shithub: libvpx

Info  •  Files  •  Log  •  Branches

vp9_reconintra: specialize d63 4x4

based on webp's VL4()

Change-Id: Ibab962053843eae8752b4e74b6481a53bb034ae9

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

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

@@ -361,6 +361,7 @@

 #define DST(x, y) dst[(x) + (y) * stride]

 #define AVG3(a, b, c) (((a) + 2 * (b) + (c) + 2) >> 2)

+#define AVG2(a, b) (((a) + (b) + 1) >> 1)

 static INLINE void d207_predictor(uint8_t *dst, ptrdiff_t stride, int bs,

                                   const uint8_t *above, const uint8_t *left) {

@@ -391,6 +392,30 @@

 }

 intra_pred_allsizes(d207)

+void vp9_d63_predictor_4x4_c(uint8_t *dst, ptrdiff_t stride,

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

+  const int A = above[0];

+  const int B = above[1];

+  const int C = above[2];

+  const int D = above[3];

+  const int E = above[4];

+  const int F = above[5];

+  const int G = above[6];

+  const int H = above[7];

+  (void)left;

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

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

+  DST(2, 0) = DST(1, 2) = AVG2(C, D);

+  DST(3, 0) = DST(2, 2) = AVG2(D, E);

+

+  DST(0, 1) =             AVG3(A, B, C);

+  DST(1, 1) = DST(0, 3) = AVG3(B, C, D);

+  DST(2, 1) = DST(1, 3) = AVG3(C, D, E);

+  DST(3, 1) = DST(2, 3) = AVG3(D, E, F);

+              DST(3, 2) = AVG3(E, F, G);

+              DST(3, 3) = AVG3(F, G, H);

+}

+

 static INLINE void d63_predictor(uint8_t *dst, ptrdiff_t stride, int bs,

                                  const uint8_t *above, const uint8_t *left) {

   int r, c;

@@ -405,7 +430,7 @@

     dst += stride;

   }

 }

-intra_pred_allsizes(d63)

+intra_pred_no_4x4(d63)

 void vp9_d45_predictor_4x4_c(uint8_t *dst, ptrdiff_t stride,

                              const uint8_t *above, const uint8_t *left) {