Move core pieces of browser\renderer_host to src\content.

chrome/browser/renderer_host/audio_renderer_host.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.
-//
-// AudioRendererHost serves audio related requests from AudioRenderer which
-// lives inside the render process and provide access to audio hardware.
-//
-// This class is owned by BrowserRenderProcessHost, and instantiated on UI
-// thread, but all other operations and method calls happen on IO thread, so we
-// need to be extra careful about the lifetime of this object. AudioManager is a
-// singleton and created in IO thread, audio output streams are also created in
-// the IO thread, so we need to destroy them also in IO thread. After this class
-// is created, a task of OnInitialized() is posted on IO thread in which
-// singleton of AudioManager is created and.
-//
-// Here's an example of a typical IPC dialog for audio:
-//
-//   Renderer                     AudioRendererHost
-//      |                               |
-//      |         CreateStream >        |
-//      |          < Created            |
-//      |                               |
-//      |             Play >            |
-//      |           < Playing           |  time
-//      |                               |
-//      |     < RequestAudioPacket      |
-//      |      AudioPacketReady >       |
-//      |             ...               |
-//      |     < RequestAudioPacket      |
-//      |      AudioPacketReady >       |
-//      |                               |
-//      |             ...               |
-//      |     < RequestAudioPacket      |
-//      |      AudioPacketReady >       |
-//      |             ...               |
-//      |           Pause >             |
-//      |          < Paused             |
-//      |            ...                |
-//      |           Start >             |
-//      |          < Started            |
-//      |             ...               |
-//      |            Close >            |
-//      v                               v
-
-// The above mode of operation uses relatively big buffers and has latencies
-// of 50 ms or more. There is a second mode of operation which is low latency.
-// For low latency audio, the picture above is modified by not having the
-// RequestAudioPacket and the AudioPacketReady messages, instead a SyncSocket
-// pair is used to signal buffer readiness without having to route messages
-// using the IO thread.
 
 #ifndef CHROME_BROWSER_RENDERER_HOST_AUDIO_RENDERER_HOST_H_
 #define CHROME_BROWSER_RENDERER_HOST_AUDIO_RENDERER_HOST_H_
 #pragma once
 
-#include <map>
-
-#include "base/gtest_prod_util.h"
-#include "base/process.h"
-#include "base/ref_counted.h"
-#include "base/scoped_ptr.h"
-#include "base/shared_memory.h"
-#include "chrome/browser/browser_message_filter.h"
-#include "chrome/browser/browser_thread.h"
-#include "ipc/ipc_message.h"
-#include "media/audio/audio_io.h"
-#include "media/audio/audio_output_controller.h"
-#include "media/audio/simple_sources.h"
-
-class AudioManager;
-struct ViewHostMsg_Audio_CreateStream_Params;
-
-class AudioRendererHost : public BrowserMessageFilter,
-                          public media::AudioOutputController::EventHandler {
- public:
-  typedef std::pair<int32, int> AudioEntryId;
-
-  struct AudioEntry {
-    AudioEntry();
-    ~AudioEntry();
-
-    // The AudioOutputController that manages the audio stream.
-    scoped_refptr<media::AudioOutputController> controller;
-
-    // Render view ID that requested the audio stream.
-    int32 render_view_id;
-
-    // The audio stream ID in the render view.
-    int stream_id;
-
-    // Shared memory for transmission of the audio data.
-    base::SharedMemory shared_memory;
-
-    // The synchronous reader to be used by the controller. We have the
-    // ownership of the reader.
-    scoped_ptr<media::AudioOutputController::SyncReader> reader;
-
-    bool pending_buffer_request;
-
-    // Set to true after we called Close() for the controller.
-    bool pending_close;
-  };
-
-  typedef std::map<AudioEntryId, AudioEntry*> AudioEntryMap;
-
-  // Called from UI thread from the owner of this object.
-  AudioRendererHost();
-
-
-  // BrowserMessageFilter implementation.
-  virtual void OnChannelClosing();
-  virtual void OnDestruct() const;
-  virtual bool OnMessageReceived(const IPC::Message& message,
-                                 bool* message_was_ok);
-
-  /////////////////////////////////////////////////////////////////////////////
-  // AudioOutputController::EventHandler implementations.
-  virtual void OnCreated(media::AudioOutputController* controller);
-  virtual void OnPlaying(media::AudioOutputController* controller);
-  virtual void OnPaused(media::AudioOutputController* controller);
-  virtual void OnError(media::AudioOutputController* controller,
-                       int error_code);
-  virtual void OnMoreData(media::AudioOutputController* controller,
-                          AudioBuffersState buffers_state);
-
- private:
-  friend class AudioRendererHostTest;
-  friend class BrowserThread;
-  friend class DeleteTask<AudioRendererHost>;
-  friend class MockAudioRendererHost;
-  FRIEND_TEST_ALL_PREFIXES(AudioRendererHostTest, CreateMockStream);
-  FRIEND_TEST_ALL_PREFIXES(AudioRendererHostTest, MockStreamDataConversation);
-
-  virtual ~AudioRendererHost();
-
-  ////////////////////////////////////////////////////////////////////////////
-  // Methods called on IO thread.
-  // Returns true if the message is an audio related message and should be
-  // handled by this class.
-  bool IsAudioRendererHostMessage(const IPC::Message& message);
-
-  // Audio related IPC message handlers.
-  // Creates an audio output stream with the specified format. If this call is
-  // successful this object would keep an internal entry of the stream for the
-  // required properties.
-  void OnCreateStream(const IPC::Message& msg, int stream_id,
-                      const ViewHostMsg_Audio_CreateStream_Params& params,
-                      bool low_latency);
-
-  // Play the audio stream referenced by |stream_id|.
-  void OnPlayStream(const IPC::Message& msg, int stream_id);
-
-  // Pause the audio stream referenced by |stream_id|.
-  void OnPauseStream(const IPC::Message& msg, int stream_id);
-
-  // Discard all audio data in  stream referenced by |stream_id|.
-  void OnFlushStream(const IPC::Message& msg, int stream_id);
-
-  // Close the audio stream referenced by |stream_id|.
-  void OnCloseStream(const IPC::Message& msg, int stream_id);
-
-  // Set the volume of the audio stream referenced by |stream_id|.
-  void OnSetVolume(const IPC::Message& msg, int stream_id, double volume);
-
-  // Get the volume of the audio stream referenced by |stream_id|.
-  void OnGetVolume(const IPC::Message& msg, int stream_id);
-
-  // Notify packet has been prepared for the audio stream.
-  void OnNotifyPacketReady(const IPC::Message& msg, int stream_id,
-                           uint32 packet_size);
-
-  // Complete the process of creating an audio stream. This will set up the
-  // shared memory or shared socket in low latency mode.
-  void DoCompleteCreation(media::AudioOutputController* controller);
-
-  // Send a state change message to the renderer.
-  void DoSendPlayingMessage(media::AudioOutputController* controller);
-  void DoSendPausedMessage(media::AudioOutputController* controller);
-
-  // Request more data from the renderer. This method is used only in normal
-  // latency mode.
-  void DoRequestMoreData(media::AudioOutputController* controller,
-                         AudioBuffersState buffers_state);
-
-  // Handle error coming from audio stream.
-  void DoHandleError(media::AudioOutputController* controller, int error_code);
-
-  // Send an error message to the renderer.
-  void SendErrorMessage(int32 render_view_id, int32 stream_id);
-
-  // Delete all audio entry and all audio streams
-  void DeleteEntries();
-
-  // Closes the stream. The stream is then deleted in DeleteEntry() after it
-  // is closed.
-  void CloseAndDeleteStream(AudioEntry* entry);
-
-  // Called on the audio thread after the audio stream is closed.
-  void OnStreamClosed(AudioEntry* entry);
-
-  // Delete an audio entry and close the related audio stream.
-  void DeleteEntry(AudioEntry* entry);
-
-  // Delete audio entry and close the related audio stream due to an error,
-  // and error message is send to the renderer.
-  void DeleteEntryOnError(AudioEntry* entry);
-
-  // A helper method to look up a AudioEntry with a tuple of render view
-  // id and stream id. Returns NULL if not found.
-  AudioEntry* LookupById(int render_view_id, int stream_id);
-
-  // Search for a AudioEntry having the reference to |controller|.
-  // This method is used to look up an AudioEntry after a controller
-  // event is received.
-  AudioEntry* LookupByController(media::AudioOutputController* controller);
-
-  // A map of id to audio sources.
-  AudioEntryMap audio_entries_;
-
-  DISALLOW_COPY_AND_ASSIGN(AudioRendererHost);
-};
+// TODO(jam): remove this file when all files have been converted.
+#include "content/browser/renderer_host/audio_renderer_host.h"
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_AUDIO_RENDERER_HOST_H_