def test_audioclip_stereo_max_volume(nchannels, channel_muted):
def make_frame(t):
frame = []
# build channels (one of each pair muted)
for i in range(int(nchannels / 2)):
if channel_muted == "left":
# if muted channel is left, [0, sound, 0, sound...]
frame.append(np.sin(t * 0))
frame.append(np.sin(440 * 2 * np.pi * t))
else:
# if muted channel is right, [sound, 0, sound, 0...]
frame.append(np.sin(440 * 2 * np.pi * t))
frame.append(np.sin(t * 0))
return np.array(frame).T
clip = AudioClip(make_frame, fps=44100, duration=1)
max_volume = clip.max_volume(stereo=True)
# if `stereo == True`, `AudioClip.max_volume` returns a Numpy array`
assert isinstance(max_volume, np.ndarray)
assert len(max_volume) == nchannels
# check channels muted and with sound
for i, channel_max_volume in enumerate(max_volume):
if i % 2 == 0:
if channel_muted == "left":
assert channel_max_volume == 0
else:
assert channel_max_volume > 0
else:
if channel_muted == "right":
assert channel_max_volume == 0
else:
assert channel_max_volume > 0
def test_audioclip_mono_max_volume():
# mono
make_frame_440 = lambda t: np.sin(440 * 2 * np.pi * t)
clip = AudioClip(make_frame_440, duration=1, fps=44100)
max_volume = clip.max_volume()
assert isinstance(max_volume, float)
assert max_volume > 0
def test_audioclip_mono_max_volume(mono_wave):
clip = AudioClip(mono_wave(440), duration=1, fps=44100)
max_volume = clip.max_volume()
assert isinstance(max_volume, float)
assert max_volume > 0