Refactor audio manager for Android to avoid heavy tasks at startup

media/audio/android/audio_manager_android.h

Index: media/audio/android/audio_manager_android.h
diff --git a/media/audio/android/audio_manager_android.h b/media/audio/android/audio_manager_android.h
index d9744ff0999f54fe20ca62db94459aecdc7a70fb..61237b3380b95a748cd638b1fae3e7bc41931178 100644
--- a/media/audio/android/audio_manager_android.h
+++ b/media/audio/android/audio_manager_android.h
@@ -67,10 +67,12 @@ class MEDIA_EXPORT AudioManagerAndroid : public AudioManagerBase {
       const AudioParameters& input_params) OVERRIDE;
 
  private:
+  bool IsFirstCreatedAudioStream();

[tommi (sloooow) - chröme, 2013/12/10 21:19:11]

HasOneAudioStream?
(IsFirstXxx sounds like it would need a stream argument to check if that stream
is the first one)

[henrika (OOO until Aug 14), 2013/12/11 13:16:38]

Removed.

+  bool IsLastDestroyedAudioStream();

[tommi (sloooow) - chröme, 2013/12/10 21:19:11]

It's not clear how this is different from the function above, so would be good
to have some documentation.
Also, do you need to clarify whether it's an input or output stream?

[henrika (OOO until Aug 14), 2013/12/11 13:16:38]

Renamed.

Regarding input & output. The old solution (before I did any work) only set the
audio mode to comm mode when out stream was created, hence no mode shift if only
capture was active. It feels wrong so my idea was to maintain the mode as long
as any stream needs it.

[tommi (sloooow) - chröme, 2013/12/11 17:25:05]

sgtm

   void Init();
   void Close();
-  void SetAudioMode(int mode);
-  void SetAudioDevice(const std::string& device_id);
+  void SetCommunicationAudioModeOn(bool on);
+  bool SetAudioDevice(const std::string& device_id);
   int GetNativeOutputSampleRate();
   bool IsAudioLowLatencySupported();
   int GetAudioLowLatencyOutputFrameSize();