timer.h

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/*
 *   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/timer.h> should not be used directly"
#include <alsa/asoundlib.h>
#endif
 
#ifndef __ALSA_TIMER_H
#define __ALSA_TIMER_H
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define SND_TIMER_DLSYM_VERSION     _dlsym_timer_001
#define SND_TIMER_QUERY_DLSYM_VERSION   _dlsym_timer_query_001
 
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 enum _snd_timer_class {
    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  
} snd_timer_class_t;
 
typedef enum _snd_timer_slave_class {
    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  
} snd_timer_slave_class_t;
 
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;
 
typedef struct _snd_timer_read {
    unsigned int resolution;    
        unsigned int ticks;     
} snd_timer_read_t;
 
typedef struct _snd_timer_tread {
    snd_timer_event_t event;    
    snd_htimestamp_t tstamp;    
    unsigned int val;       
} snd_timer_tread_t;
 
#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)
 
typedef enum _snd_timer_type {
    SND_TIMER_TYPE_HW = 0,
    SND_TIMER_TYPE_SHM,
    SND_TIMER_TYPE_INET
} snd_timer_type_t;
 
typedef struct _snd_timer_query snd_timer_query_t;
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);
#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);
#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);
#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);
#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);
#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