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https://github.com/kuhyx/screen-locker.git
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Krzysztof kuhy Rudnicki
9641906818
Back up and restore the pace target (null or absent = off, a stale target is cleared). Mirror comments in run_math and friends now state the PC's merged rule and where the app is stricter. Pace tones get MANIFEST entries; default map and backup get tests. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01WzxdWXcjiPpgRfxzrRfoky
96 lines
3.3 KiB
Python
96 lines
3.3 KiB
Python
"""Render the two pace-cue tones with the standard library only.
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Falling tone (``pace_slow.wav``): speed up. Rising tone (``pace_fast.wav``):
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ease off. Each is two soft sine notes with a fast attack and a linear fade so
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nothing clicks. They sit apart in pitch and direction, so they can be told
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apart with the screen off and the phone in a pocket (the vibration pattern is
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the second channel).
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Usage: ``render_pace_tones.py OUT_DIR`` writes both files into OUT_DIR and
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adds their entries (recipe, frame count, SHA-256) to OUT_DIR/MANIFEST.json,
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leaving the other entries (the finish chime's) as they are. Standard library
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only, so there is no toolkit to pin and no ``.sh`` wrapper.
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"""
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from __future__ import annotations
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import hashlib
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import json
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import math
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from pathlib import Path
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import struct
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import sys
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import wave
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SAMPLE_RATE = 44100
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PEAK = 0.6
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ATTACK_SECONDS = 0.01
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# (frequency in Hz, seconds) per note.
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SLOW_NOTES = ((494.0, 0.22), (370.0, 0.34))
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FAST_NOTES = ((880.0, 0.11), (1319.0, 0.17))
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ARG_COUNT = 2
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def _note(freq: float, seconds: float) -> list[float]:
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"""One sine note with an attack ramp and a linear fade to zero."""
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count = int(SAMPLE_RATE * seconds)
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attack = int(SAMPLE_RATE * ATTACK_SECONDS)
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samples = []
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for i in range(count):
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gain = min(1.0, i / attack) * (1 - i / count)
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samples.append(PEAK * gain * math.sin(2 * math.pi * freq * i / SAMPLE_RATE))
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return samples
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def render(path: Path, notes: tuple[tuple[float, float], ...]) -> dict[str, object]:
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"""Write ``notes`` back to back as a 16-bit mono WAV; return its manifest entry."""
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samples = [s for freq, seconds in notes for s in _note(freq, seconds)]
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with wave.Wave_write(str(path)) as out:
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out.setnchannels(1)
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out.setsampwidth(2)
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out.setframerate(SAMPLE_RATE)
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out.writeframes(b"".join(struct.pack("<h", int(s * 32767)) for s in samples))
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return {
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"file": path.name,
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"frames": len(samples),
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"recipe": {
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"attack_seconds": ATTACK_SECONDS,
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"notes": [list(note) for note in notes],
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"peak": PEAK,
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"sample_rate": SAMPLE_RATE,
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},
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"sample_rate": SAMPLE_RATE,
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"seconds": round(len(samples) / SAMPLE_RATE, 2),
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"sha256": hashlib.sha256(path.read_bytes()).hexdigest(),
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}
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def update_manifest(path: Path, entries: dict[str, dict[str, object]]) -> None:
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"""Merge ``entries`` into the JSON manifest at ``path``, keeping the rest."""
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manifest: dict[str, object] = (
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json.loads(path.read_text(encoding="utf-8")) if path.exists() else {}
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)
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manifest.update(entries)
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path.write_text(
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json.dumps(manifest, indent=2, sort_keys=True) + "\n", encoding="utf-8"
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)
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def main(argv: list[str]) -> int:
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"""Render both tones into the directory named by ``argv[1]``."""
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if len(argv) != ARG_COUNT:
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sys.stderr.write("usage: render_pace_tones.py OUT_DIR\n")
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return 2
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out = Path(argv[1])
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out.mkdir(parents=True, exist_ok=True)
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entries = {
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"pace_slow.wav": render(out / "pace_slow.wav", SLOW_NOTES),
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"pace_fast.wav": render(out / "pace_fast.wav", FAST_NOTES),
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}
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update_manifest(out / "MANIFEST.json", entries)
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return 0
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if __name__ == "__main__":
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raise SystemExit(main(sys.argv))
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