Moving SwitchOutputDevice out of OutputDevice interface, eliminating OutputDevice

media/blink/webaudiosourceprovider_impl.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_BLINK_WEBAUDIOSOURCEPROVIDER_IMPL_H_
 #define MEDIA_BLINK_WEBAUDIOSOURCEPROVIDER_IMPL_H_
 
 #include <stddef.h>
 
 #include <string>
@@ skipping 23 matching lines @@
 //   provideInput() periodically to fetch the appropriate data.
 //
 // In either case, the internal RenderCallback allows for delivering a copy of
 // the data if a listener is configured. WASPImpl is also a
 // RestartableAudioRendererSink itself in order to be controlled (Play(),
 // Pause() etc).
 //
 // All calls are protected by a lock.
 class MEDIA_BLINK_EXPORT WebAudioSourceProviderImpl
     : NON_EXPORTED_BASE(public blink::WebAudioSourceProvider),
-      NON_EXPORTED_BASE(public RestartableAudioRendererSink) {
+      NON_EXPORTED_BASE(public SwitchableAudioRendererSink) {
  public:
   using CopyAudioCB = base::Callback<
       void(scoped_ptr<AudioBus>, uint32_t delay_milliseconds, int sample_rate)>;
 
   explicit WebAudioSourceProviderImpl(
-      const scoped_refptr<RestartableAudioRendererSink>& sink);
+      const scoped_refptr<SwitchableAudioRendererSink>& sink);
 
   // blink::WebAudioSourceProvider implementation.
   void setClient(blink::WebAudioSourceProviderClient* client) override;
   void provideInput(const blink::WebVector<float*>& audio_data,
                     size_t number_of_frames) override;
 
   // RestartableAudioRendererSink implementation.
   void Start() override;
   void Stop() override;
   void Play() override;
   void Pause() override;
   bool SetVolume(double volume) override;
-  OutputDevice* GetOutputDevice() override;
+  OutputDeviceInfo GetOutputDeviceInfo() override;
   void Initialize(const AudioParameters& params,
                   RenderCallback* renderer) override;
+  void SwitchOutputDevice(const std::string& device_id,
+                          const url::Origin& security_origin,
+                          const OutputDeviceStatusCB& callback) override;
 
   // These methods allow a client to get a copy of the rendered audio.
   void SetCopyAudioCallback(const CopyAudioCB& callback);
   void ClearCopyAudioCallback();
 
  private:
   friend class WebAudioSourceProviderImplTest;
   ~WebAudioSourceProviderImpl() override;
 
   // Calls setFormat() on |client_| from the Blink renderer thread.
   void OnSetFormat();
 
   int RenderForTesting(AudioBus* audio_bus);
 
   // Used to keep the volume across reconfigurations.
   double volume_;
 
   // Tracks the current playback state.
   enum PlaybackState { kStopped, kStarted, kPlaying };
   PlaybackState state_;
 
   // Closure that calls OnSetFormat() on |client_| on the renderer thread.
   base::Closure set_format_cb_;
   // When set via setClient() it overrides |sink_| for consuming audio.
   blink::WebAudioSourceProviderClient* client_;
 
   // Where audio ends up unless overridden by |client_|.
   base::Lock sink_lock_;
-  const scoped_refptr<RestartableAudioRendererSink> sink_;
+  const scoped_refptr<SwitchableAudioRendererSink> sink_;
   scoped_ptr<AudioBus> bus_wrapper_;
 
   // An inner class acting as a T filter where actual data can be tapped.
   class TeeFilter;
   scoped_ptr<TeeFilter> tee_filter_;
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<WebAudioSourceProviderImpl> weak_factory_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(WebAudioSourceProviderImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_WEBAUDIOSOURCEPROVIDER_IMPL_H_