apcs/ShortAudioFilePlayer.java


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96

package apcs;
//Java program to play audio files. imports file scanning and various 
//methods from the java audio class in order to do so.
import java.io.File;
import java.io.IOException;
 
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineEvent;
import javax.sound.sampled.LineListener;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.UnsupportedAudioFileException;

public class AudioFilePlayer implements LineListener
{
    //indicates whether the playback completes or not
    boolean playCompleted;
    Clip audioClip;
    
    public void play(String audioFilePath)
    {
        File audioFile = new File(audioFilePath);
        
        try
        {
            //creates an audioInput object using the file we
            //declared earlier
            AudioInputStream audioStream = AudioSystem.getAudioInputStream(audioFile);
            
            //gets the format of the audioStream object
            AudioFormat format = audioStream.getFormat();
            
            DataLine.Info info = new DataLine.Info(Clip.class, format);
            
            audioClip = (Clip) AudioSystem.getLine(info);
 
            audioClip.addLineListener(this);
 
            audioClip.open(audioStream);
             
            audioClip.start();
             
            while (!playCompleted) 
            {
                // wait for the playback to complete
                try 
                {
                    Thread.sleep(1000);
                } 
                catch (InterruptedException ex) 
                {
                    ex.printStackTrace();
                }
            }    
            audioClip.close(); //stops the audio clip  
        }
        catch (UnsupportedAudioFileException ex) 
        {
            System.out.println("The specified audio file is not supported.");
            ex.printStackTrace();
        }
        catch (LineUnavailableException ex) 
        {
            System.out.println("Audio line for playing back is unavailable.");
            ex.printStackTrace();
        } 
        catch (IOException ex) 
        {
            System.out.println("Error playing the audio file.");
            ex.printStackTrace();
        }
    }
    
    
    /**
     * Listens to the START and STOP events of the audio line.
     */
    @Override
    public void update(LineEvent event) 
    {
        LineEvent.Type type = event.getType();
         
        if (type == LineEvent.Type.START) 
        {
            System.out.println("Playback started.");        
        } 
        else if (type == LineEvent.Type.STOP) 
        {
            playCompleted = true;
            System.out.println("Playback completed.");
        }
    }   
}