vp10: split UV int4x4 loopfilter flag in one for each covered edge.

In practice, this fixes the issue that if you have an odd number of
mi_cols, on the full right of the image, the UV int4x4 loopfilter
will be skipped over odd cols as well as odd rows (because it holds a
single variable for both edges).

See issue 1016.

Change-Id: Id53b501cbff9323a8239ed4775ae01fe91874b7e

vp10/common/loopfilter.c

@@ -719,7 +719,11 @@ static void build_masks(const loop_filter_info_n *const lfi_n,
   uint64_t *const int_4x4_y = &lfm->int_4x4_y;
   uint16_t *const left_uv = &lfm->left_uv[tx_size_uv];
   uint16_t *const above_uv = &lfm->above_uv[tx_size_uv];
+#if CONFIG_MISC_FIXES
+  uint16_t *const int_4x4_uv = &lfm->left_int_4x4_uv;
+#else
   uint16_t *const int_4x4_uv = &lfm->int_4x4_uv;
+#endif
   int i;
 
   // If filter level is 0 we don't loop filter.
@@ -1015,7 +1019,11 @@ void vp10_setup_mask(VP10_COMMON *const cm, const int mi_row, const int mi_col,
       lfm->above_uv[i] &= mask_uv;
     }
     lfm->int_4x4_y &= mask_y;
+#if CONFIG_MISC_FIXES
+    lfm->above_int_4x4_uv = lfm->left_int_4x4_uv & mask_uv;
+#else
     lfm->int_4x4_uv &= mask_uv;
+#endif
 
     // We don't apply a wide loop filter on the last uv block row. If set
     // apply the shorter one instead.
@@ -1049,7 +1057,11 @@ void vp10_setup_mask(VP10_COMMON *const cm, const int mi_row, const int mi_col,
       lfm->above_uv[i] &= mask_uv;
     }
     lfm->int_4x4_y &= mask_y;
+#if CONFIG_MISC_FIXES
+    lfm->left_int_4x4_uv &= mask_uv_int;
+#else
     lfm->int_4x4_uv &= mask_uv_int;
+#endif
 
     // We don't apply a wide loop filter on the last uv column. If set
     // apply the shorter one instead.
@@ -1079,7 +1091,11 @@ void vp10_setup_mask(VP10_COMMON *const cm, const int mi_row, const int mi_col,
   assert(!(lfm->left_uv[TX_16X16]&lfm->left_uv[TX_8X8]));
   assert(!(lfm->left_uv[TX_16X16] & lfm->left_uv[TX_4X4]));
   assert(!(lfm->left_uv[TX_8X8] & lfm->left_uv[TX_4X4]));
+#if CONFIG_MISC_FIXES
+  assert(!(lfm->left_int_4x4_uv & lfm->left_uv[TX_16X16]));
+#else
   assert(!(lfm->int_4x4_uv & lfm->left_uv[TX_16X16]));
+#endif
   assert(!(lfm->above_y[TX_16X16] & lfm->above_y[TX_8X8]));
   assert(!(lfm->above_y[TX_16X16] & lfm->above_y[TX_4X4]));
   assert(!(lfm->above_y[TX_8X8] & lfm->above_y[TX_4X4]));
@@ -1087,7 +1103,11 @@ void vp10_setup_mask(VP10_COMMON *const cm, const int mi_row, const int mi_col,
   assert(!(lfm->above_uv[TX_16X16] & lfm->above_uv[TX_8X8]));
   assert(!(lfm->above_uv[TX_16X16] & lfm->above_uv[TX_4X4]));
   assert(!(lfm->above_uv[TX_8X8] & lfm->above_uv[TX_4X4]));
+#if CONFIG_MISC_FIXES
+  assert(!(lfm->above_int_4x4_uv & lfm->above_uv[TX_16X16]));
+#else
   assert(!(lfm->int_4x4_uv & lfm->above_uv[TX_16X16]));
+#endif
 }
 
 static void filter_selectively_vert(uint8_t *s, int pitch,
@@ -1442,7 +1462,11 @@ void vp10_filter_block_plane_ss11(VP10_COMMON *const cm,
   uint16_t mask_16x16 = lfm->left_uv[TX_16X16];
   uint16_t mask_8x8 = lfm->left_uv[TX_8X8];
   uint16_t mask_4x4 = lfm->left_uv[TX_4X4];
+#if CONFIG_MISC_FIXES
+  uint16_t mask_4x4_int = lfm->left_int_4x4_uv;
+#else
   uint16_t mask_4x4_int = lfm->int_4x4_uv;
+#endif
 
   assert(plane->subsampling_x == 1 && plane->subsampling_y == 1);
 
@@ -1494,7 +1518,11 @@ void vp10_filter_block_plane_ss11(VP10_COMMON *const cm,
   mask_16x16 = lfm->above_uv[TX_16X16];
   mask_8x8 = lfm->above_uv[TX_8X8];
   mask_4x4 = lfm->above_uv[TX_4X4];
+#if CONFIG_MISC_FIXES
+  mask_4x4_int = lfm->above_int_4x4_uv;
+#else
   mask_4x4_int = lfm->int_4x4_uv;
+#endif
 
   for (r = 0; r < MI_BLOCK_SIZE && mi_row + r < cm->mi_rows; r += 2) {
     const int skip_border_4x4_r = mi_row + r == cm->mi_rows - 1;

vp10/common/loopfilter.h

@@ -80,7 +80,12 @@ typedef struct {
   uint64_t int_4x4_y;
   uint16_t left_uv[TX_SIZES];
   uint16_t above_uv[TX_SIZES];
+#if CONFIG_MISC_FIXES
+  uint16_t left_int_4x4_uv;
+  uint16_t above_int_4x4_uv;
+#else
   uint16_t int_4x4_uv;
+#endif
   uint8_t lfl_y[64];
   uint8_t lfl_uv[16];
 } LOOP_FILTER_MASK;