#!/bin/bash

show_help()
{
	cat << EOF
Non-autotool config script for MLT.

Help options:

  --help                  - this information

General build options:

  --prefix=directory      - install prefix for path (default: $prefix)
  --libdir=directory      - lib directory (default: $prefix/lib)
  --enable-gpl            - Enable GPL components
  --enable-motion-est	  - Enable motion estimation components
  --disable-debug         - Compile without debug support (default: on)
  --disable-mmx           - Compile without MMX support (default: on)
  --cpu='cpu'             - Compile for a specific CPU/architectre (default: none)

Module disables options:

EOF

	for i in src/modules/*
	do
		[ -d $i ] && [ "`basename $i`" != "CVS" ] && echo `basename $i` `[ -f $i/gpl ] && echo [GPL]`
	done |
	awk '{ printf( "  --disable-%-14.14s- Disable the %s module %s\n", $1, $1, $2 ); }'

	echo
	echo "  NOTE: libraries marked [GPL] will not be built unless --enable-gpl is stipulated."
	echo
}

build_config()
{
	(
		echo "version=$version"
		echo "prefix=$prefix"
		echo "libdir=$libdir"
		echo "bindir=$prefix/bin"
		echo "targetos=$targetos"

		[ "$mmx" = "true" ] && 
		echo "MMX_FLAGS=-DUSE_MMX"

		[ "$debug" = "true" ] && 
		echo "DEBUG_FLAGS=-g"

		echo "LARGE_FILE=-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE"

		[ "$cpu" != "" ] &&
		echo "TARGETARCH=-march=$cpu" &&
		echo "TARGETCPU=-mcpu=$cpu"
		echo "OPTIMISATIONS=-O4 -pipe -fomit-frame-pointer"

		echo "CFLAGS+=-Wall -fPIC -DPIC \$(TARGETARCH) \$(TARGETCPU) \$(OPTIMISATIONS) \$(MMX_FLAGS) \$(DEBUG_FLAGS) \$(LARGE_FILE)"

		case $targetos in
		Darwin)
		echo "CFLAGS+=-D__DARWIN__ `sdl-config --cflags`"
		echo "SHFLAGS=-dynamiclib"
		echo "LDFLAGS+=`sdl-config --libs`"
		;;
		Linux)
		echo "OPTIMISATIONS+=-ffast-math"
		echo "CFLAGS+=-pthread"
		echo "SHFLAGS=-shared"
		echo "LIBDL=-ldl"
		echo "RDYNAMIC=-rdynamic"
		;;
		*)
		;;
		esac
		echo "LIBSUF=$LIBSUF"
	) > config.mak

	echo "#!/bin/sh" > mlt-config
	(
		echo export version=$version
		echo export prefix=$prefix
		echo export libdir=$libdir
		echo export bindir=$prefix/bin
	) >> mlt-config

	cat < mlt-config-template >> mlt-config

	echo -n > packages.dat
}

build_pkgconfig()
{
	for i in framework valerie miracle
	do
		echo prefix="$prefix" > mlt-$i.pc
		(
			echo exec_prefix=$prefix
			echo libdir=$libdir
			echo includedir=$prefix/include
			echo version=$version
			echo cflags=`grep ^$i packages.dat | cut -f 2`
			echo libs=`grep ^$i packages.dat | cut -f 3`
		) >> mlt-$i.pc
		cat mlt-$i.pc.in >>mlt-$i.pc
	done
}

# Debug mode
set +x

# Define build directory for scripts called
export build_dir=`dirname $0`
export prefix=/usr/local
export libdir=""
export help=0
export version=0.2.5
export debug=true
export mmx=true
export gpl=false
export cpu=
export motionest=false

# Determine OS
targetos=$(uname -s)
# Chose appropriate suffix for libraries
case $targetos in
	Darwin)
	LIBSUF=".dylib"
	mmx=false
	;;
	Linux)
	LIBSUF=".so"
	;;
	*)
	LIBSUF=".so"
	;;
esac
export LIBSUF

# Iterate through arguments
for i in "$@"
do
	case $i in
		--help )			help=1 ;;
		--prefix=* )		prefix="${i#--prefix=}" ;;
		--libdir=* )		libdir="${i#--libdir=}" ;;
		--disable-debug )	debug=false ;;
		--disable-mmx )		mmx=false ;;
		--enable-gpl )		gpl=true ;;
		--enable-motion-est )	motionest=true ;;
		--cpu=* )			cpu="${i#--cpu=}" ;;
	esac
done

# Determine the libdir if it's not specified in the args
[ "$libdir" = "" ] && libdir=$prefix/lib

# Double check mmx (may end up disabling mmx on non-linux platforms incorrectly)
if [ "$mmx" = "true" ]
then
	grep mmx /proc/cpuinfo > /dev/null 2>&1 || mmx=false
fi

# Show help if requested
if [ $help = 1 ]
then
	show_help
else
	# Log the configuration history
	date >> config.log
	echo "$0 $@" >> config.log

	build_config
fi

# Iterate through each of the components
for i in framework modules inigo valerie miracle humperdink
do
	if [ -x src/$i/configure ]
	then
		[ $help = 0 ] && echo "Configuring `basename $i`:"
		olddir=`pwd`
		cd src/$i
		./configure "$@"
		[ $? != 0 ] && exit 1
		cd $olddir
	fi
done

# Build the pkg-config files
build_pkgconfig

# Report GPL Usage
[ $help != 1 ] && 
( [ "$gpl" = "false" ] && 
echo "GPL Components are disabled" || 
echo "GPL License Used" )

if [ "$motionest" = "true" -a "$gpl" = "false" ]
then
	echo "Add the --enable-gpl flag to build the motion estimation components."
fi