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105 lines
3 KiB
Python
105 lines
3 KiB
Python
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# This file implements a class which forms an interface to the .cddb
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# directory that is maintained by SGI's cdman program.
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#
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# Usage is as follows:
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#
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# import readcd
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# r = readcd.Readcd().init()
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# c = Cddb().init(r.gettrackinfo())
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#
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# Now you can use c.artist, c.title and c.track[trackno] (where trackno
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# starts at 1). When the CD is not recognized, all values will be the empty
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# string.
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# It is also possible to set the above mentioned variables to new values.
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# You can then use c.write() to write out the changed values to the
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# .cdplayerrc file.
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import string
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_cddbrc = '.cddb/'
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_DB_ID_NTRACKS = 5
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_dbid_map = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ@_=+abcdefghijklmnopqrstuvwxyz'
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def _dbid(v):
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if v >= len(_dbid_map):
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return string.zfill(v, 2)
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else:
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return _dbid_map[v]
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class Cddb():
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def init(self, tracklist):
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self.artist = ''
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self.title = ''
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if type(tracklist) == type(''):
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t = []
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for i in range(2, len(tracklist), 4):
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t.append((None, \
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(string.atoi(tracklist[i:i+2]), \
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string.atoi(tracklist[i+2:i+4]))))
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tracklist = t
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ntracks = len(tracklist)
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self.track = [None] + [''] * ntracks
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self.id = _dbid((ntracks >> 4) & 0xF) + _dbid(ntracks & 0xF)
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if ntracks <= _DB_ID_NTRACKS:
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nidtracks = ntracks
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else:
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nidtracks = _DB_ID_NTRACKS - 1
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min = 0
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sec = 0
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for track in tracklist:
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start, length = track
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min = min + length[0]
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sec = sec + length[1]
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min = min + sec / 60
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sec = sec % 60
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self.id = self.id + _dbid(min) + _dbid(sec)
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for i in range(nidtracks):
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start, length = tracklist[i]
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self.id = self.id + _dbid(length[0]) + _dbid(length[1])
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self.toc = string.zfill(ntracks, 2)
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for track in tracklist:
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start, length = track
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self.toc = self.toc + string.zfill(length[0], 2) + \
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string.zfill(length[1], 2)
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try:
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import posix
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file = posix.environ['HOME'] + '/' + _cddbrc + self.id + '.rdb'
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f = open(file, 'r')
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except IOError:
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return self
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import regex
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reg = regex.compile('^\\([^.]*\\)\\.\\([^:]*\\):\t\\(.*\\)')
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while 1:
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line = f.readline()
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if not line:
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break
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if reg.match(line) == -1:
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print 'syntax error in ' + file
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continue
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name1 = line[reg.regs[1][0]:reg.regs[1][1]]
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name2 = line[reg.regs[2][0]:reg.regs[2][1]]
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value = line[reg.regs[3][0]:reg.regs[3][1]]
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if name1 == 'album':
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if name2 == 'artist':
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self.artist = value
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elif name2 == 'title':
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self.title = value
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elif name2 == 'toc':
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if self.toc != value:
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print 'toc\'s don\'t match'
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elif name1[:5] == 'track':
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trackno = string.atoi(name1[5:])
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self.track[trackno] = value
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f.close()
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return self
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def write(self):
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import posix
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file = posix.environ['HOME'] + '/' + _cddbrc + self.id + '.rdb'
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f = open(file, 'w')
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f.write('album.title:\t' + self.title + '\n')
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f.write('album.artist:\t' + self.artist + '\n')
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f.write('album.toc:\t' + self.toc + '\n')
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for i in range(1, len(self.track)):
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f.write('track' + `i` + '.title:\t' + self.track[i] + '\n')
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f.close()
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