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Code Issues Releases Activity

avformat/movenc: Add AVS3 support

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'avs3' is registered at mp4ra.org. The Avs3ConfigurationBox 'av3c'
inside 'avs3' hasn't been registered yet, but is specified by the
AVS3 spec.

Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>
This commit is contained in:
Zhao Zhili
2025-02-18 19:24:48 +08:00
parent 71a91485fa
commit a053516e64
1 changed files with 36 additions and 0 deletions
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36
libavformat/movenc.c
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@ -1540,6 +1540,38 @@ static int mov_write_avcc_tag(AVIOContext *pb, MOVTrack *track)
return update_size(pb, pos);
}
/* AVS3 Intelligent Media Coding
* Information Technology - Intelligent Media Coding
* Part 6: Intelligent Media Format
*/
static int mov_write_av3c(AVIOContext *pb, const uint8_t *data, int len)
{
if (len < 4)
return AVERROR_INVALIDDATA;
if (data[0] == 1) {
// In Avs3DecoderConfigurationRecord format
avio_write(pb, data, len);
return 0;
}
avio_w8(pb, 1); // version
avio_wb16(pb, len); // sequence_header_length
avio_write(pb, data, len); // sequence_header
avio_w8(pb, 0xFC); // Only support library_dependency_idc = 0
return 0;
}
static int mov_write_av3c_tag(AVIOContext *pb, MOVTrack *track)
{
int64_t pos = avio_tell(pb);
avio_wb32(pb, 0);
ffio_wfourcc(pb, "av3c");
mov_write_av3c(pb, track->vos_data, track->vos_len);
return update_size(pb, pos);
}
static int mov_write_vpcc_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
{
int64_t pos = avio_tell(pb);
@ -2738,6 +2770,8 @@ static int mov_write_video_tag(AVFormatContext *s, AVIOContext *pb, MOVMuxContex
} else if (track->par->codec_id == AV_CODEC_ID_R10K) {
if (track->par->codec_tag == MKTAG('R','1','0','k'))
mov_write_dpxe_tag(pb, track);
} else if (track->par->codec_id == AV_CODEC_ID_AVS3) {
mov_write_av3c_tag(pb, track);
} else if (track->vos_len > 0)
mov_write_glbl_tag(pb, track);
@ -8646,6 +8680,8 @@ static const AVCodecTag codec_mp4_tags[] = {
{ AV_CODEC_ID_PCM_F64BE, MOV_MP4_FPCM_TAG },
{ AV_CODEC_ID_PCM_F64LE, MOV_MP4_FPCM_TAG },
{ AV_CODEC_ID_AVS3, MKTAG('a', 'v', 's', '3') },
{ AV_CODEC_ID_NONE, 0 },
};
#if CONFIG_MP4_MUXER || CONFIG_PSP_MUXER