1 files changed, 45 insertions, 0 deletions
diff --git a/sound.scm b/sound.scm
new file mode 100644
index 0000000..a0bb945
--- /dev/null
+++ b/sound.scm
@@ -0,0 +1,45 @@
+(module downstroke/sound *
+  (import scheme
+          (chicken base)
+          (only srfi-1 for-each)
+          downstroke/mixer)
+
+  (define *sound-registry* '())
+  (define *music* #f)
+
+  (define (init-audio!)
+    (mix-open-audio! 44100 mix-default-format 2 512))
+
+  (define (load-sounds! sound-alist)
+    (set! *sound-registry*
+      (map (lambda (pair)
+             (cons (car pair) (mix-load-chunk (cdr pair))))
+           sound-alist)))
+
+  (define (play-sound sym)
+    (let ((entry (assq sym *sound-registry*)))
+      (when (and entry (cdr entry))
+        (mix-play-channel -1 (cdr entry) 0))))
+
+  (define (load-music! path)
+    (set! *music* (mix-load-mus path)))
+
+  (define (play-music! volume)
+    (when *music*
+      (mix-play-music *music* -1)
+      (mix-volume-music (inexact->exact (round (* volume 128))))))
+
+  (define (stop-music!) (mix-halt-music))
+
+  (define (set-music-volume! volume)
+    (mix-volume-music (inexact->exact (round (* volume 128)))))
+
+  (define (cleanup-audio!)
+    (when *music*
+      (mix-halt-music)
+      (mix-free-music! *music*)
+      (set! *music* #f))
+    (for-each (lambda (pair) (mix-free-chunk! (cdr pair)))
+              *sound-registry*)
+    (set! *sound-registry* '())
+    (mix-close-audio!)))