session-android/src/org/thoughtcrime/securesms/webrtc/audio/OutgoingRinger.java

package org.thoughtcrime.securesms.webrtc.audio;

import android.content.Context;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.net.Uri;
import android.support.annotation.NonNull;
import org.thoughtcrime.securesms.logging.Log;

import org.thoughtcrime.securesms.R;

import java.io.IOException;

public class OutgoingRinger {

  private static final String TAG = OutgoingRinger.class.getSimpleName();

  public enum Type {
    SONAR,
    RINGING,
    BUSY
  }

  private final Context context;

  private MediaPlayer mediaPlayer;

  public OutgoingRinger(@NonNull Context context) {
    this.context        = context;
  }
  
  public void start(Type type) {
    int soundId;

    if      (type == Type.SONAR)   soundId = R.raw.redphone_sonarping;
    else if (type == Type.RINGING) soundId = R.raw.redphone_outring;
    else if (type == Type.BUSY)    soundId = R.raw.redphone_busy;
    else throw new IllegalArgumentException("Not a valid sound type");

    if( mediaPlayer != null ) {
      mediaPlayer.release();
    }

    mediaPlayer = new MediaPlayer();
    mediaPlayer.setAudioStreamType(AudioManager.STREAM_VOICE_CALL);
    mediaPlayer.setLooping(true);

    String packageName = context.getPackageName();
    Uri    dataUri     = Uri.parse("android.resource://" + packageName + "/" + soundId);

    try {
      mediaPlayer.setDataSource(context, dataUri);
      mediaPlayer.prepare();
      mediaPlayer.start();
    } catch (IllegalArgumentException | SecurityException | IllegalStateException | IOException e) {
      Log.w(TAG, e);
    }
  }

  public void stop() {
    if (mediaPlayer == null) return;
    mediaPlayer.release();
    mediaPlayer = null;
  }
}