cddb.py 文件源码

def _get_id(self, tracklist):
        # fill in self.id and self.toc.
        # if the argument is a string ending in .rdb, the part
        # upto the suffix is taken as the id.
        if type(tracklist) == type(''):
            if tracklist[-4:] == '.rdb':
                self.id = tracklist[:-4]
                self.toc = ''
                return
            t = []
            for i in range(2, len(tracklist), 4):
                t.append((None, \
                          (int(tracklist[i:i+2]), \
                           int(tracklist[i+2:i+4]))))
            tracklist = t
        ntracks = len(tracklist)
        self.id = _dbid((ntracks >> 4) & 0xF) + _dbid(ntracks & 0xF)
        if ntracks <= _DB_ID_NTRACKS:
            nidtracks = ntracks
        else:
            nidtracks = _DB_ID_NTRACKS - 1
            min = 0
            sec = 0
            for track in tracklist:
                start, length = track
                min = min + length[0]
                sec = sec + length[1]
            min = min + sec / 60
            sec = sec % 60
            self.id = self.id + _dbid(min) + _dbid(sec)
        for i in range(nidtracks):
            start, length = tracklist[i]
            self.id = self.id + _dbid(length[0]) + _dbid(length[1])
        self.toc = string.zfill(ntracks, 2)
        for track in tracklist:
            start, length = track
            self.toc = self.toc + string.zfill(length[0], 2) + \
                      string.zfill(length[1], 2)