编译Android下的ffmpeg 1.2
来源:互联网 发布:windows shell编程入门 编辑:程序博客网 时间:2024/06/14 10:12
编译环境:ubuntu 12.04
NDK版本:android-ndk-r8d
ffmpeg版本:1.2
参考博文:
http://blog.csdn.net/cbzhaojay/article/details/8524915
http://blog.csdn.net/cbzhaojay/article/details/8688547
新建Android工程,在工程目录中创建jni文件夹
1、在jni目录下添加如下文件Android.mk ,内容如下:
include $(all-subdir-makefiles)
2.在jni/ffmpeg下添加Android.mk内容如下:
LOCAL_PATH := $(call my-dir)include $(CLEAR_VARS)LOCAL_WHOLE_STATIC_LIBRARIES := libavformat libavcodec libavutil libpostproc libswscale libswresampleLOCAL_MODULE := ffmpeginclude $(BUILD_SHARED_LIBRARY)include $(call all-makefiles-under,$(LOCAL_PATH))
3.在jni/ffmpeg下添加av.mk
# 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))
4.在jni/ffmpeg/libavformat下添加Android,mk内容如下:
LOCAL_PATH := $(call my-dir)include $(CLEAR_VARS)include $(LOCAL_PATH)/../av.mkLOCAL_SRC_FILES := $(FFFILES)LOCAL_C_INCLUDES := \$(LOCAL_PATH) \$(LOCAL_PATH)/..LOCAL_CFLAGS += $(FFCFLAGS)LOCAL_CFLAGS += -include "string.h" -Dipv6mr_interface=ipv6mr_ifindexLOCAL_LDLIBS := -lzLOCAL_STATIC_LIBRARIES := $(FFLIBS)LOCAL_MODULE := $(FFNAME)include $(BUILD_STATIC_LIBRARY)
5. 在jni/ffmpeg/libavcodec下添加Android,mk内容如下:
LOCAL_PATH := $(call my-dir)include $(CLEAR_VARS)include $(LOCAL_PATH)/../av.mkLOCAL_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)
6.在jni/ffmpeg/libavutil libpostproc libswscale libswresample 下添加Android,mk内容如下:
LOCAL_PATH := $(call my-dir)include $(CLEAR_VARS)include $(LOCAL_PATH)/../av.mkLOCAL_SRC_FILES := $(FFFILES)LOCAL_C_INCLUDES := \$(LOCAL_PATH) \$(LOCAL_PATH)/..LOCAL_CFLAGS += $(FFCFLAGS)LOCAL_STATIC_LIBRARIES := $(FFLIBS)LOCAL_MODULE := $(FFNAME)include $(BUILD_STATIC_LIBRARY)
7.在jni/ffmpeg 下添加可执行文件config.sh, 内容如下
#!/bin/bash PREBUILT=/home/cbz/android-ndk-r8d/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86PLATFORM=/home/cbz/android-ndk-r8d/platforms/android-9/arch-arm ./configure --target-os=linux \--arch=arm \--enable-version3 \--enable-gpl \--enable-nonfree \--enable-shared \--disable-stripping \--disable-ffmpeg \--disable-ffplay \--disable-ffserver \--disable-ffprobe \--disable-symver \--enable-encoders \--enable-muxers \--disable-devices \--disable-protocols \--enable-protocol=file \--enable-avfilter \--disable-network \--disable-avdevice \--disable-asm \--enable-cross-compile \--cc=$PREBUILT/bin/arm-linux-androideabi-gcc \--cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \--strip=$PREBUILT/bin/arm-linux-androideabi-strip \--extra-cflags="-fPIC -DANDROID" \--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" \sed -i 's/HAVE_LRINT 0/HAVE_LRINT 1/g' config.hsed -i 's/HAVE_LRINTF 0/HAVE_LRINTF 1/g' config.hsed -i 's/HAVE_ROUND 0/HAVE_ROUND 1/g' config.hsed -i 's/HAVE_ROUNDF 0/HAVE_ROUNDF 1/g' config.hsed -i 's/HAVE_TRUNC 0/HAVE_TRUNC 1/g' config.hsed -i 's/HAVE_TRUNCF 0/HAVE_TRUNCF 1/g' config.hsed -i 's/HAVE_CBRT 0/HAVE_CBRT 1/g' config.hsed -i 's/HAVE_CBRTF 0/HAVE_CBRTF 1/g' config.hsed -i 's/HAVE_ISINF 0/HAVE_ISINF 1/g' config.hsed -i 's/HAVE_ISNAN 0/HAVE_ISNAN 1/g' config.hsed -i 's/HAVE_SINF 0/HAVE_SINF 1/g' config.hsed -i 's/HAVE_RINT 0/HAVE_RINT 1/g' config.h
上面PREBUILT PLATFORM的路径自己根据NDK的路径自己更改,并增加可执行权限,命令如下:
chmod +x config.sh
4、命令行到jni/ffmpeg目录下执行
./config.sh
5、修改
a、删除 libavformat libavcodec libavutil libpostproc libswscale libswresample 目录下Makefile下的
include $(SUBDIR)../config.mak
b、删除libavcodec libavutil libswresample目录下Makefile下的
log2_tab.o \
c、修改jni/ffmpeg/config.h下的
#define avrestrict restrict为#define restrict
e、把 ffmpeg/libavutil/time.h更名为avtime.h,
同时修改下面文件中的引用libavutil/time.h为libavutil/avtime.h
ffmpeg/libavformat/avformat.h:211
ffmpeg/libavformat/avio.c:25
ffmpeg/libavformat/hls.c:33
ffmpeg/libavformat/mux.c:39:30
ffmpeg/libavformat/utils.c:40
ffmpeg/libavutil/time.c:36
6、接下来就是编译了
cd ..
命令行到项目project目录下执行
$NDK/ndk-build
问题一:
Install : libffplay.so => libs/armeabi-v7a/libffplay.so
Install : libiptv_media_player_jni.so => libs/armeabi-v7a/libiptv_media_player_jni.so
/home/rds/share/xiongms/android-ndk-r8d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: warning: hidden symbol '__aeabi_atexit' in ./obj/local/armeabi-v7a/libgnustl_static.a(atexit_arm.o) is referenced by DSO ./obj/local/armeabi-v7a/libffplay.so
/home/rds/share/xiongms/android-ndk-r8d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: ./obj/local/armeabi-v7a/libswscale.a(swscale.o): in function swScale:jni/libffmpeg/libswscale/swscale.c:426: error: undefined reference to 'av_get_cpu_flags'
/home/rds/share/xiongms/android-ndk-r8d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: ./obj/local/armeabi-v7a/libswscale.a(utils.o): in function sws_init_context:jni/libffmpeg/libswscale/utils.c:917: error: undefined reference to 'av_get_cpu_flags'
/home/rds/share/xiongms/android-ndk-r8d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: ./obj/local/armeabi-v7a/libswresample.a(resample.o): in function multiple_resample:jni/libffmpeg/libswresample/resample.c:315: error: undefined reference to 'av_get_cpu_flags'
将Android.mk中的
LOCAL_STATIC_LIBRARIES := libavformat libavcodec libavutil libpostproc libswscale libswresample libmediaplayer
改为
LOCAL_WHOLE_STATIC_LIBRARIES := libavformat libavcodec libavutil libpostproc libswscale libswresample libmediaplayer
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