Java AudioInputStream how to support skip with negative number of bytes

Question

I am trying to skip a negative number of bytes with AudioInputStream skip(long bytes) method .

The problem is trying to (let\'s say a small nu

Answer 1

You can create your own buffer, It could be ByteArrayOutputStream but that is a bloated thing - always gives me Out of memory after a couple of minutes - or have your own Vector or other ArrayList.

I tried with a 10 min .wav file and it runs fine - as far as playing and adding the bytes to the buffer.

e.g.

Vector v=new Vector();
byte[] data=new byte[basicU];
while(true) {
  k=audioInputStream.read(data, 0, data.length);
  v.add(data);
  if(k<0) break;
  tot+=k;
}

--

Here is my method for playing a file with seeks. I have a thread for generating seek signals. The problem is complicated when we have multiple seeks. I use a variable K to check whether we need to add data to the buffer. I don't use skip but normal read; just don't play it in the line.

public void play() {
  boolean seekingBack=false;
  int i, j, k=0, seekPos=0, basicU=1024;
  AudioFormat targetFormat=null;
  int tot=0;
        new Thread() {
          public void run() {
            while(true) {
              numBytes=(Math.random()>0.5?1:-1)*500000;
              try { Thread.sleep(5000); } catch (Exception e) {} 
              seekSignal=true;
            }
          }}.start();
      try {
      File fileIn=new File("........");
        AudioInputStream audioInputStream=AudioSystem.getAudioInputStream(fileIn);
        targetFormat=audioInputStream.getFormat();
        DataLine.Info dinfo=new DataLine.Info(SourceDataLine.class, targetFormat);
        SourceDataLine line=null;
        line=(SourceDataLine)AudioSystem.getLine(dinfo);
        if(line==null) return;
        line.open(targetFormat);
        line.start();
        Vector v=new Vector();
        byte[] data=new byte[basicU];
        int K=0;
        while(true) {
          if(seekingBack) { // seeking backwards
            K=seekPos;
            k=data.length;
            for(j=0; jv.size()-1) seekingBack=false;
          }
          else { // normal playing
            k=audioInputStream.read(data, 0, data.length);
            if(k<0) break;
            line.write(data, 0, k);
            if(K>=v.size()) for(j=0; j0) {
                  k=audioInputStream.read(data, 0, data.length);
                  if(k<0) break;
                  if(K>=v.size()) for(j=0; j=0) { // forward
                while(numBytes>0) {
                  k=audioInputStream.read(data, 0, data.length);
                  if(k<0) break;
                  if(K>=v.size()) for(j=0; j