ref: 1b6a62deb6137e96437f0eb9924aac93006719b3
dir: /python/tests/test_filterbank.py/
#! /usr/bin/env python
from numpy.testing import TestCase, run_module_suite
from numpy.testing import assert_equal, assert_almost_equal
from numpy import random
from math import pi
from numpy import array
from aubio import cvec, filterbank
from utils import array_from_text_file
class aubio_filterbank_test_case(TestCase):
def test_members(self):
f = filterbank(40, 512)
assert_equal ([f.n_filters, f.win_s], [40, 512])
def test_set_coeffs(self):
f = filterbank(40, 512)
r = random.random([40, 512 / 2 + 1]).astype('float32')
f.set_coeffs(r)
assert_equal (r, f.get_coeffs())
def test_phase(self):
f = filterbank(40, 512)
c = cvec(512)
c.phas[:] = pi
assert_equal( f(c), 0);
def test_norm(self):
f = filterbank(40, 512)
c = cvec(512)
c.norm[:] = 1
assert_equal( f(c), 0);
def test_random_norm(self):
f = filterbank(40, 512)
c = cvec(512)
c.norm[:] = random.random((512 / 2 + 1,)).astype('float32')
assert_equal( f(c), 0)
def test_random_coeffs(self):
f = filterbank(40, 512)
c = cvec(512)
r = random.random([40, 512 / 2 + 1]).astype('float32')
r /= r.sum()
f.set_coeffs(r)
c.norm[:] = random.random((512 / 2 + 1,)).astype('float32')
assert_equal ( f(c) < 1., True )
assert_equal ( f(c) > 0., True )
def test_mfcc_coeffs(self):
f = filterbank(40, 512)
c = cvec(512)
f.set_mel_coeffs_slaney(44100)
c.norm[:] = random.random((512 / 2 + 1,)).astype('float32')
assert_equal ( f(c) < 1., True )
assert_equal ( f(c) > 0., True )
def test_mfcc_coeffs_16000(self):
expected = array_from_text_file('filterbank_mfcc_16000_512.expected')
f = filterbank(40, 512)
f.set_mel_coeffs_slaney(16000)
assert_almost_equal ( expected, f.get_coeffs() )
if __name__ == '__main__':
from unittest import main
main()