Exemplo n.º 1
0
  /** Re-crunch the numbers to get new wave data. */
  public void recalculateBytes() {
    chan.setValues(vol.getValue(), freq.getValue(), dur.getValue(), eq.getText());
    int duration = (int) (dur.getValue() / 1000.0 * sps);

    myEnviron.put("sps", sps);
    myEnviron.put("bps", sps);
    myEnviron.put("dur", duration);
    myEnviron.put("period", sps / (double) freq.getValue());
    myEnviron.put("freq", freq.getValue());
    myEnviron.put("vol", vol.getValue());

    byte[] ret = new byte[duration];
    myEnviron.put("z", ret);
    String script = "function calc(x) { return " + eq.getText() + "; }";
    script += " for (i = 0; i < " + duration + "; i++) z[i] = calc(i); z;";
    try {
      ret = (byte[]) myEnviron.engine.eval(script);
    } catch (ScriptException e) {
      System.err.println(e.getMessage());
    }

    //		byte[] ret = new byte[duration];
    //		for (int i = 0; i < ret.length; i++)
    //		{
    //			ret[i] = (byte) (vol.getValue() * Math.sin(i / (sps / (double) freq.getValue()) * 2 *
    // Math.PI));
    //			//			ret[i] = (byte) eval(eq.getText(),"x=" + i + ", freq=" + freq.getValue() + ", vol="
    //			//					+ vol.getValue());
    //		}
    for (int i = 0; i < 100 && i < ret.length; i++) System.out.print(ret[i] + ", ");
    System.out.println();
    waveData = ret;
    if (renderPane != null) {
      renderPane.renew();
      renderPane.updateUI();
    }
  }
Exemplo n.º 2
0
 /**
  * Wrap to myEnviron.eval(), for convenience. Evaluates the given expression via our math engine.
  *
  * @param expression The expression to evaluate.
  * @return The value gleaned from the given expression.
  */
 static double eval(String expression) {
   // FIXME: Recasting from 'Double' to 'double' to 'Double' to 'double'?
   return (Double) myEnviron.eval(expression);
 }