From 691d00e6fa72b9cea30782c4cf93c8e3013ed5ed Mon Sep 17 00:00:00 2001 From: Fraunhofer IIS FDK Date: Thu, 20 Dec 2018 15:52:46 +0100 Subject: [PATCH] Integer overflow fix in _compressorIO_sigmoid() Test: atest DecoderTestXheAac ; atest DecoderTestAacDrc Change-Id: I3b7c72a85fc735469cc785ca5aa0545485b91532 --- libDRCdec/src/drcGainDec_preprocess.cpp | 5 +++-- 1 file 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); */