gstreamer/gst-libs/gst/interfaces/tunerchannel.c
Ronald S. Bultje 0f124a569d 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!
2003-10-10 12:47:41 +00:00

114 lines
3.2 KiB
C

/* GStreamer Tuner
* Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
*
* tunerchannel.c: tuner channel object 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "tunerchannel.h"
enum {
/* FILL ME */
SIGNAL_FREQUENCY_CHANGED,
SIGNAL_SIGNAL_CHANGED,
LAST_SIGNAL
};
static void gst_tuner_channel_class_init (GstTunerChannelClass *klass);
static void gst_tuner_channel_init (GstTunerChannel *channel);
static void gst_tuner_channel_dispose (GObject *object);
static GObjectClass *parent_class = NULL;
static guint signals[LAST_SIGNAL] = { 0 };
GType
gst_tuner_channel_get_type (void)
{
static GType gst_tuner_channel_type = 0;
if (!gst_tuner_channel_type) {
static const GTypeInfo tuner_channel_info = {
sizeof (GstTunerChannelClass),
NULL,
NULL,
(GClassInitFunc) gst_tuner_channel_class_init,
NULL,
NULL,
sizeof (GstTunerChannel),
0,
(GInstanceInitFunc) gst_tuner_channel_init,
NULL
};
gst_tuner_channel_type =
g_type_register_static (G_TYPE_OBJECT,
"GstTunerChannel",
&tuner_channel_info, 0);
}
return gst_tuner_channel_type;
}
static void
gst_tuner_channel_class_init (GstTunerChannelClass *klass)
{
GObjectClass *object_klass = (GObjectClass *) klass;
parent_class = g_type_class_ref (G_TYPE_OBJECT);
signals[SIGNAL_FREQUENCY_CHANGED] =
g_signal_new ("frequency_changed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstTunerChannelClass,
frequency_changed),
NULL, NULL, g_cclosure_marshal_VOID__ULONG,
G_TYPE_NONE, 1, G_TYPE_ULONG);
signals[SIGNAL_SIGNAL_CHANGED] =
g_signal_new ("signal_changed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstTunerChannelClass,
signal_changed),
NULL, NULL, g_cclosure_marshal_VOID__INT,
G_TYPE_NONE, 1, G_TYPE_INT);
object_klass->dispose = gst_tuner_channel_dispose;
}
static void
gst_tuner_channel_init (GstTunerChannel *channel)
{
channel->label = NULL;
channel->flags = 0;
channel->min_frequency = channel->max_frequency = 0;
channel->min_signal = channel->max_signal = 0;
}
static void
gst_tuner_channel_dispose (GObject *object)
{
GstTunerChannel *channel = GST_TUNER_CHANNEL (object);
if (channel->label)
g_free (channel->label);
if (parent_class->dispose)
parent_class->dispose (object);
}