1#ifndef __SOUND_CONTROL_H
2#define __SOUND_CONTROL_H
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25#include <sound/asound.h>
26
27#define snd_kcontrol_chip(kcontrol) ((kcontrol)->private_data)
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29struct snd_kcontrol;
30typedef int (snd_kcontrol_info_t) (struct snd_kcontrol * kcontrol, struct snd_ctl_elem_info * uinfo);
31typedef int (snd_kcontrol_get_t) (struct snd_kcontrol * kcontrol, struct snd_ctl_elem_value * ucontrol);
32typedef int (snd_kcontrol_put_t) (struct snd_kcontrol * kcontrol, struct snd_ctl_elem_value * ucontrol);
33typedef int (snd_kcontrol_tlv_rw_t)(struct snd_kcontrol *kcontrol,
34 int op_flag,
35 unsigned int size,
36 unsigned int __user *tlv);
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38
39struct snd_kcontrol_new {
40 snd_ctl_elem_iface_t iface;
41 unsigned int device;
42 unsigned int subdevice;
43 unsigned char *name;
44 unsigned int index;
45 unsigned int access;
46 unsigned int count;
47 snd_kcontrol_info_t *info;
48 snd_kcontrol_get_t *get;
49 snd_kcontrol_put_t *put;
50 union {
51 snd_kcontrol_tlv_rw_t *c;
52 const unsigned int *p;
53 } tlv;
54 unsigned long private_value;
55};
56
57struct snd_kcontrol_volatile {
58 struct snd_ctl_file *owner;
59 pid_t owner_pid;
60 unsigned int access;
61};
62
63struct snd_kcontrol {
64 struct list_head list;
65 struct snd_ctl_elem_id id;
66 unsigned int count;
67 snd_kcontrol_info_t *info;
68 snd_kcontrol_get_t *get;
69 snd_kcontrol_put_t *put;
70 union {
71 snd_kcontrol_tlv_rw_t *c;
72 const unsigned int *p;
73 } tlv;
74 unsigned long private_value;
75 void *private_data;
76 void (*private_free)(struct snd_kcontrol *kcontrol);
77 struct snd_kcontrol_volatile vd[0];
78};
79
80#define snd_kcontrol(n) list_entry(n, struct snd_kcontrol, list)
81
82struct snd_kctl_event {
83 struct list_head list;
84 struct snd_ctl_elem_id id;
85 unsigned int mask;
86};
87
88#define snd_kctl_event(n) list_entry(n, struct snd_kctl_event, list)
89
90struct snd_ctl_file {
91 struct list_head list;
92 struct snd_card *card;
93 pid_t pid;
94 int prefer_pcm_subdevice;
95 int prefer_rawmidi_subdevice;
96 wait_queue_head_t change_sleep;
97 spinlock_t read_lock;
98 struct fasync_struct *fasync;
99 int subscribed;
100 struct list_head events;
101};
102
103#define snd_ctl_file(n) list_entry(n, struct snd_ctl_file, list)
104
105typedef int (*snd_kctl_ioctl_func_t) (struct snd_card * card,
106 struct snd_ctl_file * control,
107 unsigned int cmd, unsigned long arg);
108
109void snd_ctl_notify(struct snd_card * card, unsigned int mask, struct snd_ctl_elem_id * id);
110
111struct snd_kcontrol *snd_ctl_new1(const struct snd_kcontrol_new * kcontrolnew, void * private_data);
112void snd_ctl_free_one(struct snd_kcontrol * kcontrol);
113int snd_ctl_add(struct snd_card * card, struct snd_kcontrol * kcontrol);
114int snd_ctl_remove(struct snd_card * card, struct snd_kcontrol * kcontrol);
115int snd_ctl_remove_id(struct snd_card * card, struct snd_ctl_elem_id *id);
116int snd_ctl_rename_id(struct snd_card * card, struct snd_ctl_elem_id *src_id, struct snd_ctl_elem_id *dst_id);
117struct snd_kcontrol *snd_ctl_find_numid(struct snd_card * card, unsigned int numid);
118struct snd_kcontrol *snd_ctl_find_id(struct snd_card * card, struct snd_ctl_elem_id *id);
119
120int snd_ctl_create(struct snd_card *card);
121
122int snd_ctl_register_ioctl(snd_kctl_ioctl_func_t fcn);
123int snd_ctl_unregister_ioctl(snd_kctl_ioctl_func_t fcn);
124#ifdef CONFIG_COMPAT
125int snd_ctl_register_ioctl_compat(snd_kctl_ioctl_func_t fcn);
126int snd_ctl_unregister_ioctl_compat(snd_kctl_ioctl_func_t fcn);
127#else
128#define snd_ctl_register_ioctl_compat(fcn)
129#define snd_ctl_unregister_ioctl_compat(fcn)
130#endif
131
132static inline unsigned int snd_ctl_get_ioffnum(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)
133{
134 return id->numid - kctl->id.numid;
135}
136
137static inline unsigned int snd_ctl_get_ioffidx(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)
138{
139 return id->index - kctl->id.index;
140}
141
142static inline unsigned int snd_ctl_get_ioff(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)
143{
144 if (id->numid) {
145 return snd_ctl_get_ioffnum(kctl, id);
146 } else {
147 return snd_ctl_get_ioffidx(kctl, id);
148 }
149}
150
151static inline struct snd_ctl_elem_id *snd_ctl_build_ioff(struct snd_ctl_elem_id *dst_id,
152 struct snd_kcontrol *src_kctl,
153 unsigned int offset)
154{
155 *dst_id = src_kctl->id;
156 dst_id->index += offset;
157 dst_id->numid += offset;
158 return dst_id;
159}
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164int snd_ctl_boolean_mono_info(struct snd_kcontrol *kcontrol,
165 struct snd_ctl_elem_info *uinfo);
166int snd_ctl_boolean_stereo_info(struct snd_kcontrol *kcontrol,
167 struct snd_ctl_elem_info *uinfo);
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172struct snd_kcontrol *snd_ctl_make_virtual_master(char *name,
173 const unsigned int *tlv);
174int _snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave,
175 unsigned int flags);
176
177#define SND_CTL_SLAVE_NEED_UPDATE (1 << 0)
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197static inline int
198snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave)
199{
200 return _snd_ctl_add_slave(master, slave, 0);
201}
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217static inline int
218snd_ctl_add_slave_uncached(struct snd_kcontrol *master,
219 struct snd_kcontrol *slave)
220{
221 return _snd_ctl_add_slave(master, slave, SND_CTL_SLAVE_NEED_UPDATE);
222}
223
224#endif
225