~sipe-collab/sipe-collab/gstreamer-plugins-base

<a href="#gst-plugins-base-libs-gstvideooverlaycomposition.description" class="shortcut">Description</a></span><span id="nav_hierarchy"> <span class="dim">|</span>

<a href="#gst-plugins-base-libs-gstvideooverlaycomposition.object-hierarchy" class="shortcut">Object Hierarchy</a></span>

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<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>

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<a name="gst-plugins-base-libs-gstvideooverlaycomposition.synopsis"></a><h2>Synopsis</h2>

#include <gst/video/video-overlay-composition.h>

<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition">GstVideoOverlayComposition</a>;

<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> * <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>

(<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>);

<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> * <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>

(<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>);

<span class="returnvalue">void</span> <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> (<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>);

<span class="returnvalue">void</span> <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>

<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>);

<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> <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>

<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> * <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>

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> n</code></em>);

<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> <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>

<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> * <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>

<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> * <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>

#define <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>

<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <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> (<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>);

struct <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayCompositionMeta" title="struct GstVideoOverlayCompositionMeta">GstVideoOverlayCompositionMeta</a>;

const <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstMeta.html#GstMetaInfo"><span class="returnvalue">GstMetaInfo</span></a> * <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>

(<em class="parameter"><code><span class="type">void</span></code></em>);

<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayCompositionMeta" title="struct GstVideoOverlayCompositionMeta"><span class="returnvalue">GstVideoOverlayCompositionMeta</span></a> * <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>

(<em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><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>);

#define <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>(b)

#define <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>(b,

enum <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags">GstVideoOverlayFormatFlags</a>;

<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle">GstVideoOverlayRectangle</a>;

<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> * <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>

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_x</code></em>,

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_y</code></em>,

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> render_width</code></em>,

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-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>);

<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> * <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="returnvalue">void</span> <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> (<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>);

<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> * <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>

<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> * <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>

<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> * <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>

<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> * <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>

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<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> * <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>

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<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> * <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>

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<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *render_x</code></em>,

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<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *render_y</code></em>,

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<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *render_width</code></em>,

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<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *render_height</code></em>);

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<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> <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>

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<span class="returnvalue">void</span> <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>

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<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_x</code></em>,

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<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_y</code></em>,

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<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> render_width</code></em>,

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<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> render_height</code></em>);

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<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> * <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>

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<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags"><span class="returnvalue">GstVideoOverlayFormatFlags</span></a> <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>

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<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gfloat"><span class="returnvalue">gfloat</span></a> <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>

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<span class="returnvalue">void</span> <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>

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<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gfloat"><span class="type">gfloat</span></a> global_alpha</code></em>);

<a name="gst-plugins-base-libs-gstvideooverlaycomposition.functions"></a><h2>Functions</h2>

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<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>

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<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>

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<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>

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<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>

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<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>

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<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> *

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<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>

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<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>

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<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>

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<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>

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<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>

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<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>

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<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>

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<td class="function_type">const <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstMeta.html#GstMetaInfo"><span class="returnvalue">GstMetaInfo</span></a> *

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<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>

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<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>

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<td class="define_keyword">#define</td>

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<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>

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<td class="define_keyword">#define</td>

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<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>

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<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> *

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<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>

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<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> *

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<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>

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<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> *

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</td>

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<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>

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</td>

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</tr>

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<tr>

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<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> *

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</td>

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<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>

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</td>

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</tr>

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<tr>

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<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> *

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</td>

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<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>

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</td>

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</tr>

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<tr>

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<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> *

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</td>

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<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>

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</td>

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</tr>

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<tr>

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<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> *

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</td>

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<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>

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</td>

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</tr>

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<tr>

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<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> *

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</td>

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<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>

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</td>

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</tr>

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<tr>

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<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>

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</td>

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<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>

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</td>

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</tr>

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<tr>

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<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>

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</td>

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<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>

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</td>

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</tr>

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<tr>

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</td>

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<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>

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</td>

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</tr>

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<tr>

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<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> *

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</td>

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<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>

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</td>

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</tr>

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<tr>

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</td>

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<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>

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</td>

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</tr>

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<tr>

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<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gfloat"><span class="returnvalue">gfloat</span></a>

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</td>

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<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>

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</td>

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</tr>

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<tr>

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</td>

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<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>

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</td>

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</tr>

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</tbody>

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</table></div>

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</div>

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<a name="gst-plugins-base-libs-gstvideooverlaycomposition.other"></a><h2>Types and Values</h2>

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</colgroup>

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<tbody>

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<tr>

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<td class="function_name"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition">GstVideoOverlayComposition</a></td>

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</tr>

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<tr>

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<td class="define_keyword">#define</td>

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<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>

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</tr>

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<tr>

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<td class="datatype_keyword">struct</td>

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<td class="function_name"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayCompositionMeta" title="struct GstVideoOverlayCompositionMeta">GstVideoOverlayCompositionMeta</a></td>

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</tr>

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<tr>

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<td class="function_name"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags">GstVideoOverlayFormatFlags</a></td>

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</tr>

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<tr>

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<td class="function_name"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle">GstVideoOverlayRectangle</a></td>

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</tr>

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</tbody>

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</table></div>

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</div>

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<a name="gst-plugins-base-libs-gstvideooverlaycomposition.object-hierarchy"></a><h2>Object Hierarchy</h2>

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</pre>

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</div>

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<a name="gst-plugins-base-libs-gstvideooverlaycomposition.includes"></a><h2>Includes</h2>

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<pre class="synopsis">#include <gst/video/video-overlay-composition.h>

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</pre>

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</div>

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<a name="gst-plugins-base-libs-gstvideooverlaycomposition.description"></a><h2>Description</h2>

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<p>

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</p>

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138

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Functions to create and handle overlay compositions on video buffers.

139

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</p>

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<p>

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<p>

163

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</p>

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</div>

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<p>

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</p>

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</div>

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<a name="gst-plugins-base-libs-gstvideooverlaycomposition.details"></a><h2>Details</h2>

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<a name="GstVideoOverlayComposition"></a><h3>GstVideoOverlayComposition</h3>

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<pre class="programlisting">typedef struct _GstVideoOverlayComposition GstVideoOverlayComposition;</pre>

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<p>

174

An opaque video overlay composition object. A composition contains

175

multiple overlay rectangles.

176

</p>

177

</div>

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<hr>

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180

<a name="gst-video-overlay-composition-new"></a><h3>gst_video_overlay_composition_new ()</h3>

181

<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

182

183

<p>

184

Creates a new video overlay composition object to hold one or more

185

overlay rectangles.

186

</p>

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188

189

190

<col>

191

</colgroup>

192

<tbody>

193

<tr>

194

<td><p><span class="term"><em class="parameter"><code>rectangle</code></em> :</span></p></td>

195

196

composition. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>

197

</td>

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</tr>

199

<tr>

200

<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>

201

<td>a new <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>. Unref with

202

<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. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>

203

</td>

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</tr>

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</tbody>

206

</table></div>

207

</div>

208

<hr>

209

210

<a name="gst-video-overlay-composition-ref"></a><h3>gst_video_overlay_composition_ref ()</h3>

211

212

213

<p>

214

Increases the refcount of the given composition by one.

215

</p>

216

<p>

217

Note that the refcount affects the writeability

218

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

219

a composition and its rectangles can be modified.

220

</p>

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223

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<col>

225

</colgroup>

226

<tbody>

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<tr>

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229

<td>a a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>.</td>

230

</tr>

231

<tr>

232

<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>

233

<td>

234

<em class="parameter"><code>comp</code></em>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>

235

</td>

236

</tr>

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</tbody>

238

</table></div>

239

</div>

240

<hr>

241

242

<a name="gst-video-overlay-composition-unref"></a><h3>gst_video_overlay_composition_unref ()</h3>

243

<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>

244

<p>

245

Decreases the refcount of the composition. If the refcount reaches 0, the

246

composition will be freed.

247

</p>

248

249

250

251

<col>

252

</colgroup>

253

254

255

<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>

256

</td>

257

</tr></tbody>

258

</table></div>

259

</div>

260

<hr>

261

262

<a name="gst-video-overlay-composition-add-rectangle"></a><h3>gst_video_overlay_composition_add_rectangle ()</h3>

263

<pre class="programlisting"><span class="returnvalue">void</span> gst_video_overlay_composition_add_rectangle

264

265

266

<p>

267

Adds an overlay rectangle to an existing overlay composition object. This

268

must be done right after creating the overlay composition.

269

</p>

270

271

272

273

<col>

274

</colgroup>

275

<tbody>

276

<tr>

277

278

279

</td>

280

</tr>

281

<tr>

282

<td><p><span class="term"><em class="parameter"><code>rectangle</code></em> :</span></p></td>

283

284

composition. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>

285

</td>

286

</tr>

287

</tbody>

288

</table></div>

289

</div>

290

<hr>

291

292

<a name="gst-video-overlay-composition-n-rectangles"></a><h3>gst_video_overlay_composition_n_rectangles ()</h3>

293

<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> gst_video_overlay_composition_n_rectangles

294

295

<p>

296

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>.

297

</p>

298

299

300

301

<col>

302

</colgroup>

303

<tbody>

304

<tr>

305

306

307

</td>

308

</tr>

309

<tr>

310

<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>

311

<td>the number of rectangles</td>

312

</tr>

313

</tbody>

314

</table></div>

315

</div>

316

<hr>

317

318

<a name="gst-video-overlay-composition-get-rectangle"></a><h3>gst_video_overlay_composition_get_rectangle ()</h3>

319

<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

320

321

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> n</code></em>);</pre>

322

<p>

323

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>.

324

</p>

325

326

327

328

<col>

329

</colgroup>

330

<tbody>

331

<tr>

332

333

334

</td>

335

</tr>

336

<tr>

337

338

<td>number of the rectangle to get</td>

339

</tr>

340

<tr>

341

<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>

342

<td>the <em class="parameter"><code>n</code></em>-th rectangle, or NULL if <em class="parameter"><code>n</code></em> is out of

355

<a name="gst-plugins-base-libs-gstvideooverlaycomposition.functions_details"></a><h2>Functions</h2>

356

357

<a name="gst-video-overlay-composition-new"></a><h3>gst_video_overlay_composition_new ()</h3>

358

359

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>

360

<p>Creates a new video overlay composition object to hold one or more

361

overlay rectangles.</p>

362

363

<a name="id-1.2.14.5.8.2.5"></a><h4>Parameters</h4>

364

365

366

367

368

369

</colgroup>

370

371

<td class="parameter_name"><p>rectangle</p></td>

372

<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

373

composition. </p></td>

374

<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>

375

</tr></tbody>

376

</table></div>

377

</div>

378

379

<a name="id-1.2.14.5.8.2.6"></a><h4>Returns</h4>

380

<p> a new <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>. Unref with

381

382

<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>

383

</div>

384

</div>

385

<hr>

386

387

<a name="gst-video-overlay-composition-ref"></a><h3>gst_video_overlay_composition_ref ()</h3>

388

389

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>

390

<p>Increases the refcount of the given composition by one.</p>

391

<p>Note that the refcount affects the writeability

392

of <em class="parameter"><code>comp</code></em>

393

, 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

394

a composition and its rectangles can be modified.</p>

395

396

<a name="id-1.2.14.5.8.3.6"></a><h4>Parameters</h4>

397

398

399

400

401

402

</colgroup>

403

404

405

<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>

406

407

</tr></tbody>

408

</table></div>

409

</div>

410

411

<a name="id-1.2.14.5.8.3.7"></a><h4>Returns</h4>

412

413

. </p>

414

<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>

415

</div>

416

</div>

417

<hr>

418

419

<a name="gst-video-overlay-composition-unref"></a><h3>gst_video_overlay_composition_unref ()</h3>

420

421

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>

422

<p>Decreases the refcount of the composition. If the refcount reaches 0, the

423

composition will be freed.</p>

424

425

<a name="id-1.2.14.5.8.4.5"></a><h4>Parameters</h4>

426

427

428

429

430

431

</colgroup>

432

433

434

<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>

435

<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>

436

</tr></tbody>

437

</table></div>

438

</div>

439

</div>

440

<hr>

441

442

<a name="gst-video-overlay-composition-add-rectangle"></a><h3>gst_video_overlay_composition_add_rectangle ()</h3>

443

444

gst_video_overlay_composition_add_rectangle

445

446

447

<p>Adds an overlay rectangle to an existing overlay composition object. This

448

must be done right after creating the overlay composition.</p>

449

450

<a name="id-1.2.14.5.8.5.5"></a><h4>Parameters</h4>

451

452

453

454

455

456

</colgroup>

457

<tbody>

458

<tr>

459

460

<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>

461

462

</tr>

463

<tr>

464

<td class="parameter_name"><p>rectangle</p></td>

465

466

composition. </p></td>

467

<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>

468

</tr>

469

</tbody>

470

</table></div>

471

</div>

472

</div>

473

<hr>

474

475

<a name="gst-video-overlay-composition-n-rectangles"></a><h3>gst_video_overlay_composition_n_rectangles ()</h3>

476

<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>

477

gst_video_overlay_composition_n_rectangles

478

479

<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>

480

.</p>

481

482

<a name="id-1.2.14.5.8.6.5"></a><h4>Parameters</h4>

483

484

485

486

487

488

</colgroup>

489

490

491

<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>

492

493

</tr></tbody>

494

</table></div>

495

</div>

496

497

<a name="id-1.2.14.5.8.6.6"></a><h4>Returns</h4>

498

<p> the number of rectangles</p>

499

<p></p>

500

</div>

501

</div>

502

<hr>

503

504

<a name="gst-video-overlay-composition-get-rectangle"></a><h3>gst_video_overlay_composition_get_rectangle ()</h3>

505

506

gst_video_overlay_composition_get_rectangle

507

508

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> n</code></em>);</pre>

509

<p>Returns the <em class="parameter"><code>n</code></em>

510

-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>

511

.</p>

512

513

<a name="id-1.2.14.5.8.7.5"></a><h4>Parameters</h4>

514

515

516

517

518

519

</colgroup>

520

<tbody>

521

<tr>

522

523

<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>

524

525

</tr>

526

<tr>

527

528

<td class="parameter_description"><p>number of the rectangle to get</p></td>

529

530

</tr>

531

</tbody>

532

</table></div>

533

</div>

534

535

<a name="id-1.2.14.5.8.7.6"></a><h4>Returns</h4>

536

537

-th rectangle, or NULL if <em class="parameter"><code>n</code></em>

538

is out of

343

539

bounds. Will not return a new reference, the caller will need to

344

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>

345

if needed. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>

346

</td>

347

</tr>

348

</tbody>

349

</table></div>

540

541

if needed. </p>

542

<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>

543

</div>

350

544

</div>

351

545

<hr>

352

546

353

<a name="gst-video-overlay-composition-get-seqnum"></a><h3>gst_video_overlay_composition_get_seqnum ()</h3>

354

<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> gst_video_overlay_composition_get_seqnum

355

356

<p>

357

Returns the sequence number of this composition. Sequence numbers are

547

<a name="gst-video-overlay-composition-get-seqnum"></a><h3>gst_video_overlay_composition_get_seqnum ()</h3>

548

<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>

549

gst_video_overlay_composition_get_seqnum

550

551

<p>Returns the sequence number of this composition. Sequence numbers are

358

552

monotonically increasing and unique for overlay compositions and rectangles

359

553

(meaning there will never be a rectangle with the same sequence number as

360

a composition).

361

</p>

362

554

a composition).</p>

555

556

<a name="id-1.2.14.5.8.8.5"></a><h4>Parameters</h4>

557

363

558

364

365

<col>

559

560

561

366

562

</colgroup>

367

<tbody>

368

<tr>

369

370

371

</td>

372

</tr>

373

<tr>

374

<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>

375

<td>the sequence number of <em class="parameter"><code>comp</code></em>

376

</td>

377

</tr>

378

</tbody>

563

564

565

<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>

566

567

</tr></tbody>

379

568

</table></div>

380

569

</div>

570

571

<a name="id-1.2.14.5.8.8.6"></a><h4>Returns</h4>

572

<p> the sequence number of <em class="parameter"><code>comp</code></em>

573

</p>

574

<p></p>

575

</div>

576

</div>

381

577

<hr>

382

578

383

<a name="gst-video-overlay-composition-copy"></a><h3>gst_video_overlay_composition_copy ()</h3>

384

385

386

<p>

387

Makes a copy of <em class="parameter"><code>comp</code></em> and all contained rectangles, so that it is possible

579

<a name="gst-video-overlay-composition-copy"></a><h3>gst_video_overlay_composition_copy ()</h3>

580

581

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>

582

<p>Makes a copy of <em class="parameter"><code>comp</code></em>

583

and all contained rectangles, so that it is possible

388

584

to modify the composition and contained rectangles (e.g. add additional

389

585

rectangles or change the render co-ordinates or render dimension). The

390

586

actual overlay pixel data buffers contained in the rectangles are not

391

copied.

392

</p>

393

587

copied.</p>

588

589

<a name="id-1.2.14.5.8.9.5"></a><h4>Parameters</h4>

590

394

591

395

396

<col>

592

593

594

397

595

</colgroup>

398

<tbody>

399

<tr>

400

401

<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> to copy. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>

402

</td>

403

</tr>

404

<tr>

405

<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>

406

407

to <em class="parameter"><code>comp</code></em>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>

408

</td>

409

</tr>

410

</tbody>

596

597

598

599

<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>

600

</tr></tbody>

411

601

</table></div>

412

602

</div>

603

604

<a name="id-1.2.14.5.8.9.6"></a><h4>Returns</h4>

605

606

to <em class="parameter"><code>comp</code></em>

607

. </p>

608

<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>

609

</div>

610

</div>

413

611

<hr>

414

612

415

<a name="gst-video-overlay-composition-make-writable"></a><h3>gst_video_overlay_composition_make_writable ()</h3>

416

417

418

<p>

419

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

420

(i.e. can be modified). Will either return <em class="parameter"><code>comp</code></em> right away, or create a

421

new writable copy of <em class="parameter"><code>comp</code></em> and unref <em class="parameter"><code>comp</code></em> itself. All the contained

613

<a name="gst-video-overlay-composition-make-writable"></a><h3>gst_video_overlay_composition_make_writable ()</h3>

614

615

gst_video_overlay_composition_make_writable

616

617

<p>Takes ownership of <em class="parameter"><code>comp</code></em>

618

and returns a version of <em class="parameter"><code>comp</code></em>

619

that is writable

620

(i.e. can be modified). Will either return <em class="parameter"><code>comp</code></em>

621

right away, or create a

622

new writable copy of <em class="parameter"><code>comp</code></em>

623

and unref <em class="parameter"><code>comp</code></em>

624

itself. All the contained

422

625

rectangles will also be copied, but the actual overlay pixel data buffers

423

contained in the rectangles are not copied.

424

</p>

425

426

427

428

<col>

429

</colgroup>

430

<tbody>

431

<tr>

432

433

<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> to copy. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>

434

</td>

435

</tr>

436

<tr>

437

<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>

438

<td>a writable <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>

439

equivalent to <em class="parameter"><code>comp</code></em>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>

440

</td>

441

</tr>

442

</tbody>

443

</table></div>

444

</div>

445

<hr>

446

447

<a name="GST-VIDEO-OVERLAY-COMPOSITION-BLEND-FORMATS:CAPS"></a><h3>GST_VIDEO_OVERLAY_COMPOSITION_BLEND_FORMATS</h3>

448

<pre class="programlisting">#define GST_VIDEO_OVERLAY_COMPOSITION_BLEND_FORMATS</pre>

449

<p>

450

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

451

use in overlay elements' pad template caps.

452

</p>

453

<p class="since">Since 1.2</p>

454

</div>

455

<hr>

456

457

<a name="gst-video-overlay-composition-blend"></a><h3>gst_video_overlay_composition_blend ()</h3>

458

<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-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>,

459

<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>

460

<p>

461

Blends the overlay rectangles in <em class="parameter"><code>comp</code></em> on top of the raw video data

462

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

463

mapped appropriately.

464

</p>

465

466

467

468

<col>

469

</colgroup>

470

<tbody>

471

<tr>

472

473

474

</td>

475

</tr>

476

<tr>

477

<td><p><span class="term"><em class="parameter"><code>video_buf</code></em> :</span></p></td>

478

<td>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</td>

479

</tr>

480

</tbody>

481

</table></div>

482

</div>

483

<hr>

484

485

<a name="GstVideoOverlayCompositionMeta"></a><h3>struct GstVideoOverlayCompositionMeta</h3>

486

<pre class="programlisting">struct GstVideoOverlayCompositionMeta {

487

GstMeta meta;

488

489

GstVideoOverlayComposition *overlay;

490

};

491

</pre>

492

<p>

493

Extra buffer metadata describing image overlay data.

494

</p>

495

496

497

498

<col>

499

</colgroup>

500

<tbody>

501

<tr>

502

<td><p><span class="term"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstMeta.html#GstMeta"><span class="type">GstMeta</span></a> <em class="structfield"><code><a name="GstVideoOverlayCompositionMeta.meta"></a>meta</code></em>;</span></p></td>

503

<td>parent <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstMeta.html#GstMeta"><span class="type">GstMeta</span></a>

504

</td>

505

</tr>

506

<tr>

507

<td><p><span class="term"><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>;</span></p></td>

508

<td>the attached <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>

509

</td>

510

</tr>

511

</tbody>

512

</table></div>

513

</div>

514

<hr>

515

516

<a name="gst-video-overlay-composition-meta-get-info"></a><h3>gst_video_overlay_composition_meta_get_info ()</h3>

517

<pre class="programlisting">const <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstMeta.html#GstMetaInfo"><span class="returnvalue">GstMetaInfo</span></a> * gst_video_overlay_composition_meta_get_info

518

(<em class="parameter"><code><span class="type">void</span></code></em>);</pre>

519

</div>

520

<hr>

521

522

<a name="gst-buffer-add-video-overlay-composition-meta"></a><h3>gst_buffer_add_video_overlay_composition_meta ()</h3>

523

<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

524

525

526

<p>

527

Sets an overlay composition on a buffer. The buffer will obtain its own

626

contained in the rectangles are not copied.</p>

627

628

<a name="id-1.2.14.5.8.10.5"></a><h4>Parameters</h4>

629

630

631

632

633

634

</colgroup>

635

636

637

638

<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>

639

</tr></tbody>

640

</table></div>

641

</div>

642

643

<a name="id-1.2.14.5.8.10.6"></a><h4>Returns</h4>

644

<p> a writable <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>

645

equivalent to <em class="parameter"><code>comp</code></em>

646

. </p>

647

<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>

648

</div>

649

</div>

650

<hr>

651

652

<a name="gst-video-overlay-composition-blend"></a><h3>gst_video_overlay_composition_blend ()</h3>

653

<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>

654

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>,

655

656

<p>Blends the overlay rectangles in <em class="parameter"><code>comp</code></em>

657

on top of the raw video data

658

contained in <em class="parameter"><code>video_buf</code></em>

659

. The data in <em class="parameter"><code>video_buf</code></em>

660

must be writable and

661

mapped appropriately.</p>

662

663

<a name="id-1.2.14.5.8.11.5"></a><h4>Parameters</h4>

664

665

666

667

668

669

</colgroup>

670

<tbody>

671

<tr>

672

673

<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>

674

675

</tr>

676

<tr>

677

<td class="parameter_name"><p>video_buf</p></td>

678

<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</p></td>

679

680

</tr>

681

</tbody>

682

</table></div>

683

</div>

684

</div>

685

<hr>

686

687

<a name="gst-video-overlay-composition-meta-get-info"></a><h3>gst_video_overlay_composition_meta_get_info ()</h3>

688

689

gst_video_overlay_composition_meta_get_info

690

(<em class="parameter"><code><span class="type">void</span></code></em>);</pre>

691

</div>

692

<hr>

693

694

<a name="gst-buffer-add-video-overlay-composition-meta"></a><h3>gst_buffer_add_video_overlay_composition_meta ()</h3>

695

696

gst_buffer_add_video_overlay_composition_meta

697

698

699

<p>Sets an overlay composition on a buffer. The buffer will obtain its own

528

700

reference to the composition, meaning this function does not take ownership

529

of <em class="parameter"><code>comp</code></em>.

530

</p>

531

701

of <em class="parameter"><code>comp</code></em>

702

.</p>

703

704

<a name="id-1.2.14.5.8.13.5"></a><h4>Parameters</h4>

705

532

706

533

534

<col>

707

708

709

535

710

</colgroup>

536

711

<tbody>

537

712

<tr>

538

539

<td>a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a>

540

</td>

713

714

<td class="parameter_description"><p>a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a></p></td>

715

541

716

</tr>

542

717

<tr>

543

544

<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>

545

</td>

718

719

720

<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>

546

721

</tr>

547

722

</tbody>

548

723

</table></div>

549

724

</div>

725

</div>

550

726

<hr>

551

727

552

728

<a name="gst-buffer-get-video-overlay-composition-meta"></a><h3>gst_buffer_get_video_overlay_composition_meta()</h3>

559

735

</div>

560

736

<hr>

561

737

562

<a name="GstVideoOverlayFormatFlags"></a><h3>enum GstVideoOverlayFormatFlags</h3>

563

<pre class="programlisting">typedef enum {

564

GST_VIDEO_OVERLAY_FORMAT_FLAG_NONE = 0,

565

GST_VIDEO_OVERLAY_FORMAT_FLAG_PREMULTIPLIED_ALPHA = 1,

566

GST_VIDEO_OVERLAY_FORMAT_FLAG_GLOBAL_ALPHA = 2

567

} GstVideoOverlayFormatFlags;

568

</pre>

569

<p>

570

Overlay format flags.

571

</p>

572

573

574

575

<col>

576

</colgroup>

577

<tbody>

578

<tr>

579

<td><p><a name="GST-VIDEO-OVERLAY-FORMAT-FLAG-NONE:CAPS"></a><span class="term"><code class="literal">GST_VIDEO_OVERLAY_FORMAT_FLAG_NONE</code></span></p></td>

580

<td>no flags

581

</td>

582

</tr>

583

<tr>

584

<td><p><a name="GST-VIDEO-OVERLAY-FORMAT-FLAG-PREMULTIPLIED-ALPHA:CAPS"></a><span class="term"><code class="literal">GST_VIDEO_OVERLAY_FORMAT_FLAG_PREMULTIPLIED_ALPHA</code></span></p></td>

585

<td>RGB are premultiplied by A/255.

586

</td>

587

</tr>

588

<tr>

589

<td><p><a name="GST-VIDEO-OVERLAY-FORMAT-FLAG-GLOBAL-ALPHA:CAPS"></a><span class="term"><code class="literal">GST_VIDEO_OVERLAY_FORMAT_FLAG_GLOBAL_ALPHA</code></span></p></td>

590

<td>a global-alpha value != 1 is set.

591

</td>

592

</tr>

593

</tbody>

594

</table></div>

595

</div>

596

<hr>

597

598

<a name="GstVideoOverlayRectangle"></a><h3>GstVideoOverlayRectangle</h3>

599

<pre class="programlisting">typedef struct _GstVideoOverlayRectangle GstVideoOverlayRectangle;</pre>

600

<p>

601

An opaque video overlay rectangle object. A rectangle contains a single

602

overlay rectangle which can be added to a composition.

603

</p>

604

</div>

605

<hr>

606

607

<a name="gst-video-overlay-rectangle-new-raw"></a><h3>gst_video_overlay_rectangle_new_raw ()</h3>

608

609

610

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_x</code></em>,

611

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_y</code></em>,

612

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> render_width</code></em>,

613

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> render_height</code></em>,

614

615

<p>

616

Creates a new video overlay rectangle with ARGB or AYUV pixel data.

738

<a name="gst-video-overlay-rectangle-new-raw"></a><h3>gst_video_overlay_rectangle_new_raw ()</h3>

739

740

gst_video_overlay_rectangle_new_raw (<em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *pixels</code></em>,

741

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_x</code></em>,

742

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_y</code></em>,

743

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> render_width</code></em>,

744

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> render_height</code></em>,

745

746

<p>Creates a new video overlay rectangle with ARGB or AYUV pixel data.

617

747

The layout in case of ARGB of the components in memory is B-G-R-A

618

748

on little-endian platforms

619

749

(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

623

753

component value. Unless specified in the flags, the RGB values are

624

754

non-premultiplied. This is the format that is used by most hardware,

625

755

and also many rendering libraries such as Cairo, for example.

626

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.

627

</p>

628

756

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>

757

758

<a name="id-1.2.14.5.8.16.5"></a><h4>Parameters</h4>

759

629

760

630

631

<col>

761

762

763

632

764

</colgroup>

633

765

<tbody>

634

766

<tr>

635

<td><p><span class="term"><em class="parameter"><code>pixels</code></em> :</span></p></td>

636

<td>a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> pointing to the pixel memory. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>

637

</td>

638

</tr>

639

<tr>

640

<td><p><span class="term"><em class="parameter"><code>render_x</code></em> :</span></p></td>

641

<td>the X co-ordinate on the video where the top-left corner of this

642

overlay rectangle should be rendered to</td>

643

</tr>

644

<tr>

645

<td><p><span class="term"><em class="parameter"><code>render_y</code></em> :</span></p></td>

646

<td>the Y co-ordinate on the video where the top-left corner of this

647

overlay rectangle should be rendered to</td>

648

</tr>

649

<tr>

650

<td><p><span class="term"><em class="parameter"><code>render_width</code></em> :</span></p></td>

651

<td>the render width of this rectangle on the video</td>

652

</tr>

653

<tr>

654

<td><p><span class="term"><em class="parameter"><code>render_height</code></em> :</span></p></td>

655

<td>the render height of this rectangle on the video</td>

656

</tr>

657

<tr>

658

<td><p><span class="term"><em class="parameter"><code>flags</code></em> :</span></p></td>

659

<td>flags</td>

660

</tr>

661

<tr>

662

<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>

663

<td>a new <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>. Unref with

664

<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. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>

665

</td>

767

<td class="parameter_name"><p>pixels</p></td>

768

<td class="parameter_description"><p> a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> pointing to the pixel memory. </p></td>

769

<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>

770

</tr>

771

<tr>

772

<td class="parameter_name"><p>render_x</p></td>

773

<td class="parameter_description"><p>the X co-ordinate on the video where the top-left corner of this

774

overlay rectangle should be rendered to</p></td>

775

776

</tr>

777

<tr>

778

<td class="parameter_name"><p>render_y</p></td>

779

<td class="parameter_description"><p>the Y co-ordinate on the video where the top-left corner of this

780

overlay rectangle should be rendered to</p></td>

781

782

</tr>

783

<tr>

784

<td class="parameter_name"><p>render_width</p></td>

785

<td class="parameter_description"><p>the render width of this rectangle on the video</p></td>

786

787

</tr>

788

<tr>

789

<td class="parameter_name"><p>render_height</p></td>

790

<td class="parameter_description"><p>the render height of this rectangle on the video</p></td>

791

792

</tr>

793

<tr>

794

<td class="parameter_name"><p>flags</p></td>

795

<td class="parameter_description"><p>flags</p></td>

796

666

797

</tr>

667

798

</tbody>

668

799

</table></div>

669

800

</div>

801

802

<a name="id-1.2.14.5.8.16.6"></a><h4>Returns</h4>

803

<p> a new <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>. Unref with

804

805

<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>

806

</div>

807

</div>

670

808

<hr>

671

809

672

<a name="gst-video-overlay-rectangle-ref"></a><h3>gst_video_overlay_rectangle_ref ()</h3>

673

674

675

<p>

676

Increases the refcount of the given rectangle by one.

677

</p>

678

<p>

679

Note that the refcount affects the writeability

680

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

810

<a name="gst-video-overlay-rectangle-ref"></a><h3>gst_video_overlay_rectangle_ref ()</h3>

811

812

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>

813

<p>Increases the refcount of the given rectangle by one.</p>

814

<p>Note that the refcount affects the writeability

815

of <em class="parameter"><code>comp</code></em>

816

, 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

681

817

be modified (there is no <code class="function">gst_video_overlay_rectangle_make_writable()</code> because

682

818

it is unlikely that someone will hold the single reference to the rectangle

683

and not know that that's the case).

684

</p>

685

686

687

688

<col>

689

</colgroup>

690

<tbody>

691

<tr>

692

693

<td>a a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>.</td>

694

</tr>

695

<tr>

696

<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>

697

<td>

698

<em class="parameter"><code>comp</code></em>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>

699

</td>

700

</tr>

701

</tbody>

702

</table></div>

703

</div>

704

<hr>

705

706

<a name="gst-video-overlay-rectangle-unref"></a><h3>gst_video_overlay_rectangle_unref ()</h3>

707

<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>

708

<p>

709

Decreases the refcount of the rectangle. If the refcount reaches 0, the

710

rectangle will be freed.

711

</p>

712

713

714

715

<col>

716

</colgroup>

717

718

719

<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>

720

</td>

721

</tr></tbody>

722

</table></div>

723

</div>

724

<hr>

725

726

<a name="gst-video-overlay-rectangle-get-pixels-raw"></a><h3>gst_video_overlay_rectangle_get_pixels_raw ()</h3>

727

<pre class="programlisting"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> * gst_video_overlay_rectangle_get_pixels_raw

728

729

730

731

732

733

<col>

734

</colgroup>

735

<tbody>

736

<tr>

737

<td><p><span class="term"><em class="parameter"><code>rectangle</code></em> :</span></p></td>

738

<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>

739

</td>

740

</tr>

741

<tr>

742

<td><p><span class="term"><em class="parameter"><code>flags</code></em> :</span></p></td>

743

<td>flags

819

and not know that that's the case).</p>

820

821

<a name="id-1.2.14.5.8.17.6"></a><h4>Parameters</h4>

822

823

824

825

826

827

</colgroup>

828

829

830

<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>

831

832

</tr></tbody>

833

</table></div>

834

</div>

835

836

<a name="id-1.2.14.5.8.17.7"></a><h4>Returns</h4>

837

838

. </p>

839

<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>

840

</div>

841

</div>

842

<hr>

843

844

<a name="gst-video-overlay-rectangle-unref"></a><h3>gst_video_overlay_rectangle_unref ()</h3>

845

846

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>

847

<p>Decreases the refcount of the rectangle. If the refcount reaches 0, the

848

rectangle will be freed.</p>

849

850

<a name="id-1.2.14.5.8.18.5"></a><h4>Parameters</h4>

851

852

853

854

855

856

</colgroup>

857

858

859

860

<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>

861

</tr></tbody>

862

</table></div>

863

</div>

864

</div>

865

<hr>

866

867

<a name="gst-video-overlay-rectangle-get-pixels-raw"></a><h3>gst_video_overlay_rectangle_get_pixels_raw ()</h3>

868

<pre class="programlisting"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> *

869

gst_video_overlay_rectangle_get_pixels_raw

870

871

872

873

<a name="id-1.2.14.5.8.19.4"></a><h4>Parameters</h4>

874

875

876

877

878

879

</colgroup>

880

<tbody>

881

<tr>

882

<td class="parameter_name"><p>rectangle</p></td>

883

<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>

884

885

</tr>

886

<tr>

887

<td class="parameter_name"><p>flags</p></td>

888

<td class="parameter_description"><p>flags

744

889

If a global_alpha value != 1 is set for the rectangle, the caller

745

890

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

746

891

if he wants to apply global-alpha himself. If the flag is not set

747

global_alpha is applied internally before returning the pixel-data.</td>

892

global_alpha is applied internally before returning the pixel-data.</p></td>

893

748

894

</tr>

749

<tr>

750

<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>

751

<td>a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> holding the pixel data with

895

</tbody>

896

</table></div>

897

</div>

898

899

<a name="id-1.2.14.5.8.19.5"></a><h4>Returns</h4>

900

<p> a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> holding the pixel data with

752

901

format as originally provided and specified in video meta with

753

902

width and height of the render dimensions as per

754

<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

755

not return a reference, the caller should obtain a reference of her own

756

with <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#gst-buffer-ref"><code class="function">gst_buffer_ref()</code></a> if needed. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>

757

</td>

758

</tr>

759

</tbody>

760

</table></div>

761

</div>

762

<hr>

763

764

<a name="gst-video-overlay-rectangle-get-pixels-argb"></a><h3>gst_video_overlay_rectangle_get_pixels_argb ()</h3>

765

766

767

768

769

770

771

<col>

772

</colgroup>

773

<tbody>

774

<tr>

775

<td><p><span class="term"><em class="parameter"><code>rectangle</code></em> :</span></p></td>

776

<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>

777

</td>

778

</tr>

779

<tr>

780

<td><p><span class="term"><em class="parameter"><code>flags</code></em> :</span></p></td>

781

<td>flags

782

If a global_alpha value != 1 is set for the rectangle, the caller

783

784

if he wants to apply global-alpha himself. If the flag is not set

785

global_alpha is applied internally before returning the pixel-data.</td>

786

</tr>

787

<tr>

788

<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>

789

<td>a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> holding the ARGB pixel data with

790

width and height of the render dimensions as per

791

<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

792

not return a reference, the caller should obtain a reference of her own

793

794

</td>

795

</tr>

796

</tbody>

797

</table></div>

798

</div>

799

<hr>

800

801

<a name="gst-video-overlay-rectangle-get-pixels-ayuv"></a><h3>gst_video_overlay_rectangle_get_pixels_ayuv ()</h3>

802

803

804

805

806

807

808

<col>

809

</colgroup>

810

<tbody>

811

<tr>

812

<td><p><span class="term"><em class="parameter"><code>rectangle</code></em> :</span></p></td>

813

<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>

814

</td>

815

</tr>

816

<tr>

817

<td><p><span class="term"><em class="parameter"><code>flags</code></em> :</span></p></td>

818

<td>flags

819

If a global_alpha value != 1 is set for the rectangle, the caller

820

821

if he wants to apply global-alpha himself. If the flag is not set

822

global_alpha is applied internally before returning the pixel-data.</td>

823

</tr>

824

<tr>

825

<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>

826

<td>a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> holding the AYUV pixel data with

827

width and height of the render dimensions as per

828

<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

829

not return a reference, the caller should obtain a reference of her own

830

831

</td>

832

</tr>

833

</tbody>

834

</table></div>

835

</div>

836

<hr>

837

838

<a name="gst-video-overlay-rectangle-get-pixels-unscaled-raw"></a><h3>gst_video_overlay_rectangle_get_pixels_unscaled_raw ()</h3>

839

840

841

842

<p>

843

Retrieves the pixel data as it is. This is useful if the caller can

844

do the scaling itself when handling the overlaying. The rectangle will

845

need to be scaled to the render dimensions, which can be retrieved using

846

<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>.

847

</p>

848

849

850

851

<col>

852

</colgroup>

853

<tbody>

854

<tr>

855

<td><p><span class="term"><em class="parameter"><code>rectangle</code></em> :</span></p></td>

856

<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>

857

</td>

858

</tr>

859

<tr>

860

<td><p><span class="term"><em class="parameter"><code>flags</code></em> :</span></p></td>

861

<td>flags.

862

If a global_alpha value != 1 is set for the rectangle, the caller

863

864

if he wants to apply global-alpha himself. If the flag is not set

865

global_alpha is applied internally before returning the pixel-data.</td>

866

</tr>

867

<tr>

868

<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>

869

<td>a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> holding the pixel data with

870

<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

871

should obtain a reference of her own with <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#gst-buffer-ref"><code class="function">gst_buffer_ref()</code></a> if needed. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>

872

</td>

873

</tr>

874

</tbody>

875

</table></div>

876

</div>

877

<hr>

878

879

<a name="gst-video-overlay-rectangle-get-pixels-unscaled-argb"></a><h3>gst_video_overlay_rectangle_get_pixels_unscaled_argb ()</h3>

880

881

882

883

<p>

884

Retrieves the pixel data as it is. This is useful if the caller can

885

do the scaling itself when handling the overlaying. The rectangle will

886

need to be scaled to the render dimensions, which can be retrieved using

887

<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>.

888

</p>

889

890

891

892

<col>

893

</colgroup>

894

<tbody>

895

<tr>

896

<td><p><span class="term"><em class="parameter"><code>rectangle</code></em> :</span></p></td>

897

<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>

898

</td>

899

</tr>

900

<tr>

901

<td><p><span class="term"><em class="parameter"><code>flags</code></em> :</span></p></td>

902

<td>flags.

903

If a global_alpha value != 1 is set for the rectangle, the caller

904

905

if he wants to apply global-alpha himself. If the flag is not set

906

global_alpha is applied internally before returning the pixel-data.</td>

907

</tr>

908

<tr>

909

<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>

910

<td>a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> holding the ARGB pixel data with

911

912

913

</td>

914

</tr>

915

</tbody>

916

</table></div>

917

</div>

918

<hr>

919

920

<a name="gst-video-overlay-rectangle-get-pixels-unscaled-ayuv"></a><h3>gst_video_overlay_rectangle_get_pixels_unscaled_ayuv ()</h3>

921

922

923

924

<p>

925

Retrieves the pixel data as it is. This is useful if the caller can

926

do the scaling itself when handling the overlaying. The rectangle will

927

need to be scaled to the render dimensions, which can be retrieved using

928

<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>.

929

</p>

930

931

932

933

<col>

934

</colgroup>

935

<tbody>

936

<tr>

937

<td><p><span class="term"><em class="parameter"><code>rectangle</code></em> :</span></p></td>

938

<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>

939

</td>

940

</tr>

941

<tr>

942

<td><p><span class="term"><em class="parameter"><code>flags</code></em> :</span></p></td>

943

<td>flags.

944

If a global_alpha value != 1 is set for the rectangle, the caller

945

946

if he wants to apply global-alpha himself. If the flag is not set

947

global_alpha is applied internally before returning the pixel-data.</td>

948

</tr>

949

<tr>

950

<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>

951

<td>a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> holding the AYUV pixel data with

952

953

954

</td>

955

</tr>

956

</tbody>

957

</table></div>

958

</div>

959

<hr>

960

961

<a name="gst-video-overlay-rectangle-get-render-rectangle"></a><h3>gst_video_overlay_rectangle_get_render_rectangle ()</h3>

962

963

964

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *render_x</code></em>,

965

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *render_y</code></em>,

966

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *render_width</code></em>,

967

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *render_height</code></em>);</pre>

968

<p>

969

Retrieves the render position and render dimension of the overlay

970

rectangle on the video.

971

</p>

972

973

974

975

<col>

976

</colgroup>

977

<tbody>

978

<tr>

979

<td><p><span class="term"><em class="parameter"><code>rectangle</code></em> :</span></p></td>

980

<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>

981

</td>

982

</tr>

983

<tr>

984

<td><p><span class="term"><em class="parameter"><code>render_x</code></em> :</span></p></td>

985

<td>address where to store the X render offset. <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>

986

</td>

987

</tr>

988

<tr>

989

<td><p><span class="term"><em class="parameter"><code>render_y</code></em> :</span></p></td>

990

<td>address where to store the Y render offset. <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>

991

</td>

992

</tr>

993

<tr>

994

<td><p><span class="term"><em class="parameter"><code>render_width</code></em> :</span></p></td>

995

<td>address where to store the render width. <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>

996

</td>

997

</tr>

998

<tr>

999

<td><p><span class="term"><em class="parameter"><code>render_height</code></em> :</span></p></td>

1000

<td>address where to store the render height. <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>

1001

</td>

1002

</tr>

1003

<tr>

1004

<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>

1005

<td>TRUE if valid render dimensions were retrieved.</td>

1006

</tr>

1007

</tbody>

1008

</table></div>

1009

</div>

1010

<hr>

1011

1012

<a name="gst-video-overlay-rectangle-get-seqnum"></a><h3>gst_video_overlay_rectangle_get_seqnum ()</h3>

1013

<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> gst_video_overlay_rectangle_get_seqnum

1014

1015

<p>

1016

Returns the sequence number of this rectangle. Sequence numbers are

903

<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

904

not return a reference, the caller should obtain a reference of her own

905

with <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#gst-buffer-ref"><code class="function">gst_buffer_ref()</code></a> if needed. </p>

906

<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>

907

</div>

908

</div>

909

<hr>

910

911

<a name="gst-video-overlay-rectangle-get-pixels-argb"></a><h3>gst_video_overlay_rectangle_get_pixels_argb ()</h3>

912

<pre class="programlisting"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> *

913

gst_video_overlay_rectangle_get_pixels_argb

914

915

916

917

<a name="id-1.2.14.5.8.20.4"></a><h4>Parameters</h4>

918

919

920

921

922

923

</colgroup>

924

<tbody>

925

<tr>

926

<td class="parameter_name"><p>rectangle</p></td>

927

<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>

928

929

</tr>

930

<tr>

931

<td class="parameter_name"><p>flags</p></td>

932

<td class="parameter_description"><p>flags

933

If a global_alpha value != 1 is set for the rectangle, the caller

934

935

if he wants to apply global-alpha himself. If the flag is not set

936

global_alpha is applied internally before returning the pixel-data.</p></td>

937

938

</tr>

939

</tbody>

940

</table></div>

941

</div>

942

943

<a name="id-1.2.14.5.8.20.5"></a><h4>Returns</h4>

944

<p> a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> holding the ARGB pixel data with

945

width and height of the render dimensions as per

946

<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

947

not return a reference, the caller should obtain a reference of her own

948

with <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#gst-buffer-ref"><code class="function">gst_buffer_ref()</code></a> if needed. </p>

949

<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>

950

</div>

951

</div>

952

<hr>

953

954

<a name="gst-video-overlay-rectangle-get-pixels-ayuv"></a><h3>gst_video_overlay_rectangle_get_pixels_ayuv ()</h3>

955

<pre class="programlisting"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> *

956

gst_video_overlay_rectangle_get_pixels_ayuv

957

958

959

960

<a name="id-1.2.14.5.8.21.4"></a><h4>Parameters</h4>

961

962

963

964

965

966

</colgroup>

967

<tbody>

968

<tr>

969

<td class="parameter_name"><p>rectangle</p></td>

970

<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>

971

972

</tr>

973

<tr>

974

<td class="parameter_name"><p>flags</p></td>

975

<td class="parameter_description"><p>flags

976

If a global_alpha value != 1 is set for the rectangle, the caller

977

978

if he wants to apply global-alpha himself. If the flag is not set

979

global_alpha is applied internally before returning the pixel-data.</p></td>

980

981

</tr>

982

</tbody>

983

</table></div>

984

</div>

985

986

<a name="id-1.2.14.5.8.21.5"></a><h4>Returns</h4>

987

<p> a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> holding the AYUV pixel data with

988

width and height of the render dimensions as per

989

<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

990

not return a reference, the caller should obtain a reference of her own

991

with <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#gst-buffer-ref"><code class="function">gst_buffer_ref()</code></a> if needed. </p>

992

<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>

993

</div>

994

</div>

995

<hr>

996

997

<a name="gst-video-overlay-rectangle-get-pixels-unscaled-raw"></a><h3>gst_video_overlay_rectangle_get_pixels_unscaled_raw ()</h3>

998

<pre class="programlisting"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> *

999

gst_video_overlay_rectangle_get_pixels_unscaled_raw

1000

1001

1002

<p>Retrieves the pixel data as it is. This is useful if the caller can

1003

do the scaling itself when handling the overlaying. The rectangle will

1004

need to be scaled to the render dimensions, which can be retrieved using

1005

<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>

1006

1007

<a name="id-1.2.14.5.8.22.5"></a><h4>Parameters</h4>

1008

1009

1010

1011

1012

1013

</colgroup>

1014

<tbody>

1015

<tr>

1016

<td class="parameter_name"><p>rectangle</p></td>

1017

<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>

1018

1019

</tr>

1020

<tr>

1021

<td class="parameter_name"><p>flags</p></td>

1022

<td class="parameter_description"><p>flags.

1023

If a global_alpha value != 1 is set for the rectangle, the caller

1024

1025

if he wants to apply global-alpha himself. If the flag is not set

1026

global_alpha is applied internally before returning the pixel-data.</p></td>

1027

1028

</tr>

1029

</tbody>

1030

</table></div>

1031

</div>

1032

1033

<a name="id-1.2.14.5.8.22.6"></a><h4>Returns</h4>

1034

<p> a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> holding the pixel data with

1035

1036

1037

<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>

1038

</div>

1039

</div>

1040

<hr>

1041

1042

<a name="gst-video-overlay-rectangle-get-pixels-unscaled-argb"></a><h3>gst_video_overlay_rectangle_get_pixels_unscaled_argb ()</h3>

1043

<pre class="programlisting"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> *

1044

gst_video_overlay_rectangle_get_pixels_unscaled_argb

1045

1046

1047

<p>Retrieves the pixel data as it is. This is useful if the caller can

1048

do the scaling itself when handling the overlaying. The rectangle will

1049

need to be scaled to the render dimensions, which can be retrieved using

1050

<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>

1051

1052

<a name="id-1.2.14.5.8.23.5"></a><h4>Parameters</h4>

1053

1054

1055

1056

1057

1058

</colgroup>

1059

<tbody>

1060

<tr>

1061

<td class="parameter_name"><p>rectangle</p></td>

1062

<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>

1063

1064

</tr>

1065

<tr>

1066

<td class="parameter_name"><p>flags</p></td>

1067

<td class="parameter_description"><p>flags.

1068

If a global_alpha value != 1 is set for the rectangle, the caller

1069

1070

if he wants to apply global-alpha himself. If the flag is not set

1071

global_alpha is applied internally before returning the pixel-data.</p></td>

1072

1073

</tr>

1074

</tbody>

1075

</table></div>

1076

</div>

1077

1078

<a name="id-1.2.14.5.8.23.6"></a><h4>Returns</h4>

1079

<p> a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> holding the ARGB pixel data with

1080

1081

1082

<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>

1083

</div>

1084

</div>

1085

<hr>

1086

1087

<a name="gst-video-overlay-rectangle-get-pixels-unscaled-ayuv"></a><h3>gst_video_overlay_rectangle_get_pixels_unscaled_ayuv ()</h3>

1088

<pre class="programlisting"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> *

1089

gst_video_overlay_rectangle_get_pixels_unscaled_ayuv

1090

1091

1092

<p>Retrieves the pixel data as it is. This is useful if the caller can

1093

do the scaling itself when handling the overlaying. The rectangle will

1094

need to be scaled to the render dimensions, which can be retrieved using

1095

<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>

1096

1097

<a name="id-1.2.14.5.8.24.5"></a><h4>Parameters</h4>

1098

1099

1100

1101

1102

1103

</colgroup>

1104

<tbody>

1105

<tr>

1106

<td class="parameter_name"><p>rectangle</p></td>

1107

<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>

1108

1109

</tr>

1110

<tr>

1111

<td class="parameter_name"><p>flags</p></td>

1112

<td class="parameter_description"><p>flags.

1113

If a global_alpha value != 1 is set for the rectangle, the caller

1114

1115

if he wants to apply global-alpha himself. If the flag is not set

1116

global_alpha is applied internally before returning the pixel-data.</p></td>

1117

1118

</tr>

1119

</tbody>

1120

</table></div>

1121

</div>

1122

1123

<a name="id-1.2.14.5.8.24.6"></a><h4>Returns</h4>

1124

<p> a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> holding the AYUV pixel data with

1125

1126

1127

<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>

1128

</div>

1129

</div>

1130

<hr>

1131

1132

<a name="gst-video-overlay-rectangle-get-render-rectangle"></a><h3>gst_video_overlay_rectangle_get_render_rectangle ()</h3>

1133

<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>

1134

gst_video_overlay_rectangle_get_render_rectangle

1135

1136

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *render_x</code></em>,

1137

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *render_y</code></em>,

1138

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *render_width</code></em>,

1139

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *render_height</code></em>);</pre>

1140

<p>Retrieves the render position and render dimension of the overlay

1141

rectangle on the video.</p>

1142

1143

<a name="id-1.2.14.5.8.25.5"></a><h4>Parameters</h4>

1144

1145

1146

1147

1148

1149

</colgroup>

1150

<tbody>

1151

<tr>

1152

<td class="parameter_name"><p>rectangle</p></td>

1153

<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>

1154

1155

</tr>

1156

<tr>

1157

<td class="parameter_name"><p>render_x</p></td>

1158

<td class="parameter_description"><p> address where to store the X render offset. </p></td>

1159

<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>

1160

</tr>

1161

<tr>

1162

<td class="parameter_name"><p>render_y</p></td>

1163

<td class="parameter_description"><p> address where to store the Y render offset. </p></td>

1164

1165

</tr>

1166

<tr>

1167

<td class="parameter_name"><p>render_width</p></td>

1168

<td class="parameter_description"><p> address where to store the render width. </p></td>

1169

1170

</tr>

1171

<tr>

1172

<td class="parameter_name"><p>render_height</p></td>

1173

<td class="parameter_description"><p> address where to store the render height. </p></td>

1174

1175

</tr>

1176

</tbody>

1177

</table></div>

1178

</div>

1179

1180

<a name="id-1.2.14.5.8.25.6"></a><h4>Returns</h4>

1181

<p> TRUE if valid render dimensions were retrieved.</p>

1182

<p></p>

1183

</div>

1184

</div>

1185

<hr>

1186

1187

<a name="gst-video-overlay-rectangle-get-seqnum"></a><h3>gst_video_overlay_rectangle_get_seqnum ()</h3>

1188

<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>

1189

gst_video_overlay_rectangle_get_seqnum

1190

1191

<p>Returns the sequence number of this rectangle. Sequence numbers are

1017

1192

monotonically increasing and unique for overlay compositions and rectangles

1018

1193

(meaning there will never be a rectangle with the same sequence number as

1019

a composition).

1020

</p>

1021

<p>

1022

Using the sequence number of a rectangle as an indicator for changed

1194

a composition).</p>

1195

<p>Using the sequence number of a rectangle as an indicator for changed

1023

1196

pixel-data of a rectangle is dangereous. Some API calls, like e.g.

1024

<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

1197

<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

1025

1198

the per rectangle sequence number, which is misleading for renderers/

1026

1199

consumers, that handle global-alpha themselves. For them the

1027

1200

pixel-data returned by gst_video_overlay_rectangle_get_pixels_*()

1028

1201

wont be different for different global-alpha values. In this case a

1029

1202

renderer could also use the GstBuffer pointers as a hint for changed

1030

pixel-data.

1031

</p>

1032

1203

pixel-data.</p>

1204

1205

<a name="id-1.2.14.5.8.26.6"></a><h4>Parameters</h4>

1206

1033

1207

1034

1035

<col>

1208

1209

1210

1036

1211

</colgroup>

1037

<tbody>

1038

<tr>

1039

<td><p><span class="term"><em class="parameter"><code>rectangle</code></em> :</span></p></td>

1040

<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>

1041

</td>

1042

</tr>

1043

<tr>

1044

<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>

1045

<td>the sequence number of <em class="parameter"><code>rectangle</code></em>

1046

</td>

1047

</tr>

1048

</tbody>

1212

1213

<td class="parameter_name"><p>rectangle</p></td>

1214

<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>

1215

1216

</tr></tbody>

1049

1217

</table></div>

1050

1218

</div>

1219

1220

<a name="id-1.2.14.5.8.26.7"></a><h4>Returns</h4>

1221

<p> the sequence number of <em class="parameter"><code>rectangle</code></em>

1222

</p>

1223

<p></p>

1224

</div>

1225

</div>

1051

1226

<hr>

1052

1227

1053

<a name="gst-video-overlay-rectangle-set-render-rectangle"></a><h3>gst_video_overlay_rectangle_set_render_rectangle ()</h3>

1054

<pre class="programlisting"><span class="returnvalue">void</span> gst_video_overlay_rectangle_set_render_rectangle

1055

1056

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_x</code></em>,

1057

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_y</code></em>,

1058

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> render_width</code></em>,

1059

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> render_height</code></em>);</pre>

1060

<p>

1061

Sets the render position and dimensions of the rectangle on the video.

1228

<a name="gst-video-overlay-rectangle-set-render-rectangle"></a><h3>gst_video_overlay_rectangle_set_render_rectangle ()</h3>

1229

1230

gst_video_overlay_rectangle_set_render_rectangle

1231

1232

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_x</code></em>,

1233

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_y</code></em>,

1234

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> render_width</code></em>,

1235

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> render_height</code></em>);</pre>

1236

<p>Sets the render position and dimensions of the rectangle on the video.

1062

1237

This function is mainly for elements that modify the size of the video

1063

1238

in some way (e.g. through scaling or cropping) and need to adjust the

1064

details of any overlays to match the operation that changed the size.

1065

</p>

1066

<p>

1067

<em class="parameter"><code>rectangle</code></em> must be writable, meaning its refcount must be 1. You can

1239

details of any overlays to match the operation that changed the size.</p>

1240

<p><em class="parameter"><code>rectangle</code></em>

1241

must be writable, meaning its refcount must be 1. You can

1068

1242

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

1069

<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

1070

<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>.

1071

</p>

1072

1243

<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

1244

<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>

1245

1246

<a name="id-1.2.14.5.8.27.6"></a><h4>Parameters</h4>

1247

1073

1248

1074

1075

<col>

1249

1250

1251

1076

1252

</colgroup>

1077

1253

<tbody>

1078

1254

<tr>

1079

<td><p><span class="term"><em class="parameter"><code>rectangle</code></em> :</span></p></td>

1080

<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>

1081

</td>

1082

</tr>

1083

<tr>

1084

<td><p><span class="term"><em class="parameter"><code>render_x</code></em> :</span></p></td>

1085

<td>render X position of rectangle on video</td>

1086

</tr>

1087

<tr>

1088

<td><p><span class="term"><em class="parameter"><code>render_y</code></em> :</span></p></td>

1089

<td>render Y position of rectangle on video</td>

1090

</tr>

1091

<tr>

1092

<td><p><span class="term"><em class="parameter"><code>render_width</code></em> :</span></p></td>

1093

<td>render width of rectangle</td>

1094

</tr>

1095

<tr>

1096

<td><p><span class="term"><em class="parameter"><code>render_height</code></em> :</span></p></td>

1097

<td>render height of rectangle</td>

1255

<td class="parameter_name"><p>rectangle</p></td>

1256

<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>

1257

1258

</tr>

1259

<tr>

1260

<td class="parameter_name"><p>render_x</p></td>

1261

<td class="parameter_description"><p>render X position of rectangle on video</p></td>

1262

1263

</tr>

1264

<tr>

1265

<td class="parameter_name"><p>render_y</p></td>

1266

<td class="parameter_description"><p>render Y position of rectangle on video</p></td>

1267

1268

</tr>

1269

<tr>

1270

<td class="parameter_name"><p>render_width</p></td>

1271

<td class="parameter_description"><p>render width of rectangle</p></td>

1272

1273

</tr>

1274

<tr>

1275

<td class="parameter_name"><p>render_height</p></td>

1276

<td class="parameter_description"><p>render height of rectangle</p></td>

1277

1098

1278

</tr>

1099

1279

</tbody>

1100

1280

</table></div>

1101

1281

</div>

1282

</div>

1102

1283

<hr>

1103

1284

1104

<a name="gst-video-overlay-rectangle-copy"></a><h3>gst_video_overlay_rectangle_copy ()</h3>

1105

1106

1107

<p>

1108

Makes a copy of <em class="parameter"><code>rectangle</code></em>, so that it is possible to modify it

1285

<a name="gst-video-overlay-rectangle-copy"></a><h3>gst_video_overlay_rectangle_copy ()</h3>

1286

1287

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>

1288

<p>Makes a copy of <em class="parameter"><code>rectangle</code></em>

1289

, so that it is possible to modify it

1109

1290

(e.g. to change the render co-ordinates or render dimension). The

1110

1291

actual overlay pixel data buffers contained in the rectangle are not

1111

copied.

1112

</p>

1113

1292

copied.</p>

1293

1294

<a name="id-1.2.14.5.8.28.5"></a><h4>Parameters</h4>

1295

1114

1296

1115

1116

<col>

1297

1298

1299

1117

1300

</colgroup>

1118

<tbody>

1119

<tr>

1120

<td><p><span class="term"><em class="parameter"><code>rectangle</code></em> :</span></p></td>

1121

<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> to copy. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>

1122

</td>

1123

</tr>

1124

<tr>

1125

<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>

1126

1127

to <em class="parameter"><code>rectangle</code></em>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>

1128

</td>

1129

</tr>

1130

</tbody>

1301

1302

<td class="parameter_name"><p>rectangle</p></td>

1303

1304

<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>

1305

</tr></tbody>

1131

1306

</table></div>

1132

1307

</div>

1308

1309

<a name="id-1.2.14.5.8.28.6"></a><h4>Returns</h4>

1310

1311

to <em class="parameter"><code>rectangle</code></em>

1312

. </p>

1313

<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>

1314

</div>

1315

</div>

1133

1316

<hr>

1134

1317

1135

<a name="gst-video-overlay-rectangle-get-flags"></a><h3>gst_video_overlay_rectangle_get_flags ()</h3>

1136

<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

1137

1138

<p>

1139

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>.

1318

<a name="gst-video-overlay-rectangle-get-flags"></a><h3>gst_video_overlay_rectangle_get_flags ()</h3>

1319

1320

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>

1321

<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>.

1140

1322

This is useful if the caller can handle both premultiplied alpha and

1141

1323

non premultiplied alpha, for example. By knowing whether the rectangle

1142

1324

uses premultiplied or not, it can request the pixel data in the format

1143

it is stored in, to avoid unnecessary conversion.

1144

</p>

1145

1146

1147

1148

<col>

1149

</colgroup>

1150

<tbody>

1151

<tr>

1152

<td><p><span class="term"><em class="parameter"><code>rectangle</code></em> :</span></p></td>

1153

<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>

1154

</td>

1155

</tr>

1156

<tr>

1157

<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>

1158

<td>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.</td>

1159

</tr>

1160

</tbody>

1161

</table></div>

1162

</div>

1163

<hr>

1164

1165

<a name="gst-video-overlay-rectangle-get-global-alpha"></a><h3>gst_video_overlay_rectangle_get_global_alpha ()</h3>

1166

<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gfloat"><span class="returnvalue">gfloat</span></a> gst_video_overlay_rectangle_get_global_alpha

1167

1168

<p>

1169

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>.

1170

</p>

1171

1172

1173

1174

<col>

1175

</colgroup>

1176

<tbody>

1177

<tr>

1178

<td><p><span class="term"><em class="parameter"><code>rectangle</code></em> :</span></p></td>

1179

<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>

1180

</td>

1181

</tr>

1182

<tr>

1183

<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>

1184

<td>the global-alpha value associated with the rectangle.</td>

1185

</tr>

1186

</tbody>

1187

</table></div>

1188

</div>

1189

<hr>

1190

1191

<a name="gst-video-overlay-rectangle-set-global-alpha"></a><h3>gst_video_overlay_rectangle_set_global_alpha ()</h3>

1192

<pre class="programlisting"><span class="returnvalue">void</span> gst_video_overlay_rectangle_set_global_alpha

1193

1194

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gfloat"><span class="type">gfloat</span></a> global_alpha</code></em>);</pre>

1195

<p>

1196

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-

1325

it is stored in, to avoid unnecessary conversion.</p>

1326

1327

<a name="id-1.2.14.5.8.29.5"></a><h4>Parameters</h4>

1328

1329

1330

1331

1332

1333

</colgroup>

1334

1335

<td class="parameter_name"><p>rectangle</p></td>

1336

<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>

1337

1338

</tr></tbody>

1339

</table></div>

1340

</div>

1341

1342

<a name="id-1.2.14.5.8.29.6"></a><h4>Returns</h4>

1343

<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>

1344

<p></p>

1345

</div>

1346

</div>

1347

<hr>

1348

1349

<a name="gst-video-overlay-rectangle-get-global-alpha"></a><h3>gst_video_overlay_rectangle_get_global_alpha ()</h3>

1350

<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gfloat"><span class="returnvalue">gfloat</span></a>

1351

gst_video_overlay_rectangle_get_global_alpha

1352

1353

<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>

1354

1355

<a name="id-1.2.14.5.8.30.5"></a><h4>Parameters</h4>

1356

1357

1358

1359

1360

1361

</colgroup>

1362

1363

<td class="parameter_name"><p>rectangle</p></td>

1364

<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>

1365

1366

</tr></tbody>

1367

</table></div>

1368

</div>

1369

1370

<a name="id-1.2.14.5.8.30.6"></a><h4>Returns</h4>

1371

<p> the global-alpha value associated with the rectangle.</p>

1372

<p></p>

1373

</div>

1374

</div>

1375

<hr>

1376

1377

<a name="gst-video-overlay-rectangle-set-global-alpha"></a><h3>gst_video_overlay_rectangle_set_global_alpha ()</h3>

1378

1379

gst_video_overlay_rectangle_set_global_alpha

1380

1381

<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gfloat"><span class="type">gfloat</span></a> global_alpha</code></em>);</pre>

1382

<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-

1197

1383

pixel alpha values are multiplied with this value. Valid

1198

values: 0 <= global_alpha <= 1; 1 to deactivate.

1199

</p>

1200

<p>

1201

# <em class="parameter"><code>rectangle</code></em> must be writable, meaning its refcount must be 1. You can

1384

values: 0 <= global_alpha <= 1; 1 to deactivate.</p>

1385

<p> # <em class="parameter"><code>rectangle</code></em>

1386

must be writable, meaning its refcount must be 1. You can

1202

1387

1203

<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

1204

<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>.

1205

</p>

1206

1388

<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

1389

<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>

1390

1391

<a name="id-1.2.14.5.8.31.6"></a><h4>Parameters</h4>

1392

1207

1393

1208

1209

<col>

1394

1395

1396

1210

1397

</colgroup>

1211

1398

1212

<td><p><span class="term"><em class="parameter"><code>rectangle</code></em> :</span></p></td>

1213

<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>

1214

</td>

1399

<td class="parameter_name"><p>rectangle</p></td>

1400

<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>

1401

1215

1402

</tr></tbody>

1216

1403

</table></div>

1217

1404

</div>

1218

1405

</div>

1219

1406

</div>

1407

1408

<a name="gst-plugins-base-libs-gstvideooverlaycomposition.other_details"></a><h2>Types and Values</h2>

1409

1410

<a name="GstVideoOverlayComposition"></a><h3>GstVideoOverlayComposition</h3>

1411

<pre class="programlisting">typedef struct _GstVideoOverlayComposition GstVideoOverlayComposition;</pre>

1412

<p>An opaque video overlay composition object. A composition contains

1413

multiple overlay rectangles.</p>

1414

</div>

1415

<hr>

1416

1417

<a name="GST-VIDEO-OVERLAY-COMPOSITION-BLEND-FORMATS:CAPS"></a><h3>GST_VIDEO_OVERLAY_COMPOSITION_BLEND_FORMATS</h3>

1418

<pre class="programlisting">#define GST_VIDEO_OVERLAY_COMPOSITION_BLEND_FORMATS</pre>

1419

<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

1420

use in overlay elements' pad template caps.</p>

1421

<p class="since">Since 1.2</p>

1422

</div>

1423

<hr>

1424

1425

<a name="GstVideoOverlayCompositionMeta"></a><h3>struct GstVideoOverlayCompositionMeta</h3>

1426

<pre class="programlisting">struct GstVideoOverlayCompositionMeta {

1427

GstMeta meta;

1428

1429

GstVideoOverlayComposition *overlay;

1430

};

1431

</pre>

1432

<p>Extra buffer metadata describing image overlay data.</p>

1433

1434

<a name="id-1.2.14.5.9.4.5"></a><h4>Members</h4>

1435

1436

1437

1438

1439

1440

</colgroup>

1441

<tbody>

1442

<tr>

1443

<td class="struct_member_name"><p><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstMeta.html#GstMeta"><span class="type">GstMeta</span></a> <em class="structfield"><code><a name="GstVideoOverlayCompositionMeta.meta"></a>meta</code></em>;</p></td>

1444

<td class="struct_member_description"><p>parent <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstMeta.html#GstMeta"><span class="type">GstMeta</span></a></p></td>

1445

1446

</tr>

1447

<tr>

1448

<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>

1449

<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>

1450

1451

</tr>

1452

</tbody>

1453

</table></div>

1454

</div>

1455

</div>

1456

<hr>

1457

1458

<a name="GstVideoOverlayFormatFlags"></a><h3>enum GstVideoOverlayFormatFlags</h3>

1459

<p>Overlay format flags.</p>

1460

1461

<a name="id-1.2.14.5.9.5.4"></a><h4>Members</h4>

1462

1463

1464

1465

1466

1467

</colgroup>

1468

<tbody>

1469

<tr>

1470

<td class="enum_member_name"><p><a name="GST-VIDEO-OVERLAY-FORMAT-FLAG-NONE:CAPS"></a>GST_VIDEO_OVERLAY_FORMAT_FLAG_NONE</p></td>

1471

1472

<p>no flags</p>

1473

</td>

1474

1475

</tr>

1476

<tr>

1477

<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>

1478

1479

<p>RGB are premultiplied by A/255.</p>

1480

</td>

1481

1482

</tr>

1483

<tr>

1484

<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>

1485

1486

<p>a global-alpha value != 1 is set.</p>

1487

</td>

1488

1489

</tr>

1490

</tbody>

1491

</table></div>

1492

</div>

1493

</div>

1494

<hr>

1495

1496

<a name="GstVideoOverlayRectangle"></a><h3>GstVideoOverlayRectangle</h3>

1497

<pre class="programlisting">typedef struct _GstVideoOverlayRectangle GstVideoOverlayRectangle;</pre>

1498

<p>An opaque video overlay rectangle object. A rectangle contains a single

1499

overlay rectangle which can be added to a composition.</p>

1500

</div>

1501

</div>

1502

</div>

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<hr>

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Generated by GTK-Doc V1.19</div>

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Generated by GTK-Doc V1.20</div>

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</html>

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