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/* GStreamer Tuner
* Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
*
* tuner.c: tuner design virtual class function wrappers
*
* 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 "tuner.h"
static void gst_tuner_class_init (GstTunerClass *klass);
GType
gst_tuner_get_type (void)
{
static GType gst_tuner_type = 0;
if (!gst_tuner_type) {
static const GTypeInfo gst_tuner_info = {
sizeof (GstTunerClass),
(GBaseInitFunc) gst_tuner_class_init,
NULL,
NULL,
NULL,
NULL,
0,
0,
NULL,
};
gst_tuner_type = g_type_register_static (G_TYPE_INTERFACE,
"GstTuner",
&gst_tuner_info, 0);
g_type_interface_add_prerequisite (gst_tuner_type,
GST_TYPE_INTERFACE);
}
return gst_tuner_type;
}
static void
gst_tuner_class_init (GstTunerClass *klass)
{
/* default virtual functions */
klass->list_channels = NULL;
klass->set_channel = NULL;
klass->get_channel = NULL;
klass->list_norms = NULL;
klass->set_norm = NULL;
klass->get_norm = NULL;
klass->set_frequency = NULL;
klass->get_frequency = NULL;
klass->signal_strength = NULL;
}
const GList *
gst_tuner_list_channels (GstTuner *tuner)
{
GstTunerClass *klass = GST_TUNER_GET_CLASS (tuner);
if (klass->list_channels) {
return klass->list_channels (tuner);
}
return NULL;
}
void
gst_tuner_set_channel (GstTuner *tuner,
GstTunerChannel *channel)
{
GstTunerClass *klass = GST_TUNER_GET_CLASS (tuner);
if (klass->set_channel) {
klass->set_channel (tuner, channel);
}
}
const GstTunerChannel *
gst_tuner_get_channel (GstTuner *tuner)
{
GstTunerClass *klass = GST_TUNER_GET_CLASS (tuner);
if (klass->get_channel) {
return klass->get_channel (tuner);
}
return NULL;
}
const GList *
gst_tuner_list_norms (GstTuner *tuner)
{
GstTunerClass *klass = GST_TUNER_GET_CLASS (tuner);
if (klass->list_norms) {
return klass->list_norms (tuner);
}
return NULL;
}
void
gst_tuner_set_norm (GstTuner *tuner,
GstTunerNorm *norm)
{
GstTunerClass *klass = GST_TUNER_GET_CLASS (tuner);
if (klass->set_norm) {
klass->set_norm (tuner, norm);
}
}
const GstTunerNorm *
gst_tuner_get_norm (GstTuner *tuner)
{
GstTunerClass *klass = GST_TUNER_GET_CLASS (tuner);
if (klass->get_norm) {
return klass->get_norm (tuner);
}
return NULL;
}
void
gst_tuner_set_frequency (GstTuner *tuner,
GstTunerChannel *channel,
gulong frequency)
{
GstTunerClass *klass = GST_TUNER_GET_CLASS (tuner);
g_return_if_fail (GST_TUNER_CHANNEL_HAS_FLAG (channel,
GST_TUNER_CHANNEL_FREQUENCY));
if (klass->set_frequency) {
klass->set_frequency (tuner, channel, frequency);
}
}
gulong
gst_tuner_get_frequency (GstTuner *tuner,
GstTunerChannel *channel)
{
GstTunerClass *klass = GST_TUNER_GET_CLASS (tuner);
g_return_val_if_fail (GST_TUNER_CHANNEL_HAS_FLAG (channel,
GST_TUNER_CHANNEL_FREQUENCY), 0);
if (klass->get_frequency) {
return klass->get_frequency (tuner, channel);
}
return 0;
}
gint
gst_tuner_signal_strength (GstTuner *tuner,
GstTunerChannel *channel)
{
GstTunerClass *klass = GST_TUNER_GET_CLASS (tuner);
g_return_val_if_fail (GST_TUNER_CHANNEL_HAS_FLAG (channel,
GST_TUNER_CHANNEL_FREQUENCY), 0);
if (klass->signal_strength) {
return klass->signal_strength (tuner, channel);
}
return 0;
}
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