1 #ifndef __SOUND_CONTROL_H
2 #define __SOUND_CONTROL_H
5 * Header file for control interface
6 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include <sound/asound.h>
27 #define snd_kcontrol_chip(kcontrol) ((kcontrol)->private_data)
30 typedef int (snd_kcontrol_info_t) (struct snd_kcontrol * kcontrol, struct snd_ctl_elem_info * uinfo);
31 typedef int (snd_kcontrol_get_t) (struct snd_kcontrol * kcontrol, struct snd_ctl_elem_value * ucontrol);
32 typedef int (snd_kcontrol_put_t) (struct snd_kcontrol * kcontrol, struct snd_ctl_elem_value * ucontrol);
34 struct snd_kcontrol_new {
35 snd_ctl_elem_iface_t iface; /* interface identifier */
36 unsigned int device; /* device/client number */
37 unsigned int subdevice; /* subdevice (substream) number */
38 unsigned char *name; /* ASCII name of item */
39 unsigned int index; /* index of item */
40 unsigned int access; /* access rights */
41 unsigned int count; /* count of same elements */
42 snd_kcontrol_info_t *info;
43 snd_kcontrol_get_t *get;
44 snd_kcontrol_put_t *put;
46 unsigned long private_value;
49 struct snd_kcontrol_volatile {
50 struct snd_ctl_file *owner; /* locked */
52 unsigned int access; /* access rights */
56 struct list_head list; /* list of controls */
57 struct snd_ctl_elem_id id;
58 unsigned int count; /* count of same elements */
59 snd_kcontrol_info_t *info;
60 snd_kcontrol_get_t *get;
61 snd_kcontrol_put_t *put;
63 unsigned long private_value;
65 void (*private_free)(struct snd_kcontrol *kcontrol);
66 struct snd_kcontrol_volatile vd[0]; /* volatile data */
69 #define snd_kcontrol(n) list_entry(n, struct snd_kcontrol, list)
71 struct snd_kctl_event {
72 struct list_head list; /* list of events */
73 struct snd_ctl_elem_id id;
77 #define snd_kctl_event(n) list_entry(n, struct snd_kctl_event, list)
80 struct list_head list; /* list of all control files */
81 struct snd_card *card;
83 int prefer_pcm_subdevice;
84 int prefer_rawmidi_subdevice;
85 wait_queue_head_t change_sleep;
87 struct fasync_struct *fasync;
88 int subscribed; /* read interface is activated */
89 struct list_head events; /* waiting events for read */
92 #define snd_ctl_file(n) list_entry(n, struct snd_ctl_file, list)
94 typedef int (*snd_kctl_ioctl_func_t) (struct snd_card * card,
95 struct snd_ctl_file * control,
96 unsigned int cmd, unsigned long arg);
98 void snd_ctl_notify(struct snd_card * card, unsigned int mask, struct snd_ctl_elem_id * id);
100 struct snd_kcontrol *snd_ctl_new(struct snd_kcontrol * kcontrol, unsigned int access);
101 struct snd_kcontrol *snd_ctl_new1(const struct snd_kcontrol_new * kcontrolnew, void * private_data);
102 void snd_ctl_free_one(struct snd_kcontrol * kcontrol);
103 int snd_ctl_add(struct snd_card * card, struct snd_kcontrol * kcontrol);
104 int snd_ctl_remove(struct snd_card * card, struct snd_kcontrol * kcontrol);
105 int snd_ctl_remove_id(struct snd_card * card, struct snd_ctl_elem_id *id);
106 int snd_ctl_rename_id(struct snd_card * card, struct snd_ctl_elem_id *src_id, struct snd_ctl_elem_id *dst_id);
107 struct snd_kcontrol *snd_ctl_find_numid(struct snd_card * card, unsigned int numid);
108 struct snd_kcontrol *snd_ctl_find_id(struct snd_card * card, struct snd_ctl_elem_id *id);
110 int snd_ctl_create(struct snd_card *card);
112 int snd_ctl_register_ioctl(snd_kctl_ioctl_func_t fcn);
113 int snd_ctl_unregister_ioctl(snd_kctl_ioctl_func_t fcn);
115 int snd_ctl_register_ioctl_compat(snd_kctl_ioctl_func_t fcn);
116 int snd_ctl_unregister_ioctl_compat(snd_kctl_ioctl_func_t fcn);
118 #define snd_ctl_register_ioctl_compat(fcn)
119 #define snd_ctl_unregister_ioctl_compat(fcn)
122 int snd_ctl_elem_read(struct snd_card *card, struct snd_ctl_elem_value *control);
123 int snd_ctl_elem_write(struct snd_card *card, struct snd_ctl_file *file, struct snd_ctl_elem_value *control);
125 static inline unsigned int snd_ctl_get_ioffnum(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)
127 return id->numid - kctl->id.numid;
130 static inline unsigned int snd_ctl_get_ioffidx(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)
132 return id->index - kctl->id.index;
135 static inline unsigned int snd_ctl_get_ioff(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)
138 return snd_ctl_get_ioffnum(kctl, id);
140 return snd_ctl_get_ioffidx(kctl, id);
144 static inline struct snd_ctl_elem_id *snd_ctl_build_ioff(struct snd_ctl_elem_id *dst_id,
145 struct snd_kcontrol *src_kctl,
148 *dst_id = src_kctl->id;
149 dst_id->index += offset;
150 dst_id->numid += offset;
154 #endif /* __SOUND_CONTROL_H */