Add Datachannel support to Android AppRTCMobile

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.
  */
 
 package org.appspot.apprtc;
 
 import android.content.Context;
 import android.os.Environment;
 import android.os.ParcelFileDescriptor;
 import android.util.Log;
 import java.io.File;
 import java.io.IOException;
+import java.nio.ByteBuffer;
 import java.util.Collections;
 import java.util.EnumSet;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Timer;
 import java.util.TimerTask;
 import java.util.concurrent.Executors;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
@@ skipping 90 matching lines @@
   private MediaStream mediaStream;
   private VideoCapturer videoCapturer;
   // enableVideo is set to true if video should be rendered and sent.
   private boolean renderVideo;
   private VideoTrack localVideoTrack;
   private VideoTrack remoteVideoTrack;
   private RtpSender localVideoSender;
   // enableAudio is set to true if audio should be sent.
   private boolean enableAudio;
   private AudioTrack localAudioTrack;
+  private DataChannel dataChannel;
+  private boolean dataChannelEnabled;
 
   /**
    * Peer connection parameters.
+   */
+  public static class DataChannelParameters {
+    public final boolean ordered;
+    public final int maxRetransmitTimeMs;
+    public final int maxRetransmits;
+    public final String protocol;
+    public final boolean negotiated;
+    public final int id;
+
+    public DataChannelParameters(boolean ordered, int maxRetransmitTimeMs, int maxRetransmits,
+        String protocol, boolean negotiated, int id) {
+      this.ordered = ordered;
+      this.maxRetransmitTimeMs = maxRetransmitTimeMs;
+      this.maxRetransmits = maxRetransmits;
+      this.protocol = protocol;
+      this.negotiated = negotiated;
+      this.id = id;
+    }
+  }
+
+  /**
+   * 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 videoMaxBitrate;
     public final String videoCodec;
     public final boolean videoCodecHwAcceleration;
     public final int audioStartBitrate;
     public final String audioCodec;
     public final boolean noAudioProcessing;
     public final boolean aecDump;
     public final boolean useOpenSLES;
     public final boolean disableBuiltInAEC;
     public final boolean disableBuiltInAGC;
     public final boolean disableBuiltInNS;
     public final boolean enableLevelControl;
+    private final DataChannelParameters dataChannelParameters;
 
     public PeerConnectionParameters(boolean videoCallEnabled, boolean loopback, boolean tracing,
         int videoWidth, int videoHeight, int videoFps, int videoMaxBitrate, String videoCodec,
         boolean videoCodecHwAcceleration, int audioStartBitrate, String audioCodec,
         boolean noAudioProcessing, boolean aecDump, boolean useOpenSLES, boolean disableBuiltInAEC,
         boolean disableBuiltInAGC, boolean disableBuiltInNS, boolean enableLevelControl) {
+      this(videoCallEnabled, loopback, tracing, videoWidth, videoHeight, videoFps, videoMaxBitrate,
+          videoCodec, videoCodecHwAcceleration, audioStartBitrate, audioCodec, noAudioProcessing,
+          aecDump, useOpenSLES, disableBuiltInAEC, disableBuiltInAGC, disableBuiltInNS,
+          enableLevelControl, null);
+    }
+
+    public PeerConnectionParameters(boolean videoCallEnabled, boolean loopback, boolean tracing,
+        int videoWidth, int videoHeight, int videoFps, int videoMaxBitrate, String videoCodec,
+        boolean videoCodecHwAcceleration, int audioStartBitrate, String audioCodec,
+        boolean noAudioProcessing, boolean aecDump, boolean useOpenSLES, boolean disableBuiltInAEC,
+        boolean disableBuiltInAGC, boolean disableBuiltInNS, boolean enableLevelControl,
+        DataChannelParameters dataChannelParameters) {
       this.videoCallEnabled = videoCallEnabled;
       this.loopback = loopback;
       this.tracing = tracing;
       this.videoWidth = videoWidth;
       this.videoHeight = videoHeight;
       this.videoFps = videoFps;
       this.videoMaxBitrate = videoMaxBitrate;
       this.videoCodec = videoCodec;
       this.videoCodecHwAcceleration = videoCodecHwAcceleration;
       this.audioStartBitrate = audioStartBitrate;
       this.audioCodec = audioCodec;
       this.noAudioProcessing = noAudioProcessing;
       this.aecDump = aecDump;
       this.useOpenSLES = useOpenSLES;
       this.disableBuiltInAEC = disableBuiltInAEC;
       this.disableBuiltInAGC = disableBuiltInAGC;
       this.disableBuiltInNS = disableBuiltInNS;
       this.enableLevelControl = enableLevelControl;
+      this.dataChannelParameters = dataChannelParameters;
     }
   }
 
   /**
    * Peer connection events.
    */
   public interface PeerConnectionEvents {
     /**
      * Callback fired once local SDP is created and set.
      */
@@ skipping 50 matching lines @@
 
   public void setPeerConnectionFactoryOptions(PeerConnectionFactory.Options options) {
     this.options = options;
   }
 
   public void createPeerConnectionFactory(final Context context,
       final PeerConnectionParameters peerConnectionParameters, final PeerConnectionEvents events) {
     this.peerConnectionParameters = peerConnectionParameters;
     this.events = events;
     videoCallEnabled = peerConnectionParameters.videoCallEnabled;
+    dataChannelEnabled = peerConnectionParameters.dataChannelParameters != null;
     // Reset variables to initial states.
     this.context = null;
     factory = null;
     peerConnection = null;
     preferIsac = false;
     videoCapturerStopped = false;
     isError = false;
     queuedRemoteCandidates = null;
     localSdp = null; // either offer or answer SDP
     mediaStream = null;
@@ skipping 221 matching lines @@
     // TCP candidates are only useful when connecting to a server that supports
     // ICE-TCP.
     rtcConfig.tcpCandidatePolicy = PeerConnection.TcpCandidatePolicy.DISABLED;
     rtcConfig.bundlePolicy = PeerConnection.BundlePolicy.MAXBUNDLE;
     rtcConfig.rtcpMuxPolicy = PeerConnection.RtcpMuxPolicy.REQUIRE;
     rtcConfig.continualGatheringPolicy = PeerConnection.ContinualGatheringPolicy.GATHER_CONTINUALLY;
     // Use ECDSA encryption.
     rtcConfig.keyType = PeerConnection.KeyType.ECDSA;
 
     peerConnection = factory.createPeerConnection(rtcConfig, pcConstraints, pcObserver);
+
+    if (dataChannelEnabled) {
+      DataChannel.Init init = new DataChannel.Init();
+      init.ordered = peerConnectionParameters.dataChannelParameters.ordered;
+      init.negotiated = peerConnectionParameters.dataChannelParameters.negotiated;
+      init.maxRetransmits = peerConnectionParameters.dataChannelParameters.maxRetransmits;
+      init.maxRetransmitTimeMs = peerConnectionParameters.dataChannelParameters.maxRetransmitTimeMs;
+      init.id = peerConnectionParameters.dataChannelParameters.id;
+      init.protocol = peerConnectionParameters.dataChannelParameters.protocol;
+      dataChannel = peerConnection.createDataChannel("ApprtcDemo data", init);
+    }
     isInitiator = false;
 
     // Set default WebRTC tracing and INFO libjingle logging.
     // NOTE: this _must_ happen while |factory| is alive!
     Logging.enableTracing("logcat:", EnumSet.of(Logging.TraceLevel.TRACE_DEFAULT));
     Logging.enableLogToDebugOutput(Logging.Severity.LS_INFO);
 
     mediaStream = factory.createLocalMediaStream("ARDAMS");
     if (videoCallEnabled) {
       mediaStream.addTrack(createVideoTrack(videoCapturer));
@@ skipping 20 matching lines @@
 
     Log.d(TAG, "Peer connection created.");
   }
 
   private void closeInternal() {
     if (factory != null && peerConnectionParameters.aecDump) {
       factory.stopAecDump();
     }
     Log.d(TAG, "Closing peer connection.");
     statsTimer.cancel();
+    if (dataChannel != null) {
+      dataChannel.dispose();
+      dataChannel = null;
+    }
     if (peerConnection != null) {
       peerConnection.dispose();
       peerConnection = null;
     }
     Log.d(TAG, "Closing audio source.");
     if (audioSource != null) {
       audioSource.dispose();
       audioSource = null;
     }
     Log.d(TAG, "Stopping capture.");
@@ skipping 532 matching lines @@
       executor.execute(new Runnable() {
         @Override
         public void run() {
           remoteVideoTrack = null;
         }
       });
     }
 
     @Override
     public void onDataChannel(final DataChannel dc) {
-      reportError("AppRTC doesn't use data channels, but got: " + dc.label() + " anyway!");
+      Log.d(TAG, "New Data channel " + dc.label());
+
+      if (!dataChannelEnabled)
+        return;
+
+      dc.registerObserver(new DataChannel.Observer() {
+        public void onBufferedAmountChange(long previousAmount) {
+          Log.d(TAG, "Data channel buffered amount changed: " + dc.label() + ": " + dc.state());
+        }
+
+        @Override
+        public void onStateChange() {
+          Log.d(TAG, "Data channel state changed: " + dc.label() + ": " + dc.state());
+        }
+
+        @Override
+        public void onMessage(final DataChannel.Buffer buffer) {
+          if (buffer.binary) {
+            Log.d(TAG, "Received binary msg over " + dc);
+            return;
+          }
+          ByteBuffer data = buffer.data;
+          final byte[] bytes = new byte[data.capacity()];
+          data.get(bytes);
+          String strData = new String(bytes);
+          Log.d(TAG, "Got msg: " + strData + " over " + dc);
+        }
+      });
     }
 
     @Override
     public void onRenegotiationNeeded() {
       // No need to do anything; AppRTC follows a pre-agreed-upon
       // signaling/negotiation protocol.
     }
   }
 
   // Implementation detail: handle offer creation/signaling and answer setting,
@@ skipping 69 matching lines @@
     public void onCreateFailure(final String error) {
       reportError("createSDP error: " + error);
     }
 
     @Override
     public void onSetFailure(final String error) {
       reportError("setSDP error: " + error);
     }
   }
 }