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-rw-r--r--libFDK/src/mdct.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/libFDK/src/mdct.cpp b/libFDK/src/mdct.cpp
index 9a29aa1..9347a16 100644
--- a/libFDK/src/mdct.cpp
+++ b/libFDK/src/mdct.cpp
@@ -119,6 +119,9 @@ void imdct_gain(FIXP_DBL *pGain_m, int *pGain_e, int tl)
gain_e += -MDCT_OUTPUT_GAIN - log2_tl - MDCT_OUT_HEADROOM + 1;
+ FDK_ASSERT(log2_tl - 2 >= 0);
+ FDK_ASSERT(log2_tl - 2 < 8*sizeof(int));
+
/* Detect non-radix 2 transform length and add amplitude compensation factor
which cannot be included into the exponent above */
switch ( (tl) >> (log2_tl - 2) ) {