Add SDL2_mixer bindings.

* sdl2/bindings.scm: Add "AUDIO_*" constants.
* sdl2/bindings/mixer.scm: New file.
* sdl2/mixer.scm: New file.
* Makefile.am (SOURCES): Add new files.

1 files changed, 131 insertions, 0 deletions

diff --git a/sdl2/bindings/mixer.scm b/sdl2/bindings/mixer.scm
new file mode 100644
index 0000000..638b409
--- /dev/null
+++ b/sdl2/bindings/mixer.scm
@@ -0,0 +1,131 @@
+;;; guile-sdl2 --- FFI bindings for SDL2
+;;; Copyright © 2015 David Thompson <davet@gnu.org>
+;;;
+;;; This file is part of guile-sdl2.
+;;;
+;;; Guile-sdl2 is free software; you can redistribute it and/or modify
+;;; it under the terms of the GNU Lesser General Public License as
+;;; published by the Free Software Foundation; either version 3 of the
+;;; License, or (at your option) any later version.
+;;;
+;;; Guile-sdl2 is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;;; General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU Lesser General Public
+;;; License along with guile-sdl2.  If not, see
+;;; <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+;;
+;; Low-level FFI bindings for SDL2_mixer.
+;;
+;;; Code:
+
+(define-module (sdl2 bindings mixer)
+  #:use-module (rnrs bytevectors)
+  #:use-module (system foreign)
+  #:use-module (sdl2 config)
+  #:use-module (sdl2 bindings))
+
+(define sdl-mixer-func
+  (let ((lib (dynamic-link %libsdl2-mixer)))
+    (lambda (return-type function-name arg-types)
+      "Return a procedure for the foreign function FUNCTION-NAME in
+the SDL2_mixer shared library.  That function must return a value of
+RETURN-TYPE and accept arguments of ARG-TYPES."
+      (pointer->procedure return-type
+                          (dynamic-func function-name lib)
+                          arg-types))))
+
+(define-syntax-rule (define-foreign name return-type func-name arg-types)
+  (define-public name
+    (sdl-mixer-func return-type func-name arg-types)))
+
+(define-public MIX_INIT_FLAC       #x00000001)
+(define-public MIX_INIT_MOD        #x00000002)
+(define-public MIX_INIT_MODPLUG    #x00000004)
+(define-public MIX_INIT_MP3        #x00000008)
+(define-public MIX_INIT_OGG        #x00000010)
+(define-public MIX_INIT_FLUIDSYNTH #x00000020)
+
+(define-public MIX_CHANNELS 8)
+(define-public MIX_DEFAULT_FREQUENCY 22050)
+(define-public MIX_MAX_VOLUME 128)
+(define-public MIX_DEFAULT_FORMAT
+  (if (eq? (native-endianness) 'little)
+      AUDIO_S16LSB
+      AUDIO_S16MSB))
+
+(define-foreign mix-init
+  int "Mix_Init" (list int))
+
+(define-foreign mix-quit
+  void "Mix_Quit" '())
+
+(define-foreign mix-open-audio
+  int "Mix_OpenAudio" (list int uint16 int int))
+
+(define-foreign mix-close-audio
+  void "Mix_CloseAudio" '())
+
+(define-foreign mix-load-wav-rw
+  '* "Mix_LoadWAV_RW" (list '* int))
+
+(define-foreign mix-free-chunk
+  void "Mix_FreeChunk" '(*))
+
+(define-foreign mix-volume-chunk
+  int "Mix_VolumeChunk" (list '* int))
+
+(define-foreign mix-volume
+  int "Mix_Volume" (list int int))
+
+(define-foreign mix-play-channel-timed
+  int "Mix_PlayChannelTimed" (list int '* int int))
+
+(define-foreign mix-pause
+  void "Mix_Pause" (list int))
+
+(define-foreign mix-resume
+  void "Mix_Resume" (list int))
+
+(define-foreign mix-halt-channel
+  void "Mix_HaltChannel" (list int))
+
+(define-foreign mix-playing
+  int "Mix_Playing" (list int))
+
+(define-foreign mix-paused
+  int "Mix_Paused" (list int))
+
+(define-foreign mix-load-mus
+  '* "Mix_LoadMUS" '(*))
+
+(define-foreign mix-free-music
+  void "Mix_FreeMusic" '(*))
+
+(define-foreign mix-play-music
+  int "Mix_PlayMusic" (list '* int))
+
+(define-foreign mix-volume-music
+  int "Mix_VolumeMusic" (list int))
+
+(define-foreign mix-pause-music
+  void "Mix_PauseMusic" '())
+
+(define-foreign mix-resume-music
+  void "Mix_ResumeMusic" '())
+
+(define-foreign mix-rewind-music
+  void "Mix_RewindMusic" '())
+
+(define-foreign mix-halt-music
+  void "Mix_HaltMusic" '())
+
+(define-foreign mix-playing-music
+  int "Mix_PlayingMusic" '())
+
+(define-foreign mix-paused-music
+  int "Mix_PausedMusic" '())