On Tue, Jun 10, 2025 at 12:25:24AM +0200, Andreas Rheinhardt wrote:
> Peter Ross:
> > ---
> > libavformat/aiff.c | 1 +
> > libavformat/aiffdec.c | 3 +++
> > 2 files changed, 4 insertions(+)
> >
> > diff --git a/libavformat/aiff.c b/libavformat/aiff.c
> > index 1ceac69a70..907f7d8d28 100644
> > --- a/libavformat/aiff.c
> > +++ b/libavformat/aiff.c
> > @@ -40,6 +40,7 @@ const AVCodecTag ff_codec_aiff_tags[] = {
> > { AV_CODEC_ID_GSM, MKTAG('G','S','M',' ') },
> > { AV_CODEC_ID_ADPCM_G722, MKTAG('G','7','2','2') },
> > { AV_CODEC_ID_ADPCM_G726LE, MKTAG('G','7','2','6') },
> > + { AV_CODEC_ID_G728, MKTAG('G','7','2','8') },
> > { AV_CODEC_ID_PCM_S16BE, MKTAG('t','w','o','s') },
> > { AV_CODEC_ID_PCM_S16LE, MKTAG('s','o','w','t') },
> > { AV_CODEC_ID_ADPCM_IMA_QT, MKTAG('i','m','a','4') },
> > diff --git a/libavformat/aiffdec.c b/libavformat/aiffdec.c
> > index bd5bd2e4bb..aeb00cccd0 100644
> > --- a/libavformat/aiffdec.c
> > +++ b/libavformat/aiffdec.c
> > @@ -174,6 +174,9 @@ static int get_aiff_header(AVFormatContext *s, int64_t
> > size,
> > case AV_CODEC_ID_GSM:
> > par->block_align = 33;
> > break;
> > + case AV_CODEC_ID_G728:
> > + par->block_align = 5;
> > + break;
> > default:
> > aiff->block_duration = 1;
> > break;
> >
> Is this and the riff patch based on some spec or are you just inventing
> things here?No inventions. The aiff patch is based on sample here: https://www.mmsp.ece.mcgill.ca/Documents/AudioFormats/AIFF/Samples.html Search for G.728. I am unsure what software was used to create that sample. The riff twocc's originate from binary G.728 ACM DLLs: kdg728.acm "Kedacom G.728" 0x0041 plcmg728.acm "Polycom G.728" 0xCD02 I have tested remuxing raw G.728 into riff wav using ffmpeg, and playing them back on windows using the ACM DLLs. -- Peter (A907 E02F A6E5 0CD2 34CD 20D2 6760 79C5 AC40 DD6B)
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