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xwma: Avoid division by zero

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Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2013-09-28 23:13:26 +03:00
parent 8d07258bb6
commit adc09136a4
1 changed files with 8 additions and 0 deletions
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8
libavformat/xwma.c
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@ -198,6 +198,14 @@ static int xwma_read_header(AVFormatContext *s)
/* Estimate the duration from the total number of output bytes. */
const uint64_t total_decoded_bytes = dpds_table[dpds_table_size - 1];
if (!bytes_per_sample) {
av_log(s, AV_LOG_ERROR,
"Invalid bits_per_coded_sample %d for %d channels\n",
st->codec->bits_per_coded_sample, st->codec->channels);
return AVERROR_INVALIDDATA;
}
st->duration = total_decoded_bytes / bytes_per_sample;
/* Use the dpds data to build a seek table. We can only do this after