SetVolume and GetVolume take one volume instead of separate left and right vo...

chrome/browser/renderer_host/audio_renderer_host.h

 // Copyright (c) 2009 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.
 //
 // AudioRendererHost serves audio related requests from AudioRenderer which
 // lives inside the render process and provide access to audio hardware. It maps
 // an internal ID to AudioRendererHost::IPCAudioSource in a map, which is the
 // actual object providing audio packets through IPC. It creates the actual
 // AudioOutputStream object when requested by the renderer provided with
 // render view id and stream id.
@@ skipping 173 matching lines @@
     // to AudioOutputStream::STATE_PAUSED and the state update is sent to
     // the renderer.
     void Pause();
 
     // Closes the audio output stream. After calling this method all activities
     // of the audio output stream are stopped.
     void Close();
 
     // Sets the volume of the audio output stream. There's no IPC messages
     // sent back to the renderer upon success and failure.
-    void SetVolume(double left, double right);
+    void SetVolume(double volume);
 
     // Gets the volume of the audio output stream.
     // ViewMsg_NotifyAudioStreamVolume is sent back to renderer with volume
     // information if succeeded.
     void GetVolume();
 
     // Notify this source that buffer has been filled and is ready to be
     // consumed.
     void NotifyPacketReady(size_t packet_size);
 
@@ skipping 87 matching lines @@
   // Closes the audio output stream, delegates the close method call to the
   // corresponding IPCAudioSource::Close(), no returning IPC message to renderer
   // upon success and failure.
   void OnCloseStream(const IPC::Message& msg, int stream_id);
 
   // Set the volume for the stream specified. Delegates the SetVolume() method
   // call to IPCAudioSource. No returning IPC message to renderer upon success.
   // ViewMsg_NotifyAudioStreamStateChanged with
   // AudioOutputStream::AUDIO_STREAM_ERROR is sent back to renderer if the
   // required IPCAudioSource is not found.
-  void OnSetVolume(const IPC::Message& msg, int stream_id,
-                   double left_channel, double right_channel);
+  void OnSetVolume(const IPC::Message& msg, int stream_id, double volume);
 
   // Gets the volume of the stream specified, delegates to corresponding
   // IPCAudioSource::GetVolume(), see the method for more details.
   // ViewMsg_NotifyAudioStreamStateChanged with
   // AudioOutputStream::AUDIO_STREAM_ERROR is sent back to renderer if the
   // required IPCAudioSource is not found.
   void OnGetVolume(const IPC::Message& msg, int stream_id);
 
   // Notify packet has been prepared for stream, delegates to corresponding
   // IPCAudioSource::NotifyPacketReady(), see the method for more details.
@@ skipping 30 matching lines @@
 
   // A map of id to audio sources.
   typedef std::pair<int32, int32> SourceID;
   typedef std::map<SourceID, IPCAudioSource*> SourceMap;
   SourceMap sources_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioRendererHost);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_AUDIO_RENDERER_HOST_H_