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dnl
dnl autoconf script for searching and checking ffmpeg
dnl
dnl written by Frantisek Dvorak <valtri@users.sourceforge.net>
dnl
dnl
dnl AM_PATH_FFMPEG([ACTION IF FOUND [, ACTION IF NOT FOUND]]))
dnl
dnl It looks for ffmpeg, defines FFMPEG_CFLAGS and FFMPEG_LIBS.
dnl
AC_DEFUN([AM_PATH_FFMPEG], [
dnl get the prefix, if specified
if test x"$external_ffmpeg" != "xyes" -a x"$external_ffmpeg" != "xno"; then
ffmpeg_prefix="$withval"
fi
dnl disable test if requested
AC_ARG_ENABLE(ffmpegtest,
AC_HELP_STRING([--disable-ffmpegtest],
[Do not try compile and run a test ffmpeg program. It will need specify custom FFMPEG_CFLAGS and FFMPEG_LIBS environment variables.]
),
enable_ffmpegtest="$enableval",
enable_ffmpegtest=yes
)
if test x"$enable_ffmpegtest" = "xyes"; then
ac_save_LDFLAGS="${LDFLAGS}"
ac_save_CPPFLAGS="${CPPFLAGS}"
external_ffmpeg_found=no
dnl look for the ffmpeg or just check specified flags
if test x"$FFMPEG_CFLAGS" = x -a x"$FFMPEG_LIBS" = x; then
dnl look for ffmpeg
if test x"$ffmpeg_prefix" = x; then
prefixes="$ffmpeg_prefix /usr /usr/local /opt"
else
prefixes="$ffmpeg_prefix"
fi
for dir in $prefixes; do
FFMPEG_CFLAGS="-I${dir}/include/ffmpeg -I${dir}/include/postproc"
FFMPEG_LIBS="-L${dir}/lib"
CPPFLAGS="${ac_save_CFLAGS} ${FFMPEG_CFLAGS}"
LDFLAGS="${ac_save_LDFLAGS} ${FFMPEG_LIBS}"
dnl drop the cache
for i in "ac_cv_header_avcodec_h" "ac_cv_header_postprocess_h" \
"ac_cv_lib_avcodec_pp_get_context" \
"ac_cv_lib_postproc_pp_get_context" \
"ac_cv_lib_avcodec_register_avcodec"; do
$as_unset $i || test "${$i+set}" != set || { $i=; export $i; }
done
dnl check the headers
AC_CHECK_HEADERS(avcodec.h postprocess.h,
[dnl look for libpostproc inside libavcodec
AC_CHECK_LIB(avcodec, pp_get_context,
[external_ffmpeg_found=yes
FFMPEG_LIBS="${FFMPEG_LIBS} -lavcodec"
break],
[dnl look for shared libpostproc and avcodec
AC_CHECK_LIB(postproc, pp_get_context,
[AC_CHECK_LIB(avcodec, register_avcodec,
[external_ffmpeg_found=yes
FFMPEG_LIBS="${FFMPEG_LIBS} -lavcodec -lpostproc"
break],
[continue],
[-lavcodec]
)],
[continue]
)],
[]
)],
[continue]
)
done
dnl result of autodetection
if test x"$external_ffmpeg_found" = "xyes"; then
AC_MSG_RESULT([External ffmpeg library was found in ${dir}])
else
AC_MSG_ERROR([External ffmpeg library not found.
*********************************************************************
You can try to specify prefix of ffmpeg library by the option
--with-external-ffmpeg=prefix, or to specify custom FFMPEG_CFLAGS and
FFMPEG_LIBS.
If you would like to use the internal ffmpeg, please remove the configure
option --with-external-ffmpeg.
*********************************************************************])
fi
else
dnl check specified flags
CPPFLAGS="${ac_save_CFLAGS} ${FFMPEG_CFLAGS}"
LDFLAGS="${ac_save_LDFLAGS} ${FFMPEG_LIBS}"
AC_LINK_IFELSE([#include <avcodec.h>
#include <postprocess.h>
int main() {
register_avcodec((void *)0);
pp_get_context(0, 0, 0);
}
],
[external_ffmpeg_found=yes],
[external_ffmpeg_found=no],
)
dnl result
if test x"$external_ffmpeg_found" = "xyes"; then
AC_MSG_RESULT([Using custom FFMPEG_CFLAGS and FFMPEG_LIBS for external ffmpeg])
else
AC_MSG_ERROR([External ffmpeg library not found with specified options.
*********************************************************************
You can try to specify prefix of ffmpeg library by the option
--with-external-ffmpeg=prefix, or to specify different FFMPEG_CFLAGS and
FFMPEG_LIBS.
If you would like to use the internal ffmpeg, please remove the configure
option --with-external-ffmpeg.
*********************************************************************])
fi
fi
CPPFLAGS="${ac_save_CPPFLAGS}"
LDFLAGS="${ac_save_LDFLAGS}"
else
if test x"${FFMPEG_CFLAGS}" = "x" -a x"${FFMPEG_LIBS}" = "x"; then
external_ffmpeg_found=no
AC_MSG_ERROR([You should specify FFMPEG_CFLAGS and FFMPEG_LIBS])
else
external_ffmpeg_found=yes
AC_MSG_RESULT([Forced using custom FFMPEG_CFLAGS and FFMPEG_LIBS.])
fi
fi
dnl result
if test x"$external_ffmpeg_found" = "xyes"; then
ifelse([$1], , :, [$1])
else
ifelse([$2], , :, [$2])
fi
AC_SUBST(FFMPEG_CFLAGS)
AC_SUBST(FFMPEG_LIBS)
])
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