Add comment

Originally committed as revision 13469 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavcodec/ra144.c b/libavcodec/ra144.c
index 10bfbf9..55628bb 100644 (file)
--- a/libavcodec/ra144.c
+++ b/libavcodec/ra144.c
@@ -31,7 +31,7 @@
 
 /* internal globals */
 typedef struct {
-    unsigned int     old_energy;
+    unsigned int     old_energy;        ///< previous frame energy
 
     /* the swapped buffers */
     unsigned int     lpc_tables[4][10];