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26 lines
654 B
Python
26 lines
654 B
Python
from amodem import sampling
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from amodem import common
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import numpy as np
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from io import BytesIO
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def test_resample():
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x = np.sin(2*np.pi * 10 * np.linspace(0, 1, 1001))
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src = BytesIO(common.dumps(x))
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dst = BytesIO()
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sampling.resample(src=src, dst=dst, df=0.0)
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y = common.loads(dst.getvalue())
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err = x[1:len(y)+1] - y
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assert np.max(np.abs(err)) < 1e-4
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dst = BytesIO()
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sampling.resample(src=BytesIO('\x00\x00'), dst=dst, df=0.0)
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assert dst.tell() == 0
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def test_coeffs():
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I = sampling.Interpolator(width=4, resolution=16)
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err = I.filt[0] - [0, 0, 0, 1, 0, 0, 0, 0]
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assert np.max(np.abs(err)) < 1e-10
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