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-rw-r--r--Makefile.am1
-rw-r--r--chickadee/audio/vorbis.scm304
-rw-r--r--chickadee/config.scm.in2
-rw-r--r--configure.ac10
4 files changed, 317 insertions, 0 deletions
diff --git a/Makefile.am b/Makefile.am
index 765a488..54839f1 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -56,6 +56,7 @@ SOURCES = \
chickadee/math/easings.scm \
chickadee/math/path-finding.scm \
chickadee/audio/openal.scm \
+ chickadee/audio/vorbis.scm \
chickadee/audio/wav.scm \
chickadee/render/color.scm \
chickadee/render/gl.scm \
diff --git a/chickadee/audio/vorbis.scm b/chickadee/audio/vorbis.scm
new file mode 100644
index 0000000..e54e943
--- /dev/null
+++ b/chickadee/audio/vorbis.scm
@@ -0,0 +1,304 @@
+;;; Chickadee Game Toolkit
+;;; Copyright © 2019 David Thompson <davet@gnu.org>
+;;;
+;;; Chickadee is free software: you can redistribute it and/or modify
+;;; it under the terms of the GNU General Public License as published
+;;; by the Free Software Foundation, either version 3 of the License,
+;;; or (at your option) any later version.
+;;;
+;;; Chickadee 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 General Public License
+;;; along with this program. If not, see
+;;; <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+;;
+;; libvorbis bindings.
+;;
+;;; Code:
+
+(define-module (chickadee audio vorbis)
+ #:use-module (chickadee config)
+ #:use-module (ice-9 format)
+ #:use-module (ice-9 match)
+ #:use-module (rnrs bytevectors)
+ #:use-module (srfi srfi-9)
+ #:use-module (srfi srfi-9 gnu)
+ #:use-module (system foreign)
+ #:export (vorbis-open
+ vorbis-clear
+ vorbis-info
+ vorbis-time-total
+ vorbis-time-seek
+ vorbis-read
+ vorbis-fill-buffer
+
+ vorbis-info?
+ vorbis-info-version
+ vorbis-info-channels
+ vorbis-info-sample-rate))
+
+
+;;;
+;;; Low-level Bindings
+;;;
+
+(define vorbis-func
+ (let ((lib (dynamic-link %libvorbisfile)))
+ (lambda (return-type function-name 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 name
+ (vorbis-func return-type func-name arg-types)))
+
+(define ogg-sync-state
+ (list '* ; data
+ int ; storage
+ int ; fill
+ int ; returned
+ int ; unsynced
+ int ; headerbytes
+ int ; bodybytes
+ ))
+
+(define ogg-stream-state
+ (list '* ; body_data
+ long ; body_storage
+ long ; body_fill
+ long ; body_returned
+ '* ; lacing_vals
+ '* ; granule_vals
+ long ; lacing_storage
+ long ; lacing_fill
+ long ; lacing_packet
+ long ; lacing_returned
+ (make-list 282 uint8) ; header
+ int ; header_fill
+ int ; e_o_s
+ int ; b_o_s
+ long ; serialno
+ long ; pageno
+ int64 ; packetno
+ int64 ; granulepos
+ ))
+
+(define oggpack-buffer
+ (list long ; endbyte
+ int ; endbit
+ '* ; buffer
+ '* ; ptr
+ long ; storage
+ ))
+
+(define vorbis-dsp-state
+ (list int ; analysisp
+ '* ; vi
+ '* ; pcm
+ '* ; pcmret
+ int ; pcm_storage
+ int ; pcm_current
+ int ; pcm_returned
+ int ; preextrapolate
+ int ; eofflag
+ long ; lW
+ long ; W
+ long ; nW
+ long ; centerW
+ int64 ; granulepos
+ int64 ; sequence
+ int64 ; glue_bits
+ int64 ; time_bits
+ int64 ; floor_bits
+ int64 ; res_bits
+ '* ; backend_state
+ ))
+
+(define vorbis-block
+ (list '* ; pcm
+ oggpack-buffer ; opb
+ long ; lW
+ long ; W
+ long ; nW
+ int ; pcmend
+ int ; mode
+ int ; eofflag
+ int64 ; granulepos
+ int64 ; sequence
+ '* ; vd
+ '* ; localstore
+ long ; localtop
+ long ; localalloc
+ long ; totaluse
+ '* ; reap
+ long ; glue_bits
+ long ; time_bits
+ long ; floor_bits
+ long ; res_bits
+ '* ; internal
+ ))
+
+(define %vorbis-info
+ (list int ; version
+ int ; channels
+ long ; rate
+ long ; bitrate_upper
+ long ; bitrate_nominal
+ long ; bitrate_lower
+ long ; bitrate_window
+ '* ; codec_setup
+ ))
+
+(define ov-callbacks
+ (list '* ; read_func
+ '* ; seek_func
+ '* ; close_func
+ '* ; tell_func
+ ))
+
+(define ogg-vorbis-file
+ (list '* ; datasource
+ int ; seekable
+ int64 ; offset
+ int64 ; end
+ ogg-sync-state ; oy
+ int ; links
+ '* ; offsets
+ '* ; dataoffsets
+ '* ; serialnos
+ '* ; pcmlengths
+ '* ; vi
+ '* ; vc
+ int64 ; pcm_offset
+ int ; ready_state
+ long ; current_serialno
+ int ; current_link
+ double ; bittrack
+ double ; samptrack
+ ogg-stream-state ; os
+ vorbis-dsp-state ; vd
+ vorbis-block ; vb
+ ov-callbacks ; callbacks
+ ))
+
+(define OV_FALSE -1)
+(define OV_EOF -2)
+(define OV_HOLE -3)
+(define OV_EREAD -128)
+(define OV_EFAULT -129)
+(define OV_EIMPL -130)
+(define OV_EINVAL -131)
+(define OV_ENOTVORBIS -132)
+(define OV_EBADHEADER -133)
+(define OV_EVERSION -134)
+(define OV_ENOTAUDIO -135)
+(define OV_EBADPACKET -136)
+(define OV_EBADLINK -137)
+(define OV_ENOSEEK -138)
+
+(define-foreign ov-fopen
+ int "ov_fopen" '(* *))
+
+(define-foreign ov-open-callbacks
+ int "ov_open_callbacks" (list '* '* '* long '*))
+
+(define-foreign ov-clear
+ int "ov_clear" '(*))
+
+(define-foreign ov-info
+ '* "ov_info" (list '* int))
+
+(define-foreign ov-read
+ long "ov_read" (list '* '* int int int int '*))
+
+(define-foreign ov-comment
+ '* "ov_comment" (list '* int))
+
+(define-foreign ov-raw-seek
+ int "ov_raw_seek" (list '* long))
+
+(define-foreign ov-time-seek
+ int "ov_time_seek" (list '* double))
+
+(define-foreign ov-seekable
+ long "ov_seekable" '(*))
+
+(define-foreign ov-time-total
+ double "ov_time_total" (list '* int))
+
+
+;;;
+;;; High-level public API
+;;;
+
+(define-record-type <vorbis-file>
+ (wrap-vorbis-file bv ptr)
+ vorbis-file?
+ (bv vorbis-file-bv)
+ (ptr unwrap-vorbis-file))
+
+(define (display-vorbis-file vf port)
+ (format port "#<vorbis-file ~x>" (pointer-address (unwrap-vorbis-file vf))))
+
+(set-record-type-printer! <vorbis-file> display-vorbis-file)
+
+(define (vorbis-open file-name)
+ "Open the OGG Vorbis audio file located at FILE-NAME."
+ (let* ((bv (make-bytevector (sizeof ogg-vorbis-file)))
+ (ptr (bytevector->pointer bv)))
+ (ov-fopen (string->pointer file-name) ptr)
+ (wrap-vorbis-file bv ptr)))
+
+(define (vorbis-clear vf)
+ "Clear the buffers of the Vorbis file VF."
+ (ov-clear (unwrap-vorbis-file vf)))
+
+(define-record-type <vorbis-info>
+ (make-vorbis-info version channels sample-rate)
+ vorbis-info?
+ (version vorbis-info-version)
+ (channels vorbis-info-channels)
+ (sample-rate vorbis-info-sample-rate))
+
+(define (vorbis-info vf)
+ (match (parse-c-struct (ov-info (unwrap-vorbis-file vf) -1)
+ %vorbis-info)
+ ((version channels sample-rate _ _ _ _ _)
+ (make-vorbis-info version channels sample-rate))))
+
+(define (vorbis-time-total vf)
+ (ov-time-total (unwrap-vorbis-file vf) -1))
+
+(define (vorbis-time-seek vf t)
+ (ov-time-seek (unwrap-vorbis-file vf) t))
+
+(define* (vorbis-read vf buffer #:optional (start 0))
+ (ov-read (unwrap-vorbis-file vf)
+ (bytevector->pointer buffer start)
+ (- (bytevector-length buffer) start)
+ 0 ; little endian
+ 2 ; 16 bits per sample
+ 1 ; signed data
+ %null-pointer))
+
+(define (vorbis-fill-buffer vf buffer)
+ (let ((capacity (bytevector-length buffer)))
+ (let loop ((size 0))
+ (if (< size capacity)
+ (let ((result (vorbis-read vf buffer size)))
+ (cond
+ ((zero? result)
+ size)
+ ((= result OV_HOLE)
+ (loop size))
+ ((or (= result OV_EBADLINK) (= result OV_EINVAL))
+ -1)
+ (else
+ (loop (+ size result)))))
+ size))))
diff --git a/chickadee/config.scm.in b/chickadee/config.scm.in
index 083d7ba..ab88dbb 100644
--- a/chickadee/config.scm.in
+++ b/chickadee/config.scm.in
@@ -25,6 +25,7 @@
#:export (%datadir
%chickadee-version
%libopenal
+ %libvorbisfile
scope-datadir))
(define %datadir
@@ -33,6 +34,7 @@
(define %chickadee-version "@PACKAGE_VERSION@")
(define %libopenal "@OPENAL_LIBDIR@/libopenal")
+(define %libvorbisfile "@VORBIS_LIBDIR@/libvorbisfile")
(define (scope-datadir file)
"Append the Chickadee data directory to FILE."
(string-append %datadir "/" file))
diff --git a/configure.ac b/configure.ac
index 66be3c0..2bc4ad7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -33,4 +33,14 @@ AS_IF([test "x$OPENAL_LIBDIR" = "x"], [
])
AC_SUBST([OPENAL_LIBDIR])
+PKG_CHECK_MODULES([Vorbis], [vorbis])
+PKG_CHECK_VAR([VORBIS_LIBDIR], [vorbis], [libdir])
+AC_MSG_CHECKING([Vorbis library path])
+AS_IF([test "VORBIS_LIBDIR" = "x"], [
+ AC_MSG_FAILURE([Unable to identify Vorbis lib path.])
+], [
+ AC_MSG_RESULT([$VORBIS_LIBDIR])
+])
+AC_SUBST([VORBIS_LIBDIR])
+
AC_OUTPUT
generated by cgit v1.2.3 (git 2.25.4) at 2024-12-25 19:25:11 +0000