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116 lines
3.7 KiB
C
116 lines
3.7 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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* tunerchannel.h: tuner channel object design
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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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#ifndef __GST_TUNER_CHANNEL_H__
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#define __GST_TUNER_CHANNEL_H__
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#include <gst/gst.h>
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G_BEGIN_DECLS
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#define GST_TYPE_TUNER_CHANNEL \
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(gst_tuner_channel_get_type ())
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#define GST_TUNER_CHANNEL(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_TUNER_CHANNEL, \
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GstTunerChannel))
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#define GST_TUNER_CHANNEL_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_TUNER_CHANNEL, \
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GstTunerChannelClass))
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#define GST_IS_TUNER_CHANNEL(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_TUNER_CHANNEL))
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#define GST_IS_TUNER_CHANNEL_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_TUNER_CHANNEL))
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typedef struct _GstTunerChannel GstTunerChannel;
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typedef struct _GstTunerChannelClass GstTunerChannelClass;
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/**
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* GstTunerChannelFlags:
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* @GST_TUNER_CHANNEL_INPUT: The channel is for input
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* @GST_TUNER_CHANNEL_OUTPUT: The channel is for output
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* @GST_TUNER_CHANNEL_FREQUENCY: The channel has a frequency setting
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* and signal strength.
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* @GST_TUNER_CHANNEL_AUDIO: The channel carries audio.
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*
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* An enumeration for flags indicating the available capabilities
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* of a #GstTunerChannel.
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*/
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typedef enum {
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GST_TUNER_CHANNEL_INPUT = (1<<0),
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GST_TUNER_CHANNEL_OUTPUT = (1<<1),
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GST_TUNER_CHANNEL_FREQUENCY = (1<<2),
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GST_TUNER_CHANNEL_AUDIO = (1<<3)
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} GstTunerChannelFlags;
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/**
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* GST_TUNER_CHANNEL_HAS_FLAG:
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* @channel: A #GstTunerChannel
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* @flag: The flag to check for
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*
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* Macro to check if the given flag is set on a channel
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*/
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#define GST_TUNER_CHANNEL_HAS_FLAG(channel, flag) \
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((channel)->flags & flag)
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/**
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* GstTunerChannel:
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* @label: A string containing a descriptive name for this channel
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* @flags: A set of #GstTunerChannelFlags for this channel
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* @freq_multiplicator: The step size (in Hz) for the frequency setting.
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* @min_frequency: Minimum valid frequency setting (in Hz).
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* @max_frequency: Maximum valid frequency setting (in Hz).
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* @min_signal: Minimum reported signal strength value.
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* @max_signal: Maximum reported signal strength value.
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*/
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struct _GstTunerChannel {
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GObject parent;
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/*< public >*/
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gchar *label;
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GstTunerChannelFlags flags;
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gfloat freq_multiplicator;
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gulong min_frequency;
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gulong max_frequency;
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gint min_signal;
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gint max_signal;
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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};
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struct _GstTunerChannelClass {
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GObjectClass parent;
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/*< private >*/
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/* signals */
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void (*frequency_changed) (GstTunerChannel *channel,
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gulong frequency);
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void (*signal_changed) (GstTunerChannel *channel,
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gint signal);
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gpointer _gst_reserved[GST_PADDING];
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};
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GType gst_tuner_channel_get_type (void);
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G_END_DECLS
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#endif /* __GST_TUNER_CHANNEL_H__ */
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