From: Wolfjourn <wolfjourn@users.sourceforge.net>
Date: Tue, 09 Oct 2007 23:49:46 -0700
Subject: demux_mpgaudio gives up too easily while searching preview.

When sniff_buffer_looks_like_mp3() finds a valid frame in the preview, it
looks directly ahead for another valid frame. If the next frame isn't valid,
it fails out instead of continuing to search the rest of the preview.

This results in the demuxer failing to correctly detect streams it can
handle if it manages to find garbage bytes that look like a valid frame
before it reaches legitimately valid frames in the stream.

The attached patch makes the search more exhaustive by continuing the search
if the neighbouring frame wasn't found.
diff -ur xine-lib-1.1.8/src/demuxers/demux_mpgaudio.c xine-lib-1.1.8-new/src/demuxers/demux_mpgaudio.c
--- xine-lib-1.1.8/src/demuxers/demux_mpgaudio.c	2007-08-18 19:36:45.000000000 -0400
+++ xine-lib-1.1.8-new/src/demuxers/demux_mpgaudio.c	2007-10-10 02:19:36.000000000 -0400
@@ -551,7 +551,7 @@
         lprintf("mpeg audio frame detected\n");
         return 1;
       }
-      break;
+      /* Continue searching if we didn't find the neighbouring frame. */
     }
   }
   return 0;