mac 下移植 ffmpeg 支持x264 faac lame png 开启asm neon 加速

mac 下移植 ffmpeg 支持x264 faac lame png 开启asm neon 加速 

1. 获取 ffmpeg 源码
http://ffmpeg.org/releases/ffmpeg-2.8.11.tar.bz2

2.再ffmpeg-2.8.11 平级目录下创建build-ffmpeg.sh
touch build-ffmpeg.sh

3.设置权限
sudo chmod 777 build-ffmpeg.sh

4. 编辑 build-ffmpeg.sh

#!/bin/sh

# directories
SOURCE="ffmpeg-2.8.11"
FAT="FFmpeg-iOS"

SCRATCH="scratch"
# must be an absolute path
THIN=`pwd`/"thin"

# absolute path to x264 library
X264=`pwd`/fat-x264
#LIBPNG=`pwd`/libpng
FDK_AAC=`pwd`/fdk-aac/fdk-aac-ios

CONFIGURE_FLAGS="--enable-cross-compile --disable-debug --disable-programs \
--disable-doc --enable-pic"

if [ "$X264" ]
then
CONFIGURE_FLAGS="$CONFIGURE_FLAGS --enable-gpl --enable-yasm --enable-asm --enable-libx264 --enable-decoder=h264 --enable-pthreads"
fi

if [ "$FDK_AAC" ]
then
CONFIGURE_FLAGS="$CONFIGURE_FLAGS --enable-libmp3lame --enable-nonfree --enable-libfaac"
fi

# avresample
CONFIGURE_FLAGS="$CONFIGURE_FLAGS --enable-avresample"

ARCHS="arm64 armv7 armv7s x86_64 i386"

COMPILE="y"
LIPO="y"

DEPLOYMENT_TARGET="6.0"

if [ "$*" ]
then
if [ "$*" = "lipo" ]
then
# skip compile
COMPILE=
else
ARCHS="$*"
if [ $# -eq 1 ]
then
# skip lipo
LIPO=
fi
fi
fi

if [ "$COMPILE" ]
then
if [ ! `which yasm` ]
then
echo 'Yasm not found'
if [ ! `which brew` ]
then
echo 'Homebrew not found. Trying to install...'
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" \
|| exit 1
fi
echo 'Trying to install Yasm...'
brew install yasm || exit 1
fi
if [ ! `which gas-preprocessor.pl` ]
then
echo 'gas-preprocessor.pl not found. Trying to install...'
(curl -L https://github.com/libav/gas-preprocessor/raw/master/gas-preprocessor.pl \
-o /usr/local/bin/gas-preprocessor.pl \
&& chmod +x /usr/local/bin/gas-preprocessor.pl) \
|| exit 1
fi

if [ ! -r $SOURCE ]
then
echo 'FFmpeg source not found. Trying to download...'
curl http://www.ffmpeg.org/releases/$SOURCE.tar.bz2 | tar xj \
|| exit 1
fi
TEMP_CONFIGUR="$CONFIGURE_FLAGS"
CWD=`pwd`
for ARCH in $ARCHS
do
echo "building $ARCH..."
mkdir -p "$SCRATCH/$ARCH"
cd "$SCRATCH/$ARCH"
CONFIGURE_FLAGS="$TEMP_CONFIGUR"
echo "$CONFIGURE_FLAGS"
CFLAGS="-arch $ARCH"
if [ "$ARCH" = "i386" -o "$ARCH" = "x86_64" ]
then
PLATFORM="iPhoneSimulator"
CFLAGS="$CFLAGS -mios-simulator-version-min=$DEPLOYMENT_TARGET"
else
PLATFORM="iPhoneOS"
CFLAGS="$CFLAGS -mios-version-min=$DEPLOYMENT_TARGET"

if [ "$ARCH" = "armv7" ]
then
CFLAGS="$CFLAGS -mfpu=neon -mfloat-abi=softfp "
CONFIGURE_FLAGS="$CONFIGURE_FLAGS  --enable-neon --cpu=cortex-a8 --enable-optimizations --disable-ffmpeg --disable-ffplay --disable-ffserver --disable-doc"
fi
if [ "$ARCH" = "armv7s" ]
then
CFLAGS="$CFLAGS -mfpu=neon -mfloat-abi=softfp "
CONFIGURE_FLAGS="$CONFIGURE_FLAGS  --enable-neon --cpu=cortex-a8 --enable-optimizations --disable-ffmpeg --disable-ffplay --disable-ffserver --disable-doc"
fi

if [ "$ARCH" = "arm64" ]
then
CFLAGS="$CFLAGS -mfpu=neon -mfloat-abi=softfp "
CONFIGURE_FLAGS="$CONFIGURE_FLAGS  --enable-neon --enable-optimizations --disable-ffmpeg --disable-ffplay --disable-ffserver --disable-doc"
EXPORT="GASPP_FIX_XCODE5=1"
fi
fi

XCRUN_SDK=`echo $PLATFORM | tr '[:upper:]' '[:lower:]'`
CC="xcrun -sdk $XCRUN_SDK clang"
CXXFLAGS="$CFLAGS"
LDFLAGS="$CFLAGS"
if [ "$X264" ]
then
CFLAGS="$CFLAGS -I$X264/include"
LDFLAGS="$LDFLAGS -L$X264/lib"
fi
if [ "$FDK_AAC" ]
then
CFLAGS="$CFLAGS -I$FDK_AAC/include"
LDFLAGS="$LDFLAGS -L$FDK_AAC/lib"
fi
if [ "$LIBPNG" ]
then
CFLAGS="$CFLAGS -I$LIBPNG/include"
LDFLAGS="$LDFLAGS -L$LIBPNG/lib"
fi

TMPDIR=${TMPDIR/%\/} $CWD/$SOURCE/configure \
--target-os=darwin \
--arch=$ARCH \
--cc="$CC" \
$CONFIGURE_FLAGS \
--extra-cflags="$CFLAGS" \
--extra-cxxflags="$CXXFLAGS" \
--extra-ldflags="$LDFLAGS" \
--prefix="$THIN/$ARCH" \
|| exit 1
make clean
make -j3 install $EXPORT || exit 1
cd $CWD
done
fi

if [ "$LIPO" ]
then
echo "building fat binaries..."
mkdir -p $FAT/lib
set - $ARCHS
CWD=`pwd`
cd $THIN/$1/lib
for LIB in *.a
do
cd $CWD
echo lipo -create `find $THIN -name $LIB` -output $FAT/lib/$LIB 1>&2
lipo -create `find $THIN -name $LIB` -output $FAT/lib/$LIB || exit 1
done

cd $CWD
cp -rf $THIN/$1/include $FAT
fi

echo Done

5. 执行之前请把之前交叉编译好的库放到平级目下，否则会报找不到库的错误
sudo ./build-ffmpeg.sh

6. 最终会在FFmpeg-iOS 文件夹下生成对应的打包的库
github地址：https://github.com/a553110519/ffmpeg-ios.git