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259 lines
11 KiB
C
259 lines
11 KiB
C
/**
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* \file include/timer.h
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* \brief Application interface library for the ALSA driver
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* \author Jaroslav Kysela <perex@perex.cz>
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* \author Abramo Bagnara <abramo@alsa-project.org>
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* \author Takashi Iwai <tiwai@suse.de>
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* \date 1998-2001
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*
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* Application interface library for the ALSA driver
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*/
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/*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifndef __ALSA_TIMER_H
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#define __ALSA_TIMER_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \defgroup Timer Timer Interface
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* Timer Interface. See \ref timer page for more details.
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* \{
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*/
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/** dlsym version for interface entry callback */
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#define SND_TIMER_DLSYM_VERSION _dlsym_timer_001
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/** dlsym version for interface entry callback */
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#define SND_TIMER_QUERY_DLSYM_VERSION _dlsym_timer_query_001
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/** timer identification structure */
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typedef struct _snd_timer_id snd_timer_id_t;
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/** timer global info structure */
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typedef struct _snd_timer_ginfo snd_timer_ginfo_t;
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/** timer global params structure */
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typedef struct _snd_timer_gparams snd_timer_gparams_t;
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/** timer global status structure */
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typedef struct _snd_timer_gstatus snd_timer_gstatus_t;
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/** timer info structure */
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typedef struct _snd_timer_info snd_timer_info_t;
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/** timer params structure */
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typedef struct _snd_timer_params snd_timer_params_t;
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/** timer status structure */
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typedef struct _snd_timer_status snd_timer_status_t;
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/** timer master class */
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typedef enum _snd_timer_class {
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SND_TIMER_CLASS_NONE = -1, /**< invalid */
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SND_TIMER_CLASS_SLAVE = 0, /**< slave timer */
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SND_TIMER_CLASS_GLOBAL, /**< global timer */
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SND_TIMER_CLASS_CARD, /**< card timer */
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SND_TIMER_CLASS_PCM, /**< PCM timer */
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SND_TIMER_CLASS_LAST = SND_TIMER_CLASS_PCM /**< last timer */
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} snd_timer_class_t;
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/** timer slave class */
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typedef enum _snd_timer_slave_class {
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SND_TIMER_SCLASS_NONE = 0, /**< none */
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SND_TIMER_SCLASS_APPLICATION, /**< for internal use */
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SND_TIMER_SCLASS_SEQUENCER, /**< sequencer timer */
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SND_TIMER_SCLASS_OSS_SEQUENCER, /**< OSS sequencer timer */
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SND_TIMER_SCLASS_LAST = SND_TIMER_SCLASS_OSS_SEQUENCER /**< last slave timer */
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} snd_timer_slave_class_t;
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/** timer read event identification */
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typedef enum _snd_timer_event {
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SND_TIMER_EVENT_RESOLUTION = 0, /* val = resolution in ns */
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SND_TIMER_EVENT_TICK, /* val = ticks */
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SND_TIMER_EVENT_START, /* val = resolution in ns */
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SND_TIMER_EVENT_STOP, /* val = 0 */
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SND_TIMER_EVENT_CONTINUE, /* val = resolution in ns */
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SND_TIMER_EVENT_PAUSE, /* val = 0 */
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SND_TIMER_EVENT_EARLY, /* val = 0 */
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SND_TIMER_EVENT_SUSPEND, /* val = 0 */
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SND_TIMER_EVENT_RESUME, /* val = resolution in ns */
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/* master timer events for slave timer instances */
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SND_TIMER_EVENT_MSTART = SND_TIMER_EVENT_START + 10,
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SND_TIMER_EVENT_MSTOP = SND_TIMER_EVENT_STOP + 10,
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SND_TIMER_EVENT_MCONTINUE = SND_TIMER_EVENT_CONTINUE + 10,
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SND_TIMER_EVENT_MPAUSE = SND_TIMER_EVENT_PAUSE + 10,
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SND_TIMER_EVENT_MSUSPEND = SND_TIMER_EVENT_SUSPEND + 10,
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SND_TIMER_EVENT_MRESUME = SND_TIMER_EVENT_RESUME + 10
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} snd_timer_event_t;
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/** timer read structure */
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typedef struct _snd_timer_read {
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unsigned int resolution; /**< tick resolution in nanoseconds */
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unsigned int ticks; /**< count of happened ticks */
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} snd_timer_read_t;
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/** timer tstamp + event read structure */
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typedef struct _snd_timer_tread {
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snd_timer_event_t event; /**< Timer event */
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snd_htimestamp_t tstamp; /**< Time stamp of each event */
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unsigned int val; /**< Event value */
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} snd_timer_tread_t;
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/** global timer - system */
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#define SND_TIMER_GLOBAL_SYSTEM 0
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/** global timer - RTC */
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#define SND_TIMER_GLOBAL_RTC 1 /* Obsoleted, due to enough legacy. */
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/** global timer - HPET */
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#define SND_TIMER_GLOBAL_HPET 2
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/** global timer - HRTIMER */
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#define SND_TIMER_GLOBAL_HRTIMER 3
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/** timer open mode flag - non-blocking behaviour */
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#define SND_TIMER_OPEN_NONBLOCK (1<<0)
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/** use timestamps and event notification - enhanced read */
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#define SND_TIMER_OPEN_TREAD (1<<1)
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/** timer handle type */
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typedef enum _snd_timer_type {
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/** Kernel level HwDep */
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SND_TIMER_TYPE_HW = 0,
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/** Shared memory client timer (not yet implemented) */
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SND_TIMER_TYPE_SHM,
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/** INET client timer (not yet implemented) */
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SND_TIMER_TYPE_INET
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} snd_timer_type_t;
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/** timer query handle */
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typedef struct _snd_timer_query snd_timer_query_t;
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/** timer handle */
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typedef struct _snd_timer snd_timer_t;
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int snd_timer_query_open(snd_timer_query_t **handle, const char *name, int mode);
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int snd_timer_query_open_lconf(snd_timer_query_t **handle, const char *name, int mode, snd_config_t *lconf);
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int snd_timer_query_close(snd_timer_query_t *handle);
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int snd_timer_query_next_device(snd_timer_query_t *handle, snd_timer_id_t *tid);
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int snd_timer_query_info(snd_timer_query_t *handle, snd_timer_ginfo_t *info);
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int snd_timer_query_params(snd_timer_query_t *handle, snd_timer_gparams_t *params);
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int snd_timer_query_status(snd_timer_query_t *handle, snd_timer_gstatus_t *status);
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int snd_timer_open(snd_timer_t **handle, const char *name, int mode);
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int snd_timer_open_lconf(snd_timer_t **handle, const char *name, int mode, snd_config_t *lconf);
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int snd_timer_close(snd_timer_t *handle);
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int snd_async_add_timer_handler(snd_async_handler_t **handler, snd_timer_t *timer,
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snd_async_callback_t callback, void *private_data);
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snd_timer_t *snd_async_handler_get_timer(snd_async_handler_t *handler);
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int snd_timer_poll_descriptors_count(snd_timer_t *handle);
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int snd_timer_poll_descriptors(snd_timer_t *handle, struct pollfd *pfds, unsigned int space);
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int snd_timer_poll_descriptors_revents(snd_timer_t *timer, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
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int snd_timer_info(snd_timer_t *handle, snd_timer_info_t *timer);
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int snd_timer_params(snd_timer_t *handle, snd_timer_params_t *params);
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int snd_timer_status(snd_timer_t *handle, snd_timer_status_t *status);
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int snd_timer_start(snd_timer_t *handle);
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int snd_timer_stop(snd_timer_t *handle);
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int snd_timer_continue(snd_timer_t *handle);
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ssize_t snd_timer_read(snd_timer_t *handle, void *buffer, size_t size);
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size_t snd_timer_id_sizeof(void);
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/** allocate #snd_timer_id_t container on stack */
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#define snd_timer_id_alloca(ptr) __snd_alloca(ptr, snd_timer_id)
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int snd_timer_id_malloc(snd_timer_id_t **ptr);
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void snd_timer_id_free(snd_timer_id_t *obj);
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void snd_timer_id_copy(snd_timer_id_t *dst, const snd_timer_id_t *src);
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void snd_timer_id_set_class(snd_timer_id_t *id, int dev_class);
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int snd_timer_id_get_class(snd_timer_id_t *id);
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void snd_timer_id_set_sclass(snd_timer_id_t *id, int dev_sclass);
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int snd_timer_id_get_sclass(snd_timer_id_t *id);
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void snd_timer_id_set_card(snd_timer_id_t *id, int card);
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int snd_timer_id_get_card(snd_timer_id_t *id);
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void snd_timer_id_set_device(snd_timer_id_t *id, int device);
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int snd_timer_id_get_device(snd_timer_id_t *id);
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void snd_timer_id_set_subdevice(snd_timer_id_t *id, int subdevice);
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int snd_timer_id_get_subdevice(snd_timer_id_t *id);
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size_t snd_timer_ginfo_sizeof(void);
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/** allocate #snd_timer_ginfo_t container on stack */
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#define snd_timer_ginfo_alloca(ptr) __snd_alloca(ptr, snd_timer_ginfo)
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int snd_timer_ginfo_malloc(snd_timer_ginfo_t **ptr);
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void snd_timer_ginfo_free(snd_timer_ginfo_t *obj);
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void snd_timer_ginfo_copy(snd_timer_ginfo_t *dst, const snd_timer_ginfo_t *src);
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int snd_timer_ginfo_set_tid(snd_timer_ginfo_t *obj, snd_timer_id_t *tid);
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snd_timer_id_t *snd_timer_ginfo_get_tid(snd_timer_ginfo_t *obj);
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unsigned int snd_timer_ginfo_get_flags(snd_timer_ginfo_t *obj);
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int snd_timer_ginfo_get_card(snd_timer_ginfo_t *obj);
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char *snd_timer_ginfo_get_id(snd_timer_ginfo_t *obj);
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char *snd_timer_ginfo_get_name(snd_timer_ginfo_t *obj);
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unsigned long snd_timer_ginfo_get_resolution(snd_timer_ginfo_t *obj);
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unsigned long snd_timer_ginfo_get_resolution_min(snd_timer_ginfo_t *obj);
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unsigned long snd_timer_ginfo_get_resolution_max(snd_timer_ginfo_t *obj);
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unsigned int snd_timer_ginfo_get_clients(snd_timer_ginfo_t *obj);
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size_t snd_timer_info_sizeof(void);
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/** allocate #snd_timer_info_t container on stack */
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#define snd_timer_info_alloca(ptr) __snd_alloca(ptr, snd_timer_info)
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int snd_timer_info_malloc(snd_timer_info_t **ptr);
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void snd_timer_info_free(snd_timer_info_t *obj);
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void snd_timer_info_copy(snd_timer_info_t *dst, const snd_timer_info_t *src);
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int snd_timer_info_is_slave(snd_timer_info_t * info);
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int snd_timer_info_get_card(snd_timer_info_t * info);
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const char *snd_timer_info_get_id(snd_timer_info_t * info);
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const char *snd_timer_info_get_name(snd_timer_info_t * info);
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long snd_timer_info_get_resolution(snd_timer_info_t * info);
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size_t snd_timer_params_sizeof(void);
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/** allocate #snd_timer_params_t container on stack */
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#define snd_timer_params_alloca(ptr) __snd_alloca(ptr, snd_timer_params)
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int snd_timer_params_malloc(snd_timer_params_t **ptr);
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void snd_timer_params_free(snd_timer_params_t *obj);
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void snd_timer_params_copy(snd_timer_params_t *dst, const snd_timer_params_t *src);
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int snd_timer_params_set_auto_start(snd_timer_params_t * params, int auto_start);
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int snd_timer_params_get_auto_start(snd_timer_params_t * params);
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int snd_timer_params_set_exclusive(snd_timer_params_t * params, int exclusive);
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int snd_timer_params_get_exclusive(snd_timer_params_t * params);
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int snd_timer_params_set_early_event(snd_timer_params_t * params, int early_event);
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int snd_timer_params_get_early_event(snd_timer_params_t * params);
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void snd_timer_params_set_ticks(snd_timer_params_t * params, long ticks);
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long snd_timer_params_get_ticks(snd_timer_params_t * params);
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void snd_timer_params_set_queue_size(snd_timer_params_t * params, long queue_size);
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long snd_timer_params_get_queue_size(snd_timer_params_t * params);
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void snd_timer_params_set_filter(snd_timer_params_t * params, unsigned int filter);
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unsigned int snd_timer_params_get_filter(snd_timer_params_t * params);
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size_t snd_timer_status_sizeof(void);
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/** allocate #snd_timer_status_t container on stack */
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#define snd_timer_status_alloca(ptr) __snd_alloca(ptr, snd_timer_status)
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int snd_timer_status_malloc(snd_timer_status_t **ptr);
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void snd_timer_status_free(snd_timer_status_t *obj);
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void snd_timer_status_copy(snd_timer_status_t *dst, const snd_timer_status_t *src);
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snd_htimestamp_t snd_timer_status_get_timestamp(snd_timer_status_t * status);
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long snd_timer_status_get_resolution(snd_timer_status_t * status);
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long snd_timer_status_get_lost(snd_timer_status_t * status);
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long snd_timer_status_get_overrun(snd_timer_status_t * status);
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long snd_timer_status_get_queue(snd_timer_status_t * status);
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/* deprecated functions, for compatibility */
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long snd_timer_info_get_ticks(snd_timer_info_t * info);
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/** \} */
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#ifdef __cplusplus
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}
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#endif
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#endif /** __ALSA_TIMER_H */
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