public static function endOfTrack()
{
return MidiMessage::metaMessage(47, array());
}
private function readEvent(MidiTrackReaderHelper $helper)
{
$statusByte = $this->readUnsignedByte();
$helper->remainingBytes--;
$savedByte = 0;
$runningStatusApplies = false;
if ($statusByte < 0x80) {
switch ($helper->runningStatusByte) {
case -1:
throw new Exception('Corrupted MIDI file: status byte is missing');
break;
default:
$runningStatusApplies = true;
$savedByte = $statusByte;
$statusByte = $helper->runningStatusByte;
break;
}
}
$type = $this->getType($statusByte);
if ($type == MidiReader::STATUS_ONE_BYTE) {
$data = 0;
if ($runningStatusApplies) {
$data = $savedByte;
} else {
$data = $this->readUnsignedByte();
$helper->remainingBytes--;
$helper->runningStatusByte = $statusByte;
}
return new MidiEvent(MidiMessage::shortMessage($statusByte & 0xf0, $statusByte & 0xf, $data), $helper->ticks);
} else {
if ($type == MidiReader::STATUS_TWO_BYTES) {
$data1 = 0;
if ($runningStatusApplies) {
$data1 = $savedByte;
} else {
$data1 = $this->readUnsignedByte();
$helper->remainingBytes--;
$helper->runningStatusByte = $statusByte;
}
$helper->remainingBytes--;
return new MidiEvent(MidiMessage::shortMessage($statusByte & 0xf0, $statusByte & 0xf, $data1, $this->readUnsignedByte()), $helper->ticks);
} else {
if ($type == MidiReader::STATUS_SYSEX) {
if (MidiReader::CANCEL_RUNNING_STATUS_ON_META_AND_SYSEX) {
$helper->runningStatusByte = -1;
}
$dataLength = $this->readVariableLengthQuantity($helper);
$data = array();
for ($i = 0; $i < $dataLength; $i++) {
$data[$i] = $this->readUnsignedByte();
$helper->remainingBytes--;
}
} else {
if ($type == MidiReader::STATUS_META) {
if (MidiReader::CANCEL_RUNNING_STATUS_ON_META_AND_SYSEX) {
$helper->runningStatusByte = -1;
}
$typeByte = $this->readUnsignedByte();
$helper->remainingBytes--;
$dataLength = $this->readVariableLengthQuantity($helper);
$data = array();
for ($i = 0; $i < $dataLength; $i++) {
$data[$i] = $this->readUnsignedByte();
$helper->remainingBytes--;
}
return new MidiEvent(MidiMessage::metaMessage($typeByte, $data), $helper->ticks);
}
}
}
}
return null;
}
protected function writeMetaMessage(MidiMessage $message)
{
$length = 0;
$data = $message->getData();
$this->writeUnsignedBytes(array(255));
$this->writeUnsignedBytes(array($message->getCommand()));
$length += 2;
if (is_array($data)) {
$length += $this->writeVariableLengthQuantity(count($data));
$this->writeUnsignedBytes($data);
$length += count($data);
} else {
$length += $this->writeVariableLengthQuantity(strlen($data));
$this->writeUnsignedBytes(array($data));
$length += strlen($data);
}
return $length;
}
