LibretroAdmin 8654ecad07 tools/determinism: frames the frontend does not show, as fast-forward and RetroArch's run-ahead have them ...

RetroArch's run-ahead tells the core, through GET_AUDIO_VIDEO_ENABLE,
that the frames it keeps are not shown - only the frames it runs ahead
are - and the core does not draw a render to the screen that is not
shown (rend_skip_screen()). Nothing checked that a frame not drawn
leaves the machine as a frame drawn does, which is what makes run-ahead
exact: "ahead" ran every frame as a shown one.

Two more runs, in the default set:
  hidden    plain's, every frame not shown (fast-forward's frameskip)
  raahead   ahead's, the frames kept not shown and the frames run ahead
            shown, as RetroArch has them
Both leave the pictures out (a frame not shown has none). DET_HIDE
("all", "ahead") says it to detcheck.

Virtua Fighter 4, which draws each frame again into a texture in the
next, is the same in both, 100 frames from vf4.state.

2026-10-24 06:02:06 +02:00

..

detcheck.c

tools/determinism: frames the frontend does not show, as fast-forward and RetroArch's run-ahead have them

2026-10-24 06:02:06 +02:00

detcheck.sh

tools/determinism: frames the frontend does not show, as fast-forward and RetroArch's run-ahead have them

2026-10-24 06:02:06 +02:00

nogl.c

tools/determinism: is the core deterministic, as netplay needs

2026-10-23 11:48:55 +02:00