X-Git-Url: https://git.nihav.org/?a=blobdiff_plain;f=nihav-duck%2Fsrc%2Fcodecs%2Fvpcommon.rs;h=bd7d1cf49066df5e99ea8d61ac501686c378e3b3;hb=3cc76ad5da2772a179d6933695e84ec9212f84c2;hp=562a9a2601dcbaf0c4d09983e4312b39390baf74;hpb=587a6d789be865f24bd31ef65aabf1b9d5809965;p=nihav.git

diff --git a/nihav-duck/src/codecs/vpcommon.rs b/nihav-duck/src/codecs/vpcommon.rs
index 562a9a2..bd7d1cf 100644
--- a/nihav-duck/src/codecs/vpcommon.rs
+++ b/nihav-duck/src/codecs/vpcommon.rs
@@ -68,6 +68,9 @@ impl VPShuffler {
             None
         }
     }
+    pub fn has_refs(&self) -> bool {
+        self.lastframe.is_some()
+    }
 }
 
 pub const VP56_COEF_BASE: [i16; 6] = [ 5, 7, 11, 19, 35, 67 ];
@@ -429,21 +432,33 @@ fn vp3_interp10(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, bw:
     }
 }
 
-fn vp3_interp11(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, bw: usize, bh: usize)
+fn vp3_interp1x(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, bw: usize, bh: usize)
 {
     let mut didx = 0;
     let mut sidx = 0;
     for _ in 0..bh {
         for x in 0..bw {
             dst[didx + x] = (((src[sidx + x] as u16) +
-                              (src[sidx + x + 1] as u16) +
-                              (src[sidx + x + sstride] as u16) +
-                              (src[sidx + x + sstride + 1] as u16)) >> 2) as u8;
+                              (src[sidx + x + sstride + 1] as u16)) >> 1) as u8;
+        }
+        didx += dstride;
+        sidx += sstride;
+    }
+}
+
+fn vp3_interp1y(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, bw: usize, bh: usize)
+{
+    let mut didx = 0;
+    let mut sidx = 0;
+    for _ in 0..bh {
+        for x in 0..bw {
+            dst[didx + x] = (((src[sidx + x + 1] as u16) +
+                              (src[sidx + x + sstride] as u16)) >> 1) as u8;
         }
         didx += dstride;
         sidx += sstride;
     }
 }
 
-pub const VP3_INTERP_FUNCS: &[blockdsp::BlkInterpFunc] = &[ vp3_interp00, vp3_interp01, vp3_interp10, vp3_interp11 ];
+pub const VP3_INTERP_FUNCS: &[blockdsp::BlkInterpFunc] = &[ vp3_interp00, vp3_interp01, vp3_interp10, vp3_interp1x, vp3_interp1y ];