commit 9f61a83bf9201be73083dd09fbb67f93955f4ac2
author Fritz Koenig <frkoenig@google.com> Fri Oct 29 17:09:33 2010 -0700
committer Fritz Koenig <frkoenig@google.com> Mon Nov 01 13:27:13 2010 -0700
tree c31232cbdcd858a15e6a8027f205494884fad896
parent 0684c647ef38e81396567720e6fe5a1190e3c103

postproc : Added SPLITMV visualization, fix line constrain.

Now draw 16 vectors for SPLITMV mode.

Fixed constrain line to block divide by zero issues.

Blend block was not centering the shaded area correctly.

Change-Id: I1edabd8b4e553aac8d980f7b45c80159e9202434

vp8/common/postproc.c

diff --git a/vp8/common/postproc.c b/vp8/common/postproc.c
index 6f41943..d7044fd 100644
--- a/vp8/common/postproc.c
+++ b/vp8/common/postproc.c
@@ -484,7 +484,7 @@
     int u1_const = u1*((1<<16)-alpha);
     int v1_const = v1*((1<<16)-alpha);
 
-    y += stride + 2;
+    y += stride + 1;
     for (i = 0; i < 14; i++)
     {
         for (j = 0; j < 14; j++)
@@ -522,7 +522,7 @@
         dy = *y1 - y0;
 
         *x1 = width;
-        if (dy)
+        if (dx)
             *y1 = ((width-x0)*dy)/dx + y0;
     }
     if (*x1 < 0)
@@ -531,7 +531,7 @@
         dy = *y1 - y0;
 
         *x1 = 0;
-        if (dy)
+        if (dx)
             *y1 = ((0-x0)*dy)/dx + y0;
     }
     if (*y1 > height)
@@ -540,7 +540,7 @@
         dy = *y1 - y0;
 
         *y1 = height;
-        if (dx)
+        if (dy)
             *x1 = ((height-y0)*dx)/dy + x0;
     }
     if (*y1 < 0)
@@ -549,7 +549,7 @@
         dy = *y1 - y0;
 
         *y1 = 0;
-        if (dx)
+        if (dy)
             *x1 = ((0-y0)*dx)/dy + x0;
     }
 }
@@ -753,8 +753,36 @@
         {
             for (x0 = 8; x0 < (width + 8); x0 += 16)
             {
-               int x1, y1;
-               if (mi->mbmi.mode >= NEARESTMV)
+                int x1, y1;
+
+                if (mi->mbmi.mode == SPLITMV)
+                {
+                    int bx0, by0;
+
+                    B_MODE_INFO *bmi = mi->bmi;
+                    MV *mv = &bmi->mv.as_mv;
+
+                    for (by0 = (y0-8); by0 < y0+8; by0 += 4)
+                    {
+                        for (bx0 = (x0-8); bx0 < x0+8; bx0 += 4)
+                        {
+
+                            x1 = bx0 + (mv->col >> 3);
+                            y1 = by0 + (mv->row >> 3);
+
+                            if (x1 != bx0 && y1 != by0)
+                            {
+                                constrain_line (bx0, &x1, by0, &y1, width, height);
+                                vp8_blit_line  (bx0,  x1, by0,  y1, y_buffer, y_stride);
+                            }
+                            else
+                                vp8_blit_line  (bx0,  x1, by0,  y1, y_buffer, y_stride);
+
+                            mv++;
+                        }
+                    }
+                }
+                else if (mi->mbmi.mode >= NEARESTMV)
                 {
                     MV *mv = &mi->mbmi.mv.as_mv;