27fdb84b |
1 | #!/usr/bin/python |
2 | |
3 | """Outputs a long-form cddb discid given a cue file as input""" |
4 | |
5 | import fileinput |
6 | import re |
7 | |
8 | FRAMES_PER_SECOND = 75 |
9 | SAMPLES_PER_SECOND = 44100 |
10 | SAMPLES_PER_FRAME = SAMPLES_PER_SECOND // FRAMES_PER_SECOND |
11 | |
12 | pregap = 0 |
13 | currentTrackFrame = 0 |
14 | pregapRegex = re.compile(r'PREGAP (?P<min>\d+):(?P<sec>\d\d):(?P<frame>\d\d)') |
15 | startTrackRegex = re.compile(r'INDEX 01 (?P<min>\d+):(?P<sec>\d\d):(?P<frame>\d\d)') |
16 | leadInRegex = re.compile(r'REM FLAC__lead-in (?P<sample>\d+)') |
17 | leadOutRegex = re.compile(r'REM FLAC__lead-out 170 (?P<sample>\d+)') |
18 | raw_framelist = list() |
19 | |
20 | numTracks = 0 |
21 | |
22 | def cddb_sum(trackseconds): |
23 | def digits(number): |
24 | tmp = number |
25 | while tmp: |
26 | yield tmp % 10 |
27 | tmp = tmp // 10 |
28 | |
29 | return sum(digits(trackseconds)) |
30 | |
31 | for line in fileinput.input(): |
32 | pregapMatch = pregapRegex.search(line) |
33 | if pregapMatch: |
34 | pregap = (int((pregapMatch.group('min')) * 60) + int(pregapMatch.group('sec'))) * FRAMES_PER_SECOND + int(pregapMatch.group('frame')) |
35 | continue |
36 | |
37 | startTrackMatch = startTrackRegex.search(line) |
38 | if startTrackMatch: |
39 | numTracks += 1 |
40 | currentTrackFrame = ((int(startTrackMatch.group('min')) * 60) + int(startTrackMatch.group('sec'))) * FRAMES_PER_SECOND + int(startTrackMatch.group('frame')) |
41 | raw_framelist.append(currentTrackFrame) |
42 | continue |
43 | |
44 | leadInMatch = leadInRegex.search(line) |
45 | if leadInMatch: |
46 | leadInFrame = long(leadInMatch.group('sample')) // SAMPLES_PER_FRAME |
47 | continue |
48 | |
49 | leadOutMatch = leadOutRegex.search(line) |
50 | if leadOutMatch: |
51 | leadOutFrame_raw = long(leadOutMatch.group('sample')) // SAMPLES_PER_FRAME |
52 | continue |
53 | |
54 | leadOutFrame = leadOutFrame_raw + leadInFrame |
55 | |
56 | framelist = [i + leadInFrame + pregap for i in raw_framelist] |
57 | |
58 | secondslist = [i//FRAMES_PER_SECOND for i in framelist] |
59 | |
60 | n = long(sum(map(cddb_sum, secondslist))) |
61 | t = leadOutFrame/FRAMES_PER_SECOND - framelist[0]/FRAMES_PER_SECOND |
62 | print "%08x" % (((n % 0xff) << 24) | (t << 8) | numTracks), numTracks, |
63 | print " ".join([str(i) for i in framelist]), leadOutFrame/FRAMES_PER_SECOND |