[FFmpeg-devel] [PATCH] avformat/matroska: Add support for A_ATRAC/AT1

[asivery]

Hello, apologies for bothering you all with this, but if anyone could take a look at this patch it would be great. The only other container that supports ATRAC1 is AEA, and it's not that good of a format since it has no magic number, and therefore is easily detected incorrectly.

Thank you in advance.

------- Original Message -------
On Monday, April 17th, 2023 at 2:27 AM, asivery <asivery at protonmail.com> wrote:


> I'd appreciate it if someone took a look at this.
> If there's anything I need to change to make this patch viable for merging, please let me know.
> 
> Best regards,
> asivery
> ------- Original Message -------
> On Monday, March 6th, 2023 at 7:51 PM, asivery asivery at protonmail.com wrote:
> 
> 
> 
> > It's been added recently. Here's the definition: https://github.com/ietf-wg-cellar/matroska-specification/blob/master/codec_specs.md#a_atracat1
> > 
> > ------- Original Message -------
> > On Monday, March 6th, 2023 at 7:39 PM, Paul B Mahol onemda at gmail.com wrote:
> > 
> > > On 3/6/23, asivery asivery at protonmail.com wrote:
> > > 
> > > > Signed-off-by: asivery asivery at protonmail.com
> > > > ---
> > > > libavformat/matroska.c | 1 +
> > > > libavformat/matroskadec.c | 2 ++
> > > > 2 files changed, 3 insertions(+)
> > > 
> > > where is this defined?
> > > 
> > > > diff --git a/libavformat/matroska.c b/libavformat/matroska.c
> > > > index 90d94b65bf..37305a523c 100644
> > > > --- a/libavformat/matroska.c
> > > > +++ b/libavformat/matroska.c
> > > > @@ -55,6 +55,7 @@ const CodecTags ff_mkv_codec_tags[]={
> > > > {"A_REAL/ATRC" , AV_CODEC_ID_ATRAC3},
> > > > {"A_REAL/COOK" , AV_CODEC_ID_COOK},
> > > > {"A_REAL/SIPR" , AV_CODEC_ID_SIPR},
> > > > + {"A_ATRAC/AT1" , AV_CODEC_ID_ATRAC1},
> > > > {"A_TRUEHD" , AV_CODEC_ID_TRUEHD},
> > > > {"A_TTA1" , AV_CODEC_ID_TTA},
> > > > {"A_VORBIS" , AV_CODEC_ID_VORBIS},
> > > > diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
> > > > index d582f566a2..0aa8e6f3b3 100644
> > > > --- a/libavformat/matroskadec.c
> > > > +++ b/libavformat/matroskadec.c
> > > > @@ -2795,6 +2795,8 @@ static int matroska_parse_tracks(AVFormatContext s)
> > > > track->audio.frame_size);
> > > > if (!track->audio.buf)
> > > > return AVERROR(ENOMEM);
> > > > + } else if (codec_id == AV_CODEC_ID_ATRAC1) {
> > > > + st->codecpar->block_align = track->audio.channels * 212; / Constant ATRAC
> > > > frame size */
> > > > } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
> > > > ret = matroska_parse_flac(s, track, &extradata_offset);
> > > > if (ret < 0)
> > > > --
> > > > 2.34.1
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