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Minim Frequency Variable
[0 Replies]
20-Mar-2011 08:36 AM
Forum:
Core Library Questions
What I want:
average video brightness to influence oscillator frequency.
Problem:
float freq = pixelBrightness;
sine.setFreq(pixelBrightness);
-will not overwrite:-
float pixelBrightness = 0;
Result:
Frequency stays 0, unless I manually change that value. But it should be effected by the "pixelBrightness"
import ddf.minim.*;
import ddf.minim.signals.*;
import processing.video.*;
Minim minim;
AudioOutput out;
SineWave sine;
float pixelBrightness = 0;
Capture video;
void setup()
{
size(640, 480, P3D);
minim = new Minim(this);
// get a line out from Minim, default bufferSize is 1024, default sample rate is 44100, bit depth is 16
out = minim.getLineOut(Minim.STEREO);
// create a sine wave Oscillator, set to 440 Hz, at 0.5 amplitude, sample rate from line out
sine = new SineWave(440, 0.5, out.sampleRate());
// set the portamento speed on the oscillator to 200 milliseconds
sine.portamento(100);
// add the oscillator to the line out
out.addSignal(sine);
// with portamento on the frequency will change smoothly
float freq = pixelBrightness;
sine.setFreq(pixelBrightness);
video = new Capture(this, width, height, 30);
}
void draw() {
if (video.available()) {
video.read();
image(video, 0, 0, width, height); // webcam activeren
int brightestX = 0; // X helderste pixel
int brightestY = 0; // Y helderste pixel
float brightestValue = 0;
// zoek naar helderste pixel
video.loadPixels();
int index = 0;
for (int y = 0; y < video.height; y++) {
for (int x = 0; x < video.width; x++) {
// Kleur pixel
int pixelValue = video.pixels[index];
// Helderheid pixel
pixelBrightness = brightness(pixelValue);
float prevPixelBrightness = 0;
float pixelAverage = (pixelBrightness / prevPixelBrightness);
prevPixelBrightness = pixelBrightness;
index++;
if (index == video.width || index == video.height){
println("Brightness and hertz " + pixelBrightness);
}
}
}
}
}
Thanks in advance for solving my noob question!
Thom
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