| <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> |
| <html> |
| <head> |
| <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> |
| <title>identity: GStreamer Core Plugins 1.0 Plugins Reference Manual</title> |
| <meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> |
| <link rel="home" href="index.html" title="GStreamer Core Plugins 1.0 Plugins Reference Manual"> |
| <link rel="up" href="ch01.html" title="gstreamer Elements"> |
| <link rel="prev" href="gstreamer-plugins-funnel.html" title="funnel"> |
| <link rel="next" href="gstreamer-plugins-input-selector.html" title="input-selector"> |
| <meta name="generator" content="GTK-Doc V1.25 (XML mode)"> |
| <link rel="stylesheet" href="style.css" type="text/css"> |
| </head> |
| <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> |
| <table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle"> |
| <td width="100%" align="left" class="shortcuts"> |
| <a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span> |
| <a href="#gstreamer-plugins-identity.description" class="shortcut">Description</a></span><span id="nav_hierarchy"> <span class="dim">|</span> |
| <a href="#gstreamer-plugins-identity.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_properties"> <span class="dim">|</span> |
| <a href="#gstreamer-plugins-identity.properties" class="shortcut">Properties</a></span><span id="nav_signals"> <span class="dim">|</span> |
| <a href="#gstreamer-plugins-identity.signals" class="shortcut">Signals</a></span> |
| </td> |
| <td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td> |
| <td><a accesskey="u" href="ch01.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td> |
| <td><a accesskey="p" href="gstreamer-plugins-funnel.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td> |
| <td><a accesskey="n" href="gstreamer-plugins-input-selector.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td> |
| </tr></table> |
| <div class="refentry"> |
| <a name="gstreamer-plugins-identity"></a><div class="titlepage"></div> |
| <div class="refnamediv"><table width="100%"><tr> |
| <td valign="top"> |
| <h2><span class="refentrytitle"><a name="gstreamer-plugins-identity.top_of_page"></a>identity</span></h2> |
| <p>identity</p> |
| </td> |
| <td class="gallery_image" valign="top" align="right"></td> |
| </tr></table></div> |
| <div class="refsect1"> |
| <a name="gstreamer-plugins-identity.properties"></a><h2>Properties</h2> |
| <div class="informaltable"><table class="informaltable" border="0"> |
| <colgroup> |
| <col width="150px" class="properties_type"> |
| <col width="300px" class="properties_name"> |
| <col width="200px" class="properties_flags"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="property_type"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td> |
| <td class="property_name"><a class="link" href="gstreamer-plugins-identity.html#GstIdentity--check-imperfect-offset" title="The “check-imperfect-offset” property">check-imperfect-offset</a></td> |
| <td class="property_flags">Read / Write</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td> |
| <td class="property_name"><a class="link" href="gstreamer-plugins-identity.html#GstIdentity--check-imperfect-timestamp" title="The “check-imperfect-timestamp” property">check-imperfect-timestamp</a></td> |
| <td class="property_flags">Read / Write</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a></td> |
| <td class="property_name"><a class="link" href="gstreamer-plugins-identity.html#GstIdentity--datarate" title="The “datarate” property">datarate</a></td> |
| <td class="property_flags">Read / Write</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gfloat"><span class="type">gfloat</span></a></td> |
| <td class="property_name"><a class="link" href="gstreamer-plugins-identity.html#GstIdentity--drop-probability" title="The “drop-probability” property">drop-probability</a></td> |
| <td class="property_flags">Read / Write</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td> |
| <td class="property_name"><a class="link" href="gstreamer-plugins-identity.html#GstIdentity--dump" title="The “dump” property">dump</a></td> |
| <td class="property_flags">Read / Write</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a></td> |
| <td class="property_name"><a class="link" href="gstreamer-plugins-identity.html#GstIdentity--error-after" title="The “error-after” property">error-after</a></td> |
| <td class="property_flags">Read / Write</td> |
| </tr> |
| <tr> |
| <td class="property_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *</td> |
| <td class="property_name"><a class="link" href="gstreamer-plugins-identity.html#GstIdentity--last-message" title="The “last-message” property">last-message</a></td> |
| <td class="property_flags">Read</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td> |
| <td class="property_name"><a class="link" href="gstreamer-plugins-identity.html#GstIdentity--signal-handoffs" title="The “signal-handoffs” property">signal-handoffs</a></td> |
| <td class="property_flags">Read / Write</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td> |
| <td class="property_name"><a class="link" href="gstreamer-plugins-identity.html#GstIdentity--silent" title="The “silent” property">silent</a></td> |
| <td class="property_flags">Read / Write</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td> |
| <td class="property_name"><a class="link" href="gstreamer-plugins-identity.html#GstIdentity--single-segment" title="The “single-segment” property">single-segment</a></td> |
| <td class="property_flags">Read / Write</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="type">guint</span></a></td> |
| <td class="property_name"><a class="link" href="gstreamer-plugins-identity.html#GstIdentity--sleep-time" title="The “sleep-time” property">sleep-time</a></td> |
| <td class="property_flags">Read / Write</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td> |
| <td class="property_name"><a class="link" href="gstreamer-plugins-identity.html#GstIdentity--sync" title="The “sync” property">sync</a></td> |
| <td class="property_flags">Read / Write</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="../html/GstBuffer.html#GstBufferFlags"><span class="type">GstBufferFlags</span></a></td> |
| <td class="property_name"><a class="link" href="gstreamer-plugins-identity.html#GstIdentity--drop-buffer-flags" title="The “drop-buffer-flags” property">drop-buffer-flags</a></td> |
| <td class="property_flags">Read / Write</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect1"> |
| <a name="gstreamer-plugins-identity.signals"></a><h2>Signals</h2> |
| <div class="informaltable"><table class="informaltable" border="0"> |
| <colgroup> |
| <col width="150px" class="signals_return"> |
| <col width="300px" class="signals_name"> |
| <col width="200px" class="signals_flags"> |
| </colgroup> |
| <tbody><tr> |
| <td class="signal_type"><span class="returnvalue">void</span></td> |
| <td class="signal_name"><a class="link" href="gstreamer-plugins-identity.html#GstIdentity-handoff" title="The “handoff” signal">handoff</a></td> |
| <td class="signal_flags"><a href="/usr/share/gtk-doc/html/gobjectgobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS">Run Last</a></td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <a name="GstIdentity"></a><div class="refsect1"> |
| <a name="gstreamer-plugins-identity.other"></a><h2>Types and Values</h2> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="name"> |
| <col class="description"> |
| </colgroup> |
| <tbody><tr> |
| <td class="datatype_keyword">struct</td> |
| <td class="function_name"><a class="link" href="gstreamer-plugins-identity.html#GstIdentity-struct" title="struct GstIdentity">GstIdentity</a></td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect1"> |
| <a name="gstreamer-plugins-identity.object-hierarchy"></a><h2>Object Hierarchy</h2> |
| <pre class="screen"> <a href="/usr/share/gtk-doc/html/gobjectgobject-The-Base-Object-Type.html#GObject-struct">GObject</a> |
| <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gobjectgobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a> |
| <span class="lineart">╰──</span> <a href="../html/GstObject.html#GstObject-struct">GstObject</a> |
| <span class="lineart">╰──</span> <a href="../html/GstElement.html#GstElement-struct">GstElement</a> |
| <span class="lineart">╰──</span> <a href="../html/GstBaseTransform.html#GstBaseTransform-struct">GstBaseTransform</a> |
| <span class="lineart">╰──</span> GstIdentity |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="gstreamer-plugins-identity.description"></a><h2>Description</h2> |
| <p>Dummy element that passes incoming data through unmodified. It has some |
| useful diagnostic functions, such as offset and timestamp checking.</p> |
| <div class="refsynopsisdiv"> |
| <h2>Synopsis</h2> |
| <div class="refsect2"> |
| <a name="id-1.2.12.8.3.1"></a><h3>Element Information</h3> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">plugin</span></p></td> |
| <td> |
| <a class="link" href="gstreamer-plugins-plugin-coreelements.html#plugin-coreelements">coreelements</a> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term">author</span></p></td> |
| <td>Erik Walthinsen <omega@cse.ogi.edu></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">class</span></p></td> |
| <td>Generic</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="id-1.2.12.8.3.2"></a><h3>Element Pads</h3> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">name</span></p></td> |
| <td>sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">direction</span></p></td> |
| <td>sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">presence</span></p></td> |
| <td>always</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">details</span></p></td> |
| <td>ANY</td> |
| </tr> |
| </tbody> |
| </table></div> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">name</span></p></td> |
| <td>src</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">direction</span></p></td> |
| <td>source</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">presence</span></p></td> |
| <td>always</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">details</span></p></td> |
| <td>ANY</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="gstreamer-plugins-identity.functions_details"></a><h2>Functions</h2> |
| <p></p> |
| </div> |
| <div class="refsect1"> |
| <a name="gstreamer-plugins-identity.other_details"></a><h2>Types and Values</h2> |
| <div class="refsect2"> |
| <a name="GstIdentity-struct"></a><h3>struct GstIdentity</h3> |
| <pre class="programlisting">struct GstIdentity;</pre> |
| <p>Opaque <a class="link" href="gstreamer-plugins-identity.html#GstIdentity"><span class="type">GstIdentity</span></a> data structure</p> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="gstreamer-plugins-identity.property-details"></a><h2>Property Details</h2> |
| <div class="refsect2"> |
| <a name="GstIdentity--check-imperfect-offset"></a><h3>The <code class="literal">“check-imperfect-offset”</code> property</h3> |
| <pre class="programlisting"> “check-imperfect-offset” <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> |
| <p>Send element messages if offset and offset_end do not match up.</p> |
| <p>Flags: Read / Write</p> |
| <p>Default value: FALSE</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstIdentity--check-imperfect-timestamp"></a><h3>The <code class="literal">“check-imperfect-timestamp”</code> property</h3> |
| <pre class="programlisting"> “check-imperfect-timestamp” <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> |
| <p>Send element messages if timestamps and durations do not match up.</p> |
| <p>Flags: Read / Write</p> |
| <p>Default value: FALSE</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstIdentity--datarate"></a><h3>The <code class="literal">“datarate”</code> property</h3> |
| <pre class="programlisting"> “datarate” <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a></pre> |
| <p>(Re)timestamps buffers with number of bytes per second (0 = inactive).</p> |
| <p>Flags: Read / Write</p> |
| <p>Allowed values: >= 0</p> |
| <p>Default value: 0</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstIdentity--drop-probability"></a><h3>The <code class="literal">“drop-probability”</code> property</h3> |
| <pre class="programlisting"> “drop-probability” <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gfloat"><span class="type">gfloat</span></a></pre> |
| <p>The Probability a buffer is dropped.</p> |
| <p>Flags: Read / Write</p> |
| <p>Allowed values: [0,1]</p> |
| <p>Default value: 0</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstIdentity--dump"></a><h3>The <code class="literal">“dump”</code> property</h3> |
| <pre class="programlisting"> “dump” <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> |
| <p>Dump buffer contents to stdout.</p> |
| <p>Flags: Read / Write</p> |
| <p>Default value: FALSE</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstIdentity--error-after"></a><h3>The <code class="literal">“error-after”</code> property</h3> |
| <pre class="programlisting"> “error-after” <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a></pre> |
| <p>Error after N buffers.</p> |
| <p>Flags: Read / Write</p> |
| <p>Default value: -1</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstIdentity--last-message"></a><h3>The <code class="literal">“last-message”</code> property</h3> |
| <pre class="programlisting"> “last-message” <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *</pre> |
| <p>last-message.</p> |
| <p>Flags: Read</p> |
| <p>Default value: NULL</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstIdentity--signal-handoffs"></a><h3>The <code class="literal">“signal-handoffs”</code> property</h3> |
| <pre class="programlisting"> “signal-handoffs” <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> |
| <p>If set to <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><span class="type">TRUE</span></a>, the identity will emit a handoff signal when handling a buffer. |
| When set to <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#FALSE:CAPS"><span class="type">FALSE</span></a>, no signal will be emitted, which might improve performance.</p> |
| <p>Flags: Read / Write</p> |
| <p>Default value: TRUE</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstIdentity--silent"></a><h3>The <code class="literal">“silent”</code> property</h3> |
| <pre class="programlisting"> “silent” <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> |
| <p>silent.</p> |
| <p>Flags: Read / Write</p> |
| <p>Default value: TRUE</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstIdentity--single-segment"></a><h3>The <code class="literal">“single-segment”</code> property</h3> |
| <pre class="programlisting"> “single-segment” <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> |
| <p>Timestamp buffers and eat segments so as to appear as one segment.</p> |
| <p>Flags: Read / Write</p> |
| <p>Default value: FALSE</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstIdentity--sleep-time"></a><h3>The <code class="literal">“sleep-time”</code> property</h3> |
| <pre class="programlisting"> “sleep-time” <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="type">guint</span></a></pre> |
| <p>Microseconds to sleep between processing.</p> |
| <p>Flags: Read / Write</p> |
| <p>Default value: 0</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstIdentity--sync"></a><h3>The <code class="literal">“sync”</code> property</h3> |
| <pre class="programlisting"> “sync” <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> |
| <p>Synchronize to pipeline clock.</p> |
| <p>Flags: Read / Write</p> |
| <p>Default value: FALSE</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstIdentity--drop-buffer-flags"></a><h3>The <code class="literal">“drop-buffer-flags”</code> property</h3> |
| <pre class="programlisting"> “drop-buffer-flags” <a href="../html/GstBuffer.html#GstBufferFlags"><span class="type">GstBufferFlags</span></a></pre> |
| <p>Drop buffers with the given flags.</p> |
| <p>Flags: Read / Write</p> |
| <p class="since">Since: 1.8</p> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="gstreamer-plugins-identity.signal-details"></a><h2>Signal Details</h2> |
| <div class="refsect2"> |
| <a name="GstIdentity-handoff"></a><h3>The <code class="literal">“handoff”</code> signal</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> |
| user_function (<a class="link" href="gstreamer-plugins-identity.html#GstIdentity"><span class="type">GstIdentity</span></a> *identity, |
| <a href="../html/GstBuffer.html#GstBuffer-struct"><span class="type">GstBuffer</span></a> *buffer, |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data)</pre> |
| <p>This signal gets emitted before passing the buffer downstream.</p> |
| <div class="refsect3"> |
| <a name="GstIdentity-handoff.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="parameter_name"><p>identity</p></td> |
| <td class="parameter_description"><p>the identity instance</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>buffer</p></td> |
| <td class="parameter_description"><p>the buffer that just has been received</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>pad</p></td> |
| <td class="parameter_description"><p>the pad that received it</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>user_data</p></td> |
| <td class="parameter_description"><p>user data set when the signal handler was connected.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <p>Flags: <a href="/usr/share/gtk-doc/html/gobjectgobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS">Run Last</a></p> |
| </div> |
| </div> |
| </div> |
| <div class="footer"> |
| <hr>Generated by GTK-Doc V1.25</div> |
| </body> |
| </html> |
