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1da177e4 LT |
1 | #ifndef __SOUND_CONTROL_H |
2 | #define __SOUND_CONTROL_H | |
3 | ||
4 | /* | |
5 | * Header file for control interface | |
6 | * Copyright (c) by Jaroslav Kysela <perex@suse.cz> | |
7 | * | |
8 | * | |
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. | |
13 | * | |
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. | |
18 | * | |
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 | |
22 | * | |
23 | */ | |
24 | ||
25 | #include <sound/asound.h> | |
26 | ||
27 | typedef struct sndrv_aes_iec958 snd_aes_iec958_t; | |
28 | typedef struct sndrv_ctl_card_info snd_ctl_card_info_t; | |
29 | typedef enum sndrv_ctl_elem_type snd_ctl_elem_type_t; | |
30 | typedef enum sndrv_ctl_elem_iface snd_ctl_elem_iface_t; | |
31 | typedef struct sndrv_ctl_elem_id snd_ctl_elem_id_t; | |
32 | typedef struct sndrv_ctl_elem_list snd_ctl_elem_list_t; | |
33 | typedef struct sndrv_ctl_elem_info snd_ctl_elem_info_t; | |
34 | typedef struct sndrv_ctl_elem_value snd_ctl_elem_value_t; | |
35 | typedef enum sndrv_ctl_event_type snd_ctl_event_type_t; | |
36 | typedef struct sndrv_ctl_event snd_ctl_event_t; | |
37 | ||
38 | #define snd_kcontrol_chip(kcontrol) ((kcontrol)->private_data) | |
39 | ||
40 | typedef int (snd_kcontrol_info_t) (snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo); | |
41 | typedef int (snd_kcontrol_get_t) (snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol); | |
42 | typedef int (snd_kcontrol_put_t) (snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol); | |
43 | ||
44 | typedef struct _snd_kcontrol_new { | |
45 | snd_ctl_elem_iface_t iface; /* interface identifier */ | |
46 | unsigned int device; /* device/client number */ | |
47 | unsigned int subdevice; /* subdevice (substream) number */ | |
48 | unsigned char *name; /* ASCII name of item */ | |
49 | unsigned int index; /* index of item */ | |
50 | unsigned int access; /* access rights */ | |
51 | unsigned int count; /* count of same elements */ | |
52 | snd_kcontrol_info_t *info; | |
53 | snd_kcontrol_get_t *get; | |
54 | snd_kcontrol_put_t *put; | |
55 | unsigned long private_value; | |
56 | } snd_kcontrol_new_t; | |
57 | ||
58 | typedef struct _snd_kcontrol_volatile { | |
59 | snd_ctl_file_t *owner; /* locked */ | |
60 | pid_t owner_pid; | |
61 | unsigned int access; /* access rights */ | |
62 | } snd_kcontrol_volatile_t; | |
63 | ||
64 | struct _snd_kcontrol { | |
65 | struct list_head list; /* list of controls */ | |
66 | snd_ctl_elem_id_t id; | |
67 | unsigned int count; /* count of same elements */ | |
68 | snd_kcontrol_info_t *info; | |
69 | snd_kcontrol_get_t *get; | |
70 | snd_kcontrol_put_t *put; | |
71 | unsigned long private_value; | |
72 | void *private_data; | |
73 | void (*private_free)(snd_kcontrol_t *kcontrol); | |
74 | snd_kcontrol_volatile_t vd[0]; /* volatile data */ | |
75 | }; | |
76 | ||
77 | #define snd_kcontrol(n) list_entry(n, snd_kcontrol_t, list) | |
78 | ||
79 | typedef struct _snd_kctl_event { | |
80 | struct list_head list; /* list of events */ | |
81 | snd_ctl_elem_id_t id; | |
82 | unsigned int mask; | |
83 | } snd_kctl_event_t; | |
84 | ||
85 | #define snd_kctl_event(n) list_entry(n, snd_kctl_event_t, list) | |
86 | ||
87 | struct _snd_ctl_file { | |
88 | struct list_head list; /* list of all control files */ | |
89 | snd_card_t *card; | |
90 | pid_t pid; | |
91 | int prefer_pcm_subdevice; | |
92 | int prefer_rawmidi_subdevice; | |
93 | wait_queue_head_t change_sleep; | |
94 | spinlock_t read_lock; | |
95 | struct fasync_struct *fasync; | |
96 | int subscribed; /* read interface is activated */ | |
97 | struct list_head events; /* waiting events for read */ | |
98 | }; | |
99 | ||
100 | #define snd_ctl_file(n) list_entry(n, snd_ctl_file_t, list) | |
101 | ||
102 | typedef int (*snd_kctl_ioctl_func_t) (snd_card_t * card, | |
103 | snd_ctl_file_t * control, | |
104 | unsigned int cmd, unsigned long arg); | |
105 | ||
106 | void snd_ctl_notify(snd_card_t * card, unsigned int mask, snd_ctl_elem_id_t * id); | |
107 | ||
108 | snd_kcontrol_t *snd_ctl_new(snd_kcontrol_t * kcontrol, unsigned int access); | |
109 | snd_kcontrol_t *snd_ctl_new1(snd_kcontrol_new_t * kcontrolnew, void * private_data); | |
110 | void snd_ctl_free_one(snd_kcontrol_t * kcontrol); | |
111 | int snd_ctl_add(snd_card_t * card, snd_kcontrol_t * kcontrol); | |
112 | int snd_ctl_remove(snd_card_t * card, snd_kcontrol_t * kcontrol); | |
113 | int snd_ctl_remove_id(snd_card_t * card, snd_ctl_elem_id_t *id); | |
114 | int snd_ctl_rename_id(snd_card_t * card, snd_ctl_elem_id_t *src_id, snd_ctl_elem_id_t *dst_id); | |
115 | snd_kcontrol_t *snd_ctl_find_numid(snd_card_t * card, unsigned int numid); | |
116 | snd_kcontrol_t *snd_ctl_find_id(snd_card_t * card, snd_ctl_elem_id_t *id); | |
117 | ||
118 | int snd_ctl_create(snd_card_t *card); | |
119 | ||
120 | int snd_ctl_register_ioctl(snd_kctl_ioctl_func_t fcn); | |
121 | int snd_ctl_unregister_ioctl(snd_kctl_ioctl_func_t fcn); | |
122 | #ifdef CONFIG_COMPAT | |
123 | int snd_ctl_register_ioctl_compat(snd_kctl_ioctl_func_t fcn); | |
124 | int snd_ctl_unregister_ioctl_compat(snd_kctl_ioctl_func_t fcn); | |
125 | #else | |
126 | #define snd_ctl_register_ioctl_compat(fcn) | |
127 | #define snd_ctl_unregister_ioctl_compat(fcn) | |
128 | #endif | |
129 | ||
130 | int snd_ctl_elem_read(snd_card_t *card, snd_ctl_elem_value_t *control); | |
131 | int snd_ctl_elem_write(snd_card_t *card, snd_ctl_file_t *file, snd_ctl_elem_value_t *control); | |
132 | ||
133 | static inline unsigned int snd_ctl_get_ioffnum(snd_kcontrol_t *kctl, snd_ctl_elem_id_t *id) | |
134 | { | |
135 | return id->numid - kctl->id.numid; | |
136 | } | |
137 | ||
138 | static inline unsigned int snd_ctl_get_ioffidx(snd_kcontrol_t *kctl, snd_ctl_elem_id_t *id) | |
139 | { | |
140 | return id->index - kctl->id.index; | |
141 | } | |
142 | ||
143 | static inline unsigned int snd_ctl_get_ioff(snd_kcontrol_t *kctl, snd_ctl_elem_id_t *id) | |
144 | { | |
145 | if (id->numid) { | |
146 | return snd_ctl_get_ioffnum(kctl, id); | |
147 | } else { | |
148 | return snd_ctl_get_ioffidx(kctl, id); | |
149 | } | |
150 | } | |
151 | ||
152 | static inline snd_ctl_elem_id_t *snd_ctl_build_ioff(snd_ctl_elem_id_t *dst_id, | |
153 | snd_kcontrol_t *src_kctl, | |
154 | unsigned int offset) | |
155 | { | |
156 | *dst_id = src_kctl->id; | |
157 | dst_id->index += offset; | |
158 | dst_id->numid += offset; | |
159 | return dst_id; | |
160 | } | |
161 | ||
162 | #endif /* __SOUND_CONTROL_H */ |