neuralynxio.py 文件源码

def __mmap_nev_file(self, filename):
        """ Memory map the Neuralynx .nev file """
        nev_dtype = np.dtype([
            ('reserved', '<i2'),
            ('system_id', '<i2'),
            ('data_size', '<i2'),
            ('timestamp', '<u8'),
            ('event_id', '<i2'),
            ('ttl_input', '<i2'),
            ('crc_check', '<i2'),
            ('dummy1', '<i2'),
            ('dummy2', '<i2'),
            ('extra', '<i4', (8,)),
            ('event_string', 'a128'),
        ])

        if getsize(self.sessiondir + sep + filename) > 16384:
            return np.memmap(self.sessiondir + sep + filename,
                             dtype=nev_dtype, mode='r', offset=16384)
        else:
            return None