diff src/samer/midi/MidiRecorder.java @ 0:bf79fb79ee13

Initial Mercurial check in.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/samer/midi/MidiRecorder.java	Tue Jan 17 17:50:20 2012 +0000
@@ -0,0 +1,82 @@
+/*
+ *	Copyright (c) 2000, Samer Abdallah, King's College London.
+ *	All rights reserved.
+ *
+ *	This software is provided AS iS and WITHOUT ANY WARRANTY;
+ *	without even the implied warranty of MERCHANTABILITY or
+ *	FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+package samer.midi;
+import samer.core.*;
+import samer.core.types.*;
+import samer.tools.*;
+import samer.maths.*;
+import java.util.*;
+import java.io.*;
+import javax.sound.midi.*;
+
+/**
+	Attempts to do some temporal smoothing on the
+	imput vector. Its a bit like a median filter.
+	A note doesn't switch on until the corresponding
+	vector element has been above threshold for
+	<countThresh> consecutive steps, and similarly
+	for switching off.
+  */
+
+public class MidiRecorder extends MidiRecorderBase implements Task
+{
+	Vec in;
+	int n;
+	int [] nnums, chans;
+	double [] x;
+	VInteger	offset;
+	VBoolean pedal;
+	VDouble factor;
+
+	public MidiRecorder(Vec input) throws Exception {
+
+		Shell.push(node);
+		factor = new VDouble("factor",128,0);
+		offset = new VInteger("offset",0,0);
+		pedal  = new VBoolean("pedal",false,0);
+		// setAgent(this);
+		// addAgent(new Saver(this));
+		Shell.pop();
+
+		in = input;
+		n = in.size();
+		x = in.array();
+
+		nnums = new int[n];
+		chans = new int[n];
+		for (int i=0; i<n; i++) { nnums[i]=i; chans[i]=0; }
+	}
+
+	public int mapVelocity(double x) {
+		int vel=(int)(factor.value*x);
+		if (vel>127) vel=127;
+		return vel;
+	}
+
+	public void dispose() {}
+	public void starting() {}
+	public void stopping() {}
+
+	public void run()
+	{
+		for (int i=0; i<n; i++) {
+
+			if (x[i]>0) {
+					int nnum=nnums[i]+offset.value;
+					int vel=mapVelocity(x[i]);
+					noteOn(chans[i],nnum, vel);
+			} else if (x[i]<0 && !pedal.value) {
+					int nnum=nnums[i]+offset.value;
+					noteOff(chans[i],nnum);
+			}
+		}
+		tick();
+	}
+}