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Add write support for ID3v2 frames

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git-svn-id: http://php-reader.googlecode.com/svn/trunk@65 51a70ab9-7547-0410-9469-37e369ee0574
This commit is contained in:
svollbehr
2008-04-02 15:22:46 +00:00
parent 458335dc9f
commit ad6a722bae
88 changed files with 1857 additions and 337 deletions
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42
src/ID3/ExtendedHeader.php
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@@ -78,13 +78,13 @@ final class ID3_ExtendedHeader extends ID3_Object
private $_size;
/** @var integer */
private $_flags;
private $_flags = 0;
/** @var integer */
private $_crc;
/** @var integer */
private $_restrictions;
private $_restrictions = 0;
/**
* Constructs the class with given parameters and reads object related data
@@ -92,9 +92,12 @@ final class ID3_ExtendedHeader extends ID3_Object
*
* @param Reader $reader The reader object.
*/
public function __construct($reader)
public function __construct($reader = null)
{
parent::__construct($reader);
if ($reader === null)
return;
$offset = $this->_reader->getOffset();
$this->_size = $this->decodeSynchsafe32($this->_reader->readUInt32BE());
@@ -105,9 +108,9 @@ final class ID3_ExtendedHeader extends ID3_Object
$this->_reader->skip(1);
if ($this->hasFlag(self::CRC32)) {
$this->_reader->skip(1);
$this->_crc = Transform::fromInt32BE
(($this->_reader->read(1) << 4) &
$this->decodeSynchsafe32($this->_reader->read(4)));
$this->_crc =
Transform::fromInt8($this->_reader->read(1)) * (0xfffffff + 1) +
decodeSynchsafe32(Transform::fromUInt32BE($this->_reader->read(4)));
}
if ($this->hasFlag(self::RESTRICTED)) {
$this->_reader->skip(1);
@@ -162,14 +165,28 @@ final class ID3_ExtendedHeader extends ID3_Object
/**
* Sets whether the CRC-32 should be generated upon tag write.
*
* @param boolean $useCrc Whether CRC-32 should be generated
* @param boolean $useCrc Whether CRC-32 should be generated.
*/
public function setCrc($useCrc)
public function useCrc($useCrc)
{
if ($useCrc)
$this->setFlags($this->getFlags() | self::CDC32);
$this->setFlags($this->getFlags() | self::CRC32);
else
$this->setFlags($this->getFlags() & ~self::CDC32);
$this->setFlags($this->getFlags() & ~self::CRC32);
}
/**
* Sets the CRC-32. The CRC-32 value is calculated of all the frames in the
* tag and includes padding.
*
* @param integer $crc The 32-bit CRC value.
*/
public function setCrc($crc)
{
if (is_bool($crc))
$this->useCrc($crc);
else
$this->_crc = $crc;
}
/**
@@ -235,7 +252,6 @@ final class ID3_ExtendedHeader extends ID3_Object
/**
* Returns the header raw data.
*
* @todo CRC must use safesynch
* @return string
*/
public function toString()
@@ -243,7 +259,9 @@ final class ID3_ExtendedHeader extends ID3_Object
return Transform::toUInt32BE($this->encodeSynchsafe32($this->_size)) .
Transform::toInt8(1) . Transform::toInt8($this->_flags) .
($this->hasFlag(self::UPDATE) ? "\0" : "") .
($this->hasFlag(self::CRC32) ? Transform::toInt8(5) . $this->_crc : "") .
($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) : "");
}