82 lines
2.5 KiB
Racket
82 lines
2.5 KiB
Racket
#lang racket/base
|
|
|
|
(require ffi/unsafe
|
|
ffi/unsafe/define
|
|
setup/dirs
|
|
)
|
|
|
|
(provide ;_libao_pointer
|
|
AO-FMT-LITTLE AO-FMT-BIG AO-FMT-NATIVE
|
|
ao_initialize
|
|
ao_default_driver_id
|
|
ao_driver_id
|
|
ao_open_live
|
|
ao_play
|
|
ao_close
|
|
ao_shutdown
|
|
ao_append_option
|
|
make-ao_sample_format
|
|
ao_sample_format-bits
|
|
ao_sample_format-rate
|
|
ao_sample_format-channels
|
|
ao_sample_format-byte_format
|
|
ao_sample_format-matrix
|
|
(all-from-out ffi/unsafe)
|
|
)
|
|
|
|
|
|
(define-ffi-definer define-libao
|
|
(ffi-lib "libao" '("3" "4" "5" #f)
|
|
#:get-lib-dirs (lambda ()
|
|
(cons (build-path ".") (get-lib-search-dirs)))
|
|
#:fail (lambda ()
|
|
(ffi-lib (get-lib-path "libao-4.dll")))
|
|
))
|
|
|
|
|
|
(define _libao-pointer (_cpointer 'ao_device))
|
|
(define-cstruct _ao_sample_format (
|
|
[bits _int] ; bits per sample
|
|
[rate _int] ; samples per second in a single channel
|
|
[channels _int] ; number of audio channels
|
|
[byte_format _int] ; byte ordering in sample, see "constants" below
|
|
[matrix _pointer] ; channel input matrix
|
|
))
|
|
|
|
(define-cstruct _ao_option (
|
|
[key _pointer]
|
|
[value _pointer]
|
|
[next _pointer] ; number of audio channels (list)
|
|
))
|
|
|
|
(define AO-FMT-LITTLE 1)
|
|
(define AO-FMT-BIG 2)
|
|
(define AO-FMT-NATIVE 4)
|
|
|
|
; void ao_initialize();
|
|
(define-libao ao_initialize (_fun -> _void))
|
|
|
|
; int ao_default_driver_id();
|
|
(define-libao ao_default_driver_id (_fun -> _int))
|
|
|
|
; ao_device* ao_open_live(int driver_id, ao_sample_format *format, ao_option *options);
|
|
(define-libao ao_open_live (_fun _int _pointer _pointer -> _libao-pointer))
|
|
|
|
; int ao_play(ao_device *device, char *output_samples, uint_32 num_bytes);
|
|
(define-libao ao_play (_fun _libao-pointer _pointer _uint32 -> _int))
|
|
|
|
; int ao_close(ao_device *device);
|
|
(define-libao ao_close (_fun _libao-pointer -> _int))
|
|
|
|
; void ao_shutdown();
|
|
(define-libao ao_shutdown (_fun -> _int))
|
|
|
|
; int ao_append_option(ao_option **options, const char *key, const char *value);
|
|
(define-libao ao_append_option (_fun _pointer _pointer _pointer -> _int))
|
|
|
|
; int ao_driver_id(char *short_name);
|
|
(define-libao ao_driver_id (_fun _pointer -> _int))
|
|
|
|
|
|
|