X-Git-Url: https://git.nihav.org/?a=blobdiff_plain;f=nihav-duck%2Fsrc%2Fcodecs%2Fvp78dsp.rs;h=9d68616aac029da7d28b581ee234593de1d10b1b;hb=e6aaad5c5273cd814b5748b7faf3751835a37217;hp=04545bd40754b64c6cdd26e3f6353c04294a02a8;hpb=0cc75664f579f511681ee7000741484a1d849061;p=nihav.git

diff --git a/nihav-duck/src/codecs/vp78dsp.rs b/nihav-duck/src/codecs/vp78dsp.rs
index 04545bd..9d68616 100644
--- a/nihav-duck/src/codecs/vp78dsp.rs
+++ b/nihav-duck/src/codecs/vp78dsp.rs
@@ -129,6 +129,13 @@ pub trait IntraPred {
             off += stride;
         }
     }
+    fn ipred_const(dst: &mut [u8], off: usize, stride: usize, dc: u8) {
+        for row in dst[off..].chunks_mut(stride).take(Self::SIZE) {
+            for el in row[..Self::SIZE].iter_mut() {
+                *el = dc;
+            }
+        }
+    }
 }
 
 pub struct IPred16x16 {}
@@ -223,7 +230,6 @@ macro_rules! load_pred4 {
 pub struct IPred4x4 {}
 impl IPred4x4 {
     pub fn ipred_dc(dst: &mut [u8], mut off: usize, stride: usize, ipred: &IPredContext) {
-        let dc;
         let mut dcsum = 0;
         for el in ipred.left.iter().take(4) {
             dcsum += u16::from(*el);
@@ -231,7 +237,7 @@ impl IPred4x4 {
         for el in ipred.top.iter().take(4) {
             dcsum += u16::from(*el);
         }
-        dc = ((dcsum + (1 << 2)) >> 3) as u8;
+        let dc = ((dcsum + (1 << 2)) >> 3) as u8;
         for _ in 0..4 {
             let out = &mut dst[off..][..4];
             for el in out.iter_mut() {
@@ -390,7 +396,7 @@ fn mc_block_common(dst: &mut [u8], mut doff: usize, dstride: usize, src: &[u8],
         let dst = &mut dst[doff..];
         let src = &src[EDGE_PRE + EDGE_PRE * sstride..];
         for (out, src) in dst.chunks_mut(dstride).take(size).zip(src.chunks(sstride)) {
-            (&mut out[0..size]).copy_from_slice(&src[0..size]);
+            out[..size].copy_from_slice(&src[..size]);
         }
     } else if my == 0 {
         let src = &src[EDGE_PRE * sstride..];
@@ -433,7 +439,7 @@ fn mc_block(dst: &mut [u8], doff: usize, dstride: usize, xpos: usize, ypos: usiz
         let src = &reffrm.get_data();
         let src = &src[srcoff..];
         for (out, src) in dst.chunks_mut(dstride).take(size).zip(src.chunks(sstride)) {
-            (&mut out[0..size]).copy_from_slice(&src[0..size]);
+            out[..size].copy_from_slice(&src[..size]);
         }
         return;
     }
@@ -506,7 +512,7 @@ pub fn mc_block_special(dst: &mut [u8], doff: usize, dstride: usize, xpos: usize
             (&data[off + (start_x as usize) + (start_y as usize) * stride..],
              ((stride as isize) + xstep) as usize)
         } else {
-            let add = (size + EDGE_PRE + EDGE_POST) * (xstep.abs() as usize);
+            let add = (size + EDGE_PRE + EDGE_POST) * xstep.unsigned_abs();
             let bw = size + EDGE_PRE + EDGE_POST + add;
             let bh = (end_y - start_y) as usize;
             let bo = if xstep >= 0 { 0 } else { add };