diff -r 000000000000 -r 6474c204b198 dom/system/gonk/AudioManager.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/system/gonk/AudioManager.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,82 @@
+/* Copyright 2012 Mozilla Foundation and Mozilla contributors
+ *
+ * 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 mozilla_dom_system_b2g_audiomanager_h__
+#define mozilla_dom_system_b2g_audiomanager_h__
+
+#include "mozilla/Observer.h"
+#include "nsAutoPtr.h"
+#include "nsIAudioManager.h"
+#include "nsIObserver.h"
+#include "AudioChannelAgent.h"
+#include "android_audio/AudioSystem.h"
+
+// {b2b51423-502d-4d77-89b3-7786b562b084}
+#define NS_AUDIOMANAGER_CID {0x94f6fd70, 0x7615, 0x4af9, \
+      {0x89, 0x10, 0xf9, 0x3c, 0x55, 0xe6, 0x62, 0xec}}
+#define NS_AUDIOMANAGER_CONTRACTID "@mozilla.org/telephony/audiomanager;1"
+
+namespace mozilla {
+namespace hal {
+class SwitchEvent;
+typedef Observer<SwitchEvent> SwitchObserver;
+} // namespace hal
+
+namespace dom {
+namespace gonk {
+class RecoverTask;
+class AudioChannelVolInitCallback;
+class AudioManager : public nsIAudioManager
+                   , public nsIObserver
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIAUDIOMANAGER
+  NS_DECL_NSIOBSERVER
+
+  AudioManager();
+  ~AudioManager();
+
+  // When audio backend is dead, recovery task needs to read all volume
+  // settings then set back into audio backend.
+  friend class RecoverTask;
+  friend class AudioChannelVolInitCallback;
+
+protected:
+  int32_t mPhoneState;
+  int mCurrentStreamVolumeTbl[AUDIO_STREAM_CNT];
+
+  nsresult SetStreamVolumeIndex(int32_t aStream, int32_t aIndex);
+  nsresult GetStreamVolumeIndex(int32_t aStream, int32_t *aIndex);
+
+private:
+  nsAutoPtr<mozilla::hal::SwitchObserver> mObserver;
+  nsCOMPtr<nsIAudioChannelAgent>          mPhoneAudioAgent;
+#ifdef MOZ_B2G_RIL
+  bool                                    mMuteCallToRIL;
+  // mIsMicMuted is only used for toggling mute call to RIL.
+  bool                                    mIsMicMuted;
+#endif
+
+  void HandleBluetoothStatusChanged(nsISupports* aSubject,
+                                    const char* aTopic,
+                                    const nsCString aAddress);
+};
+
+} /* namespace gonk */
+} /* namespace dom */
+} /* namespace mozilla */
+
+#endif // mozilla_dom_system_b2g_audiomanager_h__