mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-23 00:36:51 +00:00
0f124a569d
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!
341 lines
9.6 KiB
C
341 lines
9.6 KiB
C
/* 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;
|
|
}
|