def num_samples(self, sr=None):
"""
Return the number of samples.
Args:
sr (int): Calculate the number of samples with the given
sampling-rate. If None use the native sampling-rate.
Returns:
int: Number of samples
"""
native_sr = self.sampling_rate
num_samples = units.seconds_to_sample(self.duration, native_sr)
if sr is not None:
ratio = float(sr) / native_sr
num_samples = int(np.ceil(num_samples * ratio))
return num_samples
def test_seconds_to_sample(self):
assert units.seconds_to_sample(0, 16000) == 0
assert units.seconds_to_sample(4.5, 22050) == 99225