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b76595d67e
Set positioning-mode=pixels-absolute to allow positioning with absolute coordinates, meaning negative x/y offsets will be interpreted as being to the left/above the video frame instead of being interpreted as relative to the right/bottom edge of the video frame (which is a silly default, but that's how it is). This means we can nicely slide images into and out of the frame, see gdkpixbufoverlay-test. https://bugzilla.gnome.org/show_bug.cgi?id=739566
91 lines
2.9 KiB
C
91 lines
2.9 KiB
C
/* GStreamer GdkPixbuf overlay
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* Copyright (C) 2012-2014 Tim-Philipp Müller <tim centricular net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef _GST_GDK_PIXBUF_OVERLAY_H_
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#define _GST_GDK_PIXBUF_OVERLAY_H_
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#include <gst/video/video.h>
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#include <gst/video/gstvideofilter.h>
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#include <gst/video/video-overlay-composition.h>
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#include <gdk-pixbuf/gdk-pixbuf.h>
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G_BEGIN_DECLS
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#define GST_TYPE_GDK_PIXBUF_OVERLAY (gst_gdk_pixbuf_overlay_get_type())
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#define GST_GDK_PIXBUF_OVERLAY(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GDK_PIXBUF_OVERLAY,GstGdkPixbufOverlay))
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#define GST_GDK_PIXBUF_OVERLAY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GDK_PIXBUF_OVERLAY,GstGdkPixbufOverlayClass))
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#define GST_IS_GDK_PIXBUF_OVERLAY(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GDK_PIXBUF_OVERLAY))
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#define GST_IS_GDK_PIXBUF_OVERLAY_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GDK_PIXBUF_OVERLAY))
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typedef struct _GstGdkPixbufOverlay GstGdkPixbufOverlay;
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typedef struct _GstGdkPixbufOverlayClass GstGdkPixbufOverlayClass;
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typedef enum {
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GST_GDK_PIXBUF_POSITIONING_PIXELS_RELATIVE_TO_EDGES,
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GST_GDK_PIXBUF_POSITIONING_PIXELS_ABSOLUTE
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} GstGdkPixbufPositioningMode;
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/**
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* GstGdkPixbufOverlay:
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*
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* The opaque element instance structure.
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*/
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struct _GstGdkPixbufOverlay
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{
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GstVideoFilter videofilter;
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/* properties */
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gchar * location;
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/* pixbuf set via pixbuf property */
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GdkPixbuf * pixbuf;
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gint offset_x;
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gint offset_y;
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gdouble relative_x;
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gdouble relative_y;
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GstGdkPixbufPositioningMode positioning_mode;
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gint overlay_width;
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gint overlay_height;
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gdouble alpha;
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/* the loaded image, as BGRA/ARGB pixels, with GstVideoMeta */
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GstBuffer * pixels; /* OBJECT_LOCK */
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GstVideoOverlayComposition * comp;
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/* render position or dimension has changed */
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gboolean update_composition;
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};
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struct _GstGdkPixbufOverlayClass
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{
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GstVideoFilterClass videofilter_class;
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};
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GType gst_gdk_pixbuf_overlay_get_type (void);
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G_END_DECLS
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#endif
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