private function writeMeasures(Song $song, Tempo $tempo)
{
for ($i = 0; $i < $song->countMeasureHeaders(); $i++) {
$header = $song->getMeasureHeader($i);
for ($j = 0; $j < $song->countTracks(); $j++) {
$track = $song->getTrack($j);
$measure = $track->getMeasure($i);
$this->writeMeasure($measure, $header->getTempo()->getValue() != $tempo->getValue());
}
$tempo->copyFrom($header->getTempo());
}
}
private function writeMixChange(Tempo $tempo)
{
for ($i = 0; $i < 23; $i++) {
$this->writeByte(0xff);
}
$this->writeStringByteSizeOfInteger('');
$this->writeInt($tempo !== null ? $tempo->getValue() : -1);
if ($tempo !== null) {
$this->skipBytes(1);
}
$this->writeByte(0x1);
$this->writeByte(0xff);
}
private function applyStaticDuration(Tempo $tempo, $duration, $maximum)
{
$value = $tempo->getValue() * $duration / 60;
return $value < $maximum ? $value : $maximum;
}
private function writeMixChange(Tempo $tempo)
{
for ($i = 0; $i < 7; $i++) {
$this->writeByte(-1);
}
$this->writeInt($tempo->getValue());
$this->writeByte(0);
$this->writeUnsignedByte(1);
}
