wolffd@0: % ---
wolffd@0: % This is the wrapper and loader class for Last.Fm db
wolffd@0: % and related data
wolffd@0: % ---
wolffd@0: 
wolffd@0: classdef LFMTagsDB < handle
wolffd@0:     
wolffd@0:     properties
wolffd@0:        
wolffd@0:        % connects the last.fm artists to MTTartist ids
wolffd@0:        matching_artists;
wolffd@0:        
wolffd@0:        % saves the last fm tags for last.fm artist ids
wolffd@0:        tagdb;
wolffd@0:     end
wolffd@0:     
wolffd@0:     properties(Dependent)
wolffd@0:         
wolffd@0:        lexicon;
wolffd@0:     end
wolffd@0:     
wolffd@0:     
wolffd@0:     methods
wolffd@0:         function db = LFMTagsDB(artistdb)
wolffd@0:             
wolffd@0:             % load data
wolffd@0:             load last.fm.mat;
wolffd@0: 
wolffd@0:             % ---
wolffd@0:             % NOTE: here, we save the corresponding magnatagatune
wolffd@0:             % artists. There make sure that the last.fm artists 
wolffd@0:             % are properly associated!
wolffd@0:             %
wolffd@0:             % finally, the central last.fm artist index will refer 
wolffd@0:             % to both the MTT artist database and the tags
wolffd@0:             % ----
wolffd@0:             
wolffd@0:             % get all the clips artists
wolffd@0:             artists = artistdb.lexicon;
wolffd@0: 
wolffd@0:             % assign artists to Last.Fm artists
wolffd@0:             lexicon = [];
wolffd@0:             annots = [];
wolffd@0:             
wolffd@0:             justfmartists = fmartists(:,2);
wolffd@0:             for i = 1:numel(justfmartists)
wolffd@0:                 
wolffd@0:                 %get matching MTT for each Last.fm artist
wolffd@0:                 pos = strcellfind(artists, justfmartists{i});
wolffd@0:                 
wolffd@0:                 % save its id 
wolffd@0:                 if ~isempty(pos)
wolffd@0:                     associds(i) = artistdb.get_annot_id(artists{pos});
wolffd@0:                 end
wolffd@0:             end
wolffd@0:             
wolffd@0:             % ---
wolffd@0:             % TODO: assert wheather if the fmartist id actually coincide
wolffd@0:             % justfmartists_ids = matching_artists.get_annotid(justfmartists);
wolffd@0:             % ---
wolffd@0:             
wolffd@0:             % call superclass constructor
wolffd@0:             db.tagdb = AnnotDB(fmartist_annots_names, ...
wolffd@0:                 fmartist_annots, associds);
wolffd@0:             
wolffd@0:             % save the mathing artists
wolffd@0:             db.matching_artists = AnnotDB('clips_by_annot', ...
wolffd@0:                 justfmartists, associds);
wolffd@0:             
wolffd@0:         end
wolffd@0:     end
wolffd@0:     
wolffd@0:     
wolffd@0:     methods
wolffd@0:         
wolffd@0:        % retrieve annot by clip
wolffd@0:        function [out, score, aid] = annots(db, clip)
wolffd@0:            
wolffd@0:            % ---
wolffd@0:            % NOTE: we retrieve the tags for the artist matching the clips
wolffd@0:            % one
wolffd@0:            % ---
wolffd@0:            
wolffd@0:            fma_id = db.matching_artists.annotids_for_owner(clip.artist_id());
wolffd@0:            
wolffd@0:            artist = clip.artist();
wolffd@0:            
wolffd@0:            if ~isempty(fma_id)
wolffd@0:                
wolffd@0:                 [out, score, aid] = db.tagdb.annots(fma_id);
wolffd@0:            else
wolffd@0:                warning('Artist %s not found in Last.fm tags DB', artist);
wolffd@0:            end
wolffd@0:        end 
wolffd@0:        
wolffd@0:         function out = annotids_for_owner(db, clip)
wolffd@0:            
wolffd@0:            % ---
wolffd@0:            % NOTE: we retrieve the tags for the artist matching the clips
wolffd@0:            % one
wolffd@0:            % ---
wolffd@0:            
wolffd@0:            fma_id = db.matching_artists.annotids_for_owner(clip.artist_id());
wolffd@0:            
wolffd@0:            artist = clip.artist();
wolffd@0:            
wolffd@0:            if ~isempty(fma_id)
wolffd@0:                
wolffd@0:                 out = db.tagdb.annotids_for_owner( fma_id );
wolffd@0:            else
wolffd@0:                warning('Artist %s not found in Last.fm tags DB', artist);
wolffd@0:            end
wolffd@0:         end 
wolffd@0:        
wolffd@0:         function out = get.lexicon(db)
wolffd@0:         % gives back all the tags
wolffd@0:             
wolffd@0:             out = db.tagdb.lexicon;
wolffd@0:         end
wolffd@0:     end
wolffd@0:     
wolffd@0:     methods(Static)
wolffd@0:         
wolffd@0:         
wolffd@0:     end
wolffd@0: end
wolffd@0:     
wolffd@0:     
wolffd@0: