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

media/audio/win/waveout_output_win.cc

 // Copyright (c) 2006-2009 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.
 
 #include <windows.h>
 #include <mmsystem.h>
 #pragma comment(lib, "winmm.lib")
 
 #include "media/audio/win/waveout_output_win.h"
 
@@ skipping 197 matching lines @@
     state_ = PCMA_CLOSED;
     waveout_ = NULL;
     FreeBuffers();
   }
   // Tell the audio manager that we have been released. This can result in
   // the manager destroying us in-place so this needs to be the last thing
   // we do on this function.
   manager_->ReleaseStream(this);
 }
 
-void PCMWaveOutAudioOutputStream::SetVolume(double left_level,
-                                            double ) {
+void PCMWaveOutAudioOutputStream::SetVolume(double volume) {
   if (!waveout_)
     return;
-  volume_ = static_cast<float>(left_level);
+  volume_ = static_cast<float>(volume);
 }
 
-void PCMWaveOutAudioOutputStream::GetVolume(double* left_level,
-                                            double* right_level) {
+void PCMWaveOutAudioOutputStream::GetVolume(double* volume) {
   if (!waveout_)
     return;
-  *left_level = volume_;
-  *right_level = volume_;
+  *volume = volume_;
 }
 
 void PCMWaveOutAudioOutputStream::HandleError(MMRESULT error) {
   DLOG(WARNING) << "PCMWaveOutAudio error " << error;
   callback_->OnError(this, error);
 }
 
 void PCMWaveOutAudioOutputStream::QueueNextPacket(WAVEHDR *buffer) {
   // Call the source which will fill our buffer with pleasant sounds and
   // return to us how many bytes were used.
@@ skipping 62 matching lines @@
 
     obj->pending_bytes_ += buffer->dwBufferLength;
 
   } else if (msg == WOM_CLOSE) {
     // We can be closed before calling Start, so it is possible to have a
     // null callback at this point.
     if (obj->callback_)
       obj->callback_->OnClose(obj);
   }
 }