libvpx: Add VP9 decoder.

source/libvpx/vp8/encoder/bitstream.c

Index: source/libvpx/vp8/encoder/bitstream.c
===================================================================
--- source/libvpx/vp8/encoder/bitstream.c	(revision 172621)
+++ source/libvpx/vp8/encoder/bitstream.c	(working copy)
@@ -118,7 +118,7 @@
 
         update_mode(
             w, VP8_YMODES, vp8_ymode_encodings, vp8_ymode_tree,
-            Pnew, x->fc.ymode_prob, bct, (unsigned int *)cpi->mb.ymode_count
+            Pnew, x->fc.ymode_prob, bct, (unsigned int *)cpi->ymode_count
         );
     }
     {
@@ -127,7 +127,7 @@
 
         update_mode(
             w, VP8_UV_MODES, vp8_uv_mode_encodings, vp8_uv_mode_tree,
-            Pnew, x->fc.uv_mode_prob, bct, (unsigned int *)cpi->mb.uv_mode_count
+            Pnew, x->fc.uv_mode_prob, bct, (unsigned int *)cpi->uv_mode_count
         );
     }
 }
@@ -539,7 +539,7 @@
     {
         int total_mbs = pc->mb_rows * pc->mb_cols;
 
-        prob_skip_false = (total_mbs - cpi->mb.skip_true_count ) * 256 / total_mbs;
+        prob_skip_false = (total_mbs - cpi->skip_true_count ) * 256 / total_mbs;
 
         if (prob_skip_false <= 1)
             prob_skip_false = 1;
@@ -730,7 +730,7 @@
     {
         int total_mbs = c->mb_rows * c->mb_cols;
 
-        prob_skip_false = (total_mbs - cpi->mb.skip_true_count ) * 256 / total_mbs;
+        prob_skip_false = (total_mbs - cpi->skip_true_count ) * 256 / total_mbs;
 
         if (prob_skip_false <= 1)
             prob_skip_false = 1;
@@ -851,7 +851,6 @@
 
 static int independent_coef_context_savings(VP8_COMP *cpi)
 {
-    MACROBLOCK *const x = & cpi->mb;
     int savings = 0;
     int i = 0;
     do
@@ -868,7 +867,7 @@
              */
 
             probs = (const unsigned int (*)[MAX_ENTROPY_TOKENS])
-                x->coef_counts[i][j];
+                                                    cpi->coef_counts[i][j];
 
             /* Reset to default probabilities at key frames */
             if (cpi->common.frame_type == KEY_FRAME)
@@ -927,7 +926,6 @@
 
 static int default_coef_context_savings(VP8_COMP *cpi)
 {
-    MACROBLOCK *const x = & cpi->mb;
     int savings = 0;
     int i = 0;
     do
@@ -947,7 +945,7 @@
                     MAX_ENTROPY_TOKENS, vp8_coef_encodings, vp8_coef_tree,
                     cpi->frame_coef_probs [i][j][k],
                     cpi->frame_branch_ct [i][j][k],
-                    x->coef_counts [i][j][k],
+                    cpi->coef_counts [i][j][k],
                     256, 1
                 );