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avformat/mxfdec: check sample size more completely

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Fixes division by zero
Fixes Ticket2992

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-09-27 18:54:58 +02:00
parent e064d0aaf6
commit 9790a03e67
1 changed files with 3 additions and 1 deletions
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4
libavformat/mxfdec.c
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@ -2195,7 +2195,9 @@ static int mxf_set_audio_pts(MXFContext *mxf, AVCodecContext *codec, AVPacket *p
{
MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data;
pkt->pts = track->sample_count;
if (codec->channels <= 0 || av_get_bits_per_sample(codec->codec_id) <= 0)
if ( codec->channels <= 0
|| av_get_bits_per_sample(codec->codec_id) <= 0
|| codec->channels * (int64_t)av_get_bits_per_sample(codec->codec_id) < 8)
return AVERROR(EINVAL);
track->sample_count += pkt->size / (codec->channels * (int64_t)av_get_bits_per_sample(codec->codec_id) / 8);
return 0;