gstreamer/sys/v4l/gstv4ltuner.c

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/* GStreamer Tuner interface implementation
* Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
*
* gstv4ltuner.c: tuner interface implementation for V4L
*
* 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 <gst/gst.h>
#include <gst/tuner/tuner.h>
#include "gstv4ltuner.h"
#include "gstv4lelement.h"
#include "v4l_calls.h"
static void gst_v4l_tuner_channel_class_init(GstV4lTunerChannelClass *klass);
static void gst_v4l_tuner_channel_init (GstV4lTunerChannel *channel);
static void gst_v4l_tuner_norm_class_init (GstV4lTunerNormClass *klass);
static void gst_v4l_tuner_norm_init (GstV4lTunerNorm *norm);
static const GList *
gst_v4l_tuner_list_channels (GstTuner *tuner);
static void gst_v4l_tuner_set_channel (GstTuner *tuner,
GstTunerChannel *channel);
static const GstTunerChannel *
gst_v4l_tuner_get_channel (GstTuner *tuner);
static const GList *
gst_v4l_tuner_list_norms (GstTuner *tuner);
static void gst_v4l_tuner_set_norm (GstTuner *tuner,
GstTunerNorm *norm);
static const GstTunerNorm *
gst_v4l_tuner_get_norm (GstTuner *tuner);
static void gst_v4l_tuner_set_frequency (GstTuner *tuner,
GstTunerChannel *channel,
gulong frequency);
static gulong gst_v4l_tuner_get_frequency (GstTuner *tuner,
GstTunerChannel *channel);
static gint gst_v4l_tuner_signal_strength (GstTuner *tuner,
GstTunerChannel *channel);
static GstTunerNormClass *norm_parent_class = NULL;
static GstTunerChannelClass *channel_parent_class = NULL;
GType
gst_v4l_tuner_channel_get_type (void)
{
static GType gst_v4l_tuner_channel_type = 0;
if (!gst_v4l_tuner_channel_type) {
static const GTypeInfo v4l_tuner_channel_info = {
sizeof (GstV4lTunerChannelClass),
NULL,
NULL,
(GClassInitFunc) gst_v4l_tuner_channel_class_init,
NULL,
NULL,
sizeof (GstV4lTunerChannel),
0,
(GInstanceInitFunc) gst_v4l_tuner_channel_init,
NULL
};
gst_v4l_tuner_channel_type =
g_type_register_static (GST_TYPE_TUNER_CHANNEL,
"GstV4lTunerChannel",
&v4l_tuner_channel_info, 0);
}
return gst_v4l_tuner_channel_type;
}
static void
gst_v4l_tuner_channel_class_init (GstV4lTunerChannelClass *klass)
{
channel_parent_class = g_type_class_ref (GST_TYPE_TUNER_CHANNEL);
}
static void
gst_v4l_tuner_channel_init (GstV4lTunerChannel *channel)
{
channel->index = 0;
channel->audio = 0;
channel->tuner = 0;
}
GType
gst_v4l_tuner_norm_get_type (void)
{
static GType gst_v4l_tuner_norm_type = 0;
if (!gst_v4l_tuner_norm_type) {
static const GTypeInfo v4l_tuner_norm_info = {
sizeof (GstV4lTunerNormClass),
NULL,
NULL,
(GClassInitFunc) gst_v4l_tuner_norm_class_init,
NULL,
NULL,
sizeof (GstV4lTunerNorm),
0,
(GInstanceInitFunc) gst_v4l_tuner_norm_init,
NULL
};
gst_v4l_tuner_norm_type =
g_type_register_static (GST_TYPE_TUNER_NORM,
"GstV4lTunerNorm",
&v4l_tuner_norm_info, 0);
}
return gst_v4l_tuner_norm_type;
}
static void
gst_v4l_tuner_norm_class_init (GstV4lTunerNormClass *klass)
{
norm_parent_class = g_type_class_ref (GST_TYPE_TUNER_NORM);
}
static void
gst_v4l_tuner_norm_init (GstV4lTunerNorm *norm)
{
norm->index = 0;
}
void
gst_v4l_tuner_interface_init (GstTunerClass *klass)
{
/* default virtual functions */
klass->list_channels = gst_v4l_tuner_list_channels;
klass->set_channel = gst_v4l_tuner_set_channel;
klass->get_channel = gst_v4l_tuner_get_channel;
klass->list_norms = gst_v4l_tuner_list_norms;
klass->set_norm = gst_v4l_tuner_set_norm;
klass->get_norm = gst_v4l_tuner_get_norm;
klass->set_frequency = gst_v4l_tuner_set_frequency;
klass->get_frequency = gst_v4l_tuner_get_frequency;
klass->signal_strength = gst_v4l_tuner_signal_strength;
}
static gboolean
gst_v4l_tuner_contains_channel (GstV4lElement *v4lelement,
GstV4lTunerChannel *v4lchannel)
{
const GList *item;
for (item = v4lelement->channels; item != NULL; item = item->next)
if (item->data == v4lchannel)
return TRUE;
return FALSE;
}
static const GList *
gst_v4l_tuner_list_channels (GstTuner *tuner)
{
return GST_V4LELEMENT (tuner)->channels;
}
static void
gst_v4l_tuner_set_channel (GstTuner *tuner,
GstTunerChannel *channel)
{
GstV4lElement *v4lelement = GST_V4LELEMENT (tuner);
GstV4lTunerChannel *v4lchannel = GST_V4L_TUNER_CHANNEL (channel);
gint norm;
/* assert that we're opened and that we're using a known item */
g_return_if_fail (GST_V4L_IS_OPEN (v4lelement));
g_return_if_fail (gst_v4l_tuner_contains_channel (v4lelement, v4lchannel));
gst_v4l_get_chan_norm (v4lelement, NULL, &norm);
gst_v4l_set_chan_norm (v4lelement, v4lchannel->index, norm);
}
static const GstTunerChannel *
gst_v4l_tuner_get_channel (GstTuner *tuner)
{
GstV4lElement *v4lelement = GST_V4LELEMENT (tuner);
GList *item;
gint channel;
/* assert that we're opened */
g_return_val_if_fail (GST_V4L_IS_OPEN (v4lelement), NULL);
gst_v4l_get_chan_norm (v4lelement, &channel, NULL);
for (item = v4lelement->channels; item != NULL; item = item->next) {
if (channel == GST_V4L_TUNER_CHANNEL (item->data)->index)
return (const GstTunerChannel *) item->data;
}
return NULL;
}
static gboolean
gst_v4l_tuner_contains_norm (GstV4lElement *v4lelement,
GstV4lTunerNorm *v4lnorm)
{
const GList *item;
for (item = v4lelement->norms; item != NULL; item = item->next)
if (item->data == v4lnorm)
return TRUE;
return FALSE;
}
static const GList *
gst_v4l_tuner_list_norms (GstTuner *tuner)
{
return GST_V4LELEMENT (tuner)->norms;
}
static void
gst_v4l_tuner_set_norm (GstTuner *tuner,
GstTunerNorm *norm)
{
GstV4lElement *v4lelement = GST_V4LELEMENT (tuner);
GstV4lTunerNorm *v4lnorm = GST_V4L_TUNER_NORM (norm);
gint channel;
/* assert that we're opened and that we're using a known item */
g_return_if_fail (GST_V4L_IS_OPEN (v4lelement));
g_return_if_fail (gst_v4l_tuner_contains_norm (v4lelement, v4lnorm));
gst_v4l_get_chan_norm (v4lelement, &channel, NULL);
gst_v4l_set_chan_norm (v4lelement, channel, v4lnorm->index);
}
static const GstTunerNorm *
gst_v4l_tuner_get_norm (GstTuner *tuner)
{
GstV4lElement *v4lelement = GST_V4LELEMENT (tuner);
GList *item;
gint norm;
/* assert that we're opened */
g_return_val_if_fail (GST_V4L_IS_OPEN (v4lelement), NULL);
gst_v4l_get_chan_norm (v4lelement, NULL, &norm);
for (item = v4lelement->norms; item != NULL; item = item->next) {
if (norm == GST_V4L_TUNER_NORM (item->data)->index)
return (const GstTunerNorm *) item->data;
}
return NULL;
}
static void
gst_v4l_tuner_set_frequency (GstTuner *tuner,
GstTunerChannel *channel,
gulong frequency)
{
GstV4lElement *v4lelement = GST_V4LELEMENT (tuner);
GstV4lTunerChannel *v4lchannel = GST_V4L_TUNER_CHANNEL(channel);
gint chan;
/* assert that we're opened and that we're using a known item */
g_return_if_fail (GST_V4L_IS_OPEN (v4lelement));
g_return_if_fail (GST_TUNER_CHANNEL_HAS_FLAG (channel,
GST_TUNER_CHANNEL_FREQUENCY));
g_return_if_fail (gst_v4l_tuner_contains_channel (v4lelement, v4lchannel));
gst_v4l_get_chan_norm (v4lelement, &chan, NULL);
if (chan == GST_V4L_TUNER_CHANNEL (channel)->index) {
gst_v4l_set_frequency (v4lelement, v4lchannel->tuner, frequency);
}
}
static gulong
gst_v4l_tuner_get_frequency (GstTuner *tuner,
GstTunerChannel *channel)
{
GstV4lElement *v4lelement = GST_V4LELEMENT (tuner);
GstV4lTunerChannel *v4lchannel = GST_V4L_TUNER_CHANNEL(channel);
gint chan;
gulong frequency = 0;
/* assert that we're opened and that we're using a known item */
g_return_val_if_fail (GST_V4L_IS_OPEN (v4lelement), 0);
g_return_val_if_fail (GST_TUNER_CHANNEL_HAS_FLAG (channel,
GST_TUNER_CHANNEL_FREQUENCY), 0);
g_return_val_if_fail (gst_v4l_tuner_contains_channel (v4lelement,
v4lchannel), 0);
gst_v4l_get_chan_norm (v4lelement, &chan, NULL);
if (chan == GST_V4L_TUNER_CHANNEL (channel)->index) {
gst_v4l_get_frequency (v4lelement, v4lchannel->tuner, &frequency);
}
return frequency;
}
static gint
gst_v4l_tuner_signal_strength (GstTuner *tuner,
GstTunerChannel *channel)
{
GstV4lElement *v4lelement = GST_V4LELEMENT (tuner);
GstV4lTunerChannel *v4lchannel = GST_V4L_TUNER_CHANNEL(channel);
gint chan;
gint signal = 0;
/* assert that we're opened and that we're using a known item */
g_return_val_if_fail (GST_V4L_IS_OPEN (v4lelement), 0);
g_return_val_if_fail (GST_TUNER_CHANNEL_HAS_FLAG (channel,
GST_TUNER_CHANNEL_FREQUENCY), 0);
g_return_val_if_fail (gst_v4l_tuner_contains_channel (v4lelement,
v4lchannel), 0);
gst_v4l_get_chan_norm (v4lelement, &chan, NULL);
if (chan == GST_V4L_TUNER_CHANNEL (channel)->index &&
GST_TUNER_CHANNEL_HAS_FLAG (channel, GST_TUNER_CHANNEL_FREQUENCY)) {
gst_v4l_get_signal (v4lelement, v4lchannel->tuner, &signal);
}
return signal;
}