fixing colocated mv if colocated block is L1 predicted for the temporal direct case

untested (none of the conformance streams laying around on my disk seems affected by this change)

Originally committed as revision 4477 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/h264.c

@@ -1330,7 +1330,7 @@ static inline void pred_direct_motion(H264Context * const h, int *mb_type){
                 const int ref0 = l1ref0[0] >= 0 ? h->map_col_to_list0[0][l1ref0[0]]
                                                 : h->map_col_to_list0[1][l1ref1[0]];
                 const int dist_scale_factor = h->dist_scale_factor[ref0];
-                const int16_t *mv_col = l1mv0[0];
+                const int16_t *mv_col = l1ref0[0] >= 0 ? l1mv0[0] : l1mv1[0];
                 int mv_l0[2];
                 mv_l0[0] = (dist_scale_factor * mv_col[0] + 128) >> 8;
                 mv_l0[1] = (dist_scale_factor * mv_col[1] + 128) >> 8;
@@ -1343,6 +1343,7 @@ static inline void pred_direct_motion(H264Context * const h, int *mb_type){
                 const int x8 = i8&1;
                 const int y8 = i8>>1;
                 int ref0, dist_scale_factor;
+                int16_t (*l1mv)[2]= l1mv0;
 
                 if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
                     continue;
@@ -1358,14 +1359,16 @@ static inline void pred_direct_motion(H264Context * const h, int *mb_type){
                 ref0 = l1ref0[x8 + y8*h->b8_stride];
                 if(ref0 >= 0)
                     ref0 = h->map_col_to_list0[0][ref0];
-                else
+                else{
                     ref0 = h->map_col_to_list0[1][l1ref1[x8 + y8*h->b8_stride]];
+                    l1mv= l1mv1;
+                }
                 dist_scale_factor = h->dist_scale_factor[ref0];
     
                 fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, ref0, 1);
                 fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, 0, 1);
                 for(i4=0; i4<4; i4++){
-                    const int16_t *mv_col = l1mv0[x8*2 + (i4&1) + (y8*2 + (i4>>1))*h->b_stride];
+                    const int16_t *mv_col = l1mv[x8*2 + (i4&1) + (y8*2 + (i4>>1))*h->b_stride];
                     int16_t *mv_l0 = h->mv_cache[0][scan8[i8*4+i4]];
                     mv_l0[0] = (dist_scale_factor * mv_col[0] + 128) >> 8;
                     mv_l0[1] = (dist_scale_factor * mv_col[1] + 128) >> 8;