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gst-libs/gst/xoverlay/xoverlay.*: Add optional "desired size" signal and querying.

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Original commit message from CVS:
2004-01-04  Benjamin Otte  <in7y118@public.uni-hamburg.de>

* gst-libs/gst/xoverlay/xoverlay.c: (gst_x_overlay_base_init),
(gst_x_overlay_got_xwindow_id), (gst_x_overlay_get_desired_size),
(gst_x_overlay_got_desired_size):
* gst-libs/gst/xoverlay/xoverlay.h:
Add optional "desired size" signal and querying.
This commit is contained in:
Benjamin Otte 2004-01-04 18:02:30 +00:00
parent 2efa489c0e
commit 80c3453c87
3 changed files with 82 additions and 3 deletions
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8
ChangeLog
View file

@ -1,3 +1,11 @@
2004-01-04 Benjamin Otte <in7y118@public.uni-hamburg.de>
* gst-libs/gst/xoverlay/xoverlay.c: (gst_x_overlay_base_init),
(gst_x_overlay_got_xwindow_id), (gst_x_overlay_get_desired_size),
(gst_x_overlay_got_desired_size):
* gst-libs/gst/xoverlay/xoverlay.h:
Add optional "desired size" signal and querying.
2004-01-04 Ronald Bultje <rbultje@ronald.bitfreak.net>
* gst/matroska/matroska-demux.c:

68
gst-libs/gst/xoverlay/xoverlay.c
View file

@ -27,6 +27,7 @@
enum {
HAVE_XWINDOW_ID,
DESIRED_SIZE,
LAST_SIGNAL
};
@ -62,6 +63,10 @@ gst_x_overlay_get_type (void)
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)
{
@ -75,8 +80,15 @@ gst_x_overlay_base_init (gpointer g_class)
GST_TYPE_X_OVERLAY, G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstXOverlayClass, have_xwindow_id),
NULL, NULL,
g_cclosure_marshal_VOID__POINTER, G_TYPE_NONE, 1,
G_TYPE_POINTER);
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;
}
@ -119,5 +131,55 @@ gst_x_overlay_got_xwindow_id (GstXOverlay *overlay, XID xwindow_id)
g_return_if_fail (GST_IS_X_OVERLAY (overlay));
g_signal_emit (G_OBJECT (overlay),
gst_x_overlay_signals[HAVE_XWINDOW_ID], 0, xwindow_id);
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);
}

9
gst-libs/gst/xoverlay/xoverlay.h
View file

@ -50,10 +50,17 @@ typedef struct _GstXOverlayClass {
/* virtual functions */
void (* set_xwindow_id) (GstXOverlay *overlay,
XID xwindow_id);
/* optional virtual functions */
void (* get_desired_size) (GstXOverlay *overlay,
guint *width,
guint *height);
/* signals */
void (*have_xwindow_id) (GstXOverlay *overlay,
XID xwindow_id);
void (* desired_size) (GstXOverlay *overlay,
guint width,
guint height);
gpointer _gst_reserved[GST_PADDING];
} GstXOverlayClass;
@ -62,9 +69,11 @@ GType gst_x_overlay_get_type (void);
/* virtual class function wrappers */
void gst_x_overlay_set_xwindow_id (GstXOverlay *overlay, XID xwindow_id);
void gst_x_overlay_get_desired_size (GstXOverlay *overlay, guint *width, guint *height);
/* public methods to fire signals */
void gst_x_overlay_got_xwindow_id (GstXOverlay *overlay, XID xwindow_id);
void gst_x_overlay_got_desired_size (GstXOverlay *overlay, guint width, guint height);
G_END_DECLS