More intelligent default behavior with speakerphone and wired headset

When video is enabled, speakerphone is now enabled unless
there's a wired headset.  If speakerphone is enabled and
a wired headset gets plugged in, speakerphone is disabled.
If video is enabled and a wired headset is removed, speakerphone
is enabled.

Fixes #6153
// FREEBIE

src/org/thoughtcrime/redphone/util/AudioUtils.java

@@ -1,6 +1,7 @@
 package org.thoughtcrime.redphone.util;
 
 import android.content.Context;
+import android.content.Intent;
 import android.media.AudioManager;
 import android.os.Build;
 import android.util.Log;
@@ -62,4 +63,12 @@ public class AudioUtils {
       return AudioManager.ACTION_SCO_AUDIO_STATE_CHANGED;
     }
   }
+
+  public static String getWiredHeadsetUpdateAction() {
+    if (Build.VERSION.SDK_INT >= 21) {
+      return AudioManager.ACTION_HEADSET_PLUG;
+    } else {
+      return Intent.ACTION_HEADSET_PLUG;
+    }
+  }
 }

src/org/thoughtcrime/securesms/WebRtcCallActivity.java

@@ -46,6 +46,7 @@ import org.thoughtcrime.securesms.push.SignalServiceNetworkAccess;
 import org.thoughtcrime.securesms.recipients.Recipient;
 import org.thoughtcrime.securesms.service.MessageRetrievalService;
 import org.thoughtcrime.securesms.service.WebRtcCallService;
+import org.thoughtcrime.securesms.util.ServiceUtil;
 import org.thoughtcrime.securesms.util.TextSecurePreferences;
 import org.thoughtcrime.securesms.util.ViewUtil;
 import org.whispersystems.libsignal.IdentityKey;
@@ -91,7 +92,9 @@ public class WebRtcCallActivity extends Activity {
     if (!networkAccess.isCensored(this)) MessageRetrievalService.registerActivityStarted(this);
     initializeScreenshotSecurity();
     EventBus.getDefault().registerSticky(this);
+
     registerBluetoothReceiver();
+    registerWiredHeadsetReceiver();
   }
 
   @Override
@@ -113,6 +116,7 @@ public class WebRtcCallActivity extends Activity {
     if (!networkAccess.isCensored(this)) MessageRetrievalService.registerActivityStopped(this);
     EventBus.getDefault().unregister(this);
     unregisterReceiver(bluetoothStateReceiver);
+    unregisterReceiver(wiredHeadsetStateReceiver);
   }
 
   @Override
@@ -149,7 +153,12 @@ public class WebRtcCallActivity extends Activity {
   }
 
   private void handleSetMuteVideo(boolean muted) {
-//    callScreen.setLocalVideoEnabled(!muted);
+    AudioManager audioManager = ServiceUtil.getAudioManager(this);
+
+    if (!muted && !audioManager.isWiredHeadsetOn() && !audioManager.isBluetoothScoOn()) {
+      AudioUtils.enableSpeakerphoneRouting(WebRtcCallActivity.this);
+      callScreen.notifyAudioRoutingChange();
+    }
 
     Intent intent = new Intent(this, WebRtcCallService.class);
     intent.setAction(WebRtcCallService.ACTION_SET_MUTE_VIDEO);
@@ -352,6 +361,27 @@ public class WebRtcCallActivity extends Activity {
     callScreen.notifyBluetoothChange();
   }
 
+  private void registerWiredHeadsetReceiver() {
+    IntentFilter filter = new IntentFilter();
+    filter.addAction(AudioUtils.getWiredHeadsetUpdateAction());
+    wiredHeadsetStateReceiver = new BroadcastReceiver() {
+      @Override
+      public void onReceive(Context context, Intent intent) {
+        int state = intent.getIntExtra("state", -1);
+
+        if (state == 0 && callScreen.isVideoEnabled()) {
+          AudioUtils.enableSpeakerphoneRouting(WebRtcCallActivity.this);
+          callScreen.notifyAudioRoutingChange();
+        } else if (state == 1) {
+          AudioUtils.enableDefaultRouting(WebRtcCallActivity.this);
+          callScreen.notifyAudioRoutingChange();
+        }
+
+      }
+    };
+    registerReceiver(wiredHeadsetStateReceiver, filter);
+  }
+
   private class AudioButtonListener implements WebRtcCallControls.AudioButtonListener {
     @Override
     public void onAudioChange(AudioUtils.AudioMode mode) {

src/org/thoughtcrime/securesms/components/webrtc/WebRtcCallControls.java

@@ -99,14 +99,14 @@ public class WebRtcCallControls extends LinearLayout {
     });
   }
 
-  public boolean isVideoMuted() {
-    return !videoMuteButton.isChecked();
-  }
-
   public void setAudioButtonListener(final AudioButtonListener listener) {
     audioButton.setListener(listener);
   }
 
+  public boolean isVideoEnabled() {
+    return videoMuteButton.isChecked();
+  }
+
   public void reset() {
     updateAudioButton();
     audioMuteButton.setChecked(false);

src/org/thoughtcrime/securesms/components/webrtc/WebRtcCallScreen.java

@@ -179,6 +179,10 @@ public class WebRtcCallScreen extends FrameLayout implements Recipient.Recipient
     this.controls.updateAudioButton();
   }
 
+  public void notifyAudioRoutingChange() {
+    this.controls.updateAudioButton();
+  }
+
   public void setLocalVideoEnabled(boolean enabled) {
     if (enabled && this.localRenderLayout.isHidden()) {
       this.localRenderLayout.setHidden(false);
@@ -199,6 +203,10 @@ public class WebRtcCallScreen extends FrameLayout implements Recipient.Recipient
     }
   }
 
+  public boolean isVideoEnabled() {
+    return controls.isVideoEnabled();
+  }
+
   private void initialize() {
     LayoutInflater inflater = (LayoutInflater)getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
     inflater.inflate(R.layout.webrtc_call_screen, this, true);