Commit 7012ba63 by James Zern

### vp9_reconintra: simplify d63_predictor

```calculate the averages needed for even and odd rows once; this removes a
conditional from the inner loop
the final average calculated currently relies on above[] being extended,
it could be reduced to use
above[block_size - 2] + 3 * above[block_size - 1]

Change-Id: I70f5eac8d8a2a959c7114844a95826f445c3dd4d```
parent dc07cc6f
 ... ... @@ -425,13 +425,17 @@ void vp9_d63_predictor_4x4_c(uint8_t *dst, ptrdiff_t stride, static INLINE void d63_predictor(uint8_t *dst, ptrdiff_t stride, int bs, const uint8_t *above, const uint8_t *left) { int r, c; (void) left; for (r = 0; r < bs; ++r) { for (c = 0; c < bs; ++c) dst[c] = r & 1 ? AVG3(above[(r >> 1) + c], above[(r >> 1) + c + 1], above[(r >> 1) + c + 2]) : AVG2(above[(r >> 1) + c], above[(r >> 1) + c + 1]); dst += stride; int size; (void)left; for (c = 0; c < bs; ++c) { dst[c] = AVG2(above[c], above[c + 1]); dst[stride + c] = AVG3(above[c], above[c + 1], above[c + 2]); } for (r = 2, size = bs - 2; r < bs; r += 2, --size) { memcpy(dst + (r + 0) * stride, dst + (r >> 1), size); memset(dst + (r + 0) * stride + size, above[bs - 1], bs - size); memcpy(dst + (r + 1) * stride, dst + stride + (r >> 1), size); memset(dst + (r + 1) * stride + size, above[bs - 1], bs - size); } } intra_pred_no_4x4(d63) ... ...
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