From 6999980d671f70fdae19c8b4663efa5189f9ca6c Mon Sep 17 00:00:00 2001
From: Martin Storsjo <martin@martin.st>
Date: Sat, 11 Aug 2012 21:56:42 +0300
Subject: Use saturating adds to avoid overflow

When the addition overflowed, asserts were triggered later, where
the values were assumed to be non-negative.
---
 libSBRenc/src/env_est.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libSBRenc/src/env_est.cpp b/libSBRenc/src/env_est.cpp
index 9423f27..312e0ae 100644
--- a/libSBRenc/src/env_est.cpp
+++ b/libSBRenc/src/env_est.cpp
@@ -762,8 +762,8 @@ calculateSbrEnvelope (FIXP_DBL **RESTRICT YBufferLeft,  /*! energy buffer left *
       /* save energies */
       pNrgLeft[j]  = nrgLeft;
       pNrgRight[j] = nrgRight;
-      envNrgLeft  += nrgLeft;
-      envNrgRight += nrgRight;
+      envNrgLeft   = fAddSaturate(envNrgLeft, nrgLeft);
+      envNrgRight  = fAddSaturate(envNrgRight, nrgRight);
 
     } /* j */
 
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