Index: encoder/macroblock.c
===================================================================
--- encoder/macroblock.c	(Revision 295)
+++ encoder/macroblock.c	(Arbeitskopie)
@@ -592,8 +592,21 @@
             const int i_dst = h->mb.pic.i_stride[0];
             uint8_t  *p_dst = &h->mb.pic.p_fdec[0][4 * block_idx_x[i] + 4 * block_idx_y[i] * i_dst];
             int      i_mode = h->mb.cache.intra4x4_pred_mode[x264_scan8[i]];
+			uint32_t bak;
 
+            /* backup the original samples and emulate the not available topright samples*/
+            if(!(h->mb.i_neighbour4[i] & 4) && (h->mb.i_neighbour4[i] & 2)){
+				bak = *(uint32_t*) (p_dst + 4 - i_dst);
+                *(uint32_t*) (p_dst + 4 - i_dst) = p_dst[3 - i_dst]*0x01010101U;
+            }
+
             h->predict_4x4[i_mode]( p_dst, i_dst );
+
+            /*restore the original samples*/
+            if(!(h->mb.i_neighbour4[i] & 4) && (h->mb.i_neighbour4[i] & 2)){
+                    *(uint32_t*) (p_dst + 4 - i_dst) = bak;
+            }
+
             x264_mb_encode_i4x4( h, i, i_qp );
             h->mb.cache.intra4x4_pred_mode[x264_scan8[i]] = x264_mb_pred_mode4x4_fix(i_mode);
         }
Index: encoder/analyse.c
===================================================================
--- encoder/analyse.c	(Revision 295)
+++ encoder/analyse.c	(Arbeitskopie)
@@ -364,9 +364,7 @@
 static void predict_4x4_mode_available( unsigned int i_neighbour,
                                         int *mode, int *pi_count )
 {
-    /* FIXME even when b_tr == 0 there is some case where missing pixels
-     * are emulated and thus more mode are available TODO
-     * analysis and encode should be fixed too */
+
     int b_l = i_neighbour & MB_LEFT;
     int b_t = i_neighbour & MB_TOP;
     int b_tr = i_neighbour & MB_TOPRIGHT;
@@ -407,6 +405,12 @@
         *mode++ = I_PRED_4x4_VL;
         (*pi_count) += 2;
     }
+    else if( b_t && !b_tr )
+    {
+        *mode++ = I_PRED_4x4_DDL;
+        *mode++ = I_PRED_4x4_VL;
+        (*pi_count) += 2;
+    }
 }
 
 static void x264_mb_analyse_intra_chroma( x264_t *h, x264_mb_analysis_t *a )
@@ -532,6 +536,7 @@
             int     i_best;
             int x, y;
             int i_pred_mode;
+            uint32_t bak=0;
 
             i_pred_mode= x264_mb_predict_intra4x4_mode( h, idx );
             x = block_idx_x[idx];
@@ -542,6 +547,13 @@
 
             i_best = COST_MAX;
             predict_4x4_mode_available( h->mb.i_neighbour4[idx], predict_mode, &i_max );
+
+            /* backup the original samples and emulate the not available topright samples*/
+            if(!(h->mb.i_neighbour4[idx] & 4) && (h->mb.i_neighbour4[idx] & 2)){
+                bak = *(uint32_t*) (p_src_by+4 - i_stride);
+                *(uint32_t*) (p_src_by+4 - i_stride) = p_src_by[3 - i_stride]*0x01010101U;
+            }
+
             for( i = 0; i < i_max; i++ )
             {
                 int i_sad;
@@ -562,6 +574,11 @@
             }
             a->i_sad_i4x4 += i_best;
 
+            /*restore the original samples*/
+            if(!(h->mb.i_neighbour4[idx] & 4) && (h->mb.i_neighbour4[idx] & 2)){
+                    *(uint32_t*) (p_src_by+4 - i_stride) = bak;
+            }
+
             /* we need to encode this block now (for next ones) */
             h->predict_4x4[a->i_predict4x4[x][y]]( p_dst_by, i_stride );
             x264_mb_encode_i4x4( h, idx, a->i_qp );
@@ -610,6 +627,7 @@
 
             i_best = COST_MAX;
             predict_4x4_mode_available( h->mb.i_neighbour8[idx], predict_mode, &i_max );
+
             for( i = 0; i < i_max; i++ )
             {
                 int i_sad;