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/*
* GStreamer Video Overlay interface.
*
* Copyright (C) <2003> Julien Moutte <julien@moutte.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstvideooverlay.h"
/* VideoSink signals and args */
enum {
HAVE_VIDEO_OVERLAY,
HAVE_SIZE,
LAST_SIGNAL
};
static guint gst_video_overlay_signals[LAST_SIGNAL] = { 0 };
/* Initing stuff */
static void
gst_video_overlay_base_init (gpointer g_class)
{
static gboolean initialized = FALSE;
if (! initialized)
{
gst_video_overlay_signals[HAVE_SIZE] =
g_signal_new ("have_size",
GST_TYPE_VIDEO_OVERLAY, G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstVideoOverlayInterface, have_size),
NULL, NULL,
gst_marshal_VOID__INT_INT, G_TYPE_NONE, 2,
G_TYPE_UINT, G_TYPE_UINT);
gst_video_overlay_signals[HAVE_VIDEO_OVERLAY] =
g_signal_new ("have_video_overlay",
GST_TYPE_VIDEO_OVERLAY, G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstVideoOverlayInterface, have_video_overlay),
NULL, NULL,
g_cclosure_marshal_VOID__POINTER, G_TYPE_NONE, 1,
G_TYPE_POINTER);
initialized = TRUE;
}
}
/* Public virtual methods */
/**
* gst_video_overlay_set_video_overlay:
* @overlay: a #GstVideoOverlay to set the video overlay on.
* @video_out: the #gpointer linking to video overlay.
*
* This will call the video overlay's set_video_overlay method. You should
* use this method to tell to a video overlay to display video output to a
* specific video overlay resource.
*/
void
gst_video_overlay_set_video_overlay (GstVideoOverlay *overlay,
GstVideoOverlayResource *resource)
{
GstVideoOverlayInterface *interface;
g_return_if_fail (overlay != NULL);
g_return_if_fail (GST_IS_VIDEO_OVERLAY (overlay));
interface = GST_VIDEO_OVERLAY_GET_INTERFACE (overlay);
if (interface->set_video_out)
interface->set_video_out (overlay, resource);
}
/* Public methods */
/**
* gst_video_overlay_got_video_overlay:
* @overlay: a #GstVideoOverlay which got a video overlay resource.
* @video_out: a #gpointer linking to the video overlay ressource.
*
* This will fire an have_video_out signal.
*
* This function should be used by video overlay developpers.
*/
void
gst_video_overlay_got_video_overlay (GstVideoOverlay *overlay,
GstVideoOverlayResource *resource)
{
g_return_if_fail (overlay != NULL);
g_return_if_fail (GST_IS_VIDEO_OVERLAY (overlay));
g_signal_emit (G_OBJECT (overlay),
gst_video_overlay_signals[HAVE_VIDEO_OVERLAY], 0, resource);
}
/**
* gst_video_overlay_got_video_size:
* @overlay: a #GstVideoOverlay which received video geometry.
* @width: a width as a #gint.
* @height: a height as a #gint.
*
* This will fire an have_size signal.
*
* This function should be used by video overlay developpers.
*/
void
gst_video_overlay_got_video_size (GstVideoOverlay *overlay,
gint width, gint height)
{
g_return_if_fail (overlay != NULL);
g_return_if_fail (GST_IS_VIDEO_OVERLAY (overlay));
g_signal_emit (G_OBJECT (overlay), gst_video_overlay_signals[HAVE_SIZE],
0, width, height);
}
GType
gst_video_overlay_get_type (void)
{
static GType overlay_type = 0;
if (!overlay_type)
{
static const GTypeInfo overlay_info = {
sizeof (GstVideoOverlayInterface), /* class_size */
gst_video_overlay_base_init, /* base_init */
NULL,
NULL,
NULL,
NULL,
0,
0,
NULL
};
overlay_type = g_type_register_static (G_TYPE_INTERFACE,
"GstVideoOverlay",
&overlay_info, 0);
g_type_interface_add_prerequisite (overlay_type,
GST_TYPE_INTERFACE);
}
return overlay_type;
}
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