alsa-doc/alsa-lib/control_8h_source.html

/*

 *   This library is free software; you can redistribute it and/or modify

 *   it under the terms of the GNU Lesser General Public License as

 *   published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.

 *

 *   You should have received a copy of the GNU Lesser General Public

 *   License along with this library; if not, write to the Free Software

 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

 *

 */


#if !defined(__ASOUNDLIB_H) && !defined(ALSA_LIBRARY_BUILD)

/* don't use ALSA_LIBRARY_BUILD define in sources outside alsa-lib */

#warning "use #include <alsa/asoundlib.h>, <alsa/control.h> should not be used directly"

#include <alsa/asoundlib.h>

#endif


#ifndef __ALSA_CONTROL_H

#define __ALSA_CONTROL_H


#ifdef __cplusplus

extern "C" {

#endif


#define SND_CONTROL_DLSYM_VERSION   _dlsym_control_001


typedef struct snd_aes_iec958 {

    unsigned char status[24];

    unsigned char subcode[147];

    unsigned char pad;

    unsigned char dig_subframe[4];

} snd_aes_iec958_t;


typedef struct _snd_ctl_card_info snd_ctl_card_info_t;


typedef struct _snd_ctl_elem_id snd_ctl_elem_id_t;


typedef struct _snd_ctl_elem_list snd_ctl_elem_list_t;


typedef struct _snd_ctl_elem_info snd_ctl_elem_info_t;


typedef struct _snd_ctl_elem_value snd_ctl_elem_value_t;


typedef struct _snd_ctl_event snd_ctl_event_t;


typedef enum _snd_ctl_elem_type {

    SND_CTL_ELEM_TYPE_NONE = 0,

    SND_CTL_ELEM_TYPE_BOOLEAN,

    SND_CTL_ELEM_TYPE_INTEGER,

    SND_CTL_ELEM_TYPE_ENUMERATED,

    SND_CTL_ELEM_TYPE_BYTES,

    SND_CTL_ELEM_TYPE_IEC958,

    SND_CTL_ELEM_TYPE_INTEGER64,

    SND_CTL_ELEM_TYPE_LAST = SND_CTL_ELEM_TYPE_INTEGER64

} snd_ctl_elem_type_t;


typedef enum _snd_ctl_elem_iface {

    SND_CTL_ELEM_IFACE_CARD = 0,

    SND_CTL_ELEM_IFACE_HWDEP,

    SND_CTL_ELEM_IFACE_MIXER,

    SND_CTL_ELEM_IFACE_PCM,

    SND_CTL_ELEM_IFACE_RAWMIDI,

    SND_CTL_ELEM_IFACE_TIMER,

    SND_CTL_ELEM_IFACE_SEQUENCER,

    SND_CTL_ELEM_IFACE_LAST = SND_CTL_ELEM_IFACE_SEQUENCER

} snd_ctl_elem_iface_t;


typedef enum _snd_ctl_event_type {

    SND_CTL_EVENT_ELEM = 0,

    SND_CTL_EVENT_LAST = SND_CTL_EVENT_ELEM

}snd_ctl_event_type_t;


#define SND_CTL_EVENT_MASK_REMOVE   (~0U)

#define SND_CTL_EVENT_MASK_VALUE    (1<<0)

#define SND_CTL_EVENT_MASK_INFO     (1<<1)

#define SND_CTL_EVENT_MASK_ADD      (1<<2)

#define SND_CTL_EVENT_MASK_TLV      (1<<3)


#define SND_CTL_NAME_NONE               ""

#define SND_CTL_NAME_PLAYBACK               "Playback "

#define SND_CTL_NAME_CAPTURE                "Capture "


#define SND_CTL_NAME_IEC958_NONE            ""

#define SND_CTL_NAME_IEC958_SWITCH          "Switch"

#define SND_CTL_NAME_IEC958_VOLUME          "Volume"

#define SND_CTL_NAME_IEC958_DEFAULT         "Default"

#define SND_CTL_NAME_IEC958_MASK            "Mask"

#define SND_CTL_NAME_IEC958_CON_MASK            "Con Mask"

#define SND_CTL_NAME_IEC958_PRO_MASK            "Pro Mask"

#define SND_CTL_NAME_IEC958_PCM_STREAM          "PCM Stream"

#define SND_CTL_NAME_IEC958(expl,direction,what)    "IEC958 " expl SND_CTL_NAME_##direction SND_CTL_NAME_IEC958_##what


#define SND_CTL_POWER_MASK      0xff00

#define SND_CTL_POWER_D0            0x0000

#define SND_CTL_POWER_D1                0x0100

#define SND_CTL_POWER_D2            0x0200

#define SND_CTL_POWER_D3            0x0300

#define SND_CTL_POWER_D3hot     (SND_CTL_POWER_D3|0x0000)

#define SND_CTL_POWER_D3cold            (SND_CTL_POWER_D3|0x0001)


#define SND_CTL_TLVT_CONTAINER      0x0000

#define SND_CTL_TLVT_DB_SCALE       0x0001

#define SND_CTL_TLVT_DB_LINEAR      0x0002

#define SND_CTL_TLVT_DB_RANGE       0x0003

#define SND_CTL_TLVT_DB_MINMAX      0x0004

#define SND_CTL_TLVT_DB_MINMAX_MUTE 0x0005


#define SND_CTL_TLV_DB_GAIN_MUTE    -9999999


#define SND_CTL_TLVT_CHMAP_FIXED    0x00101

#define SND_CTL_TLVT_CHMAP_VAR      0x00102

#define SND_CTL_TLVT_CHMAP_PAIRED   0x00103


typedef enum _snd_ctl_type {

    SND_CTL_TYPE_HW,

    SND_CTL_TYPE_SHM,

    SND_CTL_TYPE_INET,

    SND_CTL_TYPE_EXT,

    SND_CTL_TYPE_REMAP,

} snd_ctl_type_t;


#define SND_CTL_NONBLOCK        0x0001


#define SND_CTL_ASYNC           0x0002


#define SND_CTL_READONLY        0x0004


#define SND_CTL_EINTR           0x0080


typedef struct _snd_ctl snd_ctl_t;


#define SND_SCTL_NOFREE         0x0001


typedef struct _snd_sctl snd_sctl_t;


int snd_card_load(int card);

int snd_card_next(int *card);

int snd_card_get_index(const char *name);

int snd_card_get_name(int card, char **name);

int snd_card_get_longname(int card, char **name);


int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode);

int snd_ctl_open_lconf(snd_ctl_t **ctl, const char *name, int mode, snd_config_t *lconf);

int snd_ctl_open_fallback(snd_ctl_t **ctl, snd_config_t *root, const char *name, const char *orig_name, int mode);

int snd_ctl_close(snd_ctl_t *ctl);

int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock);

static __inline__ int snd_ctl_abort(snd_ctl_t *ctl) { return snd_ctl_nonblock(ctl, 2); }

int snd_async_add_ctl_handler(snd_async_handler_t **handler, snd_ctl_t *ctl,

                  snd_async_callback_t callback, void *private_data);

snd_ctl_t *snd_async_handler_get_ctl(snd_async_handler_t *handler);

int snd_ctl_poll_descriptors_count(snd_ctl_t *ctl);

int snd_ctl_poll_descriptors(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space);

int snd_ctl_poll_descriptors_revents(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);

int snd_ctl_subscribe_events(snd_ctl_t *ctl, int subscribe);

int snd_ctl_card_info(snd_ctl_t *ctl, snd_ctl_card_info_t *info);

int snd_ctl_elem_list(snd_ctl_t *ctl, snd_ctl_elem_list_t *list);

int snd_ctl_elem_info(snd_ctl_t *ctl, snd_ctl_elem_info_t *info);

int snd_ctl_elem_read(snd_ctl_t *ctl, snd_ctl_elem_value_t *data);

int snd_ctl_elem_write(snd_ctl_t *ctl, snd_ctl_elem_value_t *data);

int snd_ctl_elem_lock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id);

int snd_ctl_elem_unlock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id);

int snd_ctl_elem_tlv_read(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,

              unsigned int *tlv, unsigned int tlv_size);

int snd_ctl_elem_tlv_write(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,

               const unsigned int *tlv);

int snd_ctl_elem_tlv_command(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,

                 const unsigned int *tlv);

#ifdef __ALSA_HWDEP_H

int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int * device);

int snd_ctl_hwdep_info(snd_ctl_t *ctl, snd_hwdep_info_t * info);

#endif

#ifdef __ALSA_PCM_H

int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int *device);

int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t * info);

int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev);

#endif

#ifdef __ALSA_RAWMIDI_H

int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int * device);

int snd_ctl_rawmidi_info(snd_ctl_t *ctl, snd_rawmidi_info_t * info);

int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev);

#endif

#ifdef __ALSA_UMP_H

int snd_ctl_ump_next_device(snd_ctl_t *ctl, int *device);

int snd_ctl_ump_endpoint_info(snd_ctl_t *ctl, snd_ump_endpoint_info_t *info);

int snd_ctl_ump_block_info(snd_ctl_t *ctl, snd_ump_block_info_t *info);

#endif

int snd_ctl_set_power_state(snd_ctl_t *ctl, unsigned int state);

int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state);


int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event);

int snd_ctl_wait(snd_ctl_t *ctl, int timeout);

const char *snd_ctl_name(snd_ctl_t *ctl);

snd_ctl_type_t snd_ctl_type(snd_ctl_t *ctl);


const char *snd_ctl_elem_type_name(snd_ctl_elem_type_t type);

const char *snd_ctl_elem_iface_name(snd_ctl_elem_iface_t iface);

const char *snd_ctl_event_type_name(snd_ctl_event_type_t type);


unsigned int snd_ctl_event_elem_get_mask(const snd_ctl_event_t *obj);

unsigned int snd_ctl_event_elem_get_numid(const snd_ctl_event_t *obj);

void snd_ctl_event_elem_get_id(const snd_ctl_event_t *obj, snd_ctl_elem_id_t *ptr);

snd_ctl_elem_iface_t snd_ctl_event_elem_get_interface(const snd_ctl_event_t *obj);

unsigned int snd_ctl_event_elem_get_device(const snd_ctl_event_t *obj);

unsigned int snd_ctl_event_elem_get_subdevice(const snd_ctl_event_t *obj);

const char *snd_ctl_event_elem_get_name(const snd_ctl_event_t *obj);

unsigned int snd_ctl_event_elem_get_index(const snd_ctl_event_t *obj);


int snd_ctl_elem_list_alloc_space(snd_ctl_elem_list_t *obj, unsigned int entries);

void snd_ctl_elem_list_free_space(snd_ctl_elem_list_t *obj);


char *snd_ctl_ascii_elem_id_get(snd_ctl_elem_id_t *id);

int snd_ctl_ascii_elem_id_parse(snd_ctl_elem_id_t *dst, const char *str);

int snd_ctl_ascii_value_parse(snd_ctl_t *handle,

                  snd_ctl_elem_value_t *dst,

                  snd_ctl_elem_info_t *info,

                  const char *value);


size_t snd_ctl_elem_id_sizeof(void);

#define snd_ctl_elem_id_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_id)

int snd_ctl_elem_id_malloc(snd_ctl_elem_id_t **ptr);

void snd_ctl_elem_id_free(snd_ctl_elem_id_t *obj);

void snd_ctl_elem_id_clear(snd_ctl_elem_id_t *obj);

void snd_ctl_elem_id_copy(snd_ctl_elem_id_t *dst, const snd_ctl_elem_id_t *src);

int snd_ctl_elem_id_compare_numid(const snd_ctl_elem_id_t *id1, const snd_ctl_elem_id_t *id2);

int snd_ctl_elem_id_compare_set(const snd_ctl_elem_id_t *id1, const snd_ctl_elem_id_t *id2);

unsigned int snd_ctl_elem_id_get_numid(const snd_ctl_elem_id_t *obj);

snd_ctl_elem_iface_t snd_ctl_elem_id_get_interface(const snd_ctl_elem_id_t *obj);

unsigned int snd_ctl_elem_id_get_device(const snd_ctl_elem_id_t *obj);

unsigned int snd_ctl_elem_id_get_subdevice(const snd_ctl_elem_id_t *obj);

const char *snd_ctl_elem_id_get_name(const snd_ctl_elem_id_t *obj);

unsigned int snd_ctl_elem_id_get_index(const snd_ctl_elem_id_t *obj);

void snd_ctl_elem_id_set_numid(snd_ctl_elem_id_t *obj, unsigned int val);

void snd_ctl_elem_id_set_interface(snd_ctl_elem_id_t *obj, snd_ctl_elem_iface_t val);

void snd_ctl_elem_id_set_device(snd_ctl_elem_id_t *obj, unsigned int val);

void snd_ctl_elem_id_set_subdevice(snd_ctl_elem_id_t *obj, unsigned int val);

void snd_ctl_elem_id_set_name(snd_ctl_elem_id_t *obj, const char *val);

void snd_ctl_elem_id_set_index(snd_ctl_elem_id_t *obj, unsigned int val);


size_t snd_ctl_card_info_sizeof(void);


#define snd_ctl_card_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_card_info)


int snd_ctl_card_info_malloc(snd_ctl_card_info_t **ptr);

void snd_ctl_card_info_free(snd_ctl_card_info_t *obj);

void snd_ctl_card_info_clear(snd_ctl_card_info_t *obj);

void snd_ctl_card_info_copy(snd_ctl_card_info_t *dst, const snd_ctl_card_info_t *src);

int snd_ctl_card_info_get_card(const snd_ctl_card_info_t *obj);

const char *snd_ctl_card_info_get_id(const snd_ctl_card_info_t *obj);

const char *snd_ctl_card_info_get_driver(const snd_ctl_card_info_t *obj);

const char *snd_ctl_card_info_get_name(const snd_ctl_card_info_t *obj);

const char *snd_ctl_card_info_get_longname(const snd_ctl_card_info_t *obj);

const char *snd_ctl_card_info_get_mixername(const snd_ctl_card_info_t *obj);

const char *snd_ctl_card_info_get_components(const snd_ctl_card_info_t *obj);


size_t snd_ctl_event_sizeof(void);

#define snd_ctl_event_alloca(ptr) __snd_alloca(ptr, snd_ctl_event)

int snd_ctl_event_malloc(snd_ctl_event_t **ptr);

void snd_ctl_event_free(snd_ctl_event_t *obj);

void snd_ctl_event_clear(snd_ctl_event_t *obj);

void snd_ctl_event_copy(snd_ctl_event_t *dst, const snd_ctl_event_t *src);

snd_ctl_event_type_t snd_ctl_event_get_type(const snd_ctl_event_t *obj);


size_t snd_ctl_elem_list_sizeof(void);


#define snd_ctl_elem_list_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_list)


int snd_ctl_elem_list_malloc(snd_ctl_elem_list_t **ptr);

void snd_ctl_elem_list_free(snd_ctl_elem_list_t *obj);

void snd_ctl_elem_list_clear(snd_ctl_elem_list_t *obj);

void snd_ctl_elem_list_copy(snd_ctl_elem_list_t *dst, const snd_ctl_elem_list_t *src);

void snd_ctl_elem_list_set_offset(snd_ctl_elem_list_t *obj, unsigned int val);

unsigned int snd_ctl_elem_list_get_used(const snd_ctl_elem_list_t *obj);

unsigned int snd_ctl_elem_list_get_count(const snd_ctl_elem_list_t *obj);

void snd_ctl_elem_list_get_id(const snd_ctl_elem_list_t *obj, unsigned int idx, snd_ctl_elem_id_t *ptr);

unsigned int snd_ctl_elem_list_get_numid(const snd_ctl_elem_list_t *obj, unsigned int idx);

snd_ctl_elem_iface_t snd_ctl_elem_list_get_interface(const snd_ctl_elem_list_t *obj, unsigned int idx);

unsigned int snd_ctl_elem_list_get_device(const snd_ctl_elem_list_t *obj, unsigned int idx);

unsigned int snd_ctl_elem_list_get_subdevice(const snd_ctl_elem_list_t *obj, unsigned int idx);

const char *snd_ctl_elem_list_get_name(const snd_ctl_elem_list_t *obj, unsigned int idx);

unsigned int snd_ctl_elem_list_get_index(const snd_ctl_elem_list_t *obj, unsigned int idx);


size_t snd_ctl_elem_info_sizeof(void);

#define snd_ctl_elem_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_info)

int snd_ctl_elem_info_malloc(snd_ctl_elem_info_t **ptr);

void snd_ctl_elem_info_free(snd_ctl_elem_info_t *obj);

void snd_ctl_elem_info_clear(snd_ctl_elem_info_t *obj);

void snd_ctl_elem_info_copy(snd_ctl_elem_info_t *dst, const snd_ctl_elem_info_t *src);

snd_ctl_elem_type_t snd_ctl_elem_info_get_type(const snd_ctl_elem_info_t *obj);

int snd_ctl_elem_info_is_readable(const snd_ctl_elem_info_t *obj);

int snd_ctl_elem_info_is_writable(const snd_ctl_elem_info_t *obj);

int snd_ctl_elem_info_is_volatile(const snd_ctl_elem_info_t *obj);

int snd_ctl_elem_info_is_inactive(const snd_ctl_elem_info_t *obj);

int snd_ctl_elem_info_is_locked(const snd_ctl_elem_info_t *obj);

int snd_ctl_elem_info_is_tlv_readable(const snd_ctl_elem_info_t *obj);

int snd_ctl_elem_info_is_tlv_writable(const snd_ctl_elem_info_t *obj);

int snd_ctl_elem_info_is_tlv_commandable(const snd_ctl_elem_info_t *obj);

int snd_ctl_elem_info_is_owner(const snd_ctl_elem_info_t *obj);

int snd_ctl_elem_info_is_user(const snd_ctl_elem_info_t *obj);

pid_t snd_ctl_elem_info_get_owner(const snd_ctl_elem_info_t *obj);

unsigned int snd_ctl_elem_info_get_count(const snd_ctl_elem_info_t *obj);

long snd_ctl_elem_info_get_min(const snd_ctl_elem_info_t *obj);

long snd_ctl_elem_info_get_max(const snd_ctl_elem_info_t *obj);

long snd_ctl_elem_info_get_step(const snd_ctl_elem_info_t *obj);

long long snd_ctl_elem_info_get_min64(const snd_ctl_elem_info_t *obj);

long long snd_ctl_elem_info_get_max64(const snd_ctl_elem_info_t *obj);

long long snd_ctl_elem_info_get_step64(const snd_ctl_elem_info_t *obj);

unsigned int snd_ctl_elem_info_get_items(const snd_ctl_elem_info_t *obj);

void snd_ctl_elem_info_set_item(snd_ctl_elem_info_t *obj, unsigned int val);

const char *snd_ctl_elem_info_get_item_name(const snd_ctl_elem_info_t *obj);

int snd_ctl_elem_info_get_dimensions(const snd_ctl_elem_info_t *obj);

int snd_ctl_elem_info_get_dimension(const snd_ctl_elem_info_t *obj, unsigned int idx);

int snd_ctl_elem_info_set_dimension(snd_ctl_elem_info_t *info,

                    const int dimension[4]);

void snd_ctl_elem_info_get_id(const snd_ctl_elem_info_t *obj, snd_ctl_elem_id_t *ptr);

unsigned int snd_ctl_elem_info_get_numid(const snd_ctl_elem_info_t *obj);

snd_ctl_elem_iface_t snd_ctl_elem_info_get_interface(const snd_ctl_elem_info_t *obj);

unsigned int snd_ctl_elem_info_get_device(const snd_ctl_elem_info_t *obj);

unsigned int snd_ctl_elem_info_get_subdevice(const snd_ctl_elem_info_t *obj);

const char *snd_ctl_elem_info_get_name(const snd_ctl_elem_info_t *obj);

unsigned int snd_ctl_elem_info_get_index(const snd_ctl_elem_info_t *obj);

void snd_ctl_elem_info_set_id(snd_ctl_elem_info_t *obj, const snd_ctl_elem_id_t *ptr);

void snd_ctl_elem_info_set_numid(snd_ctl_elem_info_t *obj, unsigned int val);

void snd_ctl_elem_info_set_interface(snd_ctl_elem_info_t *obj, snd_ctl_elem_iface_t val);

void snd_ctl_elem_info_set_device(snd_ctl_elem_info_t *obj, unsigned int val);

void snd_ctl_elem_info_set_subdevice(snd_ctl_elem_info_t *obj, unsigned int val);

void snd_ctl_elem_info_set_name(snd_ctl_elem_info_t *obj, const char *val);

void snd_ctl_elem_info_set_index(snd_ctl_elem_info_t *obj, unsigned int val);

void snd_ctl_elem_info_set_read_write(snd_ctl_elem_info_t *obj, int rval, int wval);

void snd_ctl_elem_info_set_tlv_read_write(snd_ctl_elem_info_t *obj, int rval, int wval);

void snd_ctl_elem_info_set_inactive(snd_ctl_elem_info_t *obj, int val);


int snd_ctl_add_integer_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info,

                 unsigned int element_count,

                 unsigned int member_count,

                 long min, long max, long step);

int snd_ctl_add_integer64_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info,

                   unsigned int element_count,

                   unsigned int member_count,

                   long long min, long long max,

                   long long step);

int snd_ctl_add_boolean_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info,

                 unsigned int element_count,

                 unsigned int member_count);

int snd_ctl_add_enumerated_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info,

                    unsigned int element_count,

                    unsigned int member_count,

                    unsigned int items,

                    const char *const labels[]);

int snd_ctl_add_bytes_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info,

                   unsigned int element_count,

                   unsigned int member_count);


int snd_ctl_elem_add_integer(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count, long imin, long imax, long istep);

int snd_ctl_elem_add_integer64(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count, long long imin, long long imax, long long istep);

int snd_ctl_elem_add_boolean(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count);

int snd_ctl_elem_add_enumerated(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count, unsigned int items, const char *const names[]);

int snd_ctl_elem_add_iec958(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id);

int snd_ctl_elem_remove(snd_ctl_t *ctl, snd_ctl_elem_id_t *id);


size_t snd_ctl_elem_value_sizeof(void);


#define snd_ctl_elem_value_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_value)


int snd_ctl_elem_value_malloc(snd_ctl_elem_value_t **ptr);

void snd_ctl_elem_value_free(snd_ctl_elem_value_t *obj);

void snd_ctl_elem_value_clear(snd_ctl_elem_value_t *obj);

void snd_ctl_elem_value_copy(snd_ctl_elem_value_t *dst, const snd_ctl_elem_value_t *src);

int snd_ctl_elem_value_compare(snd_ctl_elem_value_t *left, const snd_ctl_elem_value_t *right);

void snd_ctl_elem_value_get_id(const snd_ctl_elem_value_t *obj, snd_ctl_elem_id_t *ptr);

unsigned int snd_ctl_elem_value_get_numid(const snd_ctl_elem_value_t *obj);

snd_ctl_elem_iface_t snd_ctl_elem_value_get_interface(const snd_ctl_elem_value_t *obj);

unsigned int snd_ctl_elem_value_get_device(const snd_ctl_elem_value_t *obj);

unsigned int snd_ctl_elem_value_get_subdevice(const snd_ctl_elem_value_t *obj);

const char *snd_ctl_elem_value_get_name(const snd_ctl_elem_value_t *obj);

unsigned int snd_ctl_elem_value_get_index(const snd_ctl_elem_value_t *obj);

void snd_ctl_elem_value_set_id(snd_ctl_elem_value_t *obj, const snd_ctl_elem_id_t *ptr);

void snd_ctl_elem_value_set_numid(snd_ctl_elem_value_t *obj, unsigned int val);

void snd_ctl_elem_value_set_interface(snd_ctl_elem_value_t *obj, snd_ctl_elem_iface_t val);

void snd_ctl_elem_value_set_device(snd_ctl_elem_value_t *obj, unsigned int val);

void snd_ctl_elem_value_set_subdevice(snd_ctl_elem_value_t *obj, unsigned int val);

void snd_ctl_elem_value_set_name(snd_ctl_elem_value_t *obj, const char *val);

void snd_ctl_elem_value_set_index(snd_ctl_elem_value_t *obj, unsigned int val);

int snd_ctl_elem_value_get_boolean(const snd_ctl_elem_value_t *obj, unsigned int idx);

long snd_ctl_elem_value_get_integer(const snd_ctl_elem_value_t *obj, unsigned int idx);

long long snd_ctl_elem_value_get_integer64(const snd_ctl_elem_value_t *obj, unsigned int idx);

unsigned int snd_ctl_elem_value_get_enumerated(const snd_ctl_elem_value_t *obj, unsigned int idx);

unsigned char snd_ctl_elem_value_get_byte(const snd_ctl_elem_value_t *obj, unsigned int idx);

void snd_ctl_elem_value_set_boolean(snd_ctl_elem_value_t *obj, unsigned int idx, long val);

void snd_ctl_elem_value_set_integer(snd_ctl_elem_value_t *obj, unsigned int idx, long val);

void snd_ctl_elem_value_set_integer64(snd_ctl_elem_value_t *obj, unsigned int idx, long long val);

void snd_ctl_elem_value_set_enumerated(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned int val);

void snd_ctl_elem_value_set_byte(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned char val);

void snd_ctl_elem_set_bytes(snd_ctl_elem_value_t *obj, void *data, size_t size);

const void * snd_ctl_elem_value_get_bytes(const snd_ctl_elem_value_t *obj);

void snd_ctl_elem_value_get_iec958(const snd_ctl_elem_value_t *obj, snd_aes_iec958_t *ptr);

void snd_ctl_elem_value_set_iec958(snd_ctl_elem_value_t *obj, const snd_aes_iec958_t *ptr);


int snd_tlv_parse_dB_info(unsigned int *tlv, unsigned int tlv_size,

              unsigned int **db_tlvp);

int snd_tlv_get_dB_range(unsigned int *tlv, long rangemin, long rangemax,

             long *min, long *max);

int snd_tlv_convert_to_dB(unsigned int *tlv, long rangemin, long rangemax,

              long volume, long *db_gain);

int snd_tlv_convert_from_dB(unsigned int *tlv, long rangemin, long rangemax,

                long db_gain, long *value, int xdir);

int snd_ctl_get_dB_range(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,

             long *min, long *max);

int snd_ctl_convert_to_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,

              long volume, long *db_gain);

int snd_ctl_convert_from_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,

                long db_gain, long *value, int xdir);


typedef struct _snd_hctl_elem snd_hctl_elem_t;


typedef struct _snd_hctl snd_hctl_t;


typedef int (*snd_hctl_compare_t)(const snd_hctl_elem_t *e1,

                  const snd_hctl_elem_t *e2);

int snd_hctl_compare_fast(const snd_hctl_elem_t *c1,

              const snd_hctl_elem_t *c2);

typedef int (*snd_hctl_callback_t)(snd_hctl_t *hctl,

                   unsigned int mask,

                   snd_hctl_elem_t *elem);

typedef int (*snd_hctl_elem_callback_t)(snd_hctl_elem_t *elem,

                    unsigned int mask);


int snd_hctl_open(snd_hctl_t **hctl, const char *name, int mode);

int snd_hctl_open_ctl(snd_hctl_t **hctlp, snd_ctl_t *ctl);

int snd_hctl_close(snd_hctl_t *hctl);

int snd_hctl_nonblock(snd_hctl_t *hctl, int nonblock);

static __inline__ int snd_hctl_abort(snd_hctl_t *hctl) { return snd_hctl_nonblock(hctl, 2); }

int snd_hctl_poll_descriptors_count(snd_hctl_t *hctl);

int snd_hctl_poll_descriptors(snd_hctl_t *hctl, struct pollfd *pfds, unsigned int space);

int snd_hctl_poll_descriptors_revents(snd_hctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);

unsigned int snd_hctl_get_count(snd_hctl_t *hctl);

int snd_hctl_set_compare(snd_hctl_t *hctl, snd_hctl_compare_t hsort);

snd_hctl_elem_t *snd_hctl_first_elem(snd_hctl_t *hctl);

snd_hctl_elem_t *snd_hctl_last_elem(snd_hctl_t *hctl);

snd_hctl_elem_t *snd_hctl_find_elem(snd_hctl_t *hctl, const snd_ctl_elem_id_t *id);

void snd_hctl_set_callback(snd_hctl_t *hctl, snd_hctl_callback_t callback);

void snd_hctl_set_callback_private(snd_hctl_t *hctl, void *data);

void *snd_hctl_get_callback_private(snd_hctl_t *hctl);

int snd_hctl_load(snd_hctl_t *hctl);

int snd_hctl_free(snd_hctl_t *hctl);

int snd_hctl_handle_events(snd_hctl_t *hctl);

const char *snd_hctl_name(snd_hctl_t *hctl);

int snd_hctl_wait(snd_hctl_t *hctl, int timeout);

snd_ctl_t *snd_hctl_ctl(snd_hctl_t *hctl);


snd_hctl_elem_t *snd_hctl_elem_next(snd_hctl_elem_t *elem);

snd_hctl_elem_t *snd_hctl_elem_prev(snd_hctl_elem_t *elem);

int snd_hctl_elem_info(snd_hctl_elem_t *elem, snd_ctl_elem_info_t * info);

int snd_hctl_elem_read(snd_hctl_elem_t *elem, snd_ctl_elem_value_t * value);

int snd_hctl_elem_write(snd_hctl_elem_t *elem, snd_ctl_elem_value_t * value);

int snd_hctl_elem_tlv_read(snd_hctl_elem_t *elem, unsigned int *tlv, unsigned int tlv_size);

int snd_hctl_elem_tlv_write(snd_hctl_elem_t *elem, const unsigned int *tlv);

int snd_hctl_elem_tlv_command(snd_hctl_elem_t *elem, const unsigned int *tlv);


snd_hctl_t *snd_hctl_elem_get_hctl(snd_hctl_elem_t *elem);


void snd_hctl_elem_get_id(const snd_hctl_elem_t *obj, snd_ctl_elem_id_t *ptr);

unsigned int snd_hctl_elem_get_numid(const snd_hctl_elem_t *obj);

snd_ctl_elem_iface_t snd_hctl_elem_get_interface(const snd_hctl_elem_t *obj);

unsigned int snd_hctl_elem_get_device(const snd_hctl_elem_t *obj);

unsigned int snd_hctl_elem_get_subdevice(const snd_hctl_elem_t *obj);

const char *snd_hctl_elem_get_name(const snd_hctl_elem_t *obj);

unsigned int snd_hctl_elem_get_index(const snd_hctl_elem_t *obj);

void snd_hctl_elem_set_callback(snd_hctl_elem_t *obj, snd_hctl_elem_callback_t val);

void * snd_hctl_elem_get_callback_private(const snd_hctl_elem_t *obj);

void snd_hctl_elem_set_callback_private(snd_hctl_elem_t *obj, void * val);


int snd_sctl_build(snd_sctl_t **ctl, snd_ctl_t *handle, snd_config_t *config,

           snd_config_t *private_data, int mode);

int snd_sctl_free(snd_sctl_t *handle);

int snd_sctl_install(snd_sctl_t *handle);

int snd_sctl_remove(snd_sctl_t *handle);


int snd_device_name_hint(int card, const char *iface, void ***hints);

int snd_device_name_free_hint(void **hints);

char *snd_device_name_get_hint(const void *hint, const char *id);


#ifdef __cplusplus

}

#endif


#endif /* __ALSA_CONTROL_H */

snd_card_get_longname
int snd_card_get_longname(int card, char **name)
Obtain the card long name.
Definition cards.c:222

snd_card_next
int snd_card_next(int *rcard)
Iterate over physical sound cards.
Definition cards.c:108

snd_card_load
int snd_card_load(int card)
Try to load the driver for a card.
Definition cards.c:83

snd_card_get_index
int snd_card_get_index(const char *string)
Convert a card string to the card index.
Definition cards.c:140

snd_card_get_name
int snd_card_get_name(int card, char **name)
Obtain the card name.
Definition cards.c:192

snd_ctl_pcm_prefer_subdevice
int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev)
Set preferred PCM subdevice number of successive PCM open.
Definition control.c:1231

snd_ctl_elem_value_set_interface
void snd_ctl_elem_value_set_interface(snd_ctl_elem_value_t *obj, snd_ctl_elem_iface_t val)
Set the identifiers 'interface' part within the given element value.
Definition control.c:3380

snd_ctl_nonblock
int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock)
set nonblock mode
Definition control.c:256

snd_ctl_elem_value_set_byte
void snd_ctl_elem_value_set_byte(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned char val)
Set an element members value.
Definition control.c:3615

snd_ctl_elem_list_get_count
unsigned int snd_ctl_elem_list_get_count(const snd_ctl_elem_list_t *obj)
Get total count of elements present in CTL device.
Definition control.c:2466

snd_ctl_elem_list_clear
void snd_ctl_elem_list_clear(snd_ctl_elem_list_t *obj)
Clear given #snd_ctl_elem_list_t object.
Definition control.c:2406

snd_ctl_elem_id_free
void snd_ctl_elem_id_free(snd_ctl_elem_id_t *obj)
frees a previously allocated #snd_ctl_elem_id_t
Definition control.c:1903

snd_ctl_elem_info_get_type
snd_ctl_elem_type_t snd_ctl_elem_info_get_type(const snd_ctl_elem_info_t *obj)
Get type from a CTL element id/info.
Definition control.c:2620

snd_ctl_set_power_state
int snd_ctl_set_power_state(snd_ctl_t *ctl, unsigned int state)
Set Power State to given SND_CTL_POWER_* value and do the power management.
Definition control.c:1322

snd_ctl_elem_info_set_numid
void snd_ctl_elem_info_set_numid(snd_ctl_elem_info_t *obj, unsigned int val)
Set element numeric identifier of a CTL element id/info.
Definition control.c:3064

snd_ctl_card_info_get_card
int snd_ctl_card_info_get_card(const snd_ctl_card_info_t *obj)
Get the sound card index from the given info object.
Definition control.c:2198

snd_ctl_elem_info_get_dimensions
int snd_ctl_elem_info_get_dimensions(const snd_ctl_elem_info_t *obj)
Get count of dimensions for given element.
Definition control.c:2888

snd_ctl_elem_add_integer
int snd_ctl_elem_add_integer(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int member_count, long min, long max, long step)
Create and add an user-defined control element of integer type.
Definition control.c:867

snd_ctl_event_elem_get_mask
unsigned int snd_ctl_event_elem_get_mask(const snd_ctl_event_t *obj)
Get event mask for an element related event.
Definition control.c:1777

snd_ctl_elem_list_get_index
unsigned int snd_ctl_elem_list_get_index(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get index part of CTL element identifier for an entry of a CTL element identifiers list.
Definition control.c:2556

snd_ctl_elem_info_is_locked
int snd_ctl_elem_info_is_locked(const snd_ctl_elem_info_t *obj)
Get info whether an element is locked.
Definition control.c:2675

snd_ctl_elem_lock
int snd_ctl_elem_lock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Lock CTL element.
Definition control.c:1159

snd_ctl_elem_id_set_numid
void snd_ctl_elem_id_set_numid(snd_ctl_elem_id_t *obj, unsigned int val)
Set numeric identifier for a CTL element identifier.
Definition control.c:2064

snd_ctl_elem_info_get_dimension
int snd_ctl_elem_info_get_dimension(const snd_ctl_elem_info_t *obj, unsigned int idx)
Get specified of dimension width for given element.
Definition control.c:2917

snd_ctl_elem_value_sizeof
size_t snd_ctl_elem_value_sizeof()
Get size of data structure for an element.
Definition control.c:3169

snd_async_add_ctl_handler
int snd_async_add_ctl_handler(snd_async_handler_t **handler, snd_ctl_t *ctl, snd_async_callback_t callback, void *private_data)
Add an async handler for a CTL.
Definition control.c:1405

snd_ctl_elem_list_get_used
unsigned int snd_ctl_elem_list_get_used(const snd_ctl_elem_list_t *obj)
Get number of used entries in CTL element identifiers list.
Definition control.c:2448

snd_ctl_ump_next_device
int snd_ctl_ump_next_device(snd_ctl_t *ctl, int *device)
Get next UMP device number.
Definition control.c:1279

snd_ctl_event_get_type
snd_ctl_event_type_t snd_ctl_event_get_type(const snd_ctl_event_t *obj)
Get type of a CTL event.
Definition control.c:2345

snd_ctl_add_integer64_elem_set
int snd_ctl_add_integer64_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info, unsigned int element_count, unsigned int member_count, long long min, long long max, long long step)
Create and add some user-defined control elements of integer64 type.
Definition control.c:633

snd_ctl_event_malloc
int snd_ctl_event_malloc(snd_ctl_event_t **ptr)
allocate an invalid #snd_ctl_event_t using standard malloc
Definition control.c:2302

snd_ctl_elem_set_bytes
void snd_ctl_elem_set_bytes(snd_ctl_elem_value_t *obj, void *data, size_t size)
Replace the data stored within the element.
Definition control.c:3635

snd_ctl_elem_id_set_device
void snd_ctl_elem_id_set_device(snd_ctl_elem_id_t *obj, unsigned int val)
Set device part for a CTL element identifier.
Definition control.c:2086

snd_ctl_elem_value_set_device
void snd_ctl_elem_value_set_device(snd_ctl_elem_value_t *obj, unsigned int val)
Set the identifiers 'device' part within the given element value.
Definition control.c:3394

snd_ctl_elem_info_is_writable
int snd_ctl_elem_info_is_writable(const snd_ctl_elem_info_t *obj)
Get info about writability from a CTL element id/info.
Definition control.c:2642

snd_ctl_elem_id_set_interface
void snd_ctl_elem_id_set_interface(snd_ctl_elem_id_t *obj, snd_ctl_elem_iface_t val)
Set interface part for a CTL element identifier.
Definition control.c:2075

snd_ctl_elem_value_malloc
int snd_ctl_elem_value_malloc(snd_ctl_elem_value_t **ptr)
Allocate an invalid #snd_ctl_elem_value_t on the heap.
Definition control.c:3186

snd_ctl_elem_info_get_device
unsigned int snd_ctl_elem_info_get_device(const snd_ctl_elem_info_t *obj)
Get device part of CTL element identifier of a CTL element id/info.
Definition control.c:3009

snd_ctl_elem_tlv_command
int snd_ctl_elem_tlv_command(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, const unsigned int *tlv)
Process structured data from given buffer for an element set.
Definition control.c:1145

snd_ctl_elem_info_is_user
int snd_ctl_elem_info_is_user(const snd_ctl_elem_info_t *obj)
Get info if it's a user element.
Definition control.c:2697

snd_ctl_elem_info_get_step64
long long snd_ctl_elem_info_get_step64(const snd_ctl_elem_info_t *obj)
Get value step from a #SND_CTL_ELEM_TYPE_INTEGER64 CTL element id/info.
Definition control.c:2835

snd_ctl_elem_iface_name
const char * snd_ctl_elem_iface_name(snd_ctl_elem_iface_t iface)
get name of a CTL element related interface
Definition control.c:1717

snd_ctl_rawmidi_next_device
int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int *device)
Get next RawMidi device number.
Definition control.c:1243

snd_ctl_elem_info_sizeof
size_t snd_ctl_elem_info_sizeof()
get size of #snd_ctl_elem_info_t
Definition control.c:2567

snd_ctl_elem_info_is_inactive
int snd_ctl_elem_info_is_inactive(const snd_ctl_elem_info_t *obj)
Get info about status from a CTL element id/info.
Definition control.c:2664

snd_ctl_elem_info_get_name
const char * snd_ctl_elem_info_get_name(const snd_ctl_elem_info_t *obj)
Get name part of CTL element identifier of a CTL element id/info.
Definition control.c:3031

snd_ctl_read
int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event)
Read an event.
Definition control.c:1350

snd_ctl_card_info_clear
void snd_ctl_card_info_clear(snd_ctl_card_info_t *obj)
Clear given card info object.
Definition control.c:2173

snd_ctl_elem_value_set_index
void snd_ctl_elem_value_set_index(snd_ctl_elem_value_t *obj, unsigned int val)
Set the identifiers 'index' part within the given element value.
Definition control.c:3436

snd_ctl_elem_info_set_item
void snd_ctl_elem_info_set_item(snd_ctl_elem_info_t *obj, unsigned int val)
Select item in a #SND_CTL_ELEM_TYPE_ENUMERATED CTL element id/info.
Definition control.c:2859

snd_ctl_card_info_get_components
const char * snd_ctl_card_info_get_components(const snd_ctl_card_info_t *obj)
Get the sound cards "components" property from the given info object.
Definition control.c:2282

snd_ctl_elem_value_get_integer64
long long snd_ctl_elem_value_get_integer64(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get an element members value.
Definition control.c:3489

snd_ctl_elem_info_set_name
void snd_ctl_elem_info_set_name(snd_ctl_elem_info_t *obj, const char *val)
Set name part of CTL element identifier of a CTL element id/info.
Definition control.c:3108

snd_ctl_elem_id_copy
void snd_ctl_elem_id_copy(snd_ctl_elem_id_t *dst, const snd_ctl_elem_id_t *src)
copy one #snd_ctl_elem_id_t to another
Definition control.c:1922

snd_ctl_elem_value_get_numid
unsigned int snd_ctl_elem_value_get_numid(const snd_ctl_elem_value_t *obj)
Get the identifiers 'numid' part from the given element value.
Definition control.c:3267

snd_ctl_card_info_get_id
const char * snd_ctl_card_info_get_id(const snd_ctl_card_info_t *obj)
Get the sound card ID from the given info object.
Definition control.c:2212

snd_ctl_elem_info_get_index
unsigned int snd_ctl_elem_info_get_index(const snd_ctl_elem_info_t *obj)
Get index part of CTL element identifier of a CTL element id/info.
Definition control.c:3042

snd_ctl_elem_info_set_interface
void snd_ctl_elem_info_set_interface(snd_ctl_elem_info_t *obj, snd_ctl_elem_iface_t val)
Set interface part of CTL element identifier of a CTL element id/info.
Definition control.c:3075

snd_ctl_event_elem_get_name
const char * snd_ctl_event_elem_get_name(const snd_ctl_event_t *obj)
Get name part of CTL element identifier for an element related event.
Definition control.c:1849

snd_ctl_card_info_get_name
const char * snd_ctl_card_info_get_name(const snd_ctl_card_info_t *obj)
Get the sound card name from the given info object.
Definition control.c:2240

snd_ctl_elem_info_clear
void snd_ctl_elem_info_clear(snd_ctl_elem_info_t *obj)
clear given #snd_ctl_elem_info_t object
Definition control.c:2599

snd_ctl_hwdep_info
int snd_ctl_hwdep_info(snd_ctl_t *ctl, snd_hwdep_info_t *info)
Get info about a hardware dependent device.
Definition control.c:1195

snd_ctl_elem_info_get_id
void snd_ctl_elem_info_get_id(const snd_ctl_elem_info_t *obj, snd_ctl_elem_id_t *ptr)
Get CTL element identifier of a CTL element id/info.
Definition control.c:2976

snd_ctl_elem_list_alloc_space
int snd_ctl_elem_list_alloc_space(snd_ctl_elem_list_t *obj, unsigned int entries)
allocate space for CTL element identifiers list
Definition control.c:1745

snd_ctl_card_info_malloc
int snd_ctl_card_info_malloc(snd_ctl_card_info_t **ptr)
Allocate an invalid #snd_ctl_card_info_t on the heap.
Definition control.c:2146

snd_ctl_elem_info_malloc
int snd_ctl_elem_info_malloc(snd_ctl_elem_info_t **ptr)
allocate an invalid #snd_ctl_elem_info_t using standard malloc
Definition control.c:2577

snd_ctl_elem_id_get_numid
unsigned int snd_ctl_elem_id_get_numid(const snd_ctl_elem_id_t *obj)
Get numeric identifier from a CTL element identifier.
Definition control.c:1998

snd_ctl_elem_id_get_device
unsigned int snd_ctl_elem_id_get_device(const snd_ctl_elem_id_t *obj)
Get device part of a CTL element identifier.
Definition control.c:2020

snd_ctl_elem_add_iec958
int snd_ctl_elem_add_iec958(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id)
Create and add a user-defined control element of IEC958 type.
Definition control.c:973

snd_ctl_elem_info_set_read_write
void snd_ctl_elem_info_set_read_write(snd_ctl_elem_info_t *obj, int rval, int wval)
Set readability/writeability parameter of a CTL element id/info.
Definition control.c:3131

snd_ctl_elem_value_copy
void snd_ctl_elem_value_copy(snd_ctl_elem_value_t *dst, const snd_ctl_elem_value_t *src)
Bitwise copy of a snd_ctl_elem_value_t value.
Definition control.c:3223

snd_ctl_elem_tlv_read
int snd_ctl_elem_tlv_read(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int *tlv, unsigned int tlv_size)
Read structured data from an element set to given buffer.
Definition control.c:1083

snd_ctl_elem_value_get_byte
unsigned char snd_ctl_elem_value_get_byte(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get an element members value.
Definition control.c:3525

snd_ctl_elem_value_get_name
const char * snd_ctl_elem_value_get_name(const snd_ctl_elem_value_t *obj)
Get the identifiers 'name' part from the given element value.
Definition control.c:3323

snd_ctl_elem_list_get_name
const char * snd_ctl_elem_list_get_name(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get name part of CTL element identifier for an entry of a CTL element identifiers list.
Definition control.c:2543

snd_ctl_elem_value_clear
void snd_ctl_elem_value_clear(snd_ctl_elem_value_t *obj)
Clear given data of an element.
Definition control.c:3213

snd_ctl_elem_info_get_min64
long long snd_ctl_elem_info_get_min64(const snd_ctl_elem_info_t *obj)
Get minimum value from a #SND_CTL_ELEM_TYPE_INTEGER64 CTL element id/info.
Definition control.c:2811

snd_ctl_open_lconf
int snd_ctl_open_lconf(snd_ctl_t **ctlp, const char *name, int mode, snd_config_t *lconf)
Opens a CTL using local configuration.
Definition control.c:1641

snd_ctl_elem_id_get_subdevice
unsigned int snd_ctl_elem_id_get_subdevice(const snd_ctl_elem_id_t *obj)
Get subdevice part of a CTL element identifier.
Definition control.c:2031

snd_ctl_rawmidi_info
int snd_ctl_rawmidi_info(snd_ctl_t *ctl, snd_rawmidi_info_t *info)
Get info about a RawMidi device.
Definition control.c:1255

snd_ctl_elem_add_integer64
int snd_ctl_elem_add_integer64(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int member_count, long long min, long long max, long long step)
Create and add an user-defined control element of integer64 type.
Definition control.c:888

snd_ctl_card_info_free
void snd_ctl_card_info_free(snd_ctl_card_info_t *obj)
Free an #snd_ctl_card_info_t previously allocated using snd_ctl_card_info_malloc().
Definition control.c:2161

snd_ctl_event_free
void snd_ctl_event_free(snd_ctl_event_t *obj)
frees a previously allocated #snd_ctl_event_t
Definition control.c:2315

snd_ctl_elem_read
int snd_ctl_elem_read(snd_ctl_t *ctl, snd_ctl_elem_value_t *data)
Get CTL element value.
Definition control.c:1013

snd_ctl_elem_id_set_index
void snd_ctl_elem_id_set_index(snd_ctl_elem_id_t *obj, unsigned int val)
Set index part for a CTL element identifier.
Definition control.c:2119

snd_async_handler_get_ctl
snd_ctl_t * snd_async_handler_get_ctl(snd_async_handler_t *handler)
Return CTL handle related to an async handler.
Definition control.c:1435

snd_ctl_elem_id_get_interface
snd_ctl_elem_iface_t snd_ctl_elem_id_get_interface(const snd_ctl_elem_id_t *obj)
Get interface part of a CTL element identifier.
Definition control.c:2009

snd_ctl_event_copy
void snd_ctl_event_copy(snd_ctl_event_t *dst, const snd_ctl_event_t *src)
copy one #snd_ctl_event_t to another
Definition control.c:2334

snd_ctl_elem_info_get_max
long snd_ctl_elem_info_get_max(const snd_ctl_elem_info_t *obj)
Get maximum value from a #SND_CTL_ELEM_TYPE_INTEGER CTL element id/info.
Definition control.c:2787

snd_ctl_elem_list_get_numid
unsigned int snd_ctl_elem_list_get_numid(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get CTL element numeric identifier for an entry of a CTL element identifiers list.
Definition control.c:2491

snd_ctl_elem_remove
int snd_ctl_elem_remove(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Remove an user CTL element.
Definition control.c:992

snd_ctl_elem_list_get_interface
snd_ctl_elem_iface_t snd_ctl_elem_list_get_interface(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get interface part of CTL element identifier for an entry of a CTL element identifiers list.
Definition control.c:2504

snd_ctl_ump_endpoint_info
int snd_ctl_ump_endpoint_info(snd_ctl_t *ctl, snd_ump_endpoint_info_t *info)
Get UMP Endpoint info about a UMP RawMidi device.
Definition control.c:1293

snd_ctl_elem_list_get_id
void snd_ctl_elem_list_get_id(const snd_ctl_elem_list_t *obj, unsigned int idx, snd_ctl_elem_id_t *ptr)
Get CTL element identifier for an entry of a CTL element identifiers list.
Definition control.c:2478

snd_ctl_elem_info_is_tlv_commandable
int snd_ctl_elem_info_is_tlv_commandable(const snd_ctl_elem_info_t *obj)
Get info about TLV command possibility from a CTL element id/info.
Definition control.c:2730

snd_ctl_elem_info_copy
void snd_ctl_elem_info_copy(snd_ctl_elem_info_t *dst, const snd_ctl_elem_info_t *src)
copy one #snd_ctl_elem_info_t to another
Definition control.c:2609

snd_ctl_elem_info_get_item_name
const char * snd_ctl_elem_info_get_item_name(const snd_ctl_elem_info_t *obj)
Get name for selected item in a #SND_CTL_ELEM_TYPE_ENUMERATED CTL element id/info.
Definition control.c:2870

snd_ctl_event_clear
void snd_ctl_event_clear(snd_ctl_event_t *obj)
clear given #snd_ctl_event_t object
Definition control.c:2324

snd_ctl_elem_value_get_index
unsigned int snd_ctl_elem_value_get_index(const snd_ctl_elem_value_t *obj)
Get the identifiers 'index' part from the given element value.
Definition control.c:3337

snd_ctl_elem_value_set_name
void snd_ctl_elem_value_set_name(snd_ctl_elem_value_t *obj, const char *val)
Set the identifiers 'name' part within the given element value.
Definition control.c:3422

snd_ctl_elem_info_set_tlv_read_write
void snd_ctl_elem_info_set_tlv_read_write(snd_ctl_elem_info_t *obj, int rval, int wval)
Set TLV readability/writeability parameter of a CTL element id/info.
Definition control.c:3145

snd_ctl_elem_info_is_volatile
int snd_ctl_elem_info_is_volatile(const snd_ctl_elem_info_t *obj)
Get info about notification feasibility from a CTL element id/info.
Definition control.c:2653

snd_ctl_elem_info_is_owner
int snd_ctl_elem_info_is_owner(const snd_ctl_elem_info_t *obj)
Get info if I own an element.
Definition control.c:2686

snd_ctl_wait
int snd_ctl_wait(snd_ctl_t *ctl, int timeout)
Wait for a CTL to become ready (i.e. at least one event pending)
Definition control.c:1362

snd_ctl_elem_info_get_max64
long long snd_ctl_elem_info_get_max64(const snd_ctl_elem_info_t *obj)
Get maximum value from a #SND_CTL_ELEM_TYPE_INTEGER64 CTL element id/info.
Definition control.c:2823

snd_ctl_elem_list_free_space
void snd_ctl_elem_list_free_space(snd_ctl_elem_list_t *obj)
free previously allocated space for CTL element identifiers list
Definition control.c:1765

snd_ctl_elem_list_get_subdevice
unsigned int snd_ctl_elem_list_get_subdevice(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get subdevice part of CTL element identifier for an entry of a CTL element identifiers list.
Definition control.c:2530

snd_ctl_elem_id_set_name
void snd_ctl_elem_id_set_name(snd_ctl_elem_id_t *obj, const char *val)
Set name part for a CTL element identifier.
Definition control.c:2108

snd_ctl_elem_value_get_subdevice
unsigned int snd_ctl_elem_value_get_subdevice(const snd_ctl_elem_value_t *obj)
Get the identifiers 'subdevice' part from the given element value.
Definition control.c:3309

snd_ctl_event_elem_get_id
void snd_ctl_event_elem_get_id(const snd_ctl_event_t *obj, snd_ctl_elem_id_t *ptr)
Get CTL element identifier for an element related event.
Definition control.c:1789

snd_ctl_name
const char * snd_ctl_name(snd_ctl_t *ctl)
get identifier of CTL handle
Definition control.c:209

snd_ctl_elem_info_get_step
long snd_ctl_elem_info_get_step(const snd_ctl_elem_info_t *obj)
Get value step from a #SND_CTL_ELEM_TYPE_INTEGER CTL element id/info.
Definition control.c:2799

snd_ctl_elem_info_set_device
void snd_ctl_elem_info_set_device(snd_ctl_elem_info_t *obj, unsigned int val)
Set device part of CTL element identifier of a CTL element id/info.
Definition control.c:3086

snd_ctl_elem_value_get_integer
long snd_ctl_elem_value_get_integer(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get an element members value.
Definition control.c:3471

snd_ctl_elem_value_get_iec958
void snd_ctl_elem_value_get_iec958(const snd_ctl_elem_value_t *obj, snd_aes_iec958_t *ptr)
Get an elements IEC958 data.
Definition control.c:3672

snd_ctl_elem_value_set_enumerated
void snd_ctl_elem_value_set_enumerated(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned int val)
Set an element members value.
Definition control.c:3597

snd_ctl_elem_info_set_id
void snd_ctl_elem_info_set_id(snd_ctl_elem_info_t *obj, const snd_ctl_elem_id_t *ptr)
Set CTL element identifier of a CTL element id/info.
Definition control.c:3053

snd_ctl_elem_value_set_numid
void snd_ctl_elem_value_set_numid(snd_ctl_elem_value_t *obj, unsigned int val)
Set the identifiers 'numid' part within the given element value.
Definition control.c:3366

snd_ctl_elem_info_free
void snd_ctl_elem_info_free(snd_ctl_elem_info_t *obj)
frees a previously allocated #snd_ctl_elem_info_t
Definition control.c:2590

snd_ctl_elem_id_set_subdevice
void snd_ctl_elem_id_set_subdevice(snd_ctl_elem_id_t *obj, unsigned int val)
Set subdevice part for a CTL element identifier.
Definition control.c:2097

snd_ctl_elem_list_free
void snd_ctl_elem_list_free(snd_ctl_elem_list_t *obj)
frees a previously allocated #snd_ctl_elem_list_t.
Definition control.c:2389

snd_ctl_ump_block_info
int snd_ctl_ump_block_info(snd_ctl_t *ctl, snd_ump_block_info_t *info)
Get UMP Block info about a UMP RawMidi device.
Definition control.c:1308

snd_ctl_elem_info_get_owner
pid_t snd_ctl_elem_info_get_owner(const snd_ctl_elem_info_t *obj)
Get owner of a locked element.
Definition control.c:2753

snd_ctl_elem_id_get_name
const char * snd_ctl_elem_id_get_name(const snd_ctl_elem_id_t *obj)
Get name part of a CTL element identifier.
Definition control.c:2042

snd_ctl_add_enumerated_elem_set
int snd_ctl_add_enumerated_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info, unsigned int element_count, unsigned int member_count, unsigned int items, const char *const labels[])
Create and add some user-defined control elements of enumerated type.
Definition control.c:768

snd_ctl_elem_value_set_boolean
void snd_ctl_elem_value_set_boolean(snd_ctl_elem_value_t *obj, unsigned int idx, long val)
Set an element members value.
Definition control.c:3543

snd_ctl_elem_id_malloc
int snd_ctl_elem_id_malloc(snd_ctl_elem_id_t **ptr)
allocate an invalid #snd_ctl_elem_id_t using standard malloc
Definition control.c:1890

snd_ctl_hwdep_next_device
int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int *device)
Get next hardware dependent device number.
Definition control.c:1183

snd_ctl_elem_value_get_interface
snd_ctl_elem_iface_t snd_ctl_elem_value_get_interface(const snd_ctl_elem_value_t *obj)
Get the identifiers 'interface' part from the given element value.
Definition control.c:3281

snd_ctl_elem_info
int snd_ctl_elem_info(snd_ctl_t *ctl, snd_ctl_elem_info_t *info)
Get CTL element information.
Definition control.c:425

snd_ctl_elem_value_get_boolean
int snd_ctl_elem_value_get_boolean(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get an element members value.
Definition control.c:3453

snd_ctl_elem_id_compare_set
int snd_ctl_elem_id_compare_set(const snd_ctl_elem_id_t *id1, const snd_ctl_elem_id_t *id2)
compare one #snd_ctl_elem_id_t to another
Definition control.c:1969

snd_ctl_elem_value_set_subdevice
void snd_ctl_elem_value_set_subdevice(snd_ctl_elem_value_t *obj, unsigned int val)
Set the identifiers 'subdevice' part within the given element value.
Definition control.c:3408

snd_ctl_elem_info_get_count
unsigned int snd_ctl_elem_info_get_count(const snd_ctl_elem_info_t *obj)
Get number of value entries from a CTL element id/info.
Definition control.c:2764

snd_ctl_event_elem_get_subdevice
unsigned int snd_ctl_event_elem_get_subdevice(const snd_ctl_event_t *obj)
Get subdevice part of CTL element identifier for an element related event.
Definition control.c:1837

snd_ctl_elem_tlv_write
int snd_ctl_elem_tlv_write(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, const unsigned int *tlv)
Write structured data from given buffer to an element set.
Definition control.c:1120

snd_ctl_card_info
int snd_ctl_card_info(snd_ctl_t *ctl, snd_ctl_card_info_t *info)
Get information about the sound card.
Definition control.c:385

snd_ctl_elem_value_free
void snd_ctl_elem_value_free(snd_ctl_elem_value_t *obj)
Free an #snd_ctl_elem_value_t previously allocated using snd_ctl_elem_value_malloc().
Definition control.c:3201

snd_ctl_elem_info_is_tlv_readable
int snd_ctl_elem_info_is_tlv_readable(const snd_ctl_elem_info_t *obj)
Get info about TLV readability from a CTL element id/info.
Definition control.c:2708

snd_ctl_poll_descriptors
int snd_ctl_poll_descriptors(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space)
get poll descriptors
Definition control.c:326

snd_ctl_elem_value_set_id
void snd_ctl_elem_value_set_id(snd_ctl_elem_value_t *obj, const snd_ctl_elem_id_t *ptr)
Set the element identifier within the given element value.
Definition control.c:3352

snd_ctl_elem_info_set_subdevice
void snd_ctl_elem_info_set_subdevice(snd_ctl_elem_info_t *obj, unsigned int val)
Set subdevice part of CTL element identifier of a CTL element id/info.
Definition control.c:3097

snd_ctl_poll_descriptors_revents
int snd_ctl_poll_descriptors_revents(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents)
get returned events from poll descriptors
Definition control.c:349

snd_ctl_subscribe_events
int snd_ctl_subscribe_events(snd_ctl_t *ctl, int subscribe)
Ask to be informed about events (poll, snd_async_add_ctl_handler, snd_ctl_read)
Definition control.c:367

snd_ctl_elem_list_malloc
int snd_ctl_elem_list_malloc(snd_ctl_elem_list_t **ptr)
allocate a #snd_ctl_elem_list_t using standard malloc.
Definition control.c:2368

snd_ctl_elem_type_name
const char * snd_ctl_elem_type_name(snd_ctl_elem_type_t type)
get name of a CTL element type
Definition control.c:1706

snd_ctl_elem_list
int snd_ctl_elem_list(snd_ctl_t *ctl, snd_ctl_elem_list_t *list)
Get a list of element identifiers.
Definition control.c:412

snd_ctl_elem_list_copy
void snd_ctl_elem_list_copy(snd_ctl_elem_list_t *dst, const snd_ctl_elem_list_t *src)
copy one #snd_ctl_elem_list_t to another.
Definition control.c:2420

snd_ctl_open
int snd_ctl_open(snd_ctl_t **ctlp, const char *name, int mode)
Opens a sound card.
Definition control.c:1613

snd_ctl_elem_value_get_bytes
const void * snd_ctl_elem_value_get_bytes(const snd_ctl_elem_value_t *obj)
Get the data stored within the element.
Definition control.c:3654

snd_ctl_elem_add_enumerated
int snd_ctl_elem_add_enumerated(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int member_count, unsigned int items, const char *const labels[])
Create and add a user-defined control element of enumerated type.
Definition control.c:930

snd_ctl_elem_info_is_readable
int snd_ctl_elem_info_is_readable(const snd_ctl_elem_info_t *obj)
Get info about readability from a CTL element id/info.
Definition control.c:2631

snd_ctl_elem_info_get_items
unsigned int snd_ctl_elem_info_get_items(const snd_ctl_elem_info_t *obj)
Get number of items available from a #SND_CTL_ELEM_TYPE_ENUMERATED CTL element id/info.
Definition control.c:2847

snd_ctl_elem_value_set_integer
void snd_ctl_elem_value_set_integer(snd_ctl_elem_value_t *obj, unsigned int idx, long val)
Set an element members value.
Definition control.c:3561

snd_ctl_elem_info_get_numid
unsigned int snd_ctl_elem_info_get_numid(const snd_ctl_elem_info_t *obj)
Get element numeric identifier of a CTL element id/info.
Definition control.c:2987

snd_ctl_elem_info_get_interface
snd_ctl_elem_iface_t snd_ctl_elem_info_get_interface(const snd_ctl_elem_info_t *obj)
Get interface part of CTL element identifier of a CTL element id/info.
Definition control.c:2998

snd_ctl_elem_value_get_device
unsigned int snd_ctl_elem_value_get_device(const snd_ctl_elem_value_t *obj)
Get the identifiers 'device' part from the given element value.
Definition control.c:3295

snd_ctl_card_info_copy
void snd_ctl_card_info_copy(snd_ctl_card_info_t *dst, const snd_ctl_card_info_t *src)
Bitwise copy of a #snd_ctl_card_info_t object.
Definition control.c:2184

snd_ctl_pcm_info
int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t *info)
Get info about a PCM device.
Definition control.c:1219

snd_ctl_elem_info_get_min
long snd_ctl_elem_info_get_min(const snd_ctl_elem_info_t *obj)
Get minimum value from a #SND_CTL_ELEM_TYPE_INTEGER CTL element id/info.
Definition control.c:2775

snd_ctl_elem_write
int snd_ctl_elem_write(snd_ctl_t *ctl, snd_ctl_elem_value_t *data)
Set CTL element value.
Definition control.c:1034

snd_ctl_elem_info_set_index
void snd_ctl_elem_info_set_index(snd_ctl_elem_info_t *obj, unsigned int val)
Set index part of CTL element identifier of a CTL element id/info.
Definition control.c:3119

snd_ctl_add_integer_elem_set
int snd_ctl_add_integer_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info, unsigned int element_count, unsigned int member_count, long min, long max, long step)
Create and add some user-defined control elements of integer type.
Definition control.c:551

snd_ctl_pcm_next_device
int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int *device)
Get next PCM device number.
Definition control.c:1207

snd_ctl_elem_info_is_tlv_writable
int snd_ctl_elem_info_is_tlv_writable(const snd_ctl_elem_info_t *obj)
Get info about TLV writeability from a CTL element id/info.
Definition control.c:2719

snd_ctl_elem_id_clear
void snd_ctl_elem_id_clear(snd_ctl_elem_id_t *obj)
clear given #snd_ctl_elem_id_t object
Definition control.c:1912

snd_ctl_card_info_get_driver
const char * snd_ctl_card_info_get_driver(const snd_ctl_card_info_t *obj)
Get the sound card driver from the given info object.
Definition control.c:2226

snd_ctl_elem_value_get_id
void snd_ctl_elem_value_get_id(const snd_ctl_elem_value_t *obj, snd_ctl_elem_id_t *ptr)
Get the element identifier from the given element value.
Definition control.c:3253

snd_ctl_elem_value_compare
int snd_ctl_elem_value_compare(snd_ctl_elem_value_t *left, const snd_ctl_elem_value_t *right)
Compare two snd_ctl_elem_value_t values, bytewise.
Definition control.c:3237

snd_ctl_poll_descriptors_count
int snd_ctl_poll_descriptors_count(snd_ctl_t *ctl)
get count of poll descriptors for CTL handle
Definition control.c:309

snd_ctl_elem_info_set_inactive
void snd_ctl_elem_info_set_inactive(snd_ctl_elem_info_t *obj, int val)
Set inactive parameter of a CTL element id/info.
Definition control.c:3158

snd_ctl_elem_list_set_offset
void snd_ctl_elem_list_set_offset(snd_ctl_elem_list_t *obj, unsigned int val)
Set index of first wanted CTL element identifier in a CTL element identifiers list.
Definition control.c:2431

snd_ctl_rawmidi_prefer_subdevice
int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev)
Set preferred RawMidi subdevice number of successive RawMidi open.
Definition control.c:1267

snd_ctl_elem_id_sizeof
size_t snd_ctl_elem_id_sizeof()
get size of #snd_ctl_elem_id_t
Definition control.c:1880

snd_ctl_event_elem_get_numid
unsigned int snd_ctl_event_elem_get_numid(const snd_ctl_event_t *obj)
Get element numeric identifier for an element related event.
Definition control.c:1801

snd_ctl_elem_info_get_subdevice
unsigned int snd_ctl_elem_info_get_subdevice(const snd_ctl_elem_info_t *obj)
Get subdevice part of CTL element identifier of a CTL element id/info.
Definition control.c:3020

snd_ctl_get_power_state
int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state)
Get actual Power State.
Definition control.c:1336

snd_ctl_elem_id_compare_numid
int snd_ctl_elem_id_compare_numid(const snd_ctl_elem_id_t *id1, const snd_ctl_elem_id_t *id2)
compare one #snd_ctl_elem_id_t to another using numid
Definition control.c:1939

snd_ctl_event_elem_get_index
unsigned int snd_ctl_event_elem_get_index(const snd_ctl_event_t *obj)
Get index part of CTL element identifier for an element related event.
Definition control.c:1861

snd_ctl_elem_list_get_device
unsigned int snd_ctl_elem_list_get_device(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get the device part of CTL element identifier for an entry of a CTL element identifiers list.
Definition control.c:2517

snd_ctl_open_fallback
int snd_ctl_open_fallback(snd_ctl_t **ctlp, snd_config_t *root, const char *name, const char *orig_name, int mode)
Opens a fallback CTL.
Definition control.c:1657

snd_ctl_elem_id_get_index
unsigned int snd_ctl_elem_id_get_index(const snd_ctl_elem_id_t *obj)
Get index part of a CTL element identifier.
Definition control.c:2053

snd_ctl_event_sizeof
size_t snd_ctl_event_sizeof()
get size of #snd_ctl_event_t
Definition control.c:2292

snd_ctl_event_elem_get_interface
snd_ctl_elem_iface_t snd_ctl_event_elem_get_interface(const snd_ctl_event_t *obj)
Get interface part of CTL element identifier for an element related event.
Definition control.c:1813

snd_ctl_card_info_get_longname
const char * snd_ctl_card_info_get_longname(const snd_ctl_card_info_t *obj)
Get the sound cards long name from the given info object.
Definition control.c:2254

snd_ctl_elem_list_sizeof
size_t snd_ctl_elem_list_sizeof()
get size of #snd_ctl_elem_list_t.
Definition control.c:2355

snd_ctl_elem_value_set_integer64
void snd_ctl_elem_value_set_integer64(snd_ctl_elem_value_t *obj, unsigned int idx, long long val)
Set an element members value.
Definition control.c:3579

snd_ctl_elem_value_set_iec958
void snd_ctl_elem_value_set_iec958(snd_ctl_elem_value_t *obj, const snd_aes_iec958_t *ptr)
Set an elements IEC958 data.
Definition control.c:3690

snd_ctl_card_info_sizeof
size_t snd_ctl_card_info_sizeof()
get size of #snd_ctl_card_info_t.
Definition control.c:2129

snd_ctl_elem_info_set_dimension
int snd_ctl_elem_info_set_dimension(snd_ctl_elem_info_t *info, const int dimension[4])
Set width to a specified dimension level of given element information.
Definition control.c:2949

snd_ctl_elem_add_boolean
int snd_ctl_elem_add_boolean(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int member_count)
Create and add an user-defined control element of boolean type.
Definition control.c:909

snd_ctl_add_bytes_elem_set
int snd_ctl_add_bytes_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info, unsigned int element_count, unsigned int member_count)
Create and add some user-defined control elements of bytes type.
Definition control.c:848

snd_ctl_elem_value_get_enumerated
unsigned int snd_ctl_elem_value_get_enumerated(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get an element members value.
Definition control.c:3507

snd_ctl_close
int snd_ctl_close(snd_ctl_t *ctl)
close CTL handle
Definition control.c:236

snd_ctl_elem_unlock
int snd_ctl_elem_unlock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Unlock CTL element.
Definition control.c:1171

snd_ctl_event_elem_get_device
unsigned int snd_ctl_event_elem_get_device(const snd_ctl_event_t *obj)
Get device part of CTL element identifier for an element related event.
Definition control.c:1825

snd_ctl_event_type_name
const char * snd_ctl_event_type_name(snd_ctl_event_type_t type)
get name of a CTL event type
Definition control.c:1728

snd_ctl_card_info_get_mixername
const char * snd_ctl_card_info_get_mixername(const snd_ctl_card_info_t *obj)
Get the sound card mixer name from the given info object.
Definition control.c:2268

snd_ctl_type
snd_ctl_type_t snd_ctl_type(snd_ctl_t *ctl)
get type of CTL handle
Definition control.c:222

snd_ctl_add_boolean_elem_set
int snd_ctl_add_boolean_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info, unsigned int element_count, unsigned int member_count)
Create and add some user-defined control elements of boolean type.
Definition control.c:711

snd_hctl_handle_events
int snd_hctl_handle_events(snd_hctl_t *hctl)
Handle pending HCTL events invoking callbacks.
Definition hcontrol.c:779

snd_hctl_find_elem
snd_hctl_elem_t * snd_hctl_find_elem(snd_hctl_t *hctl, const snd_ctl_elem_id_t *id)
Search an HCTL element.
Definition hcontrol.c:551

snd_hctl_last_elem
snd_hctl_elem_t * snd_hctl_last_elem(snd_hctl_t *hctl)
get last element for an HCTL
Definition hcontrol.c:511

snd_hctl_name
const char * snd_hctl_name(snd_hctl_t *hctl)
get identifier of HCTL handle
Definition hcontrol.c:130

snd_hctl_get_count
unsigned int snd_hctl_get_count(snd_hctl_t *hctl)
Get number of loaded elements for an HCTL.
Definition hcontrol.c:662

snd_hctl_set_compare
int snd_hctl_set_compare(snd_hctl_t *hctl, snd_hctl_compare_t compare)
Change HCTL compare function and reorder elements.
Definition hcontrol.c:448

snd_hctl_get_callback_private
void * snd_hctl_get_callback_private(snd_hctl_t *hctl)
Get callback private value for an HCTL.
Definition hcontrol.c:651

snd_hctl_free
int snd_hctl_free(snd_hctl_t *hctl)
free HCTL loaded elements
Definition hcontrol.c:402

snd_hctl_wait
int snd_hctl_wait(snd_hctl_t *hctl, int timeout)
Wait for a HCTL to become ready (i.e. at least one event pending)
Definition hcontrol.c:675

snd_hctl_poll_descriptors_count
int snd_hctl_poll_descriptors_count(snd_hctl_t *hctl)
get count of poll descriptors for HCTL handle
Definition hcontrol.c:168

snd_hctl_nonblock
int snd_hctl_nonblock(snd_hctl_t *hctl, int nonblock)
set nonblock mode
Definition hcontrol.c:142

snd_hctl_poll_descriptors_revents
int snd_hctl_poll_descriptors_revents(snd_hctl_t *hctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents)
get returned events from poll descriptors
Definition hcontrol.c:195

snd_hctl_elem_tlv_read
int snd_hctl_elem_tlv_read(snd_hctl_elem_t *elem, unsigned int *tlv, unsigned int tlv_size)
Get TLV value for an HCTL element.
Definition hcontrol.c:853

snd_hctl_open_ctl
int snd_hctl_open_ctl(snd_hctl_t **hctlp, snd_ctl_t *ctl)
Opens an HCTL.
Definition hcontrol.c:89

snd_hctl_elem_get_hctl
snd_hctl_t * snd_hctl_elem_get_hctl(snd_hctl_elem_t *elem)
Get HCTL handle for an HCTL element.
Definition hcontrol.c:898

snd_hctl_load
int snd_hctl_load(snd_hctl_t *hctl)
Load an HCTL with all elements and sort them.
Definition hcontrol.c:565

snd_hctl_set_callback_private
void snd_hctl_set_callback_private(snd_hctl_t *hctl, void *callback_private)
Set callback private value for an HCTL.
Definition hcontrol.c:640

snd_hctl_poll_descriptors
int snd_hctl_poll_descriptors(snd_hctl_t *hctl, struct pollfd *pfds, unsigned int space)
get poll descriptors
Definition hcontrol.c:181

snd_hctl_open
int snd_hctl_open(snd_hctl_t **hctlp, const char *name, int mode)
Opens an HCTL.
Definition hcontrol.c:70

snd_hctl_elem_read
int snd_hctl_elem_read(snd_hctl_elem_t *elem, snd_ctl_elem_value_t *value)
Get value for an HCTL element.
Definition hcontrol.c:820

snd_hctl_elem_get_subdevice
unsigned int snd_hctl_elem_get_subdevice(const snd_hctl_elem_t *obj)
Get subdevice part of CTL element identifier of a CTL element id/value.
Definition hcontrol.c:953

snd_hctl_elem_next
snd_hctl_elem_t * snd_hctl_elem_next(snd_hctl_elem_t *elem)
get next HCTL element
Definition hcontrol.c:524

snd_hctl_ctl
snd_ctl_t * snd_hctl_ctl(snd_hctl_t *hctl)
Get a ctl handle associated to the given hctl handle.
Definition hcontrol.c:724

snd_hctl_elem_get_name
const char * snd_hctl_elem_get_name(const snd_hctl_elem_t *obj)
Get name part of CTL element identifier of a CTL element id/value.
Definition hcontrol.c:964

snd_hctl_set_callback
void snd_hctl_set_callback(snd_hctl_t *hctl, snd_hctl_callback_t callback)
Set callback function for an HCTL.
Definition hcontrol.c:629

snd_hctl_elem_get_index
unsigned int snd_hctl_elem_get_index(const snd_hctl_elem_t *obj)
Get index part of CTL element identifier of a CTL element id/value.
Definition hcontrol.c:975

snd_hctl_elem_set_callback_private
void snd_hctl_elem_set_callback_private(snd_hctl_elem_t *obj, void *val)
Set callback private value for an HCTL element.
Definition hcontrol.c:997

snd_hctl_compare_fast
int snd_hctl_compare_fast(const snd_hctl_elem_t *c1, const snd_hctl_elem_t *c2)
A "don't care" fast compare functions that may be used with snd_hctl_set_compare.
Definition hcontrol.c:462

snd_hctl_elem_get_callback_private
void * snd_hctl_elem_get_callback_private(const snd_hctl_elem_t *obj)
Get callback private value for an HCTL element.
Definition hcontrol.c:1008

snd_hctl_elem_tlv_write
int snd_hctl_elem_tlv_write(snd_hctl_elem_t *elem, const unsigned int *tlv)
Set TLV value for an HCTL element.
Definition hcontrol.c:869

snd_hctl_elem_get_interface
snd_ctl_elem_iface_t snd_hctl_elem_get_interface(const snd_hctl_elem_t *obj)
Get interface part of CTL element identifier of a CTL element id/value.
Definition hcontrol.c:931

snd_hctl_elem_get_id
void snd_hctl_elem_get_id(const snd_hctl_elem_t *obj, snd_ctl_elem_id_t *ptr)
Get CTL element identifier of a CTL element id/value.
Definition hcontrol.c:909

snd_hctl_elem_prev
snd_hctl_elem_t * snd_hctl_elem_prev(snd_hctl_elem_t *elem)
get previous HCTL element
Definition hcontrol.c:537

snd_hctl_elem_set_callback
void snd_hctl_elem_set_callback(snd_hctl_elem_t *obj, snd_hctl_elem_callback_t val)
Set callback function for an HCTL element.
Definition hcontrol.c:986

snd_hctl_elem_info
int snd_hctl_elem_info(snd_hctl_elem_t *elem, snd_ctl_elem_info_t *info)
Get information for an HCTL element.
Definition hcontrol.c:805

snd_hctl_elem_get_numid
unsigned int snd_hctl_elem_get_numid(const snd_hctl_elem_t *obj)
Get element numeric identifier of a CTL element id/value.
Definition hcontrol.c:920

snd_hctl_elem_get_device
unsigned int snd_hctl_elem_get_device(const snd_hctl_elem_t *obj)
Get device part of CTL element identifier of a CTL element id/value.
Definition hcontrol.c:942

snd_hctl_close
int snd_hctl_close(snd_hctl_t *hctl)
close HCTL handle
Definition hcontrol.c:111

snd_hctl_elem_tlv_command
int snd_hctl_elem_tlv_command(snd_hctl_elem_t *elem, const unsigned int *tlv)
Set TLV value for an HCTL element.
Definition hcontrol.c:885

snd_hctl_first_elem
snd_hctl_elem_t * snd_hctl_first_elem(snd_hctl_t *hctl)
get first element for an HCTL
Definition hcontrol.c:498

snd_hctl_elem_write
int snd_hctl_elem_write(snd_hctl_elem_t *elem, snd_ctl_elem_value_t *value)
Set value for an HCTL element.
Definition hcontrol.c:837

snd_device_name_free_hint
int snd_device_name_free_hint(void **hints)
Free a list of device name hints.
Definition namehint.c:684

snd_device_name_hint
int snd_device_name_hint(int card, const char *iface, void ***hints)
Get a set of device name hints.
Definition namehint.c:583

snd_device_name_get_hint
char * snd_device_name_get_hint(const void *hint, const char *id)
Extract a value from a hint.
Definition namehint.c:712

snd_sctl_install
int snd_sctl_install(snd_sctl_t *h)
Install given values to control elements.
Definition setup.c:83

snd_sctl_free
int snd_sctl_free(snd_sctl_t *sctl)
Free setup control handle.
Definition setup.c:644

snd_sctl_build
int snd_sctl_build(snd_sctl_t **sctl, snd_ctl_t *handle, snd_config_t *conf, snd_config_t *private_data, int mode)
Build setup control handle.
Definition setup.c:603

snd_sctl_remove
int snd_sctl_remove(snd_sctl_t *h)
Remove (restore) previous values from control elements.
Definition setup.c:181

snd_tlv_convert_from_dB
int snd_tlv_convert_from_dB(unsigned int *tlv, long rangemin, long rangemax, long db_gain, long *value, int xdir)
Convert from dB gain to the corresponding raw value.
Definition tlv.c:302

snd_ctl_convert_from_dB
int snd_ctl_convert_from_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, long db_gain, long *value, int xdir)
Convert from dB gain to the raw volume value on the given control element.
Definition tlv.c:508

snd_tlv_parse_dB_info
int snd_tlv_parse_dB_info(unsigned int *tlv, unsigned int tlv_size, unsigned int **db_tlvp)
Parse TLV stream and retrieve dB information.
Definition tlv.c:61

snd_tlv_convert_to_dB
int snd_tlv_convert_to_dB(unsigned int *tlv, long rangemin, long rangemax, long volume, long *db_gain)
Convert the given raw volume value to a dB gain.
Definition tlv.c:210

snd_ctl_get_dB_range
int snd_ctl_get_dB_range(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, long *min, long *max)
Get the dB min/max values on the given control element.
Definition tlv.c:464

snd_ctl_convert_to_dB
int snd_ctl_convert_to_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, long volume, long *db_gain)
Convert the volume value to dB on the given control element.
Definition tlv.c:485

snd_tlv_get_dB_range
int snd_tlv_get_dB_range(unsigned int *tlv, long rangemin, long rangemax, long *min, long *max)
Get the dB min/max values.
Definition tlv.c:138