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Fix fixmadddiv2_DD() integer overflow in SpatialDecApplyM2_Mode212_ResidualsPlusPhaseCoding(). am: 85a3977fdf 

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/aac/+/14470256

Change-Id: Ib5c4f6c2e9e177b9c4498f6f62c94d89d835629a
This commit is contained in:
Fraunhofer IIS FDK 2021-05-07 20:43:10 +00:00 committed by Automerger Merge Worker
parent 03416e01c7 85a3977fdf
commit ba81285d2b
1 changed files with 9 additions and 11 deletions
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20
libSACdec/src/sac_process.cpp
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@ -1,7 +1,7 @@
/* -----------------------------------------------------------------------------
Software License for The Fraunhofer FDK AAC Codec Library for Android
© Copyright 1995 - 2019 Fraunhofer-Gesellschaft zur Förderung der angewandten
© Copyright 1995 - 2021 Fraunhofer-Gesellschaft zur Förderung der angewandten
Forschung e.V. All rights reserved.
1. INTRODUCTION
@ -517,12 +517,11 @@ SACDEC_ERROR SpatialDecApplyM2_Mode212_ResidualsPlusPhaseCoding(
maxVal = fAbs(iReal0) | fAbs(iImag0);
maxVal |= fAbs(iReal1);
s = fMax(CntLeadingZeros(maxVal) - 1, 0);
s = fMin(s, scale_param_m2);
s = fMin(CntLeadingZeros(maxVal) - 2, scale_param_m2);
mReal0 = iReal0 << s;
mImag0 = iImag0 << s;
mReal1 = iReal1 << s;
mReal0 = scaleValue(iReal0, s);
mImag0 = scaleValue(iImag0, s);
mReal1 = scaleValue(iReal1, s);
s = scale_param_m2 - s;
@ -562,12 +561,11 @@ SACDEC_ERROR SpatialDecApplyM2_Mode212_ResidualsPlusPhaseCoding(
maxVal = fAbs(iReal0) | fAbs(iImag0);
maxVal |= fAbs(iReal1);
s = fMax(CntLeadingZeros(maxVal) - 1, 0);
s = fMin(s, scale_param_m2);
s = fMin(CntLeadingZeros(maxVal) - 2, scale_param_m2);
mReal0 = FX_DBL2FX_SGL(iReal0 << s);
mImag0 = FX_DBL2FX_SGL(iImag0 << s);
mReal1 = FX_DBL2FX_SGL(iReal1 << s);
mReal0 = FX_DBL2FX_SGL(scaleValue(iReal0, s));
mImag0 = FX_DBL2FX_SGL(scaleValue(iImag0, s));
mReal1 = FX_DBL2FX_SGL(scaleValue(iReal1, s));
s = scale_param_m2 - s;