Add an option to enable level control to Android AppRTC Demo.

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 62 matching lines @@
   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 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 MAX_VIDEO_WIDTH_CONSTRAINT = "maxWidth";
   private static final String MIN_VIDEO_WIDTH_CONSTRAINT = "minWidth";
   private static final String MAX_VIDEO_HEIGHT_CONSTRAINT = "maxHeight";
   private static final String MIN_VIDEO_HEIGHT_CONSTRAINT = "minHeight";
   private static final String MAX_VIDEO_FPS_CONSTRAINT = "maxFrameRate";
   private static final String MIN_VIDEO_FPS_CONSTRAINT = "minFrameRate";
   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 MAX_VIDEO_WIDTH = 1280;
@@ skipping 62 matching lines @@
     public final boolean videoCodecHwAcceleration;
     public final boolean captureToTexture;
     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;
 
     public PeerConnectionParameters(
         boolean videoCallEnabled, boolean loopback, boolean tracing, boolean useCamera2,
         int videoWidth, int videoHeight, int videoFps,
         int videoStartBitrate, String videoCodec, boolean videoCodecHwAcceleration,
         boolean captureToTexture, int audioStartBitrate, String audioCodec,
         boolean noAudioProcessing, boolean aecDump, boolean useOpenSLES,
-        boolean disableBuiltInAEC, boolean disableBuiltInAGC, boolean disableBuiltInNS) {
+        boolean disableBuiltInAEC, boolean disableBuiltInAGC, boolean disableBuiltInNS,
+        boolean enableLevelControl) {
       this.videoCallEnabled = videoCallEnabled;
       this.useCamera2 = useCamera2;
       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;
       this.aecDump = aecDump;
       this.useOpenSLES = useOpenSLES;
       this.disableBuiltInAEC = disableBuiltInAEC;
       this.disableBuiltInAGC = disableBuiltInAGC;
       this.disableBuiltInNS = disableBuiltInNS;
+      this.enableLevelControl = enableLevelControl;
     }
   }
 
   /**
    * Peer connection events.
    */
   public interface PeerConnectionEvents {
     /**
      * Callback fired once local SDP is created and set.
      */
@@ skipping 246 matching lines @@
       Log.d(TAG, "Disabling audio processing");
       audioConstraints.mandatory.add(new MediaConstraints.KeyValuePair(
             AUDIO_ECHO_CANCELLATION_CONSTRAINT, "false"));
       audioConstraints.mandatory.add(new MediaConstraints.KeyValuePair(
             AUDIO_AUTO_GAIN_CONTROL_CONSTRAINT, "false"));
       audioConstraints.mandatory.add(new MediaConstraints.KeyValuePair(
             AUDIO_HIGH_PASS_FILTER_CONSTRAINT, "false"));
       audioConstraints.mandatory.add(new MediaConstraints.KeyValuePair(
            AUDIO_NOISE_SUPPRESSION_CONSTRAINT , "false"));
     }
+    if (peerConnectionParameters.enableLevelControl) {
+      Log.d(TAG, "Enabling level control.");
+      audioConstraints.mandatory.add(new MediaConstraints.KeyValuePair(
+          AUDIO_LEVEL_CONTROL_CONSTRAINT, "true"));
+    }
     // Create SDP constraints.
     sdpMediaConstraints = new MediaConstraints();
     sdpMediaConstraints.mandatory.add(new MediaConstraints.KeyValuePair(
         "OfferToReceiveAudio", "true"));
     if (videoCallEnabled || peerConnectionParameters.loopback) {
       sdpMediaConstraints.mandatory.add(new MediaConstraints.KeyValuePair(
           "OfferToReceiveVideo", "true"));
     } else {
       sdpMediaConstraints.mandatory.add(new MediaConstraints.KeyValuePair(
           "OfferToReceiveVideo", "false"));
@@ skipping 721 matching lines @@
     public void onCreateFailure(final String error) {
       reportError("createSDP error: " + error);
     }
 
     @Override
     public void onSetFailure(final String error) {
       reportError("setSDP error: " + error);
     }
   }
 }