shithub: libvpx

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vp9_reconintra: specialize d117 4x4

based on webp's VR4()

Change-Id: Ic8c0b8ed65a63772ca0a4321592880a5e8947db5

--- a/vp9/common/vp9_reconintra.c

+++ b/vp9/common/vp9_reconintra.c

@@ -485,6 +485,29 @@

 }

 intra_pred_no_4x4(d45)

+void vp9_d117_predictor_4x4_c(uint8_t *dst, ptrdiff_t stride,

+                              const uint8_t *above, const uint8_t *left) {

+  const int I = left[0];

+  const int J = left[1];

+  const int K = left[2];

+  const int X = above[-1];

+  const int A = above[0];

+  const int B = above[1];

+  const int C = above[2];

+  const int D = above[3];

+  DST(0, 0) = DST(1, 2) = AVG2(X, A);

+  DST(1, 0) = DST(2, 2) = AVG2(A, B);

+  DST(2, 0) = DST(3, 2) = AVG2(B, C);

+  DST(3, 0)             = AVG2(C, D);

+

+  DST(0, 3) =             AVG3(K, J, I);

+  DST(0, 2) =             AVG3(J, I, X);

+  DST(0, 1) = DST(1, 3) = AVG3(I, X, A);

+  DST(1, 1) = DST(2, 3) = AVG3(X, A, B);

+  DST(2, 1) = DST(3, 3) = AVG3(A, B, C);

+  DST(3, 1) =             AVG3(B, C, D);

+}

+

 static INLINE void d117_predictor(uint8_t *dst, ptrdiff_t stride, int bs,

                                   const uint8_t *above, const uint8_t *left) {

   int r, c;

@@ -513,7 +536,7 @@

     dst += stride;

   }

 }

-intra_pred_allsizes(d117)

+intra_pred_no_4x4(d117)

 static INLINE void d135_predictor(uint8_t *dst, ptrdiff_t stride, int bs,

                                   const uint8_t *above, const uint8_t *left) {