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ffmpeg for ios 交叉編譯 (支持i686 armv7 armv7s) 包含lame支持

由于項目還需要mp3 音頻編碼, 所以先需要下載lame源碼搭建交叉環境, 在lame目錄下錄入如下編譯腳本

build.sh

1 #! /bin/sh
2
3
4 SDK_VERSION="6.0"
5
6 rm -rf build
7 mkdir build
8
9 function build_lame()
10 {
11     make distclean
12
13     ./configure \
14         CFLAGS="-isysroot /Applications/Xcode.app/Contents/Developer/Platforms/${SDK}.platform/Developer/SDKs/${SDK}${SDK_VERSION}.sdk" \
15         CC="/Applications/Xcode.app/Contents/Developer/Platforms/${SDK}.platform/Developer/usr/bin/gcc -arch ${PLATFORM}" \
16         --prefix=/Users/khan/Downloads/lame-3.99.5 \
17         --host="arm-apple-darwin9" \
18         --disable-shared \
19         --enable-static \
20         --disable-decoder \
21         --disable-frontend
22
23     make
24     cp "libmp3lame/.libs/libmp3lame.a" "build/libmp3lame-${PLATFORM}.a"
25 }
26
27 PLATFORM="i686"
28 SDK="iPhoneSimulator"
29 build_lame
30
31 #armv6和armv7 比較難共存
32 #PLATFORM="armv6"
33 #SDK="iPhoneOS"
34 #build_lame
35
36 PLATFORM="armv7"
37 SDK="iPhoneOS"
38 build_lame
39
40 PLATFORM="armv7s"
41 SDK="iPhoneOS"
42 build_lame
43
44 lipo -create build/* -output build/libmp3lame.a

首先去https://github.com/yuvi/gas-preprocessor/

下載gas-preprocessor.pl, 然后復制到 /usr/sbin/目錄下(當然, 你可以放在任何目錄下, 只要保證--as='/${path}/gas-preprocessor.pl'路徑正確)

http://ffmpeg.org/download.html 下載ffmpeg源碼, git或者直接下載

終端執行以下指令

#armv7s

./configure --disable-doc --disable-ffmpeg --disable-ffplay --disable-ffserver --enable-pic --enable-cross-compile --enable-decoder=h264 --enable-libmp3lame \

--arch=arm --disable-asm \

--target-os=darwin --cc=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc \

--as='gas-preprocessor.pl /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' \

--sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk \

--cpu=cortex-a8 \

--extra-cflags='-arch armv7s -I/Users/khan/Downloads/lame-3.99.5/include ' \

--extra-ldflags='-arch armv7s -L/Users/khan/Downloads/lame-3.99.5/build -lmp3lame -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk' \

--prefix=/Users/khan/Downloads/ffmpeg/arm7s.lib
make
make install

make clean

#armv7

./configure --disable-doc --disable-ffmpeg --disable-ffplay --disable-ffserver --enable-pic --enable-cross-compile --enable-decoder=h264 --enable-libmp3lame \

--disable-asm --arch=arm \

--target-os=darwin --cc=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc \

--as='gas-preprocessor.pl /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' \

--sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk \

--cpu=cortex-a8 \

--extra-cflags='-arch armv7 -I/Users/khan/Downloads/lame-3.99.5/include ' \

--extra-ldflags='-arch armv7 -L/Users/khan/Downloads/lame-3.99.5/build -lmp3lame -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk' \

--prefix=/Users/khan/Downloads/ffmpeg/arm7.lib
make
make install

make clean

#i686

./configure --disable-doc --disable-ffmpeg --disable-ffplay --disable-ffserver --enable-pic --enable-cross-compile --enable-decoder=h264 --enable-libmp3lame \

--disable-asm --arch=i686 --cpu=i686 --disable-armv5te \

--target-os=darwin --cc=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc \

--as='gas-preprocessor.pl /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc' \

--sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.0.sdk \

--extra-ldflags=-L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.0.sdk/usr/lib/system \

--extra-cflags='-arch i686 -I/Users/khan/Downloads/lame-3.99.5/include ' \

--extra-ldflags='-arch i686 -L/Users/khan/Downloads/lame-3.99.5/build -lmp3lame ' \

--prefix=/Users/khan/Downloads/ffmpeg/i686.lib

make
make install
make clean

--prefix=/Users/khan/Downloads/ffmpeg/i686.lib/里為編譯后的目標文件
然后將各個目錄下的lib lipo一下就可以同時在模擬器和各種該指令集的真機上運行了

lipo -create i686.lib/lib/libavcodec.a arm7.lib/lib/libavcodec.a arm7s.lib/lib/libavcodec.a -output build/libavcodec.a

lipo -create i686.lib/lib/libavdevice.a arm7.lib/lib/libavdevice.a arm7s.lib/lib/libavdevice.a -output build/libavdevice.a

lipo -create i686.lib/lib/libavfilter.a arm7.lib/lib/libavfilter.a arm7s.lib/lib/libavfilter.a -output build/libavfilter.a

lipo -create i686.lib/lib/libavformat.a arm7.lib/lib/libavformat.a arm7s.lib/lib/libavformat.a -output build/libavformat.a

lipo -create i686.lib/lib/libavutil.a arm7.lib/lib/libavutil.a arm7s.lib/lib/libavutil.a -output build/libavutil.a

lipo -create i686.lib/lib/libswresample.a arm7.lib/lib/libswresample.a arm7s.lib/lib/libswresample.a -output build/libswresample.a

lipo -create i686.lib/lib/libswscale.a arm7.lib/lib/libswscale.a arm7s.lib/lib/libswscale.a -output build/libswscale.a

posted on 2012-12-13 16:45 Khan 閱讀(5898) 評論(0) 編輯收藏引用所屬分類: GCC/G++

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ffmpeg for ios 交叉編譯 (支持i686 armv7 armv7s) 包含lame支持

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