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timer.h File Reference

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

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## Data Structures

struct | snd_timer_read_t
struct | snd_timer_tread_t

## Macros

#define | SND_TIMER_DLSYM_VERSION _dlsym_timer_001
#define | SND_TIMER_QUERY_DLSYM_VERSION _dlsym_timer_query_001
#define | SND_TIMER_GLOBAL_SYSTEM 0
#define | SND_TIMER_GLOBAL_RTC 1 /* Obsoleted, due to enough legacy. */
#define | SND_TIMER_GLOBAL_HPET 2
#define | SND_TIMER_GLOBAL_HRTIMER 3
#define | SND_TIMER_OPEN_NONBLOCK (1<<0)
#define | SND_TIMER_OPEN_TREAD (1<<1)
#define | snd_timer_id_alloca(ptr) __snd_alloca(ptr, snd_timer_id)
#define | snd_timer_ginfo_alloca(ptr) __snd_alloca(ptr, snd_timer_ginfo)
#define | snd_timer_info_alloca(ptr) __snd_alloca(ptr, snd_timer_info)
#define | snd_timer_params_alloca(ptr) __snd_alloca(ptr, snd_timer_params)
#define | snd_timer_status_alloca(ptr) __snd_alloca(ptr, snd_timer_status)

## Typedefs

typedef struct _snd_timer_id | snd_timer_id_t
typedef struct _snd_timer_ginfo | snd_timer_ginfo_t
typedef struct _snd_timer_gparams | snd_timer_gparams_t
typedef struct _snd_timer_gstatus | snd_timer_gstatus_t
typedef struct _snd_timer_info | snd_timer_info_t
typedef struct _snd_timer_params | snd_timer_params_t
typedef struct _snd_timer_status | snd_timer_status_t
typedef struct _snd_timer_query | snd_timer_query_t
typedef struct _snd_timer | snd_timer_t

## Enumerations

enum | snd_timer_class_t { SND_TIMER_CLASS_NONE = -1 , SND_TIMER_CLASS_SLAVE = 0 , SND_TIMER_CLASS_GLOBAL , SND_TIMER_CLASS_CARD , SND_TIMER_CLASS_PCM , SND_TIMER_CLASS_LAST = SND_TIMER_CLASS_PCM }
enum | snd_timer_slave_class_t { SND_TIMER_SCLASS_NONE = 0 , SND_TIMER_SCLASS_APPLICATION , SND_TIMER_SCLASS_SEQUENCER , SND_TIMER_SCLASS_OSS_SEQUENCER , SND_TIMER_SCLASS_LAST = SND_TIMER_SCLASS_OSS_SEQUENCER }

enum

snd_timer_event_t {
SND_TIMER_EVENT_RESOLUTION = 0 , SND_TIMER_EVENT_TICK , SND_TIMER_EVENT_START , SND_TIMER_EVENT_STOP ,
SND_TIMER_EVENT_CONTINUE , SND_TIMER_EVENT_PAUSE , SND_TIMER_EVENT_EARLY , SND_TIMER_EVENT_SUSPEND ,
SND_TIMER_EVENT_RESUME , SND_TIMER_EVENT_MSTART = SND_TIMER_EVENT_START + 10 , SND_TIMER_EVENT_MSTOP = SND_TIMER_EVENT_STOP + 10 , SND_TIMER_EVENT_MCONTINUE = SND_TIMER_EVENT_CONTINUE + 10 ,
SND_TIMER_EVENT_MPAUSE = SND_TIMER_EVENT_PAUSE + 10 , SND_TIMER_EVENT_MSUSPEND = SND_TIMER_EVENT_SUSPEND + 10 , SND_TIMER_EVENT_MRESUME = SND_TIMER_EVENT_RESUME + 10
}

enum | snd_timer_type_t { SND_TIMER_TYPE_HW = 0 , SND_TIMER_TYPE_SHM , SND_TIMER_TYPE_INET }

## Functions

int | snd_timer_query_open (snd_timer_query_t **handle, const char *name, int mode)
| Opens a new connection to the timer query interface.
int | snd_timer_query_open_lconf (snd_timer_query_t **handle, const char *name, int mode, snd_config_t *lconf)
| Opens a new connection to the timer query interface using local configuration.
int | snd_timer_query_close (snd_timer_query_t *handle)
| close timer query handle
int | snd_timer_query_next_device (snd_timer_query_t *handle, snd_timer_id_t *tid)
| obtain the next timer identification
int | snd_timer_query_info (snd_timer_query_t *handle, snd_timer_ginfo_t *info)
| obtain the timer global information
int | snd_timer_query_params (snd_timer_query_t *handle, snd_timer_gparams_t *params)
| set the timer global parameters
int | snd_timer_query_status (snd_timer_query_t *handle, snd_timer_gstatus_t *status)
| get the timer global status
int | snd_timer_open (snd_timer_t **handle, const char *name, int mode)
| Opens a new connection to the timer interface.
int | snd_timer_open_lconf (snd_timer_t **handle, const char *name, int mode, snd_config_t *lconf)
| Opens a new connection to the timer interface using local configuration.
int | snd_timer_close (snd_timer_t *handle)
| close timer handle
int | snd_async_add_timer_handler (snd_async_handler_t **handler, snd_timer_t *timer, snd_async_callback_t callback, void *private_data)
| Add an async handler for a timer.
snd_timer_t * | snd_async_handler_get_timer (snd_async_handler_t *handler)
| Return timer handle related to an async handler.
int | snd_timer_poll_descriptors_count (snd_timer_t *handle)
| get count of poll descriptors for timer handle
int | snd_timer_poll_descriptors (snd_timer_t *handle, struct pollfd *pfds, unsigned int space)
| get poll descriptors
int | snd_timer_poll_descriptors_revents (snd_timer_t *timer, struct pollfd *pfds, unsigned int nfds, unsigned short *revents)
| get returned events from poll descriptors
int | snd_timer_info (snd_timer_t *handle, snd_timer_info_t *timer)
| get information about timer handle
int | snd_timer_params (snd_timer_t *handle, snd_timer_params_t *params)
| set parameters for timer handle
int | snd_timer_status (snd_timer_t *handle, snd_timer_status_t *status)
| get status from timer handle
int | snd_timer_start (snd_timer_t *handle)
| start the timer
int | snd_timer_stop (snd_timer_t *handle)
| stop the timer
int | snd_timer_continue (snd_timer_t *handle)
| continue the timer
ssize_t | snd_timer_read (snd_timer_t *handle, void *buffer, size_t size)
| read bytes using timer handle
size_t | snd_timer_id_sizeof (void)
| get size of the snd_timer_id_t structure in bytes
int | snd_timer_id_malloc (snd_timer_id_t **ptr)
| allocate a new snd_timer_id_t structure
void | snd_timer_id_free (snd_timer_id_t *obj)
| frees the snd_timer_id_t structure
void | snd_timer_id_copy (snd_timer_id_t *dst, const snd_timer_id_t *src)
| copy one snd_timer_id_t structure to another
void | snd_timer_id_set_class (snd_timer_id_t *id, int dev_class)
| set timer class
int | snd_timer_id_get_class (snd_timer_id_t *id)
| get timer class
void | snd_timer_id_set_sclass (snd_timer_id_t *id, int dev_sclass)
| set timer sub-class
int | snd_timer_id_get_sclass (snd_timer_id_t *id)
| get timer sub-class
void | snd_timer_id_set_card (snd_timer_id_t *id, int card)
| set timer card
int | snd_timer_id_get_card (snd_timer_id_t *id)
| get timer card
void | snd_timer_id_set_device (snd_timer_id_t *id, int device)
| set timer device
int | snd_timer_id_get_device (snd_timer_id_t *id)
| get timer device
void | snd_timer_id_set_subdevice (snd_timer_id_t *id, int subdevice)
| set timer subdevice
int | snd_timer_id_get_subdevice (snd_timer_id_t *id)
| get timer subdevice
size_t | snd_timer_ginfo_sizeof (void)
| get size of the snd_timer_ginfo_t structure in bytes
int | snd_timer_ginfo_malloc (snd_timer_ginfo_t **ptr)
| allocate a new snd_timer_ginfo_t structure
void | snd_timer_ginfo_free (snd_timer_ginfo_t *obj)
| frees the snd_timer_ginfo_t structure
void | snd_timer_ginfo_copy (snd_timer_ginfo_t *dst, const snd_timer_ginfo_t *src)
| copy one snd_timer_info_t structure to another
int | snd_timer_ginfo_set_tid (snd_timer_ginfo_t *obj, snd_timer_id_t *tid)
| set timer identification
snd_timer_id_t * | snd_timer_ginfo_get_tid (snd_timer_ginfo_t *obj)
| get timer identification
unsigned int | snd_timer_ginfo_get_flags (snd_timer_ginfo_t *obj)
| get timer flags
int | snd_timer_ginfo_get_card (snd_timer_ginfo_t *obj)
| get associated card with timer
char * | snd_timer_ginfo_get_id (snd_timer_ginfo_t *obj)
| get timer identification
char * | snd_timer_ginfo_get_name (snd_timer_ginfo_t *obj)
| get timer name
unsigned long | snd_timer_ginfo_get_resolution (snd_timer_ginfo_t *obj)
| get timer resolution in ns
unsigned long | snd_timer_ginfo_get_resolution_min (snd_timer_ginfo_t *obj)
| get timer minimal resolution in ns
unsigned long | snd_timer_ginfo_get_resolution_max (snd_timer_ginfo_t *obj)
| get timer maximal resolution in ns
unsigned int | snd_timer_ginfo_get_clients (snd_timer_ginfo_t *obj)
| get current timer clients
size_t | snd_timer_info_sizeof (void)
| get size of the snd_timer_info_t structure in bytes
int | snd_timer_info_malloc (snd_timer_info_t **ptr)
| allocate a new snd_timer_info_t structure
void | snd_timer_info_free (snd_timer_info_t *obj)
| frees the snd_timer_info_t structure
void | snd_timer_info_copy (snd_timer_info_t *dst, const snd_timer_info_t *src)
| copy one snd_timer_info_t structure to another
int | snd_timer_info_is_slave (snd_timer_info_t *info)
| determine, if timer is slave
int | snd_timer_info_get_card (snd_timer_info_t *info)
| get timer card
const char * | snd_timer_info_get_id (snd_timer_info_t *info)
| get timer id
const char * | snd_timer_info_get_name (snd_timer_info_t *info)
| get timer name
long | snd_timer_info_get_resolution (snd_timer_info_t *info)
| get timer resolution in us
size_t | snd_timer_params_sizeof (void)
| get size of the snd_timer_params_t structure in bytes
int | snd_timer_params_malloc (snd_timer_params_t **ptr)
| allocate a new snd_timer_params_t structure
void | snd_timer_params_free (snd_timer_params_t *obj)
| frees the snd_timer_params_t structure
void | snd_timer_params_copy (snd_timer_params_t *dst, const snd_timer_params_t *src)
| copy one snd_timer_params_t structure to another
int | snd_timer_params_set_auto_start (snd_timer_params_t *params, int auto_start)
| set timer auto start
int | snd_timer_params_get_auto_start (snd_timer_params_t *params)
| determine if timer has auto start flag
int | snd_timer_params_set_exclusive (snd_timer_params_t *params, int exclusive)
| set timer exclusive use
int | snd_timer_params_get_exclusive (snd_timer_params_t *params)
| determine if timer has exclusive flag
int | snd_timer_params_set_early_event (snd_timer_params_t *params, int early_event)
| set timer early event
int | snd_timer_params_get_early_event (snd_timer_params_t *params)
| determine if timer has early event flag
void | snd_timer_params_set_ticks (snd_timer_params_t *params, long ticks)
| set timer ticks
long | snd_timer_params_get_ticks (snd_timer_params_t *params)
| get timer ticks
void | snd_timer_params_set_queue_size (snd_timer_params_t *params, long queue_size)
| set timer queue size (32-1024)
long | snd_timer_params_get_queue_size (snd_timer_params_t *params)
| get queue size
void | snd_timer_params_set_filter (snd_timer_params_t *params, unsigned int filter)
| set timer event filter
unsigned int | snd_timer_params_get_filter (snd_timer_params_t *params)
| get timer event filter
size_t | snd_timer_status_sizeof (void)
| get size of the snd_timer_status_t structure in bytes
int | snd_timer_status_malloc (snd_timer_status_t **ptr)
| allocate a new snd_timer_status_t structure
void | snd_timer_status_free (snd_timer_status_t *obj)
| frees the snd_timer_status_t structure
void | snd_timer_status_copy (snd_timer_status_t *dst, const snd_timer_status_t *src)
| copy one snd_timer_status_t structure to another
snd_htimestamp_t | snd_timer_status_get_timestamp (snd_timer_status_t *status)
| get timestamp
long | snd_timer_status_get_resolution (snd_timer_status_t *status)
| get resolution in us
long | snd_timer_status_get_lost (snd_timer_status_t *status)
| get master tick lost count
long | snd_timer_status_get_overrun (snd_timer_status_t *status)
| get overrun count
long | snd_timer_status_get_queue (snd_timer_status_t *status)
| get count of used queue elements
long | snd_timer_info_get_ticks (snd_timer_info_t *info)
| (DEPRECATED) get maximum timer ticks

## Detailed Description

Application interface library for the ALSA driver.

Author
  Jaroslav Kysela perex.nosp@m.@per.nosp@m.ex.cz
  Abramo Bagnara abram.nosp@m.o@al.nosp@m.sa-pr.nosp@m.ojec.nosp@m.t.org
  Takashi Iwai tiwai.nosp@m.@sus.nosp@m.e.de

Date
  1998-2001

Application interface library for the ALSA driver