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7c1c3a173f
Original commit message from CVS: 2004-01-25 Ronald Bultje <rbultje@ronald.bitfreak.net> * gst-libs/gst/mixer/mixer.c: * gst-libs/gst/propertyprobe/propertyprobe.c: * gst-libs/gst/tuner/tuner.c: (gst_tuner_find_norm_by_name), (gst_tuner_find_channel_by_name): * gst-libs/gst/tuner/tuner.h: Add gtk-doc style comments. Also fix a function name.
425 lines
10 KiB
C
425 lines
10 KiB
C
/* GStreamer Tuner
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* Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
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*
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* tuner.c: tuner design virtual class function wrappers
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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 "tuner.h"
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#include "tunermarshal.h"
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#include <string.h>
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enum {
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NORM_CHANGED,
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CHANNEL_CHANGED,
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FREQUENCY_CHANGED,
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SIGNAL_CHANGED,
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LAST_SIGNAL
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};
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static void gst_tuner_class_init (GstTunerClass *klass);
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static guint gst_tuner_signals[LAST_SIGNAL] = { 0 };
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GType
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gst_tuner_get_type (void)
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{
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static GType gst_tuner_type = 0;
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if (!gst_tuner_type) {
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static const GTypeInfo gst_tuner_info = {
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sizeof (GstTunerClass),
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(GBaseInitFunc) gst_tuner_class_init,
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NULL,
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NULL,
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NULL,
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NULL,
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0,
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0,
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NULL,
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};
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gst_tuner_type = g_type_register_static (G_TYPE_INTERFACE,
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"GstTuner",
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&gst_tuner_info, 0);
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g_type_interface_add_prerequisite (gst_tuner_type,
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GST_TYPE_IMPLEMENTS_INTERFACE);
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}
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return gst_tuner_type;
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}
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static void
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gst_tuner_class_init (GstTunerClass *klass)
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{
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static gboolean initialized = FALSE;
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if (!initialized) {
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gst_tuner_signals[NORM_CHANGED] =
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g_signal_new ("norm_changed",
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GST_TYPE_TUNER, G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstTunerClass, norm_changed),
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NULL, NULL,
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g_cclosure_marshal_VOID__OBJECT, G_TYPE_NONE, 1,
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GST_TYPE_TUNER_NORM);
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gst_tuner_signals[CHANNEL_CHANGED] =
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g_signal_new ("channel_changed",
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GST_TYPE_TUNER, G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstTunerClass, channel_changed),
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NULL, NULL,
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g_cclosure_marshal_VOID__OBJECT, G_TYPE_NONE, 1,
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GST_TYPE_TUNER_CHANNEL);
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gst_tuner_signals[FREQUENCY_CHANGED] =
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g_signal_new ("frequency_changed",
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GST_TYPE_TUNER, G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstTunerClass, frequency_changed),
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NULL, NULL,
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gst_tuner_marshal_VOID__OBJECT_ULONG, G_TYPE_NONE, 2,
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GST_TYPE_TUNER_CHANNEL, G_TYPE_ULONG);
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gst_tuner_signals[SIGNAL_CHANGED] =
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g_signal_new ("signal_changed",
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GST_TYPE_TUNER, G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstTunerClass, signal_changed),
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NULL, NULL,
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gst_tuner_marshal_VOID__OBJECT_INT, G_TYPE_NONE, 2,
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GST_TYPE_TUNER_CHANNEL, G_TYPE_INT);
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initialized = TRUE;
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}
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/* default virtual functions */
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klass->list_channels = NULL;
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klass->set_channel = NULL;
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klass->get_channel = NULL;
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klass->list_norms = NULL;
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klass->set_norm = NULL;
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klass->get_norm = NULL;
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klass->set_frequency = NULL;
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klass->get_frequency = NULL;
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klass->signal_strength = NULL;
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}
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/**
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* gst_tuner_list_channels:
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* @tuner: the #GstTuner (a #GstElement) to get the channels from.
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*
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* Retrieve a list of channels (e.g. 'composite', 's-video', ...)
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* from the given tuner object.
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*
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* Returns: a list of channels available on this tuner.
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*/
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const GList *
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gst_tuner_list_channels (GstTuner *tuner)
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{
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GstTunerClass *klass = GST_TUNER_GET_CLASS (tuner);
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if (klass->list_channels) {
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return klass->list_channels (tuner);
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}
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return NULL;
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}
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/**
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* gst_tuner_set_channel:
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* @tuner: the #GstTuner (a #GstElement) that owns the channel.
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* @channel: the channel to tune to.
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*
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* Tunes the object to the given channel.
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*/
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void
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gst_tuner_set_channel (GstTuner *tuner,
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GstTunerChannel *channel)
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{
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GstTunerClass *klass = GST_TUNER_GET_CLASS (tuner);
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if (klass->set_channel) {
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klass->set_channel (tuner, channel);
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}
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}
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/**
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* gst_Tuner_get_channel:
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* @tuner: the #GstTuner (a #GstElement) to get the current channel from.
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*
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* Retrieve the current channel from the tuner.
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*
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* Returns: the current channel of the tuner object.
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*/
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GstTunerChannel *
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gst_tuner_get_channel (GstTuner *tuner)
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{
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GstTunerClass *klass = GST_TUNER_GET_CLASS (tuner);
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if (klass->get_channel) {
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return klass->get_channel (tuner);
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}
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return NULL;
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}
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/**
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* gst_tuner_get_norms_list:
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* @tuner: the #GstTuner (*a #GstElement) to get the list of norms from.
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*
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* Retrieve a list of available norms on the currently tuned channel
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* from the given tuner object.
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*
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* Returns: A list of norms available on the current channel for this
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* tuner object.
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*/
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const GList *
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gst_tuner_list_norms (GstTuner *tuner)
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{
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GstTunerClass *klass = GST_TUNER_GET_CLASS (tuner);
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if (klass->list_norms) {
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return klass->list_norms (tuner);
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}
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return NULL;
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}
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/**
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* gst_tuner_set_norm:
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* @tuner: the #GstTuner (a #GstElement) to set the norm on.
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* @norm: the norm to use for the current channel.
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*
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* Changes the video norm on this tuner to the given norm.
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*/
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void
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gst_tuner_set_norm (GstTuner *tuner,
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GstTunerNorm *norm)
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{
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GstTunerClass *klass = GST_TUNER_GET_CLASS (tuner);
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if (klass->set_norm) {
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klass->set_norm (tuner, norm);
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}
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}
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/**
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* gst_tuner_get_norm:
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* @tuner: the #GstTuner (a #GstElement) to get the current norm from.
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*
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* Get the current video norm from the given tuner object for the
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* currently selected channel.
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*
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* Returns: the current norm.
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*/
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GstTunerNorm *
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gst_tuner_get_norm (GstTuner *tuner)
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{
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GstTunerClass *klass = GST_TUNER_GET_CLASS (tuner);
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if (klass->get_norm) {
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return klass->get_norm (tuner);
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}
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return NULL;
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}
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/**
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* gst_tuner_set_frequency:
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* @tuner: the #Gsttuner (a #GstElement) that owns the given channel.
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* @channel: the #GstTunerChannel to set the frequency on.
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* @frequency: the frequency to tune in to.
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*
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* Sets a tuning frequency on the given tuner/channel. Note that this
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* requires the given channel to be a "tuning" channel, which can be
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* checked using GST_TUNER_CHANNEL_HAS_FLAG (), with the proper flag
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* being GST_TUNER_CHANNEL_FREQUENCY.
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*/
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void
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gst_tuner_set_frequency (GstTuner *tuner,
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GstTunerChannel *channel,
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gulong frequency)
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{
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GstTunerClass *klass = GST_TUNER_GET_CLASS (tuner);
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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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if (klass->set_frequency) {
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klass->set_frequency (tuner, channel, frequency);
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}
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}
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/**
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* gst_tuner_get_frequency:
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* @tuner: the #GstTuner (a #GstElement) that owns the given channel.
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* @channel: the #GstTunerChannel to retrieve the frequency from.
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*
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* Retrieve the current frequency from the given channel. The same
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* applies as for set_frequency (): check the flag.
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*
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* Returns: the current frequency, or 0 on error.
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*/
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gulong
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gst_tuner_get_frequency (GstTuner *tuner,
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GstTunerChannel *channel)
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{
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GstTunerClass *klass = GST_TUNER_GET_CLASS (tuner);
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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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if (klass->get_frequency) {
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return klass->get_frequency (tuner, channel);
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}
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return 0;
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}
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/**
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* gst_tuner_get_signal_strength:
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* @tuner: the #GstTuner (a #GstElement) that owns the given channel.
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* @channel: the #GstTunerChannel to get the signal strength from.
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*
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* get the strength of the signal on this channel. Note that this
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* requires the current channel to be a "tuning" channel, e.g. a
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* channel on which frequency can be set. This can be checked using
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* GST_TUNER_CHANNEL_HAS_FLAG (), and the appropriate flag to check
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* for is GST_TUNER_CHANNEL_FREQUENCY.
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*
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* Returns: signal strength, or 0 on error.
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*/
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gint
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gst_tuner_signal_strength (GstTuner *tuner,
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GstTunerChannel *channel)
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{
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GstTunerClass *klass = GST_TUNER_GET_CLASS (tuner);
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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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if (klass->signal_strength) {
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return klass->signal_strength (tuner, channel);
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}
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return 0;
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}
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GstTunerNorm *
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gst_tuner_find_norm_by_name (GstTuner *tuner,
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gchar *norm)
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{
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GList *walk;
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g_return_val_if_fail (GST_TUNER (tuner), NULL);
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g_return_val_if_fail (norm != NULL, NULL);
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walk = (GList *) gst_tuner_list_norms (tuner);
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while (walk) {
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if (strcmp (GST_TUNER_NORM (walk->data)->label, norm) == 0)
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return GST_TUNER_NORM (walk->data);
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walk = g_list_next (walk);
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}
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return NULL;
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}
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GstTunerChannel *
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gst_tuner_find_channel_by_name (GstTuner *tuner,
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gchar *channel)
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{
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GList *walk;
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g_return_val_if_fail (GST_TUNER (tuner), NULL);
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g_return_val_if_fail (channel != NULL, NULL);
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walk = (GList *) gst_tuner_list_channels (tuner);
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while (walk) {
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if (strcmp (GST_TUNER_CHANNEL (walk->data)->label, channel) == 0)
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return GST_TUNER_CHANNEL (walk->data);
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walk = g_list_next (walk);
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}
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return NULL;
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}
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void
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gst_tuner_channel_changed (GstTuner *tuner,
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GstTunerChannel *channel)
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{
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g_return_if_fail (GST_IS_TUNER (tuner));
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g_return_if_fail (GST_IS_TUNER_CHANNEL (channel));
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g_signal_emit (G_OBJECT (tuner),
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gst_tuner_signals[CHANNEL_CHANGED], 0,
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channel);
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}
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void
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gst_tuner_norm_changed (GstTuner *tuner,
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GstTunerNorm *norm)
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{
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g_return_if_fail (GST_IS_TUNER (tuner));
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g_return_if_fail (GST_IS_TUNER_NORM (norm));
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g_signal_emit (G_OBJECT (tuner),
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gst_tuner_signals[NORM_CHANGED], 0,
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norm);
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}
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void
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gst_tuner_frequency_changed (GstTuner *tuner,
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GstTunerChannel *channel,
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gulong frequency)
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{
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g_return_if_fail (GST_IS_TUNER (tuner));
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g_return_if_fail (GST_IS_TUNER_CHANNEL (channel));
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g_signal_emit (G_OBJECT (tuner),
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gst_tuner_signals[FREQUENCY_CHANGED], 0,
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channel, frequency);
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g_signal_emit_by_name (G_OBJECT (channel),
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"frequency_changed",
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frequency);
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}
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void
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gst_tuner_signal_changed (GstTuner *tuner,
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GstTunerChannel *channel,
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gint signal)
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{
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g_return_if_fail (GST_IS_TUNER (tuner));
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g_return_if_fail (GST_IS_TUNER_CHANNEL (channel));
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g_signal_emit (G_OBJECT (tuner),
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gst_tuner_signals[SIGNAL_CHANGED], 0,
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channel, signal);
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g_signal_emit_by_name (G_OBJECT (channel),
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"signal_changed",
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signal);
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}
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