Java Sound File sliceWav(InputStream is, long starttime, long duration)

Description

slice Wav

License

Open Source License

Declaration

public static byte[] sliceWav(InputStream is, long starttime, long duration)
        throws UnsupportedAudioFileException, IOException 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.UnsupportedAudioFileException;
import javax.sound.sampled.AudioFileFormat.Type;

public class Main {

    public static byte[] sliceWav(InputStream is, long starttime, long duration)
            throws UnsupportedAudioFileException, IOException {
        AudioInputStream sourceStream = AudioSystem.getAudioInputStream(is);
        AudioFormat format = sourceStream.getFormat();

        int bytesPerSecond = format.getFrameSize() * (int) format.getFrameRate();
        sourceStream.skip(starttime * bytesPerSecond / 1000);
        long framesOfAudioToCopy = duration * (int) format.getFrameRate() / 1000;
        if (duration == 0) {
            framesOfAudioToCopy = sourceStream.getFrameLength() * format.getFrameSize()
                    - starttime * bytesPerSecond / 1000;
        }/*from w ww . java2  s  . co m*/
        AudioInputStream shortenedStream = new AudioInputStream(is, format, framesOfAudioToCopy);
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        AudioSystem.write(shortenedStream, Type.WAVE, bos);
        // System.out.println("sliced WAV status - offset : " + (starttime *
        // bytesPerSecond / 1000) + " len : " + framesOfAudioToCopy);
        return bos.toByteArray();
    }
}

Related

1. durationMillis(String audioPath)
2. getAudioDuration(final URI wavFile)
3. getAudioDuration(final URI wavFile)