| 1 | from sas.sascalc.data_util.calcthread import CalcThread |
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| 2 | from sas.sascalc.dataloader.data_info import Data1D |
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| 3 | from scipy.fftpack import dct |
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| 4 | import numpy as np |
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| 5 | from time import sleep |
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| 6 | |
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| 7 | class FourierThread(CalcThread): |
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| 8 | def __init__(self, raw_data, extrapolated_data, bg, updatefn=None, |
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| 9 | completefn=None): |
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| 10 | CalcThread.__init__(self, updatefn=updatefn, completefn=completefn) |
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| 11 | self.data = raw_data |
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| 12 | self.background = bg |
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| 13 | self.extrapolation = extrapolated_data |
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| 14 | |
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| 15 | def compute(self): |
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| 16 | qs = self.extrapolation.x |
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| 17 | iqs = self.extrapolation.y |
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| 18 | q = self.data.x |
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| 19 | background = self.background |
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| 20 | |
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| 21 | self.ready(delay=0.0) |
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| 22 | self.update(msg="Starting Fourier transform.") |
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| 23 | self.ready(delay=0.0) |
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| 24 | if self.isquit(): |
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| 25 | return |
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| 26 | try: |
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| 27 | gamma = dct((iqs-background)*qs**2) |
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| 28 | gamma = gamma / gamma.max() |
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| 29 | except: |
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| 30 | self.update(msg="Fourier transform failed.") |
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| 31 | self.complete(transform=None) |
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| 32 | return |
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| 33 | if self.isquit(): |
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| 34 | return |
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| 35 | self.update(msg="Fourier transform completed.") |
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| 36 | |
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| 37 | xs = np.pi*np.arange(len(qs),dtype=np.float32)/(q[1]-q[0])/len(qs) |
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| 38 | transform = Data1D(xs, gamma) |
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| 39 | |
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| 40 | self.complete(transform=transform) |
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| 41 | |
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| 42 | class HilbertThread(CalcThread): |
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| 43 | def __init__(self, raw_data, extrapolated_data, bg, updatefn=None, |
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| 44 | completefn=None): |
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| 45 | CalcThread.__init__(self, updatefn=updatefn, completefn=completefn) |
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| 46 | self.data = raw_data |
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| 47 | self.background = bg |
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| 48 | self.extrapolation = extrapolated_data |
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| 49 | |
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| 50 | def compute(self): |
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| 51 | qs = self.extrapolation.x |
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| 52 | iqs = self.extrapolation.y |
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| 53 | q = self.data.x |
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| 54 | background = self.background |
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| 55 | |
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| 56 | self.ready(delay=0.0) |
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| 57 | self.update(msg="Starting Hilbert transform.") |
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| 58 | self.ready(delay=0.0) |
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| 59 | if self.isquit(): |
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| 60 | return |
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| 61 | |
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| 62 | # TODO: Implement hilbert transform |
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| 63 | |
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| 64 | self.update(msg="Hilbert transform completed.") |
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| 65 | |
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| 66 | self.complete(transform=None) |
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