1 /* GStreamer Mixer

     2  * Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>

     3  *

     4  * mixertrack.h: mixer track object

     5  *

     6  * This library is free software; you can redistribute it and/or

     7  * modify it under the terms of the GNU Library General Public

     8  * License as published by the Free Software Foundation; either

     9  * version 2 of the License, or (at your option) any later version.

    10  *

    11  * This library is distributed in the hope that it will be useful,

    12  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    14  * Library General Public License for more details.

    15  *

    16  * You should have received a copy of the GNU Library General Public

    17  * License along with this library; if not, write to the

    18  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,

    19  * Boston, MA 02111-1307, USA.

    20  */

    21 

    22 #ifndef __GST_MIXER_TRACK_H__

    23 #define __GST_MIXER_TRACK_H__

    24 

    25 #include <gst/gst.h>

    26 

    27 G_BEGIN_DECLS

    28 

    29 #define GST_TYPE_MIXER_TRACK \

    30   (gst_mixer_track_get_type ())

    31 #define GST_MIXER_TRACK(obj) \

    32   (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_MIXER_TRACK, \

    33                                GstMixerTrack))

    34 #define GST_MIXER_TRACK_CLASS(klass) \

    35   (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_MIXER_TRACK, \

    36                             GstMixerTrackClass))

    37 #define GST_IS_MIXER_TRACK(obj) \

    38   (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_MIXER_TRACK))

    39 #define GST_IS_MIXER_TRACK_CLASS(klass) \

    40   (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_MIXER_TRACK))

    41 

    42 /*

    43  * Naming:

    44  *

    45  * A track is a single input/output stream (e.g. line-in,

    46  * microphone, etc.). Channels are then single streams

    47  * within a track. A mono stream has one channel, a stereo

    48  * stream has two, etc.

    49  *

    50  * Input tracks can have 'recording' enabled, which means

    51  * that any input will be hearable into the speakers that

    52  * are attached to the output. Mute is obvious. A track

    53  * flagged as master is the master volume track on this

    54  * mixer, which means that setting this track will change

    55  * the hearable volume on any output.

    56  */

    57 

    58 typedef enum {

    59   GST_MIXER_TRACK_INPUT  = (1<<0),

    60   GST_MIXER_TRACK_OUTPUT = (1<<1),

    61   GST_MIXER_TRACK_MUTE   = (1<<2),

    62   GST_MIXER_TRACK_RECORD = (1<<3),

    63   GST_MIXER_TRACK_MASTER = (1<<4),

    64   GST_MIXER_TRACK_SOFTWARE = (1<<5)

    65 } GstMixerTrackFlags;

    66 

    67 #define GST_MIXER_TRACK_HAS_FLAG(channel, flag) \

    68   ((channel)->flags & flag)

    69 

    70 typedef struct _GstMixerTrack GstMixerTrack;

    71 typedef struct _GstMixerTrackClass GstMixerTrackClass;

    72 

    73 struct _GstMixerTrack {

    74   GObject            parent;

    75 

    76   gchar             *label;

    77 

    78   /* FIXME 0.11: flags should be guint32 */

    79   GstMixerTrackFlags flags;

    80 

    81   gint               num_channels;

    82   gint               min_volume;

    83   gint               max_volume;

    84 

    85   /* FIXME 0.11: add padding */

    86 };

    87 

    88 struct _GstMixerTrackClass {

    89   GObjectClass parent;

    90 

    91 #ifdef GST_MIXER_NEED_DEPRECATED

    92   /* signals (deprecated) */

    93   void (* mute_toggled)   (GstMixerTrack *channel,

    94                            gboolean       mute);

    95   void (* record_toggled) (GstMixerTrack *channel,

    96                            gboolean       record);

    97   void (* volume_changed) (GstMixerTrack *channel,

    98                            gint          *volumes);

    99 #endif /* GST_MIXER_NEED_DEPRECATED */

   100 

   101   gpointer _gst_reserved[GST_PADDING];

   102 };

   103 #ifdef __SYMBIAN32__

   104 IMPORT_C

   105 #endif

   106 

   107 

   108 GType           gst_mixer_track_get_type        (void);

   109 

   110 G_END_DECLS

   111 

   112 #endif /* __GST_MIXER_TRACK_H__ */