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(use-modules (chickadee)
(chickadee audio)
(chickadee math vector)
(chickadee graphics font)
(ice-9 match))
(define effect #f)
(define music #f)
(define music-source #f)
(define playlist
#("audio/the-forgotten-land.mp3"
"audio/venus.wav"
"audio/spooky-dungeon.ogg"))
(define playlist-index -1)
(define status-message "")
(define status-position (vec2 200.0 240.0))
(define instructions
"VAMP (Very Advanced Music Player)
CONTROLS:
SPACE - play/pause
N - next music file
P - previous music file
L - play an explosion sound just because
Q - quit")
(define instructions-position (vec2 200.0 400.0))
(define (playlist-move n)
(source-stop music-source)
(set! playlist-index (modulo (+ playlist-index n) (vector-length playlist)))
(let ((file-name (vector-ref playlist playlist-index)))
(set! music (load-audio file-name #:mode 'stream))
(set-source-audio! music-source music)
(source-play music-source)
(set! status-message (string-append "NOW PLAYING: " (basename file-name)))))
(define (load)
(set! effect (load-audio "audio/explosion.wav"))
(set! music-source (make-source))
(playlist-move 1))
(define (update dt)
(when (source-stopped? music-source)
(playlist-move 1)))
(define (draw alpha)
(when (>= playlist-index 0)
(draw-text status-message status-position))
(draw-text instructions instructions-position))
(define (key-press key scancode modifiers repeat?)
(match key
('q (abort-game))
('space (source-toggle music-source))
('l (audio-play effect))
('n
(playlist-move 1))
('p
(playlist-move -1))
(_ #t)))
(run-game #:load load #:update update #:key-press key-press #:draw draw)
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