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<h1>src/header_tag.cpp</h1><a href="header__tag_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// $Id: header_tag.cpp,v 1.25 2003/03/02 14:30:46 t1mpy Exp $</span>
<a name="l00002"></a>00002
<a name="l00003"></a>00003 <span class="comment">// id3lib: a C++ library for creating and manipulating id3v1/v2 tags</span>
<a name="l00004"></a>00004 <span class="comment">// Copyright 1999, 2000 Scott Thomas Haug</span>
<a name="l00005"></a>00005 <span class="comment">// Copyright 2002 Thijmen Klok (thijmen@id3lib.org)</span>
<a name="l00006"></a>00006
<a name="l00007"></a>00007 <span class="comment">// This library is free software; you can redistribute it and/or modify it</span>
<a name="l00008"></a>00008 <span class="comment">// under the terms of the GNU Library General Public License as published by</span>
<a name="l00009"></a>00009 <span class="comment">// the Free Software Foundation; either version 2 of the License, or (at your</span>
<a name="l00010"></a>00010 <span class="comment">// option) any later version.</span>
<a name="l00011"></a>00011 <span class="comment">//</span>
<a name="l00012"></a>00012 <span class="comment">// This library is distributed in the hope that it will be useful, but WITHOUT</span>
<a name="l00013"></a>00013 <span class="comment">// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or</span>
<a name="l00014"></a>00014 <span class="comment">// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public</span>
<a name="l00015"></a>00015 <span class="comment">// License for more details.</span>
<a name="l00016"></a>00016 <span class="comment">//</span>
<a name="l00017"></a>00017 <span class="comment">// You should have received a copy of the GNU Library General Public License</span>
<a name="l00018"></a>00018 <span class="comment">// along with this library; if not, write to the Free Software Foundation,</span>
<a name="l00019"></a>00019 <span class="comment">// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.</span>
<a name="l00020"></a>00020
<a name="l00021"></a>00021 <span class="comment">// The id3lib authors encourage improvements and optimisations to be sent to</span>
<a name="l00022"></a>00022 <span class="comment">// the id3lib coordinator. Please see the README file for details on where to</span>
<a name="l00023"></a>00023 <span class="comment">// send such submissions. See the AUTHORS file for a list of people who have</span>
<a name="l00024"></a>00024 <span class="comment">// contributed to id3lib. See the ChangeLog file for a list of changes to</span>
<a name="l00025"></a>00025 <span class="comment">// id3lib. These files are distributed with id3lib at</span>
<a name="l00026"></a>00026 <span class="comment">// http://download.sourceforge.net/id3lib/</span>
<a name="l00027"></a>00027
<a name="l00028"></a>00028
<a name="l00029"></a>00029 <span class="preprocessor">#include "<a class="code" href="header__tag_8h.html">header_tag.h</a>"</span>
<a name="l00030"></a>00030 <span class="preprocessor">#include "id3/utils.h"</span> <span class="comment">// has <config.h> "id3/id3lib_streams.h" "id3/globals.h" "id3/id3lib_strings.h"</span>
<a name="l00031"></a>00031 <span class="preprocessor">#include "<a class="code" href="tag_8h.html">tag.h</a>"</span>
<a name="l00032"></a>00032 <span class="preprocessor">#include "<a class="code" href="io__helpers_8h.html">io_helpers.h</a>"</span>
<a name="l00033"></a>00033 <span class="preprocessor">#include "<a class="code" href="spec_8h.html">spec.h</a>"</span>
<a name="l00034"></a>00034
<a name="l00035"></a>00035 <span class="keyword">using namespace </span>dami;
<a name="l00036"></a>00036
<a name="l00037"></a>00037 <span class="keyword">const</span> <span class="keywordtype">char</span>* <span class="keyword">const</span> <a class="code" href="class_i_d3___tag_header.html#a43bd89984ebf5777677d472a3fccaf3d">ID3_TagHeader::ID</a> = <span class="stringliteral">"ID3"</span>;
<a name="l00038"></a>00038
<a name="l00039"></a><a class="code" href="class_i_d3___tag_header.html#a8c662dcf0cdb4a9ec5c06ee05b5210d4">00039</a> <span class="keywordtype">bool</span> <a class="code" href="class_i_d3___tag_header.html#a8c662dcf0cdb4a9ec5c06ee05b5210d4">ID3_TagHeader::SetSpec</a>(<a class="code" href="globals_8h.html#a48b13eb6cb3c520195901516dee1e612">ID3_V2Spec</a> spec)
<a name="l00040"></a>00040 {
<a name="l00041"></a>00041 <span class="keywordtype">bool</span> changed = this-><a class="code" href="class_i_d3___tag_header.html#a8c662dcf0cdb4a9ec5c06ee05b5210d4">ID3_Header::SetSpec</a>(spec);
<a name="l00042"></a>00042 <span class="keywordflow">if</span> (changed)
<a name="l00043"></a>00043 {
<a name="l00044"></a>00044 <span class="keywordflow">if</span> (<a class="code" href="class_i_d3___header.html#aabd26d3bbd84b38f5b207ab95f68800e">_info</a>)
<a name="l00045"></a>00045 {
<a name="l00046"></a>00046 <a class="code" href="class_i_d3___header.html#af566de5a6ab82c06c60a8a339efd99cb">_flags</a>.<a class="code" href="class_i_d3___flags.html#a6aa5d0be84c92c189c777c6b77fdda06">set</a>(<a class="code" href="class_i_d3___tag_header.html#ad90e54cc492db00bded94b996c6030cca13a2cc9511879d8de620ef0feacd4c8a">HEADER_FLAG_EXPERIMENTAL</a>, <a class="code" href="class_i_d3___header.html#aabd26d3bbd84b38f5b207ab95f68800e">_info</a>-><a class="code" href="struct_i_d3___header_1_1_info.html#a32881e57741d042b7770ade57b572697">is_experimental</a>);
<a name="l00047"></a>00047 <a class="code" href="class_i_d3___header.html#af566de5a6ab82c06c60a8a339efd99cb">_flags</a>.<a class="code" href="class_i_d3___flags.html#a6aa5d0be84c92c189c777c6b77fdda06">set</a>(<a class="code" href="class_i_d3___tag_header.html#ad90e54cc492db00bded94b996c6030ccacd2716bfe516ac15d3e9d2fd45388203">HEADER_FLAG_EXTENDED</a>, <a class="code" href="class_i_d3___header.html#aabd26d3bbd84b38f5b207ab95f68800e">_info</a>-><a class="code" href="struct_i_d3___header_1_1_info.html#a5b05790b9e2ca9c558aa171803d18acf">is_extended</a>);
<a name="l00048"></a>00048 }
<a name="l00049"></a>00049 }
<a name="l00050"></a>00050 <span class="keywordflow">return</span> changed;
<a name="l00051"></a>00051 }
<a name="l00052"></a>00052
<a name="l00053"></a><a class="code" href="class_i_d3___tag_header.html#ac84d93b59696e0a75688486543f71024">00053</a> <span class="keywordtype">size_t</span> <a class="code" href="class_i_d3___tag_header.html#ac84d93b59696e0a75688486543f71024">ID3_TagHeader::Size</a>()<span class="keyword"> const</span>
<a name="l00054"></a>00054 <span class="keyword"></span>{
<a name="l00055"></a>00055 <span class="keywordtype">size_t</span> bytesUsed = <a class="code" href="class_i_d3___tag_header.html#a4182519e23dc329bdf25ab1213bd6096a74cf4937e78303a0b961dfb12c9f2b04">ID3_TagHeader::SIZE</a>;
<a name="l00056"></a>00056
<a name="l00057"></a>00057 <span class="keywordflow">if</span> (<a class="code" href="class_i_d3___header.html#aabd26d3bbd84b38f5b207ab95f68800e">_info</a>-><a class="code" href="struct_i_d3___header_1_1_info.html#a5b05790b9e2ca9c558aa171803d18acf">is_extended</a>)
<a name="l00058"></a>00058 {
<a name="l00059"></a>00059 bytesUsed += <a class="code" href="class_i_d3___header.html#aabd26d3bbd84b38f5b207ab95f68800e">_info</a>-><a class="code" href="struct_i_d3___header_1_1_info.html#a143cc6c3033679a15f0f6359732a6eb3">extended_bytes</a>;
<a name="l00060"></a>00060 }
<a name="l00061"></a>00061
<a name="l00062"></a>00062 <span class="keywordflow">return</span> bytesUsed;
<a name="l00063"></a>00063 }
<a name="l00064"></a>00064
<a name="l00065"></a>00065
<a name="l00066"></a><a class="code" href="class_i_d3___tag_header.html#ad52a90ddf66bfff6fbf924747453af81">00066</a> <span class="keywordtype">void</span> <a class="code" href="class_i_d3___tag_header.html#ad52a90ddf66bfff6fbf924747453af81">ID3_TagHeader::Render</a>(<a class="code" href="class_i_d3___writer.html">ID3_Writer</a>& writer)<span class="keyword"> const</span>
<a name="l00067"></a>00067 <span class="keyword"></span>{
<a name="l00068"></a>00068 writer.<a class="code" href="class_i_d3___writer.html#a287fd94f06b37fb638029b904e6f1d42" title="Write up to len characters into buf and advance the internal position accordingly...">writeChars</a>((<a class="code" href="globals_8h.html#a65f85814a8290f9797005d3b28e7e5fc">uchar</a> *) <a class="code" href="class_i_d3___tag_header.html#a43bd89984ebf5777677d472a3fccaf3d">ID</a>, strlen(ID));
<a name="l00069"></a>00069
<a name="l00070"></a>00070 writer.<a class="code" href="class_i_d3___writer.html#a2fd7fda2100f38a45038b80de8ed4432" title="Write a single character and advance the internal position.">writeChar</a>(<a class="code" href="spec_8cpp.html#a9791b9b9639436f8bdeadcdf5b0afb01">ID3_V2SpecToVer</a>(<a class="code" href="globals_8h.html#a48b13eb6cb3c520195901516dee1e612a05369f9f8d36bd4d8ebfd5188f156f6b">ID3V2_LATEST</a>));
<a name="l00071"></a>00071 writer.<a class="code" href="class_i_d3___writer.html#a2fd7fda2100f38a45038b80de8ed4432" title="Write a single character and advance the internal position.">writeChar</a>(<a class="code" href="spec_8cpp.html#a1c744d3bdf1fc3cf2fd9e2c5700af223">ID3_V2SpecToRev</a>(<a class="code" href="globals_8h.html#a48b13eb6cb3c520195901516dee1e612a05369f9f8d36bd4d8ebfd5188f156f6b">ID3V2_LATEST</a>));
<a name="l00072"></a>00072
<a name="l00073"></a>00073 <span class="comment">// set the flags byte in the header</span>
<a name="l00074"></a>00074 writer.<a class="code" href="class_i_d3___writer.html#a2fd7fda2100f38a45038b80de8ed4432" title="Write a single character and advance the internal position.">writeChar</a>(static_cast<uchar>(<a class="code" href="class_i_d3___header.html#af566de5a6ab82c06c60a8a339efd99cb">_flags</a>.<a class="code" href="class_i_d3___flags.html#a1033f1c70975d4730c1682b46ca1ea94">get</a>() & <a class="code" href="globals_8h.html#a0702746ecb6d016a15f759948f39ef69">MASK8</a>));
<a name="l00075"></a>00075 <a class="code" href="namespacedami_1_1io.html#a0cb48ad8042a6726eea33481f6a92ee0">io::writeUInt28</a>(writer, this-><a class="code" href="class_i_d3___header.html#a79f72d5e938eeafe389a33649939aab3">GetDataSize</a>()); <span class="comment">//now includes the extended header</span>
<a name="l00076"></a>00076
<a name="l00077"></a>00077 <span class="comment">// now we render the extended header</span>
<a name="l00078"></a>00078 <span class="keywordflow">if</span> (<a class="code" href="class_i_d3___header.html#af566de5a6ab82c06c60a8a339efd99cb">_flags</a>.<a class="code" href="class_i_d3___flags.html#a8619935f1b6dc6bbb9806be12fc3eac5">test</a>(<a class="code" href="class_i_d3___tag_header.html#ad90e54cc492db00bded94b996c6030ccacd2716bfe516ac15d3e9d2fd45388203">HEADER_FLAG_EXTENDED</a>))
<a name="l00079"></a>00079 {
<a name="l00080"></a>00080 <span class="keywordflow">if</span> (this-><a class="code" href="class_i_d3___header.html#a08c242cc83e36074c30bc9f1b6468e56">GetSpec</a>() == <a class="code" href="globals_8h.html#a48b13eb6cb3c520195901516dee1e612a1882d42672435168a929dec16e329a24">ID3V2_4_0</a>)
<a name="l00081"></a>00081 {
<a name="l00082"></a>00082 <a class="code" href="namespacedami_1_1io.html#a0cb48ad8042a6726eea33481f6a92ee0">io::writeUInt28</a>(writer, 6); <span class="comment">//write 4 bytes of v2.4.0 ext header containing size '6'</span>
<a name="l00083"></a>00083 <a class="code" href="namespacedami_1_1io.html#aca584020fcdd2925490c52af0eca5dcb">io::writeBENumber</a>(writer, 1, 1); <span class="comment">//write that it has only one flag byte (value '1')</span>
<a name="l00084"></a>00084 <a class="code" href="namespacedami_1_1io.html#aca584020fcdd2925490c52af0eca5dcb">io::writeBENumber</a>(writer, 0, 1); <span class="comment">//write flag byte with value '0'</span>
<a name="l00085"></a>00085 }
<a name="l00086"></a>00086 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (this-><a class="code" href="class_i_d3___header.html#a08c242cc83e36074c30bc9f1b6468e56">GetSpec</a>() == <a class="code" href="globals_8h.html#a48b13eb6cb3c520195901516dee1e612af1a537f047f6947efbc735bd0685a9df">ID3V2_3_0</a>)
<a name="l00087"></a>00087 {
<a name="l00088"></a>00088 <a class="code" href="namespacedami_1_1io.html#aca584020fcdd2925490c52af0eca5dcb">io::writeBENumber</a>(writer, 6, <span class="keyword">sizeof</span>(uint32));
<a name="l00089"></a>00089 <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < 6; ++i)
<a name="l00090"></a>00090 {
<a name="l00091"></a>00091 <span class="keywordflow">if</span> (writer.<a class="code" href="class_i_d3___writer.html#a2fd7fda2100f38a45038b80de8ed4432" title="Write a single character and advance the internal position.">writeChar</a>(<span class="charliteral">'\0'</span>) == <a class="code" href="class_i_d3___writer.html#ad86a1c643939307f19d311d8e272a68b">ID3_Writer::END_OF_WRITER</a>)
<a name="l00092"></a>00092 {
<a name="l00093"></a>00093 <span class="keywordflow">break</span>;
<a name="l00094"></a>00094 }
<a name="l00095"></a>00095 }
<a name="l00096"></a>00096 }
<a name="l00097"></a>00097 <span class="comment">// else //not implemented</span>
<a name="l00098"></a>00098 }
<a name="l00099"></a>00099 }
<a name="l00100"></a>00100
<a name="l00101"></a><a class="code" href="class_i_d3___tag_header.html#a2e792b2e35d5163f51c8171e6bd8020d">00101</a> <span class="keywordtype">bool</span> <a class="code" href="class_i_d3___tag_header.html#a2e792b2e35d5163f51c8171e6bd8020d">ID3_TagHeader::Parse</a>(<a class="code" href="class_i_d3___reader.html">ID3_Reader</a>& reader)
<a name="l00102"></a>00102 {
<a name="l00103"></a>00103 <a class="code" href="classdami_1_1io_1_1_exit_trigger.html">io::ExitTrigger</a> et(reader);
<a name="l00104"></a>00104 <span class="keywordflow">if</span> (!<a class="code" href="class_i_d3___tag.html#abeaf68b668a689f2ce50094131b9183b" title="Analyses a buffer to determine if we have a valid ID3v2 tag header.">ID3_Tag::IsV2Tag</a>(reader))
<a name="l00105"></a>00105 {
<a name="l00106"></a>00106 ID3D_NOTICE( <span class="stringliteral">"ID3_TagHeader::Parse(): not an id3v2 header"</span> );
<a name="l00107"></a>00107 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00108"></a>00108 }
<a name="l00109"></a>00109
<a name="l00110"></a>00110 <a class="code" href="globals_8h.html#a65f85814a8290f9797005d3b28e7e5fc">uchar</a> <span class="keywordtype">id</span>[3];
<a name="l00111"></a>00111 reader.<a class="code" href="class_i_d3___reader.html#a271015a0481e80ca63bfea9ff9320a50" title="Read up to len characters into buf and advance the internal position accordingly...">readChars</a>(<span class="keywordtype">id</span>, 3);
<a name="l00112"></a>00112 <span class="comment">// The spec version is determined with the MAJOR and MINOR OFFSETs</span>
<a name="l00113"></a>00113 <a class="code" href="globals_8h.html#a65f85814a8290f9797005d3b28e7e5fc">uchar</a> major = reader.<a class="code" href="class_i_d3___reader.html#a36e43a57e3ff194ed6e0416c409fbed3" title="Read a single character and advance the internal position.">readChar</a>();
<a name="l00114"></a>00114 <a class="code" href="globals_8h.html#a65f85814a8290f9797005d3b28e7e5fc">uchar</a> minor = reader.<a class="code" href="class_i_d3___reader.html#a36e43a57e3ff194ed6e0416c409fbed3" title="Read a single character and advance the internal position.">readChar</a>();
<a name="l00115"></a>00115 this-><a class="code" href="class_i_d3___tag_header.html#a8c662dcf0cdb4a9ec5c06ee05b5210d4">SetSpec</a>(<a class="code" href="spec_8cpp.html#a524c18ac3e56647f77403d8393b1b5e0">ID3_VerRevToV2Spec</a>(major, minor));
<a name="l00116"></a>00116
<a name="l00117"></a>00117 <span class="comment">// Get the flags at the appropriate offset</span>
<a name="l00118"></a>00118 <a class="code" href="class_i_d3___header.html#af566de5a6ab82c06c60a8a339efd99cb">_flags</a>.<a class="code" href="class_i_d3___flags.html#a6aa5d0be84c92c189c777c6b77fdda06">set</a>(static_cast<ID3_Flags::TYPE>(reader.<a class="code" href="class_i_d3___reader.html#a36e43a57e3ff194ed6e0416c409fbed3" title="Read a single character and advance the internal position.">readChar</a>()));
<a name="l00119"></a>00119
<a name="l00120"></a>00120 <span class="comment">// set the data size</span>
<a name="l00121"></a>00121 this-><a class="code" href="class_i_d3___header.html#a59ca0d4289297b721cffdc1c33014d5c">SetDataSize</a>(<a class="code" href="namespacedami_1_1io.html#a34fe31bc8d1ac37a6a5f33b93abcd322">io::readUInt28</a>(reader));
<a name="l00122"></a>00122
<a name="l00123"></a>00123 <span class="keywordflow">if</span> (<a class="code" href="class_i_d3___header.html#af566de5a6ab82c06c60a8a339efd99cb">_flags</a>.<a class="code" href="class_i_d3___flags.html#a8619935f1b6dc6bbb9806be12fc3eac5">test</a>(<a class="code" href="class_i_d3___tag_header.html#ad90e54cc492db00bded94b996c6030ccacd2716bfe516ac15d3e9d2fd45388203">HEADER_FLAG_EXTENDED</a>) && this-><a class="code" href="class_i_d3___header.html#a08c242cc83e36074c30bc9f1b6468e56">GetSpec</a>() == <a class="code" href="globals_8h.html#a48b13eb6cb3c520195901516dee1e612a20e44406a184e6ae825e38dcf3980c4f">ID3V2_2_1</a>)
<a name="l00124"></a>00124 {
<a name="l00125"></a>00125 <span class="comment">//couldn't find anything about this in the draft specifying 2.2.1 -> http://www.id3.org/pipermail/id3v2/2000-April/000126.html</span>
<a name="l00126"></a>00126 <a class="code" href="class_i_d3___header.html#af566de5a6ab82c06c60a8a339efd99cb">_flags</a>.<a class="code" href="class_i_d3___flags.html#a6aa5d0be84c92c189c777c6b77fdda06">set</a>(<a class="code" href="class_i_d3___tag_header.html#ad90e54cc492db00bded94b996c6030ccacd2716bfe516ac15d3e9d2fd45388203">HEADER_FLAG_EXTENDED</a>, <span class="keyword">false</span>);
<a name="l00127"></a>00127 <a class="code" href="class_i_d3___header.html#aabd26d3bbd84b38f5b207ab95f68800e">_info</a>-><a class="code" href="struct_i_d3___header_1_1_info.html#a143cc6c3033679a15f0f6359732a6eb3">extended_bytes</a> = 0;
<a name="l00128"></a>00128 <span class="comment">// rest is checked at ParseExtended()</span>
<a name="l00129"></a>00129 }
<a name="l00130"></a>00130 et.<a class="code" href="classdami_1_1io_1_1_exit_trigger.html#af65edaf06b4439c97de06520e3903868">setExitPos</a>(reader.<a class="code" href="class_i_d3___reader.html#a232935e138e44ea49e5a289fb8d7ac94" title="Return the current position in the reader.">getCur</a>());
<a name="l00131"></a>00131 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00132"></a>00132 }
<a name="l00133"></a>00133
<a name="l00134"></a><a class="code" href="class_i_d3___tag_header.html#a3efb8ababe8761607ec93568f1de7705">00134</a> <span class="keywordtype">void</span> <a class="code" href="class_i_d3___tag_header.html#a3efb8ababe8761607ec93568f1de7705">ID3_TagHeader::ParseExtended</a>(<a class="code" href="class_i_d3___reader.html">ID3_Reader</a>& reader)
<a name="l00135"></a>00135 {
<a name="l00136"></a>00136 <span class="keywordflow">if</span> (this-><a class="code" href="class_i_d3___header.html#a08c242cc83e36074c30bc9f1b6468e56">GetSpec</a>() == <a class="code" href="globals_8h.html#a48b13eb6cb3c520195901516dee1e612af1a537f047f6947efbc735bd0685a9df">ID3V2_3_0</a>)
<a name="l00137"></a>00137 {
<a name="l00138"></a>00138 <span class="comment">/*</span>
<a name="l00139"></a>00139 <span class="comment"> Extended header size $xx xx xx xx</span>
<a name="l00140"></a>00140 <span class="comment"> Extended Flags $xx xx</span>
<a name="l00141"></a>00141 <span class="comment"> Size of padding $xx xx xx xx</span>
<a name="l00142"></a>00142 <span class="comment">*/</span>
<a name="l00143"></a>00143 <span class="comment">// skip over header size, we are not using it anyway, we calculate it</span>
<a name="l00144"></a>00144 reader.<a class="code" href="class_i_d3___reader.html#a1630f369cc7aa65a2279542715e9f483" title="Set the value of the current position for reading.">setCur</a>(reader.<a class="code" href="class_i_d3___reader.html#a232935e138e44ea49e5a289fb8d7ac94" title="Return the current position in the reader.">getCur</a>()+4); <span class="comment">//Extended header size</span>
<a name="l00145"></a>00145 <span class="comment">//io::readBENumber(reader, 4); //Extended header size</span>
<a name="l00146"></a>00146 uint16 tmpval = <a class="code" href="namespacedami_1_1io.html#a4795dfc73c82683365f2738567c1d805">io::readBENumber</a>(reader, 2); <span class="comment">//Extended Flags</span>
<a name="l00147"></a>00147 <span class="comment">// skip over padding size, we are not using it anyway</span>
<a name="l00148"></a>00148 reader.<a class="code" href="class_i_d3___reader.html#a1630f369cc7aa65a2279542715e9f483" title="Set the value of the current position for reading.">setCur</a>(reader.<a class="code" href="class_i_d3___reader.html#a232935e138e44ea49e5a289fb8d7ac94" title="Return the current position in the reader.">getCur</a>()+4); <span class="comment">//Size of padding</span>
<a name="l00149"></a>00149 <span class="comment">// io::readBENumber(reader, 4); //Size of padding</span>
<a name="l00150"></a>00150 <span class="keywordflow">if</span> (tmpval != 0) <span class="comment">//there is only one flag defined in ID3V2_3_0: crc</span>
<a name="l00151"></a>00151 {
<a name="l00152"></a>00152 <span class="comment">//skip over crc data, we are not using it anyway</span>
<a name="l00153"></a>00153 reader.<a class="code" href="class_i_d3___reader.html#a1630f369cc7aa65a2279542715e9f483" title="Set the value of the current position for reading.">setCur</a>(reader.<a class="code" href="class_i_d3___reader.html#a232935e138e44ea49e5a289fb8d7ac94" title="Return the current position in the reader.">getCur</a>()+4); <span class="comment">//Crc</span>
<a name="l00154"></a>00154 <span class="comment">//io::readBENumber(reader, 4); //Crc</span>
<a name="l00155"></a>00155 <a class="code" href="class_i_d3___header.html#aabd26d3bbd84b38f5b207ab95f68800e">_info</a>-><a class="code" href="struct_i_d3___header_1_1_info.html#a143cc6c3033679a15f0f6359732a6eb3">extended_bytes</a> = 14;
<a name="l00156"></a>00156 }
<a name="l00157"></a>00157 <span class="keywordflow">else</span>
<a name="l00158"></a>00158 <a class="code" href="class_i_d3___header.html#aabd26d3bbd84b38f5b207ab95f68800e">_info</a>-><a class="code" href="struct_i_d3___header_1_1_info.html#a143cc6c3033679a15f0f6359732a6eb3">extended_bytes</a> = 10;
<a name="l00159"></a>00159 }
<a name="l00160"></a>00160 <span class="keywordflow">if</span> (this-><a class="code" href="class_i_d3___header.html#a08c242cc83e36074c30bc9f1b6468e56">GetSpec</a>() == <a class="code" href="globals_8h.html#a48b13eb6cb3c520195901516dee1e612a1882d42672435168a929dec16e329a24">ID3V2_4_0</a>)
<a name="l00161"></a>00161 {
<a name="l00162"></a>00162 <span class="comment">/*</span>
<a name="l00163"></a>00163 <span class="comment"> Extended header size 4 * %0xxxxxxx</span>
<a name="l00164"></a>00164 <span class="comment"> Number of flag bytes $01</span>
<a name="l00165"></a>00165 <span class="comment"> Extended Flags $xx</span>
<a name="l00166"></a>00166 <span class="comment">*/</span>
<a name="l00167"></a>00167 uint16 i;
<a name="l00168"></a>00168 uint16 extrabytes;
<a name="l00169"></a>00169
<a name="l00170"></a>00170 <a class="code" href="namespacedami_1_1io.html#a34fe31bc8d1ac37a6a5f33b93abcd322">io::readUInt28</a>(reader);
<a name="l00171"></a>00171 <span class="keyword">const</span> <span class="keywordtype">int</span> extflagbytes = reader.<a class="code" href="class_i_d3___reader.html#a36e43a57e3ff194ed6e0416c409fbed3" title="Read a single character and advance the internal position.">readChar</a>(); <span class="comment">//Number of flag bytes</span>
<a name="l00172"></a>00172 <a class="code" href="class_i_d3___flags.html">ID3_Flags</a>* extflags[1]; <span class="comment">// ID3V2_4_0 has 1 flag byte, extflagbytes should be equal to 1</span>
<a name="l00173"></a>00173 <span class="keywordflow">for</span> (i = 0; i < extflagbytes; ++i)
<a name="l00174"></a>00174 {
<a name="l00175"></a>00175 extflags[i] = <span class="keyword">new</span> <a class="code" href="class_i_d3___flags.html">ID3_Flags</a>;
<a name="l00176"></a>00176 extflags[i]-><a class="code" href="class_i_d3___flags.html#a6aa5d0be84c92c189c777c6b77fdda06">set</a>(reader.<a class="code" href="class_i_d3___reader.html#a36e43a57e3ff194ed6e0416c409fbed3" title="Read a single character and advance the internal position.">readChar</a>()); <span class="comment">//flags</span>
<a name="l00177"></a>00177 }
<a name="l00178"></a>00178 extrabytes = 0;
<a name="l00179"></a>00179 <span class="comment">//extflags[0]->test(EXT_HEADER_FLAG_BIT1); // ID3V2_4_0 ext header flag bit 1 *should* be 0</span>
<a name="l00180"></a>00180 <span class="keywordflow">if</span> (extflags[0]->test(<a class="code" href="class_i_d3___tag_header.html#a9c1c390b03d246cc7537e385b4db5f7ea8935f14852531a70cf769b1adafffc41">EXT_HEADER_FLAG_BIT2</a>))
<a name="l00181"></a>00181 {
<a name="l00182"></a>00182 <span class="comment">// ID3V2_4_0 ext header flag bit 2 = Tag is an update</span>
<a name="l00183"></a>00183 <span class="comment">// read size</span>
<a name="l00184"></a>00184 extrabytes += 1; <span class="comment">// add a byte for the char containing the extflagdatasize</span>
<a name="l00185"></a>00185 <span class="keyword">const</span> <span class="keywordtype">int</span> extheaderflagdatasize = reader.<a class="code" href="class_i_d3___reader.html#a36e43a57e3ff194ed6e0416c409fbed3" title="Read a single character and advance the internal position.">readChar</a>();
<a name="l00186"></a>00186 extrabytes += extheaderflagdatasize;
<a name="l00187"></a>00187 <span class="comment">// Set the cursor right; we are not parsing the data, no-one is using extended flags anyway</span>
<a name="l00188"></a>00188 reader.<a class="code" href="class_i_d3___reader.html#a1630f369cc7aa65a2279542715e9f483" title="Set the value of the current position for reading.">setCur</a>(reader.<a class="code" href="class_i_d3___reader.html#a232935e138e44ea49e5a289fb8d7ac94" title="Return the current position in the reader.">getCur</a>() + extheaderflagdatasize);
<a name="l00189"></a>00189 <span class="comment">//reader.readChars(buf, extheaderflagdatasize); //buf should be at least 127 bytes = max extended header flagdata size</span>
<a name="l00190"></a>00190 }
<a name="l00191"></a>00191 <span class="keywordflow">if</span> (extflags[0]->test(<a class="code" href="class_i_d3___tag_header.html#a9c1c390b03d246cc7537e385b4db5f7eae4c496bee5850327e849d680945ceab3">EXT_HEADER_FLAG_BIT3</a>))
<a name="l00192"></a>00192 {
<a name="l00193"></a>00193 <span class="comment">// ID3V2_4_0 ext header flag bit 3 = CRC data present</span>
<a name="l00194"></a>00194 <span class="comment">// read size</span>
<a name="l00195"></a>00195 extrabytes += 1; <span class="comment">// add a byte for the char containing the extflagdatasize</span>
<a name="l00196"></a>00196 <span class="keyword">const</span> <span class="keywordtype">int</span> extheaderflagdatasize = reader.<a class="code" href="class_i_d3___reader.html#a36e43a57e3ff194ed6e0416c409fbed3" title="Read a single character and advance the internal position.">readChar</a>();
<a name="l00197"></a>00197 extrabytes += extheaderflagdatasize;
<a name="l00198"></a>00198 <span class="comment">// Set the cursor right; we are not parsing the data, no-one is using extended flags anyway</span>
<a name="l00199"></a>00199 reader.<a class="code" href="class_i_d3___reader.html#a1630f369cc7aa65a2279542715e9f483" title="Set the value of the current position for reading.">setCur</a>(reader.<a class="code" href="class_i_d3___reader.html#a232935e138e44ea49e5a289fb8d7ac94" title="Return the current position in the reader.">getCur</a>() + extheaderflagdatasize);
<a name="l00200"></a>00200 <span class="comment">//reader.readChars(buf, extheaderflagdatasize); //buf should be at least 127 bytes = max extended header flagdata size</span>
<a name="l00201"></a>00201 }
<a name="l00202"></a>00202 <span class="keywordflow">if</span> (extflags[0]->test(<a class="code" href="class_i_d3___tag_header.html#a9c1c390b03d246cc7537e385b4db5f7ea20ef259525d9d739aece67a2b46d8908">EXT_HEADER_FLAG_BIT4</a>))
<a name="l00203"></a>00203 {
<a name="l00204"></a>00204 <span class="comment">// ID3V2_4_0 ext header flag bit 4 = Tag restrictions</span>
<a name="l00205"></a>00205 <span class="comment">// read size</span>
<a name="l00206"></a>00206 extrabytes += 1; <span class="comment">// add a byte for the char containing the extflagdatasize</span>
<a name="l00207"></a>00207 <span class="keyword">const</span> <span class="keywordtype">int</span> extheaderflagdatasize = reader.<a class="code" href="class_i_d3___reader.html#a36e43a57e3ff194ed6e0416c409fbed3" title="Read a single character and advance the internal position.">readChar</a>();
<a name="l00208"></a>00208 extrabytes += extheaderflagdatasize;
<a name="l00209"></a>00209 <span class="comment">// Set the cursor right; we are not parsing the data, no-one is using extended flags anyway</span>
<a name="l00210"></a>00210 reader.<a class="code" href="class_i_d3___reader.html#a1630f369cc7aa65a2279542715e9f483" title="Set the value of the current position for reading.">setCur</a>(reader.<a class="code" href="class_i_d3___reader.html#a232935e138e44ea49e5a289fb8d7ac94" title="Return the current position in the reader.">getCur</a>() + extheaderflagdatasize);
<a name="l00211"></a>00211 <span class="comment">//reader.readChars(buf, extheaderflagdatasize); //buf should be at least 127 bytes = max extended header flagdata size</span>
<a name="l00212"></a>00212 }
<a name="l00213"></a>00213 <a class="code" href="class_i_d3___header.html#aabd26d3bbd84b38f5b207ab95f68800e">_info</a>-><a class="code" href="struct_i_d3___header_1_1_info.html#a143cc6c3033679a15f0f6359732a6eb3">extended_bytes</a> = 5 + extflagbytes + extrabytes;
<a name="l00214"></a>00214 }
<a name="l00215"></a>00215 <span class="comment">// a bit unorthodox, but since we are not using any of the extended header, but were merely</span>
<a name="l00216"></a>00216 <span class="comment">// parsing it to get the cursor right, we delete it. Be Gone !</span>
<a name="l00217"></a>00217 <a class="code" href="class_i_d3___header.html#af566de5a6ab82c06c60a8a339efd99cb">_flags</a>.<a class="code" href="class_i_d3___flags.html#a6aa5d0be84c92c189c777c6b77fdda06">set</a>(<a class="code" href="class_i_d3___tag_header.html#ad90e54cc492db00bded94b996c6030ccacd2716bfe516ac15d3e9d2fd45388203">HEADER_FLAG_EXTENDED</a>, <span class="keyword">false</span>);
<a name="l00218"></a>00218 <span class="keywordflow">if</span> (<a class="code" href="class_i_d3___header.html#aabd26d3bbd84b38f5b207ab95f68800e">_info</a>)
<a name="l00219"></a>00219 {
<a name="l00220"></a>00220 <a class="code" href="class_i_d3___header.html#a92527e1c9963544a8d92df7a216b5e87">_data_size</a> -= <a class="code" href="class_i_d3___header.html#aabd26d3bbd84b38f5b207ab95f68800e">_info</a>-><a class="code" href="struct_i_d3___header_1_1_info.html#a143cc6c3033679a15f0f6359732a6eb3">extended_bytes</a>;
<a name="l00221"></a>00221 <a class="code" href="class_i_d3___header.html#aabd26d3bbd84b38f5b207ab95f68800e">_info</a>-><a class="code" href="struct_i_d3___header_1_1_info.html#a143cc6c3033679a15f0f6359732a6eb3">extended_bytes</a> = 0;
<a name="l00222"></a>00222 }<span class="comment">//else there is a tag with a higher or lower version than supported</span>
<a name="l00223"></a>00223 }
<a name="l00224"></a>00224
</pre></div></div>
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