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aaccoder: prevent crash of anmr coder

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If minq is negative, the range of sf_idx can be larger than
SCALE_MAX_DIFF allows, causing assertion failures later in
encode_scale_factors.

Reviewed-by: Claudio Freire <klaussfreire@gmail.com>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
(cherry picked from commit 7a4652dd5da0502ff21c183b5ca7d76b1cfd6c51)
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
This commit is contained in:
Andreas Cadhalpun 2015-12-04 18:13:07 +01:00
parent 76af12f542
commit 507e0314c0
1 changed files with 1 additions and 1 deletions
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2
libavcodec/aaccoder.c
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@ -499,7 +499,7 @@ static void search_for_quantizers_anmr(AVCodecContext *avctx, AACEncContext *s,
} }
while (idx) { while (idx) {
sce->sf_idx[bandaddr[idx]] = minq + q0; sce->sf_idx[bandaddr[idx]] = minq + q0;
minq = paths[idx][minq].prev; minq = FFMAX(paths[idx][minq].prev, 0);
idx--; idx--;
} }
//set the same quantizers inside window groups //set the same quantizers inside window groups