/*
* Computoser is a music-composition algorithm and a website to present the results
* Copyright (C) 2012-2014 Bozhidar Bozhanov
*
* Computoser is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* Computoser is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Computoser. If not, see <http://www.gnu.org/licenses/>.
*/
package com.music;
import java.util.Random;
import jm.constants.Pitches;
import jm.music.data.Note;
import jm.music.data.Part;
import jm.music.data.Phrase;
import jm.music.data.Rest;
import jm.music.data.Score;
import com.music.model.ExtendedPhrase;
import com.music.model.InstrumentGroups;
import com.music.model.PartType;
import com.music.model.Scale;
import com.music.util.music.Chance;
import com.music.util.music.NoteFactory;
public class PadsGenerator implements ScoreManipulator {
private Random random = new Random();
@Override
public void handleScore(Score score, ScoreContext ctx) {
Part pad1 = ctx.getParts().get(PartType.PAD1);
Part pad2 = ctx.getParts().get(PartType.PAD2);
if (pad1 == null) {
return;
}
Phrase pad1Phrase = new Phrase();
pad1Phrase.setInstrument(pad1.getInstrument());
pad1.add(pad1Phrase);
Phrase pad2Phrase = null;
if (pad2 != null) {
pad2Phrase = new Phrase();
pad2Phrase.setInstrument(pad2.getInstrument());
pad2.add(pad2Phrase);
}
boolean pad1Long = Chance.test(40);
boolean pad2Long = Chance.test(40);
int nextContinuationChangeMeasurePad1 = 0;
int nextContinuationChangeMeasurePad2 = 0;
Part mainPart = ctx.getParts().get(PartType.MAIN);
for (Phrase phrase : mainPart.getPhraseArray()) {
ExtendedPhrase ePhrase = (ExtendedPhrase) phrase;
for (int i = 0; i < ePhrase.getMeasures(); i++) {
nextContinuationChangeMeasurePad1 = handlePads(ctx, ePhrase.getScale(), pad1Phrase, i, nextContinuationChangeMeasurePad1, pad1Long);
if (pad2 != null) {
nextContinuationChangeMeasurePad2 = handlePads(ctx, ePhrase.getScale(), pad2Phrase, i, nextContinuationChangeMeasurePad2, pad2Long);
}
}
}
}
private int handlePads(ScoreContext ctx, Scale scale, Phrase phrase, int measure, int nextContinuationChangeMeasure, boolean longPads) {
if (measure == nextContinuationChangeMeasure) {
if (Chance.test(80)) {
int holdFor = 0;
if ((longPads && Chance.test(80)) || (!longPads && Chance.test(10))) {
holdFor = 2 + random.nextInt(10);
} else {
holdFor = 1;
}
Note note = NoteFactory.createNote(getRandomPitch(ctx, scale), holdFor * ctx.getNormalizedMeasureSize());
note.setDynamic(InstrumentGroups.getInstrumentSpecificDynamics(60, phrase.getInstrument()));
phrase.addNote(note);
return nextContinuationChangeMeasure + holdFor;
} else {
phrase.addRest(new Rest(ctx.getNormalizedMeasureSize()));
return nextContinuationChangeMeasure + 1;
}
} else {
return nextContinuationChangeMeasure;
}
}
private int getRandomPitch(ScoreContext ctx, Scale scale) {
int pitch = Pitches.C4
+ ctx.getKeyNote()
+ scale.getDefinition()[random.nextInt(scale.getDefinition().length)];
return pitch;
}
}