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Merge "Avoid signed integer overflow in combineSignalCplxScale2()." into sc-dev

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TreeHugger Robot 2021-04-30 23:52:10 +00:00 committed by Android (Google) Code Review
commit ab332a940d
1 changed files with 9 additions and 6 deletions
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15
libSACdec/src/sac_stp.cpp
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@ -252,12 +252,15 @@ inline void combineSignalCplxScale2(FIXP_DBL *hybOutputRealDry,
int n;
for (n = bands - 1; n >= 0; n--) {
*hybOutputRealDry =
*hybOutputRealDry +
(fMultDiv2(*hybOutputRealWet, scaleX) << (SF_SCALE + 1));
*hybOutputImagDry =
*hybOutputImagDry +
(fMultDiv2(*hybOutputImagWet, scaleX) << (SF_SCALE + 1));
*hybOutputRealDry = SATURATE_LEFT_SHIFT(
(*hybOutputRealDry >> 1) +
(fMultDiv2(*hybOutputRealWet, scaleX) << SF_SCALE),
1, DFRACT_BITS);
*hybOutputImagDry = SATURATE_LEFT_SHIFT(
(*hybOutputImagDry >> 1) +
(fMultDiv2(*hybOutputImagWet, scaleX) << SF_SCALE),
1, DFRACT_BITS);
;
hybOutputRealDry++, hybOutputRealWet++;
hybOutputImagDry++, hybOutputImagWet++;
}