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<?php
/**
* PHP Reader Library
*
* Copyright (c) 2008 The PHP Reader Project Workgroup. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of the project workgroup nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* @package php-reader
* @subpackage ID3
* @copyright Copyright (c) 2008 The PHP Reader Project Workgroup
* @license http://code.google.com/p/php-reader/wiki/License New BSD License
* @version $Id: AENC.php 105 2008-07-30 14:56:47Z svollbehr $
*/
/**#@+ @ignore */
require_once("ID3/Frame.php");
/**#@-*/
/**
* The <i>Audio encryption</i> indicates if the actual audio stream is
* encrypted, and by whom.
*
* The identifier is a URL containing an email address, or a link to a location
* where an email address can be found, that belongs to the organisation
* responsible for this specific encrypted audio file. Questions regarding the
* encrypted audio should be sent to the email address specified. There may be
* more than one AENC frame in a tag, but only one with the same owner
* identifier.
*
* @package php-reader
* @subpackage ID3
* @author Sven Vollbehr <svollbehr@gmail.com>
* @author Ryan Butterfield <buttza@gmail.com>
* @copyright Copyright (c) 2008 The PHP Reader Project Workgroup
* @license http://code.google.com/p/php-reader/wiki/License New BSD License
* @version $Rev: 105 $
*/
final class ID3_Frame_AENC extends ID3_Frame
{
/** @var string */
private $_owner;
/** @var integer */
private $_previewStart;
/** @var integer */
private $_previewLength;
/** @var string */
private $_encryptionInfo;
/**
* Constructs the class with given parameters and parses object related data.
*
* @param 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;
list($this->_owner, $this->_data) = $this->explodeString8($this->_data, 2);
$this->_previewStart = Transform::fromUInt16BE(substr($this->_data, 0, 2));
$this->_previewLength = Transform::fromUInt16BE(substr($this->_data, 2, 2));
$this->_encryptionInfo = substr($this->_data, 4);
}
/**
* Returns the owner identifier string.
*
* @return string
*/
public function getOwner() { return $this->_owner; }
/**
* Sets the owner identifier string.
*
* @param string $owner The owner identifier string.
*/
public function setOwner($owner) { $this->_owner = $owner; }
/**
* Returns the pointer to an unencrypted part of the audio in frames.
*
* @return integer
*/
public function getPreviewStart() { return $this->_previewStart; }
/**
* Sets the pointer to an unencrypted part of the audio in frames.
*
* @param integer $previewStart The pointer to an unencrypted part.
*/
public function setPreviewStart($previewStart)
{
$this->_previewStart = $previewStart;
}
/**
* Returns the length of the preview in frames.
*
* @return integer
*/
public function getPreviewLength() { return $this->_previewLength; }
/**
* Sets the length of the preview in frames.
*
* @param integer $previewLength The length of the preview.
*/
public function setPreviewLength($previewLength)
{
$this->_previewLength = $previewLength;
}
/**
* Returns the encryption info.
*
* @return string
*/
public function getEncryptionInfo() { return $this->_encryptionInfo; }
/**
* Sets the encryption info binary string.
*
* @param string $encryptionInfo The data string.
*/
public function setEncryptionInfo($encryptionInfo)
{
$this->_encryptionInfo = $encryptionInfo;
}
/**
* Returns the frame raw data.
*
* @return string
*/
public function __toString()
{
$this->setData
($this->_owner . "\0" . Transform::toUInt16BE($this->_previewStart) .
Transform::toUInt16BE($this->_previewLength) . $this->_encryptionInfo);
return parent::__toString();
}
}
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