aboutsummaryrefslogtreecommitdiffstats
path: root/include/sound/control.h
blob: ef7903c7a3277b63d7860d8c6c9d18bbb9e9230d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
#ifndef __SOUND_CONTROL_H
#define __SOUND_CONTROL_H

/*
 *  Header file for control interface
 *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#include <sound/asound.h>

typedef struct sndrv_aes_iec958 snd_aes_iec958_t;
typedef struct sndrv_ctl_card_info snd_ctl_card_info_t;
typedef enum sndrv_ctl_elem_type snd_ctl_elem_type_t;
typedef enum sndrv_ctl_elem_iface snd_ctl_elem_iface_t;
typedef struct sndrv_ctl_elem_id snd_ctl_elem_id_t;
typedef struct sndrv_ctl_elem_list snd_ctl_elem_list_t;
typedef struct sndrv_ctl_elem_info snd_ctl_elem_info_t;
typedef struct sndrv_ctl_elem_value snd_ctl_elem_value_t;
typedef enum sndrv_ctl_event_type snd_ctl_event_type_t;
typedef struct sndrv_ctl_event snd_ctl_event_t;

#define snd_kcontrol_chip(kcontrol) ((kcontrol)->private_data)

typedef int (snd_kcontrol_info_t) (snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo);
typedef int (snd_kcontrol_get_t) (snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol);
typedef int (snd_kcontrol_put_t) (snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol);

typedef struct _snd_kcontrol_new {
	snd_ctl_elem_iface_t iface;	/* interface identifier */
	unsigned int device;		/* device/client number */
	unsigned int subdevice;		/* subdevice (substream) number */
	unsigned char *name;		/* ASCII name of item */
	unsigned int index;		/* index of item */
	unsigned int access;		/* access rights */
	unsigned int count;		/* count of same elements */
	snd_kcontrol_info_t *info;
	snd_kcontrol_get_t *get;
	snd_kcontrol_put_t *put;
	unsigned long private_value;
} snd_kcontrol_new_t;

typedef struct _snd_kcontrol_volatile {
	snd_ctl_file_t *owner;	/* locked */
	pid_t owner_pid;
	unsigned int access;	/* access rights */
} snd_kcontrol_volatile_t;

struct _snd_kcontrol {
	struct list_head list;		/* list of controls */
	snd_ctl_elem_id_t id;
	unsigned int count;		/* count of same elements */
	snd_kcontrol_info_t *info;
	snd_kcontrol_get_t *get;
	snd_kcontrol_put_t *put;
	unsigned long private_value;
	void *private_data;
	void (*private_free)(snd_kcontrol_t *kcontrol);
	snd_kcontrol_volatile_t vd[0];	/* volatile data */
};

#define snd_kcontrol(n) list_entry(n, snd_kcontrol_t, list)

typedef struct _snd_kctl_event {
	struct list_head list;	/* list of events */
	snd_ctl_elem_id_t id;
	unsigned int mask;
} snd_kctl_event_t;

#define snd_kctl_event(n) list_entry(n, snd_kctl_event_t, list)

struct _snd_ctl_file {
	struct list_head list;		/* list of all control files */
	snd_card_t *card;
	pid_t pid;
	int prefer_pcm_subdevice;
	int prefer_rawmidi_subdevice;
	wait_queue_head_t change_sleep;
	spinlock_t read_lock;
	struct fasync_struct *fasync;
	int subscribed;			/* read interface is activated */
	struct list_head events;	/* waiting events for read */
};

#define snd_ctl_file(n) list_entry(n, snd_ctl_file_t, list)

typedef int (*snd_kctl_ioctl_func_t) (snd_card_t * card,
				 snd_ctl_file_t * control,
				 unsigned int cmd, unsigned long arg);

void snd_ctl_notify(snd_card_t * card, unsigned int mask, snd_ctl_elem_id_t * id);

snd_kcontrol_t *snd_ctl_new(snd_kcontrol_t * kcontrol, unsigned int access);
snd_kcontrol_t *snd_ctl_new1(const snd_kcontrol_new_t * kcontrolnew, void * private_data);
void snd_ctl_free_one(snd_kcontrol_t * kcontrol);
int snd_ctl_add(snd_card_t * card, snd_kcontrol_t * kcontrol);
int snd_ctl_remove(snd_card_t * card, snd_kcontrol_t * kcontrol);
int snd_ctl_remove_id(snd_card_t * card, snd_ctl_elem_id_t *id);
int snd_ctl_rename_id(snd_card_t * card, snd_ctl_elem_id_t *src_id, snd_ctl_elem_id_t *dst_id);
snd_kcontrol_t *snd_ctl_find_numid(snd_card_t * card, unsigned int numid);
snd_kcontrol_t *snd_ctl_find_id(snd_card_t * card, snd_ctl_elem_id_t *id);

int snd_ctl_create(snd_card_t *card);

int snd_ctl_register_ioctl(snd_kctl_ioctl_func_t fcn);
int snd_ctl_unregister_ioctl(snd_kctl_ioctl_func_t fcn);
#ifdef CONFIG_COMPAT
int snd_ctl_register_ioctl_compat(snd_kctl_ioctl_func_t fcn);
int snd_ctl_unregister_ioctl_compat(snd_kctl_ioctl_func_t fcn);
#else
#define snd_ctl_register_ioctl_compat(fcn)
#define snd_ctl_unregister_ioctl_compat(fcn)
#endif

int snd_ctl_elem_read(snd_card_t *card, snd_ctl_elem_value_t *control);
int snd_ctl_elem_write(snd_card_t *card, snd_ctl_file_t *file, snd_ctl_elem_value_t *control);

static inline unsigned int snd_ctl_get_ioffnum(snd_kcontrol_t *kctl, snd_ctl_elem_id_t *id)
{
	return id->numid - kctl->id.numid;
}

static inline unsigned int snd_ctl_get_ioffidx(snd_kcontrol_t *kctl, snd_ctl_elem_id_t *id)
{
	return id->index - kctl->id.index;
}

static inline unsigned int snd_ctl_get_ioff(snd_kcontrol_t *kctl, snd_ctl_elem_id_t *id)
{
	if (id->numid) {
		return snd_ctl_get_ioffnum(kctl, id);
	} else {
		return snd_ctl_get_ioffidx(kctl, id);
	}
}

static inline snd_ctl_elem_id_t *snd_ctl_build_ioff(snd_ctl_elem_id_t *dst_id,
						    snd_kcontrol_t *src_kctl,
						    unsigned int offset)
{
	*dst_id = src_kctl->id;
	dst_id->index += offset;
	dst_id->numid += offset;
	return dst_id;
}

#endif	/* __SOUND_CONTROL_H */