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