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|
<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<!-- template designed by Marco Von Ballmoos -->
<title>Docs For Class ID3_ExtendedHeader</title>
<link rel="stylesheet" href="../../media/stylesheet.css" />
<meta http-equiv='Content-Type' content='text/html; charset=iso-8859-1'/>
</head>
<body>
<div class="page-body">
<h2 class="class-name">Class ID3_ExtendedHeader</h2>
<a name="sec-description"></a>
<div class="info-box">
<div class="info-box-title">Description</div>
<div class="nav-bar">
<span class="disabled">Description</span> |
<a href="#sec-vars">Vars</a>
| <a href="#sec-method-summary">Methods</a> (<a href="#sec-methods">details</a>)
<a href="#sec-const-summary">Constants</a> (<a href="#sec-consts">details</a>)
</div>
<div class="info-box-body">
<!-- ========== Info from phpDoc block ========= -->
<p class="short-description">The extended header contains information that can provide further insight in the structure of the tag, but is not vital to the correct parsing of the tag information; hence the extended header is optional.</p>
<ul class="tags">
<li><span class="field">author:</span> Ryan Butterfield <<a href="mailto:buttza@gmail.com">buttza@gmail.com</a>></li>
<li><span class="field">author:</span> Sven Vollbehr <<a href="mailto:svollbehr@gmail.com">svollbehr@gmail.com</a>></li>
<li><span class="field">version:</span> $Rev: 105 $</li>
<li><span class="field">copyright:</span> Copyright (c) 2008 The PHP Reader Project Workgroup</li>
<li><span class="field">license:</span> <a href="http://code.google.com/p/php-reader/wiki/License">New BSD License</a></li>
</ul>
<p class="notes">
Located in <a class="field" href="_ID3---ExtendedHeader.php.html">/ID3/ExtendedHeader.php</a> (line <span class="field">55</span>)
</p>
<pre><a href="../../php-reader/ID3/ID3_Object.html">ID3_Object</a>
|
--ID3_ExtendedHeader</pre>
</div>
</div>
<a name="sec-const-summary"></a>
<div class="info-box">
<div class="info-box-title">Class Constant Summary</span></div>
<div class="nav-bar">
<a href="#sec-description">Description</a> |
<span class="disabled">Constants</span> (<a href="#sec-consts">details</a>)
<a href="#sec-vars">Vars</a>
|
|
<a href="#sec-method-summary">Methods</a> (<a href="#sec-methods">details</a>)
</div>
<div class="info-box-body">
<div class="const-summary">
<div class="const-title">
<img src="../../media/images/Constant.png" alt=" " />
<a href="#CRC32" title="details" class="const-name">CRC32</a> = <span class="var-type"> 32</span>
</div>
<div class="const-title">
<img src="../../media/images/Constant.png" alt=" " />
<a href="#RESTRICTED" title="details" class="const-name">RESTRICTED</a> = <span class="var-type"> 16</span>
</div>
<div class="const-title">
<img src="../../media/images/Constant.png" alt=" " />
<a href="#UPDATE" title="details" class="const-name">UPDATE</a> = <span class="var-type"> 64</span>
</div>
</div>
</div>
</div>
<a name="sec-method-summary"></a>
<div class="info-box">
<div class="info-box-title">Method Summary</span></div>
<div class="nav-bar">
<a href="#sec-description">Description</a> |
<a href="#sec-const-summary">Constants</a> (<a href="#sec-consts">details</a>)
<a href="#sec-vars">Vars</a>
|
<span class="disabled">Methods</span> (<a href="#sec-methods">details</a>)
</div>
<div class="info-box-body">
<div class="method-summary">
<div class="method-definition">
<span class="method-result">ID3_ExtendedHeader</span>
<a href="#__construct" title="details" class="method-name">__construct</a>
([<span class="var-type"><a href="../../php-reader/Reader.html">Reader</a></span> <span class="var-name">$reader</span> = <span class="var-default">null</span>], [<span class="var-type"></span> <span class="var-name">&$options</span> = <span class="var-default">array()</span>], <span class="var-type">Array</span> <span class="var-name">$options</span>)
</div>
<div class="method-definition">
<span class="method-result">integer</span>
<a href="#getCrc" title="details" class="method-name">getCrc</a>
()
</div>
<div class="method-definition">
<span class="method-result">integer</span>
<a href="#getFlags" title="details" class="method-name">getFlags</a>
(<span class="var-type"></span> <span class="var-name">$flags</span>)
</div>
<div class="method-definition">
<span class="method-result">integer</span>
<a href="#getPadding" title="details" class="method-name">getPadding</a>
()
</div>
<div class="method-definition">
<span class="method-result">integer</span>
<a href="#getRestrictions" title="details" class="method-name">getRestrictions</a>
()
</div>
<div class="method-definition">
<span class="method-result">integer</span>
<a href="#getSize" title="details" class="method-name">getSize</a>
()
</div>
<div class="method-definition">
<span class="method-result">boolean</span>
<a href="#hasFlag" title="details" class="method-name">hasFlag</a>
(<span class="var-type">integer</span> <span class="var-name">$flag</span>)
</div>
<div class="method-definition">
<span class="method-result">void</span>
<a href="#setCrc" title="details" class="method-name">setCrc</a>
(<span class="var-type">integer</span> <span class="var-name">$crc</span>)
</div>
<div class="method-definition">
<span class="method-result">void</span>
<a href="#setFlags" title="details" class="method-name">setFlags</a>
(<span class="var-type">integer</span> <span class="var-name">$flags</span>)
</div>
<div class="method-definition">
<span class="method-result">void</span>
<a href="#setPadding" title="details" class="method-name">setPadding</a>
(<span class="var-type">integer</span> <span class="var-name">$padding</span>)
</div>
<div class="method-definition">
<span class="method-result">void</span>
<a href="#setRestrictions" title="details" class="method-name">setRestrictions</a>
(<span class="var-type">integer</span> <span class="var-name">$restrictions</span>)
</div>
<div class="method-definition">
<span class="method-result">void</span>
<a href="#useCrc" title="details" class="method-name">useCrc</a>
(<span class="var-type">boolean</span> <span class="var-name">$useCrc</span>)
</div>
<div class="method-definition">
<span class="method-result">string</span>
<a href="#__toString" title="details" class="method-name">__toString</a>
()
</div>
</div>
</div>
</div>
<a name="sec-vars"></a>
<div class="info-box">
<div class="info-box-title">Variables</div>
<div class="nav-bar">
<a href="#sec-description">Description</a> |
<a href="#sec-var-summary">Vars</a> (<span class="disabled">details</span>)
<a href="#sec-const-summary">Constants</a> (<a href="#sec-consts">details</a>)
|
<a href="#sec-method-summary">Methods</a> (<a href="#sec-methods">details</a>)
</div>
<div class="info-box-body">
<h4>Inherited Variables</h4>
<A NAME='inherited_vars'><!-- --></A>
<p>Inherited from <span class="classname"><a href="../../php-reader/ID3/ID3_Object.html">ID3_Object</a></span></p>
<blockquote>
<span class="var-title">
<span class="var-name"><a href="../../php-reader/ID3/ID3_Object.html#var$_reader">ID3_Object::$_reader</a></span><br>
</span>
</blockquote>
</div>
</div>
<a name="sec-methods"></a>
<div class="info-box">
<div class="info-box-title">Methods</div>
<div class="nav-bar">
<a href="#sec-description">Description</a> |
<a href="#sec-vars">Vars</a>
<a href="#sec-const-summary">Constants</a> (<a href="#sec-consts">details</a>)
<a href="#sec-method-summary">Methods</a> (<span class="disabled">details</span>)
</div>
<div class="info-box-body">
<A NAME='method_detail'></A>
<a name="method__construct" id="__construct"><!-- --></a>
<div class="evenrow">
<div class="method-header">
<span class="method-title">Constructor __construct</span> (line <span class="line-number">110</span>)
</div>
<!-- ========== Info from phpDoc block ========= -->
<p class="short-description">Constructs the class with given parameters and reads object related data from the ID3v2 tag.</p>
<ul class="tags">
<li><span class="field">access:</span> public</li>
</ul>
<div class="method-signature">
<span class="method-result">ID3_ExtendedHeader</span>
<span class="method-name">
__construct
</span>
([<span class="var-type"><a href="../../php-reader/Reader.html">Reader</a></span> <span class="var-name">$reader</span> = <span class="var-default">null</span>], [<span class="var-type"></span> <span class="var-name">&$options</span> = <span class="var-default">array()</span>], <span class="var-type">Array</span> <span class="var-name">$options</span>)
</div>
<ul class="parameters">
<li>
<span class="var-type"><a href="../../php-reader/Reader.html">Reader</a></span>
<span class="var-name">$reader</span><span class="var-description">: The reader object.</span> </li>
<li>
<span class="var-type">Array</span>
<span class="var-name">$options</span><span class="var-description">: The options array.</span> </li>
<li>
<span class="var-type"></span>
<span class="var-name">&$options</span> </li>
</ul>
<hr class="separator" />
<div class="notes">Redefinition of:</div>
<dl>
<dt><a href="../../php-reader/ID3/ID3_Object.html#method__construct">ID3_Object::__construct()</a></dt>
<dd>Constructs the class with given parameters and reads object related data from the ID3v2 tag.</dd>
</dl>
</div>
<a name="methodgetCrc" id="getCrc"><!-- --></a>
<div class="oddrow">
<div class="method-header">
<span class="method-title">getCrc</span> (line <span class="line-number">184</span>)
</div>
<!-- ========== Info from phpDoc block ========= -->
<p class="short-description">Returns the CRC-32 data.</p>
<ul class="tags">
<li><span class="field">access:</span> public</li>
</ul>
<div class="method-signature">
<span class="method-result">integer</span>
<span class="method-name">
getCrc
</span>
()
</div>
</div>
<a name="methodgetFlags" id="getFlags"><!-- --></a>
<div class="evenrow">
<div class="method-header">
<span class="method-title">getFlags</span> (line <span class="line-number">170</span>)
</div>
<!-- ========== Info from phpDoc block ========= -->
<p class="short-description">Returns the flags byte.</p>
<ul class="tags">
<li><span class="field">access:</span> public</li>
</ul>
<div class="method-signature">
<span class="method-result">integer</span>
<span class="method-name">
getFlags
</span>
(<span class="var-type"></span> <span class="var-name">$flags</span>)
</div>
<ul class="parameters">
<li>
<span class="var-type"></span>
<span class="var-name">$flags</span> </li>
</ul>
</div>
<a name="methodgetPadding" id="getPadding"><!-- --></a>
<div class="oddrow">
<div class="method-header">
<span class="method-title">getPadding</span> (line <span class="line-number">285</span>)
</div>
<!-- ========== Info from phpDoc block ========= -->
<p class="short-description">Returns the total padding size, or simply the total tag size excluding the frames and the headers.</p>
<ul class="tags">
<li><span class="field">deprecated:</span> ID3v2.3.0</li>
<li><span class="field">access:</span> public</li>
</ul>
<div class="method-signature">
<span class="method-result">integer</span>
<span class="method-name">
getPadding
</span>
()
</div>
</div>
<a name="methodgetRestrictions" id="getRestrictions"><!-- --></a>
<div class="evenrow">
<div class="method-header">
<span class="method-title">getRestrictions</span> (line <span class="line-number">266</span>)
</div>
<!-- ========== Info from phpDoc block ========= -->
<p class="short-description">Returns the restrictions. For some applications it might be desired to</p>
<p class="description"><p>restrict a tag in more ways than imposed by the ID3v2 specification. Note that the presence of these restrictions does not affect how the tag is decoded, merely how it was restricted before encoding. If this flag is set the tag is restricted as follows:</p><p><pre> Restrictions %ppqrrstt
p - Tag size restrictions
00 No more than 128 frames and 1 MB total tag size.
01 No more than 64 frames and 128 KB total tag size.
10 No more than 32 frames and 40 KB total tag size.
11 No more than 32 frames and 4 KB total tag size.
q - Text encoding restrictions
0 No restrictions
1 Strings are only encoded with ISO-8859-1 or UTF-8.
r - Text fields size restrictions
00 No restrictions
01 No string is longer than 1024 characters.
10 No string is longer than 128 characters.
11 No string is longer than 30 characters.
Note that nothing is said about how many bytes is used to represent those
characters, since it is encoding dependent. If a text frame consists of
more than one string, the sum of the strungs is restricted as stated.
s - Image encoding restrictions
0 No restrictions
1 Images are encoded only with PNG [PNG] or JPEG [JFIF].
t - Image size restrictions
00 No restrictions
01 All images are 256x256 pixels or smaller.
10 All images are 64x64 pixels or smaller.
11 All images are exactly 64x64 pixels, unless required otherwise.</pre></p></p>
<ul class="tags">
<li><span class="field">access:</span> public</li>
</ul>
<div class="method-signature">
<span class="method-result">integer</span>
<span class="method-name">
getRestrictions
</span>
()
</div>
</div>
<a name="methodgetSize" id="getSize"><!-- --></a>
<div class="oddrow">
<div class="method-header">
<span class="method-title">getSize</span> (line <span class="line-number">154</span>)
</div>
<!-- ========== Info from phpDoc block ========= -->
<p class="short-description">Returns the extended header size in bytes.</p>
<ul class="tags">
<li><span class="field">access:</span> public</li>
</ul>
<div class="method-signature">
<span class="method-result">integer</span>
<span class="method-name">
getSize
</span>
()
</div>
</div>
<a name="methodhasFlag" id="hasFlag"><!-- --></a>
<div class="evenrow">
<div class="method-header">
<span class="method-title">hasFlag</span> (line <span class="line-number">163</span>)
</div>
<!-- ========== Info from phpDoc block ========= -->
<p class="short-description">Checks whether or not the flag is set. Returns <var>true</var> if the flag is set, <var>false</var> otherwise.</p>
<ul class="tags">
<li><span class="field">access:</span> public</li>
</ul>
<div class="method-signature">
<span class="method-result">boolean</span>
<span class="method-name">
hasFlag
</span>
(<span class="var-type">integer</span> <span class="var-name">$flag</span>)
</div>
<ul class="parameters">
<li>
<span class="var-type">integer</span>
<span class="var-name">$flag</span><span class="var-description">: The flag to query.</span> </li>
</ul>
</div>
<a name="methodsetCrc" id="setCrc"><!-- --></a>
<div class="oddrow">
<div class="method-header">
<span class="method-title">setCrc</span> (line <span class="line-number">210</span>)
</div>
<!-- ========== Info from phpDoc block ========= -->
<p class="short-description">Sets the CRC-32. The CRC-32 value is calculated of all the frames in the tag and includes padding.</p>
<ul class="tags">
<li><span class="field">access:</span> public</li>
</ul>
<div class="method-signature">
<span class="method-result">void</span>
<span class="method-name">
setCrc
</span>
(<span class="var-type">integer</span> <span class="var-name">$crc</span>)
</div>
<ul class="parameters">
<li>
<span class="var-type">integer</span>
<span class="var-name">$crc</span><span class="var-description">: The 32-bit CRC value.</span> </li>
</ul>
</div>
<a name="methodsetFlags" id="setFlags"><!-- --></a>
<div class="evenrow">
<div class="method-header">
<span class="method-title">setFlags</span> (line <span class="line-number">177</span>)
</div>
<!-- ========== Info from phpDoc block ========= -->
<p class="short-description">Sets the flags byte.</p>
<ul class="tags">
<li><span class="field">access:</span> public</li>
</ul>
<div class="method-signature">
<span class="method-result">void</span>
<span class="method-name">
setFlags
</span>
(<span class="var-type">integer</span> <span class="var-name">$flags</span>)
</div>
<ul class="parameters">
<li>
<span class="var-type">integer</span>
<span class="var-name">$flags</span><span class="var-description">: The flags byte.</span> </li>
</ul>
</div>
<a name="methodsetPadding" id="setPadding"><!-- --></a>
<div class="oddrow">
<div class="method-header">
<span class="method-title">setPadding</span> (line <span class="line-number">294</span>)
</div>
<!-- ========== Info from phpDoc block ========= -->
<p class="short-description">Sets the total padding size, or simply the total tag size excluding the frames and the headers.</p>
<ul class="tags">
<li><span class="field">deprecated:</span> ID3v2.3.0</li>
<li><span class="field">access:</span> public</li>
</ul>
<div class="method-signature">
<span class="method-result">void</span>
<span class="method-name">
setPadding
</span>
(<span class="var-type">integer</span> <span class="var-name">$padding</span>)
</div>
<ul class="parameters">
<li>
<span class="var-type">integer</span>
<span class="var-name">$padding</span><span class="var-description">: The padding size.</span> </li>
</ul>
</div>
<a name="methodsetRestrictions" id="setRestrictions"><!-- --></a>
<div class="evenrow">
<div class="method-header">
<span class="method-title">setRestrictions</span> (line <span class="line-number">273</span>)
</div>
<!-- ========== Info from phpDoc block ========= -->
<p class="short-description">Sets the restrictions byte. See #getRestrictions for more.</p>
<ul class="tags">
<li><span class="field">access:</span> public</li>
</ul>
<div class="method-signature">
<span class="method-result">void</span>
<span class="method-name">
setRestrictions
</span>
(<span class="var-type">integer</span> <span class="var-name">$restrictions</span>)
</div>
<ul class="parameters">
<li>
<span class="var-type">integer</span>
<span class="var-name">$restrictions</span><span class="var-description">: The restrictions byte.</span> </li>
</ul>
</div>
<a name="methoduseCrc" id="useCrc"><!-- --></a>
<div class="oddrow">
<div class="method-header">
<span class="method-title">useCrc</span> (line <span class="line-number">196</span>)
</div>
<!-- ========== Info from phpDoc block ========= -->
<p class="short-description">Sets whether the CRC-32 should be generated upon tag write.</p>
<ul class="tags">
<li><span class="field">access:</span> public</li>
</ul>
<div class="method-signature">
<span class="method-result">void</span>
<span class="method-name">
useCrc
</span>
(<span class="var-type">boolean</span> <span class="var-name">$useCrc</span>)
</div>
<ul class="parameters">
<li>
<span class="var-type">boolean</span>
<span class="var-name">$useCrc</span><span class="var-description">: Whether CRC-32 should be generated.</span> </li>
</ul>
</div>
<a name="method__toString" id="__toString"><!-- --></a>
<div class="evenrow">
<div class="method-header">
<span class="method-title">__toString</span> (line <span class="line-number">301</span>)
</div>
<!-- ========== Info from phpDoc block ========= -->
<p class="short-description">Returns the header raw data.</p>
<ul class="tags">
<li><span class="field">access:</span> public</li>
</ul>
<div class="method-signature">
<span class="method-result">string</span>
<span class="method-name">
__toString
</span>
()
</div>
</div>
<h4>Inherited Methods</h4>
<a name='inherited_methods'><!-- --></a>
<!-- =========== Summary =========== -->
<p>Inherited From <span class="classname"><a href="../../php-reader/ID3/ID3_Object.html">ID3_Object</a></span></p>
<blockquote>
<span class="method-name"><a href="../../php-reader/ID3/ID3_Object.html#method__construct">ID3_Object::__construct()</a></span><br>
<span class="method-name"><a href="../../php-reader/ID3/ID3_Object.html#methoddecodeSynchsafe32">ID3_Object::decodeSynchsafe32()</a></span><br>
<span class="method-name"><a href="../../php-reader/ID3/ID3_Object.html#methoddecodeUnsynchronisation">ID3_Object::decodeUnsynchronisation()</a></span><br>
<span class="method-name"><a href="../../php-reader/ID3/ID3_Object.html#methodencodeSynchsafe32">ID3_Object::encodeSynchsafe32()</a></span><br>
<span class="method-name"><a href="../../php-reader/ID3/ID3_Object.html#methodencodeUnsynchronisation">ID3_Object::encodeUnsynchronisation()</a></span><br>
<span class="method-name"><a href="../../php-reader/ID3/ID3_Object.html#methodexplodeString8">ID3_Object::explodeString8()</a></span><br>
<span class="method-name"><a href="../../php-reader/ID3/ID3_Object.html#methodexplodeString16">ID3_Object::explodeString16()</a></span><br>
<span class="method-name"><a href="../../php-reader/ID3/ID3_Object.html#methodgetOption">ID3_Object::getOption()</a></span><br>
<span class="method-name"><a href="../../php-reader/ID3/ID3_Object.html#methodgetOptions">ID3_Object::getOptions()</a></span><br>
<span class="method-name"><a href="../../php-reader/ID3/ID3_Object.html#methodsetOption">ID3_Object::setOption()</a></span><br>
<span class="method-name"><a href="../../php-reader/ID3/ID3_Object.html#methodsetOptions">ID3_Object::setOptions()</a></span><br>
<span class="method-name"><a href="../../php-reader/ID3/ID3_Object.html#method__get">ID3_Object::__get()</a></span><br>
<span class="method-name"><a href="../../php-reader/ID3/ID3_Object.html#method__set">ID3_Object::__set()</a></span><br>
</blockquote>
</div>
</div>
<a name="sec-consts"></a>
<div class="info-box">
<div class="info-box-title">Class Constants</div>
<div class="nav-bar">
<a href="#sec-description">Description</a> |
<a href="#sec-var-summary">Constants</a> (<span class="disabled">details</span>)
<a href="#sec-vars">Vars</a>
|
<a href="#sec-method-summary">Methods</a> (<a href="#sec-methods">details</a>)
</div>
<div class="info-box-body">
<a name="constCRC32" id="CRC32"><!-- --></A>
<div class="oddrow">
<div class="const-header">
<img src="../../media/images/Variable.png" />
<span class="const-title">
<span class="const-name">CRC32</span>
= <span class="const-default"> 32</span>
(line <span class="line-number">79</span>)
</span>
</div>
<!-- ========== Info from phpDoc block ========= -->
<ul class="tags">
<li><span class="field">since:</span> 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.</li>
<li><span class="field">since:</span> 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.</li>
</ul>
</div>
<a name="constRESTRICTED" id="RESTRICTED"><!-- --></A>
<div class="evenrow">
<div class="const-header">
<img src="../../media/images/Variable.png" />
<span class="const-title">
<span class="const-name">RESTRICTED</span>
= <span class="const-default"> 16</span>
(line <span class="line-number">86</span>)
</span>
</div>
<!-- ========== Info from phpDoc block ========= -->
<p class="short-description">A flag to denote whether or not the tag has restrictions applied on it.</p>
<ul class="tags">
<li><span class="field">since:</span> ID3v2.4.0</li>
</ul>
</div>
<a name="constUPDATE" id="UPDATE"><!-- --></A>
<div class="oddrow">
<div class="const-header">
<img src="../../media/images/Variable.png" />
<span class="const-title">
<span class="const-name">UPDATE</span>
= <span class="const-default"> 64</span>
(line <span class="line-number">65</span>)
</span>
</div>
<!-- ========== Info from phpDoc block ========= -->
<p class="short-description">A flag to denote that the present tag is an update of a tag found earlier 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.</p>
<ul class="tags">
<li><span class="field">since:</span> ID3v2.4.0</li>
</ul>
</div>
</div>
</div>
<p class="notes" id="credit">
Documentation generated on Fri, 05 Sep 2008 20:18:38 +0300 by <a href="http://www.phpdoc.org" target="_blank">phpDocumentor 1.4.1</a>
</p>
</div></body>
</html>
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