2 files changed, 10 insertions, 13 deletions

diff --git a/test2/src/encode.rs b/test2/src/encode.rs
index c120e79..b024c17 100644
--- a/test2/src/encode.rs
+++ b/test2/src/encode.rs
@@ -25,8 +25,8 @@ impl BitstreamFilter for Enc {
         };
 
         let mut out = Vec::new();
-        let mut oldblock = Vec::new();
-        let mut newblock = Vec::new();
+        let mut savblock = Vec::new();
+        let mut refblock = Vec::new();
 
         for by in 0..frame.res.y / BLOCK_SIZE {
             for bx in 0..frame.res.x / BLOCK_SIZE {
@@ -61,20 +61,18 @@ impl BitstreamFilter for Enc {
                     }
                 }
 
-                oldblock.clear();
-                frame.export_block(boff, &mut oldblock);
+                savblock.clear();
+                frame.export_block(boff, &mut savblock);
 
-                Frame::copy_block(&self.last, &mut frame, best_off, boff);
-
-                newblock.clear();
-                frame.export_block(boff, &mut newblock);
+                refblock.clear();
+                self.last.export_block(best_off, &mut refblock);
 
                 let reloff = best_off - boff;
                 out.push((reloff.x + 127) as u8);
                 out.push((reloff.y + 127) as u8);
 
                 for i in 0..(BLOCK_SIZE * BLOCK_SIZE + BLOCK_SIZE * BLOCK_SIZE / 2) {
-                    out.push(newblock[i as usize] - oldblock[i as usize] + 127)
+                    out.push(savblock[i as usize] - refblock[i as usize])
                 }
             }
         }
diff --git a/test2/src/main.rs b/test2/src/main.rs
index 0b69026..aca978e 100644
--- a/test2/src/main.rs
+++ b/test2/src/main.rs
@@ -43,6 +43,7 @@ impl Frame {
             buf.extend(&self.data[y_off as usize..(y_off + BLOCK_SIZE) as usize]);
         }
     }
+    #[allow(unused)]
     fn import_block(&mut self, off: IVec2, buf: &[u8]) -> usize {
         let mut p = 0;
         // Luma
@@ -68,8 +69,7 @@ impl Frame {
             let y_off = off.x + (y + off.y) * self.res.x;
             let i = y * BLOCK_SIZE;
             for x in 0..BLOCK_SIZE {
-                self.data[(y_off + x) as usize] = self.data[(y_off + x) as usize]
-                    .saturating_add_signed(buf[(i + x) as usize] as i8 - 127);
+                self.data[(y_off + x) as usize] += buf[(i + x) as usize] as u8;
             }
         }
         // Chroma
@@ -78,8 +78,7 @@ impl Frame {
             let y_off = uvplane_off + (off.x & !1) + (y + off.y / 2) * self.res.x;
             let i = BLOCK_SIZE * BLOCK_SIZE + y * BLOCK_SIZE;
             for x in 0..BLOCK_SIZE {
-                self.data[(y_off + x) as usize] = self.data[(y_off + x) as usize]
-                    .saturating_add_signed(buf[(i + x) as usize] as i8 - 127);
+                self.data[(y_off + x) as usize] += buf[(i + x) as usize] as u8;
             }
         }
         (BLOCK_SIZE * BLOCK_SIZE + BLOCK_SIZE * BLOCK_SIZE / 2) as usize