def test_join_with_operator(self):
sound = Sound.from_sinwave(440)
a = Resampling(88200)
b = Resampling(44100)
resampled = b << a << sound
self.assertEqual(resampled.samplerate, sound.samplerate)
resampled = sound >> a >> b
self.assertEqual(resampled.samplerate, sound.samplerate)
resampled = sound >> a >> b
self.assertEqual(resampled.samplerate, sound.samplerate)
resampled = (a >> b) << sound
self.assertEqual(resampled.samplerate, sound.samplerate)
resampled = (b << a) << sound
self.assertEqual(resampled.samplerate, sound.samplerate)
resampled = sound >> (a >> b)
self.assertEqual(resampled.samplerate, sound.samplerate)
resampled = sound >> (b << a)
self.assertEqual(resampled.samplerate, sound.samplerate)
resampled = a << sound >> b
self.assertEqual(resampled.samplerate, sound.samplerate)
def test_same_samplerate(self):
sound = Sound.from_sinwave(440, samplerate=44100)
resample_to_same_rate = Resampling(sound.samplerate).apply(sound)
self.assertIs(resample_to_same_rate, sound)
self.assertTrue((resample_to_same_rate.data == sound.data).all())
def test_then_method(self):
sound = Sound.from_sinwave(440)
in_ = LinearFadeIn()
out = LinearFadeOut()
self.assertEqual(
in_.then(out).apply(sound), in_.apply(out.apply(sound)))
def test_join_class(self):
sound = Sound.from_sinwave(440)
in_ = LinearFadeIn()
out = LinearFadeOut()
self.assertEqual(
in_.then(out).apply(sound),
JoinedEffect(in_, out).apply(sound))
def test_not_implemented_mask_effect(self):
sound = Sound.from_sinwave(440)
effect = MaskEffect()
with self.assertRaises(NotImplementedError):
effect.apply(sound)
with self.assertRaises(NotImplementedError):
effect.gen_mask(1)
def test_twice_resampling(self):
sound = Sound.from_sinwave(440, samplerate=44100)
resampled = sound >> Resampling(48000) >> Resampling(sound.samplerate)
self.assertEqual(resampled.samplerate, sound.samplerate)
self.assertIsNot(resampled, sound)
self.assertFalse((resampled.data == sound.data).all())
self.assertTrue(numpy.allclose(resampled.data, sound.data, atol=0.01))
def setUp(self):
self.a = Sound.from_sinwave(100,
duration=0.1,
volume=1 / 3,
samplerate=60000)
self.b = Sound.from_sinwave(200,
duration=0.1,
volume=1 / 3,
samplerate=60000)
self.c = Sound.from_sinwave(300,
duration=0.1,
volume=1 / 3,
samplerate=60000)
self.ab = overlay(self.a, self.b)
self.bc = overlay(self.b, self.c)
self.abc = overlay(self.a, self.b, self.c)
def test_volume_invalid(self):
sound = Sound.from_sinwave(440)
with self.assertRaises(InvalidVolumeError) as cm:
ChangeVolume(-0.1)
self.assertEqual(cm.exception.volume, -0.1)
with self.assertRaises(InvalidVolumeError) as cm:
ChangeVolume(1.1)
self.assertEqual(cm.exception.volume, 1.1)
def test_trim_between_invalid(self):
sound = Sound.from_sinwave(440)
with self.assertRaises(InvalidDurationError) as cm:
Trim(start=0.6, end=0.5)
self.assertAlmostEqual(cm.exception.duration, -0.1)
with self.assertRaises(InvalidDurationError) as cm:
Trim(start=0.5, end=0.5)
self.assertAlmostEqual(cm.exception.duration, 0)
trim = Trim(start=2)
with self.assertRaises(InvalidDurationError) as cm:
trim.apply(sound)
self.assertAlmostEqual(cm.exception.duration, 0)
def test_volume(self):
sound = Sound.from_sinwave(440)
self.assertAlmostEqual(sound.volume, 1, places=4)
sound = ChangeVolume(0.8).apply(sound)
self.assertAlmostEqual(sound.volume, 0.8, places=4)
sound = ChangeVolume(0.3).apply(sound)
self.assertAlmostEqual(sound.volume, 0.3, places=4)
sound = ChangeVolume(1.0).apply(sound)
self.assertAlmostEqual(sound.volume, 1, places=4)
self.assertIs(ChangeVolume(1.0).apply(sound), sound)