public function joinBeats()
{
$previous = null;
$finish = true;
$measureStart = $this->measure->getStart();
$measureEnd = $measureStart + $this->measure->getLength();
for ($i = 0; $i < $this->measure->countBeats(); $i++) {
$beat = $this->measure->getBeat($i);
$voice = $beat->getVoice(0);
for ($v = 1; $v < $beat->countVoices(); $v++) {
$currentVoice = $beat->getVoice($v);
if (!$currentVoice->isEmpty()) {
for ($n = 0; $n < $currentVoice->countNotes(); $n++) {
$note = $currentVoice->getNote($n);
$voice->addNote($note);
}
}
}
if ($voice->isEmpty()) {
$this->measure->removeBeat($beat);
$finish = false;
break;
}
$beatStart = $beat->getStart();
if ($previous !== null) {
$previousStart = $previous->getStart();
$previousBestDuration = null;
for ($v = 0; $v < $previous->countVoices(); $v++) {
$previousVoice = $previous->getVoice($v);
if (!$previousVoice->isEmpty()) {
$length = $previousVoice->getDuration()->getTime();
if ($previousStart + $length <= $beatStart) {
if ($previousBestDuration === null || $length > $previousBestDuration->getTime()) {
$previousBestDuration = $previousVoice->getDuration();
}
}
}
}
if ($previousBestDuration !== null) {
$previous->getVoice(0)->getDuration()->copyFrom($previousBestDuration);
} else {
if ($voice->isRestVoice()) {
$this->measure->removeBeat($beat);
$finish = false;
break;
}
$duration = Duration::fromTime($beatStart - $previousStart);
$previous->getVoice(0)->getDuration()->copyFrom($duration);
}
}
$beatBestDuration = null;
for ($v = 0; $v < $beat->countVoices(); $v++) {
$currentVoice = $beat->getVoice($v);
if (!$currentVoice->isEmpty()) {
$length = $currentVoice->getDuration()->getTime();
if ($beatStart + $length <= $measureEnd) {
if ($beatBestDuration === null || $length > $beatBestDuration->getTime()) {
$beatBestDuration = $currentVoice->getDuration();
}
}
}
}
if ($beatBestDuration === null) {
if ($voice->isRestVoice()) {
$this->measure->removeBeat($beat);
$finish = false;
break;
}
$duration = Duration::fromTime($measureEnd - $beatStart);
$voice->getDuration()->copyFrom($duration);
}
$previous = $beat;
}
if (!$finish) {
$this->joinBeats();
}
}