Thumbnail fixes (libretro#16062)

* Minor thumbnail improvements

- set standard name if only one entry is in the playlist
- use first database name for thumbnails if core has multiple

* Fix playlist thumbnail downloader

Playlist thumbnail downloader function was missed from the flexible
thumbnail name update, now it is added.

gfx/gfx_thumbnail_path.c

@@ -500,10 +500,19 @@ bool gfx_thumbnail_set_content_playlist(
       {
          char *db_name_no_ext = NULL;
          char tmp_buf[PATH_MAX_LENGTH];
-         /* Remove .lpl extension
-          * > path_remove_extension() requires a char * (not const)
-          *   so have to use a temporary buffer... */
-         strlcpy(tmp_buf, db_name, sizeof(tmp_buf));
+         const char* pos = strchr(db_name, '|');
+
+         if (pos && (size_t) (pos - db_name)+1 < sizeof(tmp_buf)) {
+            /* If db_name comes from core info, and there are multiple 
+             * databases mentioned separated by |, use only first one */
+            strlcpy(tmp_buf, db_name, (size_t) (pos - db_name)+1);
+         }
+         else {
+            /* Remove .lpl extension
+             * > path_remove_extension() requires a char * (not const)
+             *   so have to use a temporary buffer... */
+            strlcpy(tmp_buf, db_name, sizeof(tmp_buf));
+         }
          db_name_no_ext = path_remove_extension(tmp_buf);
 
          if (!string_is_empty(db_name_no_ext))

playlist.c

@@ -1097,6 +1097,11 @@ enum playlist_thumbnail_name_flags playlist_get_next_thumbnail_name_flag(playlis
             return PLAYLIST_THUMBNAIL_FLAG_SHORT_NAME;
    if (entry->thumbnail_flags & PLAYLIST_THUMBNAIL_FLAG_FULL_NAME)
             return PLAYLIST_THUMBNAIL_FLAG_STD_NAME;
+   /* Special case: only one entry in playlist, only one query is possible
+    * as flag swapping relies on going back and forth among entries
+    * so just use the most likely version here */
+   if (idx == 0 && RBUF_LEN(playlist->entries) == 1)
+            return PLAYLIST_THUMBNAIL_FLAG_STD_NAME;
    return PLAYLIST_THUMBNAIL_FLAG_FULL_NAME;
 }
 

tasks/task_pl_thumbnail_download.c

@@ -366,7 +366,8 @@ static void free_pl_thumb_handle(pl_thumb_handle_t *pl_thumb)
 static void task_pl_thumbnail_download_handler(retro_task_t *task)
 {
    pl_thumb_handle_t *pl_thumb = NULL;
-
+   enum playlist_thumbnail_name_flags next_flag = PLAYLIST_THUMBNAIL_FLAG_INVALID;
+
    if (!task)
       goto task_finished;
 
@@ -421,6 +422,8 @@ static void task_pl_thumbnail_download_handler(retro_task_t *task)
             /* Start iterating over thumbnail type */
             pl_thumb->type_idx  = 1;
             pl_thumb->status    = PL_THUMB_ITERATE_TYPE;
+            playlist_update_thumbnail_name_flag(pl_thumb->playlist, pl_thumb->list_index, PLAYLIST_THUMBNAIL_FLAG_FULL_NAME);
+            pl_thumb->name_flags = PLAYLIST_THUMBNAIL_FLAG_FULL_NAME;
          }
          else
          {
@@ -450,13 +453,22 @@ static void task_pl_thumbnail_download_handler(retro_task_t *task)
          /* Check whether all thumbnail types have been processed */
          if (pl_thumb->type_idx > 3)
          {
-            /* Time to move on to the next entry */
-            pl_thumb->list_index++;
-            if (pl_thumb->list_index < pl_thumb->list_size)
-               pl_thumb->status = PL_THUMB_ITERATE_ENTRY;
-            else
-               pl_thumb->status = PL_THUMB_END;
-            break;
+            next_flag = playlist_get_next_thumbnail_name_flag(pl_thumb->playlist,pl_thumb->list_index);
+            if (next_flag == PLAYLIST_THUMBNAIL_FLAG_NONE) {
+               if (pl_thumb->playlist )
+               /* Time to move on to the next entry */
+               pl_thumb->list_index++;
+               if (pl_thumb->list_index < pl_thumb->list_size)
+                  pl_thumb->status = PL_THUMB_ITERATE_ENTRY;
+               else
+                  pl_thumb->status = PL_THUMB_END;
+               break;
+            } else {
+               /* Increment the name flag to cover the 3 supported naming conventions. */
+               pl_thumb->type_idx = 1;
+               playlist_update_thumbnail_name_flag(pl_thumb->playlist, pl_thumb->list_index, next_flag);
+               pl_thumb->name_flags = next_flag;
+            }
          }
 
          /* Download current thumbnail */