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| author | Fraunhofer IIS FDK <audio-fdk@iis.fraunhofer.de> | 2021-05-07 20:43:17 +0000 |
|---|---|---|
| committer | Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> | 2021-05-07 20:43:17 +0000 |
| commit | f20e11ed28e9ab062a952f8d729c8d131375d1dd (patch) | |
| tree | dbb6b53ef3e9a97c4258ae96224fe281a3fe3104 | |
| parent | ba81285d2b00b5eb4a542f4f3d9b693fabb74d10 (diff) | |
| parent | 773ff1d3e8921ed2c9d2def344cf4b6b47f861c8 (diff) | |
| download | fdk-aac-f20e11ed28e9ab062a952f8d729c8d131375d1dd.tar.gz fdk-aac-f20e11ed28e9ab062a952f8d729c8d131375d1dd.tar.bz2 fdk-aac-f20e11ed28e9ab062a952f8d729c8d131375d1dd.zip | |
Adapt scaling in combineSignalCplxScale*() to prevent signed integer overflows. am: 773ff1d3e8
Original change: https://googleplex-android-review.googlesource.com/c/platform/external/aac/+/14470257
Change-Id: I568446484ac45601e15980652490e8cf9fc386eb
| -rw-r--r-- | libSACdec/src/sac_stp.cpp | 25 |
1 files changed, 10 insertions, 15 deletions
diff --git a/libSACdec/src/sac_stp.cpp b/libSACdec/src/sac_stp.cpp index be332c7..0e6affa 100644 --- a/libSACdec/src/sac_stp.cpp +++ b/libSACdec/src/sac_stp.cpp @@ -1,7 +1,7 @@ /* ----------------------------------------------------------------------------- Software License for The Fraunhofer FDK AAC Codec Library for Android -© Copyright 1995 - 2020 Fraunhofer-Gesellschaft zur Förderung der angewandten +© Copyright 1995 - 2021 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. All rights reserved. 1. INTRODUCTION @@ -229,15 +229,13 @@ inline void combineSignalCplxScale1(FIXP_DBL *hybOutputRealDry, int n; FIXP_DBL scaleY; for (n = bands - 1; n >= 0; n--) { - scaleY = fMultDiv2(scaleX, *pBP); + scaleY = fMult(scaleX, *pBP); *hybOutputRealDry = SATURATE_LEFT_SHIFT( - (*hybOutputRealDry >> 1) + - (fMultDiv2(*hybOutputRealWet, scaleY) << (SF_SCALE + 1)), - 1, DFRACT_BITS); + (*hybOutputRealDry >> SF_SCALE) + fMult(*hybOutputRealWet, scaleY), + SF_SCALE, DFRACT_BITS); *hybOutputImagDry = SATURATE_LEFT_SHIFT( - (*hybOutputImagDry >> 1) + - (fMultDiv2(*hybOutputImagWet, scaleY) << (SF_SCALE + 1)), - 1, DFRACT_BITS); + (*hybOutputImagDry >> SF_SCALE) + fMult(*hybOutputImagWet, scaleY), + SF_SCALE, DFRACT_BITS); hybOutputRealDry++, hybOutputRealWet++; hybOutputImagDry++, hybOutputImagWet++; pBP++; @@ -253,14 +251,11 @@ inline void combineSignalCplxScale2(FIXP_DBL *hybOutputRealDry, for (n = bands - 1; n >= 0; n--) { *hybOutputRealDry = SATURATE_LEFT_SHIFT( - (*hybOutputRealDry >> 1) + - (fMultDiv2(*hybOutputRealWet, scaleX) << SF_SCALE), - 1, DFRACT_BITS); + (*hybOutputRealDry >> SF_SCALE) + fMult(*hybOutputRealWet, scaleX), + SF_SCALE, DFRACT_BITS); *hybOutputImagDry = SATURATE_LEFT_SHIFT( - (*hybOutputImagDry >> 1) + - (fMultDiv2(*hybOutputImagWet, scaleX) << SF_SCALE), - 1, DFRACT_BITS); - ; + (*hybOutputImagDry >> SF_SCALE) + fMult(*hybOutputImagWet, scaleX), + SF_SCALE, DFRACT_BITS); hybOutputRealDry++, hybOutputRealWet++; hybOutputImagDry++, hybOutputImagWet++; } |