121 lines
4.1 KiB
Python
121 lines
4.1 KiB
Python
import tempfile, os
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import numpy as np
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from core.audio_scan import build_profile, _extract_mfcc, scan_video
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def _make_wav(path: str, duration: float = 8.0, sr: int = 22050):
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"""Create a short sine-wave WAV file for testing."""
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import soundfile as sf
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t = np.linspace(0, duration, int(sr * duration), endpoint=False)
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audio = 0.5 * np.sin(2 * np.pi * 440 * t)
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sf.write(path, audio, sr)
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def test_extract_mfcc_returns_1d_vector():
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with tempfile.NamedTemporaryFile(suffix=".wav", delete=False) as f:
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_make_wav(f.name)
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try:
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vec = _extract_mfcc(f.name)
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assert vec.shape == (20,)
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assert not np.isnan(vec).any()
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finally:
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os.unlink(f.name)
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def test_build_profile_single_clip():
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with tempfile.NamedTemporaryFile(suffix=".wav", delete=False) as f:
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_make_wav(f.name)
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try:
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profile = build_profile([f.name])
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assert "mean_vector" in profile
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assert "clip_vectors" in profile
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assert profile["mean_vector"].shape == (20,)
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assert len(profile["clip_vectors"]) == 1
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finally:
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os.unlink(f.name)
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def test_build_profile_multiple_clips():
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paths = []
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try:
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for i in range(3):
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f = tempfile.NamedTemporaryFile(suffix=".wav", delete=False)
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freq = 440 + i * 200
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import soundfile as sf
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t = np.linspace(0, 8.0, 22050 * 8, endpoint=False)
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sf.write(f.name, 0.5 * np.sin(2 * np.pi * freq * t), 22050)
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paths.append(f.name)
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f.close()
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profile = build_profile(paths)
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assert len(profile["clip_vectors"]) == 3
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assert profile["mean_vector"].shape == (20,)
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finally:
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for p in paths:
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os.unlink(p)
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def test_build_profile_skips_missing_files():
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with tempfile.NamedTemporaryFile(suffix=".wav", delete=False) as f:
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_make_wav(f.name)
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try:
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profile = build_profile([f.name, "/no/such/file.wav"])
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assert len(profile["clip_vectors"]) == 1
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finally:
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os.unlink(f.name)
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def test_build_profile_empty_returns_none():
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result = build_profile([])
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assert result is None
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def test_scan_video_finds_matching_region():
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"""A video made of the same sine wave as the reference should match."""
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with tempfile.NamedTemporaryFile(suffix=".wav", delete=False) as ref:
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_make_wav(ref.name, duration=8.0)
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with tempfile.NamedTemporaryFile(suffix=".wav", delete=False) as vid:
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_make_wav(vid.name, duration=20.0)
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try:
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profile = build_profile([ref.name])
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regions = scan_video(vid.name, profile, mode="average", threshold=0.5, hop=1.0)
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assert len(regions) > 0
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for start, end, score in regions:
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assert abs((end - start) - 8.0) < 1e-9
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assert score >= 0.5
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finally:
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os.unlink(ref.name)
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os.unlink(vid.name)
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def test_scan_video_nearest_mode():
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with tempfile.NamedTemporaryFile(suffix=".wav", delete=False) as ref:
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_make_wav(ref.name, duration=8.0)
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with tempfile.NamedTemporaryFile(suffix=".wav", delete=False) as vid:
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_make_wav(vid.name, duration=20.0)
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try:
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profile = build_profile([ref.name])
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regions = scan_video(vid.name, profile, mode="nearest", threshold=0.5, hop=1.0)
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assert len(regions) > 0
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finally:
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os.unlink(ref.name)
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os.unlink(vid.name)
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def test_scan_video_high_threshold_no_match():
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"""Different frequencies with very high threshold should not match."""
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import soundfile as sf
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with tempfile.NamedTemporaryFile(suffix=".wav", delete=False) as ref:
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t = np.linspace(0, 8.0, 22050 * 8, endpoint=False)
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sf.write(ref.name, 0.5 * np.sin(2 * np.pi * 440 * t), 22050)
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with tempfile.NamedTemporaryFile(suffix=".wav", delete=False) as vid:
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# White noise — very different from sine wave
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sf.write(vid.name, np.random.randn(22050 * 20).astype(np.float32) * 0.1, 22050)
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try:
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profile = build_profile([ref.name])
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regions = scan_video(vid.name, profile, mode="average", threshold=0.99, hop=1.0)
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assert len(regions) == 0
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finally:
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os.unlink(ref.name)
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os.unlink(vid.name)
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