source: python/vendor/Python-2.6.5/Lib/plat-irix5/cddb.py

Last change on this file was 2, checked in by Yuri Dario, 15 years ago

Initial import for vendor code.
  • Property svn:eol-style set to native
File size: 7.1 KB
Line 
1# This file implements a class which forms an interface to the .cddb
2# directory that is maintained by SGI's cdman program.
3#
4# Usage is as follows:
5#
6# import readcd
7# r = readcd.Readcd()
8# c = Cddb(r.gettrackinfo())
9#
10# Now you can use c.artist, c.title and c.track[trackno] (where trackno
11# starts at 1). When the CD is not recognized, all values will be the empty
12# string.
13# It is also possible to set the above mentioned variables to new values.
14# You can then use c.write() to write out the changed values to the
15# .cdplayerrc file.
16from warnings import warnpy3k
17warnpy3k("the cddb module has been removed in Python 3.0", stacklevel=2)
18del warnpy3k
19
20import string, posix, os
21
22_cddbrc = '.cddb'
23_DB_ID_NTRACKS = 5
24_dbid_map = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ@_=+abcdefghijklmnopqrstuvwxyz'
25def _dbid(v):
26 if v >= len(_dbid_map):
27 return string.zfill(v, 2)
28 else:
29 return _dbid_map[v]
30
31def tochash(toc):
32 if type(toc) == type(''):
33 tracklist = []
34 for i in range(2, len(toc), 4):
35 tracklist.append((None,
36 (int(toc[i:i+2]),
37 int(toc[i+2:i+4]))))
38 else:
39 tracklist = toc
40 ntracks = len(tracklist)
41 hash = _dbid((ntracks >> 4) & 0xF) + _dbid(ntracks & 0xF)
42 if ntracks <= _DB_ID_NTRACKS:
43 nidtracks = ntracks
44 else:
45 nidtracks = _DB_ID_NTRACKS - 1
46 min = 0
47 sec = 0
48 for track in tracklist:
49 start, length = track
50 min = min + length[0]
51 sec = sec + length[1]
52 min = min + sec / 60
53 sec = sec % 60
54 hash = hash + _dbid(min) + _dbid(sec)
55 for i in range(nidtracks):
56 start, length = tracklist[i]
57 hash = hash + _dbid(length[0]) + _dbid(length[1])
58 return hash
59
60class Cddb:
61 def __init__(self, tracklist):
62 if os.environ.has_key('CDDB_PATH'):
63 path = os.environ['CDDB_PATH']
64 cddb_path = path.split(',')
65 else:
66 home = os.environ['HOME']
67 cddb_path = [home + '/' + _cddbrc]
68
69 self._get_id(tracklist)
70
71 for dir in cddb_path:
72 file = dir + '/' + self.id + '.rdb'
73 try:
74 f = open(file, 'r')
75 self.file = file
76 break
77 except IOError:
78 pass
79 ntracks = int(self.id[:2], 16)
80 self.artist = ''
81 self.title = ''
82 self.track = [None] + [''] * ntracks
83 self.trackartist = [None] + [''] * ntracks
84 self.notes = []
85 if not hasattr(self, 'file'):
86 return
87 import re
88 reg = re.compile(r'^([^.]*)\.([^:]*):[\t ]+(.*)')
89 while 1:
90 line = f.readline()
91 if not line:
92 break
93 match = reg.match(line)
94 if not match:
95 print 'syntax error in ' + file
96 continue
97 name1, name2, value = match.group(1, 2, 3)
98 if name1 == 'album':
99 if name2 == 'artist':
100 self.artist = value
101 elif name2 == 'title':
102 self.title = value
103 elif name2 == 'toc':
104 if not self.toc:
105 self.toc = value
106 if self.toc != value:
107 print 'toc\'s don\'t match'
108 elif name2 == 'notes':
109 self.notes.append(value)
110 elif name1[:5] == 'track':
111 try:
112 trackno = int(name1[5:])
113 except strings.atoi_error:
114 print 'syntax error in ' + file
115 continue
116 if trackno > ntracks:
117 print 'track number %r in file %r out of range' % (trackno, file)
118 continue
119 if name2 == 'title':
120 self.track[trackno] = value
121 elif name2 == 'artist':
122 self.trackartist[trackno] = value
123 f.close()
124 for i in range(2, len(self.track)):
125 track = self.track[i]
126 # if track title starts with `,', use initial part
127 # of previous track's title
128 if track and track[0] == ',':
129 try:
130 off = self.track[i - 1].index(',')
131 except ValueError:
132 pass
133 else:
134 self.track[i] = self.track[i-1][:off] \
135 + track
136
137 def _get_id(self, tracklist):
138 # fill in self.id and self.toc.
139 # if the argument is a string ending in .rdb, the part
140 # upto the suffix is taken as the id.
141 if type(tracklist) == type(''):
142 if tracklist[-4:] == '.rdb':
143 self.id = tracklist[:-4]
144 self.toc = ''
145 return
146 t = []
147 for i in range(2, len(tracklist), 4):
148 t.append((None, \
149 (int(tracklist[i:i+2]), \
150 int(tracklist[i+2:i+4]))))
151 tracklist = t
152 ntracks = len(tracklist)
153 self.id = _dbid((ntracks >> 4) & 0xF) + _dbid(ntracks & 0xF)
154 if ntracks <= _DB_ID_NTRACKS:
155 nidtracks = ntracks
156 else:
157 nidtracks = _DB_ID_NTRACKS - 1
158 min = 0
159 sec = 0
160 for track in tracklist:
161 start, length = track
162 min = min + length[0]
163 sec = sec + length[1]
164 min = min + sec / 60
165 sec = sec % 60
166 self.id = self.id + _dbid(min) + _dbid(sec)
167 for i in range(nidtracks):
168 start, length = tracklist[i]
169 self.id = self.id + _dbid(length[0]) + _dbid(length[1])
170 self.toc = string.zfill(ntracks, 2)
171 for track in tracklist:
172 start, length = track
173 self.toc = self.toc + string.zfill(length[0], 2) + \
174 string.zfill(length[1], 2)
175
176 def write(self):
177 import posixpath
178 if os.environ.has_key('CDDB_WRITE_DIR'):
179 dir = os.environ['CDDB_WRITE_DIR']
180 else:
181 dir = os.environ['HOME'] + '/' + _cddbrc
182 file = dir + '/' + self.id + '.rdb'
183 if posixpath.exists(file):
184 # make backup copy
185 posix.rename(file, file + '~')
186 f = open(file, 'w')
187 f.write('album.title:\t' + self.title + '\n')
188 f.write('album.artist:\t' + self.artist + '\n')
189 f.write('album.toc:\t' + self.toc + '\n')
190 for note in self.notes:
191 f.write('album.notes:\t' + note + '\n')
192 prevpref = None
193 for i in range(1, len(self.track)):
194 if self.trackartist[i]:
195 f.write('track%r.artist:\t%s\n' % (i, self.trackartist[i]))
196 track = self.track[i]
197 try:
198 off = track.index(',')
199 except ValuError:
200 prevpref = None
201 else:
202 if prevpref and track[:off] == prevpref:
203 track = track[off:]
204 else:
205 prevpref = track[:off]
206 f.write('track%r.title:\t%s\n' % (i, track))
207 f.close()
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