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 */ 163