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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>
(cherry picked from commit c77d409bf95954aceb762dd800d1ee2868c4b0d4)
(cherry picked from commit 9b9aee27f4e43b4a6b0884f8a6f49eb0289d7c09)
This commit is contained in:
Martin Storsjö 2013-09-17 19:33:48 +03:00 committed by Luca Barbato
parent e972338e35
commit 591d5281f5
1 changed files with 4 additions and 0 deletions
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4
libavcodec/twinvq.c
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@ -1137,6 +1137,10 @@ static av_cold int twin_decode_init(AVCodecContext *avctx)
return -1;
}
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: tctx->mtab = &mode_08_08; break;