test/jdk/javax/sound/sampled/spi/AudioFileWriter/RIFFHeader.java

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 *
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;

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

/**
 * @test
 * @bug 4636355
 * @summary Check that RIFF headers are written with extra data length field.
 */
public class RIFFHeader {

    public static void main(String args[]) throws Exception {
        System.out.println();
        System.out.println();
        System.out.println("4636355: Check that RIFF headers are written with extra data length field.");
        byte[] fakedata=new byte[1234];
        MyByteArrayInputStream is = new MyByteArrayInputStream(fakedata);
        AudioFormat inFormat = new AudioFormat(AudioFormat.Encoding.ULAW, 8000, 8, 1, 1, 8000, true);

        AudioInputStream ais = new AudioInputStream((InputStream) is, inFormat, fakedata.length);
        ByteArrayOutputStream out = new ByteArrayOutputStream(1500);
        System.out.println("  ulaw data will be written as WAVE to stream...");
        int t = AudioSystem.write(ais, AudioFileFormat.Type.WAVE, out);
        byte[] writtenData = out.toByteArray();
        // now header must have at least 46 bytes
        System.out.println("  Length should be "+(fakedata.length+46)+" bytes: "+writtenData.length);
        // re-read this file
        is = new MyByteArrayInputStream(writtenData);
        System.out.println("  Get AudioFileFormat of written file");
        AudioFileFormat fileformat = AudioSystem.getAudioFileFormat(is);
        AudioFileFormat.Type type = fileformat.getType();
        System.out.println("  The file format type: "+type);
        if (fileformat.getFrameLength()!=fakedata.length
            && fileformat.getFrameLength()!=AudioSystem.NOT_SPECIFIED) {
            throw new Exception("The written file's frame length is "+fileformat.getFrameLength()+" but should be "+fakedata.length+" !");
        }
        ais = AudioSystem.getAudioInputStream(is);
        System.out.println("  Got Stream with format: "+ais.getFormat());
        if (is.getPos()<46) {
            throw new Exception("After reading the header, stream position must be at least 46, but is "+is.getPos()+" !");
        }
        System.out.println("  test passed.");
    }

    static class MyByteArrayInputStream extends ByteArrayInputStream {

        MyByteArrayInputStream(byte[] data) {
            super(data);
        }

        int getPos() {
            return pos;
        }
    }
}