/**
* Constructs the class with given parameters and reads object related data from the bitstream.
*
* The following options are currently recognized:
* o vorbisContext -- Indicates whether to expect comments to be in the context of a vorbis bitstream or not. This
* option can be used to parse vorbis comments in another formats, eg FLAC, that do not use for example the
* framing flags. Defaults to true.
*
* @param HausDesign_Io_Reader $reader The reader object.
* @param Array $options Array of options.
*/
public function __construct($reader, $options = array())
{
if (!isset($options['vorbisContext']) || $options['vorbisContext']) {
parent::__construct($reader);
} else {
$this->_reader = $reader;
}
$this->_vendor = $this->_reader->read($this->_reader->readUInt32LE());
$userCommentListLength = $this->_reader->readUInt32LE();
for ($i = 0; $i < $userCommentListLength; $i++) {
list($name, $value) = preg_split('/=/', $this->_reader->read($this->_reader->readUInt32LE()), 2);
if (!isset($this->_comments[strtoupper($name)])) {
$this->_comments[strtoupper($name)] = array();
}
$this->_comments[strtoupper($name)][] = $value;
}
if (!isset($options['vorbisContext']) || $options['vorbisContext']) {
$this->_framingFlag = $this->_reader->readUInt8() & 0x1;
if ($this->_framingFlag == 0) {
require_once 'HausDesign/Media/Vorbis/Exception.php';
throw new HausDesign_Media_Vorbis_Exception('Undecodable Vorbis stream');
}
$this->_reader->skip($this->_packetSize - $this->_reader->getOffset() + 30);
}
}
/**
* Constructs the class with given parameters.
*
* @param HausDesign_Io_Reader $reader The reader object.
*/
public function __construct($reader)
{
parent::__construct($reader);
$this->_vorbisVersion = $this->_reader->readUInt32LE();
$this->_audioChannels = $this->_reader->readUInt8();
$this->_audioSampleRate = $this->_reader->readUInt32LE();
$this->_bitrateMaximum = $this->_reader->readInt32LE();
$this->_bitrateNominal = $this->_reader->readInt32LE();
$this->_bitrateMinimum = $this->_reader->readInt32LE();
$this->_blocksize0 = pow(2, ($tmp = $this->_reader->readUInt8()) & 0xf);
$this->_blocksize1 = pow(2, $tmp >> 4 & 0xf);
$framingFlag = $this->_reader->readUInt8() & 0x1;
if ($this->_blocksize0 > $this->_blocksize1 || $framingFlag == 0) {
require_once 'HausDesign/Media/Vorbis/Exception.php';
throw new HausDesign_Media_Vorbis_Exception('Undecodable Vorbis stream');
}
}
/**
* Constructs the class with given parameters.
*
* @param HausDesign_Io_Reader $reader The reader object.
*/
public function __construct($reader)
{
parent::__construct($reader);
$this->_reader->skip($this->_packetSize - 7);
}
