ref: 779966bd7d91e0ff09e26d8d2f8524791e72e5b4
dir: /interfaces/python/test_filter.py/
#! /usr/bin/python
from numpy.testing import TestCase, assert_equal, assert_almost_equal
from aubio import fvec, digital_filter
from numpy import array
def array_from_text_file(filename, dtype = 'float'):
return array([line.split() for line in open(filename).readlines()],
dtype = dtype)
class aubio_filter_test_case(TestCase):
def test_members(self):
f = digital_filter()
assert_equal (f.order, 7)
f = digital_filter(5)
assert_equal (f.order, 5)
f(fvec())
def test_cweighting_error(self):
f = digital_filter (2)
self.assertRaises ( ValueError, f.set_c_weighting, 44100 )
f = digital_filter (8)
self.assertRaises ( ValueError, f.set_c_weighting, 44100 )
f = digital_filter (5)
self.assertRaises ( ValueError, f.set_c_weighting, 4000 )
f = digital_filter (5)
self.assertRaises ( ValueError, f.set_c_weighting, 193000 )
f = digital_filter (7)
self.assertRaises ( ValueError, f.set_a_weighting, 193000 )
f = digital_filter (5)
self.assertRaises ( ValueError, f.set_a_weighting, 192000 )
def test_c_weighting(self):
expected = array_from_text_file('c_weighting_test_simple.expected')
f = digital_filter(5)
f.set_c_weighting(44100)
v = fvec(32)
v[12] = .5
u = f(v)
assert_almost_equal (expected[1], u)
def test_a_weighting(self):
expected = array_from_text_file('a_weighting_test_simple.expected')
f = digital_filter(7)
f.set_a_weighting(44100)
v = fvec(32)
v[12] = .5
u = f(v)
assert_almost_equal (expected[1], u)
def test_a_weighting_parted(self):
expected = array_from_text_file('a_weighting_test_simple.expected')
f = digital_filter(7)
f.set_a_weighting(44100)
v = fvec(16)
v[12] = .5
u = f(v)
assert_almost_equal (expected[1][:16], u)
# one more time
v = fvec(16)
u = f(v)
assert_almost_equal (expected[1][16:], u)
if __name__ == '__main__':
from unittest import main
main()