def test_crossfade(var, benchmark):
w1, p1, e1 = var
dict: UserDict = UserDict()
dict["wave"], dict["partition"] = w1, p1
mt1 = MultiTrack(dict)
w2 = Wave(value=np.arange(0, 50), fs=1)
p2 = Partition(
np.array([0, 15, 20, 50], dtype=np.int64),
np.array(["start", "middle", "end"]),
1,
)
dict = UserDict()
dict["wave"], dict["partition"] = w2, p2
mt2 = MultiTrack(dict)
mt3 = benchmark(mt1.crossfade, mt2, 5)
assert mt3.duration == mt1.duration + mt2.duration - 5
assert mt3["wave"] == Wave(
value=np.r_[np.arange(45), np.array([37, 31, 24, 18, 11]), np.arange(5, 50)],
fs=1,
)
assert mt3["partition"] == Partition(
np.array([0, 15, 20, 48, 60, 65, 95], dtype=np.int64),
np.array(["start", "middle", "end", "start", "middle", "end"]),
1,
)
def test_crossfade(benchmark):
wav1 = Wave(np.array([1, 1, 1, 1, 1]), 1)
wav2 = Wave(np.array([10, 10, 10, 10, 10]), 1)
length = 3
wav = benchmark(wav1.crossfade, wav2, length)
assert wav1.duration + wav2.duration - length, wav.duration
assert np.allclose(wav.value.flatten(), np.array([1, 1, 3, 5, 7, 10, 10]))
def var():
w = Wave(value=np.arange(0, 50), fs=1)
p = Partition(
np.array([0, 15, 20, 50], dtype=np.int64),
np.array(["start", "middle", "end"]),
1,
)
e = Event(np.array([0, 10, 30]).astype(np.int64), 1, 50)
return w, p, e
def test_select(var, benchmark):
dict: UserDict = UserDict()
dict["wave"], dict["partition"], dict["event"] = var
mt = MultiTrack(dict)
new_mt = benchmark(mt.select, 10, 24)
assert new_mt["wave"] == Wave(value=np.arange(10, 24), fs=1)
assert new_mt["partition"] == Partition(
np.array([0, 5, 10, 14], dtype=np.int64),
np.array(["start", "middle", "end"]),
1,
)
def read_edf(cls, path):
raise NotImplementedError
# TODO: adapt
# the following is copied from elsewhere and won't work as is
import pyedflib
with pyedflib.EdfReader(str(path)) as f:
labels = f.getSignalLabels()
for label in labels:
index = labels.index(label)
wav = Wave(f.readSignal(index), f.getSampleFrequency(index))
wav.label = label
wav.path = f.with_name(f.stem + "-" + label + ".wav")
wav.min = f.getPhysicalMinimum(index)
wav.max = f.getPhysicalMaximum(index)
wav.unit = f.getPhysicalDimension(index)
def spectral_subtract(inp: Wave, frame_rate: int, silence_percentage: int) -> Wave:
assert 0 < silence_percentage < 100
ftr = frame(inp, frame_rate * 2, frame_rate)
x = ftr.value * signal.hann(ftr.value.shape[1])
X = fft(x, 2 ** nextpow2(x.shape[1]))
M = np.abs(X)
E = np.mean(M ** 2, axis=1)
threshold = stats.scoreatpercentile(E, silence_percentage)
index = np.where(E < threshold)[0]
noise_profile = np.median(M[index], axis=0)
M -= noise_profile
np.clip(
M, 0, None, out=M
) # limit this to a value greater than 0 to avoid -inf due to the following log
Y = M * np.exp(1j * np.angle(X)) # DEBUG
y = ifft(Y).real
s = ola(y, inp.fs, inp.duration, frame_rate * 2, frame_rate)
return Wave(s, inp.fs)
def process(
self,
progressTracker: Optional[DefaultProgressTracker] = None
) -> Tuple[Wave]:
# Processor.process(self, **kwargs)
if progressTracker is not None:
self.progressTracker = progressTracker
wav = self.data.wave
assert isinstance(wav, Wave)
x = wav.value
self.progressTracker.update(10)
y = signal.lfilter(self.parameters["B"], self.parameters["A"],
x).astype(x.dtype)
self.progressTracker.update(90)
new_track = (Wave(
y,
fs=wav.fs,
path=str(
wav.path.with_name(wav.path.stem + "-filtered").with_suffix(
Wave.default_suffix)),
), )
return new_track
def read_xdf(cls, path):
raise NotImplementedError
import openxdf
# TODO: below is a place holder and needs to be finalize
xdf = openxdf.OpenXDF(path)
signals = openxdf.Signal(xdf, path.with_suffix(".nkamp"))
# TODO: automate this, why are the xdf.header names different from signals.list_channels?
for label in ["ECG", "Chin"]:
# logger.info(f'reading {label} channel')
sig = signals.read_file(label)[label]
wav = Wave(sig.ravel(), 200)
wav.label = label
# wav.path = file.with_name(file.stem + '-' + label + '.wav')
wav.min = -3200
wav.max = 3200
wav.unit = "1"
def var():
w = Wave(value=np.arange(0, 16000), fs=16000)
v = Wave(value=np.arange(100, 200), fs=16000)
assert isinstance(w, Track)
assert isinstance(v, Track)
return w, v
def test_resample(benchmark):
w1 = Wave(value=np.arange(0, 50), fs=1)
w2 = benchmark(w1.resample, 2)
assert w1.value[0][0] == int(w2.value[0][0])
def test_select(var, benchmark):
w, _ = var
w = benchmark(w.select, 10, 20)
assert w == Wave(np.arange(10, 20, dtype=np.int64), 16000)