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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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862d28a1b7
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!
361 lines
10 KiB
C
361 lines
10 KiB
C
/* GStreamer Tuner interface implementation
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* Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
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*
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* gstv4l2tuner.c: tuner interface implementation for V4L2
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#include <gst/tuner/tuner.h>
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#include "gstv4l2tuner.h"
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#include "gstv4l2element.h"
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#include "v4l2_calls.h"
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static void gst_v4l2_tuner_channel_class_init (GstV4l2TunerChannelClass *klass);
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static void gst_v4l2_tuner_channel_init (GstV4l2TunerChannel *channel);
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static void gst_v4l2_tuner_norm_class_init (GstV4l2TunerNormClass *klass);
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static void gst_v4l2_tuner_norm_init (GstV4l2TunerNorm *norm);
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static const GList *
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gst_v4l2_tuner_list_channels (GstTuner *mixer);
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static void gst_v4l2_tuner_set_channel (GstTuner *mixer,
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GstTunerChannel *channel);
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static const GstTunerChannel *
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gst_v4l2_tuner_get_channel (GstTuner *mixer);
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static const GList *
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gst_v4l2_tuner_list_norms (GstTuner *mixer);
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static void gst_v4l2_tuner_set_norm (GstTuner *mixer,
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GstTunerNorm *norm);
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static const GstTunerNorm *
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gst_v4l2_tuner_get_norm (GstTuner *mixer);
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static void gst_v4l2_tuner_set_frequency (GstTuner *mixer,
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GstTunerChannel *channel,
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gulong frequency);
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static gulong gst_v4l2_tuner_get_frequency (GstTuner *mixer,
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GstTunerChannel *channel);
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static gint gst_v4l2_tuner_signal_strength (GstTuner *mixer,
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GstTunerChannel *channel);
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static GstTunerNormClass *norm_parent_class = NULL;
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static GstTunerChannelClass *channel_parent_class = NULL;
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GType
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gst_v4l2_tuner_channel_get_type (void)
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{
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static GType gst_v4l2_tuner_channel_type = 0;
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if (!gst_v4l2_tuner_channel_type) {
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static const GTypeInfo v4l2_tuner_channel_info = {
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sizeof (GstV4l2TunerChannelClass),
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NULL,
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NULL,
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(GClassInitFunc) gst_v4l2_tuner_channel_class_init,
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NULL,
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NULL,
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sizeof (GstV4l2TunerChannel),
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0,
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(GInstanceInitFunc) gst_v4l2_tuner_channel_init,
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NULL
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};
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gst_v4l2_tuner_channel_type =
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g_type_register_static (GST_TYPE_TUNER_CHANNEL,
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"GstV4l2TunerChannel",
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&v4l2_tuner_channel_info, 0);
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}
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return gst_v4l2_tuner_channel_type;
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}
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static void
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gst_v4l2_tuner_channel_class_init (GstV4l2TunerChannelClass *klass)
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{
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channel_parent_class = g_type_class_ref (GST_TYPE_TUNER_CHANNEL);
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}
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static void
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gst_v4l2_tuner_channel_init (GstV4l2TunerChannel *channel)
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{
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channel->index = 0;
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channel->tuner = 0;
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channel->audio = 0;
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}
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GType
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gst_v4l2_tuner_norm_get_type (void)
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{
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static GType gst_v4l2_tuner_norm_type = 0;
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if (!gst_v4l2_tuner_norm_type) {
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static const GTypeInfo v4l2_tuner_norm_info = {
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sizeof (GstV4l2TunerNormClass),
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NULL,
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NULL,
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(GClassInitFunc) gst_v4l2_tuner_norm_class_init,
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NULL,
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NULL,
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sizeof (GstV4l2TunerNorm),
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0,
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(GInstanceInitFunc) gst_v4l2_tuner_norm_init,
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NULL
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};
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gst_v4l2_tuner_norm_type =
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g_type_register_static (GST_TYPE_TUNER_NORM,
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"GstV4l2TunerNorm",
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&v4l2_tuner_norm_info, 0);
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}
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return gst_v4l2_tuner_norm_type;
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}
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static void
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gst_v4l2_tuner_norm_class_init (GstV4l2TunerNormClass *klass)
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{
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norm_parent_class = g_type_class_ref (GST_TYPE_TUNER_NORM);
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}
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static void
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gst_v4l2_tuner_norm_init (GstV4l2TunerNorm *norm)
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{
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norm->index = 0;
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}
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void
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gst_v4l2_tuner_interface_init (GstTunerClass *klass)
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{
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/* default virtual functions */
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klass->list_channels = gst_v4l2_tuner_list_channels;
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klass->set_channel = gst_v4l2_tuner_set_channel;
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klass->get_channel = gst_v4l2_tuner_get_channel;
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klass->list_norms = gst_v4l2_tuner_list_norms;
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klass->set_norm = gst_v4l2_tuner_set_norm;
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klass->get_norm = gst_v4l2_tuner_get_norm;
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klass->set_frequency = gst_v4l2_tuner_set_frequency;
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klass->get_frequency = gst_v4l2_tuner_get_frequency;
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klass->signal_strength = gst_v4l2_tuner_signal_strength;
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}
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static gboolean
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gst_v4l2_tuner_is_sink (GstV4l2Element *v4l2element)
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{
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const GList *pads = gst_element_get_pad_list (GST_ELEMENT (v4l2element));
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GstPadDirection dir = GST_PAD_UNKNOWN;
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/* get direction */
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if (pads && g_list_length ((GList *) pads) == 1)
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dir = GST_PAD_DIRECTION (GST_PAD (pads->data));
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return (dir == GST_PAD_SINK);
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}
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static gboolean
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gst_v4l2_tuner_contains_channel (GstV4l2Element *v4l2element,
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GstV4l2TunerChannel *v4l2channel)
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{
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const GList *item;
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for (item = v4l2element->channels; item != NULL; item = item->next)
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if (item->data == v4l2channel)
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return TRUE;
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return FALSE;
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}
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static const GList *
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gst_v4l2_tuner_list_channels (GstTuner *mixer)
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{
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/* ... or output, if we're a sink... */
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return GST_V4L2ELEMENT (mixer)->channels;
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}
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static void
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gst_v4l2_tuner_set_channel (GstTuner *mixer,
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GstTunerChannel *channel)
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{
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GstV4l2Element *v4l2element = GST_V4L2ELEMENT (mixer);
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GstV4l2TunerChannel *v4l2channel = GST_V4L2_TUNER_CHANNEL (channel);
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/* assert that we're opened and that we're using a known item */
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g_return_if_fail (GST_V4L2_IS_OPEN (v4l2element));
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g_return_if_fail (gst_v4l2_tuner_contains_channel (v4l2element, v4l2channel));
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/* ... or output, if we're a sink... */
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if (gst_v4l2_tuner_is_sink (v4l2element))
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gst_v4l2_set_output (v4l2element, v4l2channel->index);
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else
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gst_v4l2_set_input (v4l2element, v4l2channel->index);
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}
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static const GstTunerChannel *
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gst_v4l2_tuner_get_channel (GstTuner *mixer)
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{
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GstV4l2Element *v4l2element = GST_V4L2ELEMENT (mixer);
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GList *item;
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gint channel;
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/* assert that we're opened and that we're using a known item */
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g_return_val_if_fail (GST_V4L2_IS_OPEN (v4l2element), NULL);
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/* ... or output, if we're a sink... */
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if (gst_v4l2_tuner_is_sink (v4l2element))
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gst_v4l2_get_output (v4l2element, &channel);
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else
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gst_v4l2_get_input (v4l2element, &channel);
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for (item = v4l2element->channels; item != NULL; item = item->next) {
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if (channel == GST_V4L2_TUNER_CHANNEL (item->data)->index)
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return (const GstTunerChannel *) item->data;
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}
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return NULL;
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}
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static gboolean
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gst_v4l2_tuner_contains_norm (GstV4l2Element *v4l2element,
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GstV4l2TunerNorm *v4l2norm)
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{
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const GList *item;
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for (item = v4l2element->norms; item != NULL; item = item->next)
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if (item->data == v4l2norm)
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return TRUE;
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return FALSE;
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}
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static const GList *
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gst_v4l2_tuner_list_norms (GstTuner *mixer)
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{
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return GST_V4L2ELEMENT (mixer)->norms;
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}
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static void
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gst_v4l2_tuner_set_norm (GstTuner *mixer,
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GstTunerNorm *norm)
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{
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GstV4l2Element *v4l2element = GST_V4L2ELEMENT (mixer);
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GstV4l2TunerNorm *v4l2norm = GST_V4L2_TUNER_NORM (norm);
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/* assert that we're opened and that we're using a known item */
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g_return_if_fail (GST_V4L2_IS_OPEN (v4l2element));
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g_return_if_fail (gst_v4l2_tuner_contains_norm (v4l2element, v4l2norm));
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gst_v4l2_set_norm (v4l2element, v4l2norm->index);
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}
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static const GstTunerNorm *
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gst_v4l2_tuner_get_norm (GstTuner *mixer)
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{
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GstV4l2Element *v4l2element = GST_V4L2ELEMENT (mixer);
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GList *item;
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v4l2_std_id norm;
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/* assert that we're opened and that we're using a known item */
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g_return_val_if_fail (GST_V4L2_IS_OPEN (v4l2element), NULL);
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gst_v4l2_get_norm (v4l2element, &norm);
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for (item = v4l2element->norms; item != NULL; item = item->next) {
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if (norm == GST_V4L2_TUNER_NORM (item->data)->index)
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return (const GstTunerNorm *) item->data;
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}
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return NULL;
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}
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static void
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gst_v4l2_tuner_set_frequency (GstTuner *mixer,
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GstTunerChannel *channel,
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gulong frequency)
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{
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GstV4l2Element *v4l2element = GST_V4L2ELEMENT (mixer);
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GstV4l2TunerChannel *v4l2channel = GST_V4L2_TUNER_CHANNEL (channel);
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gint chan;
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/* assert that we're opened and that we're using a known item */
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g_return_if_fail (GST_V4L2_IS_OPEN (v4l2element));
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g_return_if_fail (GST_TUNER_CHANNEL_HAS_FLAG (channel,
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GST_TUNER_CHANNEL_FREQUENCY));
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g_return_if_fail (gst_v4l2_tuner_contains_channel (v4l2element, v4l2channel));
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gst_v4l2_get_input (v4l2element, &chan);
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if (chan == GST_V4L2_TUNER_CHANNEL (channel)->index &&
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GST_TUNER_CHANNEL_HAS_FLAG (channel, GST_TUNER_CHANNEL_FREQUENCY)) {
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gst_v4l2_set_frequency (v4l2element, v4l2channel->tuner, frequency);
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}
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}
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static gulong
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gst_v4l2_tuner_get_frequency (GstTuner *mixer,
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GstTunerChannel *channel)
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{
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GstV4l2Element *v4l2element = GST_V4L2ELEMENT (mixer);
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GstV4l2TunerChannel *v4l2channel = GST_V4L2_TUNER_CHANNEL (channel);
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gint chan;
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gulong frequency = 0;
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/* assert that we're opened and that we're using a known item */
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g_return_val_if_fail (GST_V4L2_IS_OPEN (v4l2element), 0);
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g_return_val_if_fail (GST_TUNER_CHANNEL_HAS_FLAG (channel,
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GST_TUNER_CHANNEL_FREQUENCY), 0);
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g_return_val_if_fail (gst_v4l2_tuner_contains_channel (v4l2element,
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v4l2channel), 0);
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gst_v4l2_get_input (v4l2element, &chan);
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if (chan == GST_V4L2_TUNER_CHANNEL (channel)->index &&
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GST_TUNER_CHANNEL_HAS_FLAG (channel, GST_TUNER_CHANNEL_FREQUENCY)) {
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gst_v4l2_get_frequency (v4l2element, v4l2channel->tuner, &frequency);
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}
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return frequency;
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}
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static gint
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gst_v4l2_tuner_signal_strength (GstTuner *mixer,
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GstTunerChannel *channel)
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{
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GstV4l2Element *v4l2element = GST_V4L2ELEMENT (mixer);
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GstV4l2TunerChannel *v4l2channel = GST_V4L2_TUNER_CHANNEL (channel);
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gint chan;
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gulong signal = 0;
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/* assert that we're opened and that we're using a known item */
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g_return_val_if_fail (GST_V4L2_IS_OPEN (v4l2element), 0);
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g_return_val_if_fail (GST_TUNER_CHANNEL_HAS_FLAG (channel,
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GST_TUNER_CHANNEL_FREQUENCY), 0);
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g_return_val_if_fail (gst_v4l2_tuner_contains_channel (v4l2element,
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v4l2channel), 0);
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gst_v4l2_get_input (v4l2element, &chan);
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if (chan == GST_V4L2_TUNER_CHANNEL (channel)->index &&
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GST_TUNER_CHANNEL_HAS_FLAG (channel, GST_TUNER_CHANNEL_FREQUENCY)) {
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gst_v4l2_signal_strength (v4l2element, v4l2channel->tuner, &signal);
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}
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return signal;
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}
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