mirror of https://gitee.com/openkylin/linux.git
264 lines
8.5 KiB
C
264 lines
8.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
#ifndef __SOUND_CONTROL_H
|
|
#define __SOUND_CONTROL_H
|
|
|
|
/*
|
|
* Header file for control interface
|
|
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
|
|
*/
|
|
|
|
#include <linux/wait.h>
|
|
#include <linux/nospec.h>
|
|
#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, /* SNDRV_CTL_TLV_OP_XXX */
|
|
unsigned int size,
|
|
unsigned int __user *tlv);
|
|
|
|
/* internal flag for skipping validations */
|
|
#ifdef CONFIG_SND_CTL_VALIDATION
|
|
#define SNDRV_CTL_ELEM_ACCESS_SKIP_CHECK (1 << 27)
|
|
#define snd_ctl_skip_validation(info) \
|
|
((info)->access & SNDRV_CTL_ELEM_ACCESS_SKIP_CHECK)
|
|
#else
|
|
#define SNDRV_CTL_ELEM_ACCESS_SKIP_CHECK 0
|
|
#define snd_ctl_skip_validation(info) true
|
|
#endif
|
|
|
|
enum {
|
|
SNDRV_CTL_TLV_OP_READ = 0,
|
|
SNDRV_CTL_TLV_OP_WRITE = 1,
|
|
SNDRV_CTL_TLV_OP_CMD = -1,
|
|
};
|
|
|
|
struct snd_kcontrol_new {
|
|
snd_ctl_elem_iface_t iface; /* interface identifier */
|
|
unsigned int device; /* device/client number */
|
|
unsigned int subdevice; /* subdevice (substream) number */
|
|
const 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 */
|
|
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 pid;
|
|
|
|
enum {
|
|
SND_CTL_SUBDEV_PCM,
|
|
SND_CTL_SUBDEV_RAWMIDI,
|
|
SND_CTL_SUBDEV_ITEMS,
|
|
};
|
|
|
|
struct snd_ctl_file {
|
|
struct list_head list; /* list of all control files */
|
|
struct snd_card *card;
|
|
struct pid *pid;
|
|
int preferred_subdevice[SND_CTL_SUBDEV_ITEMS];
|
|
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_replace(struct snd_card *card, struct snd_kcontrol *kcontrol, bool add_on_replace);
|
|
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);
|
|
int snd_ctl_activate_id(struct snd_card *card, struct snd_ctl_elem_id *id,
|
|
int active);
|
|
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_get_preferred_subdevice(struct snd_card *card, int type);
|
|
|
|
static inline unsigned int snd_ctl_get_ioffnum(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)
|
|
{
|
|
unsigned int ioff = id->numid - kctl->id.numid;
|
|
return array_index_nospec(ioff, kctl->count);
|
|
}
|
|
|
|
static inline unsigned int snd_ctl_get_ioffidx(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)
|
|
{
|
|
unsigned int ioff = id->index - kctl->id.index;
|
|
return array_index_nospec(ioff, kctl->count);
|
|
}
|
|
|
|
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/helpers
|
|
*/
|
|
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);
|
|
int snd_ctl_enum_info(struct snd_ctl_elem_info *info, unsigned int channels,
|
|
unsigned int items, const char *const names[]);
|
|
|
|
/*
|
|
* virtual master control
|
|
*/
|
|
struct snd_kcontrol *snd_ctl_make_virtual_master(char *name,
|
|
const unsigned int *tlv);
|
|
int _snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave,
|
|
unsigned int flags);
|
|
/* optional flags for slave */
|
|
#define SND_CTL_SLAVE_NEED_UPDATE (1 << 0)
|
|
|
|
/**
|
|
* snd_ctl_add_slave - Add a virtual slave control
|
|
* @master: vmaster element
|
|
* @slave: slave element to add
|
|
*
|
|
* Add a virtual slave control to the given master element created via
|
|
* snd_ctl_create_virtual_master() beforehand.
|
|
*
|
|
* All slaves must be the same type (returning the same information
|
|
* via info callback). The function doesn't check it, so it's your
|
|
* responsibility.
|
|
*
|
|
* Also, some additional limitations:
|
|
* at most two channels,
|
|
* logarithmic volume control (dB level) thus no linear volume,
|
|
* master can only attenuate the volume without gain
|
|
*
|
|
* Return: Zero if successful or a negative error code.
|
|
*/
|
|
static inline int
|
|
snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave)
|
|
{
|
|
return _snd_ctl_add_slave(master, slave, 0);
|
|
}
|
|
|
|
/**
|
|
* snd_ctl_add_slave_uncached - Add a virtual slave control
|
|
* @master: vmaster element
|
|
* @slave: slave element to add
|
|
*
|
|
* Add a virtual slave control to the given master.
|
|
* Unlike snd_ctl_add_slave(), the element added via this function
|
|
* is supposed to have volatile values, and get callback is called
|
|
* at each time queried from the master.
|
|
*
|
|
* When the control peeks the hardware values directly and the value
|
|
* can be changed by other means than the put callback of the element,
|
|
* this function should be used to keep the value always up-to-date.
|
|
*
|
|
* Return: Zero if successful or a negative error code.
|
|
*/
|
|
static inline int
|
|
snd_ctl_add_slave_uncached(struct snd_kcontrol *master,
|
|
struct snd_kcontrol *slave)
|
|
{
|
|
return _snd_ctl_add_slave(master, slave, SND_CTL_SLAVE_NEED_UPDATE);
|
|
}
|
|
|
|
int snd_ctl_add_vmaster_hook(struct snd_kcontrol *kctl,
|
|
void (*hook)(void *private_data, int),
|
|
void *private_data);
|
|
void snd_ctl_sync_vmaster(struct snd_kcontrol *kctl, bool hook_only);
|
|
#define snd_ctl_sync_vmaster_hook(kctl) snd_ctl_sync_vmaster(kctl, true)
|
|
int snd_ctl_apply_vmaster_slaves(struct snd_kcontrol *kctl,
|
|
int (*func)(struct snd_kcontrol *vslave,
|
|
struct snd_kcontrol *slave,
|
|
void *arg),
|
|
void *arg);
|
|
|
|
/*
|
|
* Helper functions for jack-detection controls
|
|
*/
|
|
struct snd_kcontrol *
|
|
snd_kctl_jack_new(const char *name, struct snd_card *card);
|
|
void snd_kctl_jack_report(struct snd_card *card,
|
|
struct snd_kcontrol *kctl, bool status);
|
|
|
|
#endif /* __SOUND_CONTROL_H */
|