4 Replies Latest reply on Apr 5, 2010 4:36 PM by 843802

    Cannot close TargetDataLine on OS X Snow Leopard


      I've written a program to record audio from the mic input and write the data to a file. The sound records and writes to the file as expected. The problem is I cannot stop the TargetDataLine by stopping or closing the line without the program crashing. The code runs fine on windows, but not on snow leopard.

      If I call TargetDataLine.close() or TargetDataLine.stop(), the program crashes and I get the error:

      java(1305,0x100501000) malloc: *** error for object 0xaa03: pointer being freed was not allocated
      *** set a breakpoint in malloc_error_break to debug
      Java Result: 134

      This looks to be an os x bug.

      The code runs in a thread. From outside the thread I call stop() and close() on the reference to the targetDataLine. If I just call stop it crashes, if I just call close it crashes, if I call stop and then close it crashes.
      public void run(){
           AudioFormat audioFormat = new AudioFormat(44100, 16, 1, true, false);
                targetDataLine = AudioSystem.getTargetDataLine(audioFormat);
                audioInputStream  = new AudioInputStream(targetDataLine);
                File outputFile = new File(outputFileName);
      /* this line blocks and reads audio from the mic to the wave file until the targetDataLine is closed */
                AudioSystem.write(audioInputStream, Type.WAVE, outputFile);
           catch(LineUnavailableException e){
           catch(IOException e){
           System.out.println("done recording");
      I have also tried just closing the audioInputStream, which also results in the same crash and error.

      Hopefully someone can shed some light on this.