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| <tr><td colspan="5" class="shortcuts"> |
| <a href="#gst-plugins-base-libs-gstvideosink.synopsis" class="shortcut">Top</a> |
| | |
| <a href="#gst-plugins-base-libs-gstvideosink.description" class="shortcut">Description</a> |
| | |
| <a href="#gst-plugins-base-libs-gstvideosink.object-hierarchy" class="shortcut">Object Hierarchy</a> |
| | |
| <a href="#gst-plugins-base-libs-gstvideosink.properties" class="shortcut">Properties</a> |
| </td></tr> |
| </table> |
| <div class="refentry"> |
| <a name="gst-plugins-base-libs-gstvideosink"></a><div class="titlepage"></div> |
| <div class="refnamediv"><table width="100%"><tr> |
| <td valign="top"> |
| <h2><span class="refentrytitle"><a name="gst-plugins-base-libs-gstvideosink.top_of_page"></a>gstvideosink</span></h2> |
| <p>gstvideosink — Base class for video sinks</p> |
| </td> |
| <td valign="top" align="right"></td> |
| </tr></table></div> |
| <div class="refsynopsisdiv"> |
| <a name="gst-plugins-base-libs-gstvideosink.synopsis"></a><h2>Synopsis</h2> |
| <a name="GstVideoSink"></a><pre class="synopsis"> |
| #include <gst/video/gstvideosink.h> |
| |
| struct <a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoSink-struct" title="struct GstVideoSink">GstVideoSink</a>; |
| struct <a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoSinkClass" title="struct GstVideoSinkClass">GstVideoSinkClass</a>; |
| struct <a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoRectangle" title="struct GstVideoRectangle">GstVideoRectangle</a>; |
| #define <a class="link" href="gst-plugins-base-libs-gstvideosink.html#GST-VIDEO-SINK-HEIGHT:CAPS" title="GST_VIDEO_SINK_HEIGHT()">GST_VIDEO_SINK_HEIGHT</a> (obj) |
| #define <a class="link" href="gst-plugins-base-libs-gstvideosink.html#GST-VIDEO-SINK-PAD:CAPS" title="GST_VIDEO_SINK_PAD()">GST_VIDEO_SINK_PAD</a> (obj) |
| #define <a class="link" href="gst-plugins-base-libs-gstvideosink.html#GST-VIDEO-SINK-WIDTH:CAPS" title="GST_VIDEO_SINK_WIDTH()">GST_VIDEO_SINK_WIDTH</a> (obj) |
| <span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstvideosink.html#gst-video-sink-center-rect" title="gst_video_sink_center_rect ()">gst_video_sink_center_rect</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoRectangle" title="struct GstVideoRectangle"><span class="type">GstVideoRectangle</span></a> src</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoRectangle" title="struct GstVideoRectangle"><span class="type">GstVideoRectangle</span></a> dst</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoRectangle" title="struct GstVideoRectangle"><span class="type">GstVideoRectangle</span></a> *result</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> scaling</code></em>); |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstvideosink.object-hierarchy"></a><h2>Object Hierarchy</h2> |
| <pre class="synopsis"> |
| <a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject">GObject</a> |
| +----<a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a> |
| +----<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstObject.html">GstObject</a> |
| +----<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstElement.html">GstElement</a> |
| +----<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-libs/html/GstBaseSink.html">GstBaseSink</a> |
| +----GstVideoSink |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstvideosink.properties"></a><h2>Properties</h2> |
| <pre class="synopsis"> |
| "<a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoSink--show-preroll-frame" title='The "show-preroll-frame" property'>show-preroll-frame</a>" <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write / Construct |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstvideosink.description"></a><h2>Description</h2> |
| <p> |
| </p> |
| <div class="refsect2"> |
| <a name="id-1.2.14.7.6.2.1"></a><p> |
| Provides useful functions and a base class for video sinks. |
| </p> |
| <p> |
| GstVideoSink will configure the default base sink to drop frames that |
| arrive later than 20ms as this is considered the default threshold for |
| observing out-of-sync frames. |
| </p> |
| </div> |
| <p> |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstvideosink.details"></a><h2>Details</h2> |
| <div class="refsect2"> |
| <a name="GstVideoSink-struct"></a><h3>struct GstVideoSink</h3> |
| <pre class="programlisting">struct GstVideoSink { |
| gint width, height; |
| }; |
| </pre> |
| <p> |
| The video sink instance structure. Derived video sinks should set the |
| <em class="parameter"><code>height</code></em> and <em class="parameter"><code>width</code></em> members. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstVideoSink-struct.width"></a>width</code></em>;</span></p></td> |
| <td>video width (derived class needs to set this)</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstVideoSink-struct.height"></a>height</code></em>;</span></p></td> |
| <td>video height (derived class needs to set this)</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstVideoSinkClass"></a><h3>struct GstVideoSinkClass</h3> |
| <pre class="programlisting">struct GstVideoSinkClass { |
| GstBaseSinkClass parent_class; |
| |
| GstFlowReturn (*show_frame) (GstVideoSink *video_sink, GstBuffer *buf); |
| }; |
| </pre> |
| <p> |
| The video sink class structure. Derived classes should override the |
| <em class="parameter"><code>show_frame</code></em> virtual function. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-libs/html/GstBaseSink.html#GstBaseSinkClass"><span class="type">GstBaseSinkClass</span></a> <em class="structfield"><code><a name="GstVideoSinkClass.parent-class"></a>parent_class</code></em>;</span></p></td> |
| <td>the parent class structure</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstVideoSinkClass.show-frame"></a>show_frame</code></em> ()</span></p></td> |
| <td>render a video frame. Maps to <code class="function">GstBaseSinkClass.render()</code> and |
| <code class="function">GstBaseSinkClass.preroll()</code> vfuncs. Rendering during preroll will be |
| suppressed if the <a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoSink--show-preroll-frame" title='The "show-preroll-frame" property'><span class="type">"show-preroll-frame"</span></a> property is set to |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstVideoRectangle"></a><h3>struct GstVideoRectangle</h3> |
| <pre class="programlisting">struct GstVideoRectangle { |
| gint x; |
| gint y; |
| gint w; |
| gint h; |
| }; |
| </pre> |
| <p> |
| Helper structure representing a rectangular area. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstVideoRectangle.x"></a>x</code></em>;</span></p></td> |
| <td>X coordinate of rectangle's top-left point</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstVideoRectangle.y"></a>y</code></em>;</span></p></td> |
| <td>Y coordinate of rectangle's top-left point</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstVideoRectangle.w"></a>w</code></em>;</span></p></td> |
| <td>width of the rectangle</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstVideoRectangle.h"></a>h</code></em>;</span></p></td> |
| <td>height of the rectangle</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GST-VIDEO-SINK-HEIGHT:CAPS"></a><h3>GST_VIDEO_SINK_HEIGHT()</h3> |
| <pre class="programlisting">#define GST_VIDEO_SINK_HEIGHT(obj) (GST_VIDEO_SINK_CAST (obj)->height) |
| </pre> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GST-VIDEO-SINK-PAD:CAPS"></a><h3>GST_VIDEO_SINK_PAD()</h3> |
| <pre class="programlisting">#define GST_VIDEO_SINK_PAD(obj) GST_BASE_SINK_PAD(obj) |
| </pre> |
| <p> |
| Get the sink <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPad.html"><span class="type">GstPad</span></a> of <em class="parameter"><code>obj</code></em>. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody><tr> |
| <td><p><span class="term"><em class="parameter"><code>obj</code></em> :</span></p></td> |
| <td>a <a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoSink"><span class="type">GstVideoSink</span></a> |
| </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GST-VIDEO-SINK-WIDTH:CAPS"></a><h3>GST_VIDEO_SINK_WIDTH()</h3> |
| <pre class="programlisting">#define GST_VIDEO_SINK_WIDTH(obj) (GST_VIDEO_SINK_CAST (obj)->width) |
| </pre> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-sink-center-rect"></a><h3>gst_video_sink_center_rect ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> gst_video_sink_center_rect (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoRectangle" title="struct GstVideoRectangle"><span class="type">GstVideoRectangle</span></a> src</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoRectangle" title="struct GstVideoRectangle"><span class="type">GstVideoRectangle</span></a> dst</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoRectangle" title="struct GstVideoRectangle"><span class="type">GstVideoRectangle</span></a> *result</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> scaling</code></em>);</pre> |
| <p> |
| Takes <em class="parameter"><code>src</code></em> rectangle and position it at the center of <em class="parameter"><code>dst</code></em> rectangle with or |
| without <em class="parameter"><code>scaling</code></em>. It handles clipping if the <em class="parameter"><code>src</code></em> rectangle is bigger than |
| the <em class="parameter"><code>dst</code></em> one and <em class="parameter"><code>scaling</code></em> is set to FALSE. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>src</code></em> :</span></p></td> |
| <td>the <a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoRectangle" title="struct GstVideoRectangle"><span class="type">GstVideoRectangle</span></a> describing the source area</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>dst</code></em> :</span></p></td> |
| <td>the <a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoRectangle" title="struct GstVideoRectangle"><span class="type">GstVideoRectangle</span></a> describing the destination area</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>result</code></em> :</span></p></td> |
| <td>a pointer to a <a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoRectangle" title="struct GstVideoRectangle"><span class="type">GstVideoRectangle</span></a> which will receive the result area</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>scaling</code></em> :</span></p></td> |
| <td>a <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> indicating if scaling should be applied or not</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstvideosink.property-details"></a><h2>Property Details</h2> |
| <div class="refsect2"> |
| <a name="GstVideoSink--show-preroll-frame"></a><h3>The <code class="literal">"show-preroll-frame"</code> property</h3> |
| <pre class="programlisting"> "show-preroll-frame" <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write / Construct</pre> |
| <p> |
| Whether to show video frames during preroll. If set to <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><span class="type">FALSE</span></a>, video |
| frames will only be rendered in PLAYING state. |
| </p> |
| <p>Default value: TRUE</p> |
| </div> |
| </div> |
| </div> |
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