/**
* Constructs the class with given parameters and reads object related data
* from the ID3v2 tag.
*
* @param Zend_Io_Reader $reader The reader object.
* @param Array $options The options array.
*/
public function __construct($reader = null, &$options = array())
{
parent::__construct($reader, $options);
if ($reader === null) {
return;
}
$this->_version = $options['version'] = $this->_reader->readInt8() + $this->_reader->readInt8() / 10;
$this->_flags = $this->_reader->readInt8();
$this->_size = $this->_decodeSynchsafe32($this->_reader->readUInt32BE());
}
/**
* Constructs the class with given parameters and reads object related data
* from the ID3v2 tag.
*
* @param Zend_Io_Reader $reader The reader object.
* @param Array $options The options array.
*/
public function __construct($reader = null, &$options = array())
{
parent::__construct($reader, $options);
if ($reader === null) {
return;
}
$offset = $this->_reader->getOffset();
$this->_size = $this->_reader->readUInt32BE();
/* ID3v2.3.0 ExtendedHeader */
if ($this->getOption('version', 4) < 4) {
if ($this->_reader->readUInt16BE() == 0x8000) {
$this->_flags = self::CRC32;
}
$this->_padding = $this->_reader->readUInt32BE();
if ($this->hasFlag(self::CRC32)) {
$this->_crc = $this->_reader->readUInt32BE();
}
} else {
$this->_size = $this->_decodeSynchsafe32($this->_size);
$this->_reader->skip(1);
$this->_flags = $this->_reader->readInt8();
if ($this->hasFlag(self::UPDATE)) {
$this->_reader->skip(1);
}
if ($this->hasFlag(self::CRC32)) {
$this->_reader->skip(1);
$this->_crc = $this->_reader->readInt8() * (0xfffffff + 1) + _decodeSynchsafe32($this->_reader->readUInt32BE());
}
if ($this->hasFlag(self::RESTRICTED)) {
$this->_reader->skip(1);
$this->_restrictions = $this->_reader->readInt8();
}
}
}
/**
* Constructs the Zend_Media_Id3v2 class with given file and options. The
* options array may also be given as the only parameter.
*
* The following options are currently recognized:
* o encoding -- Indicates the encoding that all the texts are presented
* with. See the documentation of iconv for supported values. Please
* note that write operations do not convert string and thus encodings
* are limited to those supported by the {@link Zend_Media_Id3_Encoding}
* interface.
* o version -- The ID3v2 tag version to use in write operation. This
* option is automatically set when a tag is read from a file and
* defaults to version 4.0 for tag write.
* o compat -- Normally unsynchronization is handled automatically behind
* the scenes. However, current versions of Windows operating system and
* Windows Media Player, just to name a few, do not support ID3v2.4 tags
* nor ID3v2.3 tags with unsynchronization. Hence, for compatibility
* reasons, this option is made available to disable automatic tag level
* unsynchronization scheme that version 3.0 supports.
* o readonly -- Indicates that the tag is read from a temporary file or
* another source it cannot be written back to. The tag can, however,
* still be written to another file.
*
* @todo Only limited subset of flags are processed.
* @todo Utilize the SEEK frame and search for a footer to find the tag
* @todo Utilize the LINK frame to fetch frames from other sources
* @param string|resource|Zend_Io_Reader $filename The path to the file,
* file descriptor of an opened file, or a {@link Zend_Io_Reader} instance.
* @param Array $options The options array.
* @throws Zend_Media_Id3_Exception if given file descriptor is not valid
*/
public function __construct($filename = null, $options = array())
{
parent::__construct(null, $options);
if (is_array($filename)) {
$options = $filename;
$filename = null;
}
if ($filename === null) {
$this->_header = new Zend_Media_Id3_Header(null, $options);
return;
}
if ($filename instanceof Zend_Io_Reader) {
$this->_reader =& $filename;
} else {
try {
$this->_reader = new Zend_Io_FileReader($filename);
} catch (Zend_Io_Exception $e) {
$this->_reader = null;
throw new Zend_Media_Id3_Exception($e->getMessage());
}
if (is_string($filename) && !isset($options['readonly'])) {
$this->_filename = $filename;
}
}
$startOffset = $this->_reader->getOffset();
if ($this->_reader->read(3) != 'ID3') {
throw new Zend_Media_Id3_Exception('File does not contain ID3v2 tag');
}
$this->_header = new Zend_Media_Id3_Header($this->_reader, $options);
$tagSize = $this->_header->getSize();
if ($this->_header->getVersion() < 3 || $this->_header->getVersion() > 4) {
throw new Zend_Media_Id3_Exception('File does not contain ID3v2 tag of supported version: v2.' . $this->_header->getVersion());
}
if ($this->_header->getVersion() < 4 && $this->_header->hasFlag(Zend_Media_Id3_Header::UNSYNCHRONISATION)) {
$data = $this->_reader->read($this->_header->getSize());
$this->_reader = new Zend_Io_StringReader($this->_decodeUnsynchronisation($data));
$tagSize = $this->_reader->getSize();
}
$this->clearOption('unsynchronisation');
if ($this->_header->hasFlag(Zend_Media_Id3_Header::UNSYNCHRONISATION)) {
$this->setOption('unsynchronisation', true);
}
if ($this->_header->hasFlag(Zend_Media_Id3_Header::EXTENDED_HEADER)) {
$this->_extendedHeader = new Zend_Media_Id3_ExtendedHeader($this->_reader, $options);
}
if ($this->_header->hasFlag(Zend_Media_Id3_Header::FOOTER)) {
// skip footer, and rather copy header
$this->_footer =& $this->_header;
}
while (true) {
$offset = $this->_reader->getOffset();
// Jump off the loop if we reached the end of the tag
if ($offset - $startOffset - 10 >= $tagSize - ($this->hasFooter() ? 10 : 0) - 10) {
break;
}
// Jump off the loop if we reached padding
if (ord($identifier = $this->_reader->read(1)) === 0) {
break;
}
$identifier .= $this->_reader->read(3);
// Jump off the loop if we reached invalid entities. This fix is
// just to make things work. Utility called MP3ext does not seem
// to know what it is doing as it uses padding to write its
// version information there.
if ($identifier == 'MP3e') {
break;
}
$this->_reader->setOffset($offset);
if (@fopen($file = 'Zend/Media/Id3/Frame/' . ucfirst(strtolower($identifier)) . '.php', 'r', true) !== false) {
}
if (class_exists($classname = 'Zend_Media_Id3_Frame_' . ucfirst(strtolower($identifier)))) {
$frame = new $classname($this->_reader, $options);
} else {
$frame = new Zend_Media_Id3_Frame_Unknown($this->_reader, $options);
}
if (!isset($this->_frames[$frame->getIdentifier()])) {
$this->_frames[$frame->getIdentifier()] = array();
}
$this->_frames[$frame->getIdentifier()][] = $frame;
}
}
/**
* Constructs the class with given parameters and reads object related data
* from the ID3v2 tag.
*
* Replaces the reader instance with a string reader object instance that
* can be used to further process the data in the frame sub class.
*
* @todo Only limited subset of flags are processed.
* @param Zend_Io_Reader $reader The reader object.
* @param Array $options The options array.
*/
public function __construct($reader = null, &$options = array())
{
parent::__construct($reader, $options);
if ($reader === null) {
$this->_identifier = strtoupper(substr(get_class($this), -4));
} else {
$this->_identifier = strtoupper($this->_reader->readString8(4, " "));
/* ID3v2.3.0 size and flags; convert flags to 2.4.0 format */
if ($this->getOption('version', 4) < 4) {
$this->_size = $this->_reader->readUInt32BE();
$flags = $this->_reader->readUInt16BE();
if (($flags & 0x8000) == 0x8000) {
$this->_flags |= self::DISCARD_ON_TAGCHANGE;
}
if (($flags & 0x4000) == 0x4000) {
$this->_flags |= self::DISCARD_ON_FILECHANGE;
}
if (($flags & 0x2000) == 0x2000) {
$this->_flags |= self::READ_ONLY;
}
if (($flags & 0x80) == 0x80) {
$this->_flags |= self::COMPRESSION;
}
if (($flags & 0x40) == 0x40) {
$this->_flags |= self::ENCRYPTION;
}
if (($flags & 0x20) == 0x20) {
$this->_flags |= self::GROUPING_IDENTITY;
}
} else {
$this->_size = $this->_decodeSynchsafe32($this->_reader->readUInt32BE());
$this->_flags = $this->_reader->readUInt16BE();
}
$dataLength = $this->_size;
if ($this->hasFlag(self::DATA_LENGTH_INDICATOR)) {
$dataLength = $this->_decodeSynchsafe32($this->_reader->readUInt32BE());
$this->_size -= 4;
}
$data = $this->_reader->read($this->_size);
$this->_size = $dataLength;
if ($this->hasFlag(self::UNSYNCHRONISATION) || $this->getOption('unsynchronisation', false) === true) {
$data = $this->_decodeUnsynchronisation($data);
}
$this->_reader = new Zend_Io_StringReader($data);
}
}