UnsatisfiedLInkError Liaison à FFMPEG avec NDK

Question

J'ai compilé FFMPEG pour android en utilisant les fichiers de bambuser. La compilation fonctionne bien. Pas d'erreurs J'ai également veillé à changer le nom du paquet dans build.sh. Cependant, une fois que j'essaye de lier aux dossiers, le téléphone jette un UnsatisfiedLinkError. Ce fichier est le Androkd.mk:

LOCAL_PATH := $(call my-dir) 

include $(CLEAR_VARS) 
MY_LIB_PATH := ffmpeg-android/build/ffmpeg/armeabi/lib 
LOCAL_MODULE := bambuser-libavcore 
LOCAL_SRC_FILES := $(MY_LIB_PATH)/libavcore.so 
include $(PREBUILT_SHARED_LIBRARY) 

include $(CLEAR_VARS) 
LOCAL_MODULE := bambuser-libavformat 
LOCAL_SRC_FILES := $(MY_LIB_PATH)/libavformat.so 
include $(PREBUILT_SHARED_LIBRARY) 

include $(CLEAR_VARS) 
LOCAL_MODULE := bambuser-libavcodec 
LOCAL_SRC_FILES := $(MY_LIB_PATH)/libavcodec.so 
include $(PREBUILT_SHARED_LIBRARY) 

include $(CLEAR_VARS) 
LOCAL_MODULE := bambuser-libavdevice 
LOCAL_SRC_FILES := $(MY_LIB_PATH)/libavdevice.so 
include $(PREBUILT_SHARED_LIBRARY) 

include $(CLEAR_VARS) 
LOCAL_MODULE := bambuser-libavfilter 
LOCAL_SRC_FILES := $(MY_LIB_PATH)/libavfilter.so 
include $(PREBUILT_SHARED_LIBRARY) 

include $(CLEAR_VARS) 
LOCAL_MODULE := bambuser-libavutil 
LOCAL_SRC_FILES := $(MY_LIB_PATH)/libavutil.so 
include $(PREBUILT_SHARED_LIBRARY) 

include $(CLEAR_VARS) 
LOCAL_MODULE := bambuser-libswscale 
LOCAL_SRC_FILES := $(MY_LIB_PATH)/libswscale.so 
include $(PREBUILT_SHARED_LIBRARY) 


#local_PATH := $(call my-dir) 

include $(CLEAR_VARS) 

LOCAL_MODULE := libtest_jni 
LOCAL_SRC_FILES := libtest/video.c 

LOCAL_C_INCLUDES := \ 
    $(LOCAL_PATH)/include \ 
     $(LOCAL_PATH)/ffmpeg-android/ffmpeg 
     LOCAL_LDLIBS := -L$(NDK_PLATFORMS_ROOT)/$(TARGET_PLATFORM)/arch-arm/usr/lib -L$(LOCAL_PATH) -L$(LOCAL_PATH)/ffmpeg-android/build/ffmpeg/armeabi/lib/ -lavformat -lavcodec -lavdevice -lavfilter -lavutil -lswscale -llog -lz -lm 
     #dl -lgcc 

     include $(BUILD_SHARED_LIBRARY) 

VIDEO.C est mort simple:

#include <libavcodec/avcodec.h> 
#include <libavformat/avformat.h> 
#include <libswscale/swscale.h> 

#include <jni.h> 
#include <string.h> 
#include <stdio.h> 
#include <android/log.h> 

void Java_com_bukabros_videolivewallpaper_Opengl2Renderer_loadNthFrame3 
     (JNIEnv * env, jobject this, jstring fileName) { 

     jboolean isCopy; 
     const char * szLogThis = (*env)->GetStringUTFChars(env, fileName, &isCopy); 

      __android_log_print(ANDROID_LOG_DEBUG, "NDK: ", "NDK:LC: [%s]", szLogThis); 
      } 

Tne code Java correspondant est aussi simple:

private native void loadNthFrame3(String fileName); 

static { 
System.loadLibrary("libtest_jni"); 
} 

Mais je reçois cette erreur:

E/AndroidRuntime(11489): FATAL EXCEPTION: main 

E/AndroidRuntime(11489): java.lang.ExceptionInInitializerError 

E/AndroidRuntime(11489): at com.bukabros.videolivewallpaper.VideoLiveWallpaper$CubeEngine.<init>(VideoLiveWallpaper.java:147) 

E/AndroidRuntime(11489): at com.bukabros.videolivewallpaper.VideoLiveWallpaper.onCreateEngine(VideoLiveWallpaper.java:120) 

E/AndroidRuntime(11489): at android.service.wallpaper.WallpaperService$IWallpaperEngineWrapper.executeMessage(WallpaperService.java:814) 

E/AndroidRuntime(11489): at com.android.internal.os.HandlerCaller$MyHandler.handleMessage(HandlerCaller.java:61) 

E/AndroidRuntime(11489): at android.os.Handler.dispatchMessage(Handler.java:99) 

E/AndroidRuntime(11489): at android.os.Looper.loop(Looper.java:123) 

E/AndroidRuntime(11489): at android.app.ActivityThread.main(ActivityThread.java:4627) 

E/AndroidRuntime(11489): at java.lang.reflect.Method.invokeNative(Native Method) 

E/AndroidRuntime(11489): at java.lang.reflect.Method.invoke(Method.java:521) 

E/AndroidRuntime(11489): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:878) 

E/AndroidRuntime(11489): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:636) 

E/AndroidRuntime(11489): at dalvik.system.NativeStart.main(Native Method) 

E/AndroidRuntime(11489): Caused by: java.lang.UnsatisfiedLinkError: Library libtest_jni not found 

E/AndroidRuntime(11489): at java.lang.Runtime.loadLibrary(Runtime.java:461) 

E/AndroidRuntime(11489): at java.lang.System.loadLibrary(System.java:557) 

E/AndroidRuntime(11489): at com.bukabros.videolivewallpaper.Opengl2Renderer.<clinit>(Opengl2Renderer.java:389) 

E/AndroidRuntime(11489): ... 12 more 

J'ai essayé de charger manuellement g les bibliothèques partagées précompétées (les fichiers bambuser) en Java (en utilisant System.loadLibrary) mais ensuite il me dit que les fichiers ne sont pas trouvés.

Si elle aide, voici la sortie de readelf:

0x00000001 (NEEDED)      Shared library: [libc.so] 
    0x00000001 (NEEDED)      Shared library: [libstdc++.so] 
    0x00000001 (NEEDED)      Shared library: [libm.so] 
    0x00000001 (NEEDED)      Shared library: [/data/data/com.bukabros.videolivewallpaper/lib/libavformat.so] 
    0x00000001 (NEEDED)      Shared library: [/data/data/com.bukabros.videolivewallpaper/lib/libavcodec.so] 
     0x00000001 (NEEDED)      Shared library: [/data/data/com.bukabros.videolivewallpaper/lib/libavdevice.so] 
     0x00000001 (NEEDED)      Shared library: [/data/data/com.bukabros.videolivewallpaper/lib/libavfilter.so] 
     0x00000001 (NEEDED)      Shared library: [/data/data/com.bukabros.videolivewallpaper/lib/libavutil.so] 
    0x00000001 (NEEDED)      Shared library: [/data/data/com.bukabros.videolivewallpaper/lib/libswscale.so] 
     0x00000001 (NEEDED)      Shared library: [liblog.so] 
     0x00000001 (NEEDED)      Shared library: [libz.so] 
     0x00000001 (NEEDED)      Shared library: [libdl.so] 
     0x0000000e (SONAME)      Library soname: [libtest_jni.so] 
      0x00000010 (SYMBOLIC)     0x0 
      0x00000004 (HASH)      0xd4 
      0x00000005 (STRTAB)      0x250 
     0x00000006 (SYMTAB)      0x130 
      0x0000000a (STRSZ)      712 (bytes) 
      0x0000000b (SYMENT)      16 (bytes) 
      0x00000003 (PLTGOT)      0x174c 
      0x00000002 (PLTRELSZ)     32 (bytes) 
       0x00000014 (PLTREL)      REL 
       0x00000017 (JMPREL)      0x55c 
       0x6ffffffe (VERNEED)     0x53c 
      0x6fffffff (VERNEEDNUM)     1 
       0x6ffffff0 (VERSYM)      0x518 
       0x00000000 (NULL)      0x0 

Oh oui. J'utilise ndk r5.

Answer 1

Il semblerait que j'ai trouvé la réponse. Le problème est que lorsque vous chargez la bibliothèque en Java (System.loadLibrary), vous ne pouvez pas utiliser le préfixe "lib". J'ai également dû charger manuellement les bibliothèques ffmpeg en Java. La morale de l'histoire est que vous devriez toujours lire les documents et ne donnent pas :-) Voici le code correct:

static { 
System.loadLibrary("avcore"); 
System.loadLibrary("avformat"); 
System.loadLibrary("avcodec"); 
System.loadLibrary("avdevice"); 
System.loadLibrary("avfilter"); 
System.loadLibrary("avutil"); 
System.loadLibrary("swscale"); 
System.loadLibrary("test_jni"); 
}