/**
* Reads a mesure header
*
* @param integer $number
* @param Song $song
* @param TimeSignature $timeSignature
* @param integer $tempoValue
*
* @return MeasureHeader
*/
public function readMeasureHeader($index, TimeSignature $timeSignature, $tempoValue = 120)
{
$flags = $this->reader->readUnsignedByte();
$header = new MeasureHeader();
$header->setNumber($index + 1);
$header->setStart(0);
$header->getTempo()->setValue($tempoValue);
$header->setRepeatOpen(($flags & 0x4) != 0);
if (($flags & 0x1) != 0) {
$timeSignature->setNumerator($this->reader->readByte());
}
if (($flags & 0x2) != 0) {
$timeSignature->getDenominator()->setValue($this->reader->readByte());
}
$header->getTimeSignature()->copyFrom($timeSignature);
if (($flags & 0x8) != 0) {
$header->setRepeatClose(($this->reader->readByte() & 0xff) - 1);
}
if (($flags & 0x20) != 0) {
$header->setMarker($this->reader->factory('GuitarProMarker')->readMarker($header->getNumber()));
}
if (($flags & 0x10) != 0) {
$header->setRepeatAlternative($this->reader->readUnsignedByte());
}
if (($flags & 0x40) != 0) {
$this->reader->setKeySignature($this->reader->factory('GuitarProKeySignature')->readKeySignature());
$this->reader->skip(1);
}
if (($flags & 0x1) != 0 || ($flags & 0x2) != 0) {
$this->reader->skip(4);
}
if (($flags & 0x10) == 0) {
$this->reader->skip(1);
}
$tripletFeel = $this->reader->readByte();
if ($tripletFeel == 1) {
$header->setTripletFeel(MeasureHeader::TRIPLET_FEEL_EIGHTH);
} else {
if ($tripletFeel == 2) {
$header->setTripletFeel(MeasureHeader::TRIPLET_FEEL_SIXTEENTH);
} else {
$header->setTripletFeel(MeasureHeader::TRIPLET_FEEL_NONE);
}
}
return $header;
}
private function writeMeasureHeader(MeasureHeader $measure, TimeSignature $timeSignature)
{
$flags = 0;
if ($measure->getNumber() == 1 || $measure->getTimeSignature()->getNumerator() != $timeSignature->getNumerator()) {
$flags |= 0x1;
}
if ($measure->getNumber() == 1 || $measure->getTimeSignature()->getDenominator()->getValue() != $timeSignature->getDenominator()->getValue()) {
$flags |= 0x2;
}
if ($measure->isRepeatOpen()) {
$flags |= 0x4;
}
if ($measure->getRepeatClose() > 0) {
$flags |= 0x8;
}
if ($measure->hasMarker()) {
$flags |= 0x20;
}
$this->writeUnsignedByte($flags);
if (($flags & 0x1) != 0) {
$this->writeByte($measure->getTimeSignature()->getNumerator());
}
if (($flags & 0x2) != 0) {
$this->writeByte($measure->getTimeSignature()->getDenominator()->getValue());
}
if (($flags & 0x8) != 0) {
$this->writeByte($measure->getRepeatClose());
}
if (($flags & 0x20) != 0) {
$this->writeMarker($measure->getMarker());
}
}
private function writeMeasureHeader(MeasureHeader $measure, TimeSignature $timeSignature)
{
$flags = 0;
if ($measure->getNumber() == 1) {
$flags |= 0x40;
}
if ($measure->getNumber() == 1 || !$measure->getTimeSignature()->isEqual($timeSignature)) {
$flags |= 0x1;
$flags |= 0x2;
}
if ($measure->isRepeatOpen()) {
$flags |= 0x4;
}
if ($measure->getRepeatClose() > 0) {
$flags |= 0x8;
}
if ($measure->getRepeatAlternative() > 0) {
$flags |= 0x10;
}
if ($measure->hasMarker()) {
$flags |= 0x20;
}
$this->writeUnsignedByte($flags);
if (($flags & 0x1) != 0) {
$this->writeByte($measure->getTimeSignature()->getNumerator());
}
if (($flags & 0x2) != 0) {
$this->writeByte($measure->getTimeSignature()->getDenominator()->getValue());
}
if (($flags & 0x8) != 0) {
$this->writeByte($measure->getRepeatClose() + 1);
}
if (($flags & 0x20) != 0) {
$this->writeMarker($measure->getMarker());
}
if (($flags & 0x10) != 0) {
$this->writeByte($measure->getRepeatAlternative());
}
if (($flags & 0x40) != 0) {
$this->skipBytes(2);
}
if (($flags & 0x1) != 0) {
$this->writeBytes($this->makeEighthNoteBytes($measure->getTimeSignature()));
}
if (($flags & 0x10) == 0) {
$this->writeByte(0);
}
if ($measure->getTripletFeel() == MeasureHeader::TRIPLET_FEEL_NONE) {
$this->writeByte(0);
} else {
if ($measure->getTripletFeel() == MeasureHeader::TRIPLET_FEEL_EIGHTH) {
$this->writeByte(1);
} else {
if ($measure->getTripletFeel() == MeasureHeader::TRIPLET_FEEL_SIXTEENTH) {
$this->writeByte(2);
}
}
}
}
