[FFmpeg-devel] [PATCH v3 05/10] avformat: add demuxer and probe support for H266/VVC
mypopy at gmail.com
mypopy at gmail.com
Mon Nov 7 04:28:04 EET 2022
On Thu, Nov 3, 2022 at 8:23 PM Thomas Siedel <thomas.ff at spin-digital.com> wrote:
>
> Add demuxer to probe raw vvc and parse vvcc byte stream format.
>
> Signed-off-by: Thomas Siedel <thomas.ff at spin-digital.com>
> ---
> libavformat/Makefile | 1 +
> libavformat/allformats.c | 1 +
> libavformat/demux.c | 7 +-
> libavformat/vvc.c | 919 +++++++++++++++++++++++++++++++++++++++
> libavformat/vvc.h | 99 +++++
> libavformat/vvcdec.c | 61 +++
> 6 files changed, 1086 insertions(+), 2 deletions(-)
> create mode 100644 libavformat/vvc.c
> create mode 100644 libavformat/vvc.h
> create mode 100644 libavformat/vvcdec.c
>
> diff --git a/libavformat/Makefile b/libavformat/Makefile
> index d7f198bf39..00ab4ded89 100644
> --- a/libavformat/Makefile
> +++ b/libavformat/Makefile
> @@ -595,6 +595,7 @@ OBJS-$(CONFIG_VOC_MUXER) += vocenc.o voc.o
> OBJS-$(CONFIG_VPK_DEMUXER) += vpk.o
> OBJS-$(CONFIG_VPLAYER_DEMUXER) += vplayerdec.o subtitles.o
> OBJS-$(CONFIG_VQF_DEMUXER) += vqf.o
> +OBJS-$(CONFIG_VVC_DEMUXER) += vvcdec.o rawdec.o
> OBJS-$(CONFIG_W64_DEMUXER) += wavdec.o w64.o pcm.o
> OBJS-$(CONFIG_W64_MUXER) += wavenc.o w64.o
> OBJS-$(CONFIG_WAV_DEMUXER) += wavdec.o pcm.o
> diff --git a/libavformat/allformats.c b/libavformat/allformats.c
> index 47c419a009..a4e3822681 100644
> --- a/libavformat/allformats.c
> +++ b/libavformat/allformats.c
> @@ -474,6 +474,7 @@ extern const AVOutputFormat ff_voc_muxer;
> extern const AVInputFormat ff_vpk_demuxer;
> extern const AVInputFormat ff_vplayer_demuxer;
> extern const AVInputFormat ff_vqf_demuxer;
> +extern const AVInputFormat ff_vvc_demuxer;
> extern const AVInputFormat ff_w64_demuxer;
> extern const AVOutputFormat ff_w64_muxer;
> extern const AVInputFormat ff_wav_demuxer;
> diff --git a/libavformat/demux.c b/libavformat/demux.c
> index 2dfd82a63c..8dbde23fcd 100644
> --- a/libavformat/demux.c
> +++ b/libavformat/demux.c
> @@ -120,6 +120,7 @@ static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st,
> { "mp3", AV_CODEC_ID_MP3, AVMEDIA_TYPE_AUDIO },
> { "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
> { "truehd", AV_CODEC_ID_TRUEHD, AVMEDIA_TYPE_AUDIO },
> + { "vvc", AV_CODEC_ID_VVC, AVMEDIA_TYPE_VIDEO },
> { 0 }
> };
> int score;
> @@ -743,7 +744,8 @@ static int64_t select_from_pts_buffer(AVStream *st, int64_t *pts_buffer, int64_t
> {
> FFStream *const sti = ffstream(st);
> int onein_oneout = st->codecpar->codec_id != AV_CODEC_ID_H264 &&
> - st->codecpar->codec_id != AV_CODEC_ID_HEVC;
> + st->codecpar->codec_id != AV_CODEC_ID_HEVC &&
> + st->codecpar->codec_id != AV_CODEC_ID_VVC;
>
> if (!onein_oneout) {
> int delay = sti->avctx->has_b_frames;
> @@ -933,7 +935,8 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
> int64_t offset;
> AVRational duration;
> int onein_oneout = st->codecpar->codec_id != AV_CODEC_ID_H264 &&
> - st->codecpar->codec_id != AV_CODEC_ID_HEVC;
> + st->codecpar->codec_id != AV_CODEC_ID_HEVC &&
> + st->codecpar->codec_id != AV_CODEC_ID_VVC;
>
> if (s->flags & AVFMT_FLAG_NOFILLIN)
> return;
> diff --git a/libavformat/vvc.c b/libavformat/vvc.c
> new file mode 100644
> index 0000000000..b27a522009
> --- /dev/null
> +++ b/libavformat/vvc.c
> @@ -0,0 +1,919 @@
> +/*
> + * VVC helper functions for muxers
> + *
> + * Copyright (C) 2022, Thomas Siedel
> + *
> + * This file is part of FFmpeg.
> + *
> + * FFmpeg is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU Lesser General Public
> + * License as published by the Free Software Foundation; either
> + * version 2.1 of the License, or (at your option) any later version.
> + *
> + * FFmpeg is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * Lesser General Public License for more details.
> + *
> + * You should have received a copy of the GNU Lesser General Public
> + * License along with FFmpeg; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
> + */
> +
> +#include "libavcodec/get_bits.h"
> +#include "libavcodec/golomb.h"
> +#include "libavcodec/vvc.h"
> +#include "libavutil/intreadwrite.h"
> +#include "avc.h"
> +#include "avio.h"
> +#include "avio_internal.h"
> +#include "vvc.h"
> +
> +typedef struct VVCCNALUnitArray {
> + uint8_t array_completeness;
> + uint8_t NAL_unit_type;
> + uint16_t num_nalus;
> + uint16_t *nal_unit_length;
> + uint8_t **nal_unit;
> +} VVCCNALUnitArray;
> +
> +typedef struct VVCPTLRecord {
> + uint8_t num_bytes_constraint_info;
> + uint8_t general_profile_idc;
> + uint8_t general_tier_flag;
> + uint8_t general_level_idc;
> + uint8_t ptl_frame_only_constraint_flag;
> + uint8_t ptl_multilayer_enabled_flag;
> + uint8_t general_constraint_info[9];
> + uint8_t *ptl_sublayer_level_present_flag;
> + uint8_t *sublayer_level_idc;
> + uint8_t ptl_num_sub_profiles;
> + uint32_t *general_sub_profile_idc;
> +} VVCPTLRecord;
> +
> +typedef struct VVCDecoderConfigurationRecord {
> + uint8_t lengthSizeMinusOne;
> + uint8_t ptl_present_flag;
> + uint16_t ols_idx;
> + uint8_t num_sublayers;
> + uint8_t constant_frame_rate;
> + uint8_t chroma_format_idc;
> + uint8_t bit_depth_minus8;
> + VVCPTLRecord ptl;
> + uint16_t max_picture_width;
> + uint16_t max_picture_height;
> + uint16_t avg_frame_rate;
> + uint8_t num_of_arrays;
> + VVCCNALUnitArray *array;
> +} VVCDecoderConfigurationRecord;
> +
> +typedef struct VVCCProfileTierLevel {
> + uint8_t profile_idc;
> + uint8_t tier_flag;
> + uint8_t general_level_idc;
> + uint8_t ptl_frame_only_constraint_flag;
> + uint8_t ptl_multilayer_enabled_flag;
> +// general_constraint_info
> + uint8_t gci_present_flag;
> + uint8_t gci_general_constraints[9];
> + uint8_t gci_num_reserved_bits;
> +// end general_constraint_info
> + uint8_t *ptl_sublayer_level_present_flag;
> + uint8_t *sublayer_level_idc;
> + uint8_t ptl_num_sub_profiles;
> + uint32_t *general_sub_profile_idc;
> +} VVCCProfileTierLevel;
> +
> +
> +static void vvcc_update_ptl(VVCDecoderConfigurationRecord *vvcc,
> + VVCCProfileTierLevel *ptl)
> +{
> + /*
> + * The level indication general_level_idc must indicate a level of
> + * capability equal to or greater than the highest level indicated for the
> + * highest tier in all the parameter sets.
> + */
> + if (vvcc->ptl.general_tier_flag < ptl->tier_flag)
> + vvcc->ptl.general_level_idc = ptl->general_level_idc;
> + else
> + vvcc->ptl.general_level_idc = FFMAX(vvcc->ptl.general_level_idc, ptl->general_level_idc);
> +
> + /*
> + * The tier indication general_tier_flag must indicate a tier equal to or
> + * greater than the highest tier indicated in all the parameter sets.
> + */
> + vvcc->ptl.general_tier_flag = FFMAX(vvcc->ptl.general_tier_flag, ptl->tier_flag);
> +
> + /*
> + * The profile indication general_profile_idc must indicate a profile to
> + * which the stream associated with this configuration record conforms.
> + *
> + * If the sequence parameter sets are marked with different profiles, then
> + * the stream may need examination to determine which profile, if any, the
> + * entire stream conforms to. If the entire stream is not examined, or the
> + * examination reveals that there is no profile to which the entire stream
> + * conforms, then the entire stream must be split into two or more
> + * sub-streams with separate configuration records in which these rules can
> + * be met.
> + *
> + * Note: set the profile to the highest value for the sake of simplicity.
> + */
> + vvcc->ptl.general_profile_idc = FFMAX(vvcc->ptl.general_profile_idc, ptl->profile_idc);
> +
> + /*
> + * Each bit in flags may only be set if all
> + * the parameter sets set that bit.
> + */
> + vvcc->ptl.ptl_frame_only_constraint_flag &= ptl->ptl_frame_only_constraint_flag;
> + vvcc->ptl.ptl_multilayer_enabled_flag &= ptl->ptl_multilayer_enabled_flag;
> +
> + /*
> + * Constraints Info
> + */
> + if(ptl->gci_present_flag) {
> + vvcc->ptl.num_bytes_constraint_info = 9;
> + memcpy(&vvcc->ptl.general_constraint_info[0], &ptl->gci_general_constraints[0], sizeof(uint8_t)*9);
> +
> + } else {
> + vvcc->ptl.num_bytes_constraint_info = 1;
> + memset(&vvcc->ptl.general_constraint_info[0], 0, sizeof(uint8_t)*9);
> + }
> +
> + /*
> + * Each bit in flags may only be set if one of
> + * the parameter sets set that bit.
> + */
> + vvcc->ptl.ptl_sublayer_level_present_flag = (uint8_t *) malloc(sizeof(uint8_t)*vvcc->num_sublayers-1);
> + vvcc->ptl.sublayer_level_idc = (uint8_t *) malloc(sizeof(uint8_t)*vvcc->num_sublayers-1);
> +
> + memset(vvcc->ptl.ptl_sublayer_level_present_flag, 0, sizeof(uint8_t)*vvcc->num_sublayers-1);
> + memset(vvcc->ptl.sublayer_level_idc, 0, sizeof(uint8_t)*vvcc->num_sublayers-1);
> +
> + for(int i = vvcc->num_sublayers - 2; i >= 0; i--)
> + {
> + vvcc->ptl.ptl_sublayer_level_present_flag[i] |= ptl->ptl_sublayer_level_present_flag[i];
> + if(vvcc->ptl.ptl_sublayer_level_present_flag[i]){
> + vvcc->ptl.sublayer_level_idc[i] = FFMAX(vvcc->ptl.sublayer_level_idc[i], ptl->sublayer_level_idc[i]);
> + }
> + else{
> + if(i == vvcc->num_sublayers - 1){
> + vvcc->ptl.sublayer_level_idc[i] = vvcc->ptl.general_level_idc;
> + }else{
> + vvcc->ptl.sublayer_level_idc[i] = vvcc->ptl.sublayer_level_idc[i+1];
> + }
> + }
> + }
> +
> + vvcc->ptl.ptl_num_sub_profiles = FFMAX(vvcc->ptl.ptl_num_sub_profiles, ptl->ptl_num_sub_profiles);
> + if( vvcc->ptl.ptl_num_sub_profiles ){
> + vvcc->ptl.general_sub_profile_idc = (uint32_t *) malloc(sizeof(uint32_t)*vvcc->ptl.ptl_num_sub_profiles);
> + for(int i = 0; i < vvcc->ptl.ptl_num_sub_profiles; i++) {
> + vvcc->ptl.general_sub_profile_idc[i] = ptl->general_sub_profile_idc[i];
> + }
> + }
> + else
> + {
> + vvcc->ptl.general_sub_profile_idc = (uint32_t *) malloc(sizeof(uint32_t));
> + }
> +}
> +
> +static void vvcc_parse_ptl(GetBitContext *gb,
> + VVCDecoderConfigurationRecord *vvcc,
> + unsigned int profileTierPresentFlag,
> + unsigned int max_sub_layers_minus1)
> +{
> + VVCCProfileTierLevel general_ptl;
> + int j;
> +
> + if(profileTierPresentFlag) {
> + general_ptl.profile_idc = get_bits(gb, 7);
> + general_ptl.tier_flag = get_bits1(gb);
> + }
> + general_ptl.general_level_idc = get_bits(gb, 8);
> +
> + general_ptl.ptl_frame_only_constraint_flag = get_bits1(gb);
> + general_ptl.ptl_multilayer_enabled_flag = get_bits1(gb);
> + if(profileTierPresentFlag) { // parse constraint info
> + general_ptl.gci_present_flag = get_bits1(gb);
> + if(general_ptl.gci_present_flag) {
> + for (j = 0; j < 8; j++)
> + general_ptl.gci_general_constraints[j] = get_bits(gb, 8);
> + general_ptl.gci_general_constraints[8] = 0;
> + general_ptl.gci_general_constraints[8] = get_bits(gb, 7);
> +
> + general_ptl.gci_num_reserved_bits = get_bits(gb, 8);
> + skip_bits(gb, general_ptl.gci_num_reserved_bits);
> + }
> + while(gb->index % 8 != 0)
> + skip_bits1(gb);
> + }
> +
> + general_ptl.ptl_sublayer_level_present_flag = (uint8_t *) malloc(sizeof(uint8_t)*max_sub_layers_minus1);
> + for(int i = max_sub_layers_minus1-1; i >= 0; i--) {
> + general_ptl.ptl_sublayer_level_present_flag[i] = get_bits1(gb);
> + }
> + while(gb->index%8 != 0)
> + skip_bits1(gb);
> +
> + general_ptl.sublayer_level_idc = (uint8_t *) malloc(sizeof(uint8_t)*max_sub_layers_minus1);
> + for(int i = max_sub_layers_minus1-1; i >= 0; i--) {
> + if( general_ptl.ptl_sublayer_level_present_flag[i] )
> + general_ptl.sublayer_level_idc[i] = get_bits(gb, 8);
> + }
> +
> + if(profileTierPresentFlag) {
> + general_ptl.ptl_num_sub_profiles = get_bits(gb, 8);
> + if( general_ptl.ptl_num_sub_profiles) {
> + general_ptl.general_sub_profile_idc = (uint32_t *) malloc(sizeof(uint32_t)*general_ptl.ptl_num_sub_profiles);
> + for(int i = 0; i < general_ptl.ptl_num_sub_profiles; i++) {
> + general_ptl.general_sub_profile_idc[i] = get_bits_long(gb, 32);
> + }
> + }
> + else
> + {
> + general_ptl.general_sub_profile_idc = (uint32_t *) malloc(sizeof(uint32_t));
> + }
> + }
> +
> + vvcc_update_ptl(vvcc, &general_ptl);
> +
> + free(general_ptl.ptl_sublayer_level_present_flag);
> + free(general_ptl.sublayer_level_idc);
> + free(general_ptl.general_sub_profile_idc);
> +}
> +
> +static int vvcc_parse_vps(GetBitContext *gb,
> + VVCDecoderConfigurationRecord *vvcc)
> +{
> + unsigned int vps_max_layers_minus1;
> + unsigned int vps_max_sub_layers_minus1;
> + unsigned int vps_default_ptl_dpb_hrd_max_tid_flag;
> + unsigned int vps_all_independant_layer_flag;
> + unsigned int vps_each_layer_is_an_ols_flag;
> + unsigned int vps_ols_mode_idc;
> +
in FFmpeg， the indent size is 4
> + unsigned int *vps_pt_present_flag;
> + unsigned int *vps_ptl_max_tid;
> + unsigned int vps_num_ptls_minus1 = 0;
> +
> +
> + /*
> + * vps_video_parameter_set_id u(4)
> + */
> + skip_bits(gb, 4);
> +
> + vps_max_layers_minus1 = get_bits(gb, 6);
> + vps_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.
> + */
> + vvcc->num_sublayers = FFMAX(vvcc->num_sublayers,
> + vps_max_sub_layers_minus1 + 1);
> +
> +
> + if(vps_max_layers_minus1 > 0 && vps_max_sub_layers_minus1 > 0)
> + vps_default_ptl_dpb_hrd_max_tid_flag = get_bits1(gb); //vps_default_ptl_dpb_hrd_max_tid_flags
> + if(vps_max_layers_minus1 > 0)
> + vps_all_independant_layer_flag = get_bits1(gb);
> +
> + for(int i =0; i <= vps_max_layers_minus1; i++) {
> + skip_bits(gb, 6); //vps_default_ptl_dpb_hrd_max_tid_flagsvps_layer_id[i]
> + if(i > 0 && !vps_all_independant_layer_flag) {
> + if(get_bits1(gb)) { // vps_independant_layer_flag
> + unsigned int vps_max_tid_ref_present_flag = get_bits1(gb);
> + for (int j =0; j<i; j++) {
> + if(vps_max_tid_ref_present_flag && get_bits1(gb)) // vps_direct_ref_layer_flag[i][j]
> + skip_bits(gb, 3); //vps_max_tid_il_ref_pics_plus1
> + }
> + }
> + }
> + }
> +
> + if(vps_max_layers_minus1 > 0) {
> + if(vps_all_independant_layer_flag)
> + vps_each_layer_is_an_ols_flag = get_bits1(gb);
> + if(vps_each_layer_is_an_ols_flag) {
> + if(!vps_all_independant_layer_flag)
> + vps_ols_mode_idc = get_bits(gb, 2);
> + if(vps_ols_mode_idc == 2) {
> + unsigned int vps_num_output_layer_sets_minus2 = get_bits(gb, 8);
> + for( int i = 1; i <= vps_num_output_layer_sets_minus2 +1; i++) {
> + for( int j = 0; j <= vps_max_layers_minus1; j++) {
> + skip_bits1(gb);
> + }
> + }
> + }
> + }
> + vps_num_ptls_minus1 = get_bits(gb, 8);
> + }
> +
> + vps_pt_present_flag = (unsigned int *) malloc(sizeof(unsigned int) * (vps_num_ptls_minus1+1));
> + vps_ptl_max_tid = (unsigned int *) malloc(sizeof(unsigned int) * (vps_num_ptls_minus1+1));
> + for(int i = 0; i <= vps_num_ptls_minus1; i++) {
> + if(i>0)
> + vps_pt_present_flag[i] = get_bits1(gb);
> + if(!vps_default_ptl_dpb_hrd_max_tid_flag)
> + vps_ptl_max_tid[i] = get_bits(gb, 3);
> + }
> +
> + while(gb->index%8 != 0)
> + skip_bits1(gb);
> +
> + for(int i = 0; i <= vps_num_ptls_minus1; i++) {
> + vvcc_parse_ptl(gb, vvcc, vps_pt_present_flag[i], vps_ptl_max_tid[i]);
> + }
> +
> + free(vps_pt_present_flag);
> + free(vps_ptl_max_tid);
> +
> + /* nothing useful for vvcc past this point */
> + return 0;
> +}
> +
> +static int vvcc_parse_sps(GetBitContext *gb,
> + VVCDecoderConfigurationRecord *vvcc)
> +{
> + unsigned int sps_max_sub_layers_minus1, log2_ctu_size_minus5;
> + //unsigned int num_short_term_ref_pic_sets, num_delta_pocs[VVC_MAX_REF_PIC_LISTS];
> + //unsigned int sps_chroma_format_idc;
> + unsigned int sps_subpic_same_size_flag, sps_pic_height_max_in_luma_sample, sps_pic_width_max_in_luma_sample;
> + unsigned int sps_independant_subpics_flag;
> + unsigned int flag;
> +
> + skip_bits(gb, 8); // sps_seq_parameter_set_id && 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.
> + */
> + vvcc->num_sublayers = FFMAX(vvcc->num_sublayers,
> + sps_max_sub_layers_minus1 + 1);
> +
> + vvcc->chroma_format_idc = get_bits(gb, 2);
> + log2_ctu_size_minus5 = get_bits(gb, 2);
> +
> + if(get_bits1(gb)) //sps_ptl_dpb_hrd_params_present_flag
> + vvcc_parse_ptl(gb, vvcc, 1, sps_max_sub_layers_minus1);
> +
> + flag = get_bits(gb, 1); //skip_bits1(gb); //sps_gdr_enabled_flag
> + flag = get_bits(gb, 1); //sps_ref_pic_resampling_enabled_flag
> + if(flag){ //sps_ref_pic_resampling_enabled_flag
> + flag = get_bits(gb, 1); //skip_bits1(gb); //sps_res_change_in_clvs_allowed_flag
> + }
> +
> + sps_pic_width_max_in_luma_sample = get_ue_golomb_long(gb);
> + vvcc->max_picture_width = FFMAX(vvcc->max_picture_width , sps_pic_width_max_in_luma_sample);
> + sps_pic_height_max_in_luma_sample= get_ue_golomb_long(gb);
> + vvcc->max_picture_height = FFMAX(vvcc->max_picture_height , sps_pic_height_max_in_luma_sample);
> +
> + if(get_bits1(gb)) {
> + get_ue_golomb_long(gb); // sps_conf_win_left_offset
> + get_ue_golomb_long(gb); // sps_conf_win_right_offset
> + get_ue_golomb_long(gb); // sps_conf_win_top_offset
> + get_ue_golomb_long(gb); // sps_conf_win_bottom_offset
> + }
> +
> + if(get_bits1(gb)) { // sps_subpic_info_present_flag
> + unsigned int sps_num_subpics_minus1 = get_ue_golomb_long(gb);
> + if(sps_num_subpics_minus1 > 0) { // sps_num_subpics_minus1
> + sps_independant_subpics_flag = get_bits1(gb);
> + sps_subpic_same_size_flag = get_bits1(gb);
> + }
> + for(int i = 0; sps_num_subpics_minus1 > 0 && i <= sps_num_subpics_minus1; i++) {
> + if(!sps_subpic_same_size_flag || i == 0) {
> + int len = FFMIN(log2_ctu_size_minus5 +5, 16);
> + if(i > 0 && sps_pic_width_max_in_luma_sample > 128)
> + skip_bits(gb, len);
> + if(i > 0 && sps_pic_height_max_in_luma_sample > 128)
> + skip_bits(gb, len);
> + if(i < sps_num_subpics_minus1 && sps_pic_width_max_in_luma_sample > 128)
> + skip_bits(gb, len);
> + if(i < sps_num_subpics_minus1 && sps_pic_height_max_in_luma_sample > 128)
> + skip_bits(gb, len);
> + }
> + if(!sps_independant_subpics_flag) {
> + skip_bits(gb, 2); // sps_subpic_treated_as_pic_flag && sps_loop_filter_across_subpic_enabled_flag
> + }
> + }
> + get_ue_golomb_long(gb); // sps_subpic_id_len_minus1
> + if(get_bits1(gb)) { // sps_subpic_id_mapping_explicitly_signalled_flag
> + if(get_bits1(gb)) // sps_subpic_id_mapping_present_flag
> + for(int i = 0; i <= sps_num_subpics_minus1; i++) {
> + skip_bits1(gb); // sps_subpic_id[i]
> + }
> + }
> + }
> + vvcc->bit_depth_minus8 = get_ue_golomb_long(gb);
> +
> + /* nothing useful for vvcc past this point */
> + return 0;
> +}
> +
> +static int vvcc_parse_pps(GetBitContext *gb,
> + VVCDecoderConfigurationRecord *vvcc)
> +{
> +
> + // Nothing of importance to parse in PPS
> + /* nothing useful for vvcc past this point */
> + return 0;
> +}
> +
> +static void nal_unit_parse_header(GetBitContext *gb, uint8_t *nal_type)
> +{
> + /*
> + * forbidden_zero_bit u(1)
> + * nuh_reserved_zero_bit u(1)
> + * nuh_layer_id u(6)
> + */
> + skip_bits(gb, 8);
> + *nal_type = get_bits(gb, 5);
> +
> + /*
> + * nuh_temporal_id_plus1 u(3)
> + */
> + skip_bits(gb, 3);
> +}
> +
> +static int vvcc_array_add_nal_unit(uint8_t *nal_buf, uint32_t nal_size,
> + uint8_t nal_type, int ps_array_completeness,
> + VVCDecoderConfigurationRecord *vvcc)
> +{
> + int ret;
> + uint8_t index;
> + uint16_t num_nalus;
> + VVCCNALUnitArray *array;
> +
> + for (index = 0; index < vvcc->num_of_arrays; index++)
> + if (vvcc->array[index].NAL_unit_type == nal_type)
> + break;
> +
> + if (index >= vvcc->num_of_arrays) {
> + uint8_t i;
> +
> + ret = av_reallocp_array(&vvcc->array, index + 1, sizeof(VVCCNALUnitArray));
> + if (ret < 0)
> + return ret;
> +
> + for (i = vvcc->num_of_arrays; i <= index; i++)
> + memset(&vvcc->array[i], 0, sizeof(VVCCNALUnitArray));
> + vvcc->num_of_arrays = index + 1;
> + }
> +
> + array = &vvcc->array[index];
> + num_nalus = array->num_nalus;
> +
> + ret = av_reallocp_array(&array->nal_unit, num_nalus + 1, sizeof(uint8_t*));
> + if (ret < 0)
> + return ret;
> +
> + ret = av_reallocp_array(&array->nal_unit_length, num_nalus + 1, sizeof(uint16_t));
> + if (ret < 0)
> + return ret;
> +
> + array->nal_unit [num_nalus] = nal_buf;
> + array->nal_unit_length[num_nalus] = nal_size;
> + array->NAL_unit_type = nal_type;
> + array->num_nalus++;
> +
> + /*
> + * When the sample entry name is ‘vvc1’, 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 == VVC_VPS_NUT || nal_type == VVC_SPS_NUT || nal_type == VVC_PPS_NUT)
> + array->array_completeness = ps_array_completeness;
> +
> + return 0;
> +}
> +
> +static int vvcc_add_nal_unit(uint8_t *nal_buf, uint32_t nal_size,
> + int ps_array_completeness,
> + VVCDecoderConfigurationRecord *vvcc)
> +{
> + int ret = 0;
> + GetBitContext gbc;
> + uint8_t nal_type;
> + uint8_t *rbsp_buf;
> + uint32_t rbsp_size;
> +
> + rbsp_buf = ff_nal_unit_extract_rbsp(nal_buf, nal_size, &rbsp_size, 2);
> + 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
> + * vvcc. Perhaps the SEI playload type should be checked
> + * and non-declarative SEI messages discarded?
> + */
> + switch (nal_type) {
> + case VVC_OPI_NUT:
> + case VVC_VPS_NUT:
> + case VVC_SPS_NUT:
> + case VVC_PPS_NUT:
> + case VVC_PREFIX_SEI_NUT:
> + case VVC_SUFFIX_SEI_NUT:
> + ret = vvcc_array_add_nal_unit(nal_buf, nal_size, nal_type,
> + ps_array_completeness, vvcc);
> + if (ret < 0)
> + goto end;
> + else if (nal_type == VVC_VPS_NUT)
> + ret = vvcc_parse_vps(&gbc, vvcc);
> + else if (nal_type == VVC_SPS_NUT)
> + ret = vvcc_parse_sps(&gbc, vvcc);
> + else if (nal_type == VVC_PPS_NUT)
> + ret = vvcc_parse_pps(&gbc, vvcc);
> + else if (nal_type == VVC_OPI_NUT) {
> + // not yet supported
> + }
> + if (ret < 0)
> + goto end;
> + break;
> + default:
> + ret = AVERROR_INVALIDDATA;
> + goto end;
> + }
> +
> +end:
> + av_free(rbsp_buf);
> + return ret;
> +}
> +
> +static void vvcc_init(VVCDecoderConfigurationRecord *vvcc)
> +{
> + memset(vvcc, 0, sizeof(VVCDecoderConfigurationRecord));
> + vvcc->lengthSizeMinusOne = 3; // 4 bytes
> +
> + vvcc->ptl.num_bytes_constraint_info = 1;
> +
> + vvcc->ptl_present_flag = 1;
> +}
> +
> +static void vvcc_close(VVCDecoderConfigurationRecord *vvcc)
> +{
> + uint8_t i;
> +
> + for (i = 0; i < vvcc->num_of_arrays; i++) {
> + vvcc->array[i].num_nalus = 0;
> + av_freep(&vvcc->array[i].nal_unit);
> + av_freep(&vvcc->array[i].nal_unit_length);
> + }
> +
> + free(vvcc->ptl.ptl_sublayer_level_present_flag);
> + free(vvcc->ptl.sublayer_level_idc);
> + free(vvcc->ptl.general_sub_profile_idc);
> +
> + vvcc->num_of_arrays = 0;
> + av_freep(&vvcc->array);
> +}
> +
> +static int vvcc_write(AVIOContext *pb, VVCDecoderConfigurationRecord *vvcc)
> +{
> + uint8_t i;
> + uint16_t j, vps_count = 0, sps_count = 0, pps_count = 0;
> + unsigned char *buf = NULL;
> + /*
> + * It's unclear how to properly compute these fields, so
> + * let's always set them to values meaning 'unspecified'.
> + */
> + vvcc->avg_frame_rate = 0;
> + vvcc->constant_frame_rate = 1;
> +
> + av_log(NULL, AV_LOG_TRACE, "lengthSizeMinusOne: %"PRIu8"\n",
> + vvcc->lengthSizeMinusOne);
> + av_log(NULL, AV_LOG_TRACE, "ptl_present_flag: %"PRIu8"\n",
> + vvcc->ptl_present_flag);
> + av_log(NULL, AV_LOG_TRACE, "ols_idx: %"PRIu16"\n",
> + vvcc->ols_idx);
> + av_log(NULL, AV_LOG_TRACE, "num_sublayers: %"PRIu8"\n",
> + vvcc->num_sublayers);
> + av_log(NULL, AV_LOG_TRACE, "constant_frame_rate: %"PRIu8"\n",
> + vvcc->constant_frame_rate);
> + av_log(NULL, AV_LOG_TRACE, "chroma_format_idc: %"PRIu8"\n",
> + vvcc->chroma_format_idc);
> +
> + av_log(NULL, AV_LOG_TRACE, "bit_depth_minus8: %"PRIu8"\n",
> + vvcc->bit_depth_minus8);
> + av_log(NULL, AV_LOG_TRACE, "num_bytes_constraint_info: %"PRIu8"\n",
> + vvcc->ptl.num_bytes_constraint_info);
> + av_log(NULL, AV_LOG_TRACE, "general_profile_idc: %"PRIu8"\n",
> + vvcc->ptl.general_profile_idc);
> + av_log(NULL, AV_LOG_TRACE, "general_tier_flag: %"PRIu8"\n",
> + vvcc->ptl.general_tier_flag);
> + av_log(NULL, AV_LOG_TRACE, "general_level_idc: %"PRIu8"\n",
> + vvcc->ptl.general_level_idc);
> + av_log(NULL, AV_LOG_TRACE, "ptl_frame_only_constraint_flag: %"PRIu8"\n",
> + vvcc->ptl.ptl_frame_only_constraint_flag);
> + av_log(NULL, AV_LOG_TRACE, "ptl_multilayer_enabled_flag: %"PRIu8"\n",
> + vvcc->ptl.ptl_multilayer_enabled_flag);
> + for (i = 0; i < vvcc->ptl.num_bytes_constraint_info; i++) {
> + av_log(NULL, AV_LOG_TRACE, "general_constraint_info[%d]: %"PRIu8"\n",
> + i, vvcc->ptl.general_constraint_info[i]);
> + }
> +
> + for (i = 0; i < vvcc->num_sublayers-1; i++) {
> + av_log(NULL, AV_LOG_TRACE, "ptl_sublayer_level_present_flag[%"PRIu8"]: %"PRIu8"\n",
> + i, vvcc->ptl.ptl_sublayer_level_present_flag[i]);
> + av_log(NULL, AV_LOG_TRACE, "sublayer_level_idc[%"PRIu8"]: %"PRIu8"\n",
> + i, vvcc->ptl.sublayer_level_idc[i]);
> + }
> +
> + av_log(NULL, AV_LOG_TRACE, "num_sub_profiles: %"PRIu8"\n",
> + vvcc->ptl.ptl_num_sub_profiles);
> +
> + for (i = 0; i < vvcc->ptl.ptl_num_sub_profiles; i++) {
> + av_log(NULL, AV_LOG_TRACE, "general_sub_profile_idc[%"PRIu8"]: %"PRIx32"\n",
> + i, vvcc->ptl.general_sub_profile_idc[i]);
> + }
> +
> + av_log(NULL, AV_LOG_TRACE, "max_picture_width: %"PRIu16"\n",
> + vvcc->max_picture_width);
> + av_log(NULL, AV_LOG_TRACE, "max_picture_height: %"PRIu16"\n",
> + vvcc->max_picture_height);
> + av_log(NULL, AV_LOG_TRACE, "avg_frame_rate: %"PRIu16"\n",
> + vvcc->avg_frame_rate);
> +
> + av_log(NULL, AV_LOG_TRACE, "num_of_arrays: %"PRIu8"\n",
> + vvcc->num_of_arrays);
> + for (i = 0; i < vvcc->num_of_arrays; i++) {
> + av_log(NULL, AV_LOG_TRACE, "array_completeness[%"PRIu8"]: %"PRIu8"\n",
> + i, vvcc->array[i].array_completeness);
> + av_log(NULL, AV_LOG_TRACE, "NAL_unit_type[%"PRIu8"]: %"PRIu8"\n",
> + i, vvcc->array[i].NAL_unit_type);
> + av_log(NULL, AV_LOG_TRACE, "num_nalus[%"PRIu8"]: %"PRIu16"\n",
> + i, vvcc->array[i].num_nalus);
> + for (j = 0; j < vvcc->array[i].num_nalus; j++)
> + av_log(NULL, AV_LOG_TRACE,
> + "nal_unit_length[%"PRIu8"][%"PRIu16"]: %"PRIu16"\n",
> + i, j, vvcc->array[i].nal_unit_length[j]);
> + }
> +
> + /*
> + * We need at least one of each: VPS and SPS.
> + */
> + for (i = 0; i < vvcc->num_of_arrays; i++)
> + switch (vvcc->array[i].NAL_unit_type) {
> + case VVC_VPS_NUT:
> + vps_count += vvcc->array[i].num_nalus;
> + break;
> + case VVC_SPS_NUT:
> + sps_count += vvcc->array[i].num_nalus;
> + break;
> + case VVC_PPS_NUT:
> + pps_count += vvcc->array[i].num_nalus;
> + break;
> + default:
> + break;
> + }
> +
> + if (!sps_count || sps_count > VVC_MAX_SPS_COUNT)
> + return AVERROR_INVALIDDATA;
> +
> + /* bit(5) reserved = ‘11111’b;
> + unsigned int (2) LengthSizeMinusOne
> + unsigned int (1) ptl_present_flag */
> + avio_w8(pb, vvcc->lengthSizeMinusOne << 1 | vvcc->ptl_present_flag | 0xf8);
> +
> + if(vvcc->ptl_present_flag) {
> + /*
> + * unsigned int(9) ols_idx;
> + * unsigned int(3) num_sublayers;
> + * unsigned int(2) constant_frame_rate;
> + * unsigned int(2) chroma_format_idc; */
> + avio_wb16(pb, vvcc->ols_idx << 7 | vvcc->num_sublayers << 4 | vvcc->constant_frame_rate << 2 | vvcc->chroma_format_idc);
> +
> + /* unsigned int(3) bit_depth_minus8;
> + bit(5) reserved = ‘11111’b;*/
> + avio_w8(pb, vvcc->bit_depth_minus8 << 5 | 0x1f);
> +
> + //VVCPTLRecord
> +
> + /* bit(2) reserved = ‘00’b;
> + unsigned int (6) num_bytes_constraint_info */
> + avio_w8(pb, vvcc->ptl.num_bytes_constraint_info & 0x3f);
> +
> + /* unsigned int (7) general_profile_idc
> + unsigned int (1) general_tier_flag */
> + avio_w8(pb, vvcc->ptl.general_profile_idc << 1 | vvcc->ptl.general_tier_flag);
> +
> + /* unsigned int (8) general_level_idc */
> + avio_w8(pb, vvcc->ptl.general_level_idc);
> +
> + /*
> + * unsigned int (1) ptl_frame_only_constraint_flag
> + * unsigned int (1) ptl_multilayer_enabled_flag
> + * unsigned int (8*num_bytes_constraint_info -2) general_constraint_info */
> + buf = (unsigned char *) malloc(sizeof(unsigned char) * vvcc->ptl.num_bytes_constraint_info);
> + *buf = vvcc->ptl.ptl_frame_only_constraint_flag << vvcc->ptl.num_bytes_constraint_info*8-1 | vvcc->ptl.ptl_multilayer_enabled_flag << vvcc->ptl.num_bytes_constraint_info*8-2 | *vvcc->ptl.general_constraint_info >> 2;
> + avio_write(pb, buf, vvcc->ptl.num_bytes_constraint_info);
> + free(buf);
> +
> + if(vvcc->num_sublayers > 1) {
> + uint8_t ptl_sublayer_level_present_flags = 0;
> + for(int i = vvcc->num_sublayers -2; i >= 0; i--) {
> + ptl_sublayer_level_present_flags = (ptl_sublayer_level_present_flags << 1 | vvcc->ptl.ptl_sublayer_level_present_flag[i]);
> + }
> + avio_w8(pb, ptl_sublayer_level_present_flags);
> + }
> +
> + for(int i = vvcc->num_sublayers -2; i >= 0; i--) {
> + if(vvcc->ptl.ptl_sublayer_level_present_flag[i])
> + avio_w8(pb, vvcc->ptl.sublayer_level_idc[i]);
> + }
> +
> + /* unsigned int(8) num_sub_profiles; */
> + avio_w8(pb, vvcc->ptl.ptl_num_sub_profiles);
> +
> + for(int j = 0; j < vvcc->ptl.ptl_num_sub_profiles; j++) {
> + /* unsigned int(32) general_sub_profile_idc[j]; */
> + avio_wb32(pb, vvcc->ptl.general_sub_profile_idc[j]);
> + }
> +
> + //End of VvcPTLRecord
> +
> + /*
> + * unsigned int(16) max_picture_width;*/
> + avio_wb16(pb, vvcc->max_picture_width);
> +
> + /*
> + * unsigned int(16) max_picture_height;*/
> + avio_wb16(pb, vvcc->max_picture_height);
> +
> + /*
> + * unsigned int(16) avg_frame_rate; */
> + avio_wb16(pb, vvcc->avg_frame_rate);
> + }
> +
> + /* unsigned int(8) num_of_arrays; */
> + avio_w8(pb, vvcc->num_of_arrays);
> +
> + for (i = 0; i < vvcc->num_of_arrays; i++) {
> + /*
> + * bit(1) array_completeness;
> + * unsigned int(2) reserved = 0;
> + * unsigned int(5) NAL_unit_type;
> + */
> + avio_w8(pb, vvcc->array[i].array_completeness << 7 |
> + vvcc->array[i].NAL_unit_type & 0x1f);
> + /* unsigned int(16) num_nalus; */
> + if(vvcc->array[i].NAL_unit_type != VVC_DCI_NUT && vvcc->array[i].NAL_unit_type != VVC_OPI_NUT)
> + avio_wb16(pb, vvcc->array[i].num_nalus);
> + for (j = 0; j < vvcc->array[i].num_nalus; j++) {
> + /* unsigned int(16) nal_unit_length; */
> + avio_wb16(pb, vvcc->array[i].nal_unit_length[j]);
> +
> + /* bit(8*nal_unit_length) nal_unit; */
> + avio_write(pb, vvcc->array[i].nal_unit[j], vvcc->array[i].nal_unit_length[j]);
> + }
> + }
> +
> + return 0;
> +}
> +
> +int ff_vvc_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[5] >> 3);
> +
> + buf += 4;
> +
> + switch (type) {
> + case VVC_VPS_NUT:
> + case VVC_SPS_NUT:
> + case VVC_PPS_NUT:
> + 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_vvc_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_vvc_annexb2mp4(pb, buf_in, *size, filter_ps, ps_count);
> + if (ret < 0) {
> + ffio_free_dyn_buf(&pb);
> + return ret;
> + }
> +
> + *size = avio_close_dyn_buf(pb, buf_out);
> +
> + return 0;
> +}
> +
> +int ff_isom_write_vvcc(AVIOContext *pb, const uint8_t *data,
> + int size, int ps_array_completeness)
> +{
> + VVCDecoderConfigurationRecord vvcc;
> + uint8_t *buf, *end, *start;
> + int ret;
> +
> + if (size < 6) {
> + /* We can't write a valid vvcc from the provided data */
> + return AVERROR_INVALIDDATA;
> + } else if (*data == 1) {
> + /* Data is already vvcc-formatted */
> + avio_write(pb, data, size);
> + return 0;
> + } else if (!(AV_RB24(data) == 1 || AV_RB32(data) == 1)) {
> + /* Not a valid Annex B start code prefix */
> + return AVERROR_INVALIDDATA;
> + }
> +
> + ret = ff_avc_parse_nal_units_buf(data, &start, &size);
> + if (ret < 0)
> + return ret;
> +
> + vvcc_init(&vvcc);
> +
> + buf = start;
> + end = start + size;
> +
> + while (end - buf > 4) {
> + uint32_t len = FFMIN(AV_RB32(buf), end - buf - 4);
> + uint8_t type = (buf[5] >> 3);
> +
> + buf += 4;
> +
> + switch (type) {
> + case VVC_OPI_NUT:
> + case VVC_VPS_NUT:
> + case VVC_SPS_NUT:
> + case VVC_PPS_NUT:
> + case VVC_PREFIX_SEI_NUT:
> + case VVC_SUFFIX_SEI_NUT:
> + ret = vvcc_add_nal_unit(buf, len, ps_array_completeness, &vvcc);
> + if (ret < 0)
> + goto end;
> + break;
> + default:
> + break;
> + }
> +
> + buf += len;
> + }
> +
> + ret = vvcc_write(pb, &vvcc);
> +
> +end:
> + vvcc_close(&vvcc);
> + av_free(start);
> + return ret;
> +}
> diff --git a/libavformat/vvc.h b/libavformat/vvc.h
> new file mode 100644
> index 0000000000..cdf4f6d3f5
> --- /dev/null
> +++ b/libavformat/vvc.h
> @@ -0,0 +1,99 @@
> +/*
> + * VVC helper functions for muxers
> + *
> + * This file is part of FFmpeg.
> + *
> + * FFmpeg is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU Lesser General Public
> + * License as published by the Free Software Foundation; either
> + * version 2.1 of the License, or (at your option) any later version.
> + *
> + * FFmpeg is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * Lesser General Public License for more details.
> + *
> + * You should have received a copy of the GNU Lesser General Public
> + * License along with FFmpeg; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
> + */
> +
> +/**
> + * @file
> + * internal header for VVC (de)muxer utilities
> + */
> +
> +#ifndef AVFORMAT_VVC_H
> +#define AVFORMAT_VVC_H
> +
> +#include <stdint.h>
> +#include "avio.h"
> +
> +/**
> + * Writes Annex B formatted VVC NAL units to the provided AVIOContext.
> + *
> + * The NAL units are converted to an MP4-compatible format (start code prefixes
> + * are replaced by 4-byte size fields, as per ISO/IEC 14496-15).
> + *
> + * If filter_ps is non-zero, any VVC parameter sets found in the input will be
> + * discarded, and *ps_count will be set to the number of discarded PS NAL units.
> + *
> + * @param pb address of the AVIOContext where the data shall be written
> + * @param buf_in address of the buffer holding the input data
> + * @param size size (in bytes) of the input buffer
> + * @param filter_ps whether to write parameter set NAL units to the output (0)
> + * or to discard them (non-zero)
> + * @param ps_count address of the variable where the number of discarded
> + * parameter set NAL units shall be written, may be NULL
> + * @return the amount (in bytes) of data written in case of success, a negative
> + * value corresponding to an AVERROR code in case of failure
> + */
> +int ff_vvc_annexb2mp4(AVIOContext *pb, const uint8_t *buf_in,
> + int size, int filter_ps, int *ps_count);
> +
> +/**
> + * Writes Annex B formatted VVC NAL units to a data buffer.
> + *
> + * The NAL units are converted to an MP4-compatible format (start code prefixes
> + * are replaced by 4-byte size fields, as per ISO/IEC 14496-15).
> + *
> + * If filter_ps is non-zero, any VVC parameter sets found in the input will be
> + * discarded, and *ps_count will be set to the number of discarded PS NAL units.
> + *
> + * On success, *size holds the size (in bytes) of the output data buffer.
> + *
> + * @param buf_in address of the buffer holding the input data
> + * @param size address of the variable holding the size (in bytes) of the input
> + * buffer (on input) and of the output buffer (on success)
> + * @param buf_out on success, address of the variable holding the address of
> + * the output buffer
> + * @param filter_ps whether to write parameter set NAL units to the output (0)
> + * or to discard them (non-zero)
> + * @param ps_count address of the variable where the number of discarded
> + * parameter set NAL units shall be written, may be NULL
> + * @return 0 in case of success, a negative value corresponding to an AVERROR
> + * code in case of failure
> + * @note *buf_out will be treated as uninitialized on input and won't be freed.
> + */
> +int ff_vvc_annexb2mp4_buf(const uint8_t *buf_in, uint8_t **buf_out,
> + int *size, int filter_ps, int *ps_count);
> +
> +/**
> + * Writes VVC extradata (parameter sets, declarative SEI NAL units) to the
> + * provided AVIOContext.
> + *
> + * If the extradata is Annex B format, it gets converted to vvcC format before
> + * writing.
> + *
> + * @param pb address of the AVIOContext where the vvcC shall be written
> + * @param data address of the buffer holding the data needed to write the vvcC
> + * @param size size (in bytes) of the data buffer
> + * @param ps_array_completeness whether all parameter sets are in the vvcC (1)
> + * or there may be additional parameter sets in the bitstream (0)
> + * @return >=0 in case of success, a negative value corresponding to an AVERROR
> + * code in case of failure
> + */
> +int ff_isom_write_vvcc(AVIOContext *pb, const uint8_t *data,
> + int size, int ps_array_completeness);
> +
> +#endif /* AVFORMAT_VVC_H */
> diff --git a/libavformat/vvcdec.c b/libavformat/vvcdec.c
> new file mode 100644
> index 0000000000..304f900966
> --- /dev/null
> +++ b/libavformat/vvcdec.c
> @@ -0,0 +1,61 @@
> +/*
> + * RAW VVC video demuxer
> + * Copyright (c) 2020 Nuo Mi <nuomi2021 at gmail.com>
> + *
> + * This file is part of FFmpeg.
> + *
> + * FFmpeg is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU Lesser General Public
> + * License as published by the Free Software Foundation; either
> + * version 2.1 of the License, or (at your option) any later version.
> + *
> + * FFmpeg is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * Lesser General Public License for more details.
> + *
> + * You should have received a copy of the GNU Lesser General Public
> + * License along with FFmpeg; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
> + */
> +
> +#include "libavcodec/vvc.h"
> +
> +#include "avformat.h"
> +#include "rawdec.h"
> +
> +static int vvc_probe(const AVProbeData *p)
> +{
> + uint32_t code = -1;
> + int sps = 0, pps = 0, irap = 0;
> + int i;
> +
> + for (i = 0; i < p->buf_size - 1; i++) {
> + code = (code << 8) + p->buf[i];
> + if ((code & 0xffffff00) == 0x100) {
> + uint8_t nal2 = p->buf[i + 1];
> + int type = (nal2 & 0xF8) >> 3;
> +
> + if (code & 0x80) // forbidden_zero_bit
> + return 0;
> +
> + if ((nal2 & 0x7) == 0) // nuh_temporal_id_plus1
> + return 0;
> +
> + switch (type) {
> + case VVC_SPS_NUT: sps++; break;
> + case VVC_PPS_NUT: pps++; break;
> + case VVC_IDR_N_LP:
> + case VVC_IDR_W_RADL:
> + case VVC_CRA_NUT:
> + case VVC_GDR_NUT: irap++; break;
> + }
> + }
> + }
> +
> + if (sps && pps && irap)
> + return AVPROBE_SCORE_EXTENSION + 1; // 1 more than .mpg
> + return 0;
> +}
> +
> +FF_DEF_RAWVIDEO_DEMUXER(vvc, "raw VVC video", vvc_probe, "h266,266,vvc", AV_CODEC_ID_VVC)
> --
> 2.25.1
>
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--
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