android-ndk-r7b编译ffmpeg0.10

1、编写 mk 文件

      1.1 在/home/yinjk/FFMPEG/ffmpegDir/jni目录中创建一个 Android.mk 文件，内容如下

include $(all-subdir-makefiles)

      1.2、在/home/yinjk/FFMPEG/ffmpegDir/jni/ffmpeg目录中创建一个 Android.mk 文件，内容如下

LOCAL_PATH := $(call my-dir)include $(CLEAR_VARS)LOCAL_WHOLE_STATIC_LIBRARIES := libavutil  libavcodec libpostproc libswscale libavformat libswresample libavfilterLOCAL_ARM_MODE := armLOCAL_MODULE := ffmpeginclude $(BUILD_SHARED_LIBRARY)include $(call all-makefiles-under,$(LOCAL_PATH))

      1.3、在/home/yinjk/FFMPEG/ffmpegDir/jni/ffmpeg目录中创建一个 av.mk 文件，内容如下

# LOCAL_PATH is one of libavutil, libavcodec, libavformat, or libswscale#include $(LOCAL_PATH)/../config-$(TARGET_ARCH).makinclude $(LOCAL_PATH)/../config.makOBJS :=OBJS-yes :=MMX-OBJS-yes :=include $(LOCAL_PATH)/Makefile# collect objectsOBJS-$(HAVE_MMX) += $(MMX-OBJS-yes)OBJS += $(OBJS-yes)FFNAME := lib$(NAME)FFLIBS := $(foreach,NAME,$(FFLIBS),lib$(NAME))FFCFLAGS  = -DHAVE_AV_CONFIG_H -Wno-sign-compare -Wno-switch -Wno-pointer-signFFCFLAGS += -DTARGET_CONFIG=/"config-$(TARGET_ARCH).h/"ALL_S_FILES := $(wildcard $(LOCAL_PATH)/$(TARGET_ARCH)/*.S)ALL_S_FILES := $(addprefix $(TARGET_ARCH)/, $(notdir $(ALL_S_FILES)))ifneq ($(ALL_S_FILES),)ALL_S_OBJS := $(patsubst %.S,%.o,$(ALL_S_FILES))C_OBJS := $(filter-out $(ALL_S_OBJS),$(OBJS))S_OBJS := $(filter $(ALL_S_OBJS),$(OBJS))elseC_OBJS := $(OBJS)S_OBJS :=endifC_FILES := $(patsubst %.o,%.c,$(C_OBJS))S_FILES := $(patsubst %.o,%.S,$(S_OBJS))FFFILES := $(sort $(S_FILES)) $(sort $(C_FILES))

      1.4、在/home/yinjk/FFMPEG/ffmpegDir/jni/ffmpeg/libavcodec 目录中创建一个 Android.mk 文件，内容如下

LOCAL_PATH := $(call my-dir)include $(CLEAR_VARS)include $(LOCAL_PATH)/../av.mkLOCAL_ARM_MODE := armLOCAL_SRC_FILES := $(FFFILES)LOCAL_C_INCLUDES := \    $(LOCAL_PATH) \    $(LOCAL_PATH)/..LOCAL_CFLAGS += $(FFCFLAGS)LOCAL_LDLIBS := -lzLOCAL_STATIC_LIBRARIES := $(FFLIBS)LOCAL_MODULE := $(FFNAME)include $(BUILD_STATIC_LIBRARY)

      1.5、在/home/yinjk/FFMPEG/ffmpegDir/jni/ffmpeg/libavformat 目录中创建一个 Android.mk 文件，内容如下

LOCAL_PATH:= $(call my-dir)include $(CLEAR_VARS)include $(LOCAL_PATH)/../av.mkLOCAL_ARM_MODE := armLOCAL_SRC_FILES :=$(FFFILES)LOCAL_C_INCLUDES:=  \ $(LOCAL_PATH)  \ $(LOCAL_PATH)/..LOCAL_CFLAGS += $(FFCFLAGS)LOCAL_CFLAGS += -include "string.h" -Dipv6mr_interface=ipv6mr_ifindexLOCAL_LDLIBS := -lzLOCAL_SHARED_LIBRARIES := $(FFLIBS)LOCAL_MODULE:= $(FFNAME)include $(BUILD_STATIC_LIBRARY)

      1.6、在 libavfilter、libavutil、libpostproc、libswscale和libswresample 目录中各创建一个 Android.mk 文件，内容如下

LOCAL_PATH := $(call my-dir)include $(CLEAR_VARS)include $(LOCAL_PATH)/../av.mkLOCAL_ARM_MODE := armLOCAL_SRC_FILES := $(FFFILES)LOCAL_C_INCLUDES :=\$(LOCAL_PATH)\$(LOCAL_PATH)/..LOCAL_CFLAGS += $(FFCFLAGS)LOCAL_STATIC_LIBRARIES := $(FFLIBS)LOCAL_MODULE := $(FFNAME)include $(BUILD_STATIC_LIBRARY)

2、修改 libm.h 文件和 Makefile 文件

      2.1、编辑/home/yinjk/FFMPEG/ffmpegDir/jni/ffmpeg/libavutil 目录中的 libm.h 文件，删除所有static 方法
      2.2、编辑 libavcodec、libavfilter、libavformat、libavutil、libpostproc 、libswresample 和 libswscale 目录中的 Makefile 文件，删除

      include $(SUBDIR)../subdir.mak      和      include $(SUBDIR)../config.mak      两行

3、生成 config.h 文件

      3.1、在/home/yinjk/FFMPEG/ffmpegDir/jni/ffmpeg目录中创建一个 config.sh 文件，使用 Android NDK r7b 编译时内容如下：

#!/bin/bashPREBUILT=/home/yinjk/FFMPEG/android-ndk-r7b/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86PLATFORM=/home/yinjk/FFMPEG/android-ndk-r7b/platforms/android-14/arch-arm./configure --target-os=linux \--arch=arm \--enable-version3 \--enable-gpl \--enable-nonfree \--enable-small \--disable-stripping \--disable-ffmpeg \--disable-ffplay \--disable-ffserver \--disable-ffprobe \--disable-encoders \--disable-muxers \--disable-devices \--disable-protocols \--enable-protocol=file \--enable-avfilter \--disable-network \--disable-avdevice \--enable-cross-compile \--cc=$PREBUILT/bin/arm-linux-androideabi-gcc-4.4.3 \--cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \--nm=$PREBUILT/bin/arm-linux-androideabi-nm \--extra-cflags="-fPIC -DANDROID" \--disable-asm \--enable-neon \--enable-armv5te \--extra-ldflags="-Wl,-T,$PREBUILT/arm-linux-androideabi/lib/ldscripts/armelf_linux_eabi.x -Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib $PREBUILT/lib/gcc/arm-linux-androideabi/4.4.3/crtbegin.o $PREBUILT/lib/gcc/arm-linux-androideabi/4.4.3/crtend.o -lc -lm -ldl"

      3.2、打开终端，进入/home/yinjk/FFMPEG/ffmpegDir/jni/ffmpeg目录，运行下面的命令

chmod +x config.sh./config.sh

后生成config.h和config.mak文件，config.mak文件可不必关心。  

3.3、编辑/home/yinjk/FFMPEG/ffmpegDir/jni/ffmpeg目录中的 config.h 文件，将

#define restrict restrict

修改为

#define restrict

4、开始编译 FFmpeg

执行命令 /home/yinjk/FFMPEG/android-ndk-r7b/ndk-build NDK_PROJECT_PATH=/home/yinjk/FFMPEG/ffmpegDir

编译完成后显示如下信息：

StaticLibrary  : libavfilter.aSharedLibrary  : libffmpeg.soInstall        : libffmpeg.so => libs/armeabi/libffmpeg.so

到此编译完成。