#!/bin/sh
#
# ffmpeg configure script (c) 2000, 2001, 2002 Gerard Lantau
#
# set temporary file name
if test ! -z "$TMPDIR" ; then
    TMPDIR1="${TMPDIR}"
elif test ! -z "$TEMPDIR" ; then
    TMPDIR1="${TEMPDIR}"
else
    TMPDIR1="/tmp"
fi

TMPC="${TMPDIR1}/ffmpeg-conf-${RANDOM}-$$-${RANDOM}.c"
TMPO="${TMPDIR1}/ffmpeg-conf-${RANDOM}-$$-${RANDOM}.o"
TMPS="${TMPDIR1}/ffmpeg-conf-${RANDOM}-$$-${RANDOM}.S"
TMPH="${TMPDIR1}/ffmpeg-conf-${RANDOM}-$$-${RANDOM}.h"

# default parameters
prefix="/usr/local"
cross_prefix=""
cc="gcc"
ar="ar"
make="make"
strip="strip"
cpu=`uname -m`
mmx="default"
case "$cpu" in
  i386|i486|i586|i686|i86pc|BePC)
    cpu="x86"
  ;;
  armv4l)
    cpu="armv4l"
  ;;
  alpha)
    cpu="alpha"
  ;;
  *)
    cpu="unknown"
  ;;
esac
gprof="no"
grab="yes"
mp3lame="no"
a52bin="no"
win32="no"
lshared="no"
extralibs="-lm"
simpleidct="yes"
bigendian="no"

# OS specific
targetos=`uname -s`
case $targetos in
BeOS)
prefix="/boot/home/config"
# helps building libavcodec
grab="no"
CFLAGS="-O2 -DPIC"
# no need for libm, but the inet stuff
# Check for BONE
if (echo $BEINCLUDES|grep 'headers/be/bone' >/dev/null); then
extralibs="-lbind -lsocket"
else
echo "Not sure building for net_server will succeed... good luck."
extralibs="-lsocket"
fi ;;
BSD/OS)
grab="no"
extralibs="-lpoll -lgnugetopt -lm"
make="gmake"
;;
*) ;;
esac

# find source path
# XXX: we assume an absolute path is given when launching configure, 
# except in './configure' case.
source_path=${0%configure}
source_path=${source_path%/}
source_path_used="yes"
if test -z "$source_path" -o "$source_path" = "." ; then
    source_path=`pwd`
    source_path_used="no"
fi

for opt do
  case "$opt" in
  --prefix=*) prefix=`echo $opt | cut -d '=' -f 2`
  ;;
  --source-path=*) source_path=`echo $opt | cut -d '=' -f 2`
  ;;
  --cross-prefix=*) cross_prefix=`echo $opt | cut -d '=' -f 2`
  ;;
  --cc=*) cc=`echo $opt | cut -d '=' -f 2`
  ;;
  --make=*) make=`echo $opt | cut -d '=' -f 2`
  ;;
  --extra-cflags=*) CFLAGS="${opt#--extra-cflags=}"
  ;;
  --extra-ldflags=*) LDFLAGS=${opt#--extra-ldflags=}
  ;;
  --extra-libs=*) extralibs=${opt#--extra-libs=}
  ;;
  --cpu=*) cpu=`echo $opt | cut -d '=' -f 2`
  ;;
  --disable-mmx) mmx="no"
  ;;
  --enable-gprof) gprof="yes"
  ;;
  --disable-grab) grab="no"
  ;;
  --enable-a52bin) a52bin="yes" ; extralibs="-ldl $extralibs"
  ;;
  --enable-mp3lame) mp3lame="yes"
  ;;
  --disable-simple_idct) simpleidct="no"
  ;;
  --enable-win32) win32="yes"
  ;;
  --enable-shared) lshared="yes"
  ;;
  esac
done

# compute mmx state
if test $mmx = "default"; then
    if test $cpu = "x86"; then
        mmx="yes"
    else
        mmx="no"
    fi
fi

# Checking for CFLAGS
if test -z "$CFLAGS"; then
    CFLAGS="-O2"
fi

if test "$win32" = "yes" ; then
    cross_prefix="i386-mingw32msvc-"
    grab="no"
fi

# endianness : guess with cpu type. Should also use prefix
if test "$cpu" = "powerpc"; then
    bigendian="yes"
fi

cc="${cross_prefix}${cc}"
ar="${cross_prefix}${ar}"
strip="${cross_prefix}${strip}"

# ---
# check availability of some header files

cat > $TMPC << EOF
#include <malloc.h>
int main( void ) { return 0; }
EOF

_memalign=no
_malloc_h=no
if $cc -o $TMPO $TMPC 2> /dev/null ; then
_malloc_h=yes
_memalign=yes
# check for memalign - atmos
cat > $TMPC << EOF
#include <malloc.h>
int main ( void ) {
char *string = NULL;
string = memalign(64, sizeof(char));
return 0;
}
EOF
$cc -o $TMPO $TMPC 2> /dev/null || _memalign=no
fi

if test "$1" = "-h" -o "$1" = "--help" ; then
cat << EOF

Usage: configure [options]
Options: [defaults in brackets after descriptions]

EOF
echo "Standard options:"
echo "  --help                   print this message"
echo "  --prefix=PREFIX          install in PREFIX [$prefix]"
echo "  --disable-grab           disable audio/video grabbing code"
echo "  --disable-simple_idct    disable simple IDCT routines [default=no]"
echo "  --enable-mp3lame         enable mp3 encoding via libmp3lame [default=no]"
echo "  --enable-win32           enable win32 cross compile"
echo "  --enable-a52bin          open liba52.so.0 at runtime [default=no]"
echo "  --enable-shared          build shared libraries [default=no]"
echo ""
echo "Advanced options (experts only):"
echo "  --source-path=PATH       path of source code [$source_path]"
echo "  --cross-prefix=PREFIX    use PREFIX for compile tools [$cross_prefix]"
echo "  --cc=CC                  use C compiler CC [$cc]"
echo "  --make=MAKE              use specified make [$make]"
echo "  --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]"
echo "  --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]"
echo "  --extra-libs=ELIBS       add ELIBS [$ELIBS]"
echo "  --cpu=CPU                force cpu to CPU  [$cpu]"
echo "  --disable-mmx            disable mmx usage"
echo "  --enable-gprof           enable profiling with gprof [$gprof]"
echo ""
echo "NOTE: The object files are build at the place where configure is launched"
exit 1
fi

echo "Install prefix   $prefix"
echo "Source path      $source_path"
echo "C compiler       $cc"
echo "make             $make"
echo "CPU              $cpu"
echo "Big Endian       $bigendian"
echo "MMX enabled      $mmx"
echo "gprof enabled    $gprof"
echo "grab enabled     $grab"
echo "mp3lame enabled  $mp3lame"
echo "a52 dlopened     $a52bin"

echo "Creating config.mak and config.h"

echo "# Automatically generated by configure - do not modify" > config.mak
echo "/* Automatically generated by configure - do not modify */" > $TMPH

echo "prefix=$prefix" >> config.mak
echo "MAKE=$make" >> config.mak
echo "CC=$cc" >> config.mak
echo "AR=$ar" >> config.mak
echo "STRIP=$strip" >> config.mak
echo "OPTFLAGS=$CFLAGS" >> config.mak
echo "LDFLAGS=$LDFLAGS" >> config.mak
if test "$cpu" = "x86" ; then
  echo "TARGET_ARCH_X86=yes" >> config.mak
  echo "#define ARCH_X86 1" >> $TMPH
elif test "$cpu" = "armv4l" ; then
  echo "TARGET_ARCH_ARMV4L=yes" >> config.mak
  echo "#define ARCH_ARMV4L 1" >> $TMPH
elif test "$cpu" = "alpha" ; then
  echo "TARGET_ARCH_ALPHA=yes" >> config.mak
  echo "#define ARCH_ALPHA 1" >> $TMPH
elif test "$cpu" = "powerpc" ; then
  echo "TARGET_ARCH_POWERPC=yes" >> config.mak
  echo "#define ARCH_POWERPC 1" >> $TMPH
fi
if test "$bigendian" = "yes" ; then
  echo "WORDS_BIGENDIAN=yes" >> config.mak
  echo "#define WORDS_BIGENDIAN 1" >> $TMPH
fi
if test "$mmx" = "yes" ; then
  echo "TARGET_MMX=yes" >> config.mak
  echo "#define HAVE_MMX 1" >> $TMPH
fi
if test "$gprof" = "yes" ; then
  echo "TARGET_GPROF=yes" >> config.mak
  echo "#define HAVE_GPROF 1" >> $TMPH
fi
if test "$lshared" = "yes" ; then
  echo "BUILD_SHARED=yes" >> config.mak
else
  echo "BUILD_SHARED=no" >> config.mak
fi
echo "EXTRALIBS=$extralibs" >> config.mak
echo -n "VERSION=" >>config.mak
head $source_path/VERSION >>config.mak
echo "" >>config.mak
# if you do not want to use encoders, disable that.
echo "#define CONFIG_ENCODERS 1" >> $TMPH
echo "CONFIG_ENCODERS=yes" >> config.mak

# if you do not want to use decoders, disable that.
echo "#define CONFIG_DECODERS 1" >> $TMPH
echo "CONFIG_DECODERS=yes" >> config.mak

# special AC3 stuff in case you already have it
# without libavcodec.
echo "#define CONFIG_AC3 1" >> $TMPH
echo "CONFIG_AC3=yes" >> config.mak

if test "$a52bin" = "yes" ; then
  echo "#define CONFIG_A52BIN 1" >> $TMPH
  echo "CONFIG_A52BIN=yes" >> config.mak
else
  echo "CONFIG_A52BIN=no" >> config.mak
fi

if test "$grab" = "yes" ; then
  echo "#define CONFIG_GRAB 1" >> $TMPH
  echo "CONFIG_GRAB=yes" >> config.mak
fi

if test "$mp3lame" = "yes" ; then
  echo "#define CONFIG_MP3LAME 1" >> $TMPH
  echo "CONFIG_MP3LAME=yes" >> config.mak
fi

if test "$win32" = "yes" ; then
  echo "#define CONFIG_WIN32 1" >> $TMPH
  echo "CONFIG_WIN32=yes" >> config.mak
fi

if test "$_malloc_h" = "yes" ; then
  echo "#define HAVE_MALLOC_H 1" >> $TMPH
else
  echo "#undef  HAVE_MALLOC_H" >> $TMPH
fi

if test "$_memalign" = "yes" ; then
  echo "#define HAVE_MEMALIGN 1" >> $TMPH
else
  echo "#undef  HAVE_MEMALIGN" >> $TMPH
fi

if test "$simpleidct" = "yes" ; then
  echo "#define SIMPLE_IDCT 1" >> $TMPH
fi

# build tree in object directory if source path is different from current one
if test "$source_path_used" = "yes" ; then
    DIRS="libav libavcodec libavcodec/alpha libavcodec/armv4l libavcodec/i386 \
          libavcodec/liba52 libavcodec/mlib tests"
    FILES="Makefile libav/Makefile libavcodec/Makefile tests/Makefile"
    for dir in $DIRS ; do
            mkdir -p $dir
    done
    for f in $FILES ; do
        ln -sf $source_path/$f $f
    done
fi
echo "SRC_PATH=$source_path" >> config.mak

diff $TMPH config.h >/dev/null 2>&1
if test $? -ne 0 ; then
	mv -f $TMPH config.h
else
	echo "config.h is unchanged"
fi

rm -f $TMPO $TMPC $TMPS $TMPH