编译opencore-amr for iOS

amr在传声音中应用较多，因为十多Ｋ大小就可以长达一分钟的内容。在ios sdk4.0以后就不再支持这种格式的文件，只有用开源opencore-amr，今天试着编译了一下，结果成功了。

写了一个脚本：

#!/bin/sh

###########################################################################
#  Change values here													  #
#																		  #
VERSION="0.1.2"		  											          #
SDKVERSION="4.2"														  #
#																		  #
###########################################################################
#																		  #
# Don't change anything under this line!								  #
#																		  #
###########################################################################

#opencore-amr-0.1.2

CURRENTPATH=`pwd`

mkdir -p "${CURRENTPATH}/src"
tar zxf opencore-amr-${VERSION}.tar.gz -C "${CURRENTPATH}/src"
cd "${CURRENTPATH}/src/opencore-amr-${VERSION}"

############
# iPhone Simulator
echo "Building opencore-amr for iPhoneSimulator ${SDKVERSION} i386"
echo "Please stand by..."

mkdir -p "${CURRENTPATH}/bin/iPhoneSimulator${SDKVERSION}.sdk"
LOG="${CURRENTPATH}/bin/iPhoneSimulator${SDKVERSION}.sdk/build-openamr-${VERSION}.log"

SDK=/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator${SDKVERSION}.sdk
export CC ="/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc -arch i386"
export CXX="/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/g++ -arch i386"
LDFLAGS="-Wl,-syslibroot,$SDK" 
./configure --disable-shared --prefix="${CURRENTPATH}/bin/iPhoneSimulator${SDKVERSION}.sdk"

make >> "${LOG}" 2>&1
make install >> "${LOG}" 2>&1
make clean >> "${LOG}" 2>&1
#############

#############
# iPhoneOS armv6
echo "Building opencore-amr for iPhoneOS ${SDKVERSION} armv6"
echo "Please stand by..."

mkdir -p "${CURRENTPATH}/bin/iPhoneOS${SDKVERSION}-armv6.sdk"
LOG="${CURRENTPATH}/bin/iPhoneOS${SDKVERSION}-armv6.sdk/build-openamr-${VERSION}.log"

SDK=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS${SDKVERSION}.sdk
export CC ="/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc -arch armv6 --sysroot=$SDK"
export CXX="/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/g++ -arch armv6 --sysroot=$SDK"
LDFLAGS="-Wl,-syslibroot,$SDK"
./configure --host=arm-apple-darwin --target=darwin --prefix="${CURRENTPATH}/bin/iPhoneOS${SDKVERSION}-armv6.sdk" --disable-shared

make >> "${LOG}" 2>&1
make install >> "${LOG}" 2>&1
make clean >> "${LOG}" 2>&1
#############

#############
# iPhoneOS armv7
echo "Building opencore-amr for iPhoneOS ${SDKVERSION} armv7"
echo "Please stand by..."

mkdir -p "${CURRENTPATH}/bin/iPhoneOS${SDKVERSION}-armv7.sdk"
LOG="${CURRENTPATH}/bin/iPhoneOS${SDKVERSION}-armv7.sdk/build-openamr-${VERSION}.log"

SDK=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS${SDKVERSION}.sdk
export CC ="/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc -arch armv7 --sysroot=$SDK"
export CXX="/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/g++ -arch armv7 --sysroot=$SDK"
LDFLAGS="-Wl,-syslibroot,$SDK"
./configure --host=arm-apple-darwin --target=darwin --prefix="${CURRENTPATH}/bin/iPhoneOS${SDKVERSION}-armv7.sdk" --disable-shared 

make >> "${LOG}" 2>&1
make install >> "${LOG}" 2>&1
make clean >> "${LOG}" 2>&1
#############


echo "Build library..."
mkdir -p ${CURRENTPATH}/lib
lipo -create -arch i386 ${CURRENTPATH}/bin/iPhoneSimulator${SDKVERSION}.sdk/lib/libopencore-amrwb.a -arch armv6 ${CURRENTPATH}/bin/iPhoneOS${SDKVERSION}-armv6.sdk/lib/libopencore-amrwb.a -arch armv7 ${CURRENTPATH}/bin/iPhoneOS${SDKVERSION}-armv7.sdk/lib/libopencore-amrwb.a -output ${CURRENTPATH}/lib/libopencore-amrwb.a

lipo -create -arch i386 ${CURRENTPATH}/bin/iPhoneSimulator${SDKVERSION}.sdk/lib/libopencore-amrnb.a -arch armv6 ${CURRENTPATH}/bin/iPhoneOS${SDKVERSION}-armv6.sdk/lib/libopencore-amrnb.a -arch armv7 ${CURRENTPATH}/bin/iPhoneOS${SDKVERSION}-armv7.sdk/lib/libopencore-amrnb.a -output ${CURRENTPATH}/lib/libopencore-amrnb.a


mkdir -p ${CURRENTPATH}/include
cp -R ${CURRENTPATH}/bin/iPhoneSimulator${SDKVERSION}.sdk/include ${CURRENTPATH}/include/
echo "Building done."
echo "Cleaning up..."
rm -rf ${CURRENTPATH}/src
rm -rf ${CURRENTPATH}/bin
echo "Done."

1.将上面脚本内容存入一个.sh文件， 

2. 然后修改为有可运行chmod 777 xxx.sh.  

3. 再将下载下来的opencore-amr.tar.gz与xxx.sh放同一目录，

4. 然后在命令行运行./xxx.sh

这样在目录下就生成一个include与lib文件夹，里面就是你想要的库了。

关于库的使用，我另写了一篇文章介绍，传送门，其过程也遇到了一个小问题，不过最后还是解决了。

这儿有一个demo将amr转成wav

由于xcode4.3以后目录发生了变化，所以上面的script已不正确了。
看到很多人编译都需到问题，我应又花时间研究了一下，其实我也没有在项目中用过，只是兴趣而已。

找了一个新脚本并修改了一下，在xcode4.5.1＋ios6进成功编译。支持i386,armv7,armv7s

#!/bin/sh

set -xe

VERSION="0.1.3"                                                           #
SDKVERSION="6.0"

DEVELOPER=`xcode-select -print-path`
DEST=${HOME}/opencore-amr-iphone

ARCHS="i386 armv7 armv7s"
LIBS="libopencore-amrnb.a libopencore-amrwb.a"

for arch in $ARCHS; do
	case $arch in
	arm*)

        echo "Building opencore-amr for iPhone $arch ****************"
        PLATFORM="iPhoneOS"
        PATH="${DEVELOPER}/Platforms/${PLATFORM}.platform/Developer/usr/bin:$PATH" 
        SDK="${DEVELOPER}/Platforms/${PLATFORM}.platform/Developer/SDKs/${PLATFORM}${SDKVERSION}.sdk"
		CC="gcc -arch $arch --sysroot=$SDK" CXX="g++ -arch $arch --sysroot=$SDK" \
		LDFLAGS="-Wl,-syslibroot,$SDK" ./configure \
		--host=arm-apple-darwin --prefix=$DEST \
		--disable-shared --enable-gcc-armv5
		;;
	*)
        PLATFORM="iPhoneSimulator"
        PATH="${DEVELOPER}/Platforms/${PLATFORM}.platform/Developer/usr/bin:$PATH"
        SDK="${DEVELOPER}/Platforms/${PLATFORM}.platform/Developer/SDKs/${PLATFORM}${SDKVERSION}.sdk"
        echo "Building opencore-amr for iPhoneSimulator $arch*****************"
		CC="gcc -arch $arch" CXX="g++ -arch $arch" \
		./configure \
		--prefix=$DEST \
		--disable-shared
		;;
	esac
	make -j3
	make install
	make clean
	for i in $LIBS; do
		mv $DEST/lib/$i $DEST/lib/$i.$arch
	done
done

for i in $LIBS; do
	input=""
	for arch in $ARCHS; do
		input="$input $DEST/lib/$i.$arch"
	done
	lipo -create -output $DEST/lib/$i $input
done

成生的库与头文件在 ${HOME}目录下

这儿是我编译好的，i386,armv7, armv7s

参考资料：

http://sourceforge.net/mailarchive/forum.php?thread_name=alpine.DEB.2.00.1106152258040.2333%40cone.martin.st&forum_name=opencore-amr-devel

http://sourceforge.net/mailarchive/forum.php?thread_name=alpine.DEB.2.00.1103211053460.3794%40cone.home.martin.st&forum_name=opencore-amr-devel

http://tinsuke.wordpress.com/2011/02/17/how-to-cross-compiling-libraries-for-ios-armv6armv7i386/

http://iosdeveloperzone.com/2012/09/28/tutorial-open-source-on-ios-part-1-build-your-tools/