portaudio.py 文件源码

def readinto(self, buf):
        with self.lock:
            assert(len(buf) % self.frame_nbyte == 0)
            nframe = len(buf) // self.frame_nbyte
            # Note: This allows buf to be a buffer/memoryview object
            #         E.g., numpy.ndarray.data
            buf_view = (ctypes.c_byte * len(buf)).from_buffer(buf)
            # TODO: This returns PaInputOverflowed if input data were dropped
            #         by PortAudio since the last call (equivalent to dropping
            #         packets).
            _check(_lib.Pa_ReadStream(self.stream, buf_view, nframe))
            return buf