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-rw-r--r--libDRCdec/src/drcGainDec_preprocess.cpp5
1 files changed, 3 insertions, 2 deletions
diff --git a/libDRCdec/src/drcGainDec_preprocess.cpp b/libDRCdec/src/drcGainDec_preprocess.cpp
index 7919589..c543c53 100644
--- a/libDRCdec/src/drcGainDec_preprocess.cpp
+++ b/libDRCdec/src/drcGainDec_preprocess.cpp
@@ -300,8 +300,9 @@ static DRC_ERROR _compressorIO_sigmoid(const CUSTOM_DRC_CHAR_SIGMOID* pCChar,
FIXP_SGL exp = pCChar->exp;
DRC_ERROR err = DE_OK;
- tmp = fMultDiv2(DRC_INPUT_LOUDNESS_TARGET - inLevelDb, pCChar->ioRatio);
- tmp = SATURATE_LEFT_SHIFT(tmp, 2 + 1, DFRACT_BITS);
+ tmp = fMultDiv2((DRC_INPUT_LOUDNESS_TARGET >> 1) - (inLevelDb >> 1),
+ pCChar->ioRatio);
+ tmp = SATURATE_LEFT_SHIFT(tmp, 2 + 1 + 1, DFRACT_BITS);
if (exp < (FIXP_SGL)MAXVAL_SGL) {
/* x = tmp / gainDbLimit; */
/* *outGainDb = tmp / pow(1.0f + pow(x, exp), 1.0f/exp); */