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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/sound/control.h | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/sound/control.h')
-rw-r--r-- | include/sound/control.h | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/include/sound/control.h b/include/sound/control.h new file mode 100644 index 000000000000..7b9444cd02f4 --- /dev/null +++ b/include/sound/control.h @@ -0,0 +1,162 @@ +#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(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 */ |