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#! /usr/bin/env python
from numpy.testing import TestCase, assert_equal, assert_almost_equal
from aubio import fvec, digital_filter
from utils import array_from_text_file
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_c_weighting_8000(self):
expected = array_from_text_file('c_weighting_test_simple_8000.expected')
f = digital_filter(5)
f.set_c_weighting(8000)
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)
def test_set_biquad(self):
f = digital_filter(3)
f.set_biquad(0., 0., 0, 0., 0.)
def test_set_biquad_wrong_order(self):
f = digital_filter(4)
with self.assertRaises(ValueError):
f.set_biquad(0., 0., 0, 0., 0.)
def test_all_available_presets(self):
f = digital_filter(7)
for sr in [8000, 11025, 16000, 22050, 24000, 32000,
44100, 48000, 88200, 96000, 192000]:
f.set_a_weighting(sr)
f = digital_filter(5)
for sr in [8000, 11025, 16000, 22050, 24000, 32000,
44100, 48000, 88200, 96000, 192000]:
f.set_c_weighting(sr)
class aubio_filter_wrong_params(TestCase):
def test_negative_order(self):
with self.assertRaises(ValueError):
digital_filter(-1)
if __name__ == '__main__':
from unittest import main
main()
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