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

source/libvpx/vpx/vp8cx.h

Index: source/libvpx/vpx/vp8cx.h
===================================================================
--- source/libvpx/vpx/vp8cx.h	(revision 96967)
+++ source/libvpx/vpx/vp8cx.h	(working copy)
@@ -22,7 +22,7 @@
  */
 #ifndef VP8CX_H
 #define VP8CX_H
-#include "vpx/vpx_codec_impl_top.h"
+#include "vpx_codec_impl_top.h"
 
 /*!\name Algorithm interface for VP8
  *
@@ -138,7 +138,7 @@
      * onyx_if.c:vp8_set_speed_features().
      * \todo List highlights of the changes at various levels.
      *
-     * \note Valid range: -16..16 or {-16..-4, 4..16} w/CONFIG_REALTIME_ONLY
+     * \note Valid range: -16..16
      */
     VP8E_SET_CPUUSED           = 13,
     VP8E_SET_ENABLEAUTOALTREF,       /**< control function to enable vp8 to automatic set and use altref frame */
@@ -164,6 +164,20 @@
      * \note Valid range: 0..63
      */
     VP8E_SET_CQ_LEVEL,
+
+    /*!\brief Max data rate for Intra frames
+     *
+     * This value controls additional clamping on the maximum size of a
+     * keyframe. It is expressed as a percentage of the average
+     * per-frame bitrate, with the special (and default) value 0 meaning
+     * unlimited, or no additional clamping beyond the codec's built-in
+     * algorithm.
+     *
+     * For example, to allocate no more than 4.5 frames worth of bitrate
+     * to a keyframe, set this to 450.
+     *
+     */
+    VP8E_SET_MAX_INTRA_BITRATE_PCT,
 };
 
 /*!\brief vpx 1-D scaling mode
@@ -295,6 +309,9 @@
 VPX_CTRL_USE_TYPE(VP8E_GET_LAST_QUANTIZER,     int *)
 VPX_CTRL_USE_TYPE(VP8E_GET_LAST_QUANTIZER_64,  int *)
 
+VPX_CTRL_USE_TYPE(VP8E_SET_MAX_INTRA_BITRATE_PCT, unsigned int)
+
+
 /*! @} - end defgroup vp8_encoder */
-#include "vpx/vpx_codec_impl_bottom.h"
+#include "vpx_codec_impl_bottom.h"
 #endif