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   1 #ifndef _FPS_COUNTER_H_
   2 #define _FPS_COUNTER_H_
   3
   4 typedef struct fps_counter {
   5         unsigned long sample_interval;
   6         unsigned long sample_start_time;
   7         unsigned long frame_count;
   8         float fps;
   9 } fps_counter;
  10
  11 #ifdef __cplusplus
  12 extern "C" {
  13 #endif  /* __cplusplus */
  14
  15 void fps_start(fps_counter *fpsc, unsigned long time, unsigned long sample_interval);
  16 int fps_frame_proc(fps_counter *fpsc, unsigned long time);
  17 const char *fps_get_frame_rate_str(fps_counter *fpsc);
  18
  19 #define fps_get_frame_rate(fpsc) (fpsc)->fps
  20
  21 #ifdef __cplusplus
  22 }
  23 #endif  /* __cplusplus */
  24
  25 #endif  /* _FPS_COUNTER_H_ */