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/**
* \file include/timer.h
* \brief Application interface library for the ALSA driver
* \author Jaroslav Kysela <perex@perex.cz>
* \author Abramo Bagnara <abramo@alsa-project.org>
* \author 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifndef __ALSA_TIMER_H
#define __ALSA_TIMER_H
#ifdef __cplusplus
extern "C" {
#endif
/**
* \defgroup Timer Timer Interface
* Timer Interface. See \ref timer page for more details.
* \{
*/
/** dlsym version for interface entry callback */
#define SND_TIMER_DLSYM_VERSION _dlsym_timer_001
/** dlsym version for interface entry callback */
#define SND_TIMER_QUERY_DLSYM_VERSION _dlsym_timer_query_001
/** timer identification structure */
typedef struct _snd_timer_id snd_timer_id_t;
/** timer global info structure */
typedef struct _snd_timer_ginfo snd_timer_ginfo_t;
/** timer global params structure */
typedef struct _snd_timer_gparams snd_timer_gparams_t;
/** timer global status structure */
typedef struct _snd_timer_gstatus snd_timer_gstatus_t;
/** timer info structure */
typedef struct _snd_timer_info snd_timer_info_t;
/** timer params structure */
typedef struct _snd_timer_params snd_timer_params_t;
/** timer status structure */
typedef struct _snd_timer_status snd_timer_status_t;
/** timer master class */
typedef enum _snd_timer_class {
SND_TIMER_CLASS_NONE = -1, /**< invalid */
SND_TIMER_CLASS_SLAVE = 0, /**< slave timer */
SND_TIMER_CLASS_GLOBAL, /**< global timer */
SND_TIMER_CLASS_CARD, /**< card timer */
SND_TIMER_CLASS_PCM, /**< PCM timer */
SND_TIMER_CLASS_LAST = SND_TIMER_CLASS_PCM /**< last timer */
} snd_timer_class_t;
/** timer slave class */
typedef enum _snd_timer_slave_class {
SND_TIMER_SCLASS_NONE = 0, /**< none */
SND_TIMER_SCLASS_APPLICATION, /**< for internal use */
SND_TIMER_SCLASS_SEQUENCER, /**< sequencer timer */
SND_TIMER_SCLASS_OSS_SEQUENCER, /**< OSS sequencer timer */
SND_TIMER_SCLASS_LAST = SND_TIMER_SCLASS_OSS_SEQUENCER /**< last slave timer */
} snd_timer_slave_class_t;
/** timer read event identification */
typedef enum _snd_timer_event {
SND_TIMER_EVENT_RESOLUTION = 0, /* val = resolution in ns */
SND_TIMER_EVENT_TICK, /* val = ticks */
SND_TIMER_EVENT_START, /* val = resolution in ns */
SND_TIMER_EVENT_STOP, /* val = 0 */
SND_TIMER_EVENT_CONTINUE, /* val = resolution in ns */
SND_TIMER_EVENT_PAUSE, /* val = 0 */
SND_TIMER_EVENT_EARLY, /* val = 0 */
SND_TIMER_EVENT_SUSPEND, /* val = 0 */
SND_TIMER_EVENT_RESUME, /* val = resolution in ns */
/* master timer events for slave timer instances */
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
} snd_timer_event_t;
/** timer read structure */
typedef struct _snd_timer_read {
unsigned int resolution; /**< tick resolution in nanoseconds */
unsigned int ticks; /**< count of happened ticks */
} snd_timer_read_t;
/** timer tstamp + event read structure */
typedef struct _snd_timer_tread {
snd_timer_event_t event; /**< Timer event */
snd_htimestamp_t tstamp; /**< Time stamp of each event */
unsigned int val; /**< Event value */
} snd_timer_tread_t;
/** global timer - system */
#define SND_TIMER_GLOBAL_SYSTEM 0
/** global timer - RTC */
#define SND_TIMER_GLOBAL_RTC 1 /* Obsoleted, due to enough legacy. */
/** global timer - HPET */
#define SND_TIMER_GLOBAL_HPET 2
/** global timer - HRTIMER */
#define SND_TIMER_GLOBAL_HRTIMER 3
/** timer open mode flag - non-blocking behaviour */
#define SND_TIMER_OPEN_NONBLOCK (1<<0)
/** use timestamps and event notification - enhanced read */
#define SND_TIMER_OPEN_TREAD (1<<1)
/** timer handle type */
typedef enum _snd_timer_type {
/** Kernel level HwDep */
SND_TIMER_TYPE_HW = 0,
/** Shared memory client timer (not yet implemented) */
SND_TIMER_TYPE_SHM,
/** INET client timer (not yet implemented) */
SND_TIMER_TYPE_INET
} snd_timer_type_t;
/** timer query handle */
typedef struct _snd_timer_query snd_timer_query_t;
/** timer handle */
typedef struct _snd_timer snd_timer_t;
int snd_timer_query_open(snd_timer_query_t **handle, const char *name, int mode);
int snd_timer_query_open_lconf(snd_timer_query_t **handle, const char *name, int mode, snd_config_t *lconf);
int snd_timer_query_close(snd_timer_query_t *handle);
int snd_timer_query_next_device(snd_timer_query_t *handle, snd_timer_id_t *tid);
int snd_timer_query_info(snd_timer_query_t *handle, snd_timer_ginfo_t *info);
int snd_timer_query_params(snd_timer_query_t *handle, snd_timer_gparams_t *params);
int snd_timer_query_status(snd_timer_query_t *handle, snd_timer_gstatus_t *status);
int snd_timer_open(snd_timer_t **handle, const char *name, int mode);
int snd_timer_open_lconf(snd_timer_t **handle, const char *name, int mode, snd_config_t *lconf);
int snd_timer_close(snd_timer_t *handle);
int snd_async_add_timer_handler(snd_async_handler_t **handler, snd_timer_t *timer,
snd_async_callback_t callback, void *private_data);
snd_timer_t *snd_async_handler_get_timer(snd_async_handler_t *handler);
int snd_timer_poll_descriptors_count(snd_timer_t *handle);
int snd_timer_poll_descriptors(snd_timer_t *handle, struct pollfd *pfds, unsigned int space);
int snd_timer_poll_descriptors_revents(snd_timer_t *timer, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
int snd_timer_info(snd_timer_t *handle, snd_timer_info_t *timer);
int snd_timer_params(snd_timer_t *handle, snd_timer_params_t *params);
int snd_timer_status(snd_timer_t *handle, snd_timer_status_t *status);
int snd_timer_start(snd_timer_t *handle);
int snd_timer_stop(snd_timer_t *handle);
int snd_timer_continue(snd_timer_t *handle);
ssize_t snd_timer_read(snd_timer_t *handle, void *buffer, size_t size);
size_t snd_timer_id_sizeof(void);
/** allocate #snd_timer_id_t container on stack */
#define snd_timer_id_alloca(ptr) __snd_alloca(ptr, snd_timer_id)
int snd_timer_id_malloc(snd_timer_id_t **ptr);
void snd_timer_id_free(snd_timer_id_t *obj);
void snd_timer_id_copy(snd_timer_id_t *dst, const snd_timer_id_t *src);
void snd_timer_id_set_class(snd_timer_id_t *id, int dev_class);
int snd_timer_id_get_class(snd_timer_id_t *id);
void snd_timer_id_set_sclass(snd_timer_id_t *id, int dev_sclass);
int snd_timer_id_get_sclass(snd_timer_id_t *id);
void snd_timer_id_set_card(snd_timer_id_t *id, int card);
int snd_timer_id_get_card(snd_timer_id_t *id);
void snd_timer_id_set_device(snd_timer_id_t *id, int device);
int snd_timer_id_get_device(snd_timer_id_t *id);
void snd_timer_id_set_subdevice(snd_timer_id_t *id, int subdevice);
int snd_timer_id_get_subdevice(snd_timer_id_t *id);
size_t snd_timer_ginfo_sizeof(void);
/** allocate #snd_timer_ginfo_t container on stack */
#define snd_timer_ginfo_alloca(ptr) __snd_alloca(ptr, snd_timer_ginfo)
int snd_timer_ginfo_malloc(snd_timer_ginfo_t **ptr);
void snd_timer_ginfo_free(snd_timer_ginfo_t *obj);
void snd_timer_ginfo_copy(snd_timer_ginfo_t *dst, const snd_timer_ginfo_t *src);
int snd_timer_ginfo_set_tid(snd_timer_ginfo_t *obj, snd_timer_id_t *tid);
snd_timer_id_t *snd_timer_ginfo_get_tid(snd_timer_ginfo_t *obj);
unsigned int snd_timer_ginfo_get_flags(snd_timer_ginfo_t *obj);
int snd_timer_ginfo_get_card(snd_timer_ginfo_t *obj);
char *snd_timer_ginfo_get_id(snd_timer_ginfo_t *obj);
char *snd_timer_ginfo_get_name(snd_timer_ginfo_t *obj);
unsigned long snd_timer_ginfo_get_resolution(snd_timer_ginfo_t *obj);
unsigned long snd_timer_ginfo_get_resolution_min(snd_timer_ginfo_t *obj);
unsigned long snd_timer_ginfo_get_resolution_max(snd_timer_ginfo_t *obj);
unsigned int snd_timer_ginfo_get_clients(snd_timer_ginfo_t *obj);
size_t snd_timer_info_sizeof(void);
/** allocate #snd_timer_info_t container on stack */
#define snd_timer_info_alloca(ptr) __snd_alloca(ptr, snd_timer_info)
int snd_timer_info_malloc(snd_timer_info_t **ptr);
void snd_timer_info_free(snd_timer_info_t *obj);
void snd_timer_info_copy(snd_timer_info_t *dst, const snd_timer_info_t *src);
int snd_timer_info_is_slave(snd_timer_info_t * info);
int snd_timer_info_get_card(snd_timer_info_t * info);
const char *snd_timer_info_get_id(snd_timer_info_t * info);
const char *snd_timer_info_get_name(snd_timer_info_t * info);
long snd_timer_info_get_resolution(snd_timer_info_t * info);
size_t snd_timer_params_sizeof(void);
/** allocate #snd_timer_params_t container on stack */
#define snd_timer_params_alloca(ptr) __snd_alloca(ptr, snd_timer_params)
int snd_timer_params_malloc(snd_timer_params_t **ptr);
void snd_timer_params_free(snd_timer_params_t *obj);
void snd_timer_params_copy(snd_timer_params_t *dst, const snd_timer_params_t *src);
int snd_timer_params_set_auto_start(snd_timer_params_t * params, int auto_start);
int snd_timer_params_get_auto_start(snd_timer_params_t * params);
int snd_timer_params_set_exclusive(snd_timer_params_t * params, int exclusive);
int snd_timer_params_get_exclusive(snd_timer_params_t * params);
int snd_timer_params_set_early_event(snd_timer_params_t * params, int early_event);
int snd_timer_params_get_early_event(snd_timer_params_t * params);
void snd_timer_params_set_ticks(snd_timer_params_t * params, long ticks);
long snd_timer_params_get_ticks(snd_timer_params_t * params);
void snd_timer_params_set_queue_size(snd_timer_params_t * params, long queue_size);
long snd_timer_params_get_queue_size(snd_timer_params_t * params);
void snd_timer_params_set_filter(snd_timer_params_t * params, unsigned int filter);
unsigned int snd_timer_params_get_filter(snd_timer_params_t * params);
size_t snd_timer_status_sizeof(void);
/** allocate #snd_timer_status_t container on stack */
#define snd_timer_status_alloca(ptr) __snd_alloca(ptr, snd_timer_status)
int snd_timer_status_malloc(snd_timer_status_t **ptr);
void snd_timer_status_free(snd_timer_status_t *obj);
void snd_timer_status_copy(snd_timer_status_t *dst, const snd_timer_status_t *src);
snd_htimestamp_t snd_timer_status_get_timestamp(snd_timer_status_t * status);
long snd_timer_status_get_resolution(snd_timer_status_t * status);
long snd_timer_status_get_lost(snd_timer_status_t * status);
long snd_timer_status_get_overrun(snd_timer_status_t * status);
long snd_timer_status_get_queue(snd_timer_status_t * status);
/* deprecated functions, for compatibility */
long snd_timer_info_get_ticks(snd_timer_info_t * info);
/** \} */
#ifdef __cplusplus
}
#endif
#endif /** __ALSA_TIMER_H */