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mvi: Add sanity checking for the audio frame size

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This avoids a division by zero.

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 23:26:18 +03:00
parent 59480abce7
commit 28ff439efd
1 changed files with 6 additions and 0 deletions
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6
libavformat/mvi.c
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@ -94,6 +94,12 @@ static int read_header(AVFormatContext *s)
mvi->get_int = (vst->codec->width * vst->codec->height < (1 << 16)) ? avio_rl16 : avio_rl24;
mvi->audio_frame_size = ((uint64_t)mvi->audio_data_size << MVI_FRAC_BITS) / frames_count;
if (mvi->audio_frame_size <= 1 << MVI_FRAC_BITS - 1) {
av_log(s, AV_LOG_ERROR, "Invalid audio_data_size (%d) or frames_count (%d)\n",
mvi->audio_data_size, frames_count);
return AVERROR_INVALIDDATA;
}
mvi->audio_size_counter = (ast->codec->sample_rate * 830 / mvi->audio_frame_size - 1) * mvi->audio_frame_size;
mvi->audio_size_left = mvi->audio_data_size;