4135abea31
git-svn-id: http://php-reader.googlecode.com/svn/trunk@256 51a70ab9-7547-0410-9469-37e369ee0574
126 lines
3.6 KiB
PHP
126 lines
3.6 KiB
PHP
<?php
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/**
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* @category Zend
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* @package Zend_Media
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* @subpackage Riff
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* @copyright Copyright (c) 2011 Sven Vollbehr
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id$
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*/
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/**
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* This class represents the basic building block of a RIFF file, called a chunk.
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*
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* @category Zend
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* @package Zend_Media
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* @subpackage Riff
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* @author Sven Vollbehr <sven@vollbehr.eu>
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* @copyright Copyright (c) 2011 Sven Vollbehr
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id: Box.php 177 2010-03-09 13:13:34Z svollbehr $
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*/
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abstract class Zend_Media_Riff_Chunk
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{
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/**
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* The reader object.
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*
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* @var Reader
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*/
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protected $_reader;
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/** @var integer */
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protected $_identifier;
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/** @var integer */
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protected $_size;
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/**
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* Constructs the class with given parameters and options.
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*
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* @param Zend_Io_Reader $reader The reader object.
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*/
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public function __construct($reader)
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{
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$this->_reader = $reader;
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$this->_identifier = $this->_reader->read(4);
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$this->_size = $this->_reader->readUInt32LE();
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}
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/**
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* Returns a four-character code that identifies the representation of the chunk data. A program reading a RIFF file
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* can skip over any chunk whose chunk ID it doesn't recognize; it simply skips the number of bytes specified by
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* size plus the pad byte, if present.
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*
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* @return string
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*/
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public final function getIdentifier()
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{
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return $this->_identifier;
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}
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/**
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* Sets the four-character code that identifies the representation of the chunk data.
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*
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* @param string $identifier The chunk identifier.
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*/
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public final function setIdentifier($identifier)
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{
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$this->_identifier = $identifier;
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}
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/**
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* Returns the size of chunk data. This size value does not include the size of the identifier or size fields or the
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* pad byte at the end of chunk data.
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*
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* @return integer
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*/
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public final function getSize()
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{
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return $this->_size;
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}
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/**
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* Sets the size of chunk data. This size value must not include the size of the identifier or size fields or the
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* pad byte at the end of chunk data.
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*
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* @param integer $size The size of chunk data.
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*/
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public final function setSize($size)
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{
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$this->_size = $size;
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}
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/**
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* Magic function so that $obj->value will work.
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*
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* @param string $name The field name.
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* @return mixed
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*/
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public function __get($name)
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{
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if (method_exists($this, 'get' . ucfirst(strtolower($name)))) {
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return call_user_func(array($this, 'get' . ucfirst(strtolower($name))));
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} else {
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require_once('Zend/Media/Riff/Exception.php');
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throw new Zend_Media_Riff_Exception('Unknown field: ' . $name);
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}
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}
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/**
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* Magic function so that assignments with $obj->value will work.
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*
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* @param string $name The field name.
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* @param string $value The field value.
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* @return mixed
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*/
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public function __set($name, $value)
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{
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if (method_exists($this, 'set' . ucfirst(strtolower($name)))) {
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call_user_func(array($this, 'set' . ucfirst(strtolower($name))), $value);
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} else {
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require_once('Zend/Media/Riff/Exception.php');
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throw new Zend_Media_Riff_Exception('Unknown field: ' . $name);
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}
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}
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}
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