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#ifndef __SOUND_CONTROL_H

#define __SOUND_CONTROL_H

/*

 *  Header file for control interface

 *  Copyright (c) by Jaroslav Kysela <perex@perex.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>

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

struct snd_kcontrol;

typedef int (snd_kcontrol_info_t) (struct snd_kcontrol * kcontrol, struct snd_ctl_elem_info * uinfo);

typedef int (snd_kcontrol_get_t) (struct snd_kcontrol * kcontrol, struct snd_ctl_elem_value * ucontrol);

typedef int (snd_kcontrol_put_t) (struct snd_kcontrol * kcontrol, struct snd_ctl_elem_value * ucontrol);

typedef int (snd_kcontrol_tlv_rw_t)(struct snd_kcontrol *kcontrol,

                                    int op_flag, /* 0=read,1=write,-1=command */

                                    unsigned int size,

                                    unsigned int __user *tlv);

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;

        union {

                snd_kcontrol_tlv_rw_t *c;

                const unsigned int *p;

        } tlv;

        unsigned long private_value;

};

struct snd_kcontrol_volatile {

        struct snd_ctl_file *owner;     /* locked */

        pid_t owner_pid;

        unsigned int access;    /* access rights */

};

struct snd_kcontrol {

        struct list_head list;          /* list of controls */

        struct snd_ctl_elem_id id;

        unsigned int count;             /* count of same elements */

        snd_kcontrol_info_t *info;

        snd_kcontrol_get_t *get;

        snd_kcontrol_put_t *put;

        union {

                snd_kcontrol_tlv_rw_t *c;

                const unsigned int *p;

        } tlv;

        unsigned long private_value;

        void *private_data;

        void (*private_free)(struct snd_kcontrol *kcontrol);

        struct snd_kcontrol_volatile vd[0];      /* volatile data */

};

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

struct snd_kctl_event {

        struct list_head list;  /* list of events */

        struct snd_ctl_elem_id id;

        unsigned int mask;

};

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

struct snd_ctl_file {

        struct list_head list;          /* list of all control files */

        struct snd_card *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, struct snd_ctl_file, list)

typedef int (*snd_kctl_ioctl_func_t) (struct snd_card * card,

                                      struct snd_ctl_file * control,

                                      unsigned int cmd, unsigned long arg);

void snd_ctl_notify(struct snd_card * card, unsigned int mask, struct snd_ctl_elem_id * id);

struct snd_kcontrol *snd_ctl_new1(const struct snd_kcontrol_new * kcontrolnew, void * private_data);

void snd_ctl_free_one(struct snd_kcontrol * kcontrol);

int snd_ctl_add(struct snd_card * card, struct snd_kcontrol * kcontrol);

int snd_ctl_remove(struct snd_card * card, struct snd_kcontrol * kcontrol);

int snd_ctl_remove_id(struct snd_card * card, struct snd_ctl_elem_id *id);

int snd_ctl_rename_id(struct snd_card * card, struct snd_ctl_elem_id *src_id, struct snd_ctl_elem_id *dst_id);

struct snd_kcontrol *snd_ctl_find_numid(struct snd_card * card, unsigned int numid);

struct snd_kcontrol *snd_ctl_find_id(struct snd_card * card, struct snd_ctl_elem_id *id);

int snd_ctl_create(struct snd_card *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(struct snd_card *card, struct snd_ctl_elem_value *control);

int snd_ctl_elem_write(struct snd_card *card, struct snd_ctl_file *file, struct snd_ctl_elem_value *control);

static inline unsigned int snd_ctl_get_ioffnum(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)

{

        return id->numid - kctl->id.numid;

}

static inline unsigned int snd_ctl_get_ioffidx(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)

{

        return id->index - kctl->id.index;

}

static inline unsigned int snd_ctl_get_ioff(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)

{

        if (id->numid) {

                return snd_ctl_get_ioffnum(kctl, id);

        } else {

                return snd_ctl_get_ioffidx(kctl, id);

        }

}

static inline struct snd_ctl_elem_id *snd_ctl_build_ioff(struct snd_ctl_elem_id *dst_id,

                                                    struct snd_kcontrol *src_kctl,

                                                    unsigned int offset)

{

        *dst_id = src_kctl->id;

        dst_id->index += offset;

        dst_id->numid += offset;

        return dst_id;

}

/*

 * Frequently used control callbacks

 */

int snd_ctl_boolean_mono_info(struct snd_kcontrol *kcontrol,

                              struct snd_ctl_elem_info *uinfo);

int snd_ctl_boolean_stereo_info(struct snd_kcontrol *kcontrol,

                                struct snd_ctl_elem_info *uinfo);

#endif  /* __SOUND_CONTROL_H */