43 lines
1 KiB
C++
43 lines
1 KiB
C++
#ifndef _framerate__hpp__included__
|
|
#define _framerate__hpp__included__
|
|
|
|
#include <cstdint>
|
|
|
|
/**
|
|
* Nominal framerate of NTSC SNES.
|
|
*/
|
|
#define FRAMERATE_SNES_NTSC (10738636.0/178683.0)
|
|
/**
|
|
* Nominal framerate of PAL SNES.
|
|
*/
|
|
#define FRAMERATE_SNES_PAL (322445.0/6448.0)
|
|
|
|
/**
|
|
* Sets the nominal frame rate. Framerate limiting tries to maintain the nominal framerate when there is no other
|
|
* explict framerate to maintain.
|
|
*/
|
|
void set_nominal_framerate(double fps) throw();
|
|
|
|
/**
|
|
* Returns the current realized framerate.
|
|
*
|
|
* returns: The framerate the system is currently archiving.
|
|
*/
|
|
double get_framerate() throw();
|
|
|
|
/**
|
|
* Acknowledge frame start for timing purposes.
|
|
*
|
|
* parameter msec: Current time (relative to some unknown epoch) in milliseconds.
|
|
*/
|
|
void ack_frame_tick(uint64_t msec) throw();
|
|
|
|
/**
|
|
* Computes the number of milliseconds to wait for next frame.
|
|
*
|
|
* parameter msec: Current time (relative to some unknown epoch) in milliseconds.
|
|
* returns: Number of more milliseconds to wait.
|
|
*/
|
|
uint64_t to_wait_frame(uint64_t msec) throw();
|
|
|
|
#endif
|