#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_COMPATint 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 */