/**
* Constructs the class with given parameters and reads object related data
* from the Flac bitstream.
*
* @param HausDesign_Io_Reader $reader The reader object.
*/
public function __construct($reader)
{
$this->_reader = $reader;
$this->_last = ($tmp = $this->_reader->readUInt8()) >> 7 & 0x1;
$this->_type = $tmp & 0x7f;
$this->_size = $this->_reader->readUInt24BE();
}
/**
* Constructs the class with given filename.
*
* @param string|resource|HausDesign_Io_Reader $filename The path to the file,
* file descriptor of an opened file, or a {@link HausDesign_Io_Reader} instance.
* @throws HausDesign_Io_Exception if an error occur in stream handling.
* @throws HausDesign_Media_Flac_Exception if an error occurs in vorbis bitstream reading.
*/
public function __construct($filename)
{
if ($filename instanceof HausDesign_Io_Reader) {
$this->_reader =& $filename;
} else {
$this->_filename = $filename;
require_once 'HausDesign/Io/FileReader.php';
try {
$this->_reader = new HausDesign_Io_FileReader($filename);
} catch (HausDesign_Io_Exception $e) {
$this->_reader = null;
require_once 'HausDesign/Media/Flac/Exception.php';
throw new HausDesign_Media_Flac_Exception($e->getMessage());
}
}
$capturePattern = $this->_reader->read(4);
if ($capturePattern != 'fLaC') {
require_once 'HausDesign/Media/Flac/Exception.php';
throw new HausDesign_Media_Flac_Exception('Not a valid FLAC bitstream');
}
while (true) {
$offset = $this->_reader->getOffset();
$last = ($tmp = $this->_reader->readUInt8()) >> 7 & 0x1;
$type = $tmp & 0x7f;
$size = $this->_reader->readUInt24BE();
$this->_reader->setOffset($offset);
switch ($type) {
case self::STREAMINFO:
// 0
require_once 'HausDesign/Media/Flac/MetadataBlock/Streaminfo.php';
$this->_metadataBlocks[] = new HausDesign_Media_Flac_MetadataBlock_Streaminfo($this->_reader);
break;
case self::PADDING:
// 1
require_once 'HausDesign/Media/Flac/MetadataBlock/Padding.php';
$this->_metadataBlocks[] = new HausDesign_Media_Flac_MetadataBlock_Padding($this->_reader);
break;
case self::APPLICATION:
// 2
require_once 'HausDesign/Media/Flac/MetadataBlock/Application.php';
$this->_metadataBlocks[] = new HausDesign_Media_Flac_MetadataBlock_Application($this->_reader);
break;
case self::SEEKTABLE:
// 3
require_once 'HausDesign/Media/Flac/MetadataBlock/Seektable.php';
$this->_metadataBlocks[] = new HausDesign_Media_Flac_MetadataBlock_Seektable($this->_reader);
break;
case self::VORBIS_COMMENT:
// 4
require_once 'HausDesign/Media/Flac/MetadataBlock/VorbisComment.php';
$this->_metadataBlocks[] = new HausDesign_Media_Flac_MetadataBlock_VorbisComment($this->_reader);
break;
case self::CUESHEET:
// 5
require_once 'HausDesign/Media/Flac/MetadataBlock/Cuesheet.php';
$this->_metadataBlocks[] = new HausDesign_Media_Flac_MetadataBlock_Cuesheet($this->_reader);
break;
case self::PICTURE:
// 6
require_once 'HausDesign/Media/Flac/MetadataBlock/Picture.php';
$this->_metadataBlocks[] = new HausDesign_Media_Flac_MetadataBlock_Picture($this->_reader);
break;
default:
// break intentionally omitted
}
$this->_reader->setOffset($offset + 4 + $size);
// Jump off the loop if we reached the end of metadata blocks
if ($last === 1) {
break;
}
}
}