/**
* Look ahead at the next measure, build and determine a suitable SongPhrase to handle it.
*
* @param itM an iterator over the measures collection. It must be pointing so that itM.next()
* returns the current measure, which will be marked as a repeatStart.
* @param itMTP an iterator over the measure-track pairs collection. It must be pointing so that
* itMTP.next() returns the first track of the current measure
* @param tracks The tracks definitions
* @return the next SongPhrase
*/
private static SongPhrase phraseFactory(
Song song,
ListIterator<GPMeasure> itM,
ListIterator<GPMeasureTrackPair> itMTP,
List<GPTrack> tracks)
throws GPFormatException {
SongPhrase sp = null;
GPMeasure measure = itM.next(); // peek inside the measure
// and dispatch to the right
// factory
itM.previous(); // rewind before calling the right factory method
// TODO add getter and setter for GP4Measure.repeatStart
logger.finer("Measure " + measure.getNumber() + " repeat start " + measure.repeatStart);
logger.finer(
"Measure " + measure.getNumber() + " repeat count " + measure.getNumberOfRepetitions());
// if it's the start of a repeat, then make a repeated phrase
if (measure.repeatStart) {
logger.fine("Creating a repeated phrase at " + measure.getNumber());
sp = makeRepeatedSongPhrase(song, itM, itMTP, tracks);
}
// Failing everything else, just return a single measure
if (sp == null) {
logger.fine("Creating a measure phrase at " + measure.getNumber());
sp = makeSongMeasure(song, itM, itMTP, tracks);
}
return sp;
}
/**
* Create and return a regular SongMeasure from the current position of the iterators.
*
* @param itM an iterator over the measures collection. It must be pointing so that itM.next()
* returns the current measure, which will be marked as a repeatStart.
* @param itMTP an iterator over the measure-track pairs collection. It must be pointing so that
* itMTP.next() returns the first track of the current measure
* @param tracks The tracks definitions
* @return a new filled-out SongMeasure
* @throws GP4AdaptorException
*/
private static RepeatedSongPhrase makeRepeatedSongPhrase(
Song song,
ListIterator<GPMeasure> itM,
ListIterator<GPMeasureTrackPair> itMTP,
List<GPTrack> tracks)
throws GPFormatException {
SongPhraseList spl = new SongPhraseListImpl();
// read the first measure without testing for the repeat marker again.
spl.addPhrase(makeSongMeasure(song, itM, itMTP, tracks));
// look back at the last measure processed to see if we've done
GPMeasure measure = itM.previous();
itM.next();
int repeatCount = measure.getNumberOfRepetitions();
// keep calling the phrase factory until you find a measure
// that's marked with a repeat count. If you run out of measures
// (Corneille)
// then assume the last measure has a repeat count of 1.
while (repeatCount == 0) {
if (!itM.hasNext()) {
logger.fine("Got to end of score before finding a closing repeat mark, assuming 1");
repeatCount = 1;
break;
}
SongPhrase phrase = phraseFactory(song, itM, itMTP, tracks);
spl.addPhrase(phrase);
measure = itM.previous();
itM.next();
repeatCount = measure.getNumberOfRepetitions();
logger.fine("Repeat count measure at " + measure.getNumber() + " is " + repeatCount);
}
return new RepeatedSongPhraseImpl(spl, repeatCount);
}
/**
* Create and return a regular SongMeasure from the current position of the iterators.
*
* @param itM an iterator over the measures collection. It must be pointing so that itM.next()
* returns the current measure
* @param itMTP an iterator over the measure-track pairs collection. It must be pointing so that
* itMTP.next() returns the first track of the current measure
* @param tracks The tracks definitions
* @return a new filled-out SongMeasure
* @throws GP4AdaptorException
*/
private static SongMeasure makeSongMeasure(
Song song,
ListIterator<GPMeasure> itM,
ListIterator<GPMeasureTrackPair> itMTP,
List<GPTrack> tracks) {
GPMeasure measure = itM.next();
int ending = measure.getNumberOfAlternateEnding();
if (ending > 0) {
logger.warning("Measure " + measure.getNumber() + " is alternate ending " + ending);
}
// TODO getNumber
// TODO getNumberOfAlternateEnding
// TODO getNumberOfRepetitions
// TODO getTonality
int numerator = measure.getNumerator();
int denominator = measure.getDenominator();
int measureLength = PPQ_HIGH_RESOLUTION * 4 * numerator / denominator;
// OLD MGG logger.finer("Measure "+measure.getNumber()+",
// "+numerator+"/"+denominator+", length " + measureLength);
TimeSignature ts = new TimeSignature(numerator, denominator);
SongMeasure sm = new SongMeasureImpl(measure.getNumber(), measureLength / PPQ_SCALE_FACTOR, ts);
for (int trackIndex = 1; trackIndex <= tracks.size(); trackIndex++) {
GPTrack track = tracks.get(trackIndex - 1);
// TODO is12StringedGuitarTrack
// TODO isBanjoTrack
// TODO getter/setter for isDrumsTrack
// TODO getChannelEffects
// TODO getColor
// TODO getName
// TODO getNumberOfFrets
// TODO getPort
int capo = track.getCapo();
int strings = track.getNumberOfStrings();
int stringTuning[] = new int[strings];
for (int i = 0; i < strings; i++) stringTuning[i] = track.getStringsTuning(i);
// OLD MGG logger.finer("Measure " + measure.getNumber() + " Track "+
// trackIndex);
GPMeasureTrackPair mtp = itMTP.next();
SongMeasureTrack smt = new SongMeasureTrackImpl(song.getTrack(trackIndex));
sm.addTrack(smt);
List<GPBeat> beats = mtp.getBeats();
int beatOffset = 0;
for (Iterator<GPBeat> itBeat = beats.iterator(); itBeat.hasNext(); ) {
GPBeat beat = itBeat.next();
// TODO effects
GPDuration duration = beat.getDuration();
// TODO add getter and setter for GP4Beat.dottedNotes
boolean dotted = beat.dottedNotes;
int ntuplet = beat.getNTuplet();
int beatDuration = calculateDuration(duration, dotted, ntuplet);
if (beat.isNoteBeat()) {
List<GPNote> notes = beat.getNotes();
List<Integer> stringsPlayed = new LinkedList<Integer>();
// TODO suggest an easier way of returning the played
// string list
for (int i = 6; i >= 0; i--) {
if (beat.isStringPlayed(i)) {
stringsPlayed.add(new Integer(i));
}
}
Iterator<GPNote> itNotes = notes.iterator();
Iterator<Integer> itStrings = stringsPlayed.iterator();
while (itNotes.hasNext()) {
// OLD MGG Integer stringObject = (Integer) itStrings.next();
// see TODO.TXT or NEWFEATURES.TXT
// this lines were added to fix the GTP playing error - BEGIN
Integer stringObject;
if (!itStrings.hasNext()) {
// this error appears to happen when its *.GTP file
// TODO show a friendly error
break;
}
/*ELSE*/
// END
stringObject = itStrings.next();
// Note that the tuning array has the highest string
// at index 0
// but the track has the highest string at index 6.
// TODO find out if this is correct. What about a
// 4-string bass?
int stringID = 6 - stringObject.intValue();
GPNote note = itNotes.next();
int noteDuration = beatDuration;
// see if this note has time independent settings on
// it
// TODO getter/setter for GP4Note.duration
GPDuration tiDuration = note.duration;
if (tiDuration != null) {
// TODO getter/setter for GP4Note.isDotted
boolean tiDotted = note.isDotted;
int tiTriplet = note.getNTuplet();
noteDuration = calculateDuration(tiDuration, tiDotted, tiTriplet);
}
// TODO isDeadNote
// TODO isGhostNote
// TODO isTieNote
// TODO effects
// TODO Note effects are a little bit difficult.
// Remember these are guitar effects
// so we effectively need a 'virtual track' for
// every string, so when we playback we
// can assign a unique MIDI channel to that track
// and so we can apply a channel-wide
// controller to that effect (such as pitch bend).
// Even the simple effect (let ring)
// can't be done easily right now because we can't
// tell when to really kill the note.
// Of course if we don't need an effect, we should
// try to use as few MIDI channels as
// we can!
int virtualTrackID = stringID;
SongVirtualTrack svt = smt.getVirtualTrack(virtualTrackID);
int noteStart = beatOffset / PPQ_SCALE_FACTOR;
int noteEnd = (beatOffset + noteDuration) / PPQ_SCALE_FACTOR;
// FIXME cover the tie note case by grabbing the
// last fret
if (note.isTieNote()) {
svt.addEvent(new SongEventImpl(noteStart, new SongTieMessage(noteEnd - noteStart)));
} else {
int baseFret = note.getFretNumber(); // OLD
// .getNumberOfFret();
int fret = baseFret + capo;
GPDynamic dynamic = note.getDynamic();
int velocity = DynamicsMap.velocityOf(dynamic);
int pitch = stringTuning[stringID] + fret;
svt.addEvent(
new SongEventImpl(
noteStart,
new SongNoteOnMessage(pitch, velocity, noteEnd - noteStart, baseFret)));
}
}
}
beatOffset += beatDuration;
}
if (beatOffset != measureLength) {
// an underfull one isn't fatal, but an overfull one is
String reason =
"Measure: "
+ measure.getNumber()
+ " track: "
+ trackIndex
+ " length mismatch, expected "
+ measureLength
+ ", got "
+ beatOffset;
if (beatOffset > measureLength) {
logger.fine(reason);
System.err.println(reason);
} else {
logger.fine(reason);
}
}
}
return sm;
}
