diff --git a/services/audioflinger/FastMixerState.cpp b/services/audioflinger/FastMixerState.cpp
new file mode 100644
index 0000000..4eacacf
--- /dev/null
+++ b/services/audioflinger/FastMixerState.cpp
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "FastMixerState.h"
+
+namespace android {
+
+FastTrack::FastTrack() :
+    mBufferProvider(NULL), mVolumeProvider(NULL), mGeneration(0)
+{
+}
+
+FastTrack::~FastTrack()
+{
+}
+
+FastMixerState::FastMixerState() :
+    mFastTracksGen(0), mTrackMask(0), mOutputSink(NULL), mOutputSinkGen(0),
+    mFrameCount(0), mCommand(INITIAL), mColdFutexAddr(NULL), mColdGen(0), mDumpState(NULL)
+{
+}
+
+FastMixerState::~FastMixerState()
+{
+}
+
+}   // namespace android