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| <a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span> | |
| <a href="#gst-plugins-base-libs-GstVideoScaler.description" class="shortcut">Description</a></span> | |
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| <div class="refentry"> | |
| <a name="gst-plugins-base-libs-GstVideoScaler"></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-GstVideoScaler.top_of_page"></a>GstVideoScaler</span></h2> | |
| <p>GstVideoScaler — Utility object for rescaling video frames</p> | |
| </td> | |
| <td class="gallery_image" valign="top" align="right"></td> | |
| </tr></table></div> | |
| <div class="refsect1"> | |
| <a name="gst-plugins-base-libs-GstVideoScaler.functions"></a><h2>Functions</h2> | |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> | |
| <colgroup> | |
| <col width="150px" class="functions_return"> | |
| <col class="functions_name"> | |
| </colgroup> | |
| <tbody> | |
| <tr> | |
| <td class="function_type"> | |
| <span class="returnvalue">void</span> | |
| </td> | |
| <td class="function_name"> | |
| <a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#gst-video-scaler-2d" title="gst_video_scaler_2d ()">gst_video_scaler_2d</a> <span class="c_punctuation">()</span> | |
| </td> | |
| </tr> | |
| <tr> | |
| <td class="function_type"> | |
| <a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScaler" title="GstVideoScaler"><span class="returnvalue">GstVideoScaler</span></a> * | |
| </td> | |
| <td class="function_name"> | |
| <a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#gst-video-scaler-combine-packed-YUV" title="gst_video_scaler_combine_packed_YUV ()">gst_video_scaler_combine_packed_YUV</a> <span class="c_punctuation">()</span> | |
| </td> | |
| </tr> | |
| <tr> | |
| <td class="function_type"> | |
| <span class="returnvalue">void</span> | |
| </td> | |
| <td class="function_name"> | |
| <a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#gst-video-scaler-free" title="gst_video_scaler_free ()">gst_video_scaler_free</a> <span class="c_punctuation">()</span> | |
| </td> | |
| </tr> | |
| <tr> | |
| <td class="function_type">const <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a> * | |
| </td> | |
| <td class="function_name"> | |
| <a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#gst-video-scaler-get-coeff" title="gst_video_scaler_get_coeff ()">gst_video_scaler_get_coeff</a> <span class="c_punctuation">()</span> | |
| </td> | |
| </tr> | |
| <tr> | |
| <td class="function_type"> | |
| <span class="returnvalue">void</span> | |
| </td> | |
| <td class="function_name"> | |
| <a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#gst-video-scaler-horizontal" title="gst_video_scaler_horizontal ()">gst_video_scaler_horizontal</a> <span class="c_punctuation">()</span> | |
| </td> | |
| </tr> | |
| <tr> | |
| <td class="function_type"> | |
| <a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScaler" title="GstVideoScaler"><span class="returnvalue">GstVideoScaler</span></a> * | |
| </td> | |
| <td class="function_name"> | |
| <a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#gst-video-scaler-new" title="gst_video_scaler_new ()">gst_video_scaler_new</a> <span class="c_punctuation">()</span> | |
| </td> | |
| </tr> | |
| <tr> | |
| <td class="function_type"> | |
| <span class="returnvalue">void</span> | |
| </td> | |
| <td class="function_name"> | |
| <a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#gst-video-scaler-vertical" title="gst_video_scaler_vertical ()">gst_video_scaler_vertical</a> <span class="c_punctuation">()</span> | |
| </td> | |
| </tr> | |
| </tbody> | |
| </table></div> | |
| </div> | |
| <div class="refsect1"> | |
| <a name="gst-plugins-base-libs-GstVideoScaler.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"> </td> | |
| <td class="function_name"><a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScaler" title="GstVideoScaler">GstVideoScaler</a></td> | |
| </tr> | |
| <tr> | |
| <td class="datatype_keyword">enum</td> | |
| <td class="function_name"><a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScalerFlags" title="enum GstVideoScalerFlags">GstVideoScalerFlags</a></td> | |
| </tr> | |
| </tbody> | |
| </table></div> | |
| </div> | |
| <div class="refsect1"> | |
| <a name="gst-plugins-base-libs-GstVideoScaler.includes"></a><h2>Includes</h2> | |
| <pre class="synopsis">#include <gst/video/video-scaler.h> | |
| </pre> | |
| </div> | |
| <div class="refsect1"> | |
| <a name="gst-plugins-base-libs-GstVideoScaler.description"></a><h2>Description</h2> | |
| <p><a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScaler" title="GstVideoScaler"><span class="type">GstVideoScaler</span></a> is a utility object for rescaling and resampling | |
| video frames using various interpolation / sampling methods.</p> | |
| </div> | |
| <div class="refsect1"> | |
| <a name="gst-plugins-base-libs-GstVideoScaler.functions_details"></a><h2>Functions</h2> | |
| <div class="refsect2"> | |
| <a name="gst-video-scaler-2d"></a><h3>gst_video_scaler_2d ()</h3> | |
| <pre class="programlisting"><span class="returnvalue">void</span> | |
| gst_video_scaler_2d (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScaler" title="GstVideoScaler"><span class="type">GstVideoScaler</span></a> *hscale</code></em>, | |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScaler" title="GstVideoScaler"><span class="type">GstVideoScaler</span></a> *vscale</code></em>, | |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideo.html#GstVideoFormat" title="enum GstVideoFormat"><span class="type">GstVideoFormat</span></a> format</code></em>, | |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> src</code></em>, | |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a> src_stride</code></em>, | |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> dest</code></em>, | |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a> dest_stride</code></em>, | |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="type">guint</span></a> x</code></em>, | |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="type">guint</span></a> y</code></em>, | |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="type">guint</span></a> width</code></em>, | |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="type">guint</span></a> height</code></em>);</pre> | |
| <p>Scale a rectangle of pixels in <em class="parameter"><code>src</code></em> | |
| with <em class="parameter"><code>src_stride</code></em> | |
| to <em class="parameter"><code>dest</code></em> | |
| with | |
| <em class="parameter"><code>dest_stride</code></em> | |
| using the horizontal scaler <em class="parameter"><code>hscaler</code></em> | |
| and the vertical | |
| scaler <em class="parameter"><code>vscale</code></em> | |
| .</p> | |
| <p>One or both of <em class="parameter"><code>hscale</code></em> | |
| and <em class="parameter"><code>vscale</code></em> | |
| can be NULL to only perform scaling in | |
| one dimension or do a copy without scaling.</p> | |
| <p><em class="parameter"><code>x</code></em> | |
| and <em class="parameter"><code>y</code></em> | |
| are the coordinates in the destination image to process.</p> | |
| <div class="refsect3"> | |
| <a name="gst-video-scaler-2d.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>hscale</p></td> | |
| <td class="parameter_description"><p>a horzontal <a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScaler" title="GstVideoScaler"><span class="type">GstVideoScaler</span></a></p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>vscale</p></td> | |
| <td class="parameter_description"><p>a vertical <a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScaler" title="GstVideoScaler"><span class="type">GstVideoScaler</span></a></p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>format</p></td> | |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideo.html#GstVideoFormat" title="enum GstVideoFormat"><span class="type">GstVideoFormat</span></a> for <em class="parameter"><code>srcs</code></em> | |
| and <em class="parameter"><code>dest</code></em> | |
| </p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>src</p></td> | |
| <td class="parameter_description"><p>source pixels</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>src_stride</p></td> | |
| <td class="parameter_description"><p>source pixels stride</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>dest</p></td> | |
| <td class="parameter_description"><p>destination pixels</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>dest_stride</p></td> | |
| <td class="parameter_description"><p>destination pixels stride</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>x</p></td> | |
| <td class="parameter_description"><p>the horizontal destination offset</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>y</p></td> | |
| <td class="parameter_description"><p>the vertical destination offset</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>width</p></td> | |
| <td class="parameter_description"><p>the number of output pixels to scale</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>height</p></td> | |
| <td class="parameter_description"><p>the number of output lines to scale</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| </tbody> | |
| </table></div> | |
| </div> | |
| </div> | |
| <hr> | |
| <div class="refsect2"> | |
| <a name="gst-video-scaler-combine-packed-YUV"></a><h3>gst_video_scaler_combine_packed_YUV ()</h3> | |
| <pre class="programlisting"><a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScaler" title="GstVideoScaler"><span class="returnvalue">GstVideoScaler</span></a> * | |
| gst_video_scaler_combine_packed_YUV (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScaler" title="GstVideoScaler"><span class="type">GstVideoScaler</span></a> *y_scale</code></em>, | |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScaler" title="GstVideoScaler"><span class="type">GstVideoScaler</span></a> *uv_scale</code></em>, | |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideo.html#GstVideoFormat" title="enum GstVideoFormat"><span class="type">GstVideoFormat</span></a> in_format</code></em>, | |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideo.html#GstVideoFormat" title="enum GstVideoFormat"><span class="type">GstVideoFormat</span></a> out_format</code></em>);</pre> | |
| <p>Combine a scaler for Y and UV into one scaler for the packed <em class="parameter"><code>format</code></em> | |
| .</p> | |
| <p><span class="annotation">[<acronym title="Exposed in C code, not necessarily available in other languages."><span class="acronym">skip</span></acronym>]</span></p> | |
| <div class="refsect3"> | |
| <a name="gst-video-scaler-combine-packed-YUV.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>y_scale</p></td> | |
| <td class="parameter_description"><p>a scaler for the Y component</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>uv_scale</p></td> | |
| <td class="parameter_description"><p>a scaler for the U and V components</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>in_format</p></td> | |
| <td class="parameter_description"><p>the input video format</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>out_format</p></td> | |
| <td class="parameter_description"><p>the output video format</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| </tbody> | |
| </table></div> | |
| </div> | |
| <div class="refsect3"> | |
| <a name="gst-video-scaler-combine-packed-YUV.returns"></a><h4>Returns</h4> | |
| <p> a new horizontal videoscaler for <em class="parameter"><code>format</code></em> | |
| .</p> | |
| </div> | |
| <p class="since">Since: 1.6</p> | |
| </div> | |
| <hr> | |
| <div class="refsect2"> | |
| <a name="gst-video-scaler-free"></a><h3>gst_video_scaler_free ()</h3> | |
| <pre class="programlisting"><span class="returnvalue">void</span> | |
| gst_video_scaler_free (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScaler" title="GstVideoScaler"><span class="type">GstVideoScaler</span></a> *scale</code></em>);</pre> | |
| <p>Free a previously allocated <a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScaler" title="GstVideoScaler"><span class="type">GstVideoScaler</span></a> <em class="parameter"><code>scale</code></em> | |
| .</p> | |
| <div class="refsect3"> | |
| <a name="gst-video-scaler-free.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>scale</p></td> | |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScaler" title="GstVideoScaler"><span class="type">GstVideoScaler</span></a></p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr></tbody> | |
| </table></div> | |
| </div> | |
| </div> | |
| <hr> | |
| <div class="refsect2"> | |
| <a name="gst-video-scaler-get-coeff"></a><h3>gst_video_scaler_get_coeff ()</h3> | |
| <pre class="programlisting">const <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a> * | |
| gst_video_scaler_get_coeff (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScaler" title="GstVideoScaler"><span class="type">GstVideoScaler</span></a> *scale</code></em>, | |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="type">guint</span></a> out_offset</code></em>, | |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="type">guint</span></a> *in_offset</code></em>, | |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="type">guint</span></a> *n_taps</code></em>);</pre> | |
| <p>For a given pixel at <em class="parameter"><code>out_offset</code></em> | |
| , get the first required input pixel at | |
| <em class="parameter"><code>in_offset</code></em> | |
| and the <em class="parameter"><code>n_taps</code></em> | |
| filter coefficients.</p> | |
| <p>Note that for interlaced content, <em class="parameter"><code>in_offset</code></em> | |
| needs to be incremented with | |
| 2 to get the next input line.</p> | |
| <div class="refsect3"> | |
| <a name="gst-video-scaler-get-coeff.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>scale</p></td> | |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScaler" title="GstVideoScaler"><span class="type">GstVideoScaler</span></a></p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>out_offset</p></td> | |
| <td class="parameter_description"><p>an output offset</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>in_offset</p></td> | |
| <td class="parameter_description"><p>result input offset</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>n_taps</p></td> | |
| <td class="parameter_description"><p>result n_taps</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| </tbody> | |
| </table></div> | |
| </div> | |
| <div class="refsect3"> | |
| <a name="gst-video-scaler-get-coeff.returns"></a><h4>Returns</h4> | |
| <p> an array of <em class="parameter"><code>n_tap</code></em> | |
| gdouble values with filter coefficients.</p> | |
| </div> | |
| </div> | |
| <hr> | |
| <div class="refsect2"> | |
| <a name="gst-video-scaler-horizontal"></a><h3>gst_video_scaler_horizontal ()</h3> | |
| <pre class="programlisting"><span class="returnvalue">void</span> | |
| gst_video_scaler_horizontal (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScaler" title="GstVideoScaler"><span class="type">GstVideoScaler</span></a> *scale</code></em>, | |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideo.html#GstVideoFormat" title="enum GstVideoFormat"><span class="type">GstVideoFormat</span></a> format</code></em>, | |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> src</code></em>, | |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> dest</code></em>, | |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="type">guint</span></a> dest_offset</code></em>, | |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="type">guint</span></a> width</code></em>);</pre> | |
| <p>Horizontally scale the pixels in <em class="parameter"><code>src</code></em> | |
| to <em class="parameter"><code>dest</code></em> | |
| , starting from <em class="parameter"><code>dest_offset</code></em> | |
| for <em class="parameter"><code>width</code></em> | |
| samples.</p> | |
| <div class="refsect3"> | |
| <a name="gst-video-scaler-horizontal.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>scale</p></td> | |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScaler" title="GstVideoScaler"><span class="type">GstVideoScaler</span></a></p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>format</p></td> | |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideo.html#GstVideoFormat" title="enum GstVideoFormat"><span class="type">GstVideoFormat</span></a> for <em class="parameter"><code>src</code></em> | |
| and <em class="parameter"><code>dest</code></em> | |
| </p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>src</p></td> | |
| <td class="parameter_description"><p>source pixels</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>dest</p></td> | |
| <td class="parameter_description"><p>destination pixels</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>dest_offset</p></td> | |
| <td class="parameter_description"><p>the horizontal destination offset</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>width</p></td> | |
| <td class="parameter_description"><p>the number of pixels to scale</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| </tbody> | |
| </table></div> | |
| </div> | |
| </div> | |
| <hr> | |
| <div class="refsect2"> | |
| <a name="gst-video-scaler-new"></a><h3>gst_video_scaler_new ()</h3> | |
| <pre class="programlisting"><a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScaler" title="GstVideoScaler"><span class="returnvalue">GstVideoScaler</span></a> * | |
| gst_video_scaler_new (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstVideoResampler.html#GstVideoResamplerMethod" title="enum GstVideoResamplerMethod"><span class="type">GstVideoResamplerMethod</span></a> method</code></em>, | |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScalerFlags" title="enum GstVideoScalerFlags"><span class="type">GstVideoScalerFlags</span></a> flags</code></em>, | |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="type">guint</span></a> n_taps</code></em>, | |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="type">guint</span></a> in_size</code></em>, | |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="type">guint</span></a> out_size</code></em>, | |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-1.0GstStructure.html#GstStructure-struct"><span class="type">GstStructure</span></a> *options</code></em>);</pre> | |
| <p>Make a new <em class="parameter"><code>method</code></em> | |
| video scaler. <em class="parameter"><code>in_size</code></em> | |
| source lines/pixels will | |
| be scaled to <em class="parameter"><code>out_size</code></em> | |
| destination lines/pixels.</p> | |
| <p><em class="parameter"><code>n_taps</code></em> | |
| specifies the amount of pixels to use from the source for one output | |
| pixel. If n_taps is 0, this function chooses a good value automatically based | |
| on the <em class="parameter"><code>method</code></em> | |
| and <em class="parameter"><code>in_size</code></em> | |
| /<em class="parameter"><code>out_size</code></em> | |
| .</p> | |
| <p><span class="annotation">[<acronym title="Exposed in C code, not necessarily available in other languages."><span class="acronym">skip</span></acronym>]</span></p> | |
| <div class="refsect3"> | |
| <a name="gst-video-scaler-new.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>method</p></td> | |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-GstVideoResampler.html#GstVideoResamplerMethod" title="enum GstVideoResamplerMethod"><span class="type">GstVideoResamplerMethod</span></a></p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>flags</p></td> | |
| <td class="parameter_description"><p><a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScalerFlags" title="enum GstVideoScalerFlags"><span class="type">GstVideoScalerFlags</span></a></p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>n_taps</p></td> | |
| <td class="parameter_description"><p>number of taps to use</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>in_size</p></td> | |
| <td class="parameter_description"><p>number of source elements</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>out_size</p></td> | |
| <td class="parameter_description"><p>number of destination elements</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>options</p></td> | |
| <td class="parameter_description"><p> extra options. </p></td> | |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td> | |
| </tr> | |
| </tbody> | |
| </table></div> | |
| </div> | |
| <div class="refsect3"> | |
| <a name="gst-video-scaler-new.returns"></a><h4>Returns</h4> | |
| <p> a <span class="type">GstVideoResample</span></p> | |
| </div> | |
| </div> | |
| <hr> | |
| <div class="refsect2"> | |
| <a name="gst-video-scaler-vertical"></a><h3>gst_video_scaler_vertical ()</h3> | |
| <pre class="programlisting"><span class="returnvalue">void</span> | |
| gst_video_scaler_vertical (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScaler" title="GstVideoScaler"><span class="type">GstVideoScaler</span></a> *scale</code></em>, | |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideo.html#GstVideoFormat" title="enum GstVideoFormat"><span class="type">GstVideoFormat</span></a> format</code></em>, | |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> src_lines[]</code></em>, | |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> dest</code></em>, | |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="type">guint</span></a> dest_offset</code></em>, | |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="type">guint</span></a> width</code></em>);</pre> | |
| <p>Vertically combine <em class="parameter"><code>width</code></em> | |
| pixels in the lines in <em class="parameter"><code>src_lines</code></em> | |
| to <em class="parameter"><code>dest</code></em> | |
| . | |
| <em class="parameter"><code>dest</code></em> | |
| is the location of the target line at <em class="parameter"><code>dest_offset</code></em> | |
| and | |
| <em class="parameter"><code>srcs</code></em> | |
| are the input lines for <em class="parameter"><code>dest_offset</code></em> | |
| , as obtained with | |
| <code class="function">gst_video_scaler_get_info()</code>.</p> | |
| <div class="refsect3"> | |
| <a name="gst-video-scaler-vertical.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>scale</p></td> | |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-GstVideoScaler.html#GstVideoScaler" title="GstVideoScaler"><span class="type">GstVideoScaler</span></a></p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>format</p></td> | |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideo.html#GstVideoFormat" title="enum GstVideoFormat"><span class="type">GstVideoFormat</span></a> for <em class="parameter"><code>srcs</code></em> | |
| and <em class="parameter"><code>dest</code></em> | |
| </p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>src_lines</p></td> | |
| <td class="parameter_description"><p>source pixels lines</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>dest</p></td> | |
| <td class="parameter_description"><p>destination pixels</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>dest_offset</p></td> | |
| <td class="parameter_description"><p>the vertical destination offset</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>width</p></td> | |
| <td class="parameter_description"><p>the number of pixels to scale</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| </tbody> | |
| </table></div> | |
| </div> | |
| </div> | |
| </div> | |
| <div class="refsect1"> | |
| <a name="gst-plugins-base-libs-GstVideoScaler.other_details"></a><h2>Types and Values</h2> | |
| <div class="refsect2"> | |
| <a name="GstVideoScaler"></a><h3>GstVideoScaler</h3> | |
| <pre class="programlisting">typedef struct _GstVideoScaler GstVideoScaler;</pre> | |
| </div> | |
| <hr> | |
| <div class="refsect2"> | |
| <a name="GstVideoScalerFlags"></a><h3>enum GstVideoScalerFlags</h3> | |
| <p>Different scale flags.</p> | |
| <div class="refsect3"> | |
| <a name="GstVideoScalerFlags.members"></a><h4>Members</h4> | |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> | |
| <colgroup> | |
| <col width="300px" class="enum_members_name"> | |
| <col class="enum_members_description"> | |
| <col width="200px" class="enum_members_annotations"> | |
| </colgroup> | |
| <tbody> | |
| <tr> | |
| <td class="enum_member_name"><p><a name="GST-VIDEO-SCALER-FLAG-NONE:CAPS"></a>GST_VIDEO_SCALER_FLAG_NONE</p></td> | |
| <td class="enum_member_description"> | |
| <p>no flags</p> | |
| </td> | |
| <td class="enum_member_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="enum_member_name"><p><a name="GST-VIDEO-SCALER-FLAG-INTERLACED:CAPS"></a>GST_VIDEO_SCALER_FLAG_INTERLACED</p></td> | |
| <td class="enum_member_description"> | |
| <p>Set up a scaler for interlaced content</p> | |
| </td> | |
| <td class="enum_member_annotations"> </td> | |
| </tr> | |
| </tbody> | |
| </table></div> | |
| </div> | |
| </div> | |
| </div> | |
| </div> | |
| <div class="footer"> | |
| <hr>Generated by GTK-Doc V1.25</div> | |
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