Hi all, Below is a naïve, proof-of-concept implementation of building EMMS cache data via querying of the MusicPD database, using the 'connection' package[1] for TCP communication. On my system, emms-player-mpd-build-cache-from-db is roughly 80 times as fast as the existing cache-building method of running mp3info: whereas the latter takes 20+ minutes to complete, emms-player-mpd-build-cache-from-db finishes in less than 15 seconds.
Alexis. [1] Available via MELPA, or on GitHub here: https://github.com/myrkr/dictionary-el/blob/master/connection.el --- BEGIN proof-of-concept code --- (require 'connection) (setq conn (connection-open "localhost" "6600")) (generate-new-buffer "*test-cache*") (defun emms-player-mpd-build-cache-from-db () "Create the EMMS cache from the contents of the MusicPD database." (interactive) (let ((track-count 0) (artists-string "") (artists-list '())) ;; Get list of all artists in MPD database. (connection-send conn "list artist\n") (setq artists-string (connection-read conn "\nOK\n")) (with-temp-buffer (progn (insert artists-string) (goto-char (point-min)) (while (re-search-forward "Artist: \\([^\n]+\\)" nil t) (setq artists-list (cons (match-string 1) artists-list))))) ;; Get list of all tracks by each artist. (dolist (artist artists-list) (let ((artist-tracks-string "") (artist-tracks-list '())) (connection-send conn (concat "list title artist \"" artist "\"\n")) (setq artist-tracks-string (connection-read conn "\nOK\n")) (with-temp-buffer (progn (insert artist-tracks-string) (goto-char (point-min)) (while (re-search-forward "Title: \\([^\n]+\\)" nil t) (setq artist-tracks-list (cons (match-string 1) artist-tracks-list))))) (dolist (track artist-tracks-list) (let ((metadata-string "") (track-metadata '()) (track-file "") (track-artist "") (track-title "") (track-album "") (track-number "") (track-time "") (track-mtime "") (track-year "") (track-genre "")) ;; Escape double-quotes in name of track. (setq track (replace-regexp-in-string "\042" (concat "\134" "\042") track nil t)) (connection-send conn (concat "find artist \"" artist "\" " "title \"" track "\"\n")) (setq metadata-string (connection-read conn "\nOK\n")) (with-temp-buffer (insert metadata-string) (goto-char (point-min)) (while (re-search-forward "^\\([^:]+\\): \\([^\n]+\\)$" nil t) (setq track-metadata (cons `(,(match-string 1) . ,(match-string 2)) track-metadata)))) (setq track-file (cdr (assoc "file" track-metadata))) (setq track-artist (cdr (assoc "Artist" track-metadata))) (setq track-title (cdr (assoc "Title" track-metadata))) (setq track-album (cdr (assoc "Album" track-metadata))) (setq track-number (cdr (assoc "Track" track-metadata))) (setq track-time (cdr (assoc "Time" track-metadata))) (setq track-mtime (date-to-time (cdr (assoc "Last-Modified" track-metadata)))) (setq track-year (cdr (assoc "Date" track-metadata))) (setq track-genre (cdr (assoc "Genre" track-metadata))) (setq track-count (+ 1 track-count)) (if (= 0 (mod track-count 200)) (message (concat "Tracks processed: " (format "%d" track-count)))) (print `(*track* (type . file) (name . ,track-file ) (metadata) (info-artist . ,track-artist) (info-title . ,track-title) (info-album . ,track-album) (info-tracknumber . ,track-number) (info-playing-time . ,track-time) (info-year . ,track-year) (info-genre . ,track-genre) (info-mtime ,@track-mtime)) (get-buffer "*test-cache*")))))))) --- END proof-of-concept code --- _______________________________________________ Emms-help mailing list [email protected] https://lists.gnu.org/mailman/listinfo/emms-help
