MuteSource Audio During Full Screen Cast

media/audio/win/audio_low_latency_input_win.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.
 //
 // Implementation of AudioInputStream for Windows using Windows Core Audio
 // WASAPI for low latency capturing.
 //
 // Overview of operation:
 //
 // - An object of WASAPIAudioInputStream is created by the AudioManager
@@ skipping 189 matching lines @@
   // recorded.
   base::win::ScopedHandle audio_samples_ready_event_;
 
   // This event will be signaled when capturing shall stop.
   base::win::ScopedHandle stop_capture_event_;
 
   // Extra audio bus used for storage of deinterleaved data for the OnData
   // callback.
   std::unique_ptr<media::AudioBus> audio_bus_;
 
+  // True, if we have muted the system audio for the stream capturing.

[henrika (OOO until Aug 14), 2016/07/25 08:38:19]

Extend the comments here and make it clear that the member is only touched under
special circumstances (device_id_ ==
AudioDeviceDescription::kLoopbackWithMuteDeviceId). Also, make it more clear
that it is not set by any external API but to store a local state.

[qiangchen, 2016/07/25 22:42:22]

Done.

+  bool mute_done_;
+
   DISALLOW_COPY_AND_ASSIGN(WASAPIAudioInputStream);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_WIN_AUDIO_LOW_LATENCY_INPUT_WIN_H_