MuteSource Audio During Full Screen Cast

media/audio/audio_device_description.h

 // Copyright 2015 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_DEVICE_DESCRIPTION_H_
 #define MEDIA_AUDIO_AUDIO_DEVICE_DESCRIPTION_H_
 
 #include <string>
 #include "media/base/media_export.h"
 
@@ skipping 13 matching lines @@
   // Input device ID used to capture the default system playback stream. When
   // this device ID is passed to MakeAudioInputStream() the returned
   // AudioInputStream will be capturing audio currently being played on the
   // default playback device. At the moment this feature is supported only on
   // some platforms. AudioInputStream::Intialize() will return an error on
   // platforms that don't support it. GetInputStreamParameters() must be used
   // to get the parameters of the loopback device before creating a loopback
   // stream, otherwise stream initialization may fail.
   static const char kLoopbackInputDeviceId[];
 
+  // Similar to |kLoopbackInputDeviceId|, with only difference that this ID
+  // will mute system audio during capturing.
+  static const char kLoopbackWithMuteDeviceId[];
+
   // Returns true if |device_id| represents the default device.
   static bool IsDefaultDevice(const std::string& device_id);
 
   // If |device_id| is not empty, |session_id| should be ignored and the output
   // device should be selected basing on |device_id|.
   // If |device_id| is empty and |session_id| is nonzero, output device
   // associated with the opened input device designated by |session_id| should
   // be used.
   static bool UseSessionIdToSelectDevice(int session_id,
                                          const std::string& device_id);
 
   // Returns the localized name of the generic "default" device.
   static std::string GetDefaultDeviceName();
 
   // Returns the localized name of the generic default communications device.
   // This device is not supported on all platforms.
   static std::string GetCommunicationsDeviceName();
 
  private:
   AudioDeviceDescription() {}
   ~AudioDeviceDescription() {}
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AUDIO_DEVICE_DESCRIPTION_H_