Context-pred fix to not use top/left on edges

This fix resolves some of the mismatch issues being seen
recently. While this is the right thing to do when tiling
is used for this experiment, it is not the underlying cause
of the the mismatches.
Something else is causing writing outside of the allowable
frame area in the encoder leading to this mismatch.

Change-Id: If52c6f67555aa18ab8762865384e323b47237277

diff --git a/vp9/common/vp9_reconintra.h b/vp9/common/vp9_reconintra.h
index 3031fb6..b97b608 100644 (file)
--- a/vp9/common/vp9_reconintra.h
+++ b/vp9/common/vp9_reconintra.h
@@ -17,9 +17,10 @@
 void vp9_recon_intra_mbuv(MACROBLOCKD *xd);
 
 B_PREDICTION_MODE vp9_find_dominant_direction(uint8_t *ptr,
-                                              int stride, int n);
+                                              int stride, int n,
+                                              int tx, int ty);
 
-B_PREDICTION_MODE vp9_find_bpred_context(BLOCKD *x);
+B_PREDICTION_MODE vp9_find_bpred_context(MACROBLOCKD *xd, BLOCKD *x);
 
 #if CONFIG_COMP_INTERINTRA_PRED
 void vp9_build_interintra_16x16_predictors_mb(MACROBLOCKD *xd,

diff --git a/vp9/common/vp9_reconintra4x4.c b/vp9/common/vp9_reconintra4x4.c
index 7fbee7c..eab5ab4 100644 (file)
--- a/vp9/common/vp9_reconintra4x4.c
+++ b/vp9/common/vp9_reconintra4x4.c
@@ -15,17 +15,17 @@
 #include "vp9_rtcd.h"
 
 #if CONFIG_NEWBINTRAMODES
-static int find_grad_measure(uint8_t *x, int stride, int n, int t,
+static int find_grad_measure(uint8_t *x, int stride, int n, int tx, int ty,
                              int dx, int dy) {
   int i, j;
   int count = 0, gsum = 0, gdiv;
   /* TODO: Make this code more efficient by breaking up into two loops */
-  for (i = -t; i < n; ++i)
-    for (j = -t; j < n; ++j) {
+  for (i = -ty; i < n; ++i)
+    for (j = -tx; j < n; ++j) {
       int g;
       if (i >= 0 && j >= 0) continue;
       if (i + dy >= 0 && j + dx >= 0) continue;
-      if (i + dy < -t || i + dy >= n || j + dx < -t || j + dx >= n) continue;
+      if (i + dy < -ty || i + dy >= n || j + dx < -tx || j + dx >= n) continue;
       g = abs(x[(i + dy) * stride + j + dx] - x[i * stride + j]);
       gsum += g * g;
       count++;
@@ -36,14 +36,15 @@ static int find_grad_measure(uint8_t *x, int stride, int n, int t,
 
 #if CONTEXT_PRED_REPLACEMENTS == 6
 B_PREDICTION_MODE vp9_find_dominant_direction(uint8_t *ptr,
-                                              int stride, int n) {
+                                              int stride, int n,
+                                              int tx, int ty) {
   int g[8], i, imin, imax;
-  g[1] = find_grad_measure(ptr, stride, n, 4,  2, 1);
-  g[2] = find_grad_measure(ptr, stride, n, 4,  1, 1);
-  g[3] = find_grad_measure(ptr, stride, n, 4,  1, 2);
-  g[5] = find_grad_measure(ptr, stride, n, 4, -1, 2);
-  g[6] = find_grad_measure(ptr, stride, n, 4, -1, 1);
-  g[7] = find_grad_measure(ptr, stride, n, 4, -2, 1);
+  g[1] = find_grad_measure(ptr, stride, n, tx, ty,  2, 1);
+  g[2] = find_grad_measure(ptr, stride, n, tx, ty,  1, 1);
+  g[3] = find_grad_measure(ptr, stride, n, tx, ty,  1, 2);
+  g[5] = find_grad_measure(ptr, stride, n, tx, ty, -1, 2);
+  g[6] = find_grad_measure(ptr, stride, n, tx, ty, -1, 1);
+  g[7] = find_grad_measure(ptr, stride, n, tx, ty, -2, 1);
   imin = 1;
   for (i = 2; i < 8; i += 1 + (i == 3))
     imin = (g[i] < g[imin] ? i : imin);
@@ -73,12 +74,13 @@ B_PREDICTION_MODE vp9_find_dominant_direction(uint8_t *ptr,
 }
 #elif CONTEXT_PRED_REPLACEMENTS == 4
 B_PREDICTION_MODE vp9_find_dominant_direction(uint8_t *ptr,
-                                              int stride, int n) {
+                                              int stride, int n,
+                                              int tx, int ty) {
   int g[8], i, imin, imax;
-  g[1] = find_grad_measure(ptr, stride, n, 4,  2, 1);
-  g[3] = find_grad_measure(ptr, stride, n, 4,  1, 2);
-  g[5] = find_grad_measure(ptr, stride, n, 4, -1, 2);
-  g[7] = find_grad_measure(ptr, stride, n, 4, -2, 1);
+  g[1] = find_grad_measure(ptr, stride, n, tx, ty,  2, 1);
+  g[3] = find_grad_measure(ptr, stride, n, tx, ty,  1, 2);
+  g[5] = find_grad_measure(ptr, stride, n, tx, ty, -1, 2);
+  g[7] = find_grad_measure(ptr, stride, n, tx, ty, -2, 1);
   imin = 1;
   for (i = 3; i < 8; i+=2)
     imin = (g[i] < g[imin] ? i : imin);
@@ -104,16 +106,17 @@ B_PREDICTION_MODE vp9_find_dominant_direction(uint8_t *ptr,
 }
 #elif CONTEXT_PRED_REPLACEMENTS == 0
 B_PREDICTION_MODE vp9_find_dominant_direction(uint8_t *ptr,
-                                              int stride, int n) {
+                                              int stride, int n,
+                                              int tx, int ty) {
   int g[8], i, imin, imax;
-  g[0] = find_grad_measure(ptr, stride, n, 4,  1, 0);
-  g[1] = find_grad_measure(ptr, stride, n, 4,  2, 1);
-  g[2] = find_grad_measure(ptr, stride, n, 4,  1, 1);
-  g[3] = find_grad_measure(ptr, stride, n, 4,  1, 2);
-  g[4] = find_grad_measure(ptr, stride, n, 4,  0, 1);
-  g[5] = find_grad_measure(ptr, stride, n, 4, -1, 2);
-  g[6] = find_grad_measure(ptr, stride, n, 4, -1, 1);
-  g[7] = find_grad_measure(ptr, stride, n, 4, -2, 1);
+  g[0] = find_grad_measure(ptr, stride, n, tx, ty,  1, 0);
+  g[1] = find_grad_measure(ptr, stride, n, tx, ty,  2, 1);
+  g[2] = find_grad_measure(ptr, stride, n, tx, ty,  1, 1);
+  g[3] = find_grad_measure(ptr, stride, n, tx, ty,  1, 2);
+  g[4] = find_grad_measure(ptr, stride, n, tx, ty,  0, 1);
+  g[5] = find_grad_measure(ptr, stride, n, tx, ty, -1, 2);
+  g[6] = find_grad_measure(ptr, stride, n, tx, ty, -1, 1);
+  g[7] = find_grad_measure(ptr, stride, n, tx, ty, -2, 1);
   imax = 0;
   for (i = 1; i < 8; i++)
     imax = (g[i] > g[imax] ? i : imax);
@@ -144,10 +147,17 @@ B_PREDICTION_MODE vp9_find_dominant_direction(uint8_t *ptr,
 }
 #endif
 
-B_PREDICTION_MODE vp9_find_bpred_context(BLOCKD *x) {
+B_PREDICTION_MODE vp9_find_bpred_context(MACROBLOCKD *xd, BLOCKD *x) {
+  const int block_idx = x - xd->block;
+  const int have_top = (block_idx >> 2) || xd->up_available;
+  const int have_left = (block_idx & 3)  || xd->left_available;
   uint8_t *ptr = *(x->base_dst) + x->dst;
   int stride = x->dst_stride;
-  return vp9_find_dominant_direction(ptr, stride, 4);
+  int tx = have_left ? 4 : 0;
+  int ty = have_top ? 4 : 0;
+  if (!have_left && !have_top)
+    return B_DC_PRED;
+  return vp9_find_dominant_direction(ptr, stride, 4, tx, ty);
 }
 #endif
 

diff --git a/vp9/decoder/vp9_decodframe.c b/vp9/decoder/vp9_decodframe.c
index 572ba29..0459bb9 100644 (file)
--- a/vp9/decoder/vp9_decodframe.c
+++ b/vp9/decoder/vp9_decodframe.c
@@ -361,7 +361,7 @@ static void decode_4x4(VP9D_COMP *pbi, MACROBLOCKD *xd,
       int b_mode = xd->mode_info_context->bmi[i].as_mode.first;
 #if CONFIG_NEWBINTRAMODES
       xd->mode_info_context->bmi[i].as_mode.context = b->bmi.as_mode.context =
-          vp9_find_bpred_context(b);
+          vp9_find_bpred_context(xd, b);
 #endif
       if (!xd->mode_info_context->mbmi.mb_skip_coeff)
         eobtotal += vp9_decode_coefs_4x4(pbi, xd, bc, PLANE_TYPE_Y_WITH_DC, i);

diff --git a/vp9/encoder/vp9_encodeintra.c b/vp9/encoder/vp9_encodeintra.c
index 3c98d4a..9e5bcea 100644 (file)
--- a/vp9/encoder/vp9_encodeintra.c
+++ b/vp9/encoder/vp9_encodeintra.c
@@ -44,7 +44,7 @@ void vp9_encode_intra4x4block(MACROBLOCK *x, int ib) {
   TX_TYPE tx_type;
 
 #if CONFIG_NEWBINTRAMODES
-  b->bmi.as_mode.context = vp9_find_bpred_context(b);
+  b->bmi.as_mode.context = vp9_find_bpred_context(&x->e_mbd, b);
 #endif
 
   vp9_intra4x4_predict(&x->e_mbd, b, b->bmi.as_mode.first, b->predictor);

diff --git a/vp9/encoder/vp9_rdopt.c b/vp9/encoder/vp9_rdopt.c
index 3004d6b..d212243 100644 (file)
--- a/vp9/encoder/vp9_rdopt.c
+++ b/vp9/encoder/vp9_rdopt.c
@@ -1168,7 +1168,7 @@ static int64_t rd_pick_intra4x4block(VP9_COMP *cpi, MACROBLOCK *x, BLOCK *be,
   DECLARE_ALIGNED_ARRAY(16, int16_t, best_dqcoeff, 16);
 
 #if CONFIG_NEWBINTRAMODES
-  b->bmi.as_mode.context = vp9_find_bpred_context(b);
+  b->bmi.as_mode.context = vp9_find_bpred_context(xd, b);
 #endif
   xd->mode_info_context->mbmi.txfm_size = TX_4X4;
   for (mode = B_DC_PRED; mode < LEFT4X4; mode++) {
@@ -1279,7 +1279,7 @@ static int64_t rd_pick_intra4x4mby_modes(VP9_COMP *cpi, MACROBLOCK *mb,
       bmode_costs  = mb->bmode_costs[A][L];
     }
 #if CONFIG_NEWBINTRAMODES
-    mic->bmi[i].as_mode.context = vp9_find_bpred_context(xd->block + i);
+    mic->bmi[i].as_mode.context = vp9_find_bpred_context(xd, xd->block + i);
 #endif
 
     total_rd += rd_pick_intra4x4block(