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 JNI提供接口形式：

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1. static JNINativeMethod g_methods[] = {  
2.     {  
3.         "_setDataSource",  
4.         "(Ljava/lang/String;[Ljava/lang/String;[Ljava/lang/String;)V",  
5.         (void *) IjkMediaPlayer_setDataSourceAndHeaders  
6.     },  
7.     { "_setDataSourceFd",       "(I)V",     (void *) IjkMediaPlayer_setDataSourceFd },  
8.     { "_setDataSource",         "(Ltv/danmaku/ijk/media/player/misc/IMediaDataSource;)V", (void *)IjkMediaPlayer_setDataSourceCallback },  
9.   
10.     { "_setVideoSurface",       "(Landroid/view/Surface;)V", (void *) IjkMediaPlayer_setVideoSurface },  
11.     { "_prepareAsync",          "()V",      (void *) IjkMediaPlayer_prepareAsync },  
12.     { "_start",                 "()V",      (void *) IjkMediaPlayer_start },  
13.     { "_stop",                  "()V",      (void *) IjkMediaPlayer_stop },  
14.     { "seekTo",                 "(J)V",     (void *) IjkMediaPlayer_seekTo },  
15.     { "_pause",                 "()V",      (void *) IjkMediaPlayer_pause },  
16.     { "isPlaying",              "()Z",      (void *) IjkMediaPlayer_isPlaying },  
17.     { "getCurrentPosition",     "()J",      (void *) IjkMediaPlayer_getCurrentPosition },  
18.     { "getDuration",            "()J",      (void *) IjkMediaPlayer_getDuration },  
19.     { "_release",               "()V",      (void *) IjkMediaPlayer_release },  
20.     { "_reset",                 "()V",      (void *) IjkMediaPlayer_reset },  
21.     { "setVolume",              "(FF)V",    (void *) IjkMediaPlayer_setVolume },  
22.     { "getAudioSessionId",      "()I",      (void *) IjkMediaPlayer_getAudioSessionId },  
23.     { "native_init",            "()V",      (void *) IjkMediaPlayer_native_init },  
24.     { "native_setup",           "(Ljava/lang/Object;)V", (void *) IjkMediaPlayer_native_setup },  
25.     { "native_finalize",        "()V",      (void *) IjkMediaPlayer_native_finalize },  
26.   
27.     { "_setOption",             "(ILjava/lang/String;Ljava/lang/String;)V", (void *) IjkMediaPlayer_setOption },  
28.     { "_setOption",             "(ILjava/lang/String;J)V",                  (void *) IjkMediaPlayer_setOptionLong },  
29.   
30.     { "_getColorFormatName",    "(I)Ljava/lang/String;",    (void *) IjkMediaPlayer_getColorFormatName },  
31.     { "_getVideoCodecInfo",     "()Ljava/lang/String;",     (void *) IjkMediaPlayer_getVideoCodecInfo },  
32.     { "_getAudioCodecInfo",     "()Ljava/lang/String;",     (void *) IjkMediaPlayer_getAudioCodecInfo },  
33.     { "_getMediaMeta",          "()Landroid/os/Bundle;",    (void *) IjkMediaPlayer_getMediaMeta },  
34.     { "_setLoopCount",          "(I)V",                     (void *) IjkMediaPlayer_setLoopCount },  
35.     { "_getLoopCount",          "()I",                      (void *) IjkMediaPlayer_getLoopCount },  
36.     { "_getPropertyFloat",      "(IF)F",                    (void *) ijkMediaPlayer_getPropertyFloat },  
37.     { "_setPropertyFloat",      "(IF)V",                    (void *) ijkMediaPlayer_setPropertyFloat },  
38.     { "_getPropertyLong",       "(IJ)J",                    (void *) ijkMediaPlayer_getPropertyLong },  
39.     { "_setPropertyLong",       "(IJ)V",                    (void *) ijkMediaPlayer_setPropertyLong },  
40.     { "_setStreamSelected",     "(IZ)V",                    (void *) ijkMediaPlayer_setStreamSelected },  
41.   
42.     { "native_profileBegin",    "(Ljava/lang/String;)V",    (void *) IjkMediaPlayer_native_profileBegin },  
43.     { "native_profileEnd",      "()V",                      (void *) IjkMediaPlayer_native_profileEnd },  
44.   
45.     { "native_setLogLevel",     "(I)V",                     (void *) IjkMediaPlayer_native_setLogLevel },  
46. };  
47.   
48. JNIEXPORT jint JNI_OnLoad(JavaVM *vm, void *reserved)  
49. {  
50.     JNIEnv* env = NULL;  
51.   
52.     g_jvm = vm;  
53.     if ((*vm)->GetEnv(vm, (void**) &env, JNI_VERSION_1_4) != JNI_OK) {  
54.         return -1;  
55.     }  
56.     assert(env != NULL);  
57.   
58.     pthread_mutex_init(&g_clazz.mutex, NULL );  
59.   
60.     // FindClass returns LocalReference  
61.     IJK_FIND_JAVA_CLASS(env, g_clazz.clazz, JNI_CLASS_IJKPLAYER);  
62.     (*env)->RegisterNatives(env, g_clazz.clazz, g_methods, NELEM(g_methods) );  
63.   
64.     ijkmp_global_init();  
65.     ijkmp_global_set_inject_callback(inject_callback);  
66.   
67.     FFmpegApi_global_init(env);  
68.   
69.     return JNI_VERSION_1_4;  
70. }