access: implement STREAM_GET_PRIVATE_BLOCK

src/input/access.c

@@ -326,6 +326,19 @@ static int AStreamControl(stream_t *s, int cmd, va_list args)
             return vlc_access_Seek(sys->access, pos);
         }
 
+        case STREAM_GET_PRIVATE_BLOCK:
+        {
+            block_t **b = va_arg(args, block_t **);
+            bool *eof = va_arg(args, bool *);
+
+            if (access->pf_block == NULL)
+                return VLC_EGENERIC;
+
+            *b = vlc_access_Eof(access) ? NULL : vlc_access_Block(access);
+            *eof = (*b == NULL) && vlc_access_Eof(access);
+            break;
+        }
+
         default:
             return VLC_EGENERIC;
     }