Support for video file instead of camera and output video out to file

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

Index: webrtc/examples/androidapp/src/org/appspot/apprtc/PeerConnectionClient.java
diff --git a/webrtc/examples/androidapp/src/org/appspot/apprtc/PeerConnectionClient.java b/webrtc/examples/androidapp/src/org/appspot/apprtc/PeerConnectionClient.java
index 238d123dea4f3d3249e0fab8b8139e83ca95e6e9..05ed71eb6ab1edd1d389fd68e8150bd4e19e1bd7 100644
--- a/webrtc/examples/androidapp/src/org/appspot/apprtc/PeerConnectionClient.java
+++ b/webrtc/examples/androidapp/src/org/appspot/apprtc/PeerConnectionClient.java
@@ -40,6 +40,9 @@ import org.webrtc.StatsObserver;
 import org.webrtc.StatsReport;
 import org.webrtc.VideoCapturer;
 import org.webrtc.VideoRenderer;
+import org.webrtc.VideoCapturerAndroid;
+import org.webrtc.CameraVideoCapturer;
+import org.webrtc.FileVideoCapturer;
 import org.webrtc.VideoSource;
 import org.webrtc.VideoTrack;
 import org.webrtc.voiceengine.WebRtcAudioManager;
@@ -163,6 +166,9 @@ public class PeerConnectionClient {
     public final boolean disableBuiltInAGC;
     public final boolean disableBuiltInNS;
     public final boolean enableLevelControl;
+    public final String videoFileAsCamera;
+    public final int videoFileAsCameraWidth;
+    public final int videoFileAsCameraHeight;
 
     public PeerConnectionParameters(
         boolean videoCallEnabled, boolean loopback, boolean tracing, boolean useCamera2,
@@ -171,7 +177,9 @@ public class PeerConnectionClient {
         boolean captureToTexture, int audioStartBitrate, String audioCodec,
         boolean noAudioProcessing, boolean aecDump, boolean useOpenSLES,
         boolean disableBuiltInAEC, boolean disableBuiltInAGC, boolean disableBuiltInNS,
-        boolean enableLevelControl) {
+        boolean enableLevelControl,
+        String videoFileAsCamera, int videoFileAsCameraWidth, int videoFileAsCameraHeight) {
+
       this.videoCallEnabled = videoCallEnabled;
       this.useCamera2 = useCamera2;
       this.loopback = loopback;
@@ -192,6 +200,9 @@ public class PeerConnectionClient {
       this.disableBuiltInAGC = disableBuiltInAGC;
       this.disableBuiltInNS = disableBuiltInNS;
       this.enableLevelControl = enableLevelControl;
+      this.videoFileAsCamera = videoFileAsCamera;
+      this.videoFileAsCameraWidth = videoFileAsCameraWidth;
+      this.videoFileAsCameraHeight = videoFileAsCameraHeight;
     }
   }
 
@@ -557,11 +568,26 @@ public class PeerConnectionClient {
         Logging.d(TAG, "Creating capturer using camera1 API.");
         createCapturer(new Camera1Enumerator(peerConnectionParameters.captureToTexture));
       }
-
       if (videoCapturer == null) {
         reportError("Failed to open camera");
         return;
       }
+      if (peerConnectionParameters.videoFileAsCamera != null) {
+        CameraVideoCapturer fileVideoCapturer = FileVideoCapturer.create(
+            new File(peerConnectionParameters.videoFileAsCamera),
+            peerConnectionParameters.videoFileAsCameraWidth,
+            peerConnectionParameters.videoFileAsCameraHeight,
+            videoCapturer);
+
+        if (fileVideoCapturer == null) {
+          Log.d(TAG, "Failed to open video file for emulated camera");
+          reportError("Failed to open video file for emulated camera");
+          return;
+        }
+        else {
+          videoCapturer = fileVideoCapturer;
+        }
+      }
       mediaStream.addTrack(createVideoTrack(videoCapturer));
     }