mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-26 02:11:36 -04:00
Pegasus
42 lines
1.8 KiB
Python
42 lines
1.8 KiB
Python
"""Guard the title-neutral SPU IRQ scheduling correction.
|
|
|
|
SPU RAM IRQ-address hits can occur more than once per video frame. The runtime
|
|
must let guest code acknowledge and re-arm IRQ9 between 44.1-kHz samples rather
|
|
than rendering a VBlank-sized chunk and collapsing the hits into one latch.
|
|
"""
|
|
|
|
from pathlib import Path
|
|
import re
|
|
|
|
|
|
ROOT = Path(__file__).resolve().parents[2]
|
|
INTERRUPTS = (ROOT / "runtime" / "src" / "interrupts.c").read_text(encoding="utf-8")
|
|
CYCLES = (ROOT / "runtime" / "src" / "psx_cycles.c").read_text(encoding="utf-8")
|
|
MAIN = (ROOT / "runtime" / "src" / "main.cpp").read_text(encoding="utf-8")
|
|
|
|
# Production defaults to faithful per-sample scheduling. Keep only an explicit
|
|
# zero-valued diagnostic opt-out for comparing old captures.
|
|
assert 'getenv("PSX_SPU_SAMPLE_EVENTS")' in INTERRUPTS
|
|
assert 'enabled = (!e || !*e || strcmp(e, "0") != 0) ? 1 : 0;' in INTERRUPTS
|
|
|
|
# The sample boundary must participate in the common device-deadline slicer and
|
|
# be serviced after each charged slice, otherwise the default above is inert.
|
|
assert "psx_spu_sample_event_cycles_to_next()" in CYCLES
|
|
assert "psx_spu_sample_event_service();" in CYCLES
|
|
|
|
# Register and prime the SPU pump in both the visible and headless frontends.
|
|
# A frame-count-only headless smoke must exercise the same sample epoch as the
|
|
# operator build, and the first service must not establish a shifted epoch.
|
|
prime = re.compile(
|
|
r"psx_set_midframe_audio_pump\(sdl_audio_pump_midframe\);"
|
|
r".{0,500}?sdl_audio_pump_midframe\(\);",
|
|
re.DOTALL,
|
|
)
|
|
assert len(prime.findall(MAIN)) >= 2
|
|
assert MAIN.index("if (g_headless) {\n audio_trace_init();") < MAIN.index(
|
|
'std::fprintf(stdout, "psxrecomp: headless frontend enabled\\n");'
|
|
)
|
|
|
|
# One hardware SPU output sample is exactly 768 CPU cycles.
|
|
assert "psx_get_cycle_count() % 768u" in INTERRUPTS
|