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#!/bin/bash

###########################################################################
#  Choose your ffmpeg version and your currently-installed iOS SDK version:
#
VERSION="2.0.2"
SDKVERSION="7.0"
ARCHS="armv7 armv7s i386"
#
#
###########################################################################
#
# Don't change anything under this line!
#
###########################################################################

DEVELOPER=`xcode-select -print-path`

cd "`dirname \"$0\"`"
REPOROOT=$(pwd)

# Where we'll end up storing things in the end
OUTPUTDIR="${REPOROOT}/dependencies"
mkdir -p ${OUTPUTDIR}/include
mkdir -p ${OUTPUTDIR}/lib
mkdir -p ${OUTPUTDIR}/bin


BUILDDIR="${REPOROOT}/build"
mkdir -p $BUILDDIR

# where we will keep our sources and build from.
SRCDIR="${BUILDDIR}/src"
mkdir -p $SRCDIR
# where we will store intermediary builds
INTERDIR="${BUILDDIR}/built"
mkdir -p $INTERDIR

########################################

cd $SRCDIR

# Exit the script if an error happens
set -e

if [ ! -e "${SRCDIR}/ffmpeg-${VERSION}.tar.bz2" ]; then
	echo "Downloading ffmpeg-${VERSION}.tar.bz2"
    curl -LO http://ffmpeg.org/releases/ffmpeg-${VERSION}.tar.bz2
else
	echo "Using ffmpeg-${VERSION}.tar.bz2"
fi

tar jxf ffmpeg-${VERSION}.tar.bz2 -C $SRCDIR
cd "${SRCDIR}/ffmpeg-${VERSION}"

set +e # don't bail out of bash script if ccache doesn't exist
CCACHE=`which ccache`
if [ $? == "0" ]; then
    echo "Building with ccache: $CCACHE"
    CCACHE="${CCACHE} "
else
    echo "Building without ccache"
    CCACHE=""
fi
set -e # back to regular "bail out on error" mode

for ARCH in ${ARCHS}
do
	if [ "${ARCH}" == "i386" ];
	then
		PLATFORM="iPhoneSimulator"
        EXTRA_CONFIG="--arch=i386 --disable-asm --enable-cross-compile --target-os=darwin --cpu=i386"
        EXTRA_CFLAGS="-arch i386"
        EXTRA_LDFLAGS="-I${DEVELOPER}/Platforms/${PLATFORM}.platform/Developer/SDKs/${PLATFORM}${SDKVERSION}.sdk/usr/lib -mfpu=neon"
	else
		PLATFORM="iPhoneOS"
        EXTRA_CONFIG="--arch=arm --target-os=darwin --enable-cross-compile --cpu=cortex-a9 --disable-armv5te"
        EXTRA_CFLAGS="-w -arch ${ARCH} -mfpu=neon"
        EXTRA_LDFLAGS="-mfpu=neon"
	fi

	mkdir -p "${INTERDIR}/${ARCH}"

    ./configure --prefix="${INTERDIR}/${ARCH}" --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --disable-iconv --disable-bzlib --enable-avresample --sysroot="${DEVELOPER}/Platforms/${PLATFORM}.platform/Developer/SDKs/${PLATFORM}${SDKVERSION}.sdk" --cc="${DEVELOPER}/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang" --as='/usr/local/bin/gas-preprocessor.pl' --extra-cflags="${EXTRA_CFLAGS} -miphoneos-version-min=${SDKVERSION} -I${OUTPUTDIR}/include" --extra-ldflags="-arch ${ARCH} ${EXTRA_LDFLAGS} -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/${PLATFORM}.platform/Developer/SDKs/${PLATFORM}${SDKVERSION}.sdk -miphoneos-version-min=${SDKVERSION} -L${OUTPUTDIR}/lib" ${EXTRA_CONFIG} --enable-pic --extra-cxxflags="$CPPFLAGS -I${OUTPUTDIR}/include -isysroot ${DEVELOPER}/Platforms/${PLATFORM}.platform/Developer/SDKs/${PLATFORM}${SDKVERSION}.sdk"

    make && make install && make clean
	 
done

mkdir -p "${INTERDIR}/universal/lib"

cd "${INTERDIR}/armv7/lib"
for file in *.a
do

cd ${INTERDIR}
xcrun -sdk iphoneos lipo -output universal/lib/$file  -create -arch armv7 armv7/lib/$file -arch armv7s armv7s/lib/$file -arch i386 i386/lib/$file
echo "Universal $file created."

done
cp -r ${INTERDIR}/armv7/include ${INTERDIR}/universal/

echo "Done."