[FFmpeg-devel] [PATCH v1 2/5] avformat: add muxer support for H266/VVC

Ridley Combs rcombs at rcombs.me
Thu Jan 18 12:43:24 EET 2024



> On Jan 4, 2024, at 16:31, James Almer <jamrial at gmail.com> wrote:
> 
> On 11/3/2023 6:57 AM, Thomas Siedel wrote:
>> Add muxer for vvcc byte stream format.
>> Add AV_CODEC_ID_VVC to ff_mp4_obj_type.
>> Add AV_CODEC_ID_VVC to ISO Media codec (VvcConfigurationBox vvi1,
>> vvc1 defined in ISO/IEC 14496-15:2021).
>> Add VvcConfigurationBox vvcC which extends FullBox type in
>> ISO/IEC 14496-15:2021.
>> Add ff_vvc_muxer to RAW muxers.
>> Signed-off-by: Thomas Siedel <thomas.ff at spin-digital.com>
>> ---
>>  libavformat/Makefile    |   6 +-
>>  libavformat/isom.c      |   1 +
>>  libavformat/isom_tags.c |   3 +
>>  libavformat/mov.c       |   6 +
>>  libavformat/movenc.c    |  41 +-
>>  libavformat/vvc.c       | 998 ++++++++++++++++++++++++++++++++++++++++
>>  libavformat/vvc.h       |  99 ++++
>>  7 files changed, 1150 insertions(+), 4 deletions(-)
>>  create mode 100644 libavformat/vvc.c
>>  create mode 100644 libavformat/vvc.h
>> diff --git a/libavformat/Makefile b/libavformat/Makefile
>> index 329055ccfd..595f6bdf08 100644
>> --- a/libavformat/Makefile
>> +++ b/libavformat/Makefile
>> @@ -341,7 +341,7 @@ OBJS-$(CONFIG_MATROSKA_DEMUXER)          += matroskadec.o matroska.o  \
>>                                              oggparsevorbis.o vorbiscomment.o \
>>                                              qtpalette.o replaygain.o dovi_isom.o
>>  OBJS-$(CONFIG_MATROSKA_MUXER)            += matroskaenc.o matroska.o \
>> -                                            av1.o avc.o hevc.o \
>> +                                            av1.o avc.o hevc.o vvc.o\
>>                                              flacenc_header.o avlanguage.o \
>>                                              vorbiscomment.o wv.o dovi_isom.o
>>  OBJS-$(CONFIG_MCA_DEMUXER)               += mca.o
>> @@ -363,7 +363,7 @@ OBJS-$(CONFIG_MODS_DEMUXER)              += mods.o
>>  OBJS-$(CONFIG_MOFLEX_DEMUXER)            += moflex.o
>>  OBJS-$(CONFIG_MOV_DEMUXER)               += mov.o mov_chan.o mov_esds.o \
>>                                              qtpalette.o replaygain.o dovi_isom.o
>> -OBJS-$(CONFIG_MOV_MUXER)                 += movenc.o av1.o avc.o hevc.o vpcc.o \
>> +OBJS-$(CONFIG_MOV_MUXER)                 += movenc.o av1.o avc.o hevc.o vvc.o vpcc.o \
>>                                              movenchint.o mov_chan.o rtp.o \
>>                                              movenccenc.o movenc_ttml.o rawutils.o \
>>                                              dovi_isom.o evc.o
>> @@ -516,7 +516,7 @@ OBJS-$(CONFIG_RTP_MUXER)                 += rtp.o         \
>>                                              rtpenc_vp8.o  \
>>                                              rtpenc_vp9.o                \
>>                                              rtpenc_xiph.o \
>> -                                            avc.o hevc.o
>> +                                            avc.o hevc.o vvc.o
>>  OBJS-$(CONFIG_RTSP_DEMUXER)              += rtsp.o rtspdec.o httpauth.o \
>>                                              urldecode.o
>>  OBJS-$(CONFIG_RTSP_MUXER)                += rtsp.o rtspenc.o httpauth.o \
>> diff --git a/libavformat/isom.c b/libavformat/isom.c
>> index 6d019881e5..9fbccd4437 100644
>> --- a/libavformat/isom.c
>> +++ b/libavformat/isom.c
>> @@ -36,6 +36,7 @@ const AVCodecTag ff_mp4_obj_type[] = {
>>      { AV_CODEC_ID_MPEG4       , 0x20 },
>>      { AV_CODEC_ID_H264        , 0x21 },
>>      { AV_CODEC_ID_HEVC        , 0x23 },
>> +    { AV_CODEC_ID_VVC         , 0x33 },
>>      { AV_CODEC_ID_AAC         , 0x40 },
>>      { AV_CODEC_ID_MP4ALS      , 0x40 }, /* 14496-3 ALS */
>>      { AV_CODEC_ID_MPEG2VIDEO  , 0x61 }, /* MPEG-2 Main */
>> diff --git a/libavformat/isom_tags.c b/libavformat/isom_tags.c
>> index a575b7c160..705811e950 100644
>> --- a/libavformat/isom_tags.c
>> +++ b/libavformat/isom_tags.c
>> @@ -123,6 +123,9 @@ const AVCodecTag ff_codec_movvideo_tags[] = {
>>      { AV_CODEC_ID_HEVC, MKTAG('d', 'v', 'h', 'e') }, /* HEVC-based Dolby Vision derived from hev1 */
>>                                                       /* dvh1 is handled within mov.c */
>>  +    { AV_CODEC_ID_VVC, MKTAG('v', 'v', 'i', '1') },  /* VVC/H.266 which indicates parameter sets may be in ES */
>> +    { AV_CODEC_ID_VVC, MKTAG('v', 'v', 'c', '1') },  /* VVC/H.266 which indicates parameter shall not be in ES */
>> +
>>      { AV_CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') }, /* AVC-1/H.264 */
>>      { AV_CODEC_ID_H264, MKTAG('a', 'v', 'c', '2') },
>>      { AV_CODEC_ID_H264, MKTAG('a', 'v', 'c', '3') },
>> diff --git a/libavformat/mov.c b/libavformat/mov.c
>> index e8efccf6eb..11b43ac135 100644
>> --- a/libavformat/mov.c
>> +++ b/libavformat/mov.c
>> @@ -2117,6 +2117,11 @@ static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
>>      if ((uint64_t)atom.size > (1<<30))
>>          return AVERROR_INVALIDDATA;
>>  +    if (atom.type == MKTAG('v','v','c','C')) {
>> +        avio_rb32(pb);
> 
> avio_skip(pb, 4);
> 
>> +        atom.size -= 4;
>> +    }
>> +
>>      if (atom.size >= 10) {
>>          // Broken files created by legacy versions of libavformat will
>>          // wrap a whole fiel atom inside of a glbl atom.
>> @@ -7921,6 +7926,7 @@ static const MOVParseTableEntry mov_default_parse_table[] = {
>>  { MKTAG('s','g','p','d'), mov_read_sgpd },
>>  { MKTAG('s','b','g','p'), mov_read_sbgp },
>>  { MKTAG('h','v','c','C'), mov_read_glbl },
>> +{ MKTAG('v','v','c','C'), mov_read_glbl },
>>  { MKTAG('u','u','i','d'), mov_read_uuid },
>>  { MKTAG('C','i','n', 0x8e), mov_read_targa_y216 },
>>  { MKTAG('f','r','e','e'), mov_read_free },
>> diff --git a/libavformat/movenc.c b/libavformat/movenc.c
>> index e39f1ac987..093a04d0c2 100644
>> --- a/libavformat/movenc.c
>> +++ b/libavformat/movenc.c
>> @@ -68,6 +68,7 @@
>>  #include "ttmlenc.h"
>>  #include "version.h"
>>  #include "vpcc.h"
>> +#include "vvc.h"
>>    static const AVOption options[] = {
>>      { "movflags", "MOV muxer flags", offsetof(MOVMuxContext, flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
>> @@ -1473,6 +1474,23 @@ static int mov_write_evcc_tag(AVIOContext *pb, MOVTrack *track)
>>      return update_size(pb, pos);
>>  }
>>  +static int mov_write_vvcc_tag(AVIOContext *pb, MOVTrack *track)
>> +{
>> +    int64_t pos = avio_tell(pb);
>> +
>> +    avio_wb32(pb, 0);
>> +    ffio_wfourcc(pb, "vvcC");
>> +
>> +    avio_w8  (pb, 0); /* version */
>> +    avio_wb24(pb, 0); /* flags */
> 
> Is it really a fullbox? I find it odd considering h264 and h265 don't.

It is; no idea why.

> 
>> +
>> +    if (track->tag == MKTAG('v','v','c','1'))
>> +        ff_isom_write_vvcc(pb, track->vos_data, track->vos_len, 1);
>> +    else
>> +        ff_isom_write_vvcc(pb, track->vos_data, track->vos_len, 0);
>> +    return update_size(pb, pos);
>> +}
>> +
>>  /* also used by all avid codecs (dv, imx, meridien) and their variants */
>>  static int mov_write_avid_tag(AVIOContext *pb, MOVTrack *track)
>>  {
>> @@ -2382,6 +2400,8 @@ static int mov_write_video_tag(AVFormatContext *s, AVIOContext *pb, MOVMuxContex
>>          avid = 1;
>>      } else if (track->par->codec_id == AV_CODEC_ID_HEVC)
>>          mov_write_hvcc_tag(pb, track);
>> +    else if (track->par->codec_id == AV_CODEC_ID_VVC)
>> +        mov_write_vvcc_tag(pb, track);
>>      else if (track->par->codec_id == AV_CODEC_ID_H264 && !TAG_IS_AVCI(track->tag)) {
>>          mov_write_avcc_tag(pb, track);
>>          if (track->mode == MODE_IPOD)
>> @@ -6170,6 +6190,7 @@ int ff_mov_write_packet(AVFormatContext *s, AVPacket *pkt)
>>      if ((par->codec_id == AV_CODEC_ID_DNXHD ||
>>           par->codec_id == AV_CODEC_ID_H264 ||
>>           par->codec_id == AV_CODEC_ID_HEVC ||
>> +         par->codec_id == AV_CODEC_ID_VVC ||
>>           par->codec_id == AV_CODEC_ID_VP9 ||
>>           par->codec_id == AV_CODEC_ID_EVC ||
>>           par->codec_id == AV_CODEC_ID_TRUEHD) && !trk->vos_len &&
>> @@ -6235,6 +6256,18 @@ int ff_mov_write_packet(AVFormatContext *s, AVPacket *pkt)
>>                  size = ff_hevc_annexb2mp4(pb, pkt->data, pkt->size, 0, NULL);
>>              }
>>          }
>> +    } else if (par->codec_id == AV_CODEC_ID_VVC && trk->vos_len > 6 &&
>> +             (AV_RB24(trk->vos_data) == 1 || AV_RB32(trk->vos_data) == 1)) {
>> +      /* extradata is Annex B, assume the bitstream is too and convert it */
>> +      if (trk->hint_track >= 0 && trk->hint_track < mov->nb_streams) {
>> +            ret = ff_h266_annexb2mp4_buf(pkt->data, &reformatted_data,
>> +                                         &size, 0, NULL);
>> +            if (ret < 0)
>> +                return ret;
>> +            avio_write(pb, reformatted_data, size);
>> +      } else {
>> +          size = ff_h266_annexb2mp4(pb, pkt->data, pkt->size, 0, NULL);
>> +      }
>>      } else if (par->codec_id == AV_CODEC_ID_AV1) {
>>          if (trk->hint_track >= 0 && trk->hint_track < mov->nb_streams) {
>>              ret = ff_av1_filter_obus_buf(pkt->data, &reformatted_data,
>> @@ -6281,6 +6314,9 @@ int ff_mov_write_packet(AVFormatContext *s, AVPacket *pkt)
>>              } else if(par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 21) {
>>                  int nal_size_length = (par->extradata[21] & 0x3) + 1;
>>                  ret = ff_mov_cenc_avc_write_nal_units(s, &trk->cenc, nal_size_length, pb, pkt->data, size);
>> +            } else if(par->codec_id == AV_CODEC_ID_VVC && par->extradata_size > 21) {
>> +                int nal_size_length = (par->extradata[21] & 0x3) + 1;
> 
> Is this really at the exact same offset as in hevc?
> 
>> +                ret = ff_mov_cenc_avc_write_nal_units(s, &trk->cenc, nal_size_length, pb, pkt->data, size);
>>              } else {
>>                  ret = ff_mov_cenc_write_packet(&trk->cenc, pb, pkt->data, size);
>>              }
>> @@ -7363,7 +7399,8 @@ static int mov_init(AVFormatContext *s)
>>            if (mov->encryption_scheme == MOV_ENC_CENC_AES_CTR) {
>>              ret = ff_mov_cenc_init(&track->cenc, mov->encryption_key,
>> -                (track->par->codec_id == AV_CODEC_ID_H264 || track->par->codec_id == AV_CODEC_ID_HEVC),
>> +                (track->par->codec_id == AV_CODEC_ID_H264 || track->par->codec_id == AV_CODEC_ID_HEVC ||
>> +                 track->par->codec_id == AV_CODEC_ID_VVC),
>>                  s->flags & AVFMT_FLAG_BITEXACT);
>>              if (ret)
>>                  return ret;
>> @@ -7832,6 +7869,8 @@ static const AVCodecTag codec_mp4_tags[] = {
>>      { AV_CODEC_ID_HEVC,            MKTAG('h', 'e', 'v', '1') },
>>      { AV_CODEC_ID_HEVC,            MKTAG('h', 'v', 'c', '1') },
>>      { AV_CODEC_ID_HEVC,            MKTAG('d', 'v', 'h', '1') },
>> +    { AV_CODEC_ID_VVC,             MKTAG('v', 'v', 'c', '1') },
>> +    { AV_CODEC_ID_VVC,             MKTAG('v', 'v', 'i', '1') },
>>      { AV_CODEC_ID_EVC,             MKTAG('e', 'v', 'c', '1') },
>>      { AV_CODEC_ID_MPEG2VIDEO,      MKTAG('m', 'p', '4', 'v') },
>>      { AV_CODEC_ID_MPEG1VIDEO,      MKTAG('m', 'p', '4', 'v') },
>> diff --git a/libavformat/vvc.c b/libavformat/vvc.c
>> new file mode 100644
>> index 0000000000..8ec0136862
>> --- /dev/null
>> +++ b/libavformat/vvc.c
>> @@ -0,0 +1,998 @@
>> +/*
>> + * H.266/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;
>> +
>> +    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);
>> +    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_flag[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 following applies:
>> +    * • The value of array_completeness shall be equal to 1 for arrays of SPS,
>> +    *   and PPS NAL units.
>> +    * • If a VVC bitstream includes DCI NAL unit(s), the value of
>> +    *   array_completeness shall be equal to 1 for the array of DCI units.
>> +    *   Otherwise, NAL_unit_type shall not indicate DCI NAL units.
>> +    * • If a VVC bitstream includes VPS NAL unit(s), the value of
>> +    *   array_completeness shall be equal to 1 for the array of VPS NAL units.
>> +    *   Otherwise, NAL_unit_type shall not indicate VPS NAL units.
>> +    * When the value of array_completeness is equal to 1 for an array of a
>> +    * particular NAL_unit_type value, NAL units of that NAL_unit_type value
>> +    * cannot be updated without causing a different sample entry to be used.
>> +    * When the sample entry name is 'vvi1', the value of array_completeness
>> +    * of at least one of the following arrays shall be equal to 0:
>> +      • The array of DCI NAL units, if present.
>> +      • The array of VPS NAL units, if present.
>> +      • The array of SPS NAL units
>> +      • The array of PPS NAL units.
>> +    */
>> +    if (nal_type == VVC_VPS_NUT || nal_type == VVC_SPS_NUT ||
>> +        nal_type == VVC_PPS_NUT || nal_type == VVC_DCI_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_h266_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_h266_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_h266_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..f58145e4ae
>> --- /dev/null
>> +++ b/libavformat/vvc.h
>> @@ -0,0 +1,99 @@
>> +/*
>> + * H.266 / 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 H.266/VVC (de)muxer utilities
>> + */
>> +
>> +#ifndef AVFORMAT_H266_H
>> +#define AVFORMAT_H266_H
>> +
>> +#include <stdint.h>
>> +#include "avio.h"
>> +
>> +/**
>> + * Writes Annex B formatted H.266/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_h266_annexb2mp4(AVIOContext *pb, const uint8_t *buf_in,
>> +                      int size, int filter_ps, int *ps_count);
>> +
>> +/**
>> + * Writes Annex B formatted H.266/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_h266_annexb2mp4_buf(const uint8_t *buf_in, uint8_t **buf_out,
>> +                          int *size, int filter_ps, int *ps_count);
>> +
>> +/**
>> + * Writes H.266/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_H266_H */
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel at ffmpeg.org
> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
> 
> To unsubscribe, visit link above, or email
> ffmpeg-devel-request at ffmpeg.org with subject "unsubscribe".



More information about the ffmpeg-devel mailing list