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!

1 files changed, 73 insertions, 0 deletions

diff --git a/gst-libs/gst/colorbalance/colorbalance.h b/gst-libs/gst/colorbalance/colorbalance.h
new file mode 100644
index 00000000..2b9d27d3
--- /dev/null
+++ b/gst-libs/gst/colorbalance/colorbalance.h
@@ -0,0 +1,73 @@
+/* GStreamer Color Balance
+ * Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
+ *
+ * color-balance.h: image color balance interface design
+ *
+ * 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.
+ */
+
+#ifndef __GST_COLOR_BALANCE_H__
+#define __GST_COLOR_BALANCE_H__
+
+#include <gst/gst.h>
+#include <gst/colorbalance/colorbalancechannel.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_COLOR_BALANCE \
+  (gst_color_balance_get_type ())
+#define GST_COLOR_BALANCE(obj) \
+  (GST_INTERFACE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_COLOR_BALANCE, \
+				      GstColorBalance))
+#define GST_COLOR_BALANCE_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_COLOR_BALANCE, \
+			    GstColorBalanceClass))
+#define GST_IS_COLOR_BALANCE(obj) \
+  (GST_INTERFACE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_COLOR_BALANCE))
+#define GST_IS_COLOR_BALANCE_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_COLOR_BALANCE))
+#define GST_COLOR_BALANCE_GET_CLASS(inst) \
+  (G_TYPE_INSTANCE_GET_INTERFACE ((inst), GST_TYPE_COLOR_BALANCE, GstColorBalanceClass))
+
+typedef struct _GstColorBalance GstColorBalance;
+
+typedef struct _GstColorBalanceClass {
+  GTypeInterface klass;
+
+  /* virtual functions */
+  const GList * (* list_channels) (GstColorBalance        *balance);
+
+  void          (* set_value)     (GstColorBalance        *balance,
+				   GstColorBalanceChannel *channel,
+				   gint                    value);
+  gint          (* get_value)     (GstColorBalance        *balance,
+				   GstColorBalanceChannel *channel);
+} GstColorBalanceClass;
+
+GType	gst_color_balance_get_type	(void);
+
+/* virtual class function wrappers */
+const GList *
+	gst_color_balance_list_channels	(GstColorBalance        *balance);
+void	gst_color_balance_set_value	(GstColorBalance        *balance,
+					 GstColorBalanceChannel *channel,
+					 gint                    value);
+gint	gst_color_balance_get_value	(GstColorBalance        *balance,
+					 GstColorBalanceChannel *channel);
+
+G_END_DECLS
+
+#endif /* __GST_COLOR_BALANCE_H__ */