sunau.py 文件源码

def readframes(self, nframes):
        if self._encoding in _simple_encodings:
            if nframes == AUDIO_UNKNOWN_SIZE:
                data = self._file.read()
            else:
                data = self._file.read(nframes * self._framesize * self._nchannels)
            if self._encoding == AUDIO_FILE_ENCODING_MULAW_8:
                import audioop
                data = audioop.ulaw2lin(data, self._sampwidth)
            return data
        return None             # XXX--not implemented yet