Moves audio files from content\renderer\ to content\renderer\media.

content/renderer/audio_device.h

-// Copyright (c) 2011 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 CONTENT_RENDERER_AUDIO_DEVICE_H_
-#define CONTENT_RENDERER_AUDIO_DEVICE_H_
-#pragma once
-
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/shared_memory.h"
-#include "base/threading/simple_thread.h"
-#include "content/renderer/audio_message_filter.h"
-
-struct AudioParameters;
-
-// Each instance of AudioDevice corresponds to one host stream.
-// This class is not thread-safe, so its methods must be called from
-// the same thread.
-class AudioDevice : public AudioMessageFilter::Delegate,
-                    public base::DelegateSimpleThread::Delegate,
-                    public base::RefCountedThreadSafe<AudioDevice> {
- public:
-  class RenderCallback {
-   public:
-    virtual void Render(const std::vector<float*>& audio_data,
-                        size_t number_of_frames,
-                        size_t audio_delay_milliseconds) = 0;
-   protected:
-    virtual ~RenderCallback() {}
-  };
-
-  // |buffer_size| is the number of sample-frames.
-  AudioDevice(size_t buffer_size,
-              int channels,
-              double sample_rate,
-              RenderCallback* callback);
-  virtual ~AudioDevice();
-
-  // Starts audio playback. Returns |true| on success.
-  bool Start();
-
-  // Stops audio playback. Returns |true| on success.
-  bool Stop();
-
-  // Sets the playback volume, with range [0.0, 1.0] inclusive.
-  // Returns |true| on success.
-  bool SetVolume(double volume);
-
-  // Gets the playback volume, with range [0.0, 1.0] inclusive.
-  // Returns |true| on success.
-  bool GetVolume(double* volume);
-
-  double sample_rate() const { return sample_rate_; }
-  size_t buffer_size() const { return buffer_size_; }
-
- private:
-  // I/O thread backends to above functions.
-  void InitializeOnIOThread(const AudioParameters& params);
-  void StartOnIOThread();
-  void ShutDownOnIOThread();
-  void SetVolumeOnIOThread(double volume);
-
-  // AudioMessageFilter::Delegate implementation.
-  virtual void OnRequestPacket(AudioBuffersState buffers_state);
-  virtual void OnStateChanged(AudioStreamState state);
-  virtual void OnCreated(base::SharedMemoryHandle handle, uint32 length);
-  virtual void OnLowLatencyCreated(base::SharedMemoryHandle handle,
-                                   base::SyncSocket::Handle socket_handle,
-                                   uint32 length);
-  virtual void OnVolume(double volume);
-
-  // DelegateSimpleThread::Delegate implementation.
-  virtual void Run();
-
-  // Format
-  size_t buffer_size_;  // in sample-frames
-  int channels_;
-  int bits_per_sample_;
-  double sample_rate_;
-
-  // Calls the client's callback for rendering audio.
-  void FireRenderCallback();
-  RenderCallback* callback_;
-
-  // The client callback renders audio into here.
-  std::vector<float*> audio_data_;
-
-  // The client stores the last reported audio delay in this member.
-  // The delay shall reflect the amount of audio which still resides in
-  // the output buffer, i.e., the expected audio output delay.
-  int audio_delay_milliseconds_;
-
-  // The current volume scaling [0.0, 1.0] of the audio stream.
-  double volume_;
-
-  // Callbacks for rendering audio occur on this thread.
-  scoped_ptr<base::DelegateSimpleThread> audio_thread_;
-
-  // IPC message stuff.
-  base::SharedMemory* shared_memory() { return shared_memory_.get(); }
-  base::SyncSocket* socket() { return socket_.get(); }
-  void* shared_memory_data() { return shared_memory()->memory(); }
-
-  // MessageFilter used to send/receive IPC. THIS MUST ONLY BE ACCESSED ON THE
-  // I/O thread except to send messages and get the message loop.
-  static scoped_refptr<AudioMessageFilter> filter_;
-
-  // Our ID on the message filter. THIS MUST ONLY BE ACCESSED ON THE I/O THREAD
-  // or else you could race with the initialize function which sets it.
-  int32 stream_id_;
-
-  scoped_ptr<base::SharedMemory> shared_memory_;
-  scoped_ptr<base::SyncSocket> socket_;
-
-  DISALLOW_COPY_AND_ASSIGN(AudioDevice);
-};
-
-#endif  // CONTENT_RENDERER_AUDIO_DEVICE_H_