|
From: | Michael Olson |
Subject: | Re: [emms-help] Problems getting emms-player-mpd working, and solutions |
Date: | Fri, 1 Aug 2014 08:55:06 -0700 |
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
address@hidden
https://lists.gnu.org/mailman/listinfo/emms-help
[Prev in Thread] | Current Thread | [Next in Thread] |