Android AppRTCDemo: Add slider for changing camera capture quality during call

webrtc/examples/androidapp/src/org/appspot/apprtc/PeerConnectionClient.java

 /*
  *  Copyright 2014 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 826 matching lines @@
 
   public void switchCamera() {
     executor.execute(new Runnable() {
       @Override
       public void run() {
         switchCameraInternal();
       }
     });
   }
 
+  public void changeCaptureFormat(final int width, final int height, final int framerate) {
+    executor.execute(new Runnable() {
+      @Override
+      public void run() {
+        changeCaptureFormatInternal(width, height, framerate);
+      }
+    });
+  }
+
+  private void changeCaptureFormatInternal(int width, int height, int framerate) {
+    if (!videoCallEnabled || isError || videoCapturer == null) {
+      Log.e(TAG, "Failed to change capture format. Video: " + videoCallEnabled + ". Error : "
+          + isError);
+      return;
+    }
+    videoCapturer.onOutputFormatRequest(width, height, framerate);
+  }
+
   // Implementation detail: observe ICE & stream changes and react accordingly.
   private class PCObserver implements PeerConnection.Observer {
     @Override
     public void onIceCandidate(final IceCandidate candidate){
       executor.execute(new Runnable() {
         @Override
         public void run() {
           events.onIceCandidate(candidate);
         }
       });
@@ skipping 152 matching lines @@
     public void onCreateFailure(final String error) {
       reportError("createSDP error: " + error);
     }
 
     @Override
     public void onSetFailure(final String error) {
       reportError("setSDP error: " + error);
     }
   }
 }