added webcam buffer project

1 files changed, 58 insertions, 0 deletions

diff --git a/webcam_buffer/webcam_buffer.pde b/webcam_buffer/webcam_buffer.pde
new file mode 100644
index 0000000..83bd0e5
--- /dev/null
+++ b/webcam_buffer/webcam_buffer.pde
@@ -0,0 +1,58 @@
+import processing.video.*;
+
+Capture c;
+VideoBuffer vb;
+
+void setup() 
+{
+  size(200, 200);
+  c = new Capture(this, width, height, 30);
+  vb = new VideoBuffer(30, width, height);
+}
+
+void captureEvent(Capture c)
+{
+  c.read();
+  if (vb != null)
+    vb.addFrame(c);
+}
+
+void draw()
+{
+  image(vb.getFrame(), 0, 0);
+}
+
+class VideoBuffer
+{
+  PImage[] b;
+  int s;
+  int w;
+  int h;
+  int cur;
+  
+  VideoBuffer(int s, int w, int h)
+  {
+    this.b = new PImage[s];
+    for (int i=0; i<s; i++) {
+      this.b[i] = new PImage(w, h);
+    }
+    this.s = s;
+    this.w = w;
+    this.h = h;
+  }
+  
+  void addFrame(PImage f)
+  {
+    System.arraycopy(f.pixels, 0, b[cur].pixels, 0, w * h);
+    b[cur].updatePixels();
+    cur = (cur + 1) % s;
+  }
+  
+  PImage getFrame()
+  {
+    int i = int(random(s));
+    //int i = cur - 1;
+    //i = i < 0 ? 0 : i;
+    return b[i];
+  }
+}