Fix a couple of minor bugs in vp10_has_right and vp10_has_bottom

The above-right and left-bottom pixels were sometimes not used even
though they are available. Results on lowres_all and hdres_all are
mostly neutral.

Change-Id: Ic13533dd498442ad5592b83bb5fabf053cc8e8f0

diff --git a/vp10/common/reconintra.c b/vp10/common/reconintra.c
index 4a79466d0a86ffafeacc05db5c1074885f22da9b..e2ab95254ea5ac69607e947e524b46394aede82e 100644 (file)
--- a/vp10/common/reconintra.c
+++ b/vp10/common/reconintra.c
@@ -107,6 +107,10 @@ static int vp10_has_right(BLOCK_SIZE bsize, int mi_row, int mi_col,
   const int w = VPXMAX(num_4x4_blocks_wide_lookup[bsize] >> ss_x, 1);
   const int step = 1 << txsz;
 
+  // Handle block size 4x8 and 4x4
+  if (ss_x == 0 && num_4x4_blocks_wide_lookup[bsize] < 2 && x == 0)
+    return 1;
+
   if (y == 0) {
     const int hl = mi_height_log2_lookup[bsize];
     const uint8_t *order = orders[bsize];
@@ -144,6 +148,13 @@ static int vp10_has_bottom(BLOCK_SIZE bsize, int mi_row, int mi_col,
     const uint8_t *order = orders[bsize];
     int my_order, bl_order;
 
+    // Handle block size 8x4 and 4x4
+    if (ss_y == 0 && num_4x4_blocks_high_lookup[bsize] < 2 && y == 0)
+      return 1;
+
+    if (y + step < h)
+      return 1;
+
     mi_row = (mi_row & 7) >> hl;
     mi_col = (mi_col & 7) >> wl;
 
@@ -154,9 +165,6 @@ static int vp10_has_bottom(BLOCK_SIZE bsize, int mi_row, int mi_col,
     if (((mi_row + 1) << hl) >= 8)
       return 0;
 
-    if (y + step < h)
-      return 1;
-
     my_order = order[((mi_row + 0) << (3 - wl)) + mi_col + 0];
     bl_order = order[((mi_row + 1) << (3 - wl)) + mi_col - 1];