19.2.4 Music Player Daemon

Music Player Daemon (MPD in short) allows remote access for playing music http://www.musicpd.org. MPD is designed for integrating a computer into a stereo system that provides control for music playback over a local network. The Bigloo class mpc implements a mpd client. All Bigloo players can be access via the MPD protocol, using the

The following example shows how to access a MPlayer music player using the MPD protocol with a simple Bigloo program:

(module mpd
   (library multimedia pthread)
   (main main))
   
(define (main argv)
   (let ((db (instantiate::mpd-database
		(directories (cdr argv))))
	 (serv (make-server-socket 6600))
	 (music (instantiate::mplayer)))
      (let loop ()
	 (thread-start! (make-mpd-connection-thread music db sock))
	 (loop))))

(define (make-mpd-connection-thread music db sock)
   (instantiate::pthread
      (body (lambda ()
	       (let ((pi (socket-input sock))
		     (po (socket-output sock)))
		  (input-timeout-set! pi 10000)
		  (output-timeout-set! po 10000)
		  (unwind-protect
		     (mpd music pi po db)
		     (socket-close sock)))))))

Bigloo Multimedia procedure: mpd music input-port output-port database [:log]

The function mpd implements a MPD server. It reads commands from the input-port and write results to output-port. The argument database, an instance of the mpd-database class, describes the music material that can be delivered by this player.

Bigloo Multimedia class: mpd-database

(class mpd-database
   (directories::pair-nil read-only)

The field directories contains the list of the directories that contains music files.

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