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imc: Catch a division by zero
[ffmpeg.git]
/
libavcodec
/
imc.c
diff --git
a/libavcodec/imc.c
b/libavcodec/imc.c
index
2749099
..
e3f5e15
100644
(file)
--- a/
libavcodec/imc.c
+++ b/
libavcodec/imc.c
@@
-449,6
+449,10
@@
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;