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westwood_vqa: fix null pointer dereference

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Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2012-12-14 17:55:25 +01:00
parent 3c5c6b9d61
commit b2c2589ecf
1 changed files with 2 additions and 1 deletions
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3
libavformat/westwood_vqa.c
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@@ -233,7 +233,8 @@ static int wsvqa_read_packet(AVFormatContext *s,
switch (chunk_type) { switch (chunk_type) {
case SND1_TAG: case SND1_TAG:
/* unpacked size is stored in header */ /* unpacked size is stored in header */
pkt->duration = AV_RL16(pkt->data) / wsvqa->channels; if(pkt->data)
pkt->duration = AV_RL16(pkt->data) / wsvqa->channels;
break; break;
case SND2_TAG: case SND2_TAG:
/* 2 samples/byte, 1 or 2 samples per frame depending on stereo */ /* 2 samples/byte, 1 or 2 samples per frame depending on stereo */