/**
* Writes the tag data.
*
* @param HausDesign_Io_Writer $writer The writer object.
* @return void
*/
private function _writeData($writer)
{
$this->clearOption('unsynchronisation');
$buffer = new HausDesign_Io_StringWriter();
foreach ($this->_frames as $frames) {
foreach ($frames as $frame) {
$frame->write($buffer);
}
}
$frameData = $buffer->toString();
$frameDataLength = strlen($frameData);
$paddingLength = 0;
// ID3v2.4.0 supports frame level unsynchronisation while
// ID3v2.3.0 supports only tag level unsynchronisation.
if ($this->getOption('version', 4) < 4 && $this->getOption('compat', false) !== true) {
$frameData = $this->_encodeUnsynchronisation($frameData);
if (($len = strlen($frameData)) != $frameDataLength) {
$frameDataLength = $len;
$this->_header->setFlags($this->_header->getFlags() | HausDesign_Media_Id3_Header::UNSYNCHRONISATION);
} else {
$this->_header->setFlags($this->_header->getFlags() & ~HausDesign_Media_Id3_Header::UNSYNCHRONISATION);
}
}
// The tag padding is calculated as follows. If the tag can be written
// in the space of the previous tag, the remaining space is used for
// padding. If there is no previous tag or the new tag is bigger than
// the space taken by the previous tag, the padding is a constant
// 4096 bytes.
if ($this->hasFooter() === false) {
if ($this->_reader !== null && $frameDataLength < $this->_header->getSize()) {
$paddingLength = $this->_header->getSize() - $frameDataLength;
} else {
$paddingLength = 4096;
}
}
/* ID3v2.4.0 CRC calculated w/ padding */
if ($this->getOption('version', 4) >= 4) {
$frameData = str_pad($frameData, $frameDataLength += $paddingLength, "");
}
$extendedHeaderData = '';
$extendedHeaderDataLength = 0;
if ($this->hasExtendedHeader()) {
$this->_extendedHeader->setPadding($paddingLength);
if ($this->_extendedHeader->hasFlag(HausDesign_Media_Id3_ExtendedHeader::CRC32)) {
$crc = crc32($frameData);
if ($crc & 0x80000000) {
$crc = -(($crc ^ 0xffffffff) + 1);
}
$this->_extendedHeader->setCrc($crc);
}
$buffer = new HausDesign_Io_StringWriter();
$this->_extendedHeader->write($buffer);
$extendedHeaderData = $buffer->toString();
$extendedHeaderDataLength = strlen($extendedHeaderData);
}
/* ID3v2.3.0 CRC calculated w/o padding */
if ($this->getOption('version', 4) < 4) {
$frameData = str_pad($frameData, $frameDataLength += $paddingLength, "");
}
$this->_header->setSize($extendedHeaderDataLength + $frameDataLength);
$writer->write('ID3');
$this->_header->write($writer);
$writer->write($extendedHeaderData);
$writer->write($frameData);
if ($this->hasFooter()) {
$writer->write('3DI');
$this->_footer->write($writer);
}
}
/**
* Writes the frame data with the header.
*
* @param HausDesign_Io_Writer $writer The writer object.
* @return void
*/
public function write($writer)
{
/* ID3v2.3.0 Flags; convert from 2.4.0 format */
if ($this->getOption('version', 4) < 4) {
$flags = 0;
if ($this->hasFlag(self::DISCARD_ON_TAGCHANGE)) {
$flags = $flags | 0x8000;
}
if ($this->hasFlag(self::DISCARD_ON_FILECHANGE)) {
$flags = $flags | 0x4000;
}
if ($this->hasFlag(self::READ_ONLY)) {
$flags = $flags | 0x2000;
}
if ($this->hasFlag(self::COMPRESSION)) {
$flags = $flags | 0x80;
}
if ($this->hasFlag(self::ENCRYPTION)) {
$flags = $flags | 0x40;
}
if ($this->hasFlag(self::GROUPING_IDENTITY)) {
$flags = $flags | 0x20;
}
} else {
$flags = $this->_flags;
}
$this->_writeData($buffer = new HausDesign_Io_StringWriter());
$data = $buffer->toString();
$size = $this->_size = strlen($data);
// ID3v2.4.0 supports frame level unsynchronisation. The corresponding
// option is set to true when any of the frames use the
// unsynchronisation scheme. The usage is denoted by
// HausDesign_Media_Id3_Header flag that is set accordingly upon file write.
if ($this->getOption('version', 4) >= 4) {
$data = $this->_encodeUnsynchronisation($data);
if (($dataLength = strlen($data)) != $size) {
$size = 4 + $dataLength;
$flags |= self::DATA_LENGTH_INDICATOR | self::UNSYNCHRONISATION;
$this->setOption('unsynchronisation', true);
} else {
$flags &= ~(self::DATA_LENGTH_INDICATOR | self::UNSYNCHRONISATION);
}
}
$writer->writeString8(substr($this->_identifier, 0, 4), 4, " ")->writeUInt32BE($this->getOption('version', 4) < 4 ? $size : $this->_encodeSynchsafe32($size))->writeUInt16BE($flags);
if (($flags & self::DATA_LENGTH_INDICATOR) == self::DATA_LENGTH_INDICATOR) {
$writer->writeUInt32BE($this->getOption('version', 4) < 4 ? $this->_size : $this->_encodeSynchsafe32($this->_size));
}
$writer->write($data);
}
/**
* Writes the header data.
*
* @param HausDesign_Io_Writer $writer The writer object.
* @return void
*/
public function write($writer)
{
/* ID3v2.3.0 ExtendedHeader */
if ($this->getOption('version', 4) < 4) {
$writer->writeUInt32BE($this->_size)->writeUInt16BE($this->hasFlag(self::CRC32) ? 0x8000 : 0)->writeUInt32BE($this->_padding);
if ($this->hasFlag(self::CRC32)) {
$writer->writeUInt32BE($this->_crc);
}
} else {
$writer->writeUInt32BE($this->_encodeSynchsafe32($this->_size))->writeInt8(1)->writeInt8($this->_flags);
if ($this->hasFlag(self::UPDATE)) {
$writer->write("");
}
if ($this->hasFlag(self::CRC32)) {
$writer->writeInt8(5)->writeInt8($this->_crc & 0xf0000000 >> 28 & 0xf)->writeUInt32BE($this->_encodeSynchsafe32($this->_crc));
}
if ($this->hasFlag(self::RESTRICTED)) {
$writer->writeInt8(1)->writeInt8($this->_restrictions);
}
}
}
/**
* Writes the frame raw data without the header.
*
* @param HausDesign_Io_Writer $writer The writer object.
* @return void
*/
protected function _writeData($writer)
{
$writer->writeUInt8($this->_encoding)->write($this->_language);
switch ($this->_encoding) {
case self::UTF16LE:
$writer->writeString16($this->_text, HausDesign_Io_Writer::LITTLE_ENDIAN_ORDER);
break;
case self::UTF16:
// break intentionally omitted
// break intentionally omitted
case self::UTF16BE:
// break intentionally omitted
// break intentionally omitted
default:
$writer->write($this->_text);
break;
}
}
/**
* Writes the frame raw data without the header.
*
* @param HausDesign_Io_Writer $writer The writer object.
* @return void
*/
protected function _writeData($writer)
{
$writer->write($this->_link);
}
/**
* Writes the frame raw data without the header.
*
* @param HausDesign_Io_Writer $writer The writer object.
* @return void
*/
protected function _writeData($writer)
{
$writer->writeUInt8($this->_encoding);
switch ($this->_encoding) {
case self::UTF16LE:
$writer->writeString16($this->_description, HausDesign_Io_Writer::LITTLE_ENDIAN_ORDER, 1);
break;
case self::UTF16:
// break intentionally omitted
// break intentionally omitted
case self::UTF16BE:
$writer->writeString16($this->_description, null, 1);
break;
default:
$writer->writeString8($this->_description, 1);
break;
}
$writer->write($this->_link);
}
/**
* Writes the frame raw data without the header.
*
* @param HausDesign_Io_Writer $writer The writer object.
* @return void
*/
protected function _writeData($writer)
{
$writer->writeUInt8($this->_encoding);
switch ($this->_encoding) {
case self::UTF16LE:
$count = count($this->_text);
for ($i = 0; $i < $count; $i++) {
$writer->writeString16($text, HausDesign_Io_Writer::LITTLE_ENDIAN_ORDER, $i == $count ? null : 1);
}
break;
case self::UTF16:
// break intentionally omitted
// break intentionally omitted
case self::UTF16BE:
$writer->write(implode("", $this->_text));
break;
default:
$writer->write(implode("", $this->_text));
break;
}
}
/**
* Writes the frame raw data without the header.
*
* @param HausDesign_Io_Writer $writer The writer object.
* @return void
*/
protected function _writeData($writer)
{
$tmp = new HausDesign_Io_StringWriter();
$tmp->writeUInt32BE($this->_bufferSize);
$writer->write(substr($tmp->toString(), 1, 3))->writeInt8($this->_infoFlags)->writeInt32BE($this->_offset);
}