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/* GStreamer Mixer
* Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
*
* mixer.h: mixer interface design
*
* 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.
*/
#ifndef __GST_MIXER_H__
#define __GST_MIXER_H__
#include <gst/gst.h>
G_BEGIN_DECLS
#define GST_TYPE_MIXER \
(gst_mixer_get_type ())
#define GST_MIXER(obj) \
(GST_INTERFACE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_MIXER, GstMixer))
#define GST_MIXER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_MIXER, GstMixerClass))
#define GST_IS_MIXER(obj) \
(GST_INTERFACE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_MIXER))
#define GST_IS_MIXER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_MIXER))
#define GST_MIXER_GET_CLASS(inst) \
(G_TYPE_INSTANCE_GET_INTERFACE ((inst), GST_TYPE_MIXER, GstMixerClass))
/* I fully realise that this naming being used here is confusing.
* A channel is referred to both as the number of simultaneous
* sound streams the input can handle as well as the in-/output
* itself. We need to fix this some day, I just cannot come up
* with something better.
*/
#define GST_MIXER_CHANNEL_INPUT (1<<0)
#define GST_MIXER_CHANNEL_OUTPUT (1<<1)
#define GST_MIXER_CHANNEL_MUTE (1<<2)
#define GST_MIXER_CHANNEL_RECORD (1<<3)
typedef struct _GstMixerChannel {
gchar *label;
gint num_channels,
flags,
min_volume, max_volume;
} GstMixerChannel;
#define GST_MIXER_CHANNEL_HAS_FLAG(channel, flag) \
((channel)->flags & flag)
typedef struct _GstMixer GstMixer;
typedef struct _GstMixerClass {
GTypeInterface klass;
/* virtual functions */
const GList * (* list_channels) (GstMixer *mixer);
void (* set_volume) (GstMixer *mixer,
GstMixerChannel *channel,
gint *volumes);
void (* get_volume) (GstMixer *mixer,
GstMixerChannel *channel,
gint *volumes);
void (* set_mute) (GstMixer *mixer,
GstMixerChannel *channel,
gboolean mute);
void (* set_record) (GstMixer *mixer,
GstMixerChannel *channel,
gboolean record);
GST_CLASS_PADDING
} GstMixerClass;
GType gst_mixer_get_type (void);
/* virtual class function wrappers */
const GList * gst_mixer_list_channels (GstMixer *mixer);
void gst_mixer_set_volume (GstMixer *mixer,
GstMixerChannel *channel,
gint *volumes);
void gst_mixer_get_volume (GstMixer *mixer,
GstMixerChannel *channel,
gint *volumes);
void gst_mixer_set_mute (GstMixer *mixer,
GstMixerChannel *channel,
gboolean mute);
void gst_mixer_set_record (GstMixer *mixer,
GstMixerChannel *channel,
gboolean record);
G_END_DECLS
#endif /* __GST_MIXER_H__ */
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