Build Opus Audio Codec for iOS

gistfile1.txt

#!/bin/bash

VERSION="1.5.2"
SDKVERSION="17.0"
MINIOSVERSION="10.0"

###########################################################################
#
# Don't change anything under this line!
#
###########################################################################

# by default, we won't build for debugging purposes
if [ "${DEBUG}" == "true" ]; then
    echo "Compiling for debugging ..."
    OPT_CFLAGS="-O0 -fno-inline -g"
    OPT_LDFLAGS=""
    OPT_CONFIG_ARGS="--enable-assertions --disable-asm"
else
    OPT_CFLAGS="-Ofast -flto"
    OPT_LDFLAGS="-flto"
    OPT_CONFIG_ARGS=""
fi

ARCHS="arm64 x86_64"

DEVELOPER=`xcode-select -print-path`
DEVELOPER_SDK=`xcrun --sdk iphoneos --show-sdk-path`
SIMULATOR_SDK=`xcrun --sdk iphonesimulator --show-sdk-path`

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

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

BUILDDIR="${REPOROOT}/build"

# 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 "${SRCDIR}/opus-${VERSION}.tar.gz" ]; then
	echo "Downloading opus-${VERSION}.tar.gz"
	curl -LO http://downloads.xiph.org/releases/opus/opus-${VERSION}.tar.gz
fi
echo "Using opus-${VERSION}.tar.gz"

tar zxf opus-${VERSION}.tar.gz -C $SRCDIR
cd "${SRCDIR}/opus-${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

export ORIGINALPATH=$PATH

for ARCH in ${ARCHS}
do
	if [ "${ARCH}" == "x86_64" ]; then
		PLATFORM="iPhoneSimulator"
		SDK_PATH=$SIMULATOR_SDK
		EXTRA_CONFIG="--host=x86_64-apple-darwin"

	else
		PLATFORM="iPhoneOS"
		SDK_PATH=$DEVELOPER_SDK
		EXTRA_CONFIG="--host=aarch64-apple-darwin"
	fi

	EXTRA_CFLAGS="-arch ${ARCH} -miphoneos-version-min=${MINIOSVERSION}"

	mkdir -p "${INTERDIR}/${PLATFORM}${SDKVERSION}-${ARCH}.sdk"

	./configure --disable-shared --enable-static --with-pic --disable-extra-programs --disable-doc --enable-float-approx ${EXTRA_CONFIG} \
	--prefix="${INTERDIR}/${PLATFORM}${SDKVERSION}-${ARCH}.sdk" \
	LDFLAGS="$LDFLAGS ${OPT_LDFLAGS} -fPIE -L${OUTPUTDIR}/lib -lSystem" \
	CFLAGS="$CFLAGS ${EXTRA_CFLAGS} ${OPT_CFLAGS} -fPIE -I${OUTPUTDIR}/include -isysroot ${SDK_PATH}"

    # Build the application and install it to the fake SDK intermediary dir
    # we have set up. Make sure to clean up afterward because we will re-use
    # this source tree to cross-compile other targets.
	make -j4
	make install
	make clean
done

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

echo "Build library..."

# These are the libs that comprise libopus.
OUTPUT_LIBS="libopus.a"
for OUTPUT_LIB in ${OUTPUT_LIBS}; do
	INPUT_LIBS=""
	for ARCH in ${ARCHS}; do
		if [ "${ARCH}" == "x86_64" ]; then
			PLATFORM="iPhoneSimulator"
		else
			PLATFORM="iPhoneOS"
		fi
		INPUT_ARCH_LIB="${INTERDIR}/${PLATFORM}${SDKVERSION}-${ARCH}.sdk/lib/${OUTPUT_LIB}"
		if [ -e $INPUT_ARCH_LIB ]; then
			INPUT_LIBS="${INPUT_LIBS} ${INPUT_ARCH_LIB}"
		fi
	done
	# Combine the three architectures into a universal library.
	if [ -n "$INPUT_LIBS" ]; then
		lipo -create $INPUT_LIBS \
		-output "${OUTPUTDIR}/lib/${OUTPUT_LIB}"
	else
		echo "$OUTPUT_LIB does not exist, skipping (are the dependencies installed?)"
	fi
done

for ARCH in ${ARCHS}; do
	if [ "${ARCH}" == "x86_64" ]; then
		PLATFORM="iPhoneSimulator"
	else
		PLATFORM="iPhoneOS"
	fi
	cp -R ${INTERDIR}/${PLATFORM}${SDKVERSION}-${ARCH}.sdk/include/* ${OUTPUTDIR}/include/
	if [ $? == "0" ]; then
		# We only need to copy the headers over once. (So break out of forloop
		# once we get first success.)
		break
	fi
done

####################
echo "Building done."
echo "Cleaning up..."
rm -fr ${INTERDIR}
rm -fr "${SRCDIR}/opus-${VERSION}"
rm -rf "${BUILDDIR}"
echo "Done."