1 files changed, 145 insertions, 0 deletions
diff --git a/cli/ape2id3.py b/cli/ape2id3.py
new file mode 100755
index 0000000..8651a2f
--- /dev/null
+++ b/cli/ape2id3.py
@@ -0,0 +1,145 @@
+#! /usr/bin/env python
+import sys
+from optparse import OptionParser
+import mutagen
+from mutagen.apev2 import APEv2
+from mutagen.id3 import ID3, TXXX
+
+def convert_gain(gain):
+   if gain[-3:] == " dB":
+       gain = gain[:-3]
+   try:
+       gain = float(gain)
+   except ValueError:
+       raise ValueError, "invalid gain value"
+   return "%.2f dB" % gain
+def convert_peak(peak):
+   try:
+       peak = float(peak)
+   except ValueError:
+       raise ValueError, "invalid peak value"
+   return "%.6f" % peak
+
+REPLAYGAIN_TAGS = (
+   ("mp3gain_album_minmax", None),
+   ("mp3gain_minmax", None),
+   ("replaygain_album_gain", convert_gain),
+   ("replaygain_album_peak", convert_peak),
+   ("replaygain_track_gain", convert_gain),
+   ("replaygain_track_peak", convert_peak),
+)
+
+
+class Logger(object):
+   def __init__(self, log_level, prog_name):
+       self.log_level = log_level
+       self.prog_name = prog_name
+       self.filename = None
+   def prefix(self, msg):
+       if self.filename is None:
+           return msg
+       return "%s: %s" % (self.filename, msg)
+   def debug(self, msg):
+       if self.log_level >= 4:
+           print self.prefix(msg)
+   def info(self, msg):
+       if self.log_level >= 3:
+           print self.prefix(msg)
+   def warning(self, msg):
+       if self.log_level >= 2:
+           print self.prefix("WARNING: %s" % msg)
+   def error(self, msg):
+       if self.log_level >= 1:
+           sys.stderr.write("%s: %s\n" % (self.prog_name, msg))
+   def critical(self, msg, retval=1):
+       self.error(msg)
+       sys.exit(retval)
+
+class Ape2Id3(object):
+   def __init__(self, logger, force=False):
+       self.log = logger
+       self.force = force
+   def convert_tag(self, name, value):
+       pass
+   def copy_replaygain_tag(self, apev2, id3, name, converter=None):
+       self.log.debug("processing '%s' tag" % name)
+       if name not in apev2:
+           self.log.info("no APEv2 '%s' tag found, skipping tag" % name)
+           return False
+       if not self.force and ("TXXX:%s" % name) in id3:
+           self.log.info("ID3 '%s' tag already exists, skpping tag" % name)
+           return False
+       value = str(apev2[name])
+       if callable(converter):
+           self.log.debug("converting APEv2 '%s' tag from '%s'" %
+                          (name, value))
+           try:
+               value = converter(value)
+           except ValueError:
+               self.log.warning("invalid value for APEv2 '%s' tag" % name)
+               return False
+           self.log.debug("converted APEv2 '%s' tag to '%s'" % (name, value))
+       id3.add(TXXX(encoding=1, desc=name, text=value))
+       self.log.info("added ID3 '%s' tag with value '%s'" % (name, value))
+       return True
+   def copy_replaygain_tags(self, filename):
+       self.log.filename = filename
+       self.log.debug("begin processing file")
+       try:
+           apev2 = APEv2(filename)
+       except mutagen.apev2.error:
+           self.log.info("no APEv2 tag found, skipping file")
+           return
+       except IOError:
+           e = sys.exc_info()
+           self.log.error("%s" % e[1])
+           return
+       try:
+           id3 = ID3(filename)
+       except mutagen.id3.error:
+           self.log.info("no ID3 tag found, creating one")
+           id3 = ID3()
+       modified = False
+       for name, converter in REPLAYGAIN_TAGS:
+           copied = self.copy_replaygain_tag(apev2, id3, name, converter)
+           if copied:
+               modified = True
+       if modified:
+           self.log.debug("saving modified ID3 tag")
+           id3.save(filename)
+       self.log.debug("done processing file")
+       self.log.filename = None
+
+def main(prog_name, options, args):
+   logger = Logger(options.log_level, prog_name)
+   ape2id3 = Ape2Id3(logger, force=options.force)
+   for filename in args:
+       ape2id3.copy_replaygain_tags(filename)
+
+if __name__ == "__main__":
+   parser = OptionParser(version="0.1", usage="%prog [OPTION]... FILE...",
+                         description="Copy APEv2 ReplayGain tags on "
+                                     "FILE(s) to ID3v2.")
+   parser.add_option("-q", "--quiet", dest="log_level",
+                     action="store_const", const=0, default=1,
+                     help="do not output error messages")
+   parser.add_option("-v", "--verbose", dest="log_level",
+                     action="store_const", const=3,
+                     help="output warnings and informational messages")
+   parser.add_option("-d", "--debug", dest="log_level",
+                     action="store_const", const=4,
+                     help="output debug messages")
+   parser.add_option("-f", "--force", dest="force",
+                     action="store_true", default=False,
+                     help="force overwriting of existing ID3v2 "
+                          "ReplayGain tags")
+   prog_name = parser.get_prog_name()
+   options, args = parser.parse_args()
+   if len(args) < 1:
+       parser.error("no files specified")
+   try:
+       main(prog_name, options, args)
+   except KeyboardInterrupt:
+       pass
+
+# vim: set expandtab shiftwidth=4 softtabstop=4 textwidth=79: