--- libav-0.8_a/libavcodec/smacker.c    2012-01-11 11:43:04.000000000 +0100
+++ libav-0.8_b/libavcodec/smacker.c    2012-03-30 14:38:37.422892997 +0200
@@ -673,8 +673,8 @@
                 else
                     res = 0;
                 val |= h[3].values[res] << 8;
-                pred[1] += sign_extend(val, 16);
-                *samples++ = av_clip_int16(pred[1]);
+                pred[1] += (int16_t)val;
+                *samples++ = pred[1];
             } else {
                 if(vlc[0].table)
                     res = get_vlc2(&gb, vlc[0].table, SMKTREE_BITS, 3);
@@ -686,8 +686,8 @@
                 else
                     res = 0;
                 val |= h[1].values[res] << 8;
-                pred[0] += sign_extend(val, 16);
-                *samples++ = av_clip_int16(pred[0]);
+                pred[0] += val;
+                *samples++ = pred[0];
             }
         }
     } else { //8-bit data
@@ -701,15 +701,15 @@
                     res = get_vlc2(&gb, vlc[1].table, SMKTREE_BITS, 3);
                 else
                     res = 0;
-                pred[1] += sign_extend(h[1].values[res], 8);
-                *samples8++ = av_clip_uint8(pred[1]);
+                pred[1] += (int8_t)h[1].values[res]; /*sign_extend(h[1].values[res], 8);*/
+                *samples8++ = pred[1]; /*av_clip_uint8(pred[1]);*/
             } else {
                 if(vlc[0].table)
                     res = get_vlc2(&gb, vlc[0].table, SMKTREE_BITS, 3);
                 else
                     res = 0;
-                pred[0] += sign_extend(h[0].values[res], 8);
-                *samples8++ = av_clip_uint8(pred[0]);
+                pred[0] += (int8_t)h[0].values[res]; /*sign_extend(h[0].values[res], 8);*/
+                *samples8++ = pred[0]; /*av_clip_uint8(pred[0]);*/
             }
         }
     }