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A single 100 ms RMS window above the noise floor used to become its own section, so isolated pops (clicks, single raindrops) flooded a day with thousands of sub-second clips like "21:18 to 21:18". Sections shorter than min_duration (measured after min_gap merging, so a cluster of blips spanning longer still flags) are now discarded. Wired through all coupled places: CLI flag, /api/config, controls-bar input, /api/analyze query param, and the analysis-cache head keys (old two-key caches no longer match and are recomputed on next analyse). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
102 lines
3.6 KiB
Python
102 lines
3.6 KiB
Python
"""Tests for the adaptive loud-section detector in web.py."""
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import math
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from web import _loud_sections, _noise_floor_db
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WINDOW_DUR = 0.1 # 100 ms windows, as produced by WINDOW_SAMPLES at 48 kHz
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def _run(rms, margin_db=12.0, min_gap=2.0, min_duration=0.5):
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duration = len(rms) * WINDOW_DUR
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return _loud_sections(rms, WINDOW_DUR, duration, margin_db, min_gap, min_duration)
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def test_burst_above_quiet_floor_is_detected():
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rms = [0.002] * 1200 # 2 min of quiet ambience (−54 dBFS)
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rms[600:610] = [0.05] * 10 # 1 s burst at −26 dBFS (+28 dB)
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sections = _run(rms)
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assert len(sections) == 1
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s = sections[0]
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assert s['start'] == 60.0
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assert 60.5 <= s['end'] <= 62.0
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assert 26.0 <= s['score'] <= 30.0
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def test_slow_ambience_swell_is_not_detected():
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# Level rises 20 dB over 10 minutes and back down — e.g. rain setting in.
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# The old fixed threshold would have flagged the entire loud half.
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up = [0.002 * 10 ** (i / 6000 * 1.0) for i in range(6000)] # −54 → −34 dB
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down = list(reversed(up))
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assert _run(up + down) == []
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def test_burst_still_detected_on_loud_ambience():
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# Same +28 dB prominence as the quiet test, but on a 20 dB louder floor.
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rms = [0.02] * 1200
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rms[600:610] = [0.5] * 10
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sections = _run(rms)
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assert len(sections) == 1
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assert sections[0]['start'] == 60.0
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def test_min_rms_floor_suppresses_blips_in_digital_silence():
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rms = [0.000001] * 1200
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rms[600:605] = [0.004] * 5 # −48 dBFS: audible blip, but below MIN_RMS+12dB
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assert _run(rms) == []
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rms[600:605] = [0.05] * 5 # −26 dBFS clearly clears the clamped floor
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assert len(_run(rms)) == 1
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def test_min_gap_merges_nearby_bursts():
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rms = [0.002] * 1200
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rms[600:605] = [0.05] * 5
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rms[615:620] = [0.05] * 5 # 1 s gap < 2 s min_gap → one section
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rms[900:905] = [0.05] * 5 # 28 s away → separate section
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sections = _run(rms)
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assert len(sections) == 2
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assert sections[0]['start'] == 60.0
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assert sections[0]['end'] >= 61.5
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assert sections[1]['start'] == 90.0
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def test_min_duration_drops_subsecond_blips():
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# Isolated single-window pops (clicks, single raindrops) spaced wider than
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# min_gap must not each become their own section — this is what used to
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# produce thousands of zero-length sections per day.
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rms = [0.002] * 1200
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for i in range(600, 660, 30): # 0.1 s blips, 3 s apart (> min_gap)
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rms[i] = 0.05
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assert _run(rms) == []
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# With the filter disabled they are all reported
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assert len(_run(rms, min_duration=0.0)) == 2
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def test_min_duration_keeps_sections_at_or_above_it():
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rms = [0.002] * 1200
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rms[600:605] = [0.05] * 5 # exactly 0.5 s
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sections = _run(rms, min_duration=0.5)
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assert len(sections) == 1
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assert sections[0]['start'] == 60.0
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def test_min_duration_applies_after_gap_merging():
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# Two sub-min_duration blips within min_gap merge into one section whose
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# loud span exceeds min_duration — the merged section must survive.
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rms = [0.002] * 1200
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rms[600] = 0.05
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rms[610] = 0.05 # 1 s apart < 2 s min_gap → merged, 1.1 s span
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sections = _run(rms, min_duration=1.0)
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assert len(sections) == 1
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assert sections[0]['start'] == 60.0
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assert sections[0]['end'] >= 61.0
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def test_noise_floor_tracks_blocks_and_ignores_short_events():
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quiet_db = 20 * math.log10(0.002)
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db = [quiet_db] * 1200
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db[600:650] = [-20.0] * 50 # 5 s event must not raise its own floor
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floor = _noise_floor_db(db, WINDOW_DUR)
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assert len(floor) == len(db)
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assert all(abs(f - quiet_db) < 1.0 for f in floor)
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