mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-25 18:05:12 -04:00
Pegasus
42 lines
1.8 KiB
Python
42 lines
1.8 KiB
Python
"""Guard the title-neutral SPU IRQ scheduling correction.
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SPU RAM IRQ-address hits can occur more than once per video frame. The runtime
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must let guest code acknowledge and re-arm IRQ9 between 44.1-kHz samples rather
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than rendering a VBlank-sized chunk and collapsing the hits into one latch.
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"""
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from pathlib import Path
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import re
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ROOT = Path(__file__).resolve().parents[2]
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INTERRUPTS = (ROOT / "runtime" / "src" / "interrupts.c").read_text(encoding="utf-8")
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CYCLES = (ROOT / "runtime" / "src" / "psx_cycles.c").read_text(encoding="utf-8")
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MAIN = (ROOT / "runtime" / "src" / "main.cpp").read_text(encoding="utf-8")
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# Production defaults to faithful per-sample scheduling. Keep only an explicit
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# zero-valued diagnostic opt-out for comparing old captures.
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assert 'getenv("PSX_SPU_SAMPLE_EVENTS")' in INTERRUPTS
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assert 'enabled = (!e || !*e || strcmp(e, "0") != 0) ? 1 : 0;' in INTERRUPTS
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# The sample boundary must participate in the common device-deadline slicer and
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# be serviced after each charged slice, otherwise the default above is inert.
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assert "psx_spu_sample_event_cycles_to_next()" in CYCLES
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assert "psx_spu_sample_event_service();" in CYCLES
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# Register and prime the SPU pump in both the visible and headless frontends.
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# A frame-count-only headless smoke must exercise the same sample epoch as the
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# operator build, and the first service must not establish a shifted epoch.
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prime = re.compile(
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r"psx_set_midframe_audio_pump\(sdl_audio_pump_midframe\);"
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r".{0,500}?sdl_audio_pump_midframe\(\);",
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re.DOTALL,
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)
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assert len(prime.findall(MAIN)) >= 2
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assert MAIN.index("if (g_headless) {\n audio_trace_init();") < MAIN.index(
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'std::fprintf(stdout, "psxrecomp: headless frontend enabled\\n");'
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)
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# One hardware SPU output sample is exactly 768 CPU cycles.
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assert "psx_get_cycle_count() % 768u" in INTERRUPTS
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