include/yasl/timing.h


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#ifndef YASL_TIMING_H
#define YASL_TIMING_H

#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

struct yasl_resize_stats {
    uint64_t count;
    double avg_us;
    double max_us;
    long minflt;
};

/* Describes last_present_ns, not merely availability of an extension. */
enum yasl_timing_source {
    YASL_TIMING_UNKNOWN = 0,
    YASL_TIMING_SUBMISSION, /* CPU submission time; not scanout confirmation */
    YASL_TIMING_FRAME_CALLBACK, /* compositor pacing callback, not scanout */
    YASL_TIMING_PRESENTATION, /* compositor-confirmed presentation */
};

struct yasl_timing {
    double refresh_ns;
    uint64_t last_present_ns;
    uint64_t next_present_ns;
    uint64_t frames_skipped;
    enum yasl_timing_source source;
    struct yasl_resize_stats resize;
};

#ifdef __cplusplus
}
#endif

#endif /* YASL_TIMING_H */