doxy comment tweaks

Originally committed as revision 8580 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/motion_est.c

@@ -103,8 +103,8 @@ static int get_flags(MotionEstContext *c, int direct, int chroma){
            + (chroma ? FLAG_CHROMA : 0);
 }
 
-/*! \brief compares two blocks, which may be full macroblocks or may be
+/*! \brief compares a block (either a full macroblock or a partition thereof)
-    partitions thereof.
+    against a proposed motion-compensated prediction of that block
  */
 static av_always_inline int cmp(MpegEncContext *s, const int x, const int y, const int subx, const int suby,
                       const int size, const int h, int ref_index, int src_index,

libavcodec/motion_est_template.c

@@ -1004,7 +1004,7 @@ static av_always_inline int epzs_motion_search_internal(MpegEncContext * s, int
     MotionEstContext * const c= &s->me;
     int best[2]={0, 0};      /*!< x and y coordinates of the best motion vector.
                                i.e. the difference between the position of the
-                               block current being encoded and the position of
+                               block currently being encoded and the position of
                                the block chosen to predict it from. */
     int d;                   ///< the score (cmp + penalty) of any given mv
     int dmin;                /*!< the best value of d, i.e. the score