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# -*- coding: utf-8 -*-
# ######### COPYRIGHT #########
# Credits
# #######
#
# Copyright(c) 2015-2025
# ----------------------
#
# * `LabEx Archimède <http://labex-archimede.univ-amu.fr/>`_
# * `Laboratoire d'Informatique Fondamentale <http://www.lif.univ-mrs.fr/>`_
# (now `Laboratoire d'Informatique et Systèmes <http://www.lis-lab.fr/>`_)
# * `Institut de Mathématiques de Marseille <http://www.i2m.univ-amu.fr/>`_
# * `Université d'Aix-Marseille <http://www.univ-amu.fr/>`_
#
# This software is a port from LTFAT 2.1.0 :
# Copyright (C) 2005-2025 Peter L. Soendergaard <peter@sonderport.dk>.
#
# Contributors
# ------------
#
# * Denis Arrivault <contact.dev_AT_lis-lab.fr>
# * Florent Jaillet <contact.dev_AT_lis-lab.fr>
#
# Description
# -----------
#
# ltfatpy is a partial Python port of the
# `Large Time/Frequency Analysis Toolbox <http://ltfat.sourceforge.net/>`_,
# a MATLAB®/Octave toolbox for working with time-frequency analysis and
# synthesis.
#
# Version
# -------
#
# * ltfatpy version = 1.1.2
# * LTFAT version = 2.1.0
#
# Licence
# -------
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# ######### COPYRIGHT #########
"""Test of the phaselock function
.. moduleauthor:: Florent Jaillet
"""
from __future__ import print_function, division
import unittest
import numpy as np
from numpy.testing import assert_allclose
from ltfatpy.gabor.phaselock import phaselock
from ltfatpy.gabor.phaseunlock import phaseunlock
from ltfatpy.gabor.dgt import dgt
from ltfatpy.tests.datasets.read_ref_mat import read_ref_mat
from ltfatpy.tests.datasets.get_dataset_path import get_dataset_path
# NOTE: The reference values used in the tests correspond to results
# obtained with Octave using ltfat 2.1.0
class TestPhaselock(unittest.TestCase):
# Called before the tests.
def setUp(self):
print('\nStart TestPhaselock')
# Called after the tests.
def tearDown(self):
print('Test done')
def test_exceptions(self):
"""Check that the right exceptions are raised when expected
"""
c = dgt(np.random.random((16,)), 'gauss', 2, 6)[0]
# a is expected to be an integer, check that we get type error if not
self.assertRaises(TypeError, phaselock, c, 'test')
self.assertRaises(TypeError, phaselock, c, 1.0)
self.assertRaises(TypeError, phaselock, c, (1, 2))
# a should be the value used to generate c with dgt, check that we get
# a value error if not
self.assertRaises(ValueError, phaselock, c, 3)
def test_known(self):
"""Check phaselock on some known results taken from Octave
"""
filename = get_dataset_path('phaselock_ref.mat')
data = read_ref_mat(filename)
for inputs, outputs in data:
out = phaselock(**inputs)
msg = ('Wrong output in phaselock with inputs ' +
str(inputs))
assert_allclose(out, outputs[0], rtol=1e-15, err_msg=msg)
def test_inverse(self):
"""Check that phaselock and phaseunlock are inverse functions
"""
shapes = ((3, 3), (12, 6), (13, 13))
a_val = (1, 4, 7)
inputs = {}
for shape, a in zip(shapes, a_val):
inputs['c'] = np.random.random(shape)
inputs['a'] = a
msg = ('phaselock and phaseunlock should be inverse with inputs ' +
str(inputs))
out = phaseunlock(phaselock(**inputs), inputs['a'])
assert_allclose(inputs['c'], out, rtol=1e-15, err_msg=msg)
out = phaselock(phaseunlock(**inputs), inputs['a'])
assert_allclose(inputs['c'], out, rtol=1e-15, err_msg=msg)
if __name__ == '__main__':
suite = unittest.TestLoader().loadTestsFromTestCase(TestPhaselock)
unittest.TextTestRunner(verbosity=2).run(suite)
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