private function parseDuration(Duration $duration)
{
$value = 0;
switch ($duration->getValue()) {
case Duration::WHOLE:
$value = -2;
break;
case Duration::HALF:
$value = -1;
break;
case Duration::QUARTER:
$value = 0;
break;
case Duration::EIGHTH:
$value = 1;
break;
case Duration::SIXTEENTH:
$value = 2;
break;
case Duration::THIRTY_SECOND:
$value = 3;
break;
case Duration::SIXTY_FOURTH:
$value = 4;
break;
}
return $value;
}
