Drop-in replacement for ossaudiodev that writes its output to a .wav file.

osswave.py

#!/usr/bin/python

import wave

FILENAME = 'tmp.wav'

AFMT_S16_NE = 16
AFMT_S16_LE = 16
AFMT_U8 = 8

class osswave():
    '''
    Drop-in replacement for ossaudiodev that writes its output to a .wav file.
    '''
    @classmethod
    def open(cls, mode, filename=FILENAME):
        # only 'w' supported for mode thus far.
        return cls(wave.open(filename, mode))

    def __init__(self, wave):
        self.wave = wave
        self.write = self.wave.writeframesraw

    def setparameters(self, fmt, chn, rate, dummy):
        self.wave.setsampwidth(int(fmt / 8)) # bytes per sample
        self.wave.setnchannels(chn)
        self.wave.setframerate(rate)

    def close(self):
        # ''.encode() will produce an empty bytes object in 3.x
        # and a blank string in 2.x
        self.wave.writeframes(''.encode())
        self.wave.close()

open = osswave.open