Enforce that codecs wait for their metadata in a proper-ish and consistent manner. Sort of a halfway patch; best would be to give them an internal copy of the current track information which lasts unaltered by playback until a track switch or unload.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29348 a1c6a512-1295-4272-9138-f99709370657

apps/codecs/aac.c

@@ -78,8 +78,8 @@ next_track:
         goto exit;
     }
 
-    while (!*ci->taginfo_ready && !ci->stop_codec)
-        ci->sleep(1);
+    if (codec_wait_taginfo() != 0)
+        goto done;
   
     file_offset = ci->id3->offset;
 
@@ -304,8 +304,6 @@ next_track:
         i++;
     }
 
-    err = CODEC_OK;
-
 done:
     LOGF("AAC: Decoded %lu samples\n", (unsigned long)sound_samples_done);