333 lines
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333 lines
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<div id="projectname">Interface Technology Basics<span id="projectnumber"> VST 3.8</span>
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<div id="projectbrief">SDK for developing VST plug-in</div>
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<a href="#pub-methods">Public Member Functions</a> |
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<div class="headertitle"><div class="title">FUnknown Class Reference<span class="mlabels"><span class="mlabel abstract">abstract</span></span><div class="ingroups"><a class="el" href="group__pluginBase.html">Basic Interfaces</a></div></div></div>
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<p>The basic interface of all interfaces.
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<p><code>#include <funknown.h></code></p>
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<img id="dynsection-0-trigger" src="closed.png" alt="+"/> Inheritance diagram for FUnknown:</div>
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<table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="pub-methods" name="pub-methods"></a>
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Public Member Functions</h2></td></tr>
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<tr class="memitem:a4199134d0669bfa92b7419dac14c01a7" id="r_a4199134d0669bfa92b7419dac14c01a7"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="group__smtgtypedef.html#ga902761e005a6252e538c766de48fc957">tresult</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="#a4199134d0669bfa92b7419dac14c01a7">queryInterface</a> (const <a class="el" href="group__pluginBase.html#ga6935af93744bfe4ecc455f274ef1ec36">TUID</a> _iid, void **obj)=0</td></tr>
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<tr class="memdesc:a4199134d0669bfa92b7419dac14c01a7"><td class="mdescLeft"> </td><td class="mdescRight">Query for a pointer to the specified interface. <br /></td></tr>
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<tr class="separator:a4199134d0669bfa92b7419dac14c01a7"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:aaa3c5a2a5410d41153d7f5e3f4e0a635" id="r_aaa3c5a2a5410d41153d7f5e3f4e0a635"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="group__smtgtypedef.html#gacbd4acd0d29e2d6c43104827f77d9cd2">uint32</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="#aaa3c5a2a5410d41153d7f5e3f4e0a635">addRef</a> ()=0</td></tr>
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<tr class="memdesc:aaa3c5a2a5410d41153d7f5e3f4e0a635"><td class="mdescLeft"> </td><td class="mdescRight">Adds a reference and returns the new reference count. <br /></td></tr>
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<tr class="separator:aaa3c5a2a5410d41153d7f5e3f4e0a635"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a58847c78bf6142f01ce214c2802cb146" id="r_a58847c78bf6142f01ce214c2802cb146"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="group__smtgtypedef.html#gacbd4acd0d29e2d6c43104827f77d9cd2">uint32</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="#a58847c78bf6142f01ce214c2802cb146">release</a> ()=0</td></tr>
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<tr class="memdesc:a58847c78bf6142f01ce214c2802cb146"><td class="mdescLeft"> </td><td class="mdescRight">Releases a reference and returns the new reference count. <br /></td></tr>
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<tr class="separator:a58847c78bf6142f01ce214c2802cb146"><td class="memSeparator" colspan="2"> </td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="pub-static-attribs" name="pub-static-attribs"></a>
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Static Public Attributes</h2></td></tr>
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<tr class="memitem:a07978c93295b03d09c4bc97aa12e9c60" id="r_a07978c93295b03d09c4bc97aa12e9c60"><td class="memItemLeft" align="right" valign="top">static const <a class="el" href="classSteinberg_1_1FUID.html">FUID</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="#a07978c93295b03d09c4bc97aa12e9c60">iid</a></td></tr>
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<tr class="separator:a07978c93295b03d09c4bc97aa12e9c60"><td class="memSeparator" colspan="2"> </td></tr>
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</table>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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<div class="textblock"><p>The basic interface of all interfaces. </p>
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<ul>
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<li>The <a class="el" href="#a4199134d0669bfa92b7419dac14c01a7" title="Query for a pointer to the specified interface.">FUnknown::queryInterface</a> method is used to retrieve pointers to other interfaces of the object.</li>
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<li><a class="el" href="#aaa3c5a2a5410d41153d7f5e3f4e0a635" title="Adds a reference and returns the new reference count.">FUnknown::addRef</a> and <a class="el" href="#a58847c78bf6142f01ce214c2802cb146" title="Releases a reference and returns the new reference count.">FUnknown::release</a> manage the lifetime of the object. If no more references exist, the object is destroyed in memory.</li>
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</ul>
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<p>Interfaces are identified by 16 byte Globally Unique Identifiers. The SDK provides a class called <a class="el" href="classSteinberg_1_1FUID.html" title="Handling 16 Byte Globally Unique Identifiers.">FUID</a> for this purpose.</p>
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<p>howtoClass </p>
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</div><h2 class="groupheader">Member Function Documentation</h2>
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<a id="a4199134d0669bfa92b7419dac14c01a7" name="a4199134d0669bfa92b7419dac14c01a7"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a4199134d0669bfa92b7419dac14c01a7">◆ </a></span>queryInterface()</h2>
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<div class="memitem">
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<div class="memproto">
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<table class="mlabels">
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<td class="memname">virtual <a class="el" href="group__smtgtypedef.html#ga902761e005a6252e538c766de48fc957">tresult</a> queryInterface </td>
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<td>(</td>
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<td class="paramtype">const <a class="el" href="group__pluginBase.html#ga6935af93744bfe4ecc455f274ef1ec36">TUID</a></td> <td class="paramname"><span class="paramname"><em>_iid</em></span>, </td>
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<span class="mlabels"><span class="mlabel pure-virtual">pure virtual</span></span> </td>
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<p>Query for a pointer to the specified interface. </p>
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<p>Returns kResultOk on success or kNoInterface if the object does not implement the interface. The object has to call addRef when returning an interface. </p><dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">_iid</td><td>: (in) 16 Byte interface identifier (-> <a class="el" href="classSteinberg_1_1FUID.html" title="Handling 16 Byte Globally Unique Identifiers.">FUID</a>) </td></tr>
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<tr><td class="paramname">obj</td><td>: (out) On return, *obj points to the requested interface </td></tr>
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<h2 class="memtitle"><span class="permalink"><a href="#aaa3c5a2a5410d41153d7f5e3f4e0a635">◆ </a></span>addRef()</h2>
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<td class="memname">virtual <a class="el" href="group__smtgtypedef.html#gacbd4acd0d29e2d6c43104827f77d9cd2">uint32</a> addRef </td>
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<td>(</td>
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<td class="paramname"><span class="paramname"><em></em></span></td><td>)</td>
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<td></td>
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<span class="mlabels"><span class="mlabel pure-virtual">pure virtual</span></span> </td>
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<p>Adds a reference and returns the new reference count. </p>
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<dl class="section user"><dt>Remarks:</dt><dd>The initial reference count after creating an object is 1. </dd></dl>
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<a id="a58847c78bf6142f01ce214c2802cb146" name="a58847c78bf6142f01ce214c2802cb146"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a58847c78bf6142f01ce214c2802cb146">◆ </a></span>release()</h2>
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<td class="memname">virtual <a class="el" href="group__smtgtypedef.html#gacbd4acd0d29e2d6c43104827f77d9cd2">uint32</a> release </td>
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<td>(</td>
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<td class="paramname"><span class="paramname"><em></em></span></td><td>)</td>
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<td></td>
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<span class="mlabels"><span class="mlabel pure-virtual">pure virtual</span></span> </td>
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<p>Releases a reference and returns the new reference count. </p>
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<p>If the reference count reaches zero, the object will be destroyed in memory. </p>
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</div>
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<h2 class="groupheader">Member Data Documentation</h2>
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<a id="a07978c93295b03d09c4bc97aa12e9c60" name="a07978c93295b03d09c4bc97aa12e9c60"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a07978c93295b03d09c4bc97aa12e9c60">◆ </a></span>iid</h2>
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<td class="memname">const::Steinberg::FUID iid</td>
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<span class="mlabels"><span class="mlabel static">static</span></span> </td>
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Copyright ©<span id="year"></span> <a href="http://www.steinberg.net" target="_blank"><u>Steinberg Media Technologies GmbH</u></a>.
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All Rights Reserved. This documentation is under this <a href="http://www.steinberg.net/sdklicenses" target="_blank"><u>license</u></a>.
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