MusicBrainz Picard/Plugins/API
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API documentation for MusicBrainz Picard plugins.
Metadata Processors
MusicBrainz metadata can be post-processed at two levels, album and track.
Album metadata example:
1 PLUGIN_NAME = "Disc Numbers" 2 PLUGIN_AUTHOR = "Lukas Lalinsky" 3 PLUGIN_DESCRIPTION = "Moves disc numbers from album titles to tags." 4 5 from picard.metadata import register_album_metadata_processor 6 import re 7 8 def remove_discnumbers(metadata, release): 9 matches = re.search(r"\(disc (\d+)\)", metadata["album"]) 10 if matches: 11 metadata["discnumber"] = matches.group(1) 12 metadata["album"] = re.sub(r"\(disc \d+\)", "", metadata["album"]) 13 14 register_album_metadata_processor(remove_discnumbers)
Track metadata example:
1 PLUGIN_NAME = "Feat. Artists" 2 PLUGIN_AUTHOR = "Lukas Lalinsky" 3 PLUGIN_DESCRIPTION = "Removes feat. artists from track titles." 4 5 from picard.metadata import register_track_metadata_processor 6 import re 7 8 def remove_featartists(metadata, release, track): 9 metadata["title"] = re.sub(r"\(feat. [^)]*\)", "", metadata["title"]) 10 11 register_track_metadata_processor(remove_featartists)
File Formats
Example:
1 PLUGIN_NAME = "..." 2 PLUGIN_AUTHOR = "..." 3 PLUGIN_DESCRIPTION = "..." 4 5 from picard.file import File 6 from picard.formats import register_format 7 8 class MyFile(File): 9 EXTENSIONS = [".foo"] 10 NAME = "Foo Audio" 11 def read(self): 12 .... 13 def save(self): 14 .... 15 16 register_format(MyFile)
Tagger Script Functions
To define new tagger script function use register_script_function(function, name=None)
from module picard.script
.
Example:
1 PLUGIN_NAME = "Initials" 2 PLUGIN_AUTHOR = "Lukas Lalinsky" 3 PLUGIN_DESCRIPTION = "Provides tagger script function $initials(text)." 4 5 from picard.script import register_script_function 6 7 def initials(parser, text): 8 return "".join(a[:1] for a in text.split(" ") if a[:1].isalpha()) 9 10 register_script_function(initials)
register_script_function
supports two optional arguments:
- eval_args: If this is False, the arguments will not be evaluated before being passed to function.
- check_argcount: If this is False the number of arguments passed to the function will not be verified.
The default value for both of them is True.
Context Menu Actions
Right-click context menu actions can be added to albums, tracks, files in Unmatched Files, Clusters and the ClusterList (parent folder of Clusters).
Example:
1 PLUGIN_NAME = u'Remove Perfect Albums' 2 PLUGIN_AUTHOR = u'ichneumon, hrglgrmpf' 3 PLUGIN_DESCRIPTION = u'''Remove all perfectly matched albums from the selection.''' 4 PLUGIN_VERSION = '0.2' 5 PLUGIN_API_VERSIONS = ['0.15'] 6 7 from picard.album import Album 8 from picard.ui.itemviews import BaseAction, register_album_action 9 10 class RemovePerfectAlbums(BaseAction): 12 NAME = 'Remove perfect albums' 13 14 def callback(self, objs): 15 for album in objs: 16 if isinstance(album, Album) and album.is_complete() and album.get_num_unmatched_files() == 0\ 17 and album.get_num_matched_tracks() == len(list(album.iterfiles()))\ 18 and album.get_num_unsaved_files() == 0 and album.loaded == True: 19 self.tagger.remove_album(album) 20 21 register_album_action(RemovePerfectAlbums())
Use register_x_action where x is album, track, file, cluster or clusterlist.