medialibrary: expose the `publicOnly` query parameter

Allow medialibrary queries to process and list public media.

Public media are a new addition of the medialibrary 0.13 version. With
this, the users will have the opportunity to allow a subset of the
medialibrary to be exposed on network interfaces (notably the upnp
server and the HTTP remote control).

Community discussions around the subject can be found here:
https://code.videolan.org/videolan/vlc/-/merge_requests/269#note_274345

include/vlc_media_library.h

@@ -443,6 +443,7 @@ typedef struct vlc_ml_query_params_t
     vlc_ml_sorting_criteria_t i_sort;
     bool b_desc;
     bool b_favorite_only;
+    bool b_public_only;
 } vlc_ml_query_params_t;
 
 enum vlc_ml_get_queries

modules/lua/libs/medialibrary.c

@@ -251,12 +251,14 @@ static void vlclua_ml_assign_params( lua_State *L, vlc_ml_query_params_t *params
     *params = vlc_ml_query_params_create();
     if (!lua_istable(L, paramIndex))
         return;
+    lua_getfield(L, 1, "public_only" );
     lua_getfield(L, 1, "favorite_only" );
     lua_getfield(L, 1, "limit" );
     lua_getfield(L, 1, "offset" );
     lua_getfield(L, 1, "desc" );
     lua_getfield(L, 1, "sort" );
     lua_getfield(L, 1, "pattern" );
+    params->b_public_only = lua_toboolean( L, -7 );
     params->b_favorite_only = lua_toboolean( L, -6 );
     params->i_nbResults = lua_tointeger( L, -5 );
     params->i_offset = lua_tointeger( L, -4 );

modules/misc/medialibrary/medialibrary.cpp

@@ -775,6 +775,7 @@ int MediaLibrary::List( int listQuery, const vlc_ml_query_params_t* params, va_l
         p.desc = params->b_desc;
         p.sort = sortingCriteria( params->i_sort );
         p.favoriteOnly = params->b_favorite_only;
+        p.publicOnly = params->b_public_only;
         nbItems = params->i_nbResults;
         offset = params->i_offset;
         psz_pattern = params->psz_pattern;

share/lua/README.txt

@@ -432,6 +432,7 @@ query_params = {
   "sort": integer,
   "pattern": string,
   "favorite_only": boolean,
+  "public_only": boolean,
 }
 
 vlc.ml.video(query_params): Get video media list