Module: libav
Branch: release/9
Commit: 6d2a92c4678616fe342be0b606343ae3ade83641
Author: Luca Barbato <lu_z...@gentoo.org>
Committer: Luca Barbato <lu_z...@gentoo.org>
Date: Tue Jul 9 09:18:16 2013 +0200
imc: Catch a division by zero
Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-sta...@libav.org
(cherry picked from commit bbf6a4aa20bfe3d7869b2218e66063602dfb8aa7)
Signed-off-by: Luca Barbato <lu_z...@gentoo.org>
---
libavcodec/imc.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/libavcodec/imc.c b/libavcodec/imc.c
index 5cff70f..316dd77 100644
--- a/libavcodec/imc.c
+++ b/libavcodec/imc.c
@@ -450,6 +450,10 @@ static int bit_allocation(IMCContext *q, IMCChannel *chctx,
iacc += chctx->bandWidthT[i];
summa += chctx->bandWidthT[i] * chctx->flcoeffs4[i];
}
+
+ if (!iacc)
+ return AVERROR_INVALIDDATA;
+
chctx->bandWidthT[BANDS - 1] = 0;
summa = (summa * 0.5 - freebits) / iacc;
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