public function testGetTicksFromDeltaByteSequence()
{
$this->assertEquals(0xff, Util::getTicksFromDeltaByteSequence(pack('C2', 0x81, 0x7f)));
$this->assertEquals(0x69, Util::getTicksFromDeltaByteSequence(pack('C', 0x69)));
}
/**
* Reads a delta time from the buffer stream
*
* @since 1.0
* @uses read()
* @uses Util::unpack()
* @uses Util::getTicksFromDeltaByteSequence()
*
* @return int The number of clock ticks in the delta time
*/
protected function getDelta()
{
$byte = $this->read(1, true);
$value = Util::unpack($byte);
$delta = '';
while ($this->file->valid() && $value[0] > 0x7f) {
$delta .= $byte;
$byte = $this->read(1);
$value = Util::unpack($byte);
}
if ($byte !== null) {
$delta .= $byte;
}
return Util::getTicksFromDeltaByteSequence($delta);
}
