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avcodec/utils: don't return negative values in av_get_audio_frame_duration()

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In some extrme cases, like with adpcm_ms samples with an extremely high channel
count, get_audio_frame_duration() may return a negative frame duration value.
Don't propagate it, and instead return 0, signaling that a duration could not
be determined.

Fixes ticket #9312

Signed-off-by: James Almer <jamrial@gmail.com>
(cherry picked from commit e01d306c64)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
James Almer 2021-07-21 01:02:44 -03:00 committed by Michael Niedermayer
parent 608be8437b
commit dfb9a3f7f3
1 changed files with 4 additions and 2 deletions
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6
libavcodec/utils.c
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@ -1774,20 +1774,22 @@ static int get_audio_frame_duration(enum AVCodecID id, int sr, int ch, int ba,
int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
{
return get_audio_frame_duration(avctx->codec_id, avctx->sample_rate,
int duration = get_audio_frame_duration(avctx->codec_id, avctx->sample_rate,
avctx->channels, avctx->block_align,
avctx->codec_tag, avctx->bits_per_coded_sample,
avctx->bit_rate, avctx->extradata, avctx->frame_size,
frame_bytes);
return FFMAX(0, duration);
}
int av_get_audio_frame_duration2(AVCodecParameters *par, int frame_bytes)
{
return get_audio_frame_duration(par->codec_id, par->sample_rate,
int duration = get_audio_frame_duration(par->codec_id, par->sample_rate,
par->channels, par->block_align,
par->codec_tag, par->bits_per_coded_sample,
par->bit_rate, par->extradata, par->frame_size,
frame_bytes);
return FFMAX(0, duration);
}
#if !HAVE_THREADS