Reland of Android: Add field trial for Intel HW Vp8 encoder

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 55 matching lines @@
   public static final String AUDIO_TRACK_ID = "ARDAMSa0";
   public static final String VIDEO_TRACK_TYPE = "video";
   private static final String TAG = "PCRTCClient";
   private static final String VIDEO_CODEC_VP8 = "VP8";
   private static final String VIDEO_CODEC_VP9 = "VP9";
   private static final String VIDEO_CODEC_H264 = "H264";
   private static final String AUDIO_CODEC_OPUS = "opus";
   private static final String AUDIO_CODEC_ISAC = "ISAC";
   private static final String VIDEO_CODEC_PARAM_START_BITRATE = "x-google-start-bitrate";
   private static final String VIDEO_FLEXFEC_FIELDTRIAL = "WebRTC-FlexFEC-03/Enabled/";
+  private static final String VIDEO_VP8_INTEL_HW_ENCODER_FIELDTRIAL = "WebRTC-IntelVP8/Enabled/";
   private static final String AUDIO_CODEC_PARAM_BITRATE = "maxaveragebitrate";
   private static final String AUDIO_ECHO_CANCELLATION_CONSTRAINT = "googEchoCancellation";
   private static final String AUDIO_AUTO_GAIN_CONTROL_CONSTRAINT = "googAutoGainControl";
   private static final String AUDIO_HIGH_PASS_FILTER_CONSTRAINT = "googHighpassFilter";
   private static final String AUDIO_NOISE_SUPPRESSION_CONSTRAINT = "googNoiseSuppression";
   private static final String AUDIO_LEVEL_CONTROL_CONSTRAINT = "levelControl";
   private static final String DTLS_SRTP_KEY_AGREEMENT_CONSTRAINT = "DtlsSrtpKeyAgreement";
   private static final int HD_VIDEO_WIDTH = 1280;
   private static final int HD_VIDEO_HEIGHT = 720;
   private static final int BPS_IN_KBPS = 1000;
@@ skipping 278 matching lines @@
     if (peerConnectionParameters.tracing) {
       PeerConnectionFactory.startInternalTracingCapture(
           Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator
           + "webrtc-trace.txt");
     }
     Log.d(TAG,
         "Create peer connection factory. Use video: " + peerConnectionParameters.videoCallEnabled);
     isError = false;
 
     // Initialize field trials.
+    String fieldTrials = "";
     if (peerConnectionParameters.videoFlexfecEnabled) {
-      PeerConnectionFactory.initializeFieldTrials(VIDEO_FLEXFEC_FIELDTRIAL);
+      fieldTrials += VIDEO_FLEXFEC_FIELDTRIAL;
       Log.d(TAG, "Enable FlexFEC field trial.");
-    } else {
-      PeerConnectionFactory.initializeFieldTrials("");
     }
+    fieldTrials += VIDEO_VP8_INTEL_HW_ENCODER_FIELDTRIAL;
+    PeerConnectionFactory.initializeFieldTrials(fieldTrials);
 
     // Check preferred video codec.
     preferredVideoCodec = VIDEO_CODEC_VP8;
     if (videoCallEnabled && peerConnectionParameters.videoCodec != null) {
       if (peerConnectionParameters.videoCodec.equals(VIDEO_CODEC_VP9)) {
         preferredVideoCodec = VIDEO_CODEC_VP9;
       } else if (peerConnectionParameters.videoCodec.equals(VIDEO_CODEC_H264)) {
         preferredVideoCodec = VIDEO_CODEC_H264;
       }
     }
@@ skipping 864 matching lines @@
     public void onCreateFailure(final String error) {
       reportError("createSDP error: " + error);
     }
 
     @Override
     public void onSetFailure(final String error) {
       reportError("setSDP error: " + error);
     }
   }
 }