shithub: libvpx

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Optimize the read_partition.

Change-Id: I5a796425ce5706824a2fc17c6f24f983c5b9e43b

--- a/vp9/common/vp9_onyxc_int.h

+++ b/vp9/common/vp9_onyxc_int.h

@@ -417,20 +417,11 @@

                                           BLOCK_SIZE bsize) {

   const PARTITION_CONTEXT *above_ctx = xd->above_seg_context + mi_col;

   const PARTITION_CONTEXT *left_ctx = xd->left_seg_context + (mi_row & MI_MASK);

-

   const int bsl = mi_width_log2_lookup[bsize];

-  const int bs = 1 << bsl;

-  int above = 0, left = 0, i;

+  int above = (*above_ctx >> bsl) & 1 , left = (*left_ctx >> bsl) & 1;

   assert(b_width_log2_lookup[bsize] == b_height_log2_lookup[bsize]);

   assert(bsl >= 0);

-

-  for (i = 0; i < bs; i++) {

-    above |= above_ctx[i];

-    left |= left_ctx[i];

-  }

-  above = (above & bs) > 0;

-  left  = (left & bs) > 0;

   return (left * 2 + above) + bsl * PARTITION_PLOFFSET;

 }