mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-26 10:19:47 -04:00
Matthew Stanley
3f3cfb7571
Import the supplied developer handoff against 03e635e8. Include regional capability controls, texture validation, SHA acceleration with portable fallback, SPU CD/XA correction, and overlay export/staging fixes. Validated with rebuilt EU runtime, guarded AOT audit and focused regressions.
30 lines
1.3 KiB
C
30 lines
1.3 KiB
C
#ifndef PSX_FAST_FORWARD_H
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#define PSX_FAST_FORWARD_H
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#include <math.h>
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#include <stdlib.h>
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#include <string.h>
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/* User preference: tenths of real time, 1.0..5.0. No guest-clock change when
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* inactive; the host divides its wall-clock wait only while forwarding. */
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static inline double psx_fast_forward_preference(double value) {
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if (!isfinite(value)) return 4.0;
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if (value < 1.0) value = 1.0;
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if (value > 5.0) value = 5.0;
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return floor(value * 10.0 + 0.5) / 10.0;
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}
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static inline double psx_fast_forward_target(double preference, const char *env) {
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if (!env || !*env) return psx_fast_forward_preference(preference);
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if (!strcmp(env,"max") || !strcmp(env,"MAX") || !strcmp(env,"0")) return -1.0;
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char *end;
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const double value = strtod(env, &end);
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/* Preserve the developer override's wider range without truncating it. */
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return end != env && !*end && isfinite(value) && value >= 1.0 && value <= 16.0
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? floor(value * 10.0 + 0.5) / 10.0 : psx_fast_forward_preference(preference);
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}
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static inline int psx_fast_forward_present_every(double factor) {
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/* Keep accelerated render submissions at/below the stock cadence, also
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* on a 50 Hz panel with VSync. 1x must not discard alternate frames. */
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return factor < 0.0 ? 4 : (int)ceil(factor);
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}
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#endif
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