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終于在android下面完成了ffmpeg最新版的編譯 --lihn1987(轉(zhuǎn)載請注明作者) 其實(shí)網(wǎng)絡(luò)上關(guān)于android編譯ffmpeg的文章已經(jīng)相當(dāng)多了，我也嘗試過很多，但是照著他們的做咋老是編不出東西呢？不是config出錯就是make出錯。也許是我的模仿能力太差了。。。。 于是我瀏覽了下網(wǎng)上各位達(dá)人的方法，發(fā)現(xiàn)基本大同小異，都是參考的一個開源項(xiàng)目 由于我移植搞不出來，所以無奈也去參考這個項(xiàng)目，在此，我對這個項(xiàng)目的負(fù)責(zé)人表示由衷的感謝，thk U?。。?！ 各位博友如果按照我的說法搞不定的話，也可以去參考下這個項(xiàng)目最初的做法哈。如果實(shí)在搞不定，可以加我的百度hi），我可以提供修改好的代碼，直接ndk-build即可,畢竟這個也不是我第一個鉆研出來的，和大家分享才是硬道理。 以下是正文 ffmpeg目錄下增加Android.mk 和av.mk config.sh三個文件
>>>>>Android.mk
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_WHOLE_STATIC_LIBRARIES := libavformat libavcodec libavutil libpostproc libswscale LOCAL_MODULE := ffmpeg include $(BUILD_SHARED_LIBRARY) include $(call all-makefiles-under,$(LOCAL_PATH))
>>>>>av.mk # LOCAL_PATH is one of libavutil, libavcodec, libavformat, or libswscale
#include $(LOCAL_PATH)/../config-$(TARGET_ARCH).mak include $(LOCAL_PATH)/../config.mak
OBJS := OBJS-yes := MMX-OBJS-yes := include $(LOCAL_PATH)/Makefile
# collect objects OBJS-$(HAVE_MMX) += $(MMX-OBJS-yes) OBJS += $(OBJS-yes)
FFNAME := lib$(NAME) FFLIBS := $(foreach,NAME,$(FFLIBS),lib$(NAME))
FFCFLAGS = -DHAVE_AV_CONFIG_H -Wno-sign-compare -Wno-switch -Wno-pointer-sign FFCFLAGS += -DTARGET_CONFIG=\"config-$(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)) else C_OBJS := $(OBJS) S_OBJS := endif
C_FILES := $(patsubst %.o,%.c,$(C_OBJS)) S_FILES := $(patsubst %.o,%.S,$(S_OBJS))
FFFILES := $(sort $(S_FILES)) $(sort $(C_FILES))
>>>>>>>>>config.sh #!/bin/sh PREBUILT=/root/android-ndk-r5/toolchains/arm-eabi-4.4.0/prebuilt/linux-x86 PLATFORM=/root/android-ndk-r5/platforms/android-4/arch-arm ./configure --target-os=linux \ --arch=armv41 \ --enable-cross-compile \ --cc=$PREBUILT/bin/arm-eabi-gcc \ --cross-prefix=$PREBUILT/bin/arm-eabi- \ --nm=$PREBUILT/bin/arm-eabi-nm \ --extra-cflags="-fPIC -DANDROID" \ --enable-static \ --disable-shared \ --disable-asm \ --disable-yasm \ --prefix=/home/ffmpeg-android-bin \ --extra-ldflags="-Wl,-T,$PREBUILT/arm-eabi/lib/ldscripts/armelf.x -Wl,\ -rpath-link=$PLATFORM/usr/lib \ -L$PLATFORM/usr/lib -nostdlib \ $PREBUILT/lib/gcc/arm-eabi/4.4.0/crtbegin.o \ $PREBUILT/lib/gcc/arm-eabi/4.4.0/crtend.o -lc -lm -ldl"
在libavcodec中添加Andorid.mk文件
>>>>>>>>>>>>>>>>Android.mk
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS)
include $(LOCAL_PATH)/../av.mk
LOCAL_SRC_FILES := $(FFFILES)
LOCAL_C_INCLUDES :=\ $(LOCAL_PATH)\ $(LOCAL_PATH)/..
LOCAL_CFLAGS += $(FFCFLAGS)
LOCAL_LDLIBS := -lz LOCAL_STATIC_LIBRARIES := $(FFLIBS)
LOCAL_MODULE := $(FFNAME)
include $(BUILD_STATIC_LIBRARY)
在libavfilter中添加Android.mk文件 >>>>>>>>>>>>>>>>Android.mk
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS)
include $(LOCAL_PATH)/../av.mk
LOCAL_SRC_FILES := $(FFFILES)
LOCAL_C_INCLUDES :=\ $(LOCAL_PATH)\ $(LOCAL_PATH)/..
LOCAL_CFLAGS += $(FFCFLAGS)
LOCAL_STATIC_LIBRARIES := $(FFLIBS)
LOCAL_MODULE := $(FFNAME)
include $(BUILD_STATIC_LIBRARY)
在libavformat中添加Andorid.mk文件 >>>>>>>>>>>>>>>>Android.mk
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS)
include $(LOCAL_PATH)/../av.mk
LOCAL_SRC_FILES := $(FFFILES)
LOCAL_C_INCLUDES :=\ $(LOCAL_PATH)\ $(LOCAL_PATH)/..
LOCAL_CFLAGS += $(FFCFLAGS) LOCAL_CFLAGS += -include "string.h" -Dipv6mr_interface=ipv6mr_ifindex
LOCAL_LDLIBS := -lz LOCAL_STATIC_LIBRARIES := $(FFLIBS)
LOCAL_MODULE := $(FFNAME)
include $(BUILD_STATIC_LIBRARY)
在libavutil中添加Android.mk文件 >>>>>>>>>>>>>>>>Android.mk
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS)
include $(LOCAL_PATH)/../av.mk
LOCAL_SRC_FILES := $(FFFILES)
LOCAL_C_INCLUDES :=\ $(LOCAL_PATH)\ $(LOCAL_PATH)/..
LOCAL_CFLAGS += $(FFCFLAGS)
LOCAL_STATIC_LIBRARIES := $(FFLIBS)
LOCAL_MODULE := $(FFNAME)
include $(BUILD_STATIC_LIBRARY)
在libpostproc中添加Android.mk文件 >>>>>>>>>>>>>>>>>>>>>>Android.mk LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS)
include $(LOCAL_PATH)/../av.mk
LOCAL_SRC_FILES := $(FFFILES)
LOCAL_C_INCLUDES :=\ $(LOCAL_PATH)\ $(LOCAL_PATH)/..
LOCAL_CFLAGS += $(FFCFLAGS)
LOCAL_STATIC_LIBRARIES := $(FFLIBS)
LOCAL_MODULE := $(FFNAME)
include $(BUILD_STATIC_LIBRARY)
在libswscale中添加Android.mk文件 >>>>>>>>>>>>>>>>>>>>Android.mk
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS)
include $(LOCAL_PATH)/../av.mk
LOCAL_SRC_FILES := $(FFFILES)
LOCAL_C_INCLUDES :=\ $(LOCAL_PATH)\ $(LOCAL_PATH)/..
LOCAL_CFLAGS += $(FFCFLAGS)
LOCAL_STATIC_LIBRARIES := $(FFLIBS)
LOCAL_MODULE := $(FFNAME)
include $(BUILD_STATIC_LIBRARY)
在libavcodec,libavfilter,libavformat,libavutil,libpostproc,libswscale中找到 這行 include $(SUBDIR)../config.mak 和這行 include $(SUBDIR)../subdir.mak 然后把這兩行全部刪除
接下來就簡單了， 進(jìn)入ffmpeg目錄，運(yùn)行./config.sh腳本 會自動生成config.h和config.mak,如果生成過程出現(xiàn)錯誤，那么大多就是編譯器配置目錄的問題了。 然后修改兩個文件，把config.h中的 #define restrict restrict 改為 #define restrict 把ffmpeg/libavutil/libm.h中所有static的函數(shù)刪除。 然后 新建一個ffmpeg_android，著這個文件夾里在建立個jni 然后把我們的ffmpeg放到j(luò)ni里，同時在jni里在創(chuàng)建一個Android.mk，內(nèi)容如下 >>>>>>>>>>>>>>>>>>>>>Android.mk
include $(all-subdir-makefiles) 然后目錄調(diào)到ffmpeg_android運(yùn)行 /root/android-ndk-r5/ndk-build即可 由于我用的是最新的代碼（svn上更新下來的）中間可能會出一些編譯錯誤，比如對for(int i; i<x;i++)這種格式的不支持啊，就直接把int i提到for外面即可，別的就沒啥問題了。 如果有編不出來的，歡迎留言和百度hi聯(lián)系哈~~~~ |
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