gstreamer/gst-libs/gst/interfaces/mixer.h

/* 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>
#include <gst/interfaces/mixeroptions.h>
#include <gst/interfaces/mixertrack.h>
#include <gst/interfaces/interfaces-enumtypes.h>

G_BEGIN_DECLS

#define GST_TYPE_MIXER \
  (gst_mixer_get_type ())
#define GST_MIXER(obj) \
  (GST_IMPLEMENTS_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_IMPLEMENTS_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))

#define GST_MIXER_TYPE(klass) (klass->mixer_type)

typedef struct _GstMixer GstMixer;
typedef struct _GstMixerClass GstMixerClass;

typedef enum
{
  GST_MIXER_HARDWARE,
  GST_MIXER_SOFTWARE
} GstMixerType;

struct _GstMixerClass {
  GTypeInterface klass;

  GstMixerType mixer_type;
  
  /* virtual functions */
  const GList *  (* list_tracks)   (GstMixer      *mixer);

  void           (* set_volume)    (GstMixer      *mixer,
                                    GstMixerTrack *track,
                                    gint          *volumes);
  void           (* get_volume)    (GstMixer      *mixer,
                                    GstMixerTrack *track,
                                    gint          *volumes);

  void           (* set_mute)      (GstMixer      *mixer,
                                    GstMixerTrack *track,
                                    gboolean       mute);
  void           (* set_record)    (GstMixer      *mixer,
                                    GstMixerTrack *track,
                                    gboolean       record);

  /* signals */
  void (* mute_toggled)   (GstMixer      *mixer,
                           GstMixerTrack *channel,
                           gboolean       mute);
  void (* record_toggled) (GstMixer      *mixer,
                           GstMixerTrack *channel,
                           gboolean       record);
  void (* volume_changed) (GstMixer      *mixer,
                           GstMixerTrack *channel,
                           gint          *volumes);

  void          (* set_option)     (GstMixer      *mixer,
                                    GstMixerOptions *opts,
                                    gchar         *value);
  const gchar * (* get_option)     (GstMixer      *mixer,
                                    GstMixerOptions *opts);

  void (* option_changed) (GstMixer      *mixer,
                           GstMixerOptions *opts,
                           gchar         *option);

  /*< private >*/
  gpointer _gst_reserved[GST_PADDING];
};

GType           gst_mixer_get_type      (void);

/* virtual class function wrappers */
const GList *   gst_mixer_list_tracks    (GstMixer      *mixer);
void            gst_mixer_set_volume     (GstMixer      *mixer,
                                          GstMixerTrack *track,
                                          gint          *volumes);
void            gst_mixer_get_volume     (GstMixer      *mixer,
                                          GstMixerTrack *track,
                                          gint          *volumes);
void            gst_mixer_set_mute       (GstMixer      *mixer,
                                          GstMixerTrack *track,
                                          gboolean       mute);
void            gst_mixer_set_record     (GstMixer      *mixer,
                                          GstMixerTrack *track,
                                          gboolean       record);
void            gst_mixer_set_option     (GstMixer      *mixer,
                                          GstMixerOptions *opts,
                                          gchar         *value);
const gchar *   gst_mixer_get_option     (GstMixer      *mixer,
                                          GstMixerOptions *opts);

/* trigger signals */
void            gst_mixer_mute_toggled   (GstMixer      *mixer,
                                          GstMixerTrack *track,
                                          gboolean       mute);
void            gst_mixer_record_toggled (GstMixer      *mixer,
                                          GstMixerTrack *track,
                                          gboolean       record);
void            gst_mixer_volume_changed (GstMixer      *mixer,
                                          GstMixerTrack *track,
                                          gint          *volumes);
void            gst_mixer_option_changed (GstMixer      *mixer,
                                          GstMixerOptions *opts,
                                          gchar         *value);

G_END_DECLS

#endif /* __GST_MIXER_H__ */