/**
* Constructs the class with given parameters and reads object related data
* from the Ogg bitstream.
*
* @param Zend_Io_Reader $reader The reader object.
*/
public function __construct($reader)
{
$this->_reader = $reader;
$this->_capturePattern = $this->_reader->read(4);
if ($this->_capturePattern != 'OggS') {
throw new Zend_Media_Ogg_Exception('Not a valid Ogg bitstream');
}
$this->_streamStructureVersion = $this->_reader->readUInt8();
if ($this->_streamStructureVersion != 0) {
throw new Zend_Media_Ogg_Exception('Unsupported Ogg stream structure version');
}
$this->_headerTypeFlag = $this->_reader->readUInt8();
$this->_granulePosition = $this->_reader->readInt64LE();
$this->_bitstreamSerialNumber = $this->_reader->readUInt32LE();
$this->_pageSequenceNumber = $this->_reader->readUInt32LE();
$this->_crcChecksum = $this->_reader->readUInt32LE();
$this->_numberPageSegments = $this->_reader->readUInt8();
$this->_segmentTable = array();
for ($i = 0; $i < $this->_numberPageSegments; $i++) {
$this->_segmentTable[] = $this->_reader->readUInt8();
}
$this->_headerSize = $this->_numberPageSegments + 27;
$this->_pageSize = array_sum($this->_segmentTable);
$this->_size = $this->_headerSize + $this->_pageSize;
}
/**
* Constructs the class with given parameters and options.
*
* @param Zend_Io_Reader $reader The reader object.
* @param Array $options The options array.
*/
public function __construct($reader, &$options = array())
{
$this->_reader = $reader;
$this->_options =& $options;
if (($this->_reader = $reader) === null) {
if (defined($constant = 'self::' . strtoupper(preg_replace('/(?<=[a-z])[A-Z]/', '_$0', substr(get_class($this), 22))))) {
$this->_identifier = constant($constant);
} else {
throw new Zend_Media_Asf_Exception('Object identifier could not be determined');
}
} else {
$this->_offset = $this->_reader->getOffset();
$this->_identifier = $this->_reader->readGuid();
$this->_size = $this->_reader->readInt64LE();
}
}