1 /* ALSA mixer track object.

     2  * Copyright (C) 2003 Leif Johnson <leif@ambient.2y.net>

     3  *

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

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

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

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

     8  *

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

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

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

    12  * Library General Public License for more details.

    13  *

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

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

    16  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

    17  */

    18 

    19 

    20 #ifndef __GST_ALSA_MIXER_TRACK_H__

    21 #define __GST_ALSA_MIXER_TRACK_H__

    22 

    23 

    24 #include "gstalsa.h"

    25 #include <gst/interfaces/mixertrack.h>

    26 

    27 

    28 G_BEGIN_DECLS

    29 

    30 

    31 #define GST_ALSA_MIXER_TRACK_TYPE               (gst_alsa_mixer_track_get_type ())

    32 #define GST_ALSA_MIXER_TRACK(obj)               (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ALSA_MIXER_TRACK,GstAlsaMixerTrack))

    33 #define GST_ALSA_MIXER_TRACK_CLASS(klass)       (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ALSA_MIXER_TRACK,GstAlsaMixerTrackClass))

    34 #define GST_IS_ALSA_MIXER_TRACK(obj)            (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ALSA_MIXER_TRACK))

    35 #define GST_IS_ALSA_MIXER_TRACK_CLASS(klass)    (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ALSA_MIXER_TRACK))

    36 #define GST_TYPE_ALSA_MIXER_TRACK               (gst_alsa_mixer_track_get_type())

    37 

    38 typedef struct _GstAlsaMixerTrack GstAlsaMixerTrack;

    39 typedef struct _GstAlsaMixerTrackClass GstAlsaMixerTrackClass;

    40 

    41 #define GST_ALSA_MIXER_TRACK_VOLUME         (1<<0)           /* common volume */

    42 #define GST_ALSA_MIXER_TRACK_PVOLUME        (1<<1)

    43 #define GST_ALSA_MIXER_TRACK_CVOLUME        (1<<2)

    44 #define GST_ALSA_MIXER_TRACK_SWITCH         (1<<3)           /* common switch */

    45 #define GST_ALSA_MIXER_TRACK_PSWITCH        (1<<4)

    46 #define GST_ALSA_MIXER_TRACK_CSWITCH        (1<<5)

    47 #define GST_ALSA_MIXER_TRACK_CSWITCH_EXCL   (1<<6)

    48 

    49 #define GST_ALSA_MAX_CHANNELS   (SND_MIXER_SCHN_LAST+1)

    50 

    51 struct _GstAlsaMixerTrack {

    52   GstMixerTrack          parent;

    53   snd_mixer_elem_t      *element;    /* the ALSA mixer element for this track */

    54   GstAlsaMixerTrack     *shared_mute;  

    55   gint                  track_num;

    56   guint32               alsa_flags;                /* alsa track capabilities */

    57   gint                  alsa_channels;  

    58   gint                  capture_group;  

    59   gint                  volumes[GST_ALSA_MAX_CHANNELS];

    60 };

    61 

    62 struct _GstAlsaMixerTrackClass {

    63   GstMixerTrackClass parent;

    64 };

    65 

    66 GType           gst_alsa_mixer_track_get_type   (void);

    67 GstMixerTrack * gst_alsa_mixer_track_new        (snd_mixer_elem_t *     element,

    68                                                  gint                   num,

    69                                                  gint                   track_num,

    70                                                  gint                   flags,

    71                                                  gboolean               sw,  /* is simple switch? */

    72                                                  GstAlsaMixerTrack *    shared_mute_track,

    73                                                  gboolean               label_append_capture);

    74 void            gst_alsa_mixer_track_update      (GstAlsaMixerTrack * alsa_track);

    75 

    76 G_END_DECLS

    77 

    78 

    79 #endif /* __GST_ALSA_MIXER_TRACK_H__ */