Tab Audio Mirroring: WebContentsAudioInputStream is a new implementation which represents the lifet…

media/audio/audio_input_controller.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.
 
 #ifndef MEDIA_AUDIO_AUDIO_INPUT_CONTROLLER_H_
 #define MEDIA_AUDIO_AUDIO_INPUT_CONTROLLER_H_
 
 #include <string>
 #include "base/atomicops.h"
 #include "base/callback.h"
@@ skipping 128 matching lines @@
   // done, the event handler will receive an OnCreated() call from that same
   // thread.
   static scoped_refptr<AudioInputController> CreateLowLatency(
       AudioManager* audio_manager,
       EventHandler* event_handler,
       const AudioParameters& params,
       const std::string& device_id,
       // External synchronous writer for audio controller.
       SyncWriter* sync_writer);
 
+  // Factory method for creating an AudioInputController for low-latency mode,
+  // taking ownership of |stream|.  The stream will be opened on the audio
+  // thread, and when that is done, the event handler will receive an
+  // OnCreated() call from that same thread.
+  static scoped_refptr<AudioInputController> CreateForStream(
+      AudioManager* audio_manager,
+      EventHandler* event_handler,
+      AudioInputStream* stream,
+      // External synchronous writer for audio controller.
+      SyncWriter* sync_writer);
+
   // Starts recording using the created audio input stream.
   // This method is called on the creator thread.
   virtual void Record();
 
   // Closes the audio input stream. The state is changed and the resources
   // are freed on the audio thread. |closed_task| is then executed on the thread
   // that called Close().
   // Callbacks (EventHandler and SyncWriter) must exist until |closed_task|
   // is called.
   // It is safe to call this method more than once. Calls after the first one
@@ skipping 29 matching lines @@
     kClosed,
     kError
   };
 
   AudioInputController(EventHandler* handler, SyncWriter* sync_writer);
   virtual ~AudioInputController();
 
   // Methods called on the audio thread (owned by the AudioManager).
   void DoCreate(AudioManager* audio_manager, const AudioParameters& params,
                 const std::string& device_id);
+  void DoCreateForStream(AudioInputStream* stream_to_control);
   void DoRecord();
   void DoClose();
   void DoReportError(int code);
   void DoSetVolume(double volume);
   void DoSetAutomaticGainControl(bool enabled);
 
   // Method which ensures that OnError() is triggered when data recording
   // times out. Called on the audio thread.
   void DoCheckForNoData();
 
@@ skipping 43 matching lines @@
   static Factory* factory_;
 
   double max_volume_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioInputController);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AUDIO_INPUT_CONTROLLER_H_