Adding webrtc_video_streaming test
This test is streaming video and audio between two bots using webrtc js api.

R=andresp@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/28469004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7261 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/tools/rtcbot/bot/browser/bot.js b/webrtc/tools/rtcbot/bot/browser/bot.js
index 130d006..8839802 100644
--- a/webrtc/tools/rtcbot/bot/browser/bot.js
+++ b/webrtc/tools/rtcbot/bot/browser/bot.js
@@ -5,23 +5,80 @@
 // 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.
+//
+var localStreams = [];
+var remoteStreams = [];
 
-var botExposedApi = {
-  ping: function (callback) {
-    callback("pong");
-  },
+function ping(callback) {
+  callback("pong");
+}
 
-  createPeerConnection: function (doneCallback) {
-    console.log("Creating peer connection");
-    var pc = new webkitRTCPeerConnection(null);
-    var obj = {};
-    expose(obj, pc, "close");
-    expose(obj, pc, "createOffer");
-    expose(obj, pc, "createAnswer");
-    expose(obj, pc, "setRemoteDescription", { 0: RTCSessionDescription });
-    expose(obj, pc, "setLocalDescription", { 0: RTCSessionDescription });
-    doneCallback(obj);
-  },
+function getUserMedia(constraints, onSuccessCallback, onFailCallback){
+  console.log("Getting user media.");
+  navigator.webkitGetUserMedia(constraints,
+      onSuccessCallbackWraper, onFailCallback);
+
+  function onSuccessCallbackWraper(stream) {
+    console.log("GetUserMedia success.");
+    localStreams[stream.id] = stream;
+    onSuccessCallback(stream);
+  }
+}
+
+function createPeerConnection(doneCallback, failCallback) {
+  console.log("Creating peer connection");
+  var obj = {};
+  var pc = new webkitRTCPeerConnection(null);
+
+  expose(obj, pc, "close");
+  expose(obj, pc, "createOffer");
+  expose(obj, pc, "createAnswer");
+  expose(obj, pc, "addEventListener");
+  expose(obj, pc, "addIceCandidate", { 0: RTCIceCandidate});
+  expose(obj, pc, "setRemoteDescription", { 0: RTCSessionDescription });
+  expose(obj, pc, "setLocalDescription", { 0: RTCSessionDescription });
+
+  obj.addStream = function(stream) {
+    console.log("Adding local stream.");
+    var tempStream = localStreams[stream.id];
+    if (!tempStream) {
+      console.log("Undefined stream!");
+      return;
+    }
+    pc.addStream(tempStream);
+  };
+
+  pc.addEventListener('addstream', function(event) {
+    remoteStreams[event.stream.id] = event.stream;
+  });
+
+  doneCallback(obj);
+}
+
+function showStream(streamId, autoplay, muted) {
+  var stream = getStreamFromIdentifier_(streamId);
+  var video = document.createElement('video');
+  video.autoplay = autoplay;
+  video.muted = muted;
+  document.body.appendChild(video);
+  video.src = URL.createObjectURL(stream);
+  console.log("Stream " + stream.id + " attached to video element");
 };
 
-connectToServer(botExposedApi);
+function getStreamFromIdentifier_(id) {
+  var tempStream = localStreams[id];
+  if (tempStream)
+    return tempStream;
+  tempStream = remoteStreams[id];
+  if (tempStream)
+    return tempStream;
+  console.log(id + " is not id for stream.");
+  return null;
+}
+
+connectToServer({
+  ping: ping,
+  getUserMedia: getUserMedia,
+  createPeerConnection: createPeerConnection,
+  showStream: showStream,
+});