Main Page   Modules   Data Structures   File List   Data Fields   Globals   Related Pages   Examples  

control.h File Reference

Application interface library for the ALSA driver. More...

Go to the source code of this file.

Data Structures

struct  snd_aes_iec958

Defines

#define SND_CONTROL_DLSYM_VERSION   _dlsym_control_001
#define SND_CTL_EVENT_MASK_REMOVE
#define SND_CTL_EVENT_MASK_VALUE
#define SND_CTL_EVENT_MASK_INFO
#define SND_CTL_EVENT_MASK_ADD
#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_NONBLOCK
#define SND_CTL_ASYNC
#define SND_SCTL_NOFREE   0x0001
#define snd_ctl_elem_id_alloca(ptr)
 allocate an invalid snd_ctl_elem_id_t using standard alloca. More...

#define snd_ctl_card_info_alloca(ptr)
 allocate an invalid snd_ctl_card_info_t using standard alloca. More...

#define snd_ctl_event_alloca(ptr)
 allocate an invalid snd_ctl_event_t using standard alloca. More...

#define snd_ctl_elem_list_alloca(ptr)
 allocate an invalid snd_ctl_elem_list_t using standard alloca. More...

#define snd_ctl_elem_info_alloca(ptr)
 allocate an invalid snd_ctl_elem_info_t using standard alloca. More...

#define snd_ctl_elem_value_alloca(ptr)
 allocate an invalid snd_ctl_elem_value_t using standard alloca. More...


Typedefs

typedef snd_aes_iec958 snd_aes_iec958_t
typedef _snd_ctl_card_info snd_ctl_card_info_t
typedef _snd_ctl_elem_id snd_ctl_elem_id_t
typedef _snd_ctl_elem_list snd_ctl_elem_list_t
typedef _snd_ctl_elem_info snd_ctl_elem_info_t
typedef _snd_ctl_elem_value snd_ctl_elem_value_t
typedef _snd_ctl_event snd_ctl_event_t
typedef enum _snd_ctl_elem_type snd_ctl_elem_type_t
typedef enum _snd_ctl_elem_iface snd_ctl_elem_iface_t
typedef enum _snd_ctl_event_type snd_ctl_event_type_t
typedef enum _snd_ctl_type snd_ctl_type_t
typedef _snd_ctl snd_ctl_t
typedef _snd_sctl snd_sctl_t
typedef _snd_hctl_elem snd_hctl_elem_t
typedef _snd_hctl snd_hctl_t
typedef int(* snd_hctl_compare_t )(const snd_hctl_elem_t *e1, const snd_hctl_elem_t *e2)
 Compare function for sorting HCTL elements. More...

typedef int(* snd_hctl_callback_t )(snd_hctl_t *hctl, unsigned int mask, snd_hctl_elem_t *elem)
 HCTL callback function. More...

typedef int(* snd_hctl_elem_callback_t )(snd_hctl_elem_t *elem, unsigned int mask)
 HCTL element callback function. More...


Enumerations

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
}
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
}
enum  _snd_ctl_event_type { SND_CTL_EVENT_ELEM = 0, SND_CTL_EVENT_LAST = SND_CTL_EVENT_ELEM }
enum  _snd_ctl_type { SND_CTL_TYPE_HW, SND_CTL_TYPE_SHM, SND_CTL_TYPE_INET }

Functions

int snd_card_load (int card)
 Try to load the driver for a card. More...

int snd_card_next (int *card)
 Try to determine the next card. More...

int snd_card_get_index (const char *name)
 Convert card string to an integer value. More...

int snd_card_get_name (int card, char **name)
 Obtain the card name. More...

int snd_card_get_longname (int card, char **name)
 Obtain the card long name. More...

int snd_ctl_open (snd_ctl_t **ctl, const char *name, int mode)
 Opens a CTL. More...

int snd_ctl_open_lconf (snd_ctl_t **ctl, const char *name, int mode, snd_config_t *lconf)
 Opens a CTL using local configuration. More...

int snd_ctl_close (snd_ctl_t *ctl)
 close CTL handle. More...

int snd_ctl_nonblock (snd_ctl_t *ctl, int nonblock)
 set nonblock mode. More...

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. More...

snd_ctl_tsnd_async_handler_get_ctl (snd_async_handler_t *handler)
 Return CTL handle related to an async handler. More...

int snd_ctl_poll_descriptors_count (snd_ctl_t *ctl)
 get count of poll descriptors for CTL handle. More...

int snd_ctl_poll_descriptors (snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space)
 get poll descriptors. More...

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. More...

int snd_ctl_subscribe_events (snd_ctl_t *ctl, int subscribe)
 Ask to be informed about events (poll, snd_ctl_async, snd_ctl_read). More...

int snd_ctl_card_info (snd_ctl_t *ctl, snd_ctl_card_info_t *info)
 Get card related information. More...

int snd_ctl_elem_list (snd_ctl_t *ctl, snd_ctl_elem_list_t *list)
 Get a list of element identifiers. More...

int snd_ctl_elem_info (snd_ctl_t *ctl, snd_ctl_elem_info_t *info)
 Get CTL element information. More...

int snd_ctl_elem_read (snd_ctl_t *ctl, snd_ctl_elem_value_t *value)
 Get CTL element value. More...

int snd_ctl_elem_write (snd_ctl_t *ctl, snd_ctl_elem_value_t *value)
 Set CTL element value. More...

int snd_ctl_elem_lock (snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
 Lock CTL element. More...

int snd_ctl_elem_unlock (snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
 Unlock CTL element. More...

int snd_ctl_hwdep_next_device (snd_ctl_t *ctl, int *device)
 Get next hardware dependent device number. More...

int snd_ctl_hwdep_info (snd_ctl_t *ctl, snd_hwdep_info_t *info)
 Get info about a hardware dependent device. More...

int snd_ctl_pcm_next_device (snd_ctl_t *ctl, int *device)
 Get next PCM device number. More...

int snd_ctl_pcm_info (snd_ctl_t *ctl, snd_pcm_info_t *info)
 Get info about a PCM device. More...

int snd_ctl_pcm_prefer_subdevice (snd_ctl_t *ctl, int subdev)
 Set preferred PCM subdevice number of successive PCM open. More...

int snd_ctl_rawmidi_next_device (snd_ctl_t *ctl, int *device)
 Get next RawMidi device number. More...

int snd_ctl_rawmidi_info (snd_ctl_t *ctl, snd_rawmidi_info_t *info)
 Get info about a RawMidi device. More...

int snd_ctl_rawmidi_prefer_subdevice (snd_ctl_t *ctl, int subdev)
 Set preferred RawMidi subdevice number of successive RawMidi open. More...

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. More...

int snd_ctl_get_power_state (snd_ctl_t *ctl, unsigned int *state)
 Get actual Power State. More...

int snd_ctl_read (snd_ctl_t *ctl, snd_ctl_event_t *event)
 Read an event. More...

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

const char * snd_ctl_name (snd_ctl_t *ctl)
 get identifier of CTL handle. More...

snd_ctl_type_t snd_ctl_type (snd_ctl_t *ctl)
 get type of CTL handle. More...

void snd_ctl_elem_set_bytes (snd_ctl_elem_value_t *obj, void *data, size_t size)
 Set CTL element SND_CTL_ELEM_TYPE_BYTES value. More...

const char * snd_ctl_elem_type_name (snd_ctl_elem_type_t type)
 get name of a CTL element type. More...

const char * snd_ctl_elem_iface_name (snd_ctl_elem_iface_t iface)
 get name of a CTL element related interface. More...

const char * snd_ctl_event_type_name (snd_ctl_event_type_t type)
 get name of a CTL event type. More...

unsigned int snd_ctl_event_elem_get_mask (const snd_ctl_event_t *obj)
 Get event mask for an element related event. More...

unsigned int snd_ctl_event_elem_get_numid (const snd_ctl_event_t *obj)
 Get element numeric identifier for an element related event. More...

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. More...

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. More...

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. More...

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. More...

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. More...

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. More...

int snd_ctl_elem_list_alloc_space (snd_ctl_elem_list_t *obj, unsigned int entries)
 allocate space for CTL element identifiers list. More...

void snd_ctl_elem_list_free_space (snd_ctl_elem_list_t *obj)
 free previously allocated space for CTL element identifiers list. More...

size_t snd_ctl_elem_id_sizeof (void)
 get size of snd_ctl_elem_id_t. More...

int snd_ctl_elem_id_malloc (snd_ctl_elem_id_t **ptr)
 allocate an invalid snd_ctl_elem_id_t using standard malloc. More...

void snd_ctl_elem_id_free (snd_ctl_elem_id_t *obj)
 frees a previously allocated snd_ctl_elem_id_t. More...

void snd_ctl_elem_id_clear (snd_ctl_elem_id_t *obj)
 clear given snd_ctl_elem_id_t object. More...

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. More...

unsigned int snd_ctl_elem_id_get_numid (const snd_ctl_elem_id_t *obj)
 Get numeric identifier from a CTL element identifier. More...

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. More...

unsigned int snd_ctl_elem_id_get_device (const snd_ctl_elem_id_t *obj)
 Get device part of a CTL element identifier. More...

unsigned int snd_ctl_elem_id_get_subdevice (const snd_ctl_elem_id_t *obj)
 Get subdevice part of a CTL element identifier. More...

const char * snd_ctl_elem_id_get_name (const snd_ctl_elem_id_t *obj)
 Get name part of a CTL element identifier. More...

unsigned int snd_ctl_elem_id_get_index (const snd_ctl_elem_id_t *obj)
 Get index part of a CTL element identifier. More...

void snd_ctl_elem_id_set_numid (snd_ctl_elem_id_t *obj, unsigned int val)
 Set numeric identifier for a CTL element identifier. More...

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. More...

void snd_ctl_elem_id_set_device (snd_ctl_elem_id_t *obj, unsigned int val)
 Set device part for a CTL element identifier. More...

void snd_ctl_elem_id_set_subdevice (snd_ctl_elem_id_t *obj, unsigned int val)
 Set subdevice part for a CTL element identifier. More...

void snd_ctl_elem_id_set_name (snd_ctl_elem_id_t *obj, const char *val)
 Set name part for a CTL element identifier. More...

void snd_ctl_elem_id_set_index (snd_ctl_elem_id_t *obj, unsigned int val)
 Set index part for a CTL element identifier. More...

size_t snd_ctl_card_info_sizeof (void)
 get size of snd_ctl_card_info_t. More...

int snd_ctl_card_info_malloc (snd_ctl_card_info_t **ptr)
 allocate an invalid snd_ctl_card_info_t using standard malloc. More...

void snd_ctl_card_info_free (snd_ctl_card_info_t *obj)
 frees a previously allocated snd_ctl_card_info_t. More...

void snd_ctl_card_info_clear (snd_ctl_card_info_t *obj)
 clear given snd_ctl_card_info_t object. More...

void snd_ctl_card_info_copy (snd_ctl_card_info_t *dst, const snd_ctl_card_info_t *src)
 copy one snd_ctl_card_info_t to another. More...

int snd_ctl_card_info_get_card (const snd_ctl_card_info_t *obj)
 Get card number from a CTL card info. More...

const char * snd_ctl_card_info_get_id (const snd_ctl_card_info_t *obj)
 Get card identifier from a CTL card info. More...

const char * snd_ctl_card_info_get_driver (const snd_ctl_card_info_t *obj)
 Get card driver name from a CTL card info. More...

const char * snd_ctl_card_info_get_name (const snd_ctl_card_info_t *obj)
 Get card name from a CTL card info. More...

const char * snd_ctl_card_info_get_longname (const snd_ctl_card_info_t *obj)
 Get card long name from a CTL card info. More...

const char * snd_ctl_card_info_get_mixername (const snd_ctl_card_info_t *obj)
 Get card mixer name from a CTL card info. More...

const char * snd_ctl_card_info_get_components (const snd_ctl_card_info_t *obj)
 Get card component list from a CTL card info. More...

size_t snd_ctl_event_sizeof (void)
 get size of snd_ctl_event_t. More...

int snd_ctl_event_malloc (snd_ctl_event_t **ptr)
 allocate an invalid snd_ctl_event_t using standard malloc. More...

void snd_ctl_event_free (snd_ctl_event_t *obj)
 frees a previously allocated snd_ctl_event_t. More...

void snd_ctl_event_clear (snd_ctl_event_t *obj)
 clear given snd_ctl_event_t object. More...

void snd_ctl_event_copy (snd_ctl_event_t *dst, const snd_ctl_event_t *src)
 copy one snd_ctl_event_t to another. More...

snd_ctl_event_type_t snd_ctl_event_get_type (const snd_ctl_event_t *obj)
 Get type of a CTL event. More...

size_t snd_ctl_elem_list_sizeof (void)
 get size of snd_ctl_elem_list_t. More...

int snd_ctl_elem_list_malloc (snd_ctl_elem_list_t **ptr)
 allocate an invalid snd_ctl_elem_list_t using standard malloc. More...

void snd_ctl_elem_list_free (snd_ctl_elem_list_t *obj)
 frees a previously allocated snd_ctl_elem_list_t. More...

void snd_ctl_elem_list_clear (snd_ctl_elem_list_t *obj)
 clear given snd_ctl_elem_list_t object. More...

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. More...

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. More...

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. More...

unsigned int snd_ctl_elem_list_get_count (const snd_ctl_elem_list_t *obj)
 Get total count of elements present in CTL device (information present in every filled CTL element identifiers list). More...

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. More...

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. More...

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. More...

unsigned int snd_ctl_elem_list_get_device (const snd_ctl_elem_list_t *obj, unsigned int idx)
 Get device part of CTL element identifier for an entry of a CTL element identifiers list. More...

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. More...

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. More...

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. More...

size_t snd_ctl_elem_info_sizeof (void)
 get size of snd_ctl_elem_info_t. More...

int snd_ctl_elem_info_malloc (snd_ctl_elem_info_t **ptr)
 allocate an invalid snd_ctl_elem_info_t using standard malloc. More...

void snd_ctl_elem_info_free (snd_ctl_elem_info_t *obj)
 frees a previously allocated snd_ctl_elem_info_t. More...

void snd_ctl_elem_info_clear (snd_ctl_elem_info_t *obj)
 clear given snd_ctl_elem_info_t object. More...

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. More...

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. More...

int snd_ctl_elem_info_is_readable (const snd_ctl_elem_info_t *obj)
 Get info about readability from a CTL element id/info. More...

int snd_ctl_elem_info_is_writable (const snd_ctl_elem_info_t *obj)
 Get info about writability from a CTL element id/info. More...

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. More...

int snd_ctl_elem_info_is_inactive (const snd_ctl_elem_info_t *obj)
 Get info about status from a CTL element id/info. More...

int snd_ctl_elem_info_is_locked (const snd_ctl_elem_info_t *obj)
 Get info whether an element is locked. More...

int snd_ctl_elem_info_is_owner (const snd_ctl_elem_info_t *obj)
 Get info if I own an element. More...

int snd_ctl_elem_info_is_indirect (const snd_ctl_elem_info_t *obj)
 Get info about values passing policy from a CTL element id/info. More...

pid_t snd_ctl_elem_info_get_owner (const snd_ctl_elem_info_t *obj)
 Get owner of a locked element. More...

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. More...

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. More...

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. More...

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. More...

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. More...

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. More...

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. More...

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. More...

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. More...

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. More...

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. More...

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. More...

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. More...

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. More...

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. More...

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. More...

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. More...

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. More...

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. More...

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. More...

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. More...

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. More...

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. More...

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. More...

size_t snd_ctl_elem_value_sizeof (void)
 get size of snd_ctl_elem_value_t. More...

int snd_ctl_elem_value_malloc (snd_ctl_elem_value_t **ptr)
 allocate an invalid snd_ctl_elem_value_t using standard malloc. More...

void snd_ctl_elem_value_free (snd_ctl_elem_value_t *obj)
 frees a previously allocated snd_ctl_elem_value_t. More...

void snd_ctl_elem_value_clear (snd_ctl_elem_value_t *obj)
 clear given snd_ctl_elem_value_t object. More...

void snd_ctl_elem_value_copy (snd_ctl_elem_value_t *dst, const snd_ctl_elem_value_t *src)
 copy one snd_ctl_elem_value_t to another. More...

void snd_ctl_elem_value_get_id (const snd_ctl_elem_value_t *obj, snd_ctl_elem_id_t *ptr)
 Get CTL element identifier of a CTL element id/value. More...

unsigned int snd_ctl_elem_value_get_numid (const snd_ctl_elem_value_t *obj)
 Get element numeric identifier of a CTL element id/value. More...

snd_ctl_elem_iface_t snd_ctl_elem_value_get_interface (const snd_ctl_elem_value_t *obj)
 Get interface part of CTL element identifier of a CTL element id/value. More...

unsigned int snd_ctl_elem_value_get_device (const snd_ctl_elem_value_t *obj)
 Get device part of CTL element identifier of a CTL element id/value. More...

unsigned int snd_ctl_elem_value_get_subdevice (const snd_ctl_elem_value_t *obj)
 Get subdevice part of CTL element identifier of a CTL element id/value. More...

const char * snd_ctl_elem_value_get_name (const snd_ctl_elem_value_t *obj)
 Get name part of CTL element identifier of a CTL element id/value. More...

unsigned int snd_ctl_elem_value_get_index (const snd_ctl_elem_value_t *obj)
 Get index part of CTL element identifier of a CTL element id/value. More...

void snd_ctl_elem_value_set_id (snd_ctl_elem_value_t *obj, const snd_ctl_elem_id_t *ptr)
 Set CTL element identifier of a CTL element id/value. More...

void snd_ctl_elem_value_set_numid (snd_ctl_elem_value_t *obj, unsigned int val)
 Set element numeric identifier of a CTL element id/value. More...

void snd_ctl_elem_value_set_interface (snd_ctl_elem_value_t *obj, snd_ctl_elem_iface_t val)
 Set interface part of CTL element identifier of a CTL element id/value. More...

void snd_ctl_elem_value_set_device (snd_ctl_elem_value_t *obj, unsigned int val)
 Set device part of CTL element identifier of a CTL element id/value. More...

void snd_ctl_elem_value_set_subdevice (snd_ctl_elem_value_t *obj, unsigned int val)
 Set subdevice part of CTL element identifier of a CTL element id/value. More...

void snd_ctl_elem_value_set_name (snd_ctl_elem_value_t *obj, const char *val)
 Set name part of CTL element identifier of a CTL element id/value. More...

void snd_ctl_elem_value_set_index (snd_ctl_elem_value_t *obj, unsigned int val)
 Set index part of CTL element identifier of a CTL element id/value. More...

int snd_ctl_elem_value_get_boolean (const snd_ctl_elem_value_t *obj, unsigned int idx)
 Get value for an entry of a SND_CTL_ELEM_TYPE_BOOLEAN CTL element id/value. More...

long snd_ctl_elem_value_get_integer (const snd_ctl_elem_value_t *obj, unsigned int idx)
 Get value for an entry of a SND_CTL_ELEM_TYPE_INTEGER CTL element id/value. More...

long long snd_ctl_elem_value_get_integer64 (const snd_ctl_elem_value_t *obj, unsigned int idx)
 Get value for an entry of a SND_CTL_ELEM_TYPE_INTEGER64 CTL element id/value. More...

unsigned int snd_ctl_elem_value_get_enumerated (const snd_ctl_elem_value_t *obj, unsigned int idx)
 Get value for an entry of a SND_CTL_ELEM_TYPE_ENUMERATED CTL element id/value. More...

unsigned char snd_ctl_elem_value_get_byte (const snd_ctl_elem_value_t *obj, unsigned int idx)
 Get value for an entry of a SND_CTL_ELEM_TYPE_BYTES CTL element id/value. More...

void snd_ctl_elem_value_set_boolean (snd_ctl_elem_value_t *obj, unsigned int idx, long val)
 Set value for an entry of a SND_CTL_ELEM_TYPE_BOOLEAN CTL element id/value. More...

void snd_ctl_elem_value_set_integer (snd_ctl_elem_value_t *obj, unsigned int idx, long val)
 Set value for an entry of a SND_CTL_ELEM_TYPE_INTEGER CTL element id/value. More...

void snd_ctl_elem_value_set_integer64 (snd_ctl_elem_value_t *obj, unsigned int idx, long long val)
 Set value for an entry of a SND_CTL_ELEM_TYPE_INTEGER64 CTL element id/value. More...

void snd_ctl_elem_value_set_enumerated (snd_ctl_elem_value_t *obj, unsigned int idx, unsigned int val)
 Set value for an entry of a SND_CTL_ELEM_TYPE_ENUMERATED CTL element id/value. More...

void snd_ctl_elem_value_set_byte (snd_ctl_elem_value_t *obj, unsigned int idx, unsigned char val)
 Set value for an entry of a SND_CTL_ELEM_TYPE_BYTES CTL element id/value. More...

const void * snd_ctl_elem_value_get_bytes (const snd_ctl_elem_value_t *obj)
 Get value for a SND_CTL_ELEM_TYPE_BYTES CTL element id/value. More...

void snd_ctl_elem_value_get_iec958 (const snd_ctl_elem_value_t *obj, snd_aes_iec958_t *ptr)
 Get value for a SND_CTL_ELEM_TYPE_IEC958 CTL element id/value. More...

void snd_ctl_elem_value_set_iec958 (snd_ctl_elem_value_t *obj, const snd_aes_iec958_t *ptr)
 Set value for a SND_CTL_ELEM_TYPE_IEC958 CTL element id/value. More...

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. More...

int snd_hctl_open (snd_hctl_t **hctl, const char *name, int mode)
 Opens an HCTL. More...

int snd_hctl_close (snd_hctl_t *hctl)
 close HCTL handle. More...

int snd_hctl_nonblock (snd_hctl_t *hctl, int nonblock)
 set nonblock mode. More...

int snd_hctl_poll_descriptors_count (snd_hctl_t *hctl)
 get count of poll descriptors for HCTL handle. More...

int snd_hctl_poll_descriptors (snd_hctl_t *hctl, struct pollfd *pfds, unsigned int space)
 get poll descriptors. More...

unsigned int snd_hctl_get_count (snd_hctl_t *hctl)
 Get number of loaded elements for an HCTL. More...

int snd_hctl_set_compare (snd_hctl_t *hctl, snd_hctl_compare_t hsort)
 Change HCTL compare function and reorder elements. More...

snd_hctl_elem_tsnd_hctl_first_elem (snd_hctl_t *hctl)
 get first element for an HCTL. More...

snd_hctl_elem_tsnd_hctl_last_elem (snd_hctl_t *hctl)
 get last element for an HCTL. More...

snd_hctl_elem_tsnd_hctl_find_elem (snd_hctl_t *hctl, const snd_ctl_elem_id_t *id)
 Search an HCTL element. More...

void snd_hctl_set_callback (snd_hctl_t *hctl, snd_hctl_callback_t callback)
 Set callback function for an HCTL. More...

void snd_hctl_set_callback_private (snd_hctl_t *hctl, void *data)
 Set callback private value for an HCTL. More...

void * snd_hctl_get_callback_private (snd_hctl_t *hctl)
 Get callback private value for an HCTL. More...

int snd_hctl_load (snd_hctl_t *hctl)
 Load an HCTL with all elements and sort them. More...

int snd_hctl_free (snd_hctl_t *hctl)
 free HCTL loaded elements. More...

int snd_hctl_handle_events (snd_hctl_t *hctl)
 Handle pending HCTL events invoking callbacks. More...

const char * snd_hctl_name (snd_hctl_t *hctl)
 get identifier of HCTL handle. More...

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

snd_hctl_elem_tsnd_hctl_elem_next (snd_hctl_elem_t *elem)
 get next HCTL element. More...

snd_hctl_elem_tsnd_hctl_elem_prev (snd_hctl_elem_t *elem)
 get previous HCTL element. More...

int snd_hctl_elem_info (snd_hctl_elem_t *elem, snd_ctl_elem_info_t *info)
 Get information for an HCTL element. More...

int snd_hctl_elem_read (snd_hctl_elem_t *elem, snd_ctl_elem_value_t *value)
 Get value for an HCTL element. More...

int snd_hctl_elem_write (snd_hctl_elem_t *elem, snd_ctl_elem_value_t *value)
 Set value for an HCTL element. More...

snd_hctl_tsnd_hctl_elem_get_hctl (snd_hctl_elem_t *elem)
 Get HCTL handle for an HCTL element. More...

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. More...

unsigned int snd_hctl_elem_get_numid (const snd_hctl_elem_t *obj)
 Get element numeric identifier of a CTL element id/value. More...

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. More...

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. More...

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. More...

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. More...

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. More...

void snd_hctl_elem_set_callback (snd_hctl_elem_t *obj, snd_hctl_elem_callback_t val)
 Set callback function for an HCTL element. More...

void * snd_hctl_elem_get_callback_private (const snd_hctl_elem_t *obj)
 Get callback private value for an HCTL element. More...

void snd_hctl_elem_set_callback_private (snd_hctl_elem_t *obj, void *val)
 Set callback private value for an HCTL element. More...

int snd_sctl_build (snd_sctl_t **ctl, snd_ctl_t *handle, snd_config_t *config, snd_config_t *private_data, int mode)
 Build setup control handle. More...

int snd_sctl_free (snd_sctl_t *handle)
 Free setup control handle. More...

int snd_sctl_install (snd_sctl_t *handle)
 Install given values to control elements. More...

int snd_sctl_remove (snd_sctl_t *handle)
 Remove (restore) previous values from control elements. More...


Detailed Description

Application interface library for the ALSA driver.

>

Author:
Jaroslav Kysela <perex@suse.cz> , Abramo Bagnara <abramo@alsa-project.org> , Takashi Iwai <tiwai@suse.de>
Date:
1998-2001
Application interface library for the ALSA driver

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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA


Generated on Sun Sep 29 12:29:29 2002 for ALSA project - the C library reference by doxygen1.2.14 written by Dimitri van Heesch, © 1997-2002