private function getHeader($tick)
{
$realTick = $tick >= Duration::QUARTER_TIME ? $tick : Duration::QUARTER_TIME;
foreach ($this->headers as $header) {
if ($realTick >= $header->getStart() && $realTick < $header->getStart() + $header->getLength()) {
return $header;
}
}
$last = $this->getLastHeader();
$header = new MeasureHeader();
$header->setNumber($last !== null ? $last->getNumber() + 1 : 1);
$header->setStart($last !== null ? $last->getStart() + $last->getLength() : Duration::QUARTER_TIME);
$header->getTempo()->setValue($last !== null ? $last->getTempo()->getValue() : 120);
if ($last !== null) {
$header->getTimeSignature()->copyFrom($last->getTimeSignature());
} else {
$header->getTimeSignature()->setNumerator(4);
$header->getTimeSignature()->getDenominator()->setValue(Duration::QUARTER);
}
$this->headers[] = $header;
if ($realTick >= $header->getStart() && $realTick < $header->getStart() + $header->getLength()) {
return $header;
}
return $this->getHeader($realTick);
}
