auto import from //depot/cupcake/@135843
diff --git a/include/media/IAudioTrack.h b/include/media/IAudioTrack.h
new file mode 100644
index 0000000..12f2111
--- /dev/null
+++ b/include/media/IAudioTrack.h
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2007 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.
+ */
+
+#ifndef ANDROID_IAUDIOTRACK_H
+#define ANDROID_IAUDIOTRACK_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/RefBase.h>
+#include <utils/Errors.h>
+#include <utils/IInterface.h>
+#include <utils/IMemory.h>
+
+
+namespace android {
+
+// ----------------------------------------------------------------------------
+
+class IAudioTrack : public IInterface
+{
+public:
+ DECLARE_META_INTERFACE(AudioTrack);
+
+ /* After it's created the track is not active. Call start() to
+ * make it active. If set, the callback will start being called.
+ */
+ virtual status_t start() = 0;
+
+ /* Stop a track. If set, the callback will cease being called and
+ * obtainBuffer will return an error. Buffers that are already released
+ * will be processed, unless flush() is called.
+ */
+ virtual void stop() = 0;
+
+ /* flush a stopped track. All pending buffers are discarded.
+ * This function has no effect if the track is not stoped.
+ */
+ virtual void flush() = 0;
+
+ /* mute or unmutes this track.
+ * While mutted, the callback, if set, is still called.
+ */
+ virtual void mute(bool) = 0;
+
+ /* Pause a track. If set, the callback will cease being called and
+ * obtainBuffer will return an error. Buffers that are already released
+ * will be processed, unless flush() is called.
+ */
+ virtual void pause() = 0;
+
+ /* get this tracks control block */
+ virtual sp<IMemory> getCblk() const = 0;
+};
+
+// ----------------------------------------------------------------------------
+
+class BnAudioTrack : public BnInterface<IAudioTrack>
+{
+public:
+ virtual status_t onTransact( uint32_t code,
+ const Parcel& data,
+ Parcel* reply,
+ uint32_t flags = 0);
+};
+
+// ----------------------------------------------------------------------------
+
+}; // namespace android
+
+#endif // ANDROID_IAUDIOTRACK_H