Implement standalone event tracing in AppRTCDemo.

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 109 matching lines @@
   private boolean renderVideo;
   private VideoTrack localVideoTrack;
   private VideoTrack remoteVideoTrack;
 
   /**
    * Peer connection parameters.
    */
   public static class PeerConnectionParameters {
     public final boolean videoCallEnabled;
     public final boolean loopback;
+    public final boolean tracing;
     public final int videoWidth;
     public final int videoHeight;
     public final int videoFps;
     public final int videoStartBitrate;
     public final String videoCodec;
     public final boolean videoCodecHwAcceleration;
     public final boolean captureToTexture;
     public final int audioStartBitrate;
     public final String audioCodec;
     public final boolean noAudioProcessing;
     public final boolean useOpenSLES;
 
     public PeerConnectionParameters(
-        boolean videoCallEnabled, boolean loopback,
+        boolean videoCallEnabled, boolean loopback, boolean tracing,
         int videoWidth, int videoHeight, int videoFps, int videoStartBitrate,
         String videoCodec, boolean videoCodecHwAcceleration, boolean captureToTexture,
         int audioStartBitrate, String audioCodec,
         boolean noAudioProcessing, boolean useOpenSLES) {
       this.videoCallEnabled = videoCallEnabled;
       this.loopback = loopback;
+      this.tracing = tracing;
       this.videoWidth = videoWidth;
       this.videoHeight = videoHeight;
       this.videoFps = videoFps;
       this.videoStartBitrate = videoStartBitrate;
       this.videoCodec = videoCodec;
       this.videoCodecHwAcceleration = videoCodecHwAcceleration;
       this.captureToTexture = captureToTexture;
       this.audioStartBitrate = audioStartBitrate;
       this.audioCodec = audioCodec;
       this.noAudioProcessing = noAudioProcessing;
@@ skipping 117 matching lines @@
         closeInternal();
       }
     });
   }
 
   public boolean isVideoCallEnabled() {
     return videoCallEnabled;
   }
 
   private void createPeerConnectionFactoryInternal(Context context) {
+      PeerConnectionFactory.initializeInternalTracer();
+      if (peerConnectionParameters.tracing) {
+          PeerConnectionFactory.startInternalTracingCapture("/mnt/sdcard/webrtc-trace.txt");
+      }
     Log.d(TAG, "Create peer connection factory. Use video: " +
         peerConnectionParameters.videoCallEnabled);
     isError = false;
 
     // Initialize field trials.
     PeerConnectionFactory.initializeFieldTrials(FIELD_TRIAL_AUTOMATIC_RESIZE);
 
     // Check preferred video codec.
     preferredVideoCodec = VIDEO_CODEC_VP8;
     if (videoCallEnabled && peerConnectionParameters.videoCodec != null) {
@@ skipping 197 matching lines @@
       videoSource = null;
     }
     Log.d(TAG, "Closing peer connection factory.");
     if (factory != null) {
       factory.dispose();
       factory = null;
     }
     options = null;
     Log.d(TAG, "Closing peer connection done.");
     events.onPeerConnectionClosed();
+    PeerConnectionFactory.stopInternalTracingCapture();
+    PeerConnectionFactory.shutdownInternalTracer();
   }
 
   public boolean isHDVideo() {
     if (!videoCallEnabled) {
       return false;
     }
     int minWidth = 0;
     int minHeight = 0;
     for (KeyValuePair keyValuePair : videoConstraints.mandatory) {
       if (keyValuePair.getKey().equals("minWidth")) {
@@ skipping 531 matching lines @@
     public void onCreateFailure(final String error) {
       reportError("createSDP error: " + error);
     }
 
     @Override
     public void onSetFailure(final String error) {
       reportError("setSDP error: " + error);
     }
   }
 }