commit cd04484f4837b8ca0041d118286ab6a98e84fc75
author Andy Hung <hunga@google.com> Thu Aug 07 11:04:34 2014 -0700
committer Andy Hung <hunga@google.com> Mon Aug 11 10:17:18 2014 -0700
tree 4b9e501bb71969c0ca5049201aeae42284ac9b80
parent 53a1e46e559b00653eadf6f4bb5572679b0ee734

Extend downsampling ratios greater than 2:1

Also improve robustness to choice of sampling rate or buffer size
such that increasing either by 10x does not cause overflow.

Bug: 12979141
Bug: 15933066
Change-Id: If7989bd745d1bee3bdf811b8b7c978543ccafb65

services/audioflinger/AudioResamplerDyn.cpp

diff --git a/services/audioflinger/AudioResamplerDyn.cpp b/services/audioflinger/AudioResamplerDyn.cpp
index 159ab70..0eeb201 100644
--- a/services/audioflinger/AudioResamplerDyn.cpp
+++ b/services/audioflinger/AudioResamplerDyn.cpp
@@ -393,7 +393,7 @@
     mPhaseFraction = static_cast<unsigned long long>(mPhaseFraction)
             * phaseWrapLimit / oldPhaseWrapLimit;
     mPhaseFraction %= phaseWrapLimit; // should not do anything, but just in case.
-    mPhaseIncrement = static_cast<uint32_t>(static_cast<double>(phaseWrapLimit)
+    mPhaseIncrement = static_cast<uint32_t>(static_cast<uint64_t>(phaseWrapLimit)
             * inSampleRate / mSampleRate);
 
     // determine which resampler to use