Android Open Source - geocamTalkAndroid Audio Player

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License

The source code is released under:

NASA OPEN SOURCE AGREEMENT VERSION 1.3 THIS OPEN SOURCE AGREEMENT ("AGREEMENT") DEFINES THE RIGHTS OF USE, REPRODUCTION, DISTRIBUTION, MODIFICATION AND REDISTRIBUTION OF CERTAIN COMPUTER SOFTWARE ORI...

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Java Source Code

// __BEGIN_LICENSE__
// Copyright (C) 2008-2010 United States Government as represented by
// the Administrator of the National Aeronautics and Space Administration.
// All Rights Reserved.
// __END_LICENSE__
/*  ww  w. j a  va2  s. c  o  m*/
package gov.nasa.arc.geocam.talk.service;


import gov.nasa.arc.geocam.talk.R;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import android.content.Context;
import android.media.MediaPlayer;
import android.speech.tts.TextToSpeech;
import android.speech.tts.TextToSpeech.OnInitListener;
import android.speech.tts.TextToSpeech.OnUtteranceCompletedListener;
import android.util.Log;

import com.google.inject.Inject;

/**
 * Implementation of the {@link IAudioPlayer} interface.
 */
public class AudioPlayer implements IAudioPlayer, OnInitListener, OnUtteranceCompletedListener{

  /** The context. */
  Context context;
  
  /** The player. */
  MediaPlayer player;
  
  /**
   * Instantiates a new audio player.
   *
   * @param context the context
   */
  @Inject
  public AudioPlayer(Context context)
  {
    player = new MediaPlayer();
    this.context = context;
  }
  
  /* (non-Javadoc)
   * @see gov.nasa.arc.geocam.talk.service.IAudioPlayer#startPlaying(java.lang.String)
   */
  @Override
  public void startPlaying(String filename) throws IllegalArgumentException, IllegalStateException, IOException {
    if (player.isPlaying()) {
      player.stop();
    }
    player.reset();
    FileInputStream f = new FileInputStream(filename);
    player.setDataSource(f.getFD());
    player.prepare();
    player.start();
  }
  
  /* (non-Javadoc)
   * @see gov.nasa.arc.geocam.talk.service.IAudioPlayer#stopPlaying()
   */
  @Override
  public void stopPlaying() {
    player.stop();
    player.reset();
  }
  
  /* (non-Javadoc)
   * @see gov.nasa.arc.geocam.talk.service.IAudioPlayer#playBeepA()
   */
  @Override
  public void playBeepA() {
    MediaPlayer mp = MediaPlayer.create(context, R.raw.beep_a);
      mp.start();
  }

  /* (non-Javadoc)
   * @see gov.nasa.arc.geocam.talk.service.IAudioPlayer#playBeepB()
   */
  @Override
  public void playBeepB() {
    MediaPlayer mp = MediaPlayer.create(context, R.raw.beep_b);
      mp.start();
  }
  
  /* (non-Javadoc)
   * @see gov.nasa.arc.geocam.talk.service.IAudioPlayer#startPlaying(byte[])
   */
  @Override
  public void startPlaying(byte[] soundByte) throws IllegalArgumentException, IllegalStateException, IOException {
    startPlaying(bytesToFilename(soundByte));
  }

  /**
   * Writes a byte array to the filesystem and returns the filename as an MP4 file
   *
   * @param soundByte The audio file contents to be written
   * @return the name of the temporary mp4 file
   * @throws IOException Signals that an I/O exception has occurred.
   */
  private String bytesToFilename(byte[] soundByte) throws IOException
  {
    File tempAudio = File.createTempFile("tempAudioMessage", ".mp4", context.getFilesDir());
        //tempAudio.deleteOnExit();
        FileOutputStream fos = new FileOutputStream(tempAudio);
        fos.write(soundByte);
        fos.close();
        return tempAudio.getAbsolutePath();
  }
  
  /* (non-Javadoc)
   * @see gov.nasa.arc.geocam.talk.service.IAudioPlayer#startPlayingWithTtsIntro(java.lang.String, byte[])
   */
  @Override
  public void startPlayingWithTtsIntro(String intro, byte[] soundByte) {
    try {
      startPlayingWithTtsIntro(intro, bytesToFilename(soundByte));
    } catch (IOException e) {
      Log.e("Talk", "audio filewrite failed");
    }
  }
  
  /* (non-Javadoc)
   * @see gov.nasa.arc.geocam.talk.service.IAudioPlayer#startPlayingWithTtsIntro(java.lang.String, java.lang.String)
   */
  @Override
  public void startPlayingWithTtsIntro(String intro, String filename) {
    try {
      startPlaying(filename);
    } catch (Exception e) {
      Log.e("Talk", "Could not play audio");
    }
  }
  
  /* (non-Javadoc)
   * @see android.speech.tts.TextToSpeech.OnUtteranceCompletedListener#onUtteranceCompleted(java.lang.String)
   */
  @Override
  public void onUtteranceCompleted(String filename) {
    try {
      startPlaying(filename);
    } catch (Exception e) {
      Log.e("Talk", "Could not play audio");
    }
    Log.i("Talk", "Utterance receieved");
  }

  /* (non-Javadoc)
   * @see android.speech.tts.TextToSpeech.OnInitListener#onInit(int)
   */
  @Override
  public void onInit(int status) {
    if(status == TextToSpeech.SUCCESS)
    {
      //textToSpeechOk = true;
    }
  }

  /* (non-Javadoc)
   * @see gov.nasa.arc.geocam.talk.service.IAudioPlayer#speak(java.lang.String)
   */
  @Override
  public void speak(String text) {
    //mTts.speak(text, TextToSpeech.QUEUE_FLUSH, null);    
  }
}

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