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