fenix/fdk-aac
1
0
Fork 0
mirror of https://github.com/mstorsjo/fdk-aac.git synced 2025-06-05 22:39:13 +02:00
Code Issues Projects Releases Wiki Activity

Use SATURATE_LEFT_SHIFT in get_lsppol() to prevent integer overflow.

Browse Source 
Bug: 131430997
Test: atest DecoderTestXheAac ; atest DecoderTestAacDrc
Change-Id: Ie9ec52485a52b076a900b111b035289110c004f8
This commit is contained in:
Fraunhofer IIS FDK
2019-09-20 14:01:32 +02:00
committed by Jean-Michel Trivi
parent 4c839c6a90
commit 2d292e9b2d
1 changed files with 6 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
libAACdec/src/usacdec_lpc.cpp
View File

@@ -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
@@ -1138,9 +1138,12 @@ static void get_lsppol(FIXP_LPC lsp[], FIXP_DBL f[], int n, int flag) {
for (i = 2; i <= n; i++) {
plsp += 2;
b = -FX_LPC2FX_DBL(*plsp);
f[i] = ((fMultDiv2(b, f[i - 1]) << 1) + (f[i - 2])) << 1;
f[i] = SATURATE_LEFT_SHIFT((fMultDiv2(b, f[i - 1]) + (f[i - 2] >> 1)), 2,
DFRACT_BITS);
for (j = i - 1; j > 1; j--) {
f[j] = f[j] + (fMultDiv2(b, f[j - 1]) << 2) + f[j - 2];
f[j] = SATURATE_LEFT_SHIFT(
((f[j] >> 2) + fMultDiv2(b, f[j - 1]) + (f[j - 2] >> 2)), 2,
DFRACT_BITS);
}
f[1] = f[1] + (b >> (SF_F - 1));
}