Java - přehrání hudby wav a mp3 v javě

Kód pro přehrání hudby v jazyce Java. Dva různé postupy jak přehrát v jazyce java hudbu. Tzn. pro přehrávání Wav není potřeba si prilinkovat knihovnu k projektu.

Instalace

Je potřeba ke kódu si nainstalovat, Java Layout. Tím doplníme chybějící třídy se kterými budu v kódu pracovat. Je to konkrétně Java Layer od JavaZoom. Nebo lze také stáhnout přímo zde (je možné že ne zcela poslední verzi) jl1[1].0.zip.

Spuštění Wav souboru

Main

package test_mp3;

import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import javax.swing.*;
import java.awt.event.ActionListener;

import javax.sound.sampled.*;
import java.io.*;

public class Main extends JDialog implements ActionListener
{

JButton tl1 = new JButton("Konec");
    JButton tl2 = new JButton("testWav");
    public Main()
    {
        super();
        setSize(500, 500);
        
        tl1.setSize(150, 150);
        tl2.setSize(150, 150);
        tl1.addActionListener(this);
        tl2.addActionListener(this);
        getContentPane().add(tl1);
        getContentPane().add(tl2);
        getContentPane().setLayout(new FlowLayout());
        
        
        
        setVisible(true);
        
    }
    
    public void Prehrat()
    {
        
    }
    public static void main(String[] args) {
        Main f = new Main();
    }

public void actionPerformed(ActionEvent e) {
        
        if( e.getActionCommand().equalsIgnoreCase("konec") )
        {
            System.exit(0);
        }
        if( e.getActionCommand().equalsIgnoreCase("testWav") )
        {
            
            System.out.print("zkusim prehat");
            SimpleSoundPlayer sound = new SimpleSoundPlayer("d:/java/win.wav");
            InputStream stream = new ByteArrayInputStream(sound.getSamples());
            sound.play(stream);

}
        if( e.getActionCommand().equalsIgnoreCase("testMP3") )
        {
            
            System.out.print("zkusim prehat");
            SimpleSoundPlayer sound = new SimpleSoundPlayer("d:/java/win.wav");
            InputStream stream = new ByteArrayInputStream(sound.getSamples());
            sound.play(stream);

}
     }
}

SimpleSoundPlayer

package test_mp3;

import javax.sound.sampled.*;
import java.io.*;

public class SimpleSoundPlayer {
    
     private AudioFormat format;
    private byte[] samples;
    
   
    public SimpleSoundPlayer(String aFilename)
    {
        try
        {
            AudioInputStream stream = AudioSystem.getAudioInputStream( new File(aFilename));
            format = stream.getFormat();
            samples = getSamples(stream);
        }
        catch(UnsupportedAudioFileException ex)
        {
            ex.printStackTrace();
        }
        catch( IOException ex)
        {
            ex.printStackTrace();
        }
    }

public byte[] getSamples() {
        return samples;
    }

public byte[] getSamples(AudioInputStream audioStream) {
        int lenght = (int) (audioStream.getFrameLength() * format.getFrameSize());
        byte[] samples = new byte[lenght];
        DataInputStream is = new DataInputStream(audioStream);
        try
        {
            is.readFully(samples);
        }
        catch(IOException e)
        {
            e.printStackTrace();
        }
        return samples;
        
    }
    
    public void play(InputStream source)
    {
        int bufferSize = format.getFrameSize() * Math.round(format.getSampleRate() / 10);
        byte[] buffer = new byte[bufferSize];
        SourceDataLine line;
        try
        {
            DataLine.Info info = new DataLine.Info(SourceDataLine.class,format);
            line = (SourceDataLine)AudioSystem.getLine(info);
            line.open(format,bufferSize);
        }
        catch( LineUnavailableException e )
        {
            e.printStackTrace();
            return;
        }
        line.start();
        try
        {
            int numBytesRead = 0;
            while(numBytesRead != -1)
            {
                numBytesRead = source.read(buffer,0,buffer.length);
                if(numBytesRead != -1)
                {
                    line.write(buffer, 0, numBytesRead);
                }
            }
        }
            catch( IOException e )
            {
                e.printStackTrace();
            }
            line.drain();
            line.close();
        
    }

}

Spuštění mp3 souboru

Pro přehrání mp3 souboru je nutné si přilinkovat k projektu Java Layer. Ten lze stáhnout z http://www.cs.utexas.edu/~richcar/JavaLayers.html.
A nyní přehrajeme mp3.

Main

package test_mp3;

import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import javax.swing.*;
import java.awt.event.ActionListener;

import javax.sound.sampled.*;
import java.io.*;

import javazoom.jl.player.Player;

public class Main extends JDialog implements ActionListener
{

JButton tl1 = new JButton("Konec");
    JButton tl2 = new JButton("testWav");
    JButton tl3 = new JButton("testMP3");
    public Main()
    {
        super();
        setSize(500, 500);
        
        tl1.setSize(150, 150);
        tl2.setSize(150, 150);
        tl3.setSize(150, 150);
        tl1.addActionListener(this);
        tl2.addActionListener(this);
        tl3.addActionListener(this);
        getContentPane().add(tl1);
        getContentPane().add(tl2);
        getContentPane().add(tl3);
        getContentPane().setLayout(new FlowLayout());
        
        
        
        setVisible(true);
        
    }
    
    public void Prehrat()
    {
        
    }
    public static void main(String[] args) {
        Main f = new Main();
    }

public void actionPerformed(ActionEvent e) {
        
        if( e.getActionCommand().equalsIgnoreCase("konec") )
        {
            System.exit(0);
        }
        if( e.getActionCommand().equalsIgnoreCase("test") )
        {
            
            System.out.print("zkusim prehat");
            SimpleSoundPlayer sound = new SimpleSoundPlayer("d:/java/win.wav");
            InputStream stream = new ByteArrayInputStream(sound.getSamples());
            sound.play(stream);

}
        if( e.getActionCommand().equalsIgnoreCase("testMP3") )
        {
           
            String filename = "d:/java/01.mp3";
            MP3 mp3 = new MP3(filename);
            mp3.play();

/*
//pokud chci prehrat pouze cast useku
        
        // do whatever computation you like, while music plays
        int N = 4000;
        double sum = 0.0;
        for (int i = 0; i < N; i++) {
            for (int j = 0; j < N; j++) {
                sum += Math.sin(i + j);
            }
        }
        
        System.out.println(sum);

// when the computation is done, stop playing it
        mp3.close();

// play from the beginning
        mp3 = new MP3(filename);
        mp3.play();
        
         * */

}
     }
}

MP3

package test_mp3;

import java.io.BufferedInputStream;
import java.io.FileInputStream;
import javazoom.jl.player.Player;

public class MP3 {
private String filename;
    private Player player;

// constructor that takes the name of an MP3 file
    public MP3(String filename) {
        this.filename = filename;
    }

public void close() { if (player != null) player.close(); }

// play the MP3 file to the sound card
    public void play() {
        try {
            FileInputStream fis     = new FileInputStream(filename);
            BufferedInputStream bis = new BufferedInputStream(fis);
            player = new Player(bis);
        }
        catch (Exception e) {
            System.out.println("Problem playing file " + filename);
            System.out.println(e);
        }

// run in new thread to play in background
        new Thread() {
            public void run() {
                try { player.play(); }
                catch (Exception e) { System.out.println(e); }
            }
        }.start();

}

Source

Zdrojový kód si můžete stáhnout zde pro NetBeans.

18.08.2008 - Mlok -