Simplified AudioOutputStream interface.

media/audio/win/waveout_output_win.h

 // Copyright (c) 2010 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_AUDIO_WIN_WAVEOUT_OUTPUT_WIN_H_
 #define MEDIA_AUDIO_WIN_WAVEOUT_OUTPUT_WIN_H_
 
 #include <windows.h>
 #include <mmsystem.h>
 #include <mmreg.h>
@@ skipping 17 matching lines @@
 class PCMWaveOutAudioOutputStream : public AudioOutputStream {
  public:
   // The ctor takes all the usual parameters, plus |manager| which is the
   // the audio manager who is creating this object and |device_id| which
   // is provided by the operating system.
   PCMWaveOutAudioOutputStream(AudioManagerWin* manager, AudioParameters params,
                               int num_buffers, UINT device_id);
   virtual ~PCMWaveOutAudioOutputStream();
 
   // Implementation of AudioOutputStream.
-  virtual bool Open(uint32 packet_size);
+  virtual bool Open();
   virtual void Close();
   virtual void Start(AudioSourceCallback* callback);
   virtual void Stop();
   virtual void SetVolume(double volume);
   virtual void GetVolume(double* volume);
 
   // Sends a buffer to the audio driver for playback.
   void QueueNextPacket(WAVEHDR* buffer);
 
  private:
   enum State {
     PCMA_BRAND_NEW,    // Initial state.
     PCMA_READY,        // Device obtained and ready to play.
     PCMA_PLAYING,      // Playing audio.
     PCMA_STOPPING,     // Trying to stop, waiting for callback to finish.
     PCMA_STOPPED,      // Stopped. Device was reset.
     PCMA_CLOSED        // Device has been released.
   };
 
   // Windows calls us back to feed more data to the device here. See msdn
   // documentation for 'waveOutProc' for details about the parameters.
   static void CALLBACK WaveCallback(HWAVEOUT hwo, UINT msg, DWORD_PTR instance,
                                     DWORD_PTR param1, DWORD_PTR param2);
 
   // If windows reports an error this function handles it and passes it to
   // the attached AudioSourceCallback::OnError().
   void HandleError(MMRESULT error);
   // Allocates and prepares the memory that will be used for playback. Only
   // two buffers are created.
-  void SetupBuffers(uint32 rq_size);
+  void SetupBuffers();
   // Deallocates the memory allocated in SetupBuffers.
   void FreeBuffers();
 
   // Reader beware. Visual C has stronger guarantees on volatile vars than
   // most people expect. In fact, it has release semantics on write and
   // acquire semantics on reads. See the msdn documentation.
   volatile State state_;
 
   // The audio manager that created this output stream. We notify it when
   // we close so it can release its own resources.
@@ skipping 30 matching lines @@
   // Pointer to the first allocated audio buffer. This object owns it.
   WAVEHDR* buffer_;
 
   // An event that is signaled when the callback thread is ready to stop.
   ScopedHandle stopped_event_;
 
   DISALLOW_COPY_AND_ASSIGN(PCMWaveOutAudioOutputStream);
 };
 
 #endif  // MEDIA_AUDIO_WIN_WAVEOUT_OUTPUT_WIN_H_
-