Update libvpx snapshot to v0.9.7-p1 (Cayuga).

source/libvpx/vp8/encoder/boolhuff.h

Index: source/libvpx/vp8/encoder/boolhuff.h
===================================================================
--- source/libvpx/vp8/encoder/boolhuff.h	(revision 96967)
+++ source/libvpx/vp8/encoder/boolhuff.h	(working copy)
@@ -19,6 +19,7 @@
 #ifndef __INC_BOOLHUFF_H
 #define __INC_BOOLHUFF_H
 
+#include "vpx_ports/mem.h"
 
 typedef struct
 {
@@ -35,9 +36,77 @@
 } BOOL_CODER;
 
 extern void vp8_start_encode(BOOL_CODER *bc, unsigned char *buffer);
-extern void vp8_encode_bool(BOOL_CODER *bc, int x, int context);
+
 extern void vp8_encode_value(BOOL_CODER *br, int data, int bits);
 extern void vp8_stop_encode(BOOL_CODER *bc);
 extern const unsigned int vp8_prob_cost[256];
 
+
+DECLARE_ALIGNED(16, extern const unsigned char, vp8_norm[256]);
+
+
+static void vp8_encode_bool(BOOL_CODER *br, int bit, int probability)
+{
+    unsigned int split;
+    int count = br->count;
+    unsigned int range = br->range;
+    unsigned int lowvalue = br->lowvalue;
+    register unsigned int shift;
+
+#ifdef ENTROPY_STATS
+#if defined(SECTIONBITS_OUTPUT)
+
+    if (bit)
+        Sectionbits[active_section] += vp8_prob_cost[255-probability];
+    else
+        Sectionbits[active_section] += vp8_prob_cost[probability];
+
 #endif
+#endif
+
+    split = 1 + (((range - 1) * probability) >> 8);
+
+    range = split;
+
+    if (bit)
+    {
+        lowvalue += split;
+        range = br->range - split;
+    }
+
+    shift = vp8_norm[range];
+
+    range <<= shift;
+    count += shift;
+
+    if (count >= 0)
+    {
+        int offset = shift - count;
+
+        if ((lowvalue << (offset - 1)) & 0x80000000)
+        {
+            int x = br->pos - 1;
+
+            while (x >= 0 && br->buffer[x] == 0xff)
+            {
+                br->buffer[x] = (unsigned char)0;
+                x--;
+            }
+
+            br->buffer[x] += 1;
+        }
+
+        br->buffer[br->pos++] = (lowvalue >> (24 - offset));
+        lowvalue <<= offset;
+        shift = count;
+        lowvalue &= 0xffffff;
+        count -= 8 ;
+    }
+
+    lowvalue <<= shift;
+    br->count = count;
+    br->lowvalue = lowvalue;
+    br->range = range;
+}
+
+#endif