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Prevent integer overflows in dualChannelFiltering() and eightChannelFiltering(). 

Bug: 176246647
Test: atest DecoderTestXheAac DecoderTestAacDrc
Change-Id: Ic9217bbb3980807036ae6ae121e6ddb7cc1bce35
This commit is contained in:
Fraunhofer IIS FDK 2020-04-09 17:50:10 +02:00 committed by Ray Essick
parent f89d1d0a4e
commit 614b9f005a
1 changed files with 13 additions and 13 deletions
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26
libFDK/src/FDK_hybrid.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 - 2020 Fraunhofer-Gesellschaft zur Förderung der angewandten
Forschung e.V. All rights reserved.
1. INTRODUCTION
@ -539,11 +539,11 @@ static void dualChannelFiltering(const FIXP_DBL *const pQmfReal,
i6 = pQmfImag[pReadIdx[6]] >> 2;
FDK_ASSERT((invert == 0) || (invert == 1));
mHybridReal[0 + invert] = (r6 + r1) << 1;
mHybridImag[0 + invert] = (i6 + i1) << 1;
mHybridReal[0 + invert] = SATURATE_LEFT_SHIFT((r6 + r1), 1, DFRACT_BITS);
mHybridImag[0 + invert] = SATURATE_LEFT_SHIFT((i6 + i1), 1, DFRACT_BITS);
mHybridReal[1 - invert] = (r6 - r1) << 1;
mHybridImag[1 - invert] = (i6 - i1) << 1;
mHybridReal[1 - invert] = SATURATE_LEFT_SHIFT((r6 - r1), 1, DFRACT_BITS);
mHybridImag[1 - invert] = SATURATE_LEFT_SHIFT((i6 - i1), 1, DFRACT_BITS);
}
static void fourChannelFiltering(const FIXP_DBL *const pQmfReal,
@ -766,15 +766,15 @@ static void eightChannelFiltering(const FIXP_DBL *const pQmfReal,
mHybridReal[3] = pfft[FFT_IDX_R(1)] << sc;
mHybridImag[3] = pfft[FFT_IDX_I(1)] << sc;
mHybridReal[4] = pfft[FFT_IDX_R(2)] << sc;
mHybridReal[4] += pfft[FFT_IDX_R(5)] << sc;
mHybridImag[4] = pfft[FFT_IDX_I(2)] << sc;
mHybridImag[4] += pfft[FFT_IDX_I(5)] << sc;
mHybridReal[4] = SATURATE_LEFT_SHIFT(
(pfft[FFT_IDX_R(2)] + pfft[FFT_IDX_R(5)]), sc, DFRACT_BITS);
mHybridImag[4] = SATURATE_LEFT_SHIFT(
(pfft[FFT_IDX_I(2)] + pfft[FFT_IDX_I(5)]), sc, DFRACT_BITS);
mHybridReal[5] = pfft[FFT_IDX_R(3)] << sc;
mHybridReal[5] += pfft[FFT_IDX_R(4)] << sc;
mHybridImag[5] = pfft[FFT_IDX_I(3)] << sc;
mHybridImag[5] += pfft[FFT_IDX_I(4)] << sc;
mHybridReal[5] = SATURATE_LEFT_SHIFT(
(pfft[FFT_IDX_R(3)] + pfft[FFT_IDX_R(4)]), sc, DFRACT_BITS);
mHybridImag[5] = SATURATE_LEFT_SHIFT(
(pfft[FFT_IDX_I(3)] + pfft[FFT_IDX_I(4)]), sc, DFRACT_BITS);
} else {
for (k = 0; k < 8; k++) {
mHybridReal[k] = pfft[FFT_IDX_R(k)] << sc;