sys/oss/gstossmixer.h

   1 /* GStreamer OSS Mixer implementation
   2  * Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
   3  *
   4  * gstossmixer.h: mixer interface implementation for OSS
   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
  23 #ifndef __GST_OSS_MIXER_H__
  24 #define __GST_OSS_MIXER_H__
  25
  26
  27 #include <gst/gst.h>
  28 #include <gst/interfaces/mixer.h>
  29
  30 #include "gstosshelper.h"
  31
  32
  33 G_BEGIN_DECLS
  34
  35
  36 #define GST_OSS_MIXER(obj)              ((GstOssMixer*)(obj))
  37
  38
  39 typedef enum {
  40   GST_OSS_MIXER_CAPTURE = 1<<0,
  41   GST_OSS_MIXER_PLAYBACK = 1<<1,
  42   GST_OSS_MIXER_ALL = GST_OSS_MIXER_CAPTURE | GST_OSS_MIXER_PLAYBACK
  43 } GstOssMixerDirection;
  44
  45
  46 typedef struct _GstOssMixer GstOssMixer;
  47
  48
  49 struct _GstOssMixer {
  50   GList *               tracklist;      /* list of available tracks */
  51
  52   gint                  mixer_fd;
  53
  54   gchar *               device;
  55   gchar *               cardname;
  56
  57   gint                  recmask;
  58   gint                  recdevs;
  59   gint                  stereomask;
  60   gint                  devmask;
  61   gint                  mixcaps;
  62
  63   GstOssMixerDirection dir;
  64 };
  65
  66
  67 GstOssMixer*    gst_ossmixer_new                (const gchar *device,
  68                                                  GstOssMixerDirection dir);
  69 void            gst_ossmixer_free               (GstOssMixer *mixer);
  70
  71 const GList*    gst_ossmixer_list_tracks        (GstOssMixer * mixer);
  72 void            gst_ossmixer_set_volume         (GstOssMixer * mixer,
  73                                                  GstMixerTrack * track,
  74                                                  gint * volumes);
  75 void            gst_ossmixer_get_volume         (GstOssMixer * mixer,
  76                                                  GstMixerTrack * track,
  77                                                  gint * volumes);
  78 void            gst_ossmixer_set_record         (GstOssMixer * mixer,
  79                                                  GstMixerTrack * track,
  80                                                  gboolean record);
  81 void            gst_ossmixer_set_mute           (GstOssMixer * mixer,
  82                                                  GstMixerTrack * track,
  83                                                  gboolean mute);
  84
  85
  86 #define GST_IMPLEMENT_OSS_MIXER_METHODS(Type, interface_as_function)            \
  87 static gboolean                                                                 \
  88 interface_as_function ## _supported (Type *this, GType iface_type)              \
  89 {                                                                               \
  90   g_assert (iface_type == GST_TYPE_MIXER);                                      \
  91                                                                                 \
  92   return (this->mixer != NULL);                                                 \
  93 }                                                                               \
  94                                                                                 \
  95 static const GList*                                                             \
  96 interface_as_function ## _list_tracks (GstMixer * mixer)                        \
  97 {                                                                               \
  98   Type *this = (Type*) mixer;                                                   \
  99                                                                                 \
 100   g_return_val_if_fail (this != NULL, NULL);                                    \
 101   g_return_val_if_fail (this->mixer != NULL, NULL);                             \
 102                                                                                 \
 103   return gst_ossmixer_list_tracks (this->mixer);                                \
 104 }                                                                               \
 105                                                                                 \
 106 static void                                                                     \
 107 interface_as_function ## _set_volume (GstMixer * mixer, GstMixerTrack * track,  \
 108     gint * volumes)                                                             \
 109 {                                                                               \
 110   Type *this = (Type*) mixer;                                                   \
 111                                                                                 \
 112   g_return_if_fail (this != NULL);                                              \
 113   g_return_if_fail (this->mixer != NULL);                                       \
 114                                                                                 \
 115   gst_ossmixer_set_volume (this->mixer, track, volumes);                        \
 116 }                                                                               \
 117                                                                                 \
 118 static void                                                                     \
 119 interface_as_function ## _get_volume (GstMixer * mixer, GstMixerTrack * track,  \
 120     gint * volumes)                                                             \
 121 {                                                                               \
 122   Type *this = (Type*) mixer;                                                   \
 123                                                                                 \
 124   g_return_if_fail (this != NULL);                                              \
 125   g_return_if_fail (this->mixer != NULL);                                       \
 126                                                                                 \
 127   gst_ossmixer_get_volume (this->mixer, track, volumes);                        \
 128 }                                                                               \
 129                                                                                 \
 130 static void                                                                     \
 131 interface_as_function ## _set_record (GstMixer * mixer, GstMixerTrack * track,  \
 132     gboolean record)                                                            \
 133 {                                                                               \
 134   Type *this = (Type*) mixer;                                                   \
 135                                                                                 \
 136   g_return_if_fail (this != NULL);                                              \
 137   g_return_if_fail (this->mixer != NULL);                                       \
 138                                                                                 \
 139   gst_ossmixer_set_record (this->mixer, track, record);                         \
 140 }                                                                               \
 141                                                                                 \
 142 static void                                                                     \
 143 interface_as_function ## _set_mute (GstMixer * mixer, GstMixerTrack * track,    \
 144     gboolean mute)                                                              \
 145 {                                                                               \
 146   Type *this = (Type*) mixer;                                                   \
 147                                                                                 \
 148   g_return_if_fail (this != NULL);                                              \
 149   g_return_if_fail (this->mixer != NULL);                                       \
 150                                                                                 \
 151   gst_ossmixer_set_mute (this->mixer, track, mute);                             \
 152 }                                                                               \
 153                                                                                 \
 154 static void                                                                     \
 155 interface_as_function ## _interface_init (GstMixerInterface * iface)                \
 156 {                                                                               \
 157   GST_MIXER_TYPE (iface) = GST_MIXER_HARDWARE;                                  \
 158                                                                                 \
 159   /* set up the interface hooks */                                              \
 160   iface->list_tracks = interface_as_function ## _list_tracks;                   \
 161   iface->set_volume = interface_as_function ## _set_volume;                     \
 162   iface->get_volume = interface_as_function ## _get_volume;                     \
 163   iface->set_mute = interface_as_function ## _set_mute;                         \
 164   iface->set_record = interface_as_function ## _set_record;                     \
 165 }
 166
 167
 168 G_END_DECLS
 169
 170
 171 #endif /* __GST_OSS_MIXER_H__ */