commit 1d26ddf715182d6082804ff70086c47fb8c354b8
author Andy Hung <hunga@google.com> Thu May 29 15:53:09 2014 -0700
committer Andy Hung <hunga@google.com> Thu May 29 15:56:33 2014 -0700
tree 83c47b23e1ba0cd3180d5845746c83c6fba3c037
parent 798ce934571bc7eb5715bf1c03cbe5436a1220e3

Avoid resetting BufferProviders in mixer unnecessarily

Change-Id: Iad85c4dfd21be1dbf89dc11906106b34219376f8

services/audioflinger/AudioMixer.cpp

diff --git a/services/audioflinger/AudioMixer.cpp b/services/audioflinger/AudioMixer.cpp
index 8d57451..ace3bf1 100644
--- a/services/audioflinger/AudioMixer.cpp
+++ b/services/audioflinger/AudioMixer.cpp
@@ -750,6 +750,9 @@
     name -= TRACK0;
     ALOG_ASSERT(uint32_t(name) < MAX_NUM_TRACKS, "bad track name %d", name);
 
+    if (mState.tracks[name].mInputBufferProvider == bufferProvider) {
+        return; // don't reset any buffer providers if identical.
+    }
     if (mState.tracks[name].mReformatBufferProvider != NULL) {
         mState.tracks[name].mReformatBufferProvider->reset();
     } else if (mState.tracks[name].downmixerBufferProvider != NULL) {