VLC 加载插件仓库

1. 首先从  vlc/lib/libvlc_new（）入手 :   用于初始化一个libvlc的实例，argc表示参数的个数，argv表示参数，  
2.                                                 返回创建的实例若当发生错误时返回NULL  
3. {  
4.     //vlc/src/libvlc.c  
5.     libvlc_InternalCreate();  
6.     libvlc_InternalInit( p_libvlc_int, argc + 1, my_argv ) --->    
7.             module_InitBank (); ---> //加载模块,  
8.                 module_InitStatic(vlc_entry__main);  --->  
9.                     vlc_plugin_describe (entry) --->  
10.                         entry (vlc_plugin_setter, &module); ---->//加载main()   
11.                               
12.                             //libvlc-module.c  
13.                             vlc_module_begin ()    
14.                                 set_category( CAT_AUDIO )  
15.                                 set_subcategory( SUBCAT_AUDIO_GENERAL )  
16.                                 add_category_hint( N_("Audio"), AOUT_CAT_LONGTEXT , false )  
17.                                 .......  
18.                                 .......  
19.                                 .......  
20.                             vlc_module_end ()  
21.                               
22.                           
23.                 module_StoreBank();//加入链表  
24.             config_LoadCmdLine() //解译命令参数  
25.             module_LoadPlugins(); //加载各个插件模块  
26. } 

#define CONCATENATE( y, z ) CRUDE_HACK( y, z )
#define CRUDE_HACK( y, z )  y##__##z


#   define __VLC_SYMBOL( symbol )  CONCATENATE( symbol, MODULE_NAME )


#define vlc_module_begin() \
EXTERN_SYMBOL DLL_SYMBOL \
int CDECL_SYMBOL __VLC_SYMBOL(vlc_entry) (vlc_set_cb, void *); \
EXTERN_SYMBOL DLL_SYMBOL \
int CDECL_SYMBOL __VLC_SYMBOL(vlc_entry) (vlc_set_cb vlc_set, void *opaque) \


{ \
    module_t *module; \
    module_config_t *config = NULL; \
    if (vlc_plugin_set (VLC_MODULE_CREATE, &module)) \
        goto error; \
    if (vlc_module_set (VLC_MODULE_NAME, (MODULE_STRING))) \
        goto error;


#define vlc_module_end() \
    (void) config; \
    return 0; \
error: \
    return -1; \
} \
VLC_METADATA_EXPORTS