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Thomas Daede
Vorbis tools
Commits
7ef99b09
Commit
7ef99b09
authored
Dec 19, 2001
by
Stan Seibert
Browse files
Finally, we merge my branch onto the head. Duck and cover.
svn path=/trunk/vorbis-tools/; revision=2838
parent
016e0ba3
Changes
34
Expand all
Hide whitespace changes
Inline
Side-by-side
acinclude.m4
View file @
7ef99b09
...
...
@@ -28,7 +28,7 @@ AC_ARG_ENABLE(oggtest, [ --disable-oggtest Do not try to compile and run
OGG_CFLAGS="-I$ogg_includes"
elif test "x$ogg_prefix" != "x" ; then
OGG_CFLAGS="-I$ogg_prefix/include"
elif test "$prefix" != "xNONE"; then
elif test "
x
$prefix" != "xNONE"; then
OGG_CFLAGS="-I$prefix/include"
fi
...
...
@@ -102,68 +102,6 @@ int main ()
rm -f conf.oggtest
])
dnl Shamelessly stolen from Joerg Schilling's star.
dnl Copyright 1998 J. Schilling
dnl Checks if mmap() works to get shared memory
dnl Defines HAVE_SMMAP on success.
AC_DEFUN(AC_FUNC_SMMAP,
[AC_CACHE_CHECK([if mmap works to get shared memory], ac_cv_func_smmap,
[AC_TRY_RUN([
#include <sys/types.h>
#include <sys/mman.h>
char *
mkshare()
{
int size = 8192;
int f;
char *addr;
if ((f = open("/dev/zero", 2)) < 0)
exit(1);
addr = mmap(0, size, PROT_READ|PROT_WRITE, MAP_SHARED, f, 0);
if (addr == (char *)-1)
exit(1);
close(f);
return (addr);
}
main()
{
char *addr;
addr = mkshare(8192);
*addr = 'I';
switch (fork()) {
case -1:
printf("help\n"); exit(1);
case 0: /* child */
*addr = 'N';
_exit(0);
break;
default: /* parent */
wait(0);
sleep(1);
break;
}
if (*addr != 'N')
exit(1);
exit(0);
}
],
[ac_cv_func_smmap=yes],
[ac_cv_func_smmap=no],
[ac_cv_func_smmap=no])])
if test $ac_cv_func_smmap = yes; then
AC_DEFINE(HAVE_SMMAP)
fi])
# Configure paths for libvorbis
# Jack Moffitt <jack@icecast.org> 10-21-2000
# Shamelessly stolen from Owen Taylor and Manish Singh
...
...
@@ -472,3 +410,293 @@ AC_DEFUN([AM_LANGINFO_CODESET],
[Define if you have <langinfo.h> and nl_langinfo(CODESET).])
fi
])
dnl AM_PATH_CURL([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
dnl Test for libcurl, and define CURL_CFLAGS and CURL_LIBS
dnl
AC_DEFUN(AM_PATH_CURL,
[dnl
dnl Get the cflags and libraries
dnl
AC_ARG_WITH(curl,[ --with-curl=PFX Prefix where libcurl is installed (optional)], curl_prefix="$withval", curl_prefix="")
AC_ARG_WITH(curl-libraries,[ --with-curl-libraries=DIR Directory where libcurl library is installed (optional)], curl_libraries="$withval", curl_libraries="")
AC_ARG_WITH(curl-includes,[ --with-curl-includes=DIR Directory where libcurl header files are installed (optional)], curl_includes="$withval", curl_includes="")
AC_ARG_ENABLE(curltest, [ --disable-curltest Do not try to compile and run a test libcurl program],, enable_curltest=yes)
if test "x$curl_libraries" != "x" ; then
CURL_LIBS="-L$curl_libraries"
elif test "x$curl_prefix" != "x" ; then
CURL_LIBS="-L$curl_prefix/lib"
elif test "x$prefix" != "xNONE" ; then
CURL_LIBS="-L$prefix/lib"
fi
CURL_LIBS="$CURL_LIBS -lcurl"
if test "x$curl_includes" != "x" ; then
CURL_CFLAGS="-I$curl_includes"
elif test "x$curl_prefix" != "x" ; then
CURL_CFLAGS="-I$curl_prefix/include"
elif test "x$prefix" != "xNONE"; then
CURL_CFLAGS="-I$prefix/include"
fi
AC_MSG_CHECKING(for libcurl)
no_curl=""
if test "x$enable_curltest" = "xyes" ; then
ac_save_CFLAGS="$CFLAGS"
ac_save_LIBS="$LIBS"
CFLAGS="$CFLAGS $CURL_CFLAGS"
LIBS="$LIBS $CURL_LIBS"
dnl
dnl Now check if the installed libcurl is sufficiently new.
dnl
rm -f conf.curltest
AC_TRY_RUN([
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <curl/curl.h>
int main ()
{
system("touch conf.curltest");
return 0;
}
],, no_curl=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
CFLAGS="$ac_save_CFLAGS"
LIBS="$ac_save_LIBS"
fi
if test "x$no_curl" = "x" ; then
AC_MSG_RESULT(yes)
ifelse([$1], , :, [$1])
else
AC_MSG_RESULT(no)
if test -f conf.curltest ; then
:
else
echo "*** Could not run libcurl test program, checking why..."
CFLAGS="$CFLAGS $CURL_CFLAGS"
LIBS="$LIBS $CURL_LIBS"
AC_TRY_LINK([
#include <stdio.h>
#include <curl/curl.h>
], [ return 0; ],
[ echo "*** The test program compiled, but did not run. This usually means"
echo "*** that the run-time linker is not finding libcurl or finding the wrong"
echo "*** version of libcurl. If it is not finding libcurl, you'll need to set your"
echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
echo "*** to the installed location Also, make sure you have run ldconfig if that"
echo "*** is required on your system"
echo "***"
echo "*** If you have an old version installed, it is best to remove it, although"
echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
[ echo "*** The test program failed to compile or link. See the file config.log for the"
echo "*** exact error that occured. This usually means libcurl was incorrectly installed"
echo "*** or that you have moved libcurl since it was installed." ])
CFLAGS="$ac_save_CFLAGS"
LIBS="$ac_save_LIBS"
fi
CURL_CFLAGS=""
CURL_LIBS=""
ifelse([$2], , :, [$2])
fi
AC_SUBST(CURL_CFLAGS)
AC_SUBST(CURL_LIBS)
rm -f conf.curltest
])
dnl ACX_PTHREAD macro by Steven G. Johnson <stevenj@alum.mit.edu> and
dnl Alejandro Forero Cuervo <bachue@bachue.com>. Found at:
dnl http://www.gnu.org/software/ac-archive/Installed_Packages/acx_pthread.html
AC_DEFUN([ACX_PTHREAD], [
AC_REQUIRE([AC_CANONICAL_HOST])
acx_pthread_ok=no
# First, check if the POSIX threads header, pthread.h, is available.
# If it isn't, don't bother looking for the threads libraries.
AC_CHECK_HEADER(pthread.h, , acx_pthread_ok=noheader)
# We must check for the threads library under a number of different
# names; the ordering is very important because some systems
# (e.g. DEC) have both -lpthread and -lpthreads, where one of the
# libraries is broken (non-POSIX).
# First of all, check if the user has set any of the PTHREAD_LIBS,
# etcetera environment variables, and if threads linking works using
# them:
if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then
save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
save_LIBS="$LIBS"
LIBS="$PTHREAD_LIBS $LIBS"
AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS])
AC_TRY_LINK_FUNC(pthread_join, acx_pthread_ok=yes)
AC_MSG_RESULT($acx_pthread_ok)
if test x"$acx_pthread_ok" = xno; then
PTHREAD_LIBS=""
PTHREAD_CFLAGS=""
fi
LIBS="$save_LIBS"
CFLAGS="$save_CFLAGS"
fi
# Create a list of thread flags to try. Items starting with a "-" are
# C compiler flags, and other items are library names, except for "none"
# which indicates that we try without any flags at all.
acx_pthread_flags="pthreads none -Kthread -kthread lthread pthread -pthread -pthreads -mthreads --thread-safe -mt"
# The ordering *is* (sometimes) important. Some notes on the
# individual items follow:
# pthreads: AIX (must check this before -lpthread)
# none: in case threads are in libc; should be tried before -Kthread and
# other compiler flags to prevent continual compiler warnings
# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
# lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads)
# -pthreads: Solaris/gcc
# -mthreads: Mingw32/gcc, Lynx/gcc
# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
# doesn't hurt to check since this sometimes defines pthreads too;
# also defines -D_REENTRANT)
# pthread: Linux, etcetera
# --thread-safe: KAI C++
case "${host_cpu}-${host_os}" in
*solaris*)
# On Solaris (at least, for some versions), libc contains stubbed
# (non-functional) versions of the pthreads routines, so link-based
# tests will erroneously succeed. (We need to link with -pthread or
# -lpthread.) (The stubs are missing pthread_cleanup_push, or rather
# a function called by this macro, so we could check for that, but
# who knows whether they'll stub that too in a future libc.) So,
# we'll just look for -pthreads and -lpthread first:
acx_pthread_flags="-pthread -pthreads pthread -mt $acx_pthread_flags"
;;
esac
if test x"$acx_pthread_ok" = xno; then
for flag in $acx_pthread_flags; do
case $flag in
none)
AC_MSG_CHECKING([whether pthreads work without any flags])
;;
-*)
AC_MSG_CHECKING([whether pthreads work with $flag])
PTHREAD_CFLAGS="$flag"
;;
*)
AC_MSG_CHECKING([for the pthreads library -l$flag])
PTHREAD_LIBS="-l$flag"
;;
esac
save_LIBS="$LIBS"
save_CFLAGS="$CFLAGS"
LIBS="$PTHREAD_LIBS $LIBS"
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
# Check for various functions. We must include pthread.h,
# since some functions may be macros. (On the Sequent, we
# need a special flag -Kthread to make this header compile.)
# We check for pthread_join because it is in -lpthread on IRIX
# while pthread_create is in libc. We check for pthread_attr_init
# due to DEC craziness with -lpthreads. We check for
# pthread_cleanup_push because it is one of the few pthread
# functions on Solaris that doesn't have a non-functional libc stub.
# We try pthread_create on general principles.
AC_TRY_LINK([#include <pthread.h>],
[pthread_t th; pthread_join(th, 0);
pthread_attr_init(0); pthread_cleanup_push(0, 0);
pthread_create(0,0,0,0);
pthread_cancel(0); pthread_cleanup_pop(0); ],
[acx_pthread_ok=yes])
LIBS="$save_LIBS"
CFLAGS="$save_CFLAGS"
AC_MSG_RESULT($acx_pthread_ok)
if test "x$acx_pthread_ok" = xyes; then
break;
fi
PTHREAD_LIBS=""
PTHREAD_CFLAGS=""
done
fi
# Various other checks:
if test "x$acx_pthread_ok" = xyes; then
save_LIBS="$LIBS"
LIBS="$PTHREAD_LIBS $LIBS"
save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
# Detect AIX lossage: threads are created detached by default
# and the JOINABLE attribute has a nonstandard name (UNDETACHED).
AC_MSG_CHECKING([for joinable pthread attribute])
AC_TRY_LINK([#include <pthread.h>],
[int attr=PTHREAD_CREATE_JOINABLE;],
ok=PTHREAD_CREATE_JOINABLE, ok=unknown)
if test x"$ok" = xunknown; then
AC_TRY_LINK([#include <pthread.h>],
[int attr=PTHREAD_CREATE_UNDETACHED;],
ok=PTHREAD_CREATE_UNDETACHED, ok=unknown)
fi
if test x"$ok" != xPTHREAD_CREATE_JOINABLE; then
AC_DEFINE(PTHREAD_CREATE_JOINABLE, $ok,
[Define to the necessary symbol if this constant
uses a non-standard name on your system.])
fi
AC_MSG_RESULT(${ok})
if test x"$ok" = xunknown; then
AC_MSG_WARN([we do not know how to create joinable pthreads])
fi
AC_MSG_CHECKING([if more special flags are required for pthreads])
flag=no
case "${host_cpu}-${host_os}" in
*-aix* | *-freebsd*) flag="-D_THREAD_SAFE";;
*solaris* | alpha*-osf*) flag="-D_REENTRANT";;
esac
AC_MSG_RESULT(${flag})
if test "x$flag" != xno; then
PTHREAD_CFLAGS="$flag $PTHREAD_CFLAGS"
fi
LIBS="$save_LIBS"
CFLAGS="$save_CFLAGS"
# More AIX lossage: must compile with cc_r
AC_CHECK_PROG(PTHREAD_CC, cc_r, cc_r, ${CC})
else
PTHREAD_CC="$CC"
fi
AC_SUBST(PTHREAD_LIBS)
AC_SUBST(PTHREAD_CFLAGS)
AC_SUBST(PTHREAD_CC)
# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
if test x"$acx_pthread_ok" = xyes; then
ifelse([$1],,AC_DEFINE(HAVE_PTHREAD,1,[Define if you have POSIX threads libraries and header files.]),[$1])
:
else
acx_pthread_ok=no
$2
fi
])
configure.in
View file @
7ef99b09
...
...
@@ -19,12 +19,6 @@ CFLAGS="$cflags_save"
AM_PROG_LIBTOOL
dnl --------------------------------------------------
dnl Additional arguments
dnl --------------------------------------------------
AC_ARG_WITH(ogg, [ --with-ogg=DIR Set where the Ogg library is located])
AC_ARG_WITH(vorbis, [ --with-vorbis=DIR Set where the Vorbis library is located])
dnl --------------------------------------------------
dnl Set build flags based on environment
...
...
@@ -81,18 +75,6 @@ DEBUG="$DEBUG $cflags_save"
PROFILE="$PROFILE $cflags_save"
LDFLAGS="$LDFLAGS $ldflags_save"
dnl --------------------------------------------------
dnl Check for headers
dnl --------------------------------------------------
dnl none
dnl --------------------------------------------------
dnl Check for typedefs, structures, etc
dnl --------------------------------------------------
dnl none
dnl --------------------------------------------------
dnl Check for libraries
dnl --------------------------------------------------
...
...
@@ -100,17 +82,23 @@ dnl --------------------------------------------------
AM_PATH_OGG(,AC_MSG_ERROR(Ogg needed!))
AM_PATH_VORBIS(,AC_MSG_ERROR(Vorbis needed!))
AM_PATH_AO(,AC_MSG_ERROR(libao needed!))
AM_PATH_CURL(,AC_MSG_ERROR(libcurl needed!))
ACX_PTHREAD(,AC_MSG_ERROR(POSIX threads required!))
SOCKET_LIBS=
AC_CHECK_LIB(socket, socket, SOCKET_LIBS="-lsocket")
AC_CHECK_LIB(nsl, gethostbyname, SOCKET_LIBS="-lnsl $SOCKET_LIBS")
SHARE_LIBS='$(top_srcdir)/share/libutf8.a $(top_srcdir)/share/libgetopt.a'
SHARE_CFLAGS='-I$(top_srcdir)/include'
dnl --------------------------------------------------
dnl Check for library functions
dnl --------------------------------------------------
AM_ICONV
AC_
FUNC_SMMAP
AC_
CHECK_FUNCS(atexit on_exit)
AM_LANGINFO_CODESET
dnl --------------------------------------------------
...
...
@@ -131,6 +119,9 @@ dnl --------------------------------------------------
AC_SUBST(DEBUG)
AC_SUBST(PROFILE)
AC_SUBST(SOCKET_LIBS)
AC_SUBST(SHARE_CFLAGS)
AC_SUBST(SHARE_LIBS)
AC_SUBST(CURL_CFLAGS)
AC_SUBST(CURL_LIBS)
AC_OUTPUT(Makefile include/Makefile share/Makefile oggenc/Makefile oggenc/man/Makefile ogg123/Makefile vorbiscomment/Makefile vcut/Makefile ogginfo/Makefile debian/Makefile)
ogg123/Makefile.am
View file @
7ef99b09
...
...
@@ -8,15 +8,20 @@ doc_DATA = ogg123rc-example
mandir
=
@MANDIR@
man_MANS
=
ogg123.1
INCLUDES
=
@OGG_CFLAGS@ @VORBIS_CFLAGS@ @AO_CFLAGS@
INCLUDES
=
@OGG_CFLAGS@ @VORBIS_CFLAGS@ @AO_CFLAGS@ @CURL_CFLAGS@
\
@PTHREAD_CFLAGS@ @SHARE_CFLAGS@
ogg123_LDADD
=
@VORBISFILE_LIBS@ @VORBIS_LIBS@ @OGG_LIBS@ @AO_LIBS@
\
@SOCKET_LIBS@ @SHARE_LIBS@
@SOCKET_LIBS@ @SHARE_LIBS@ @CURL_LIBS@ @PTHREAD_CFLAGS@
\
@PTHREAD_LIBS@
ogg123_DEPENDENCIES
=
@SHARE_LIBS@
ogg123_SOURCES
=
ogg123.c ao_interface.c buffer.c ogg123.h buffer.h
## Comment the above and uncomment the next line to disable the buffer support
##ogg123_SOURCES = ogg123.c ao_interface.c nullbuffer.c ogg123.h buffer.h
ogg123_SOURCES
=
audio.c buffer.c callbacks.c
\
cfgfile_options.c cmdline_options.c
\
file_transport.c format.c http_transport.c
\
ogg123.c oggvorbis_format.c status.c transport.c
\
audio.h buffer.h callbacks.h compat.h
\
cfgfile_options.h cmdline_options.h
\
format.h ogg123.h status.h transport.h
EXTRA_DIST
=
$(man_MANS)
$(doc_DATA)
...
...
ogg123/audio.c
0 → 100644
View file @
7ef99b09
/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
* THE GNU PUBLIC LICENSE 2, WHICH IS INCLUDED WITH THIS SOURCE. *
* PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE Ogg123 SOURCE CODE IS (C) COPYRIGHT 2000-2001 *
* by Kenneth C. Arnold <ogg@arnoldnet.net> AND OTHER CONTRIBUTORS *
* http://www.xiph.org/ *
* *
********************************************************************
last mod: $Id: audio.c,v 1.2 2001/12/19 02:52:53 volsung Exp $
********************************************************************/
#include
<stdio.h>
#include
<string.h>
#include
<limits.h>
#include
"audio.h"
int
audio_format_equal
(
audio_format_t
*
a
,
audio_format_t
*
b
)
{
return
a
->
big_endian
==
b
->
big_endian
&&
a
->
word_size
==
b
->
word_size
&&
a
->
signed_sample
==
b
->
signed_sample
&&
a
->
rate
==
b
->
rate
&&
a
->
channels
==
b
->
channels
;
}
audio_device_t
*
append_audio_device
(
audio_device_t
*
devices_list
,
int
driver_id
,
ao_option
*
options
,
char
*
filename
)
{
audio_device_t
*
head
=
devices_list
;
if
(
devices_list
!=
NULL
)
{
while
(
devices_list
->
next_device
!=
NULL
)
devices_list
=
devices_list
->
next_device
;
devices_list
=
devices_list
->
next_device
=
malloc
(
sizeof
(
audio_device_t
));
}
else
{
head
=
devices_list
=
(
audio_device_t
*
)
malloc
(
sizeof
(
audio_device_t
));
}
devices_list
->
driver_id
=
driver_id
;
devices_list
->
options
=
options
;
devices_list
->
filename
=
filename
;
devices_list
->
device
=
NULL
;
devices_list
->
next_device
=
NULL
;
return
devices_list
;
}
int
audio_devices_write
(
audio_device_t
*
d
,
void
*
ptr
,
int
nbytes
)
{
while
(
d
!=
NULL
)
{
if
(
ao_play
(
d
->
device
,
ptr
,
nbytes
)
==
0
)
return
0
;
/* error occurred */
d
=
d
->
next_device
;
}
return
1
;
}
int
add_ao_option
(
ao_option
**
op_h
,
const
char
*
optstring
)
{
char
*
key
,
*
value
;
int
result
;
key
=
strdup
(
optstring
);
if
(
key
==
NULL
)
return
0
;
value
=
strchr
(
key
,
':'
);
if
(
value
==
NULL
)
{
free
(
key
);
return
0
;
}
/* split by replacing the separator with a null */
*
value
++
=
'\0'
;
result
=
ao_append_option
(
op_h
,
key
,
value
);
free
(
key
);
return
(
result
);
}
void
close_audio_devices
(
audio_device_t
*
devices
)
{
audio_device_t
*
current
=
devices
;
while
(
current
!=
NULL
)
{
if
(
current
->
device
)
ao_close
(
current
->
device
);
current
->
device
=
NULL
;
current
=
current
->
next_device
;
}
}
void
free_audio_devices
(
audio_device_t
*
devices
)
{
audio_device_t
*
current
;
while
(
devices
!=
NULL
)
{
current
=
devices
->
next_device
;
free
(
devices
);
devices
=
current
;
}
}
void
ao_onexit
(
void
*
arg
)
{
audio_device_t
*
devices
=
(
audio_device_t
*
)
arg
;
close_audio_devices
(
devices
);
free_audio_devices
(
devices
);
ao_shutdown
();
}
ogg123/audio.h
0 → 100644
View file @
7ef99b09
/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
* THE GNU PUBLIC LICENSE 2, WHICH IS INCLUDED WITH THIS SOURCE. *
* PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE Ogg123 SOURCE CODE IS (C) COPYRIGHT 2000-2001 *
* by Kenneth C. Arnold <ogg@arnoldnet.net> AND OTHER CONTRIBUTORS *
* http://www.xiph.org/ *
* *
********************************************************************
last mod: $Id: audio.h,v 1.2 2001/12/19 02:52:53 volsung Exp $
********************************************************************/
/* ogg123's audio playback functions */
#ifndef __AUDIO_H__
#define __AUDIO_H__
#include
<ao/ao.h>
typedef
struct
audio_format_t
{
int
big_endian
;
int
word_size
;
int
signed_sample
;
int
rate
;
int
channels
;
}
audio_format_t
;
/* For facilitating output to multiple devices */
typedef
struct
audio_device_t
{
int
driver_id
;
ao_device
*
device
;
ao_option
*
options
;
char
*
filename
;
struct
audio_device_t
*
next_device
;
}
audio_device_t
;
int
audio_format_equal
(
audio_format_t
*
a
,
audio_format_t
*
b
);
audio_device_t
*
append_audio_device
(
audio_device_t
*
devices_list
,
int
driver_id
,
ao_option
*
options
,
char
*
filename
);
void
audio_devices_print_info
(
audio_device_t
*
d
);
int
audio_devices_write
(
audio_device_t
*
d
,
void
*
ptr
,
int
nbytes
);
int
add_ao_option
(
ao_option
**
op_h
,
const
char
*
optstring
);
void
close_audio_devices
(
audio_device_t
*
devices
);
void
free_audio_devices
(
audio_device_t
*
devices
);
void
ao_onexit
(
void
*
arg
);
#endif
/* __AUDIO_H__ */
ogg123/buffer.c