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twinvqdec: Check the ibps parameter separately

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This is required, since invalid parameters actually could
pass the switch check below.

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 2013-09-17 19:33:48 +03:00
parent 8583b14252
commit c77d409bf9
1 changed files with 4 additions and 0 deletions
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4
libavcodec/twinvqdec.c
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@ -356,6 +356,10 @@ static av_cold int twinvq_decode_init(AVCodecContext *avctx)
: AV_CH_LAYOUT_STEREO;
ibps = avctx->bit_rate / (1000 * avctx->channels);
if (ibps < 8 || ibps > 48) {
av_log(avctx, AV_LOG_ERROR, "Bad bitrate per channel value %d\n", ibps);
return AVERROR_INVALIDDATA;
}
switch ((isampf << 8) + ibps) {
case (8 << 8) + 8: