amine@106: import os
amine@106: import sys
amine@106: import math
amine@106: 
amine@106: 
amine@106: if sys.version_info >= (3, 0):
amine@106:     PYTHON_3 = True
amine@106: else:
amine@106:     PYTHON_3 = False
amine@106: 
amine@106: 
amine@106: def _sample_generator(*data_buffers):
amine@106:     """
amine@106:     Takes a list of many mono audio data buffers and makes a sample generator
amine@106:     of interleaved audio samples, one sample from each channel. The resulting
amine@106:     generator can be used to build a multichannel audio buffer.
amine@106:     >>> gen = _sample_generator("abcd", "ABCD")
amine@106:     >>> list(gen)
amine@106:     ["a", "A", "b", "B", "c", "C", "d", "D"]
amine@106:     """
amine@106:     frame_gen = zip(*data_buffers)
amine@106:     return (sample for frame in frame_gen for sample in frame)
amine@106: 
amine@106: 
amine@106: def _array_to_bytes(a):
amine@106:     """
amine@106:     Converts an `array.array` to `bytes`.
amine@106:     """
amine@106:     if PYTHON_3:
amine@106:         return a.tobytes()
amine@106:     else:
amine@106:         return a.tostring()