(module downstroke-mixer *
  (import scheme
          (chicken base)
          (chicken foreign))

  #> #include "SDL2/SDL_mixer.h" <#

  (define-foreign-type mix-chunk* (c-pointer "Mix_Chunk"))

  (define mix-open-audio!
    (foreign-lambda int "Mix_OpenAudio" int unsigned-short int int))

  (define mix-close-audio!
    (foreign-lambda void "Mix_CloseAudio"))

  (define mix-load-chunk
    (foreign-lambda* mix-chunk* ((c-string path))
      "C_return(Mix_LoadWAV(path));"))

  (define mix-free-chunk!
    (foreign-lambda void "Mix_FreeChunk" mix-chunk*))

  (define mix-play-channel
    (foreign-lambda int "Mix_PlayChannel" int mix-chunk* int))

  (define mix-default-format
    ((foreign-lambda* unsigned-short ()
       "C_return(MIX_DEFAULT_FORMAT);")))

  (define-foreign-type mix-music* (c-pointer "Mix_Music"))

  (define mix-load-mus
    (foreign-lambda mix-music* "Mix_LoadMUS" c-string))

  (define mix-play-music
    (foreign-lambda int "Mix_PlayMusic" mix-music* int))

  (define mix-free-music!
    (foreign-lambda void "Mix_FreeMusic" mix-music*))

  (define mix-halt-music
    (foreign-lambda int "Mix_HaltMusic"))

  (define mix-volume-music
    (foreign-lambda int "Mix_VolumeMusic" int))
)