Adds volume level measurements to the AudioInputController for low-latency clients

content/browser/renderer_host/media/audio_input_renderer_host.h

 // Copyright (c) 2012 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.
 //
 // AudioInputRendererHost serves audio related requests from audio capturer
 // which lives inside the render process and provide access to audio hardware.
 //
 // Create stream sequence (AudioInputController = AIC):
 //
 // AudioInputHostMsg_CreateStream -> OnCreateStream -> AIC::CreateLowLatency ->
@@ skipping 101 matching lines @@
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
   // AudioInputController::EventHandler implementation.
   virtual void OnCreated(media::AudioInputController* controller) OVERRIDE;
   virtual void OnRecording(media::AudioInputController* controller) OVERRIDE;
   virtual void OnError(media::AudioInputController* controller,
       media::AudioInputController::ErrorCode error_code) OVERRIDE;
   virtual void OnData(media::AudioInputController* controller,
                       const uint8* data,
                       uint32 size) OVERRIDE;
+  virtual void OnLog(media::AudioInputController* controller,
+                     const std::string& message) OVERRIDE;
 
  private:
   // TODO(henrika): extend test suite (compare AudioRenderHost)
   friend class BrowserThread;
   friend class TestAudioInputRendererHost;
   friend class base::DeleteHelper<AudioInputRendererHost>;
 
   struct AudioEntry;
   typedef std::map<int, AudioEntry*> AudioEntryMap;
 
@@ skipping 27 matching lines @@
   // NotifyStreamCreated message to the peer.
   void DoCompleteCreation(media::AudioInputController* controller);
 
   // Send a state change message to the renderer.
   void DoSendRecordingMessage(media::AudioInputController* controller);
 
   // Handle error coming from audio stream.
   void DoHandleError(media::AudioInputController* controller,
       media::AudioInputController::ErrorCode error_code);
 
+  // Log audio level of captured audio stream.
+  void DoLog(media::AudioInputController* controller,
+             const std::string& message);
+
   // Send an error message to the renderer.
   void SendErrorMessage(int stream_id, ErrorCode error_code);
 
   // 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);
 
@@ skipping 27 matching lines @@
   media::UserInputMonitor* user_input_monitor_;
 
   scoped_ptr<media::AudioLog> audio_log_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioInputRendererHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_RENDERER_HOST_H_