GSoC Project: GNOME Music and MusicBrainz Integration

Google Summer of Code - 2019:

• Student: Sumaid ("sumaid" on irc)
• Mentor: Jean Felder ("ptitjano" on irc)
• Blog Link: https://jsoc.home.blog/

Objectives of the project:

• Retrieve MusicBrainz IDs for files
• Retrieve metadata from AcoustID database - return all the results
• Add functionality to edit tags of songs
• Retrieve tags for songs/albums from MusicBrainz database
• Retrieve cover-art for music albums

a) MusicBrainz IDs:

Grilo currently supports the following MusicBrainz IDs:

• Track ID
• Recording ID
• Release ID
• Release Group ID
• Artist ID

Above 5 MBIDs should be enough to retrieve cover-art and tags, hence we'll store only these 5 MBIDs in the tracker.

• Store the MBIDs in the tracker

• If a file already has MBIDs, then extract them through tracker-miners extractors:

  • • GStreamer Extractor

    GStreamer does not support Recording and Release Group IDs tags. Hence support for same needs to be added in GStreamer.

    • • Repair support for MBIDs in GStreamer
  • • MP3 Extractor
  • • OGG Extractor

Metadata Retrieval:

Both songs and albums will have similar parts

Metadata Tags for songs:

• Title
• Album
• Artist
• Track Number
• Disc Number
• Year ( Creation Year )

Timeline:

Week 1 ( Till 11th June): All of the following have merge requests in progress:

• Store the MBIDs in the tracker
• Finish ogg extractor [[Easy]]
• Finish mp3 extractor [[Medium]]
• Finish MBID Tags repair in GStreamer [[Medium]]
• Finish gstreamer extractor [[Easy]]
• Deprecate use of album id [[Medium]]
• Grilo-tracker MBIDs mapping [[Easy]]

Week 2 ( 12th June - 18th June ):

• Unbreak Writeback => Carlos Garnacho's working on it
• Query MusicBrainz IDs in GNOME Music [[Medium]]
• Replace album id instance in grl-musicbrainz
• Retrieve Cover art from MusicBrainz

Week 3 ( 19th June - 24th June ):

• Make a plan for metadata retrieval

Week 4 ( 28th June - 5th July ):

• Tracker: Store Chromaprint in Tracker Database
• Tracker-miners: Extract acoustid fingerprint with mp3 extractor
• Tracker-miners: Extract acoustid fingerprint with ogg extractor
• Tracker-miners: Extract acoustid fingerprint with gstreamer extractor
• Grilo: Introduce Chromaprint Grilo Property (Not Required)
• Add Chromaprint tag support to GST: Update GST MR
• Grilo-Plugins: AcoustID Return Multiple Results - Query Operation

Week 5 ( 5th July - 26th July ):

• Tag Editor: Songs:

• Basic Functionality
• Clean up UI

• Writeback:

• Writeback of tags & chromaprint
• Tracker Properties Writeback Flag
• Add more keys to writable keys

Final Phase:

• Grilo-Plugins: Add query operation to acoustid plugin
• Grilo-Plugins: Fix one minor issue in acoustid plugin
• Grilo-Plugins: grl-musicbrainz Lua source
• Music: Tag Editor MusicBrainz Plugin Support

• Tag Editor: Albums

• Music: Albums Tagging using acoustid & musicbrainz
• Music: MusicBrainz CoverArt Plugin Support
• Grilo-Plugins: grl-musicbrainz-coverart Plugin

Future Goals:

• MusicBrainz IDs should be stored similar to hashValue & hashAlgorithm in tracker db
• AcoustID Plugin should allow retrieval through AcoustID ( This will require introducing acoustid in tracker/grilo)
• Multi-songs & Multi-albums Retrieval
• Upload a local image as cover art for the file
• Adding missing files to albums

References:

Past Work

GSoC Idea

Official MusicBrainz mapping