel decoding
|
||
else if (tiles_enabled_flag)
|
||
hvcc->parallelismType = 2; // tile-based parallel decoding
|
||
else
|
||
hvcc->parallelismType = 1; // slice-based parallel decoding
|
||
|
||
/* nothing useful for hvcC past this point */
|
||
return 0;
|
||
}
|
||
|
||
static uint8_t *nal_unit_extract_rbsp(const uint8_t *src, uint32_t src_len,
|
||
uint32_t *dst_len)
|
||
{
|
||
uint8_t *dst;
|
||
uint32_t i, len;
|
||
|
||
dst = av_malloc(src_len);
|
||
if (!dst)
|
||
return NULL;
|
||
|
||
/* NAL unit header (2 bytes) */
|
||
i = len = 0;
|
||
while (i < 2 && i < src_len)
|
||
dst[len++] = src[i++];
|
||
|
||
while (i + 2 < src_len)
|
||
if (!src[i] && !src[i + 1] && src[i + 2] == 3) {
|
||
dst[len++] = src[i++];
|
||
dst[len++] = src[i++];
|
||
i++; // remove emulation_prevention_three_byte
|
||
} else
|
||
dst[len++] = src[i++];
|
||
|
||
while (i < src_len)
|
||
dst[len++] = src[i++];
|
||
|
||
*dst_len = len;
|
||
return dst;
|
||
}
|
||
|
||
|
||
|
||
static void nal_unit_parse_header(GetBitContext *gb, uint8_t *nal_type)
|
||
{
|
||
skip_bits1(gb); // forbidden_zero_bit
|
||
|
||
*nal_type = get_bits(gb, 6);
|
||
|
||
/*
|
||
* nuh_layer_id u(6)
|
||
* nuh_temporal_id_plus1 u(3)
|
||
*/
|
||
skip_bits(gb, 9);
|
||
}
|
||
|
||
static int hvcc_array_add_nal_unit(uint8_t *nal_buf, uint32_t nal_size,
|
||
uint8_t nal_type, int ps_array_completeness,
|
||
HEVCDecoderConfigurationRecord *hvcc)
|
||
{
|
||
int ret;
|
||
uint8_t index;
|
||
uint16_t numNalus;
|
||
HVCCNALUnitArray *array;
|
||
|
||
for (index = 0; index < hvcc->numOfArrays; index++)
|
||
if (hvcc->array[index].NAL_unit_type == nal_type)
|
||
break;
|
||
|
||
if (index >= hvcc->numOfArrays) {
|
||
uint8_t i;
|
||
|
||
ret = av_reallocp_array(&hvcc->array, index + 1, sizeof(HVCCNALUnitArray));
|
||
if (ret < 0)
|
||
return ret;
|
||
|
||
for (i = hvcc->numOfArrays; i <= index; i++)
|
||
memset(&hvcc->array[i], 0, sizeof(HVCCNALUnitArray));
|
||
hvcc->numOfArrays = index + 1;
|
||
}
|
||
|
||
array = &hvcc->array[index];
|
||
numNalus = array->numNalus;
|
||
|
||
ret = av_reallocp_array(&array->nalUnit, numNalus + 1, sizeof(uint8_t*));
|
||
if (ret < 0)
|
||
return ret;
|
||
|
||
ret = av_reallocp_array(&array->nalUnitLength, numNalus + 1, sizeof(uint16_t));
|
||
if (ret < 0)
|
||
return ret;
|
||
|
||
array->nalUnit [numNalus] = nal_buf;
|
||
array->nalUnitLength[numNalus] = nal_size;
|
||
array->NAL_unit_type = nal_type;
|
||
array->numNalus++;
|
||
|
||
/*
|
||
* When the sample entry name is ‘hvc1’, the default and mandatory value of
|
||
* array_completeness is 1 for arrays of all types of parameter sets, and 0
|
||
* for all other arrays. When the sample entry name is ‘hev1’, the default
|
||
* value of array_completeness is 0 for all arrays.
|
||
*/
|
||
if (nal_type == NAL_VPS || nal_type == NAL_SPS || nal_type == NAL_PPS)
|
||
array->array_completeness = ps_array_completeness;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int hvcc_add_nal_unit(uint8_t *nal_buf, uint32_t nal_size,
|
||
int ps_array_completeness,
|
||
HEVCDecoderConfigurationRecord *hvcc)
|
||
{
|
||
int ret = 0;
|
||
GetBitContext gbc;
|
||
uint8_t nal_type;
|
||
uint8_t *rbsp_buf;
|
||
uint32_t rbsp_size;
|
||
|
||
rbsp_buf = nal_unit_extract_rbsp(nal_buf, nal_size, &rbsp_size);
|
||
if (!rbsp_buf) {
|
||
ret = AVERROR(ENOMEM);
|
||
goto end;
|
||
}
|
||
|
||
ret = init_get_bits8(&gbc, rbsp_buf, rbsp_size);
|
||
if (ret < 0)
|
||
goto end;
|
||
|
||
nal_unit_parse_header(&gbc, &nal_type);
|
||
|
||
/*
|
||
* Note: only 'declarative' SEI messages are allowed in
|
||
* hvcC. Perhaps the SEI playload type should be checked
|
||
* and non-declarative SEI messages discarded?
|
||
*/
|
||
switch (nal_type) {
|
||
case NAL_VPS:
|
||
case NAL_SPS:
|
||
case NAL_PPS:
|
||
case NAL_SEI_PREFIX:
|
||
case NAL_SEI_SUFFIX:
|
||
ret = hvcc_array_add_nal_unit(nal_buf, nal_size, nal_type,
|
||
ps_array_completeness, hvcc);
|
||
if (ret < 0)
|
||
goto end;
|
||
else if (nal_type == NAL_VPS)
|
||
ret = hvcc_parse_vps(&gbc, hvcc);
|
||
else if (nal_type == NAL_SPS)
|
||
ret = hvcc_parse_sps(&gbc, hvcc);
|
||
else if (nal_type == NAL_PPS)
|
||
ret = hvcc_parse_pps(&gbc, hvcc);
|
||
if (ret < 0)
|
||
goto end;
|
||
break;
|
||
default:
|
||
ret = AVERROR_INVALIDDATA;
|
||
goto end;
|
||
}
|
||
|
||
end:
|
||
av_free(rbsp_buf);
|
||
return ret;
|
||
}
|
||
|
||
static void hvcc_init(HEVCDecoderConfigurationRecord *hvcc)
|
||
{
|
||
memset(hvcc, 0, sizeof(HEVCDecoderConfigurationRecord));
|
||
hvcc->configurationVersion = 1;
|
||
hvcc->lengthSizeMinusOne = 3; // 4 bytes
|
||
|
||
/*
|
||
* The following fields have all their valid bits set by default,
|
||
* the ProfileTierLevel parsing code will unset them when needed.
|
||
*/
|
||
hvcc->general_profile_compatibility_flags = 0xffffffff;
|
||
hvcc->general_constraint_indicator_flags = 0xffffffffffff;
|
||
|
||
/*
|
||
* Initialize this field with an invalid value which can be used to detect
|
||
* whether we didn't see any VUI (in which case it should be reset to zero).
|
||
*/
|
||
hvcc->min_spatial_segmentation_idc = MAX_SPATIAL_SEGMENTATION + 1;
|
||
}
|
||
|
||
static void hvcc_close(HEVCDecoderConfigurationRecord *hvcc)
|
||
{
|
||
uint8_t i;
|
||
|
||
for (i = 0; i < hvcc->numOfArrays; i++) {
|
||
hvcc->array[i].numNalus = 0;
|
||
av_freep(&hvcc->array[i].nalUnit);
|
||
av_freep(&hvcc->array[i].nalUnitLength);
|
||
}
|
||
|
||
hvcc->numOfArrays = 0;
|
||
av_freep(&hvcc->array);
|
||
}
|
||
|
||
static int hvcc_write(AVIOContext *pb, HEVCDecoderConfigurationRecord *hvcc)
|
||
{
|
||
uint8_t i;
|
||
uint16_t j, vps_count = 0, sps_count = 0, pps_count = 0;
|
||
|
||
/*
|
||
* We only support writing HEVCDecoderConfigurationRecord version 1.
|
||
*/
|
||
hvcc->configurationVersion = 1;
|
||
|
||
/*
|
||
* If min_spatial_segmentation_idc is invalid, reset to 0 (unspecified).
|
||
*/
|
||
if (hvcc->min_spatial_segmentation_idc > MAX_SPATIAL_SEGMENTATION)
|
||
hvcc->min_spatial_segmentation_idc = 0;
|
||
|
||
/*
|
||
* parallelismType indicates the type of parallelism that is used to meet
|
||
* the restrictions imposed by min_spatial_segmentation_idc when the value
|
||
* of min_spatial_segmentation_idc is greater than 0.
|
||
*/
|
||
if (!hvcc->min_spatial_segmentation_idc)
|
||
hvcc->parallelismType = 0;
|
||
|
||
/*
|
||
* It's unclear how to properly compute these fields, so
|
||
* let's always set them to values meaning 'unspecified'.
|
||
*/
|
||
hvcc->avgFrameRate = 0;
|
||
hvcc->constantFrameRate = 0;
|
||
|
||
av_dlog(NULL, "configurationVersion: %"PRIu8"\n",
|
||
hvcc->configurationVersion);
|
||
av_dlog(NULL, "general_profile_space: %"PRIu8"\n",
|
||
hvcc->general_profile_space);
|
||
av_dlog(NULL, "general_tier_flag: %"PRIu8"\n",
|
||
hvcc->general_tier_flag);
|
||
av_dlog(NULL, "general_profile_idc: %"PRIu8"\n",
|
||
hvcc->general_profile_idc);
|
||
av_dlog(NULL, "general_profile_compatibility_flags: 0x%08"PRIx32"\n",
|
||
hvcc->general_profile_compatibility_flags);
|
||
av_dlog(NULL, "general_constraint_indicator_flags: 0x%012"PRIx64"\n",
|
||
hvcc->general_constraint_indicator_flags);
|
||
av_dlog(NULL, "general_level_idc: %"PRIu8"\n",
|
||
hvcc->general_level_idc);
|
||
av_dlog(NULL, "min_spatial_segmentation_idc: %"PRIu16"\n",
|
||
hvcc->min_spatial_segmentation_idc);
|
||
av_dlog(NULL, "parallelismType: %"PRIu8"\n",
|
||
hvcc->parallelismType);
|
||
av_dlog(NULL, "chromaFormat: %"PRIu8"\n",
|
||
hvcc->chromaFormat);
|
||
av_dlog(NULL, "bitDepthLumaMinus8: %"PRIu8"\n",
|
||
hvcc->bitDepthLumaMinus8);
|
||
av_dlog(NULL, "bitDepthChromaMinus8: %"PRIu8"\n",
|
||
hvcc->bitDepthChromaMinus8);
|
||
av_dlog(NULL, "avgFrameRate: %"PRIu16"\n",
|
||
hvcc->avgFrameRate);
|
||
av_dlog(NULL, "constantFrameRate: %"PRIu8"\n",
|
||
hvcc->constantFrameRate);
|
||
av_dlog(NULL, "numTemporalLayers: %"PRIu8"\n",
|
||
hvcc->numTemporalLayers);
|
||
av_dlog(NULL, "temporalIdNested: %"PRIu8"\n",
|
||
hvcc->temporalIdNested);
|
||
av_dlog(NULL, "lengthSizeMinusOne: %"PRIu8"\n",
|
||
hvcc->lengthSizeMinusOne);
|
||
av_dlog(NULL, "numOfArrays: %"PRIu8"\n",
|
||
hvcc->numOfArrays);
|
||
for (i = 0; i < hvcc->numOfArrays; i++) {
|
||
av_dlog(NULL, "array_completeness[%"PRIu8"]: %"PRIu8"\n",
|
||
i, hvcc->array[i].array_completeness);
|
||
av_dlog(NULL, "NAL_unit_type[%"PRIu8"]: %"PRIu8"\n",
|
||
i, hvcc->array[i].NAL_unit_type);
|
||
av_dlog(NULL, "numNalus[%"PRIu8"]: %"PRIu16"\n",
|
||
i, hvcc->array[i].numNalus);
|
||
for (j = 0; j < hvcc->array[i].numNalus; j++)
|
||
av_dlog(NULL,
|
||
"nalUnitLength[%"PRIu8"][%"PRIu16"]: %"PRIu16"\n",
|
||
i, j, hvcc->array[i].nalUnitLength[j]);
|
||
}
|
||
|
||
/*
|
||
* We need at least one of each: VPS, SPS and PPS.
|
||
*/
|
||
for (i = 0; i < hvcc->numOfArrays; i++)
|
||
switch (hvcc->array[i].NAL_unit_type) {
|
||
case NAL_VPS:
|
||
vps_count += hvcc->array[i].numNalus;
|
||
break;
|
||
case NAL_SPS:
|
||
sps_count += hvcc->array[i].numNalus;
|
||
break;
|
||
case NAL_PPS:
|
||
pps_count += hvcc->array[i].numNalus;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
if (!vps_count || vps_count > MAX_VPS_COUNT ||
|
||
!sps_count || sps_count > MAX_SPS_COUNT ||
|
||
!pps_count || pps_count > MAX_PPS_COUNT)
|
||
return AVERROR_INVALIDDATA;
|
||
|
||
/* unsigned int(8) configurationVersion = 1; */
|
||
avio_w8(pb, hvcc->configurationVersion);
|
||
|
||
/*
|
||
* unsigned int(2) general_profile_space;
|
||
* unsigned int(1) general_tier_flag;
|
||
* unsigned int(5) general_profile_idc;
|
||
*/
|
||
avio_w8(pb, hvcc->general_profile_space << 6 |
|
||
hvcc->general_tier_flag << 5 |
|
||
hvcc->general_profile_idc);
|
||
|
||
/* unsigned int(32) general_profile_compatibility_flags; */
|
||
avio_wb32(pb, hvcc->general_profile_compatibility_flags);
|
||
|
||
/* unsigned int(48) general_constraint_indicator_flags; */
|
||
avio_wb32(pb, hvcc->general_constraint_indicator_flags >> 16);
|
||
avio_wb16(pb, hvcc->general_constraint_indicator_flags);
|
||
|
||
/* unsigned int(8) general_level_idc; */
|
||
avio_w8(pb, hvcc->general_level_idc);
|
||
|
||
/*
|
||
* bit(4) reserved = ‘1111’b;
|
||
* unsigned int(12) min_spatial_segmentation_idc;
|
||
*/
|
||
avio_wb16(pb, hvcc->min_spatial_segmentation_idc | 0xf000);
|
||
|
||
/*
|
||
* bit(6) reserved = ‘111111’b;
|
||
* unsigned int(2) parallelismType;
|
||
*/
|
||
avio_w8(pb, hvcc->parallelismType | 0xfc);
|
||
|
||
/*
|
||
* bit(6) reserved = ‘111111’b;
|
||
* unsigned int(2) chromaFormat;
|
||
*/
|
||
avio_w8(pb, hvcc->chromaFormat | 0xfc);
|
||
|
||
/*
|
||
* bit(5) reserved = ‘11111’b;
|
||
* unsigned int(3) bitDepthLumaMinus8;
|
||
*/
|
||
avio_w8(pb, hvcc->bitDepthLumaMinus8 | 0xf8);
|
||
|
||
/*
|
||
* bit(5) reserved = ‘11111’b;
|
||
* unsigned int(3) bitDepthChromaMinus8;
|
||
*/
|
||
avio_w8(pb, hvcc->bitDepthChromaMinus8 | 0xf8);
|
||
|
||
/* bit(16) avgFrameRate; */
|
||
avio_wb16(pb, hvcc->avgFrameRate);
|
||
|
||
/*
|
||
* bit(2) constantFrameRate;
|
||
* bit(3) numTemporalLayers;
|
||
* bit(1) temporalIdNested;
|
||
* unsigned int(2) lengthSizeMinusOne;
|
||
*/
|
||
avio_w8(pb, hvcc->constantFrameRate << 6 |
|
||
hvcc->numTemporalLayers << 3 |
|
||
hvcc->temporalIdNested << 2 |
|
||
hvcc->lengthSizeMinusOne);
|
||
|
||
/* unsigned int(8) numOfArrays; */
|
||
avio_w8(pb, hvcc->numOfArrays);
|
||
|
||
for (i = 0; i < hvcc->numOfArrays; i++) {
|
||
/*
|
||
* bit(1) array_completeness;
|
||
* unsigned int(1) reserved = 0;
|
||
* unsigned int(6) NAL_unit_type;
|
||
*/
|
||
avio_w8(pb, hvcc->array[i].array_completeness << 7 |
|
||
hvcc->array[i].NAL_unit_type & 0x3f);
|
||
|
||
/* unsigned int(16) numNalus; */
|
||
avio_wb16(pb, hvcc->array[i].numNalus);
|
||
|
||
for (j = 0; j < hvcc->array[i].numNalus; j++) {
|
||
/* unsigned int(16) nalUnitLength; */
|
||
avio_wb16(pb, hvcc->array[i].nalUnitLength[j]);
|
||
|
||
/* bit(8*nalUnitLength) nalUnit; */
|
||
avio_write(pb, hvcc->array[i].nalUnit[j],
|
||
hvcc->array[i].nalUnitLength[j]);
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
int ff_hevc_annexb2mp4(AVIOContext *pb, const uint8_t *buf_in,
|
||
int size, int filter_ps, int *ps_count)
|
||
{
|
||
int num_ps = 0, ret = 0;
|
||
uint8_t *buf, *end, *start = NULL;
|
||
|
||
if (!filter_ps) {
|
||
ret = ff_avc_parse_nal_units(pb, buf_in, size);
|
||
goto end;
|
||
}
|
||
|
||
ret = ff_avc_parse_nal_units_buf(buf_in, &start, &size);
|
||
if (ret < 0)
|
||
goto end;
|
||
|
||
ret = 0;
|
||
buf = start;
|
||
end = start + size;
|
||
|
||
while (end - buf > 4) {
|
||
uint32_t len = FFMIN(AV_RB32(buf), end - buf - 4);
|
||
uint8_t type = (buf[4] >> 1) & 0x3f;
|
||
|
||
buf += 4;
|
||
|
||
switch (type) {
|
||
case NAL_VPS:
|
||
case NAL_SPS:
|
||
case NAL_PPS:
|
||
num_ps++;
|
||
break;
|
||
default:
|
||
ret += 4 + len;
|
||
avio_wb32(pb, len);
|
||
avio_write(pb, buf, len);
|
||
break;
|
||
}
|
||
|
||
buf += len;
|
||
}
|
||
|
||
end:
|
||
av_free(start);
|
||
if (ps_count)
|
||
*ps_count = num_ps;
|
||
return ret;
|
||
}
|
||
|
||
int ff_hevc_annexb2mp4_buf(const uint8_t *buf_in, uint8_t **buf_out,
|
||
int *size, int filter_ps, int *ps_count)
|
||
{
|
||
AVIOContext *pb;
|
||
int ret;
|
||
|
||
ret = avio_open_dyn_buf(&pb);
|
||
if (ret < 0)
|
||
return ret;
|
||
|
||
ret = ff_hevc_annexb2mp4(pb, buf_in, *size, filter_ps, ps_count);
|
||
*size = avio_close_dyn_buf(pb, buf_out);
|
||
|
||
return ret;
|
||
}
|
||
|
||
int ff_isom_write_hvcc(AVIOContext *pb, const uint8_t *data,
|
||
int size, int ps_array_completeness)
|
||
{
|
||
int ret = 0;
|
||
uint8_t *buf, *end, *start = NULL;
|
||
HEVCDecoderConfigurationRecord hvcc;
|
||
|
||
hvcc_init(&hvcc);
|
||
|
||
if (size < 6) {
|
||
/* We can't write a valid hvcC from the provided data */
|
||
ret = AVERROR_INVALIDDATA;
|
||
goto end;
|
||
} else if (*data == 1) {
|
||
/* Data is already hvcC-formatted */
|
||
avio_write(pb, data, size);
|
||
goto end;
|
||
} else if (!(AV_RB24(data) == 1 || AV_RB32(data) == 1)) {
|
||
/* Not a valid Annex B start code prefix */
|
||
ret = AVERROR_INVALIDDATA;
|
||
goto end;
|
||
}
|
||
|
||
ret = ff_avc_parse_nal_units_buf(data, &start, &size);
|
||
if (ret < 0)
|
||
goto end;
|
||
|
||
buf = start;
|
||
end = start + size;
|
||
|
||
while (end - buf > 4) {
|
||
uint32_t len = FFMIN(AV_RB32(buf), end - buf - 4);
|
||
uint8_t type = (buf[4] >> 1) & 0x3f;
|
||
|
||
buf += 4;
|
||
|
||
switch (type) {
|
||
case NAL_VPS:
|
||
case NAL_SPS:
|
||
case NAL_PPS:
|
||
case NAL_SEI_PREFIX:
|
||
case NAL_SEI_SUFFIX:
|
||
ret = hvcc_add_nal_unit(buf, len, ps_array_completeness, &hvcc);
|
||
if (ret < 0)
|
||
goto end;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
buf += len;
|
||
}
|
||
|
||
ret = hvcc_write(pb, &hvcc);
|
||
|
||
end:
|
||
hvcc_close(&hvcc);
|
||
av_free(start);
|
||
return ret;
|
||
}
|