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| <a href="#gst-plugins-base-libs-gstvideooverlaycomposition.description" class="shortcut">Description</a></span> |
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| <a name="gst-plugins-base-libs-gstvideooverlaycomposition"></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-gstvideooverlaycomposition.top_of_page"></a>gstvideooverlaycomposition</span></h2> |
| <p>gstvideooverlaycomposition — Video Buffer Overlay Compositions (Subtitles, Logos)</p> |
| </td> |
| <td class="gallery_image" valign="top" align="right"></td> |
| </tr></table></div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstvideooverlaycomposition.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"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-new" title="gst_video_overlay_composition_new ()">gst_video_overlay_composition_new</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-ref" title="gst_video_overlay_composition_ref ()">gst_video_overlay_composition_ref</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-gstvideooverlaycomposition.html#gst-video-overlay-composition-unref" title="gst_video_overlay_composition_unref ()">gst_video_overlay_composition_unref</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-gstvideooverlaycomposition.html#gst-video-overlay-composition-add-rectangle" title="gst_video_overlay_composition_add_rectangle ()">gst_video_overlay_composition_add_rectangle</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-n-rectangles" title="gst_video_overlay_composition_n_rectangles ()">gst_video_overlay_composition_n_rectangles</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-get-rectangle" title="gst_video_overlay_composition_get_rectangle ()">gst_video_overlay_composition_get_rectangle</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-get-seqnum" title="gst_video_overlay_composition_get_seqnum ()">gst_video_overlay_composition_get_seqnum</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-copy" title="gst_video_overlay_composition_copy ()">gst_video_overlay_composition_copy</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-make-writable" title="gst_video_overlay_composition_make_writable ()">gst_video_overlay_composition_make_writable</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-blend" title="gst_video_overlay_composition_blend ()">gst_video_overlay_composition_blend</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type">const <a href="/usr/share/gtk-doc/html/gstreamer-1.0gstreamer-GstMeta.html#GstMetaInfo"><span class="returnvalue">GstMetaInfo</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-meta-get-info" title="gst_video_overlay_composition_meta_get_info ()">gst_video_overlay_composition_meta_get_info</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayCompositionMeta" title="struct GstVideoOverlayCompositionMeta"><span class="returnvalue">GstVideoOverlayCompositionMeta</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-buffer-add-video-overlay-composition-meta" title="gst_buffer_add_video_overlay_composition_meta ()">gst_buffer_add_video_overlay_composition_meta</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="define_keyword">#define</td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-buffer-get-video-overlay-composition-meta" title="gst_buffer_get_video_overlay_composition_meta()">gst_buffer_get_video_overlay_composition_meta</a><span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="define_keyword">#define</td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-buffer-remove-video-overlay-composition-meta" title="gst_buffer_remove_video_overlay_composition_meta()">gst_buffer_remove_video_overlay_composition_meta</a><span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-new-raw" title="gst_video_overlay_rectangle_new_raw ()">gst_video_overlay_rectangle_new_raw</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-ref" title="gst_video_overlay_rectangle_ref ()">gst_video_overlay_rectangle_ref</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-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-unref" title="gst_video_overlay_rectangle_unref ()">gst_video_overlay_rectangle_unref</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#GstBuffer-struct"><span class="returnvalue">GstBuffer</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-pixels-raw" title="gst_video_overlay_rectangle_get_pixels_raw ()">gst_video_overlay_rectangle_get_pixels_raw</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#GstBuffer-struct"><span class="returnvalue">GstBuffer</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-pixels-argb" title="gst_video_overlay_rectangle_get_pixels_argb ()">gst_video_overlay_rectangle_get_pixels_argb</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#GstBuffer-struct"><span class="returnvalue">GstBuffer</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-pixels-ayuv" title="gst_video_overlay_rectangle_get_pixels_ayuv ()">gst_video_overlay_rectangle_get_pixels_ayuv</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#GstBuffer-struct"><span class="returnvalue">GstBuffer</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-pixels-unscaled-raw" title="gst_video_overlay_rectangle_get_pixels_unscaled_raw ()">gst_video_overlay_rectangle_get_pixels_unscaled_raw</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#GstBuffer-struct"><span class="returnvalue">GstBuffer</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-pixels-unscaled-argb" title="gst_video_overlay_rectangle_get_pixels_unscaled_argb ()">gst_video_overlay_rectangle_get_pixels_unscaled_argb</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#GstBuffer-struct"><span class="returnvalue">GstBuffer</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-pixels-unscaled-ayuv" title="gst_video_overlay_rectangle_get_pixels_unscaled_ayuv ()">gst_video_overlay_rectangle_get_pixels_unscaled_ayuv</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-render-rectangle" title="gst_video_overlay_rectangle_get_render_rectangle ()">gst_video_overlay_rectangle_get_render_rectangle</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-seqnum" title="gst_video_overlay_rectangle_get_seqnum ()">gst_video_overlay_rectangle_get_seqnum</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-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-set-render-rectangle" title="gst_video_overlay_rectangle_set_render_rectangle ()">gst_video_overlay_rectangle_set_render_rectangle</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-copy" title="gst_video_overlay_rectangle_copy ()">gst_video_overlay_rectangle_copy</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags"><span class="returnvalue">GstVideoOverlayFormatFlags</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-flags" title="gst_video_overlay_rectangle_get_flags ()">gst_video_overlay_rectangle_get_flags</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gfloat"><span class="returnvalue">gfloat</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-global-alpha" title="gst_video_overlay_rectangle_get_global_alpha ()">gst_video_overlay_rectangle_get_global_alpha</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-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-set-global-alpha" title="gst_video_overlay_rectangle_set_global_alpha ()">gst_video_overlay_rectangle_set_global_alpha</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstvideooverlaycomposition.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-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition">GstVideoOverlayComposition</a></td> |
| </tr> |
| <tr> |
| <td class="define_keyword">#define</td> |
| <td class="function_name"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GST-VIDEO-OVERLAY-COMPOSITION-BLEND-FORMATS:CAPS" title="GST_VIDEO_OVERLAY_COMPOSITION_BLEND_FORMATS">GST_VIDEO_OVERLAY_COMPOSITION_BLEND_FORMATS</a></td> |
| </tr> |
| <tr> |
| <td class="datatype_keyword">struct</td> |
| <td class="function_name"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayCompositionMeta" title="struct GstVideoOverlayCompositionMeta">GstVideoOverlayCompositionMeta</a></td> |
| </tr> |
| <tr> |
| <td class="datatype_keyword">enum</td> |
| <td class="function_name"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags">GstVideoOverlayFormatFlags</a></td> |
| </tr> |
| <tr> |
| <td class="datatype_keyword"> </td> |
| <td class="function_name"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle">GstVideoOverlayRectangle</a></td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstvideooverlaycomposition.includes"></a><h2>Includes</h2> |
| <pre class="synopsis">#include <gst/video/video-overlay-composition.h> |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstvideooverlaycomposition.description"></a><h2>Description</h2> |
| <div class="refsect2"> |
| <a name="id-1.2.15.6.6.2"></a><p> |
| Functions to create and handle overlay compositions on video buffers. |
| </p> |
| <p> |
| An overlay composition describes one or more overlay rectangles to be |
| blended on top of a video buffer. |
| </p> |
| <p> |
| This API serves two main purposes: |
| </p> |
| <div class="itemizedlist"> |
| <span class="type">GstOverlayComposition</span><ul class="itemizedlist" style="list-style-type: disc; "> |
| <li class="listitem"> |
| it can be used to attach overlay information (subtitles or logos) |
| to non-raw video buffers such as GL/VAAPI/VDPAU surfaces. The actual |
| blending of the overlay can then be done by e.g. the video sink that |
| processes these non-raw buffers. |
| </li> |
| <li class="listitem"> |
| it can also be used to blend overlay rectangles on top of raw video |
| buffers, thus consolidating blending functionality for raw video in |
| one place. |
| </li> |
| </ul> |
| </div> |
| <p> |
| </p> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstvideooverlaycomposition.functions_details"></a><h2>Functions</h2> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-composition-new"></a><h3>gst_video_overlay_composition_new ()</h3> |
| <pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> * |
| gst_video_overlay_composition_new (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>);</pre> |
| <p>Creates a new video overlay composition object to hold one or more |
| overlay rectangles.</p> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-composition-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>rectangle</p></td> |
| <td class="parameter_description"><p> a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> to add to the |
| composition. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-composition-new.returns"></a><h4>Returns</h4> |
| <p> a new <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>. Unref with |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-unref" title="gst_video_overlay_composition_unref ()"><code class="function">gst_video_overlay_composition_unref()</code></a> when no longer needed. </p> |
| <p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-composition-ref"></a><h3>gst_video_overlay_composition_ref ()</h3> |
| <pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> * |
| gst_video_overlay_composition_ref (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);</pre> |
| <p>Increases the refcount of the given composition by one.</p> |
| <p>Note that the refcount affects the writeability |
| of <em class="parameter"><code>comp</code></em> |
| , use <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-make-writable" title="gst_video_overlay_composition_make_writable ()"><code class="function">gst_video_overlay_composition_make_writable()</code></a> to ensure |
| a composition and its rectangles can be modified.</p> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-composition-ref.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>comp</p></td> |
| <td class="parameter_description"><p>a a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-composition-ref.returns"></a><h4>Returns</h4> |
| <p> <em class="parameter"><code>comp</code></em> |
| . </p> |
| <p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-composition-unref"></a><h3>gst_video_overlay_composition_unref ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> |
| gst_video_overlay_composition_unref (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);</pre> |
| <p>Decreases the refcount of the composition. If the refcount reaches 0, the |
| composition will be freed.</p> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-composition-unref.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>comp</p></td> |
| <td class="parameter_description"><p> a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-composition-add-rectangle"></a><h3>gst_video_overlay_composition_add_rectangle ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> |
| gst_video_overlay_composition_add_rectangle |
| (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>);</pre> |
| <p>Adds an overlay rectangle to an existing overlay composition object. This |
| must be done right after creating the overlay composition.</p> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-composition-add-rectangle.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>comp</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>rectangle</p></td> |
| <td class="parameter_description"><p> a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> to add to the |
| composition. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-composition-n-rectangles"></a><h3>gst_video_overlay_composition_n_rectangles ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> |
| gst_video_overlay_composition_n_rectangles |
| (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);</pre> |
| <p>Returns the number of <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>s contained in <em class="parameter"><code>comp</code></em> |
| .</p> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-composition-n-rectangles.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>comp</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-composition-n-rectangles.returns"></a><h4>Returns</h4> |
| <p> the number of rectangles</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-composition-get-rectangle"></a><h3>gst_video_overlay_composition_get_rectangle ()</h3> |
| <pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> * |
| gst_video_overlay_composition_get_rectangle |
| (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</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</code></em>);</pre> |
| <p>Returns the <em class="parameter"><code>n</code></em> |
| -th <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> contained in <em class="parameter"><code>comp</code></em> |
| .</p> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-composition-get-rectangle.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>comp</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>n</p></td> |
| <td class="parameter_description"><p>number of the rectangle to get</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-composition-get-rectangle.returns"></a><h4>Returns</h4> |
| <p> the <em class="parameter"><code>n</code></em> |
| -th rectangle, or NULL if <em class="parameter"><code>n</code></em> |
| is out of |
| bounds. Will not return a new reference, the caller will need to |
| obtain her own reference using <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-ref" title="gst_video_overlay_rectangle_ref ()"><code class="function">gst_video_overlay_rectangle_ref()</code></a> |
| if needed. </p> |
| <p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-composition-get-seqnum"></a><h3>gst_video_overlay_composition_get_seqnum ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> |
| gst_video_overlay_composition_get_seqnum |
| (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);</pre> |
| <p>Returns the sequence number of this composition. Sequence numbers are |
| monotonically increasing and unique for overlay compositions and rectangles |
| (meaning there will never be a rectangle with the same sequence number as |
| a composition).</p> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-composition-get-seqnum.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>comp</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-composition-get-seqnum.returns"></a><h4>Returns</h4> |
| <p> the sequence number of <em class="parameter"><code>comp</code></em> |
| </p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-composition-copy"></a><h3>gst_video_overlay_composition_copy ()</h3> |
| <pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> * |
| gst_video_overlay_composition_copy (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);</pre> |
| <p>Makes a copy of <em class="parameter"><code>comp</code></em> |
| and all contained rectangles, so that it is possible |
| to modify the composition and contained rectangles (e.g. add additional |
| rectangles or change the render co-ordinates or render dimension). The |
| actual overlay pixel data buffers contained in the rectangles are not |
| copied.</p> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-composition-copy.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>comp</p></td> |
| <td class="parameter_description"><p> a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> to copy. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-composition-copy.returns"></a><h4>Returns</h4> |
| <p> a new <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> equivalent |
| to <em class="parameter"><code>comp</code></em> |
| . </p> |
| <p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-composition-make-writable"></a><h3>gst_video_overlay_composition_make_writable ()</h3> |
| <pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> * |
| gst_video_overlay_composition_make_writable |
| (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);</pre> |
| <p>Takes ownership of <em class="parameter"><code>comp</code></em> |
| and returns a version of <em class="parameter"><code>comp</code></em> |
| that is writable |
| (i.e. can be modified). Will either return <em class="parameter"><code>comp</code></em> |
| right away, or create a |
| new writable copy of <em class="parameter"><code>comp</code></em> |
| and unref <em class="parameter"><code>comp</code></em> |
| itself. All the contained |
| rectangles will also be copied, but the actual overlay pixel data buffers |
| contained in the rectangles are not copied.</p> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-composition-make-writable.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>comp</p></td> |
| <td class="parameter_description"><p> a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> to copy. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-composition-make-writable.returns"></a><h4>Returns</h4> |
| <p> a writable <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> |
| equivalent to <em class="parameter"><code>comp</code></em> |
| . </p> |
| <p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-composition-blend"></a><h3>gst_video_overlay_composition_blend ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| gst_video_overlay_composition_blend (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideo.html#GstVideoFrame" title="struct GstVideoFrame"><span class="type">GstVideoFrame</span></a> *video_buf</code></em>);</pre> |
| <p>Blends the overlay rectangles in <em class="parameter"><code>comp</code></em> |
| on top of the raw video data |
| contained in <em class="parameter"><code>video_buf</code></em> |
| . The data in <em class="parameter"><code>video_buf</code></em> |
| must be writable and |
| mapped appropriately.</p> |
| <p>Since <em class="parameter"><code>video_buf</code></em> |
| data is read and will be modified, it ought be |
| mapped with flag GST_MAP_READWRITE.</p> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-composition-blend.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>comp</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>video_buf</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideo.html#GstVideoFrame" title="struct GstVideoFrame"><span class="type">GstVideoFrame</span></a> containing raw video data in a |
| supported format. It should be mapped using GST_MAP_READWRITE</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-composition-meta-get-info"></a><h3>gst_video_overlay_composition_meta_get_info ()</h3> |
| <pre class="programlisting">const <a href="/usr/share/gtk-doc/html/gstreamer-1.0gstreamer-GstMeta.html#GstMetaInfo"><span class="returnvalue">GstMetaInfo</span></a> * |
| gst_video_overlay_composition_meta_get_info |
| (<em class="parameter"><code><span class="type">void</span></code></em>);</pre> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-buffer-add-video-overlay-composition-meta"></a><h3>gst_buffer_add_video_overlay_composition_meta ()</h3> |
| <pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayCompositionMeta" title="struct GstVideoOverlayCompositionMeta"><span class="returnvalue">GstVideoOverlayCompositionMeta</span></a> * |
| gst_buffer_add_video_overlay_composition_meta |
| (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#GstBuffer-struct"><span class="type">GstBuffer</span></a> *buf</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);</pre> |
| <p>Sets an overlay composition on a buffer. The buffer will obtain its own |
| reference to the composition, meaning this function does not take ownership |
| of <em class="parameter"><code>comp</code></em> |
| .</p> |
| <div class="refsect3"> |
| <a name="gst-buffer-add-video-overlay-composition-meta.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>buf</p></td> |
| <td class="parameter_description"><p>a <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#GstBuffer-struct"><span class="type">GstBuffer</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>comp</p></td> |
| <td class="parameter_description"><p> a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>. </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-buffer-add-video-overlay-composition-meta.returns"></a><h4>Returns</h4> |
| <p> a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayCompositionMeta" title="struct GstVideoOverlayCompositionMeta"><span class="type">GstVideoOverlayCompositionMeta</span></a>. </p> |
| <p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-buffer-get-video-overlay-composition-meta"></a><h3>gst_buffer_get_video_overlay_composition_meta()</h3> |
| <pre class="programlisting">#define gst_buffer_get_video_overlay_composition_meta(b)</pre> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-buffer-remove-video-overlay-composition-meta"></a><h3>gst_buffer_remove_video_overlay_composition_meta()</h3> |
| <pre class="programlisting">#define gst_buffer_remove_video_overlay_composition_meta(b,m)</pre> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-rectangle-new-raw"></a><h3>gst_video_overlay_rectangle_new_raw ()</h3> |
| <pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> * |
| gst_video_overlay_rectangle_new_raw (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#GstBuffer-struct"><span class="type">GstBuffer</span></a> *pixels</code></em>, |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a> render_x</code></em>, |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a> render_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> render_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> render_height</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags"><span class="type">GstVideoOverlayFormatFlags</span></a> flags</code></em>);</pre> |
| <p>Creates a new video overlay rectangle with ARGB or AYUV pixel data. |
| The layout in case of ARGB of the components in memory is B-G-R-A |
| on little-endian platforms |
| (corresponding to <a class="link" href="gst-plugins-base-libs-gstvideo.html#GST-VIDEO-FORMAT-BGRA:CAPS"><span class="type">GST_VIDEO_FORMAT_BGRA</span></a>) and A-R-G-B on big-endian |
| platforms (corresponding to <a class="link" href="gst-plugins-base-libs-gstvideo.html#GST-VIDEO-FORMAT-ARGB:CAPS"><span class="type">GST_VIDEO_FORMAT_ARGB</span></a>). In other words, |
| pixels are treated as 32-bit words and the lowest 8 bits then contain |
| the blue component value and the highest 8 bits contain the alpha |
| component value. Unless specified in the flags, the RGB values are |
| non-premultiplied. This is the format that is used by most hardware, |
| and also many rendering libraries such as Cairo, for example. |
| The pixel data buffer must have <a class="link" href="gst-plugins-base-libs-gstvideometa.html#GstVideoMeta" title="struct GstVideoMeta"><span class="type">GstVideoMeta</span></a> set.</p> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-new-raw.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>pixels</p></td> |
| <td class="parameter_description"><p> a <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#GstBuffer-struct"><span class="type">GstBuffer</span></a> pointing to the pixel memory. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>render_x</p></td> |
| <td class="parameter_description"><p>the X co-ordinate on the video where the top-left corner of this |
| overlay rectangle should be rendered to</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>render_y</p></td> |
| <td class="parameter_description"><p>the Y co-ordinate on the video where the top-left corner of this |
| overlay rectangle should be rendered to</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>render_width</p></td> |
| <td class="parameter_description"><p>the render width of this rectangle on the video</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>render_height</p></td> |
| <td class="parameter_description"><p>the render height of this rectangle on the video</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>flags</p></td> |
| <td class="parameter_description"><p>flags</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-new-raw.returns"></a><h4>Returns</h4> |
| <p> a new <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>. Unref with |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-unref" title="gst_video_overlay_rectangle_unref ()"><code class="function">gst_video_overlay_rectangle_unref()</code></a> when no longer needed. </p> |
| <p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-rectangle-ref"></a><h3>gst_video_overlay_rectangle_ref ()</h3> |
| <pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> * |
| gst_video_overlay_rectangle_ref (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *comp</code></em>);</pre> |
| <p>Increases the refcount of the given rectangle by one.</p> |
| <p>Note that the refcount affects the writeability |
| of <em class="parameter"><code>comp</code></em> |
| , use <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-copy" title="gst_video_overlay_rectangle_copy ()"><code class="function">gst_video_overlay_rectangle_copy()</code></a> to ensure a rectangle can |
| be modified (there is no <code class="function">gst_video_overlay_rectangle_make_writable()</code> because |
| it is unlikely that someone will hold the single reference to the rectangle |
| and not know that that's the case).</p> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-ref.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>comp</p></td> |
| <td class="parameter_description"><p>a a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-ref.returns"></a><h4>Returns</h4> |
| <p> <em class="parameter"><code>comp</code></em> |
| . </p> |
| <p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-rectangle-unref"></a><h3>gst_video_overlay_rectangle_unref ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> |
| gst_video_overlay_rectangle_unref (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *comp</code></em>);</pre> |
| <p>Decreases the refcount of the rectangle. If the refcount reaches 0, the |
| rectangle will be freed.</p> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-unref.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>comp</p></td> |
| <td class="parameter_description"><p> a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-rectangle-get-pixels-raw"></a><h3>gst_video_overlay_rectangle_get_pixels_raw ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#GstBuffer-struct"><span class="returnvalue">GstBuffer</span></a> * |
| gst_video_overlay_rectangle_get_pixels_raw |
| (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags"><span class="type">GstVideoOverlayFormatFlags</span></a> flags</code></em>);</pre> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-get-pixels-raw.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>rectangle</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>flags</p></td> |
| <td class="parameter_description"><p>flags |
| If a global_alpha value != 1 is set for the rectangle, the caller |
| should set the <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GST-VIDEO-OVERLAY-FORMAT-FLAG-GLOBAL-ALPHA:CAPS"><span class="type">GST_VIDEO_OVERLAY_FORMAT_FLAG_GLOBAL_ALPHA</span></a> flag |
| if he wants to apply global-alpha himself. If the flag is not set |
| global_alpha is applied internally before returning the pixel-data.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-get-pixels-raw.returns"></a><h4>Returns</h4> |
| <p> a <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#GstBuffer-struct"><span class="type">GstBuffer</span></a> holding the pixel data with |
| format as originally provided and specified in video meta with |
| width and height of the render dimensions as per |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-render-rectangle" title="gst_video_overlay_rectangle_get_render_rectangle ()"><code class="function">gst_video_overlay_rectangle_get_render_rectangle()</code></a>. This function does |
| not return a reference, the caller should obtain a reference of her own |
| with <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#gst-buffer-ref"><code class="function">gst_buffer_ref()</code></a> if needed. </p> |
| <p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-rectangle-get-pixels-argb"></a><h3>gst_video_overlay_rectangle_get_pixels_argb ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#GstBuffer-struct"><span class="returnvalue">GstBuffer</span></a> * |
| gst_video_overlay_rectangle_get_pixels_argb |
| (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags"><span class="type">GstVideoOverlayFormatFlags</span></a> flags</code></em>);</pre> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-get-pixels-argb.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>rectangle</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>flags</p></td> |
| <td class="parameter_description"><p>flags |
| If a global_alpha value != 1 is set for the rectangle, the caller |
| should set the <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GST-VIDEO-OVERLAY-FORMAT-FLAG-GLOBAL-ALPHA:CAPS"><span class="type">GST_VIDEO_OVERLAY_FORMAT_FLAG_GLOBAL_ALPHA</span></a> flag |
| if he wants to apply global-alpha himself. If the flag is not set |
| global_alpha is applied internally before returning the pixel-data.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-get-pixels-argb.returns"></a><h4>Returns</h4> |
| <p> a <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#GstBuffer-struct"><span class="type">GstBuffer</span></a> holding the ARGB pixel data with |
| width and height of the render dimensions as per |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-render-rectangle" title="gst_video_overlay_rectangle_get_render_rectangle ()"><code class="function">gst_video_overlay_rectangle_get_render_rectangle()</code></a>. This function does |
| not return a reference, the caller should obtain a reference of her own |
| with <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#gst-buffer-ref"><code class="function">gst_buffer_ref()</code></a> if needed. </p> |
| <p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-rectangle-get-pixels-ayuv"></a><h3>gst_video_overlay_rectangle_get_pixels_ayuv ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#GstBuffer-struct"><span class="returnvalue">GstBuffer</span></a> * |
| gst_video_overlay_rectangle_get_pixels_ayuv |
| (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags"><span class="type">GstVideoOverlayFormatFlags</span></a> flags</code></em>);</pre> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-get-pixels-ayuv.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>rectangle</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>flags</p></td> |
| <td class="parameter_description"><p>flags |
| If a global_alpha value != 1 is set for the rectangle, the caller |
| should set the <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GST-VIDEO-OVERLAY-FORMAT-FLAG-GLOBAL-ALPHA:CAPS"><span class="type">GST_VIDEO_OVERLAY_FORMAT_FLAG_GLOBAL_ALPHA</span></a> flag |
| if he wants to apply global-alpha himself. If the flag is not set |
| global_alpha is applied internally before returning the pixel-data.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-get-pixels-ayuv.returns"></a><h4>Returns</h4> |
| <p> a <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#GstBuffer-struct"><span class="type">GstBuffer</span></a> holding the AYUV pixel data with |
| width and height of the render dimensions as per |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-render-rectangle" title="gst_video_overlay_rectangle_get_render_rectangle ()"><code class="function">gst_video_overlay_rectangle_get_render_rectangle()</code></a>. This function does |
| not return a reference, the caller should obtain a reference of her own |
| with <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#gst-buffer-ref"><code class="function">gst_buffer_ref()</code></a> if needed. </p> |
| <p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-rectangle-get-pixels-unscaled-raw"></a><h3>gst_video_overlay_rectangle_get_pixels_unscaled_raw ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#GstBuffer-struct"><span class="returnvalue">GstBuffer</span></a> * |
| gst_video_overlay_rectangle_get_pixels_unscaled_raw |
| (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags"><span class="type">GstVideoOverlayFormatFlags</span></a> flags</code></em>);</pre> |
| <p>Retrieves the pixel data as it is. This is useful if the caller can |
| do the scaling itself when handling the overlaying. The rectangle will |
| need to be scaled to the render dimensions, which can be retrieved using |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-render-rectangle" title="gst_video_overlay_rectangle_get_render_rectangle ()"><code class="function">gst_video_overlay_rectangle_get_render_rectangle()</code></a>.</p> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-get-pixels-unscaled-raw.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>rectangle</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>flags</p></td> |
| <td class="parameter_description"><p>flags. |
| If a global_alpha value != 1 is set for the rectangle, the caller |
| should set the <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GST-VIDEO-OVERLAY-FORMAT-FLAG-GLOBAL-ALPHA:CAPS"><span class="type">GST_VIDEO_OVERLAY_FORMAT_FLAG_GLOBAL_ALPHA</span></a> flag |
| if he wants to apply global-alpha himself. If the flag is not set |
| global_alpha is applied internally before returning the pixel-data.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-get-pixels-unscaled-raw.returns"></a><h4>Returns</h4> |
| <p> a <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#GstBuffer-struct"><span class="type">GstBuffer</span></a> holding the pixel data with |
| <a class="link" href="gst-plugins-base-libs-gstvideometa.html#GstVideoMeta" title="struct GstVideoMeta"><span class="type">GstVideoMeta</span></a> set. This function does not return a reference, the caller |
| should obtain a reference of her own with <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#gst-buffer-ref"><code class="function">gst_buffer_ref()</code></a> if needed. </p> |
| <p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-rectangle-get-pixels-unscaled-argb"></a><h3>gst_video_overlay_rectangle_get_pixels_unscaled_argb ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#GstBuffer-struct"><span class="returnvalue">GstBuffer</span></a> * |
| gst_video_overlay_rectangle_get_pixels_unscaled_argb |
| (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags"><span class="type">GstVideoOverlayFormatFlags</span></a> flags</code></em>);</pre> |
| <p>Retrieves the pixel data as it is. This is useful if the caller can |
| do the scaling itself when handling the overlaying. The rectangle will |
| need to be scaled to the render dimensions, which can be retrieved using |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-render-rectangle" title="gst_video_overlay_rectangle_get_render_rectangle ()"><code class="function">gst_video_overlay_rectangle_get_render_rectangle()</code></a>.</p> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-get-pixels-unscaled-argb.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>rectangle</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>flags</p></td> |
| <td class="parameter_description"><p>flags. |
| If a global_alpha value != 1 is set for the rectangle, the caller |
| should set the <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GST-VIDEO-OVERLAY-FORMAT-FLAG-GLOBAL-ALPHA:CAPS"><span class="type">GST_VIDEO_OVERLAY_FORMAT_FLAG_GLOBAL_ALPHA</span></a> flag |
| if he wants to apply global-alpha himself. If the flag is not set |
| global_alpha is applied internally before returning the pixel-data.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-get-pixels-unscaled-argb.returns"></a><h4>Returns</h4> |
| <p> a <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#GstBuffer-struct"><span class="type">GstBuffer</span></a> holding the ARGB pixel data with |
| <a class="link" href="gst-plugins-base-libs-gstvideometa.html#GstVideoMeta" title="struct GstVideoMeta"><span class="type">GstVideoMeta</span></a> set. This function does not return a reference, the caller |
| should obtain a reference of her own with <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#gst-buffer-ref"><code class="function">gst_buffer_ref()</code></a> if needed. </p> |
| <p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-rectangle-get-pixels-unscaled-ayuv"></a><h3>gst_video_overlay_rectangle_get_pixels_unscaled_ayuv ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#GstBuffer-struct"><span class="returnvalue">GstBuffer</span></a> * |
| gst_video_overlay_rectangle_get_pixels_unscaled_ayuv |
| (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags"><span class="type">GstVideoOverlayFormatFlags</span></a> flags</code></em>);</pre> |
| <p>Retrieves the pixel data as it is. This is useful if the caller can |
| do the scaling itself when handling the overlaying. The rectangle will |
| need to be scaled to the render dimensions, which can be retrieved using |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-render-rectangle" title="gst_video_overlay_rectangle_get_render_rectangle ()"><code class="function">gst_video_overlay_rectangle_get_render_rectangle()</code></a>.</p> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-get-pixels-unscaled-ayuv.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>rectangle</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>flags</p></td> |
| <td class="parameter_description"><p>flags. |
| If a global_alpha value != 1 is set for the rectangle, the caller |
| should set the <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GST-VIDEO-OVERLAY-FORMAT-FLAG-GLOBAL-ALPHA:CAPS"><span class="type">GST_VIDEO_OVERLAY_FORMAT_FLAG_GLOBAL_ALPHA</span></a> flag |
| if he wants to apply global-alpha himself. If the flag is not set |
| global_alpha is applied internally before returning the pixel-data.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-get-pixels-unscaled-ayuv.returns"></a><h4>Returns</h4> |
| <p> a <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#GstBuffer-struct"><span class="type">GstBuffer</span></a> holding the AYUV pixel data with |
| <a class="link" href="gst-plugins-base-libs-gstvideometa.html#GstVideoMeta" title="struct GstVideoMeta"><span class="type">GstVideoMeta</span></a> set. This function does not return a reference, the caller |
| should obtain a reference of her own with <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstBuffer.html#gst-buffer-ref"><code class="function">gst_buffer_ref()</code></a> if needed. </p> |
| <p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-rectangle-get-render-rectangle"></a><h3>gst_video_overlay_rectangle_get_render_rectangle ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| gst_video_overlay_rectangle_get_render_rectangle |
| (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>, |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a> *render_x</code></em>, |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a> *render_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> *render_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> *render_height</code></em>);</pre> |
| <p>Retrieves the render position and render dimension of the overlay |
| rectangle on the video.</p> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-get-render-rectangle.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>rectangle</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>render_x</p></td> |
| <td class="parameter_description"><p> address where to store the X render offset. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>render_y</p></td> |
| <td class="parameter_description"><p> address where to store the Y render offset. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>render_width</p></td> |
| <td class="parameter_description"><p> address where to store the render width. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>render_height</p></td> |
| <td class="parameter_description"><p> address where to store the render height. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<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-overlay-rectangle-get-render-rectangle.returns"></a><h4>Returns</h4> |
| <p> TRUE if valid render dimensions were retrieved.</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-rectangle-get-seqnum"></a><h3>gst_video_overlay_rectangle_get_seqnum ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> |
| gst_video_overlay_rectangle_get_seqnum |
| (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>);</pre> |
| <p>Returns the sequence number of this rectangle. Sequence numbers are |
| monotonically increasing and unique for overlay compositions and rectangles |
| (meaning there will never be a rectangle with the same sequence number as |
| a composition).</p> |
| <p>Using the sequence number of a rectangle as an indicator for changed |
| pixel-data of a rectangle is dangereous. Some API calls, like e.g. |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-set-global-alpha" title="gst_video_overlay_rectangle_set_global_alpha ()"><code class="function">gst_video_overlay_rectangle_set_global_alpha()</code></a>, automatically update |
| the per rectangle sequence number, which is misleading for renderers/ |
| consumers, that handle global-alpha themselves. For them the |
| pixel-data returned by gst_video_overlay_rectangle_get_pixels_*() |
| wont be different for different global-alpha values. In this case a |
| renderer could also use the GstBuffer pointers as a hint for changed |
| pixel-data.</p> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-get-seqnum.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>rectangle</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-get-seqnum.returns"></a><h4>Returns</h4> |
| <p> the sequence number of <em class="parameter"><code>rectangle</code></em> |
| </p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-rectangle-set-render-rectangle"></a><h3>gst_video_overlay_rectangle_set_render_rectangle ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> |
| gst_video_overlay_rectangle_set_render_rectangle |
| (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>, |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a> render_x</code></em>, |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a> render_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> render_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> render_height</code></em>);</pre> |
| <p>Sets the render position and dimensions of the rectangle on the video. |
| This function is mainly for elements that modify the size of the video |
| in some way (e.g. through scaling or cropping) and need to adjust the |
| details of any overlays to match the operation that changed the size.</p> |
| <p><em class="parameter"><code>rectangle</code></em> |
| must be writable, meaning its refcount must be 1. You can |
| make the rectangles inside a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> writable using |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-make-writable" title="gst_video_overlay_composition_make_writable ()"><code class="function">gst_video_overlay_composition_make_writable()</code></a> or |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-copy" title="gst_video_overlay_composition_copy ()"><code class="function">gst_video_overlay_composition_copy()</code></a>.</p> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-set-render-rectangle.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>rectangle</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>render_x</p></td> |
| <td class="parameter_description"><p>render X position of rectangle on video</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>render_y</p></td> |
| <td class="parameter_description"><p>render Y position of rectangle on video</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>render_width</p></td> |
| <td class="parameter_description"><p>render width of rectangle</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>render_height</p></td> |
| <td class="parameter_description"><p>render height of rectangle</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-rectangle-copy"></a><h3>gst_video_overlay_rectangle_copy ()</h3> |
| <pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> * |
| gst_video_overlay_rectangle_copy (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>);</pre> |
| <p>Makes a copy of <em class="parameter"><code>rectangle</code></em> |
| , so that it is possible to modify it |
| (e.g. to change the render co-ordinates or render dimension). The |
| actual overlay pixel data buffers contained in the rectangle are not |
| copied.</p> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-copy.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>rectangle</p></td> |
| <td class="parameter_description"><p> a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> to copy. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-copy.returns"></a><h4>Returns</h4> |
| <p> a new <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> equivalent |
| to <em class="parameter"><code>rectangle</code></em> |
| . </p> |
| <p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-rectangle-get-flags"></a><h3>gst_video_overlay_rectangle_get_flags ()</h3> |
| <pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags"><span class="returnvalue">GstVideoOverlayFormatFlags</span></a> |
| gst_video_overlay_rectangle_get_flags (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>);</pre> |
| <p>Retrieves the flags associated with a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>. |
| This is useful if the caller can handle both premultiplied alpha and |
| non premultiplied alpha, for example. By knowing whether the rectangle |
| uses premultiplied or not, it can request the pixel data in the format |
| it is stored in, to avoid unnecessary conversion.</p> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-get-flags.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>rectangle</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-get-flags.returns"></a><h4>Returns</h4> |
| <p> the <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags"><span class="type">GstVideoOverlayFormatFlags</span></a> associated with the rectangle.</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-rectangle-get-global-alpha"></a><h3>gst_video_overlay_rectangle_get_global_alpha ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gfloat"><span class="returnvalue">gfloat</span></a> |
| gst_video_overlay_rectangle_get_global_alpha |
| (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>);</pre> |
| <p>Retrieves the global-alpha value associated with a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>.</p> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-get-global-alpha.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>rectangle</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-get-global-alpha.returns"></a><h4>Returns</h4> |
| <p> the global-alpha value associated with the rectangle.</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-video-overlay-rectangle-set-global-alpha"></a><h3>gst_video_overlay_rectangle_set_global_alpha ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> |
| gst_video_overlay_rectangle_set_global_alpha |
| (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>, |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gfloat"><span class="type">gfloat</span></a> global_alpha</code></em>);</pre> |
| <p>Sets the global alpha value associated with a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>. Per- |
| pixel alpha values are multiplied with this value. Valid |
| values: 0 <= global_alpha <= 1; 1 to deactivate.</p> |
| <p><em class="parameter"><code>rectangle</code></em> |
| must be writable, meaning its refcount must be 1. You can |
| make the rectangles inside a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> writable using |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-make-writable" title="gst_video_overlay_composition_make_writable ()"><code class="function">gst_video_overlay_composition_make_writable()</code></a> or |
| <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-copy" title="gst_video_overlay_composition_copy ()"><code class="function">gst_video_overlay_composition_copy()</code></a>.</p> |
| <div class="refsect3"> |
| <a name="gst-video-overlay-rectangle-set-global-alpha.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>rectangle</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>global_alpha</p></td> |
| <td class="parameter_description"><p>Global alpha value (0 to 1.0)</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstvideooverlaycomposition.other_details"></a><h2>Types and Values</h2> |
| <div class="refsect2"> |
| <a name="GstVideoOverlayComposition"></a><h3>GstVideoOverlayComposition</h3> |
| <pre class="programlisting">typedef struct _GstVideoOverlayComposition GstVideoOverlayComposition;</pre> |
| <p>An opaque video overlay composition object. A composition contains |
| multiple overlay rectangles.</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GST-VIDEO-OVERLAY-COMPOSITION-BLEND-FORMATS:CAPS"></a><h3>GST_VIDEO_OVERLAY_COMPOSITION_BLEND_FORMATS</h3> |
| <pre class="programlisting">#define GST_VIDEO_OVERLAY_COMPOSITION_BLEND_FORMATS</pre> |
| <p>Video formats supported by <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-blend" title="gst_video_overlay_composition_blend ()"><code class="function">gst_video_overlay_composition_blend()</code></a>, for |
| use in overlay elements' pad template caps.</p> |
| <p class="since">Since: 1.2</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstVideoOverlayCompositionMeta"></a><h3>struct GstVideoOverlayCompositionMeta</h3> |
| <pre class="programlisting">struct GstVideoOverlayCompositionMeta { |
| GstMeta meta; |
| |
| GstVideoOverlayComposition *overlay; |
| }; |
| </pre> |
| <p>Extra buffer metadata describing image overlay data.</p> |
| <div class="refsect3"> |
| <a name="GstVideoOverlayCompositionMeta.members"></a><h4>Members</h4> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="300px" class="struct_members_name"> |
| <col class="struct_members_description"> |
| <col width="200px" class="struct_members_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="struct_member_name"><p><a href="/usr/share/gtk-doc/html/gstreamer-1.0gstreamer-GstMeta.html#GstMeta"><span class="type">GstMeta</span></a> <em class="structfield"><code><a name="GstVideoOverlayCompositionMeta.meta"></a>meta</code></em>;</p></td> |
| <td class="struct_member_description"><p>parent <a href="/usr/share/gtk-doc/html/gstreamer-1.0gstreamer-GstMeta.html#GstMeta"><span class="type">GstMeta</span></a></p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *<em class="structfield"><code><a name="GstVideoOverlayCompositionMeta.overlay"></a>overlay</code></em>;</p></td> |
| <td class="struct_member_description"><p>the attached <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a></p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstVideoOverlayFormatFlags"></a><h3>enum GstVideoOverlayFormatFlags</h3> |
| <p>Overlay format flags.</p> |
| <div class="refsect3"> |
| <a name="GstVideoOverlayFormatFlags.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-OVERLAY-FORMAT-FLAG-NONE:CAPS"></a>GST_VIDEO_OVERLAY_FORMAT_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-OVERLAY-FORMAT-FLAG-PREMULTIPLIED-ALPHA:CAPS"></a>GST_VIDEO_OVERLAY_FORMAT_FLAG_PREMULTIPLIED_ALPHA</p></td> |
| <td class="enum_member_description"> |
| <p>RGB are premultiplied by A/255.</p> |
| </td> |
| <td class="enum_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="enum_member_name"><p><a name="GST-VIDEO-OVERLAY-FORMAT-FLAG-GLOBAL-ALPHA:CAPS"></a>GST_VIDEO_OVERLAY_FORMAT_FLAG_GLOBAL_ALPHA</p></td> |
| <td class="enum_member_description"> |
| <p>a global-alpha value != 1 is set.</p> |
| </td> |
| <td class="enum_member_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstVideoOverlayRectangle"></a><h3>GstVideoOverlayRectangle</h3> |
| <pre class="programlisting">typedef struct _GstVideoOverlayRectangle GstVideoOverlayRectangle;</pre> |
| <p>An opaque video overlay rectangle object. A rectangle contains a single |
| overlay rectangle which can be added to a composition.</p> |
| </div> |
| </div> |
| </div> |
| <div class="footer"> |
| <hr>Generated by GTK-Doc V1.25</div> |
| </body> |
| </html> |
