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avformat/wavdec: Detect wrongly interpreted specification about the sample value in the fact chunk

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Fixes Ticket703

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-08-13 12:14:53 +02:00
parent 4ec4454ccf
commit acbd78a001
1 changed files with 9 additions and 0 deletions
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9
libavformat/wavdec.c
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@ -434,6 +434,15 @@ break_loop:
data_size = 0;
}
if ( st->codec->bit_rate > 0 && data_size > 0
&& st->codec->sample_rate > 0
&& sample_count > 0 && st->codec->channels > 1
&& sample_count % st->codec->channels == 0) {
if (fabs(8.0 * data_size * st->codec->channels * st->codec->sample_rate /
sample_count /st->codec->bit_rate - 1.0) < 0.3)
sample_count /= st->codec->channels;
}
if ( data_size > 0 && sample_count && st->codec->channels
&& (data_size << 3) / sample_count / st->codec->channels > st->codec->bits_per_coded_sample + 1) {
av_log(s, AV_LOG_WARNING, "ignoring wrong sample_count %"PRId64"\n", sample_count);