openephys.py 文件源码

def _read_from_header(self):

        folder_path     = os.path.dirname(os.path.realpath(self.file_name))
        self.all_channels = self._get_sorted_channels_()
        self.all_files  = [os.path.join(folder_path, x) for x in self.all_channels]
        self.header     = self._read_header_(self.all_files[0])

        header                  = {}
        header['sampling_rate'] = float(self.header['sampleRate'])        
        header['nb_channels']   = len(self.all_files)
        header['gain']          = float(self.header['bitVolts'])        

        g = open(self.all_files[0], 'rb')
        self.size        = ((os.fstat(g.fileno()).st_size - self.NUM_HEADER_BYTES)//self.RECORD_SIZE - 1) * self.SAMPLES_PER_RECORD
        self._shape      = (self.size, header['nb_channels'])
        g.close()

        return header