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0f124a569d
Original commit message from CVS: Some interface implementations for video4linux/video4linux2 plugins: * a Tuner interface, with which one can select inputs and stations. Audio work is underway here, but unfinished. * A Xoverlay interface with which one can do simple overlay. Similar to the API of the v4l/Xv XFree86 extension. Widget implementation for GTK-2.0 coming up in the sandbox. * Colorbalance - for adapting colors (brightness, contrast, etc.) - pretty basic and maybe somewhat overdesigned. But it'll do for now. Apart from these interfaces, there's also a loadable library 'xwindowlistener' that listenes to X for the movement of a window and the overlap of other windows. This is partly copied from xawtv (and thus partly GPL :(), but it's needed for the xoverlay interface implementation in the v4l/v4l2 elements. Lastly, some small changes to remove redundant properties from the v4l/v4l2 elements since these can be done much simpler. Comments appreciated!
126 lines
3.4 KiB
C
126 lines
3.4 KiB
C
/* GStreamer X-based overlay interface implementation
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* Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
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*
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* gstv4lxoverlay.c: X-based overlay interface implementation for V4L
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#include <gst/xoverlay/xoverlay.h>
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#include <gst/xwindowlistener/xwindowlistener.h>
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#include "gstv4lxoverlay.h"
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#include "gstv4lelement.h"
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#include "v4l_calls.h"
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static void gst_v4l_xoverlay_set_xwindow_id (GstXOverlay *overlay,
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XID xwindow_id);
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void
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gst_v4l_xoverlay_interface_init (GstXOverlayClass *klass)
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{
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/* default virtual functions */
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klass->set_xwindow_id = gst_v4l_xoverlay_set_xwindow_id;
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}
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GstXWindowListener *
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gst_v4l_xoverlay_new (GstV4lElement *v4lelement)
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{
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GstXWindowListener *xwin =
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gst_x_window_listener_new (NULL,
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(MapWindowFunc) gst_v4l_enable_overlay,
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(SetWindowFunc) gst_v4l_set_window,
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(gpointer) v4lelement);
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v4lelement->overlay = xwin;
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v4lelement->xwindow_id = 0;
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return xwin;
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}
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void
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gst_v4l_xoverlay_free (GstV4lElement *v4lelement)
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{
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gst_v4l_xoverlay_close (v4lelement);
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g_object_unref (G_OBJECT (v4lelement->overlay));
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v4lelement->overlay = NULL;
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}
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void
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gst_v4l_xoverlay_open (GstV4lElement *v4lelement)
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{
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GstXWindowListener *xwin = v4lelement->overlay;
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if (xwin != NULL) {
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xwin->display_name = g_strdup (v4lelement->display);
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if (v4lelement->xwindow_id != 0 &&
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xwin->display_name &&
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xwin->display_name[0] == ':') {
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gst_x_window_listener_set_xid (xwin, v4lelement->xwindow_id);
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}
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}
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}
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void
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gst_v4l_xoverlay_close (GstV4lElement *v4lelement)
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{
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GstXWindowListener *xwin = v4lelement->overlay;
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if (xwin != NULL) {
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if (v4lelement->xwindow_id != 0 &&
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xwin->display_name &&
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xwin->display_name[0] == ':') {
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gst_x_window_listener_set_xid (xwin, 0);
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}
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g_free (xwin->display_name);
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xwin->display_name = NULL;
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}
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}
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static void
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gst_v4l_xoverlay_set_xwindow_id (GstXOverlay *overlay,
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XID xwindow_id)
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{
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GstV4lElement *v4lelement = GST_V4LELEMENT (overlay);
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GstXWindowListener *xwin = v4lelement->overlay;
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if (v4lelement->xwindow_id == xwindow_id) {
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return;
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}
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if (gst_element_get_state (GST_ELEMENT (v4lelement)) != GST_STATE_NULL &&
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v4lelement->xwindow_id != 0 &&
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xwin && xwin->display_name &&
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xwin->display_name[0] == ':') {
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gst_x_window_listener_set_xid (xwin, 0);
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}
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v4lelement->xwindow_id = xwindow_id;
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if (gst_element_get_state (GST_ELEMENT (v4lelement)) != GST_STATE_NULL &&
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v4lelement->xwindow_id != 0 &&
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xwin && xwin->display_name &&
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xwin->display_name[0] == ':') {
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gst_x_window_listener_set_xid (xwin, v4lelement->xwindow_id);
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}
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}
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