#ifndef AVTIMER_H
#define AVTIMER_H

#include <unistd.h>
#include <stdlib.h>

//************************************************************//
//***************** define status of a timer *****************//
//************************************************************//
#define TIMER_STATUS_START 0x55
#define TIMER_STATUS_STOP  0xaa

typedef struct AvTimer AvTimer;
struct AvTimer
{
	//* set clock counting speed.
	int (*SetSpeed)(AvTimer* t, int speed);

	//* get the current counting speed.
	int (*GetSpeed)(AvTimer* t);

	//* set time.
	int (*SetTime)(AvTimer* t, int64_t time);

	//* get the current time.
	int64_t (*GetTime)(AvTimer* t);

	//* trasform pts to system time
	int64_t (*PtsToSystemTime)(AvTimer* t, int64_t pts);

	//* run the timer, start clock counting at 'start_time' and running at speed 'speed'.
	int (*Start)(AvTimer* t);

	//* stop the timer.
	void (*Stop)(AvTimer* t);

	int (*GetStatus)(AvTimer* t);
};

//* create a timer, which is implemented in file 'avtimer.c'.
AvTimer* AvTimerCreate(void);

void AvTimerDestroy(AvTimer*);

#endif