Android Open Source - SMS-Morse S M S Tone

• Back to SMS/message  ↑

From Project

Back to project page SMS-Morse.

License

The source code is released under:

GNU General Public License

Java Source Code

package com.jonathanmackenzie.sms_morse;
import android.content.Context;
import android.content.SharedPreferences;
import android.media.AudioTrack;
import android.media.AudioTrack.OnPlaybackPositionUpdateListener;
import android.preference.PreferenceManager;
import android.util.Log;
import android.util.SparseArray;
/*ww w  .  j  av a 2 s .co  m*/
/**
 * The SMSTone
 * @author Jonathan Mackenzie
 * @email jonmac1@gmail.com
 */
public class SMSTone {

  private static AudioGenerator audioGenerator = new AudioGenerator(8000);
  private static final String TAG = SMSTone.class.getSimpleName(); 
  public static final SparseArray<String> morseTable = new SparseArray<String>(64);
  private int unit =800;
  private int frequency = 800;
  /**
   * The table to convert from char to
   * morse code dots
   */
  static {
    morseTable.put('a', ".-");
    morseTable.put('b', "-...");
    morseTable.put('c', "-.-.");
    morseTable.put('d', "-..");
    morseTable.put('e', ".");
    morseTable.put('f', "..-.");
    morseTable.put('g', "--.");
    morseTable.put('h', "....");
    morseTable.put('i', "..");
    morseTable.put('j', ".---");
    morseTable.put('k', "-.-");
    morseTable.put('l', ".-..");
    morseTable.put('m', "--");
    morseTable.put('n', "-.");
    morseTable.put('o', "---");
    morseTable.put('p', ".--.");
    morseTable.put('q', "--.-");
    morseTable.put('r', ".-.");
    morseTable.put('s', "...");
    morseTable.put('t', "-");
    morseTable.put('u', "..-");
    morseTable.put('v', "...-");
    morseTable.put('w', ".--");
    morseTable.put('x', "-..-");
    morseTable.put('y', "-.--");
    morseTable.put('z', "--..");
    morseTable.put('1', ".----");
    morseTable.put('2', "..---");
    morseTable.put('3', "...--");
    morseTable.put('4', "....-");
    morseTable.put('5', ".....");
    morseTable.put('6', "-....");
    morseTable.put('7', "--...");
    morseTable.put('8', "---..");
    morseTable.put('9', "----.");
    morseTable.put('0', "-----");
    morseTable.put('.', ".-.-.-");
    morseTable.put(',', "-..--");
    morseTable.put('?', "..--..");
    morseTable.put('/', "-..-.");
    morseTable.put('\'', ".----.");
    morseTable.put('!', "-.-.--");
    morseTable.put('(', "-.--.");
    morseTable.put(')', "-.--.-");
    morseTable.put('&', ".-...");
    morseTable.put(':', "---...");
    morseTable.put(';', "-.-.-.");
    morseTable.put('=', "-...-");
    morseTable.put('+', ".-.-.");
    morseTable.put('-', "-....-");
    morseTable.put('_', "..--.-");
    morseTable.put('\"', ".-..-.");
    morseTable.put('$', "...-..-");
    morseTable.put('@', ".--.-.");  
    morseTable.put('',".--.-");
    morseTable.put('',".-.-");
    morseTable.put('',".--.-");
    morseTable.put('',".-.-");
    morseTable.put('?',"-.-..");
    morseTable.put('?',"-.-..");
    morseTable.put('',"-.-..");
    morseTable.put('?',"..-..");
    morseTable.put('',"..--.");
    morseTable.put('',"..-..");
    morseTable.put('',".-..-");
    morseTable.put('?',"..-..");
    morseTable.put('??',"--.-.");
    morseTable.put('?',"----");
    morseTable.put('?',".---.");
    morseTable.put('?',".-..-");
    morseTable.put('?',"--.--");
    morseTable.put('',"--.--");
    morseTable.put('',"---.");
    morseTable.put('',"---.");
    morseTable.put('',"---.");
    morseTable.put('?',"...-...");
    morseTable.put('??',"...-.");
    morseTable.put('',"----");
    morseTable.put('',".--..");
    morseTable.put('',"..--");
    morseTable.put('?',"..--");
    morseTable.put('?',"--..-.");
    morseTable.put('?',"--..-");
    
  }
  /**
   * Create an SMS tone, the length and frequency of each tone
   * is taken from SharedPreferences
   * @param context
   */
  public SMSTone(Context context) {
    SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(context);
    unit = Integer.parseInt(settings.getString("morse_code_speed","800"));
    frequency = Integer.parseInt(settings.getString("morse_code_frequency","800"));
    Log.i(TAG,"Frequency is: "+frequency+ " tick is:"+unit);
  }
  /**
   * Play silence for u units
   * @param u the number of units to play the silence for
   */
  private void silenceUnit(int u) {
    audioGenerator.writeSound(new double[unit*u]);
  }
  /**
   * Play a sound for u units,
   * @param u the number of units to play the tone for
   */
  private void ditUnit(int u) {
    audioGenerator.writeSound(audioGenerator.getSineWave(unit*u, frequency));
  }
  /**
   * Convert a character string to morse code format
   * @param message
   * @return the encoded string
   */
  public String convertToDots(String message) {
    StringBuilder sb = new StringBuilder();
    for (char i: message.toLowerCase().toCharArray()) {
      String morsed = morseTable.get(i);
      if(morsed != null) {
        sb.append(morsed+"|");
      } else {
        sb.append(" ");
      }
    }
    return sb.toString();
  }
  /**
   * Plays a morse encoded string with | indicating end of 
   * character. Unknown characters will not be played
   * @param dots the dots to play
   */
  public void play(String dots) {
    dots = dots.replace("| ", " ");
    dots = "|"+dots+"|";
    Log.i(TAG,"Playing sequence: "+dots);
    audioGenerator.createPlayer();
    audioGenerator.getAudioTrack().setNotificationMarkerPosition(countFrames(dots));
    audioGenerator.getAudioTrack().setPlaybackPositionUpdateListener(new OnPlaybackPositionUpdateListener() {
      
      @Override
      public void onPeriodicNotification(AudioTrack track) {
      }
      
      @Override
      public void onMarkerReached(AudioTrack track) {
        stopTone();
      }
    });
    
    char[] chars = dots.toCharArray();
    for (int i = 0; i < chars.length; i++) {
      char c = chars[i];
      if(c=='.' || c == '') {
        //Play a dit
        ditUnit(1);
        silenceUnit(1);
      } else if(c=='-'){
        // play a dash
        ditUnit(3);
        silenceUnit(1);
      } else if(c == '|') {
        // end of character
        silenceUnit(2);      
      } else if(c == ' ') {
        // end of word
        silenceUnit(6);
      }
    }
    
    
  }
  private int countFrames(String dots) {
    int count = 0;
    for (int i = 0; i < dots.length(); i++) {
      switch(dots.charAt(i)) {
      case '-':
        count += unit*2;
      case '.':
      case '':
      case '|':
        count += unit*2;
        break;
      case  ' ':
        count += unit*6;
        default:
      }
    }
    return count;
  }
  /**
   * Stop the tone from being played
   */
  public void stopTone() {
    audioGenerator.destroyAudioTrack();
  }

}

Java Source Code List

• Back to SMS/message  ↑