Unmute Tab Audio For Desktop Share

media/audio/virtual_audio_input_stream.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_VIRTUAL_AUDIO_INPUT_STREAM_H_
 #define MEDIA_AUDIO_VIRTUAL_AUDIO_INPUT_STREAM_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 42 matching lines @@
   void Start(AudioInputCallback* callback) override;
   void Stop() override;
   void Close() override;
   double GetMaxVolume() override;
   void SetVolume(double volume) override;
   double GetVolume() override;
   bool SetAutomaticGainControl(bool enabled) override;
   bool GetAutomaticGainControl() override;
   bool IsMuted() override;
 
-  // Attaches a VirtualAudioOutputStream to be used as input. This
+  // Attaches an AudioConverter::InputCallback to be used as input. This
   // VirtualAudioInputStream must outlive all attached streams, so any attached
   // stream must be closed (which causes a detach) before
   // VirtualAudioInputStream is destroyed.
-  virtual void AddOutputStream(VirtualAudioOutputStream* stream,
-                               const AudioParameters& output_params);
+  virtual void AddInputProvider(AudioConverter::InputCallback* input,
+                                const AudioParameters& params);
 
-  // Detaches a VirtualAudioOutputStream and removes it as input.
-  virtual void RemoveOutputStream(VirtualAudioOutputStream* stream,
-                                  const AudioParameters& output_params);
+  // Detaches an AudioConverter::InputCallback and removes it as input.
+  virtual void RemoveInputProvider(AudioConverter::InputCallback* input,
+                                   const AudioParameters& params);
+
+  // Returns the task runner that AudioInputCallback is running.
+  scoped_refptr<base::SingleThreadTaskRunner> GetTaskRunner() const;

[miu, 2016/05/28 02:45:00]

Please remove this, since the data copying should happen in AOC.

[qiangchen, 2016/05/31 21:17:33]

Done.

 
  private:
   friend class VirtualAudioInputStreamTest;
 
   typedef std::map<AudioParameters, LoopbackAudioConverter*> AudioConvertersMap;
 
   // Pulls audio data from all attached VirtualAudioOutputStreams, mixes and
   // converts the streams into one, and pushes the result to |callback_|.
   // Invoked on the worker thread.
   void PumpAudio();
@@ skipping 28 matching lines @@
   std::unique_ptr<AudioBus> audio_bus_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(VirtualAudioInputStream);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_VIRTUAL_AUDIO_INPUT_STREAM_H_