android编译ffmpeg+x264+faac

1. 在x264的源码目录下创建b1.sh,内容如下：

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 export NDK=/opt/google/android/android-ndk-r8e
 export VERSION=4.4.3
 export PREBUILT=$NDK/toolchains/arm-linux-androideabi-$VERSION/prebuilt
 export PLATFORM=$NDK/platforms/android-8/arch-arm
 ./configure --enable-static \
 --enable-shared \
 --enable-pic \
 --disable-asm \
 --disable-cli \
 --host=arm-linux \
 --cross-prefix=$PREBUILT/linux-x86_64/bin/arm-linux-androideabi- \
 --sysroot=$PLATFORM

2. 在ffmepg的父目录下创建b1.sh,内容如下：并创建目录elib，并 把上面生成的lib264.a 拷贝到该目录下

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 #!/bin/bash
 export VERSION=4.4.3
 export NDK=/opt/google/android/android-ndk-r8e
 export PREBUILT=$NDK/toolchains/arm-linux-androideabi-$VERSION/prebuilt/linux-x86_64
 export PLATFORM=$NDK/platforms/android-9/arch-arm
 export FFMPEG_ROOT=/home/test/code/ffmpeg-1.1.5
 export X264_ROOT=/home/test/code/x264_and #上面的x264的源码目录
 export ELIB="$FFMPEG_ROOT/elib"
 function build_one
 {
 $FFMPEG_ROOT/configure --target-os=linux \
 --enable-cross-compile \
 --enable-runtime-cpudetect \
 --disable-asm \
 --arch=arm \
 --cc=$PREBUILT/bin/arm-linux-androideabi-gcc \
 --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \
 --disable-stripping \
 --nm=$PREBUILT/bin/arm-linux-androideabi-nm \
 --sysroot=$PLATFORM \
 --enable-nonfree \
 --enable-version3 \
 --disable-everything \
 --enable-gpl \
 --disable-doc \
 --enable-avresample \
 --enable-demuxer=rtsp \
 --enable-muxer=rtsp \
 --disable-ffplay \
 --disable-ffserver \
 --enable-ffmpeg \
 --disable-ffprobe \
 --enable-libx264 \
 --enable-encoder=libx264 \
 --enable-decoder=h264 \
 --enable-protocol=rtp \
 --enable-hwaccels \
 --enable-zlib \
 --disable-devices \
 --disable-avdevice \
 --extra-cflags="-I$X264_ROOT -fPIC -DANDROID -D__thumb__ -mthumb -Wfatal-errors -Wno-deprecated -mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=armv7-a" \
 --extra-ldflags="-L$ELIB"
 make -j4
 }
 build_one
 $PREBUILT/bin/arm-linux-androideabi-ar d libavcodec/libavcodec.a inverse.o
 $PREBUILT/bin/arm-linux-androideabi-ld -rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -L$ELIB -soname libffmpeg.so -shared -nostdlib -z noexecstack -Bsymbolic --whole-archive --no-undefined -o libffmpeg.so libavcodec/libavcodec.a libavfilter/libavfilter.a libavresample/libavresample.a libavformat/libavformat.a libavutil/libavutil.a libswscale/libswscale.a -lc -lm -lz -ldl -llog -lx264 --warn-once --dynamic-linker=/system/bin/linker $PREBUILT/lib/gcc/arm-linux-androideabi/$VERSION/libgcc.a

到此为止so文件已经编译完毕：
下面编译jni的so文件；

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 LOCAL_PATH := $(call my-dir)

 include $(CLEAR_VARS)
 MY_PATH := /home/wanjm/code/binary #上面的so文件的目录
 LOCAL_MODULE := ffmpeg
 LOCAL_SRC_FILES := $(MY_PATH)/libffmpeg.so #仅支持一个文件；
 include $(PREBUILT_SHARED_LIBRARY)


 include $(CLEAR_VARS)
 LOCAL_MODULE := myffmp
 LOCAL_SRC_FILES := VideoEncoder.c #jni的c文件；
 LOCAL_C_INCLUDES := /home/wanjm/code/ffmpeg-1.2.4
 LOCAL_LDLIBS := -llog -lm -lc -ldl -lz -lstdc++
 LOCAL_STATIC_LIBRARIES := libffmpeg #引用5处生成的so文件；
 include $(BUILD_SHARED_LIBRARY)

上面so方式弄出来的，还是两个文件，在实际的java中，要限价在libffmpeg.so,然后在加载myffmp; 反序后会报告少依赖包, 但是按照该顺序还是加载失败;

然后按照下面的写法,可以生成单个so文件,且可以调试;

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 LOCAL_PATH := $(call my-dir)
 MY_PATH :=/home/wanjm/code/binary/elib

 include $(CLEAR_VARS)
 #MY_PATH := /home/wanjm/code/binary
 #LOCAL_MODULE := ffmpeg
 #LOCAL_SRC_FILES := $(MY_PATH)/libffmpeg.so
 #include $(PREBUILT_SHARED_LIBRARY)

 include $(CLEAR_VARS)
 LOCAL_MODULE := avcodec
 LOCAL_SRC_FILES := $(MY_PATH)/libavcodec.a
 include $(PREBUILT_STATIC_LIBRARY)

 include $(CLEAR_VARS)
 LOCAL_MODULE := avformat
 LOCAL_SRC_FILES := $(MY_PATH)/libavformat.a
 include $(PREBUILT_STATIC_LIBRARY)

 include $(CLEAR_VARS)
 LOCAL_MODULE := avutil
 LOCAL_SRC_FILES := $(MY_PATH)/libavutil.a
 include $(PREBUILT_STATIC_LIBRARY)

 include $(CLEAR_VARS)
 LOCAL_MODULE := x264
 LOCAL_SRC_FILES := $(MY_PATH)/libx264.a
 include $(PREBUILT_STATIC_LIBRARY)

 include $(CLEAR_VARS)
 LOCAL_MODULE := swscale
 LOCAL_SRC_FILES := $(MY_PATH)/libswscale.a
 include $(PREBUILT_STATIC_LIBRARY)


 include $(CLEAR_VARS)
 LOCAL_MODULE := myffmp
 LOCAL_SRC_FILES := VideoEncoder.c
 LOCAL_C_INCLUDES := /home/wanjm/code/ffmpeg-1.2.4
 LOCAL_LDLIBS := -llog -lm -lc -ldl -lz -lstdc++
 LOCAL_STATIC_LIBRARIES := libavformat libavutil libavcodec libswscale libavutil libx264
 include $(BUILD_SHARED_LIBRARY)

makefile 脚本： 注意-lgcc 应该放在最后，否则找到__aeabi_idiv等方法；

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 VERSION=4.8
 NDK_ROOT=/opt/google/android-ndk-r9b
 TOOLCHAINS_ROOT=$(NDK_ROOT)/toolchains/arm-linux-androideabi-$(VERSION)/prebuilt/linux-x86_64
 TOOLCHAINS_PREFIX=$(TOOLCHAINS_ROOT)/bin/arm-linux-androideabi
 TOOLCHAINS_INCLUDE=$(TOOLCHAINS_ROOT)/lib/gcc/arm-linux-androideabi/$(VERSION)/include-fixed
 SYSROOT=$(NDK_ROOT)/platforms/android-9/arch-arm
 PLATFORM_INCLUDE=$(SYSROOT)/usr/include
 PLATFORM_LIB=$(SYSROOT)/usr/lib
 FLAGS= -fpic -DANDROID
 #如果没有-lc，实际运行时会找不到gettimeofday；
 LDFLAGS=-shared -L$(PLATFORM_LIB) --no-undefined -lc -llog -lm -lc -ldl -lz #-nostdlib -ldl -lm -Bdynamic -lc -lstdc++
 #FLAGS="-I$(TOOLCHAINS_INCLUDE) -I$(PLATFORM_INCLUDE) " #-L$(PLATFORM_LIB) -nostdlib -lgcc -Bdynamic -lc"
 CC=$(TOOLCHAINS_PREFIX)-gcc --sysroot=$(SYSROOT)
 LD=$(TOOLCHAINS_PREFIX)-ld
 libtime.so: main.o
 $(LD) $(LDFLAGS) main.o -o libtime.so -L/home/wanjm/code/binary/elib -lavformat -lavutil -lavcodec -lswscale -lavutil -lx264 -L$(TOOLCHAINS_ROOT)/lib/gcc/arm-linux-androideabi/$(VERSION) -lgcc
 cp libtime.so ../libs/armeabi
 main.o: VideoEncoder.c
 $(CC) -c VideoEncoder.c -o main.o -I/home/wanjm/code/ffmpeg-1.2.4
 clean:
 rm -rf libtime.so
 rm main.o

一步到位的ffmpeg+x264 for android 的编译；
1. 建立目录android，其下放置解压的ffmpeg和x264源码目录；建立install 目录，和make目录；
2. 在make中创建build.sh; 注意此处用的是相对目录，所以只能在make目录下运行；

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 #!/bin/bash
 export VERSION=4.6
 export NDK=/opt/google/android-ndk-r9b
 export PREBUILT=$NDK/toolchains/arm-linux-androideabi-$VERSION/prebuilt/linux-x86_64
 export PLATFORM=$NDK/platforms/android-9/arch-arm
 export FFMPEG_ROOT=../ffmpeg-1.2.4
 export X264_ROOT=../x264 #上面的x264的源码目录
 export PREFIX=../install
 export ELIB="$PREFIX/lib"
 export FAAC_ROOT=../faac-1.28
 function build_x264
 {
 cd $X264_ROOT
 pwd
 ./configure --enable-static \
 --prefix=$PREFIX \
 --enable-shared \
 --enable-pic \
 --disable-asm \
 --disable-cli \
 --host=arm-linux \
 --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \
 --sysroot=$PLATFORM
 make
 cp libx264.a $ELIB
 cd -
 }
 function build_faac
 {
 cd $FAAC_ROOT
 pwd
 CFLAGS="-fpic -DANDROID -fpic -mthumb-interwork -ffunction-sections -funwind-tables -fstack-protector -fno-short-enums -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -Wno-psabi -march=armv5te -mtune=xscale -msoft-float -mthumb -Os -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 -DANDROID -Wa,--noexecstack -MMD -MP "
 #FLAGS="--host=arm-androideabi-linux --enable-static --disable-shared --prefix=$HOME --enable-armv5e "
 CROSS_COMPILE=$PREBUILT/bin/arm-linux-androideabi-
 export CPPFLAGS="$CFLAGS"
 export CFLAGS="$CFLAGS"
 export CXXFLAGS="$CFLAGS"
 export CXX="${CROSS_COMPILE}g++ --sysroot=${PLATFORM}"
 export LDFLAGS="$LDFLAGS"
 export CC="${CROSS_COMPILE}gcc --sysroot=${PLATFORM}"
 export NM="${CROSS_COMPILE}nm"
 export STRIP="${CROSS_COMPILE}strip"
 export RANLIB="${CROSS_COMPILE}ranlib"
 export AR="${CROSS_COMPILE}ar"
 ./configure --program-prefix=$PREFIX \
 --host=arm-linux
 make
 cp ./libfaac/.libs/libfaac.a $ELIB
 cd -
 }
 function build_one
 {
 $FFMPEG_ROOT/configure --target-os=linux \
 --prefix=$PREFIX \
 --enable-cross-compile \
 --enable-runtime-cpudetect \
 --disable-asm \
 --arch=arm \
 --cc=$PREBUILT/bin/arm-linux-androideabi-gcc \
 --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \
 --disable-stripping \
 --nm=$PREBUILT/bin/arm-linux-androideabi-nm \
 --sysroot=$PLATFORM \
 --enable-nonfree \
 --enable-version3 \
 --enable-gpl \
 --disable-doc \
 --enable-avresample \
 --enable-demuxer=rtsp \
 --enable-muxer=rtsp \
 --disable-ffplay \
 --disable-ffserver \
 --enable-ffmpeg \
 --disable-ffprobe \
 --enable-libx264 \
 --enable-libfaac --enable-nonfree \
 --enable-encoder=libx264 \
 --enable-decoder=h264 \
 --enable-protocol=rtp \
 --enable-encoder=libfaac \
 --enable-decoder=aac \
 --enable-hwaccels \
 --enable-zlib \
 --disable-devices \
 --disable-avdevice \
 --extra-cflags="-I$X264_ROOT -I$FAAC_ROOT/include -fPIC -DANDROID -D__thumb__ -mthumb -Wfatal-errors -Wno-deprecated -mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=armv7-a" \
 --extra-ldflags="-L$ELIB"
 make -j4
 make install
 }
 mkdir -p $ELIB
 build_faac
 build_x264
 build_one