Module note_seq.audio_io_test
Tests for audio_io.py.
Expand source code
# Copyright 2021 The Magenta Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Tests for audio_io.py."""
import io
import os
import wave
from absl.testing import absltest
from note_seq import audio_io
from note_seq import testing_lib
import numpy as np
import scipy
class AudioIoTest(absltest.TestCase):
def setUp(self):
super().setUp()
self.wav_filename = os.path.join(
testing_lib.get_testdata_dir(), 'example.wav')
self.wav_filename_mono = os.path.join(
testing_lib.get_testdata_dir(), 'example_mono.wav')
self.wav_data = open(self.wav_filename, 'rb').read()
self.wav_data_mono = open(self.wav_filename_mono, 'rb').read()
def testWavDataToSamples(self):
w = wave.open(self.wav_filename, 'rb')
w_mono = wave.open(self.wav_filename_mono, 'rb')
# Check content size.
y = audio_io.wav_data_to_samples(self.wav_data, sample_rate=16000)
y_mono = audio_io.wav_data_to_samples(self.wav_data_mono, sample_rate=22050)
self.assertEqual(
round(16000.0 * w.getnframes() / w.getframerate()), y.shape[0])
self.assertEqual(
round(22050.0 * w_mono.getnframes() / w_mono.getframerate()),
y_mono.shape[0])
# Check a few obvious failure modes.
self.assertLess(0.01, y.std())
self.assertLess(0.01, y_mono.std())
self.assertGreater(-0.1, y.min())
self.assertGreater(-0.1, y_mono.min())
self.assertLess(0.1, y.max())
self.assertLess(0.1, y_mono.max())
def testFloatWavDataToSamples(self):
y = audio_io.wav_data_to_samples(self.wav_data, sample_rate=16000)
wav_io = io.BytesIO()
scipy.io.wavfile.write(wav_io, 16000, y)
y_from_float = audio_io.wav_data_to_samples(
wav_io.getvalue(), sample_rate=16000)
np.testing.assert_array_equal(y, y_from_float)
def testWavDataToSamplesPydub(self):
w = wave.open(self.wav_filename, 'rb')
w_mono = wave.open(self.wav_filename_mono, 'rb')
# Check content size.
y = audio_io.wav_data_to_samples_pydub(
self.wav_data, sample_rate=16000, num_channels=1)
y_mono = audio_io.wav_data_to_samples_pydub(
self.wav_data_mono, sample_rate=22050, num_channels=1)
self.assertEqual(
round(16000.0 * w.getnframes() / w.getframerate()), y.shape[0])
self.assertEqual(
round(22050.0 * w_mono.getnframes() / w_mono.getframerate()),
y_mono.shape[0])
# Check a few obvious failure modes.
self.assertLess(0.01, y.std())
self.assertLess(0.01, y_mono.std())
self.assertGreater(-0.1, y.min())
self.assertGreater(-0.1, y_mono.min())
self.assertLess(0.1, y.max())
self.assertLess(0.1, y_mono.max())
def testRepeatSamplesToDuration(self):
samples = np.arange(5)
repeated = audio_io.repeat_samples_to_duration(
samples, sample_rate=5, duration=1.8)
expected_samples = [0, 1, 2, 3, 4, 0, 1, 2, 3]
np.testing.assert_array_equal(expected_samples, repeated)
if __name__ == '__main__':
absltest.main()
Classes
class AudioIoTest (*args, **kwargs)
-
Extension of unittest.TestCase providing more power.
Create an instance of the class that will use the named test method when executed. Raises a ValueError if the instance does not have a method with the specified name.
Expand source code
class AudioIoTest(absltest.TestCase): def setUp(self): super().setUp() self.wav_filename = os.path.join( testing_lib.get_testdata_dir(), 'example.wav') self.wav_filename_mono = os.path.join( testing_lib.get_testdata_dir(), 'example_mono.wav') self.wav_data = open(self.wav_filename, 'rb').read() self.wav_data_mono = open(self.wav_filename_mono, 'rb').read() def testWavDataToSamples(self): w = wave.open(self.wav_filename, 'rb') w_mono = wave.open(self.wav_filename_mono, 'rb') # Check content size. y = audio_io.wav_data_to_samples(self.wav_data, sample_rate=16000) y_mono = audio_io.wav_data_to_samples(self.wav_data_mono, sample_rate=22050) self.assertEqual( round(16000.0 * w.getnframes() / w.getframerate()), y.shape[0]) self.assertEqual( round(22050.0 * w_mono.getnframes() / w_mono.getframerate()), y_mono.shape[0]) # Check a few obvious failure modes. self.assertLess(0.01, y.std()) self.assertLess(0.01, y_mono.std()) self.assertGreater(-0.1, y.min()) self.assertGreater(-0.1, y_mono.min()) self.assertLess(0.1, y.max()) self.assertLess(0.1, y_mono.max()) def testFloatWavDataToSamples(self): y = audio_io.wav_data_to_samples(self.wav_data, sample_rate=16000) wav_io = io.BytesIO() scipy.io.wavfile.write(wav_io, 16000, y) y_from_float = audio_io.wav_data_to_samples( wav_io.getvalue(), sample_rate=16000) np.testing.assert_array_equal(y, y_from_float) def testWavDataToSamplesPydub(self): w = wave.open(self.wav_filename, 'rb') w_mono = wave.open(self.wav_filename_mono, 'rb') # Check content size. y = audio_io.wav_data_to_samples_pydub( self.wav_data, sample_rate=16000, num_channels=1) y_mono = audio_io.wav_data_to_samples_pydub( self.wav_data_mono, sample_rate=22050, num_channels=1) self.assertEqual( round(16000.0 * w.getnframes() / w.getframerate()), y.shape[0]) self.assertEqual( round(22050.0 * w_mono.getnframes() / w_mono.getframerate()), y_mono.shape[0]) # Check a few obvious failure modes. self.assertLess(0.01, y.std()) self.assertLess(0.01, y_mono.std()) self.assertGreater(-0.1, y.min()) self.assertGreater(-0.1, y_mono.min()) self.assertLess(0.1, y.max()) self.assertLess(0.1, y_mono.max()) def testRepeatSamplesToDuration(self): samples = np.arange(5) repeated = audio_io.repeat_samples_to_duration( samples, sample_rate=5, duration=1.8) expected_samples = [0, 1, 2, 3, 4, 0, 1, 2, 3] np.testing.assert_array_equal(expected_samples, repeated)
Ancestors
- absl.testing.absltest.TestCase
- absl.third_party.unittest3_backport.case.TestCase
- unittest.case.TestCase
Methods
def setUp(self)
-
Hook method for setting up the test fixture before exercising it.
Expand source code
def setUp(self): super().setUp() self.wav_filename = os.path.join( testing_lib.get_testdata_dir(), 'example.wav') self.wav_filename_mono = os.path.join( testing_lib.get_testdata_dir(), 'example_mono.wav') self.wav_data = open(self.wav_filename, 'rb').read() self.wav_data_mono = open(self.wav_filename_mono, 'rb').read()
def testFloatWavDataToSamples(self)
-
Expand source code
def testFloatWavDataToSamples(self): y = audio_io.wav_data_to_samples(self.wav_data, sample_rate=16000) wav_io = io.BytesIO() scipy.io.wavfile.write(wav_io, 16000, y) y_from_float = audio_io.wav_data_to_samples( wav_io.getvalue(), sample_rate=16000) np.testing.assert_array_equal(y, y_from_float)
def testRepeatSamplesToDuration(self)
-
Expand source code
def testRepeatSamplesToDuration(self): samples = np.arange(5) repeated = audio_io.repeat_samples_to_duration( samples, sample_rate=5, duration=1.8) expected_samples = [0, 1, 2, 3, 4, 0, 1, 2, 3] np.testing.assert_array_equal(expected_samples, repeated)
def testWavDataToSamples(self)
-
Expand source code
def testWavDataToSamples(self): w = wave.open(self.wav_filename, 'rb') w_mono = wave.open(self.wav_filename_mono, 'rb') # Check content size. y = audio_io.wav_data_to_samples(self.wav_data, sample_rate=16000) y_mono = audio_io.wav_data_to_samples(self.wav_data_mono, sample_rate=22050) self.assertEqual( round(16000.0 * w.getnframes() / w.getframerate()), y.shape[0]) self.assertEqual( round(22050.0 * w_mono.getnframes() / w_mono.getframerate()), y_mono.shape[0]) # Check a few obvious failure modes. self.assertLess(0.01, y.std()) self.assertLess(0.01, y_mono.std()) self.assertGreater(-0.1, y.min()) self.assertGreater(-0.1, y_mono.min()) self.assertLess(0.1, y.max()) self.assertLess(0.1, y_mono.max())
def testWavDataToSamplesPydub(self)
-
Expand source code
def testWavDataToSamplesPydub(self): w = wave.open(self.wav_filename, 'rb') w_mono = wave.open(self.wav_filename_mono, 'rb') # Check content size. y = audio_io.wav_data_to_samples_pydub( self.wav_data, sample_rate=16000, num_channels=1) y_mono = audio_io.wav_data_to_samples_pydub( self.wav_data_mono, sample_rate=22050, num_channels=1) self.assertEqual( round(16000.0 * w.getnframes() / w.getframerate()), y.shape[0]) self.assertEqual( round(22050.0 * w_mono.getnframes() / w_mono.getframerate()), y_mono.shape[0]) # Check a few obvious failure modes. self.assertLess(0.01, y.std()) self.assertLess(0.01, y_mono.std()) self.assertGreater(-0.1, y.min()) self.assertGreater(-0.1, y_mono.min()) self.assertLess(0.1, y.max()) self.assertLess(0.1, y_mono.max())