RFC skin_tokens remove a static buffer

it was hard to hit this branch, I had to comment out:
ln 555    else if (offset == 1)
ln 556        pid3 = state->nid3;

as far as I can tell the reason for the separate filename buffer
was due to the failure mode of audio_peek_track() wiping
the id3->path, stands to reason for me that we can just fill it
again

-Already found a gotcha playlist_peek() mutates the buffer
 makes me like this solution less, might rework tagcache_fill_tags()
instead

--Fixed

Change-Id: I4a2ee71a8e2d0739c9e141948b71c2ed36296e3b

2 files changed, 20 insertions, 8 deletions

diff --git a/apps/gui/skin_engine/skin_tokens.c b/apps/gui/skin_engine/skin_tokens.c
index 082619432f..4bd1ffea31 100644
--- a/apps/gui/skin_engine/skin_tokens.c
+++ b/apps/gui/skin_engine/skin_tokens.c
@@ -556,20 +556,29 @@ static struct mp3entry* get_mp3entry_from_offset(int offset, char **filename)
         pid3 = state->nid3;
     else
     {
-        static char filename_buf[MAX_PATH + 1];
-        fname = playlist_peek(offset, filename_buf, sizeof(filename_buf));
+        static struct mp3entry tempid3; /* Note: path gets passed to outside fns */
+        memset(&tempid3, 0, sizeof(struct mp3entry));
+        /*static char filename_buf[MAX_PATH + 1];removed g#5926 */
+        fname = playlist_peek(offset, tempid3.path, sizeof(tempid3.path));
         *filename = (char*)fname;
-        static struct mp3entry tempid3;
+
         if (
 #if defined(HAVE_TC_RAMCACHE) && defined(HAVE_DIRCACHE)
-            tagcache_fill_tags(&tempid3, fname) ||
+            tagcache_fill_tags(&tempid3, NULL) ||
 #endif
             audio_peek_track(&tempid3, offset)
         )
         {
             pid3 = &tempid3;
         }
+        else /* failed */
+        {
+            /* ensure *filename gets the path, audio_peek_track() cleared it */
+            fname = playlist_peek(offset, tempid3.path, sizeof(tempid3.path));
+            *filename = (char*)fname;
+        }
     }
+
     return pid3;
 }
 
@@ -710,8 +719,6 @@ const char *get_token_value(struct gui_wps *gwps,
         return NULL;
 
     id3 = get_mp3entry_from_offset(token->next? 1: offset, &filename);
-    if (id3)
-        filename = id3->path;
 
 #if CONFIG_RTC
     struct tm* tm = NULL;
diff --git a/apps/tagcache.c b/apps/tagcache.c
index 1412647368..5bfeb82481 100644
--- a/apps/tagcache.c
+++ b/apps/tagcache.c
@@ -2085,13 +2085,18 @@ bool tagcache_fill_tags(struct mp3entry *id3, const char *filename)
         return false;
 
     /* Find the corresponding entry in tagcache. */
+
+    if (filename != NULL)
+        memset(id3, 0, sizeof(struct mp3entry));
+    else /* Note: caller clears id3 prior to call */
+        filename = id3->path;
+
     idx_id = find_entry_ram(filename);
     if (idx_id < 0)
         return false;
 
     entry = &tcramcache.hdr->indices[idx_id];
-
-    memset(id3, 0, sizeof(struct mp3entry));
+   
     char* buf = id3->id3v2buf;
     ssize_t remaining = sizeof(id3->id3v2buf);