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Add support for ID3v2.3

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git-svn-id: http://php-reader.googlecode.com/svn/trunk@75 51a70ab9-7547-0410-9469-37e369ee0574
This commit is contained in:
svollbehr
2008-04-14 23:57:21 +00:00
parent 793eb16082
commit 3191721e15
42 changed files with 1338 additions and 243 deletions
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123
src/ID3/ExtendedHeader.php
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@@ -58,21 +58,31 @@ final class ID3_ExtendedHeader extends ID3_Object
* in the present file or stream. If frames defined as unique are found in
* the present tag, they are to override any corresponding ones found in the
* earlier tag. This flag has no corresponding data.
*
* @since ID3v2.4.0
*/
const UPDATE = 128;
const UPDATE = 64;
/**
* A flag to denote that a CRC-32 data is included in the extended header.
* The CRC is calculated on all the data between the header and footer as
* indicated by the header's tag length field, minus the extended header. Note
* that this includes the padding (if there is any), but excludes the footer.
* The CRC-32 is stored as an 35 bit synchsafe integer, leaving the upper four
* bits always zeroed.
* @since ID3v2.4.0 A flag to denote that a CRC-32 data is included in the
* extended header. The CRC is calculated on all the data between the header
* and footer as indicated by the header's tag length field, minus the
* extended header. Note that this includes the padding (if there is any), but
* excludes the footer. The CRC-32 is stored as an 35 bit synchsafe integer,
* leaving the upper four bits always zeroed.
*
* @since ID3v2.3.0 The CRC is calculated before unsynchronisation on the data
* between the extended header and the padding, i.e. the frames and only the
* frames.
*/
const CRC32 = 64;
const CRC32 = 32;
/** A flag to denote whether or not the tag has restrictions applied on it. */
const RESTRICTED = 32;
/**
* A flag to denote whether or not the tag has restrictions applied on it.
*
* @since ID3v2.4.0
*/
const RESTRICTED = 16;
/** @var integer */
private $_size;
@@ -80,6 +90,9 @@ final class ID3_ExtendedHeader extends ID3_Object
/** @var integer */
private $_flags = 0;
/** @var integer */
private $_padding;
/** @var integer */
private $_crc;
@@ -91,33 +104,44 @@ final class ID3_ExtendedHeader extends ID3_Object
* from the ID3v2 tag.
*
* @param Reader $reader The reader object.
* @param Array $options The options array.
*/
public function __construct($reader = null)
public function __construct($reader = null, &$options = array())
{
parent::__construct($reader);
parent::__construct($reader, $options);
if ($reader === null)
return;
$offset = $this->_reader->getOffset();
$this->_size = $this->decodeSynchsafe32($this->_reader->readUInt32BE());
$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);
$this->_crc =
Transform::fromInt8($this->_reader->read(1)) * (0xfffffff + 1) +
decodeSynchsafe32(Transform::fromUInt32BE($this->_reader->read(4)));
}
if ($this->hasFlag(self::RESTRICTED)) {
$this->_reader->skip(1);
$this->_restrictions = $this->_reader->readInt8(1);
/* ID3v2.3.0 ExtendedHeader */
if (isset($this->_options["version"]) && $this->_options["version"] < 4) {
if ($this->_reader->readUInt16BE() == 0x8000)
$this->_flags = self::CRC32;
$this->_padding = $this->_reader->readUInt32BE();
if ($this->hasFlag(self::CRC32))
$this->_crc = Transform::readUInt32BE();
}
$this->_reader->skip($this->_size - $this->_reader->getOffset() - $offset);
/* ID3v2.4.0 ExtendedHeader */
else {
$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);
$this->_crc =
Transform::fromInt8($this->_reader->read(1)) * (0xfffffff + 1) +
decodeSynchsafe32(Transform::fromUInt32BE($this->_reader->read(4)));
}
if ($this->hasFlag(self::RESTRICTED)) {
$this->_reader->skip(1);
$this->_restrictions = $this->_reader->readInt8(1);
}
}
}
/**
@@ -249,20 +273,49 @@ final class ID3_ExtendedHeader extends ID3_Object
$this->_restrictions = $restrictions;
}
/**
* Returns the total padding size, or simply the total tag size excluding the
* frames and the headers.
*
* @return integer
* @deprecated ID3v2.3.0
*/
public function getPadding() { return $this->_padding; }
/**
* Sets the total padding size, or simply the total tag size excluding the
* frames and the headers.
*
* @param integer $padding The padding size.
* @deprecated ID3v2.3.0
*/
public function setPadding($padding) { return $this->_padding = $padding; }
/**
* Returns the header raw data.
*
* @return string
*/
public function toString()
public function __toString()
{
return Transform::toUInt32BE($this->encodeSynchsafe32($this->_size)) .
Transform::toInt8(1) . Transform::toInt8($this->_flags) .
($this->hasFlag(self::UPDATE) ? "\0" : "") .
($this->hasFlag(self::CRC32) ? Transform::toInt8(5) .
Transform::toInt8($this->_crc & 0xf0000000 >> 28 & 0xf /* eq >>> 28 */) .
Transform::toUInt32BE(encodeSynchsafe32($this->_crc)) : "") .
($this->hasFlag(self::RESTRICTED) ?
Transform::toInt8(1) . Transform::toInt8($this->_restrictions) : "");
/* ID3v2.3.0 ExtendedHeader */
if (isset($this->_options["version"]) && $this->_options["version"] < 4) {
return Transform::toUInt32BE($this->_size) .
Transform::toUInt16BE($this->hasFlag(self::CRC32) ? 0x8000 : 0) .
Transform::toUInt32BE($this->_padding) .
($this->hasFlag(self::CRC32) ? Transform::toUInt32BE($this->_crc) : "");
}
/* ID3v2.4.0 ExtendedHeader */
else {
return Transform::toUInt32BE($this->encodeSynchsafe32($this->_size)) .
Transform::toInt8(1) . Transform::toInt8($this->_flags) .
($this->hasFlag(self::UPDATE) ? "\0" : "") .
($this->hasFlag(self::CRC32) ? Transform::toInt8(5) .
Transform::toInt8($this->_crc & 0xf0000000 >> 28 & 0xf /*eq >>> 28*/) .
Transform::toUInt32BE(encodeSynchsafe32($this->_crc)) : "") .
($this->hasFlag(self::RESTRICTED) ?
Transform::toInt8(1) . Transform::toInt8($this->_restrictions) : "");
}
}
}