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Revise scaling in extractBBEnv() to avoid potential signed integer overflows. 

Bug: 146936823
Test: atest DecoderTestXheAac ; atest DecoderTestAacDrc
Change-Id: I268f4ed2778ffad6cbd90e1df627daf2eab97604
This commit is contained in:
Fraunhofer IIS FDK 2019-11-13 16:06:43 +01:00 committed by Jean-Michel Trivi
parent ed5a207a1f
commit 3070b0e81b
1 changed files with 68 additions and 106 deletions
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160
libSACdec/src/sac_reshapeBBEnv.cpp
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@ -1,7 +1,7 @@
/* -----------------------------------------------------------------------------
Software License for The Fraunhofer FDK AAC Codec Library for Android
© Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
© Copyright 1995 - 2019 Fraunhofer-Gesellschaft zur Förderung der angewandten
Forschung e.V. All rights reserved.
1. INTRODUCTION
@ -162,75 +162,59 @@ static inline void getSlotNrgHQ(FIXP_DBL *RESTRICT pReal,
FIXP_DBL nrg;
/* qs = 12, 13, 14 */
slotNrg[0] = ((fPow2Div2((*pReal++) << maxValSF) +
fPow2Div2((*pImag++) << maxValSF)) >>
(SF_FACTOR_SLOT - 1));
slotNrg[1] = ((fPow2Div2((*pReal++) << maxValSF) +
fPow2Div2((*pImag++) << maxValSF)) >>
(SF_FACTOR_SLOT - 1));
slotNrg[2] = ((fPow2Div2((*pReal++) << maxValSF) +
fPow2Div2((*pImag++) << maxValSF)) >>
(SF_FACTOR_SLOT - 1));
slotNrg[0] = ((fPow2Div2((*pReal++) << maxValSF) >> (SF_FACTOR_SLOT - 1)) +
(fPow2Div2((*pImag++) << maxValSF) >> (SF_FACTOR_SLOT - 1)));
slotNrg[1] = ((fPow2Div2((*pReal++) << maxValSF) >> (SF_FACTOR_SLOT - 1)) +
(fPow2Div2((*pImag++) << maxValSF) >> (SF_FACTOR_SLOT - 1)));
slotNrg[2] = ((fPow2Div2((*pReal++) << maxValSF) >> (SF_FACTOR_SLOT - 1)) +
(fPow2Div2((*pImag++) << maxValSF) >> (SF_FACTOR_SLOT - 1)));
/* qs = 15 */
slotNrg[3] = ((fPow2Div2((*pReal++) << maxValSF) +
fPow2Div2((*pImag++) << maxValSF)) >>
(SF_FACTOR_SLOT - 1));
slotNrg[3] = ((fPow2Div2((*pReal++) << maxValSF) >> (SF_FACTOR_SLOT - 1)) +
(fPow2Div2((*pImag++) << maxValSF) >> (SF_FACTOR_SLOT - 1)));
/* qs = 16, 17 */
nrg = ((fPow2Div2((*pReal++) << maxValSF) +
fPow2Div2((*pImag++) << maxValSF)) >>
(SF_FACTOR_SLOT - 1));
slotNrg[4] = nrg + ((fPow2Div2((*pReal++) << maxValSF) +
fPow2Div2((*pImag++) << maxValSF)) >>
(SF_FACTOR_SLOT - 1));
nrg = ((fPow2Div2((*pReal++) << maxValSF) >> (SF_FACTOR_SLOT - 1)) +
(fPow2Div2((*pImag++) << maxValSF) >> (SF_FACTOR_SLOT - 1)));
slotNrg[4] =
nrg + ((fPow2Div2((*pReal++) << maxValSF) >> (SF_FACTOR_SLOT - 1)) +
(fPow2Div2((*pImag++) << maxValSF) >> (SF_FACTOR_SLOT - 1)));
/* qs = 18, 19, 20 */
nrg = ((fPow2Div2((*pReal++) << maxValSF) +
fPow2Div2((*pImag++) << maxValSF)) >>
(SF_FACTOR_SLOT - 1));
nrg += ((fPow2Div2((*pReal++) << maxValSF) +
fPow2Div2((*pImag++) << maxValSF)) >>
(SF_FACTOR_SLOT - 1));
slotNrg[5] = nrg + ((fPow2Div2((*pReal++) << maxValSF) +
fPow2Div2((*pImag++) << maxValSF)) >>
(SF_FACTOR_SLOT - 1));
nrg = ((fPow2Div2((*pReal++) << maxValSF) >> (SF_FACTOR_SLOT - 1)) +
(fPow2Div2((*pImag++) << maxValSF) >> (SF_FACTOR_SLOT - 1)));
nrg += ((fPow2Div2((*pReal++) << maxValSF) >> (SF_FACTOR_SLOT - 1)) +
(fPow2Div2((*pImag++) << maxValSF) >> (SF_FACTOR_SLOT - 1)));
slotNrg[5] =
nrg + ((fPow2Div2((*pReal++) << maxValSF) >> (SF_FACTOR_SLOT - 1)) +
(fPow2Div2((*pImag++) << maxValSF) >> (SF_FACTOR_SLOT - 1)));
/* qs = 21, 22 */
nrg = ((fPow2Div2((*pReal++) << maxValSF) +
fPow2Div2((*pImag++) << maxValSF)) >>
(SF_FACTOR_SLOT - 1));
slotNrg[6] = nrg + ((fPow2Div2((*pReal++) << maxValSF) +
fPow2Div2((*pImag++) << maxValSF)) >>
(SF_FACTOR_SLOT - 1));
nrg = ((fPow2Div2((*pReal++) << maxValSF) >> (SF_FACTOR_SLOT - 1)) +
(fPow2Div2((*pImag++) << maxValSF) >> (SF_FACTOR_SLOT - 1)));
slotNrg[6] =
nrg + ((fPow2Div2((*pReal++) << maxValSF) >> (SF_FACTOR_SLOT - 1)) +
(fPow2Div2((*pImag++) << maxValSF) >> (SF_FACTOR_SLOT - 1)));
/* qs = 23, 24 */
if (hybBands > 23) {
slotNrg[6] += ((fPow2Div2((*pReal++) << maxValSF) +
fPow2Div2((*pImag++) << maxValSF)) >>
(SF_FACTOR_SLOT - 1));
slotNrg[6] += ((fPow2Div2((*pReal++) << maxValSF) +
fPow2Div2((*pImag++) << maxValSF)) >>
(SF_FACTOR_SLOT - 1));
slotNrg[6] += ((fPow2Div2((*pReal++) << maxValSF) >> (SF_FACTOR_SLOT - 1)) +
(fPow2Div2((*pImag++) << maxValSF) >> (SF_FACTOR_SLOT - 1)));
slotNrg[6] += ((fPow2Div2((*pReal++) << maxValSF) >> (SF_FACTOR_SLOT - 1)) +
(fPow2Div2((*pImag++) << maxValSF) >> (SF_FACTOR_SLOT - 1)));
/* qs = 25, 26, 29, 28, 29 */
nrg = ((fPow2Div2((*pReal++) << maxValSF) +
fPow2Div2((*pImag++) << maxValSF)) >>
(SF_FACTOR_SLOT - 1));
nrg += ((fPow2Div2((*pReal++) << maxValSF) +
fPow2Div2((*pImag++) << maxValSF)) >>
(SF_FACTOR_SLOT - 1));
nrg += ((fPow2Div2((*pReal++) << maxValSF) +
fPow2Div2((*pImag++) << maxValSF)) >>
(SF_FACTOR_SLOT - 1));
nrg += ((fPow2Div2((*pReal++) << maxValSF) +
fPow2Div2((*pImag++) << maxValSF)) >>
(SF_FACTOR_SLOT - 1));
slotNrg[7] = nrg + ((fPow2Div2((*pReal++) << maxValSF) +
fPow2Div2((*pImag++) << maxValSF)) >>
(SF_FACTOR_SLOT - 1));
nrg = ((fPow2Div2((*pReal++) << maxValSF) >> (SF_FACTOR_SLOT - 1)) +
(fPow2Div2((*pImag++) << maxValSF) >> (SF_FACTOR_SLOT - 1)));
nrg += ((fPow2Div2((*pReal++) << maxValSF) >> (SF_FACTOR_SLOT - 1)) +
(fPow2Div2((*pImag++) << maxValSF) >> (SF_FACTOR_SLOT - 1)));
nrg += ((fPow2Div2((*pReal++) << maxValSF) >> (SF_FACTOR_SLOT - 1)) +
(fPow2Div2((*pImag++) << maxValSF) >> (SF_FACTOR_SLOT - 1)));
nrg += ((fPow2Div2((*pReal++) << maxValSF) >> (SF_FACTOR_SLOT - 1)) +
(fPow2Div2((*pImag++) << maxValSF) >> (SF_FACTOR_SLOT - 1)));
slotNrg[7] =
nrg + ((fPow2Div2((*pReal++) << maxValSF) >> (SF_FACTOR_SLOT - 1)) +
(fPow2Div2((*pImag++) << maxValSF) >> (SF_FACTOR_SLOT - 1)));
/* qs = 30 ... min(41,hybBands-1) */
nrg = ((fPow2Div2((*pReal++) << maxValSF) +
fPow2Div2((*pImag++) << maxValSF)) >>
(SF_FACTOR_SLOT - 1));
nrg = ((fPow2Div2((*pReal++) << maxValSF) >> (SF_FACTOR_SLOT - 1)) +
(fPow2Div2((*pImag++) << maxValSF) >> (SF_FACTOR_SLOT - 1)));
for (qs = 31; qs < hybBands; qs++) {
nrg += ((fPow2Div2((*pReal++) << maxValSF) +
fPow2Div2((*pImag++) << maxValSF)) >>
(SF_FACTOR_SLOT - 1));
nrg += ((fPow2Div2((*pReal++) << maxValSF) >> (SF_FACTOR_SLOT - 1)) +
(fPow2Div2((*pImag++) << maxValSF) >> (SF_FACTOR_SLOT - 1)));
}
slotNrg[8] = nrg;
} else {
@ -239,49 +223,22 @@ static inline void getSlotNrgHQ(FIXP_DBL *RESTRICT pReal,
}
}
static inline INT getMaxValDmx(FIXP_DBL *RESTRICT pReal,
FIXP_DBL *RESTRICT pImag, INT cplxBands,
INT hybBands) {
INT qs, clz;
FIXP_DBL maxVal = FL2FXCONST_DBL(0.0f);
for (qs = 12; qs < cplxBands; qs++) {
maxVal |= fAbs(pReal[qs]);
maxVal |= fAbs(pImag[qs]);
}
for (; qs < hybBands; qs++) {
maxVal |= fAbs(pReal[qs]);
}
clz = fixMax(0, CntLeadingZeros(maxVal) - 1);
return (clz);
}
static inline INT getMaxValDryWet(FIXP_DBL *RESTRICT pReal,
static inline void combineDryWet(FIXP_DBL *RESTRICT pReal,
FIXP_DBL *RESTRICT pImag,
FIXP_DBL *RESTRICT pHybOutputRealDry,
FIXP_DBL *RESTRICT pHybOutputImagDry,
FIXP_DBL *RESTRICT pHybOutputRealWet,
FIXP_DBL *RESTRICT pHybOutputImagWet,
INT cplxBands, INT hybBands) {
INT qs, clz;
FIXP_DBL maxVal = FL2FXCONST_DBL(0.0f);
INT qs;
for (qs = 12; qs < cplxBands; qs++) {
pReal[qs] = pHybOutputRealDry[qs] + pHybOutputRealWet[qs];
maxVal |= fAbs(pReal[qs]);
pImag[qs] = pHybOutputImagDry[qs] + pHybOutputImagWet[qs];
maxVal |= fAbs(pImag[qs]);
pReal[qs] = (pHybOutputRealDry[qs] >> 1) + (pHybOutputRealWet[qs] >> 1);
pImag[qs] = (pHybOutputImagDry[qs] >> 1) + (pHybOutputImagWet[qs] >> 1);
}
for (; qs < hybBands; qs++) {
pReal[qs] = pHybOutputRealDry[qs] + pHybOutputRealWet[qs];
maxVal |= fAbs(pReal[qs]);
pReal[qs] = (pHybOutputRealDry[qs] >> 1) + (pHybOutputRealWet[qs] >> 1);
}
clz = fixMax(0, CntLeadingZeros(maxVal) - 1);
return (clz);
}
static inline void slotAmp(FIXP_DBL *RESTRICT slotAmp_dry,
@ -386,15 +343,18 @@ static void extractBBEnv(spatialDec *self, INT inp, INT start, INT channels,
prevChOffs = ch;
pReal = pScratchBuffer;
pImag = pScratchBuffer + 42;
clz = getMaxValDryWet(
pReal, pImag, self->hybOutputRealDry__FDK[ch],
self->hybOutputImagDry__FDK[ch], self->hybOutputRealWet__FDK[ch],
combineDryWet(pReal, pImag, self->hybOutputRealDry__FDK[ch],
self->hybOutputImagDry__FDK[ch],
self->hybOutputRealWet__FDK[ch],
self->hybOutputImagWet__FDK[ch], cplxBands, hybBands);
clz = fMin(getScalefactor(&pReal[12], fMax(0, hybBands - 12)),
getScalefactor(&pImag[12], fMax(0, cplxBands - 12)));
} else {
prevChOffs = ch + self->numOutputChannels;
pReal = self->hybInputReal__FDK[ch];
pImag = self->hybInputImag__FDK[ch];
clz = getMaxValDmx(pReal, pImag, cplxBands, hybBands);
clz = fMin(getScalefactor(&pReal[12], fMax(0, hybBands - 12)),
getScalefactor(&pImag[12], fMax(0, cplxBands - 12)));
}
partNrg = partNrgPrev = pBBEnvState->partNrgPrev__FDK[prevChOffs];
@ -411,8 +371,10 @@ static void extractBBEnv(spatialDec *self, INT inp, INT start, INT channels,
SF_FACTOR_SLOT */
}
slotNrgSF = 2 * (staticScale - clz) + SF_FACTOR_SLOT;
frameNrgSF = 2 * (staticScale - clz) + SF_FACTOR_SLOT;
slotNrgSF = 2 * (staticScale - clz + ((inp == INP_DRY_WET) ? 1 : 0)) +
SF_FACTOR_SLOT;
frameNrgSF = 2 * (staticScale - clz + ((inp == INP_DRY_WET) ? 1 : 0)) +
SF_FACTOR_SLOT;
partNrgSF = fixMax(slotNrgSF - SF_ALPHA1 + 1,
pPartNrgPrevSF[0] - pPartNrgPrev2SF[0] + 1);