141 lines
4.3 KiB
Python
141 lines
4.3 KiB
Python
from __future__ import annotations
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import time
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from pathlib import Path
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import numpy as np
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from somafm_tui import spectrum as spectrum_module
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from somafm_tui.spectrum import Frame, SpectrumEngine
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PCM_SCRIPT = """#!/usr/bin/env python3
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import math, struct, sys, time
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sr = 44100
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samples = [int(0.6 * 32767 * math.sin(2 * math.pi * 1000 * i / sr)) for i in range(4096)]
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chunk = struct.pack("<%dh" % len(samples), *samples)
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out = sys.stdout.buffer
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try:
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while True:
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out.write(chunk)
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out.flush()
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time.sleep(0.08)
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except (BrokenPipeError, KeyboardInterrupt):
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pass
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"""
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def write_pcm_script(path: Path) -> None:
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path.write_text(PCM_SCRIPT)
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path.chmod(0o755)
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def wait_for_spectrum(engine: SpectrumEngine, status: str, timeout: float = 6.0):
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deadline = time.monotonic() + timeout
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snap = engine.snapshot()
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while time.monotonic() < deadline:
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snap = engine.snapshot()
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if snap.status == status and sum(snap.bands) > 1.0:
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break
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time.sleep(0.05)
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return snap
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def test_fft_detects_a_1khz_tone() -> None:
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engine = SpectrumEngine(ffmpeg_path="")
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sample_rate = 44100
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t = np.arange(8192) / sample_rate
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tone = np.sin(2 * np.pi * 1000 * t) * 0.5
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engine.feed_pcm((tone * 32767).astype("<i2").tobytes())
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snap = engine.snapshot()
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assert snap.status == "live"
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assert snap.label == "FFT"
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assert len(snap.bands) == 72
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top = max(range(len(snap.bands)), key=lambda index: snap.bands[index])
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expected = 72 * np.log(1000.0 / 35.0) / np.log(16000.0 / 35.0)
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assert abs(top - expected) <= 2
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assert snap.bands[top] > 0.8
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assert snap.peaks[top] >= snap.bands[top] - 1e-6
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assert any(abs(value) > 0.3 for value in snap.wave)
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assert 0.0 < snap.level <= 1.0
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def test_frame_labels() -> None:
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assert Frame((), (), (), 0.0, "monitor").label == "SYNC"
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assert Frame((), (), (), 0.0, "live").label == "FFT"
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assert Frame((), (), (), 0.0, "sim").label == "SIM"
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assert Frame((), (), (), 0.0, "idle").label == "IDLE"
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assert Frame((), (), (), 0.0, "off").label == "OFF"
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assert Frame((), (), (), 0.0, "monitor").is_live is True
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def test_simulation_fallback() -> None:
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engine = SpectrumEngine(ffmpeg_path="", source_mode="sim")
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engine.start()
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try:
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engine.set_source("https://example.invalid/demo")
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deadline = time.monotonic() + 5
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snap = engine.snapshot()
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while time.monotonic() < deadline:
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snap = engine.snapshot()
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if snap.status == "sim" and max(snap.bands) > 0.2:
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break
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time.sleep(0.05)
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assert snap.status == "sim"
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assert snap.label == "SIM"
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assert max(snap.bands) > 0.2
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assert 0.0 <= snap.level <= 1.0
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finally:
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engine.stop()
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def test_monitor_capture_prefers_real_output(tmp_path, monkeypatch) -> None:
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script = tmp_path / "parec"
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write_pcm_script(script)
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def fake_which(name: str) -> str | None:
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return str(script) if name == "parec" else None
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monkeypatch.setattr(spectrum_module.shutil, "which", fake_which)
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engine = SpectrumEngine(source_mode="auto")
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assert engine.monitor_available is True
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engine.start()
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try:
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engine.set_source("https://example.invalid/live")
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snap = wait_for_spectrum(engine, "monitor")
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assert snap.status == "monitor", snap
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assert snap.label == "SYNC"
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top = max(range(len(snap.bands)), key=lambda index: snap.bands[index])
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assert 36 <= top <= 42
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assert snap.bands[top] > 0.5
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engine.set_source(None)
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time.sleep(0.3)
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assert engine.snapshot().status == "idle"
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finally:
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engine.stop()
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def test_stream_tap_pipeline(tmp_path) -> None:
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script = tmp_path / "fake-ffmpeg"
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write_pcm_script(script)
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engine = SpectrumEngine(ffmpeg_path=str(script), source_mode="stream")
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engine.start()
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try:
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engine.set_source("https://example.invalid/stream")
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snap = wait_for_spectrum(engine, "live")
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assert snap.status == "live", snap
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assert snap.label == "FFT"
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top = max(range(len(snap.bands)), key=lambda index: snap.bands[index])
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assert 36 <= top <= 42
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assert snap.bands[top] > 0.5
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engine.set_source(None)
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time.sleep(0.3)
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assert engine.snapshot().status == "idle"
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finally:
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engine.stop()
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