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package com.hackingroomba.roombacomm;
import java.util.*;
import java.util.regex.*;
/**
*
*/
public class RTTTLParser {
public static HashMap noteToNum;
static {
noteToNum = new HashMap();
noteToNum.put("c", new Integer(0) );
noteToNum.put("c#", new Integer(1) );
noteToNum.put("d", new Integer(2) );
noteToNum.put("d#", new Integer(3) );
noteToNum.put("e", new Integer(4) );
noteToNum.put("f", new Integer(5) );
noteToNum.put("f#", new Integer(6) );
noteToNum.put("g", new Integer(7) );
noteToNum.put("g#", new Integer(8) );
noteToNum.put("a", new Integer(9) );
noteToNum.put("a#", new Integer(10) );
noteToNum.put("b", new Integer(11) );
noteToNum.put("h", new Integer(7) );
}
public static void main(String[] args) {
if( args.length == 0 ) {
System.out.println( "usage: roombacomm.RTTTLParser <rttlstring>");
System.exit(0);
}
String rtttl = args[0];
ArrayList notelist = parse( rtttl );
for( int i=0; i< notelist.size(); i++ ) {
System.out.println("notelist["+i+"]="+notelist.get(i));
}
}
public static ArrayList parse(String rtttl) {
System.out.println("parsing: "+rtttl);
String rtttl_working = rtttl.toLowerCase();
String parts[] = rtttl_working.split(":");
String name = parts[0];
String defaults[] = parts[1].split("[,=]");
String notes[] = parts[2].split(",");
// global defaults
int bpm = 63;
int octave = 6;
int duration = 4;
ArrayList notelist = new ArrayList();
for( int i=0; i < defaults.length; i++ ) {
//System.out.println("defaults["+i+"]="+defaults[i]);
if( defaults[i].equals("b") )
try { bpm = Integer.parseInt(defaults[i+1]); }
catch(Exception e) {}
else if( defaults[i].equals("o") )
try { octave = Integer.parseInt(defaults[i+1]); }
catch(Exception e) {}
else if( defaults[i].equals("d") )
try { duration = Integer.parseInt(defaults[i+1]); }
catch(Exception e) {}
}
System.out.println("bpm:"+bpm+",octave:"+octave+",duration:"+duration);
for( int i=0; i < notes.length; i++ ) {
Matcher m =Pattern.compile("(\\d+)*(.+?)(\\d)*(\\.)*").matcher(notes[i]);
m.find();
// group(1) == duration (optional)
// group(2) == note (required)
// group(3) == scale (optional)
// group(4) == triplet (optional)
int dur = duration;
int oct = octave;
if( m.group(1) != null )
try { dur = Integer.parseInt( m.group(1) ); }
catch(Exception e) {}
if( m.group(4) != null && m.group(4).equals(".") )
dur += dur/2;
if( m.group(3) != null )
try { oct = Integer.parseInt( m.group(3) ); }
catch(Exception e) {}
if( m.group(2) != null ) {
int notenum;
if( m.group(2).equals("p") ) {
notenum = 0;
}
else {
Integer nn = (Integer) noteToNum.get( m.group(2) );
notenum = nn.intValue();
notenum = notenum + 12*oct;
}
dur = bpmToMillis(bpm) / dur;
notelist.add( new Note( notenum, dur ) );
}
}
return notelist;
}
public static int bpmToMillis( int bpm ) {
return (60 * 1000 ) / bpm;
}
}
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