From aa94247770732a40e46ab3d539dd9987062abef4 Mon Sep 17 00:00:00 2001 From: "Ronald S. Bultje" Date: Fri, 10 Oct 2003 12:47:42 +0000 Subject: Some interface implementations for video4linux/video4linux2 plugins: a Tuner interface, with which one can select inp... 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! --- sys/v4l2/gstv4l2xoverlay.c | 128 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 128 insertions(+) create mode 100644 sys/v4l2/gstv4l2xoverlay.c (limited to 'sys/v4l2/gstv4l2xoverlay.c') diff --git a/sys/v4l2/gstv4l2xoverlay.c b/sys/v4l2/gstv4l2xoverlay.c new file mode 100644 index 00000000..10c5f77b --- /dev/null +++ b/sys/v4l2/gstv4l2xoverlay.c @@ -0,0 +1,128 @@ +/* GStreamer X-based overlay interface implementation + * Copyright (C) 2003 Ronald Bultje + * + * gstv4l2xoverlay.c: X-based overlay interface implementation for V4L2 + * + * 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 +#include +#include + +#include "gstv4l2xoverlay.h" +#include "gstv4l2element.h" +#include "v4l2_calls.h" + +static void gst_v4l2_xoverlay_set_xwindow_id (GstXOverlay *overlay, + XID xwindow_id); + +void +gst_v4l2_xoverlay_interface_init (GstXOverlayClass *klass) +{ + /* default virtual functions */ + klass->set_xwindow_id = gst_v4l2_xoverlay_set_xwindow_id; +} + +GstXWindowListener * +gst_v4l2_xoverlay_new (GstV4l2Element *v4l2element) +{ + GstXWindowListener *xwin = + gst_x_window_listener_new (NULL, + (MapWindowFunc) gst_v4l2_enable_overlay, + (SetWindowFunc) gst_v4l2_set_window, + (gpointer) v4l2element); + + v4l2element->overlay = xwin; + v4l2element->xwindow_id = 0; + + return xwin; +} + +void +gst_v4l2_xoverlay_free (GstV4l2Element *v4l2element) +{ + gst_v4l2_xoverlay_close (v4l2element); + g_object_unref (G_OBJECT (v4l2element->overlay)); + v4l2element->overlay = NULL; +} + +void +gst_v4l2_xoverlay_open (GstV4l2Element *v4l2element) +{ + GstXWindowListener *xwin = v4l2element->overlay; + + if (xwin) { + xwin->display_name = g_strdup (v4l2element->display); + + if (v4l2element->xwindow_id != 0 && + xwin->display_name && + xwin->display_name[0] == ':') { + gst_x_window_listener_set_xid (xwin, v4l2element->xwindow_id); + } + } +} + +void +gst_v4l2_xoverlay_close (GstV4l2Element *v4l2element) +{ + GstXWindowListener *xwin = v4l2element->overlay; + + if (xwin != NULL) { + if (v4l2element->xwindow_id != 0 && + xwin->display_name && + xwin->display_name[0] == ':') { + gst_x_window_listener_set_xid (xwin, 0); + } + + g_free (xwin->display_name); + xwin->display_name = NULL; + } +} + +static void +gst_v4l2_xoverlay_set_xwindow_id (GstXOverlay *overlay, + XID xwindow_id) +{ + GstV4l2Element *v4l2element = GST_V4L2ELEMENT (overlay); + GstXWindowListener *xwin = v4l2element->overlay; + + if (v4l2element->xwindow_id == xwindow_id) { + return; + } + + if (gst_element_get_state (GST_ELEMENT (v4l2element)) != GST_STATE_NULL && + v4l2element->xwindow_id != 0 && + xwin != NULL && + xwin->display_name && + xwin->display_name[0] == ':') { + gst_x_window_listener_set_xid (xwin, 0); + } + + v4l2element->xwindow_id = xwindow_id; + + if (gst_element_get_state (GST_ELEMENT (v4l2element)) != GST_STATE_NULL && + v4l2element->xwindow_id != 0 && + xwin != NULL && + xwin->display_name && + xwin->display_name[0] == ':') { + gst_x_window_listener_set_xid (xwin, v4l2element->xwindow_id); + } +} -- cgit v1.2.1