diplodocus.org Git - flac-archive/blob - flac2mp3

   1 #!/usr/bin/python
   2
   3 """
   4 =head1 NAME
   5
   6 B<flac2mp3> - transcode FLAC file to MP3 files
   7
   8 =head1 SYNOPSIS
   9
  10 B<flac2mp3> [B<--lame-options> I<lame-options>] [B<-j> I<jobs>] [B<-q>] [B<-v>] I<file> [...]
  11
  12 =head1 DESCRIPTION
  13
  14 B<flac2mp3> transcodes the FLAC files I<file> to MP3 files.  I<file>
  15 may be the kind of FLAC file B<fa-flacd> generates.  That is, it
  16 contains a cue sheet, one TITLE tag per track listed therein, and
  17 ARTIST, ALBUM, and DATE tags.
  18
  19 Note that lame is retarded, and parses B<LANG> directly itself!  So, in order
  20 for it to transcode textual tags, you must specify the encoding in LANG, e.g.
  21 LANG=en_US.utf-8
  22
  23 =head1 OPTIONS
  24
  25 =over 4
  26
  27 =item B<--lame-options> I<lame-options>
  28
  29 Pass I<lame-options> to B<lame>.  This ends up being passed to the
  30 shell, so feel free to take advantage of that.  You'll almost
  31 certainly have to put I<lame-options> in single quotes.
  32
  33 =item B<-j> [B<--jobs>] I<jobs>
  34
  35 Run up to I<jobs> jobs instead of the default 1.
  36
  37 =item B<-q> [B<--quiet>]
  38
  39 Suppress status information.  This option is passed along to B<flac>
  40 and B<lame>.
  41
  42 =item B<-v> [B<--verbose>]
  43
  44 Print diagnostic information.  This option is passed along to B<flac>
  45 and B<lame>.
  46
  47 =back
  48
  49 =head1 AUTHORS
  50
  51 Written by Eric Gillespie <epg@pretzelnet.org>.
  52
  53 =cut
  54
  55 """
  56
  57 import os, re, sys, tempfile, traceback
  58 from optparse import OptionParser
  59 from subprocess import Popen, PIPE
  60
  61 import org.diplodocus.jobs
  62 from org.diplodocus.util import run_or_die
  63
  64 from flac_archive import flac
  65 from flac_archive.tags import Tags
  66
  67 ################################################################################
  68 # The child processes
  69
  70 def flac2mp3(fn, title, artist, album_artist, album, date,
  71              track, skip_until, pics=None):
  72     (title, artist, album) = [(x == None and 'unknown') or x
  73                               for x in (title, artist, album)]
  74     if date == None:
  75         date = ''
  76
  77     if quiet:
  78         flac_options = '--silent'
  79     else:
  80         flac_options = ''
  81
  82     tmp = []
  83     global lame_options
  84     if lame_options != None:
  85         tmp.append(lame_options)
  86     else:
  87         tmp.append('--preset standard');
  88     quiet and tmp.append('--quiet')
  89     verbose and tmp.append('--verbose')
  90     lame_options = ' '.join(tmp)
  91
  92     outfile = ('%s (%s) %02d %s.mp3' % (artist, album,
  93                                         track, title)).replace('/', '_')
  94
  95     # Escape any single quotes ' so we can quote this.
  96     (fn, title, artist, album_artist,
  97      album, date) = [(x or '').replace("'", r"'\''")
  98                      for x in [fn, title, artist, album_artist, album, date]]
  99
 100     album_artist_options = ''
 101     if album_artist:
 102         album_artist_options = "--tv 'TPE2=%s'" % album_artist
 103
 104     quoted_outfile = ('%s (%s) %02d %s.mp3' % (artist, album,
 105                                                track, title)).replace('/', '_')
 106
 107     pic_options = None
 108     if pics:
 109         (fd, picfn) = tempfile.mkstemp()
 110         f = os.fdopen(fd, 'wb')
 111         f.write(pics[0][7])
 112         f.close()
 113         pic_options = "--ti '%s'" % picfn
 114     try:
 115         run_or_die(3, "flac %s -cd %s '%s' | lame --id3v2-only --id3v2-latin1 --pad-id3v2-size 0 %s --tt '%s' --ta '%s' --tl '%s' --ty '%s' --tn %d %s %s - '%s'"
 116                    % (flac_options, ' '.join(skip_until), fn,
 117                       lame_options, title, artist, album, date, track,
 118                       pic_options, album_artist_options, quoted_outfile))
 119     finally:
 120         if pic_options:
 121             try:
 122                 os.unlink(picfn)
 123             except:
 124                 pass
 125
 126     return 0
 127
 128 ################################################################################
 129 # The master process
 130
 131 def tformat(m, s, c):
 132     return '%02d:%02d.%02d' % (m, s, c)
 133
 134 def get_decode_args(fn):
 135     l = []
 136
 137     p = Popen(['metaflac', '--no-utf8-convert', '--export-cuesheet-to=-', fn],
 138               stdout=PIPE)
 139     for line in (x.rstrip() for x in p.stdout):
 140         m = re.search(r'INDEX 01 (\d\d):(\d\d):(\d\d)$', line)
 141         if m != None:
 142             l.append(map(int, m.groups()))
 143     status = p.wait()
 144     # XXX dataloss!  check status
 145
 146     args = []
 147     for i in xrange(len(l)):
 148         arg = ['--skip=' + tformat(*l[i])]
 149         try:
 150             next = l[i + 1]
 151         except IndexError:
 152             next = None
 153         if next != None:
 154             if next[2] == 0:
 155                 if next[1] == 0:
 156                     arg.append('--until=' + tformat(next[0] - 1, 59, 74))
 157                 else:
 158                     arg.append('--until=' + tformat(next[0], next[1] - 1,
 159                                                     74))
 160             else:
 161                 arg.append('--until=' + tformat(next[0], next[1],
 162                                                 next[2] - 1))
 163
 164         args.append(arg)
 165
 166     # If no cue sheet, stick a dummy in here.
 167     if len(args) == 0:
 168         args = [[]]
 169
 170     return args
 171
 172 def get_tags(fn):
 173     """Return the ARTIST, ALBUM, and DATE tags followed by the TITLE tags
 174     in the file FN."""
 175
 176     tags = Tags()
 177
 178     p = Popen(['metaflac', '--no-utf8-convert', '--export-tags-to=-', fn],
 179               stdout=PIPE)
 180     tags.load(p.stdout)
 181
 182     # XXX dataloss!  check status
 183     status = p.wait()
 184
 185     return tags
 186
 187 def main(argv):
 188     # Control the exit code for any uncaught exceptions.
 189     try:
 190         parser = OptionParser()
 191         parser.disable_interspersed_args()
 192         parser.add_option('-X', '--debug', action='store_true', default=False)
 193         parser.add_option('-j', '--jobs', type='int', default=1)
 194         parser.add_option('--lame-options')
 195         parser.add_option('-q', '--quiet', action='store_true', default=False)
 196         parser.add_option('-v', '--verbose', action='store_true', default=False)
 197     except:
 198         traceback.print_exc()
 199         return 2
 200
 201     try:
 202         # Raises SystemExit on invalid options in argv.
 203         (options, args) = parser.parse_args(argv[1:])
 204     except Exception, error:
 205         if isinstance(error, SystemExit):
 206             return 1
 207         traceback.print_exc()
 208         return 2
 209
 210     separator = ' '
 211     try:
 212         global debug, flac_options, lame_options, quiet, verbose
 213         debug = options.debug
 214         lame_options = options.lame_options
 215         quiet = options.quiet
 216         verbose = options.verbose
 217
 218         jobs = []
 219         for fn in args:
 220             try:
 221                 args = get_decode_args(fn)
 222
 223                 tags = get_tags(fn)
 224                 album = tags.gets('ALBUM', separator=separator)
 225                 discnum = tags.gets('DISCNUMBER')
 226                 track = tags.gets('TRACKNUMBER')
 227
 228                 # lame doesn't seem to support disc number.
 229                 if discnum != None:
 230                     album = '%s (disc %s)' % (album, discnum)
 231
 232                 # Stupid hack: only a single-track file should have the
 233                 # TRACKNUMBER tag, so use it if set for the first pass through
 234                 # the loop.  At the end of the loop, we'll set $track for the
 235                 # next run, so this continues to work for multi-track files.
 236                 if track == None:
 237                     track = 1
 238                 else:
 239                     track = int(track)
 240
 241                 pics = flac.get_pictures(fn)
 242
 243                 for i in range(len(tags)):
 244                     title = tags.gets('TITLE', track, separator)
 245                     part = tags.gets('PART', track)
 246                     if part != None:
 247                         title = '%s - %s' % (title, part)
 248                     version = tags.gets('VERSION', track)
 249                     if version != None:
 250                         title = '%s (%s)' % (title, version)
 251                     artist = tags.get('ARTIST', track)
 252                     artist.extend(tags.get('FEATURING', track))
 253                     album_artist = tags.gets('ALBUMARTIST', track)
 254                     jobs.append([fn, title,
 255                                  ', '.join(artist),
 256                                  album_artist, album,
 257                                  tags.gets('DATE', track),
 258                                  track, args[i], pics])
 259                     track = i + 2
 260             except Exception, error:
 261                 sys.stderr.write(getattr(error, 'msg', ''))
 262                 traceback.print_exc()
 263                 sys.stderr.write('Continuing...\n')
 264
 265         def getjob(reap):
 266             try:
 267                 job = jobs.pop(0)
 268             except IndexError:
 269                 return
 270             return lambda: flac2mp3(*job)
 271         org.diplodocus.jobs.run(maxjobs=options.jobs, debug=debug, get_job=getjob)
 272     except Exception, error:
 273         if isinstance(error, SystemExit):
 274             raise
 275         # check all print_exc and format_exc in fa-flacd.py; i think
 276         # for some i don't do this msg print check
 277         sys.stderr.write(getattr(error, 'msg', ''))
 278         traceback.print_exc()
 279         return 2
 280
 281     return 0
 282
 283 if __name__ == '__main__':
 284     sys.exit(main(sys.argv))