85 lines
2.0 KiB
Plaintext
85 lines
2.0 KiB
Plaintext
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/**
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* Time Displacement
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* by David Muth
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*
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* Keeps a buffer of video frames in memory and displays pixel rows
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* taken from consecutive frames distributed over the y-axis
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*/
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import processing.video.*;
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Capture video;
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int signal = 0;
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//the buffer for storing video frames
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ArrayList frames = new ArrayList();
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void setup() {
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size(640, 480);
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// This the default video input, see the GettingStartedCapture
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// example if it creates an error
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video = new Capture(this, width, height);
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// Start capturing the images from the camera
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video.start();
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}
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void captureEvent(Capture camera) {
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camera.read();
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// Copy the current video frame into an image, so it can be stored in the buffer
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PImage img = createImage(width, height, RGB);
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video.loadPixels();
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arrayCopy(video.pixels, img.pixels);
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frames.add(img);
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// Once there are enough frames, remove the oldest one when adding a new one
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if (frames.size() > height/4) {
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frames.remove(0);
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}
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}
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void draw() {
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// Set the image counter to 0
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int currentImage = 0;
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loadPixels();
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// Begin a loop for displaying pixel rows of 4 pixels height
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for (int y = 0; y < video.height; y+=4) {
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// Go through the frame buffer and pick an image, starting with the oldest one
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if (currentImage < frames.size()) {
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PImage img = (PImage)frames.get(currentImage);
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if (img != null) {
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img.loadPixels();
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// Put 4 rows of pixels on the screen
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for (int x = 0; x < video.width; x++) {
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pixels[x + y * width] = img.pixels[x + y * video.width];
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pixels[x + (y + 1) * width] = img.pixels[x + (y + 1) * video.width];
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pixels[x + (y + 2) * width] = img.pixels[x + (y + 2) * video.width];
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pixels[x + (y + 3) * width] = img.pixels[x + (y + 3) * video.width];
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}
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}
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// Increase the image counter
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currentImage++;
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} else {
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break;
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}
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}
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updatePixels();
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// For recording an image sequence
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//saveFrame("frame-####.jpg");
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}
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