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#ifndef __TIMER_H
#define __TIMER_H
/*
* Timer abstract layer
* Copyright (c) by Jaroslav Kysela <perex@jcu.cz>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#define SND_TIMER_DEVICES 16
#define SND_TIMER_FLG_USED 0x00000001
#define SND_TIMER_FLG_SYSTEM 0x00000002 /* system timer */
#define SND_TIMER_FLG_RUNNING 0x00000004
typedef void (*snd_timer_callback_t)( snd_timer_t *timer, void *data );
struct snd_stru_timer_hardware {
/* -- must be filled with low-level driver */
unsigned int resolution; /* average timer resolution for one tick in nsec */
unsigned int low_ticks; /* low timer ticks (usually 1) */
unsigned int high_ticks; /* high timer ticks */
/* -- low-level functions -- */
int (*open)( snd_timer_t *timer );
void (*close)( snd_timer_t *timer );
unsigned int (*c_resolution)( snd_timer_t *timer );
void (*start)( snd_timer_t *timer );
void (*stop)( snd_timer_t *timer );
void (*t_continue)( snd_timer_t *timer );
};
struct snd_stru_timer {
snd_card_t *card;
char id[32];
char name[80];
unsigned int flags;
char *owner;
struct snd_stru_timer_hardware hw;
void *private_data;
void (*private_free)( void *private_data );
snd_timer_callback_t callback;
void *callback_data;
unsigned int ticks;
unsigned int cticks;
};
/*
* Registering
*/
extern snd_timer_t *snd_timer_new_device( snd_card_t *card, char *id );
extern int snd_timer_free( snd_timer_t *timer );
extern int snd_timer_register( snd_timer_t *timer );
extern int snd_timer_unregister( snd_timer_t *timer );
extern snd_timer_t *snd_timer_open( char *owner, unsigned int resolution );
extern int snd_timer_close( snd_timer_t *timer );
extern unsigned int snd_timer_resolution( snd_timer_t *timer );
extern void snd_timer_start( snd_timer_t *timer, unsigned int ticks );
extern void snd_timer_stop( snd_timer_t *timer );
extern void snd_timer_continue( snd_timer_t *timer );
extern snd_timer_t *snd_timer_open_always( char *owner, unsigned int resolution );
extern int snd_timer_close_always( snd_timer_t *timer );
extern unsigned int snd_timer_system_resolution( void );
extern snd_timer_t *snd_timer_open_system( char *owner );
extern int snd_timer_close_system( snd_timer_t *timer );
#endif /* __TIMER_H */
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