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avformat/vpk: check samples_per_block size

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2015-11-21 21:58:24 +01:00
parent 8b1bc2b075
commit 16195aad75
1 changed files with 2 additions and 0 deletions
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2
libavformat/vpk.c
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@ -62,6 +62,8 @@ static int vpk_read_header(AVFormatContext *s)
if (st->codec->channels <= 0)
return AVERROR_INVALIDDATA;
samples_per_block = ((st->codec->block_align / st->codec->channels) * 28) / 16;
if (samples_per_block <= 0)
return AVERROR_INVALIDDATA;
vpk->block_count = (st->duration + (samples_per_block - 1)) / samples_per_block;
vpk->last_block_size = (st->duration % samples_per_block) * 16 * st->codec->channels / 28;
avio_skip(s->pb, offset - avio_tell(s->pb));