I'm trying to modify code from this thread:

http://processing.org/discourse/yabb_beta/YaBB.cgi?board=Sound;action=display;num=1174169711


I want to be able to preview what is going on without rendering it down to images.

I need something that says something like OUTPUT_TYPE_MUSIC.

This seems really simple, but I just can't figure it out.




/**
FFTOfflineRenderer.pde
May 2007 Dave Bollinger
to demonstrate use of non-real-time fft analysis and rendering
putting ESS, OpenGL and MovieMaker all together to make sure they all get along
*/

import processing.opengl.*;
import krister.Ess.*;
import processing.video.*;

static final int OUTPUT_TYPE_IMAGE = 0;
static final int OUTPUT_TYPE_MOVIE = 1;
int outputType = OUTPUT_TYPE_IMAGE;  // change this as desired

MovieMaker mm;
AudioChannel chn;
FFT fft;
int frameNumber = 0;
int framesPerSecond = 30;

void setup() {
 size(320,240,OPENGL);
 Ess.start(this);
 if (outputType==OUTPUT_TYPE_MOVIE)
   mm = new MovieMaker(this,width,height,"output.mov",MovieMaker.RAW,MovieMaker.HIGH,framesP
erSecond);
 chn = new AudioChannel(dataPath("music.wav"));
 fft = new FFT(512);
 fft.limits();
}

public void stop() {
 Ess.stop();
 super.stop();
}

void draw() {
 progress();
 analyze();
 render();
 store();
 advance();
}

void progress() {
 if ((frameNumber%100) == 0) {
   println("Working on frame number " + frameNumber);
 }
}

void analyze() {
 int pos = (int)(frameNumber * chn.sampleRate / framesPerSecond);
 if (pos >= chn.size) {
   if (outputType==OUTPUT_TYPE_MOVIE)
mm.finish();
   exit();
 }
 fft.getSpectrum(chn.samples, pos);
}

void render() {
 background(255);
 fill(0);
 noStroke();
 for (int i=0; i<256; i++) {
   float sp = fft.spectrum[i];
   rect(32+i,230,1,-sp*220);
 }
 // (optional) pretend the rendering took a long time just as proof of concept...
 //try { Thread.sleep(100); } catch(InterruptedException e) {}
}

void store() {
 if (outputType==OUTPUT_TYPE_MOVIE) {
   loadPixels();
   mm.addFrame(pixels,width,height);
 } else {
   saveFrame("out\\img_"+nf(frameNumber,6)+".jpg");
 }
}

void advance() {
 frameNumber++;
}