mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-26 02:11:36 -04:00
Matthew Stanley
41 lines
1.4 KiB
C
41 lines
1.4 KiB
C
#ifndef PSX_FRAME_INTERPOLATION_H
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#define PSX_FRAME_INTERPOLATION_H
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct FrameInterpolationSchedule {
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double source_deadline;
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double next_present_deadline;
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double frame_start;
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double frame_end;
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double target_period;
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} FrameInterpolationSchedule;
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/* Plan one stock guest-frame interval. Presentation deadlines remain anchored
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* across calls so guest work consumes part of the interval instead of slowing
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* the simulation. Returns zero when the rates or host clock are invalid. */
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int frame_interpolation_schedule_begin(FrameInterpolationSchedule *schedule,
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uint64_t now, uint64_t frequency,
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double source_hz, double target_hz);
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/* Return each presentation deadline in the current source interval. Alpha is
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* the temporal blend position from the previous completed frame to the current
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* one. Deadlines missed by more than one output period are coalesced. */
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int frame_interpolation_schedule_next(FrameInterpolationSchedule *schedule,
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uint64_t now, uint64_t *deadline,
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float *alpha);
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uint64_t frame_interpolation_schedule_end(
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const FrameInterpolationSchedule *schedule);
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void frame_interpolation_schedule_reset(FrameInterpolationSchedule *schedule);
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#ifdef __cplusplus
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}
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#endif
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#endif
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