1 files changed, 82 insertions, 0 deletions
diff --git a/Plugins/sonogram.cpp b/Plugins/sonogram.cpp
new file mode 100644
index 0000000..821b94a
--- /dev/null
+++ b/Plugins/sonogram.cpp
@@ -0,0 +1,82 @@
+//
+// sonogram.cpp
+//
+// use with fs.sonogram
+//
+// see example-sonogram.pd
+//
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <iostream.h>
+#include <fstream.h>
+#include <string.h>
+#include "plugin.h"
+#include "pixels.h"
+
+#define SONOSIZE 128
+#define SONOMAXVAL 500
+#define sonotype float
+
+int callcount=-1;
+
+void perform_effect(_frame f, _args a)
+{
+	if(!a.s) return;
+
+	if(++callcount>=f.width) callcount=0;
+
+	FILE *inf;
+	if((inf = fopen(a.s, "rb"))==NULL)
+	{
+		printf("sonogram: error opening %s\n", a.s);
+		return;
+	}
+
+	char buf[80];
+	sonotype sono[SONOSIZE];
+	int i=0;
+
+	while(!feof(inf))
+	{
+		if(!fgets(buf, 80, inf))
+		{
+			printf("sonogram: read error.\n");
+			return;
+		}
+		sono[i] = atof(buf);
+		if(++i>=SONOSIZE) break;
+	}
+	fclose(inf);
+
+	int y;
+
+	for(i=0; i<SONOSIZE; i++)
+	{
+		// scale values 0-500 to 0-255
+		if(sono[i]>SONOMAXVAL) sono[i]=SONOMAXVAL;
+		sono[i] = (sonotype)((sono[i] / (float)SONOMAXVAL)*255);
+		// white = no sound
+		sono[i] = abs(sono[i]-255);
+
+		y = (int)((i / (float)SONOSIZE) * (float)f.height);
+		// bottom = bass
+		y = abs((f.height-1) - y);
+
+		switch(f.pixelformat)
+		{
+			case 16:
+				scanline16(f, y)[callcount] =
+				 rgbtocolor16(sono[i], sono[i], sono[i]);
+				break;
+			case 24:
+				scanline24(f, y)[callcount] =
+				 rgbtocolor24(sono[i], sono[i], sono[i]);
+				break;
+			case 32:
+				scanline32(f, y)[callcount] =
+				 rgbtocolor32(sono[i], sono[i], sono[i]);
+				break;
+		}
+	}
+}