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avformat/argo_asf: fix handling of v1.1 files

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Version 1.1 (FX Fighter) files all have a sample rate of 44100
in the header, but only play back correctly at 22050.

Force the sample rate to 22050 when reading, and restrict it
when muxing.
This commit is contained in:
Zane van Iperen 2020-09-05 21:30:12 +10:00
parent 5c2c35da12
commit d2f7b39914
No known key found for this signature in database
GPG Key ID: 68616B2D8AC4DCC5
1 changed files with 17 additions and 2 deletions
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15
libavformat/argo_asf.c
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@ -187,6 +187,10 @@ static int argo_asf_read_header(AVFormatContext *s)
st->codecpar->channels = 1;
}
/* v1.1 files (FX Fighter) are all marked as 44100, but are actually 22050. */
if (asf->fhdr.version_major == 1 && asf->fhdr.version_minor == 1)
st->codecpar->sample_rate = 22050;
else
st->codecpar->sample_rate = asf->ckhdr.sample_rate;
st->codecpar->bits_per_coded_sample = 4;
@ -264,6 +268,7 @@ AVInputFormat ff_argo_asf_demuxer = {
#if CONFIG_ARGO_ASF_MUXER
static int argo_asf_write_init(AVFormatContext *s)
{
ArgoASFMuxContext *ctx = s->priv_data;
const AVCodecParameters *par;
if (s->nb_streams != 1) {
@ -279,6 +284,11 @@ static int argo_asf_write_init(AVFormatContext *s)
return AVERROR(EINVAL);
}
if (ctx->version_major == 1 && ctx->version_minor == 1 && par->sample_rate != 22050) {
av_log(s, AV_LOG_ERROR, "ASF v1.1 files only support a sample rate of 22050\n");
return AVERROR(EINVAL);
}
if (par->channels > 2) {
av_log(s, AV_LOG_ERROR, "ASF files only support up to 2 channels\n");
return AVERROR(EINVAL);
@ -351,7 +361,12 @@ static int argo_asf_write_header(AVFormatContext *s)
chdr.num_blocks = 0;
chdr.num_samples = ASF_SAMPLE_COUNT;
chdr.unk1 = 0;
if (ctx->version_major == 1 && ctx->version_minor == 1)
chdr.sample_rate = 44100;
else
chdr.sample_rate = par->sample_rate;
chdr.unk2 = ~0;
chdr.flags = ASF_CF_BITS_PER_SAMPLE | ASF_CF_ALWAYS1;