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/* GStreamer X-based Overlay
* Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
*
* tv-mixer.c: tv-mixer design virtual class function wrappers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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 Library General Public
* License along with this library; 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 "xoverlay.h"
enum {
HAVE_XWINDOW_ID,
DESIRED_SIZE,
LAST_SIGNAL
};
static guint gst_x_overlay_signals[LAST_SIGNAL] = { 0 };
static void gst_x_overlay_base_init (gpointer g_class);
GType
gst_x_overlay_get_type (void)
{
static GType gst_x_overlay_type = 0;
if (!gst_x_overlay_type) {
static const GTypeInfo gst_x_overlay_info = {
sizeof (GstXOverlayClass),
gst_x_overlay_base_init,
NULL,
NULL,
NULL,
NULL,
0,
0,
NULL,
};
gst_x_overlay_type = g_type_register_static (G_TYPE_INTERFACE,
"GstXOverlay",
&gst_x_overlay_info, 0);
g_type_interface_add_prerequisite (gst_x_overlay_type,
GST_TYPE_IMPLEMENTS_INTERFACE);
}
return gst_x_overlay_type;
}
/* FIXME: evil hack, we should figure out our marshal handling in this interfaces some day */
extern void gst_marshal_VOID__INT_INT (GClosure *closure, GValue *return_value, guint n_param_values,
const GValue *param_values, gpointer invocation_hint, gpointer marshal_data);
static void
gst_x_overlay_base_init (gpointer g_class)
{
GstXOverlayClass *overlay_class = (GstXOverlayClass *) g_class;
static gboolean initialized = FALSE;
if (! initialized)
{
gst_x_overlay_signals[HAVE_XWINDOW_ID] =
g_signal_new ("have_xwindow_id",
GST_TYPE_X_OVERLAY, G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstXOverlayClass, have_xwindow_id),
NULL, NULL,
g_cclosure_marshal_VOID__INT, G_TYPE_NONE, 1,
G_TYPE_INT);
gst_x_overlay_signals[DESIRED_SIZE] =
g_signal_new ("desired_size_changed",
GST_TYPE_X_OVERLAY, G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstXOverlayClass, desired_size),
NULL, NULL,
gst_marshal_VOID__INT_INT, G_TYPE_NONE, 2,
G_TYPE_INT, G_TYPE_INT);
initialized = TRUE;
}
overlay_class->set_xwindow_id = NULL;
}
/**
* gst_x_overlay_set_xwindow_id:
* @overlay: a #GstXOverlay to set the XWindow on.
* @xwindow_id: a #XID referencing the XWindow.
*
* This will call the video overlay's set_xwindow_id method. You should
* use this method to tell to a XOverlay to display video output to a
* specific XWindow. Passing 0 as the xwindow_id will tell the overlay to
* stop using that window and create an internal one.
*/
void
gst_x_overlay_set_xwindow_id (GstXOverlay *overlay, XID xwindow_id)
{
GstXOverlayClass *klass = GST_X_OVERLAY_GET_CLASS (overlay);
if (klass->set_xwindow_id) {
klass->set_xwindow_id (overlay, xwindow_id);
}
}
/**
* gst_x_overlay_got_xwindow_id:
* @overlay: a #GstXOverlay which got a XWindow.
* @xwindow_id: a #XID referencing the XWindow.
*
* This will fire an have_xwindow_id signal.
*
* This function should be used by video overlay developpers.
*/
void
gst_x_overlay_got_xwindow_id (GstXOverlay *overlay, XID xwindow_id)
{
g_return_if_fail (overlay != NULL);
g_return_if_fail (GST_IS_X_OVERLAY (overlay));
g_signal_emit (G_OBJECT (overlay),
gst_x_overlay_signals[HAVE_XWINDOW_ID], 0, (gint) xwindow_id);
}
/**
* gst_x_overlay_get_desired_size:
* @overlay: a #GstXOverlay which got a XWindow.
* @width: pointer to a gint taking the width or NULL.
* @height: pointer to a gint taking the height or NULL.
*
* Gets the desired size of the overlay. If the overlay doesn't know its desired
* size, width and height are set to 0.
*/
void
gst_x_overlay_get_desired_size (GstXOverlay *overlay, guint *width, guint *height)
{
guint width_tmp, height_tmp;
GstXOverlayClass *klass;
g_return_if_fail (G_TYPE_CHECK_INSTANCE_TYPE ((overlay), GST_TYPE_X_OVERLAY));
klass = GST_X_OVERLAY_GET_CLASS (overlay);
if (klass->get_desired_size && GST_IS_X_OVERLAY (overlay)) {
/* this ensures that elements don't need to check width and height for NULL
but apps may use NULL */
klass->get_desired_size (overlay, width ? width : &width_tmp, height ? height : &height_tmp);
} else {
if (width)
*width = 0;
if (height)
*height = 0;
}
}
/**
* gst_x_overlay_got_desired_size:
* @overlay: a #GstXOverlay which changed its desired size.
* @width: The new desired width
* @height: The new desired height
*
* This will fire a "desired_size_changed" signal.
*
* This function should be used by video overlay developpers.
*/
void
gst_x_overlay_got_desired_size (GstXOverlay *overlay, guint width, guint height)
{
g_return_if_fail (GST_IS_X_OVERLAY (overlay));
g_signal_emit (G_OBJECT (overlay),
gst_x_overlay_signals[DESIRED_SIZE], 0, width, height);
}
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