Add Standardise Performers plugin

contrib/plugins/standardise_performers.py

@@ -0,0 +1,55 @@
+# -*- coding: utf-8 -*-
+
+PLUGIN_NAME = _(u'Standardise Performers')
+PLUGIN_AUTHOR = u'Sophist'
+PLUGIN_DESCRIPTION = u'''Splits multi-instrument performer tags into single
+instruments and combines names so e.g. (from 10cc by 10cc track 1):
+<pre>
+Performer [acoustic guitar, bass, dobro, electric guitar and tambourine]: Graham Gouldman
+Performer [acoustic guitar, electric guitar, grand piano and synthesizer]: Lol Creme
+Performer [electric guitar, moog and slide guitar]: Eric Stewart
+</pre>
+becomes:
+<pre>
+Performer [acoustic guitar]: Graham Gouldman; Lol Creme
+Performer [bass]: Graham Gouldman
+Performer [dobro]: Graham Gouldman
+Performer [electric guitar]: Eric Stewart; Graham Gouldman; Lol Creme
+Performer [grand piano]: Lol Creme
+Performer [moog]: Eric Stewart
+Performer [slide guitar]: Eric Stewart
+Performer [synthesizer]: Lol Creme
+Performer [tambourine]: Graham Gouldman
+</pre>
+'''
+PLUGIN_VERSION = '0.1'
+PLUGIN_API_VERSIONS = ["1.3.0"]
+
+import re
+from picard import log
+from picard.metadata import register_track_metadata_processor
+
+standardise_performers_split = re.compile(r", | and ").split
+
+def standardise_performers(album, metadata, *args):
+    for key, values in metadata.rawitems():
+        if not key.startswith('performer:') \
+        and not key.startswith('~performersort:'):
+            continue
+        mainkey, subkey = key.split(':', 1)
+        if not subkey:
+            continue
+        instruments = standardise_performers_split(subkey)
+        if len(instruments) == 1:
+            continue
+        log.debug("%s: Splitting Performer [%s] into separate performers",
+            PLUGIN_NAME,
+            subkey,
+            )
+        for instrument in instruments:
+            newkey = '%s:%s' % (mainkey, instrument)
+            for value in values:
+                metadata.add_unique(newkey, value)
+        del metadata[key]
+
+register_track_metadata_processor(standardise_performers, priority = True)