Android Screen Capturer.

webrtc/api/android/java/src/org/webrtc/VideoCapturer.java

 /*
  *  Copyright 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 107 matching lines @@
   void stopCapture() throws InterruptedException;
 
   void onOutputFormatRequest(int width, int height, int framerate);
 
   void changeCaptureFormat(int width, int height, int framerate);
 
   /**
    * Perform any final cleanup here. No more capturing will be done after this call.
    */
   void dispose();
+
+  /**
+   * @return true if-and-only-if this is a screen capturer.
+   */
+  boolean isScreencast();
 }