def test_rmul_soundbuffers(self):
snd = SoundBuffer([1, 2, 3])
snd2 = SoundBuffer([1, 3, 5])
result = SoundBuffer([1, 6, 15])
self.assertEqual(snd2 * snd, result)
self.assertEqual(snd, SoundBuffer([1, 2, 3]))
def test_create_empty_buffer(self):
sound = SoundBuffer()
self.assertTrue(len(sound) == 0)
self.assertTrue(not sound)
sound = SoundBuffer(length=1)
self.assertEqual(len(sound), 44100)
self.assertTrue(sound)
def test_slice_frame(self):
# A SoundBuffer should return a single frame
# when sliced into one-dimensionally like:
#
# frame = sound[frame_index]
#
# A frame is a tuple of floats, one value
# for each channel of sound.
sound = SoundBuffer(filename='tests/sounds/guitar1s.wav')
indices = (0, -1, len(sound) // 2, -(len(sound) // 2))
for frame_index in indices:
frame = sound[frame_index]
self.assertTrue(isinstance(frame, tuple))
self.assertEqual(len(frame), sound.channels)
self.assertTrue(isinstance(frame[0], float))
def test_slice_sample(self):
# Slicing into the second dimension of a SoundBuffer
# will return a single sample at the given channel index.
#
# sample = sound[frame_index][channel_index]
#
# Note: A sample is a float, usually between -1.0 and 1.0
# but pippi will only clip overflow when you ask it to, or
# when writing a SoundBuffer back to a file.
# So, numbers can exceed that range during processing and
# be normalized or clipped as desired later on.
sound = SoundBuffer(filename='tests/sounds/guitar1s.wav')
indices = (0, -1, len(sound) // 2, -(len(sound) // 2))
for frame_index in indices:
for channel_index in range(sound.channels):
sample = sound[frame_index][channel_index]
self.assertTrue(isinstance(sample, float))
def test_div_soundbuffers(self):
snd = SoundBuffer([1, 2, 3])
self.assertEqual(len(snd), 3)
self.assertEqual(snd / 1.5, SoundBuffer([1 / 1.5, 2 / 1.5, 3 / 1.5]))
self.assertEqual(snd, SoundBuffer([1, 2, 3]))
self.assertEqual(snd / 2, SoundBuffer([1 / 2, 2 / 2, 2 / 3]))
self.assertEqual(snd, SoundBuffer([1, 2, 3]))
self.assertEqual(snd / 0, SoundBuffer([0, 0, 0]))
self.assertEqual(snd, SoundBuffer([1, 2, 3]))
self.assertEqual(snd / SoundBuffer([1, 3, 5]),
SoundBuffer([1 / 1, 2 / 3, 3 / 5]))
self.assertEqual(snd, SoundBuffer([1, 2, 3]))
self.assertEqual(
SoundBuffer([1, 3, 5]) / snd, SoundBuffer([1 / 1, 3 / 2, 5 / 3]))
self.assertEqual(snd, SoundBuffer([1, 2, 3]))
snd /= 2
self.assertEqual(snd, SoundBuffer([1 / 2, 2 / 2, 3 / 2]))
def test_sub_soundbuffers(self):
snd = SoundBuffer([1, 2, 3])
self.assertEqual(len(snd), 3)
self.assertEqual(snd - 1.5, SoundBuffer([-0.5, 0.5, 1.5]))
self.assertEqual(snd, SoundBuffer([1, 2, 3]))
self.assertEqual(snd - 2, SoundBuffer([-1, 0, 1]))
self.assertEqual(snd, SoundBuffer([1, 2, 3]))
self.assertEqual(snd - SoundBuffer([1, 3, 5]), SoundBuffer([0, -1,
-2]))
self.assertEqual(snd, SoundBuffer([1, 2, 3]))
self.assertEqual(SoundBuffer([1, 3, 5]) - snd, SoundBuffer([0, 1, 2]))
self.assertEqual(snd, SoundBuffer([1, 2, 3]))
snd -= 2
self.assertEqual(snd, SoundBuffer([-1, 0, 1]))
def test_add_soundbuffers(self):
snd = SoundBuffer([1, 2, 3])
self.assertEqual(len(snd), 3)
self.assertEqual(snd + 2, SoundBuffer([3, 4, 5]))
self.assertEqual(snd, SoundBuffer([1, 2, 3]))
r = snd + SoundBuffer([1, 3, 5])
print(len(r))
for v in r:
print(v)
self.assertEqual(snd + SoundBuffer([1, 3, 5]),
SoundBuffer([1, 2, 3, 1, 3, 5]))
self.assertEqual(snd, SoundBuffer([1, 2, 3]))
self.assertEqual(
SoundBuffer([1, 3, 5]) + snd, SoundBuffer([1, 3, 5, 1, 2, 3]))
self.assertEqual(snd, SoundBuffer([1, 2, 3]))
snd += 2
self.assertEqual(snd, SoundBuffer([3, 4, 5]))
def test_imul_soundbuffer(self):
snd = SoundBuffer([1, 2, 3])
mul = SoundBuffer([2, 2, 2])
result = SoundBuffer([2, 4, 6])
snd *= mul
self.assertEqual(snd, result)
def test_imul_scalar(self):
snd = SoundBuffer([1, 2, 3])
result = SoundBuffer([2, 4, 6])
snd *= 2
self.assertEqual(snd, result)
def test_mul_scalar(self):
snd = SoundBuffer([1, 2, 3])
result = SoundBuffer([2, 4, 6])
self.assertEqual(len(snd), 3)
self.assertEqual(snd * 2, result)
self.assertEqual(snd, SoundBuffer([1, 2, 3]))