diff options
| -rw-r--r-- | Makefile.am | 1 | ||||
| -rw-r--r-- | sdl2/audio.scm | 48 | ||||
| -rw-r--r-- | sdl2/bindings.scm | 14 |
3 files changed, 63 insertions, 0 deletions
diff --git a/Makefile.am b/Makefile.am index 2e6e48b..40b1548 100644 --- a/Makefile.am +++ b/Makefile.am @@ -51,6 +51,7 @@ SOURCES = \ sdl2/surface.scm \ sdl2/render.scm \ sdl2/video.scm \ + sdl2/audio.scm \ sdl2/events.scm \ sdl2/input/keyboard.scm \ sdl2/input/joystick.scm \ diff --git a/sdl2/audio.scm b/sdl2/audio.scm new file mode 100644 index 0000000..0e35d4e --- /dev/null +++ b/sdl2/audio.scm @@ -0,0 +1,48 @@ +;;; guile-sdl2 --- FFI bindings for SDL2 +;;; Copyright © 2022 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: +;; +;; Platform-independent audio API. +;; +;;; Code: + +(define-module (sdl2 audio) + #:use-module (sdl2) + #:use-module ((sdl2 bindings) #:prefix ffi:) + #:use-module (system foreign) + #:export (audio-device-name + num-audio-devices)) + +(define* (num-audio-devices #:optional capture?) + "Return the number of recording or playback audio devices available. + If CAPTURE is not given or #f, the number of playback devices is +returned. If CAPTURE? is #t, the number of recording devices is +returned." + (ffi:sdl-get-num-audio-devices (if capture? 1 0))) + +(define* (audio-device-name index #:optional capture?) + "Return the name of the audio device at INDEX. If CAPTURE? is not +given or #f, the name of the playback device for INDEX is returned. +If CAPTURE? is #t, the name of the recording device for INDEX is +returned." + (let ((ptr (ffi:sdl-get-audio-device-name index (if capture? 0 1)))) + (if (null-pointer? ptr) + #f + (pointer->string ptr)))) diff --git a/sdl2/bindings.scm b/sdl2/bindings.scm index 02988ad..cb8dd97 100644 --- a/sdl2/bindings.scm +++ b/sdl2/bindings.scm @@ -1240,6 +1240,20 @@ RETURN-TYPE and accept arguments of ARG-TYPES." (define-public AUDIO_F32MSB #x9120) (define-public AUDIO_F32 AUDIO_F32LSB) +(define-public SDL_AUDIO_ALLOW_FREQUENCY_CHANGE 1) +(define-public SDL_AUDIO_ALLOW_FORMAT_CHANGE 2) +(define-public SDL_AUDIO_ALLOW_CHANNELS_CHANGE 4) +(define-public SDL_AUDIO_ALLOW_SAMPLES_CHANGE 8) + +(define-foreign sdl-get-num-audio-devices + int "SDL_GetNumAudioDevices" (list int)) + +(define-foreign sdl-get-audio-device-name + '* "SDL_GetAudioDeviceName" (list int int)) + +(define-foreign sdl-open-audio-device + int "SDL_OpenAudioDevice" (list '* int '* '* int)) + ;;; ;;; Joystick |