added minim poc

src/2023-06-21.festl_is/.gitignore

@@ -1 +1,2 @@
 video.mp4
+gits.mp4

src/2023-06-21.festl_is/Makefile

@@ -1,3 +1,6 @@
 
 test:
-	glslViewer main.frag video.mp4 -w 960 -h 540 --nocursor --fps30 
+	glslViewer main.frag video.mp4 -w 960 -h 540 -p 8881 --nocursor --fps30
+
+test-gits:
+	glslViewer main.frag gits.mp4 -w 960 -h 540 -p 8881 --nocursor --fps30

src/2023-06-21.festl_is/main.frag

@@ -9,15 +9,43 @@ uniform float u_time; // in seconds
 uniform float u_delta; // delta time between frames (in seconds)
 varying vec2 v_texcoord;
 
-// video in
+// video in - actually, this is just the first texture in. can be anything and is set from commandline.
 uniform sampler2D u_tex0;
 uniform vec2 u_tex0Resolution;
 
 
-// lygia effects
+// osc messages in, add `-p 8000 -l` to receive them.
+// their path just needs to match the name
+uniform float osc_val_1;
+uniform float osc_val_2;
+uniform float osc_val_3;
+
+
+// lygia effects import and setup
+// for some reason the -I flag doesn't do the right thing here
+// common imports:
+#include "../../lib/lygia/math/lerp.glsl"
+
+// effect: chromatic aberration
 #define CHROMAAB_TYPE vec4
 #include "../../lib/lygia/distort/chromaAB.glsl"
-//#include "sample/nearest.glsl"
+
+// effect: brightness-contrast
+#include "../../lib/lygia/color/exposure.glsl"
+
+// effect: dither
+#define FIND_CLOSER(new) (old = mix(new, old, step(length(old-ref), length(new-ref)))); 
+vec3 ditherBayerLut(vec3 ref) {  
+    vec3 old = vec3(1.0);
+    FIND_CLOSER(vec3(0.74));
+    FIND_CLOSER(vec3(0.47));
+    FIND_CLOSER(vec3(0.13));
+    FIND_CLOSER(vec3(0.05));
+    return old;
+}
+#include "../../lib/lygia/sample/dither.glsl"
+
+
 
 void main() {
     // common setup
@@ -26,17 +54,22 @@ void main() {
     vec2 st = gl_FragCoord.xy * pixel; // 0-1
     vec2 uv = v_texcoord;
 
-    // set video
+    // read input texture
     color = texture2D(u_tex0, st, 1.0);
-
-
-    // chromatic aberration
-    color = chromaAB(u_tex0, uv);
     
-    //color.rgb = mix(texture2D(u_tex0, uv).rgb, 
-     //               sampleNearest(u_tex0, uv, u_tex0Resolution).rgb, 
-      //              step(0.5, st.x));
+    // effect: dither
+    vec4 fx_dither = vec4(sampleDither(u_tex0, uv, u_resolution * 1.0), 1.0);
+    float fx_dither_amount = .0;
+    color = lerp(color, fx_dither, fx_dither_amount);
 
+    // effect: chromatic aberration
+    vec4 fx_chroma = chromaAB(u_tex0, uv);
+    float fx_chroma_amount = .0;
+    color = lerp(color, fx_chroma, fx_chroma_amount);
+   
+    // effect: exposure
+    float exposure = osc_val_1;
+    color = exposure(color,exposure);
 
     // actually set color
     gl_FragColor = color;

src/2023-06-21.festl_is/processing_sketches/test_minim_SoundEnergyBeatDetection/test_minim_SoundEnergyBeatDetection.pde

@@ -0,0 +1,58 @@
+/**
+  * This sketch demonstrates how to use the BeatDetect object song SOUND_ENERGY mode.<br />
+  * You must call <code>detect</code> every frame and then you can use <code>isOnset</code>
+  * to track the beat of the music.
+  * <p>
+  * This sketch plays an entire song, so it may be a little slow to load.
+  * <p>
+  * For more information about Minim and additional features, 
+  * visit http://code.compartmental.net/minim/
+  */
+  
+import ddf.minim.*;
+import ddf.minim.analysis.*;
+
+import oscP5.*;
+import netP5.*;
+OscP5 oscP5;
+NetAddress remoteLoc;
+
+Minim minim;
+AudioInput audioIn;
+BeatDetect beat;
+
+float eRadius;
+
+void setup()
+{
+  size(200, 200, P3D);
+  minim = new Minim(this);
+  audioIn = minim.getLineIn();
+
+  // a beat detection object song SOUND_ENERGY mode with a sensitivity of 10 milliseconds
+  beat = new BeatDetect();
+  
+  ellipseMode(RADIUS);
+  eRadius = 20;
+  
+  oscP5 = new OscP5(this, 12000);
+  remoteLoc = new NetAddress("127.0.0.1",8881);
+}
+
+void draw()
+{
+  background(0);
+  beat.detect(audioIn.mix);
+  float a = map(eRadius, 20, 80, 60, 255);
+  fill(60, 255, 0, a);
+  if ( beat.isOnset() ) eRadius = 80;
+  ellipse(width/2, height/2, eRadius, eRadius);
+  eRadius *= 0.95;
+  if ( eRadius < 20 ) eRadius = 20;
+  if(frameCount % 5 == 0) {
+    OscMessage msg = new OscMessage("/osc_val_1");
+    float x = map(eRadius,20,80,0.2,1.2);
+    msg.add(x); //<>//
+    oscP5.send(msg, remoteLoc);
+  }
+}