libvpx: Pull from upstream

source/libvpx/vpx_dsp/fastssim.c

 /*
  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  *
  *  This code was originally written by: Nathan E. Egge, at the Daala
  *  project.
  */
 #include <math.h>
+#include <stdlib.h>
 #include <string.h>
 #include "./vpx_config.h"
-#include "./vp9_rtcd.h"
-#include "vp9/encoder/vp9_ssim.h"
+#include "./vpx_dsp_rtcd.h"
+#include "vpx_dsp/ssim.h"
+#include "vpx_ports/system_state.h"
 /* TODO(jbb): High bit depth version of this code needed */
 typedef struct fs_level fs_level;
 typedef struct fs_ctx fs_ctx;
 
 #define SSIM_C1 (255 * 255 * 0.01 * 0.01)
 #define SSIM_C2 (255 * 255 * 0.03 * 0.03)
 
 #define FS_MINI(_a, _b) ((_a) < (_b) ? (_a) : (_b))
 #define FS_MAXI(_a, _b) ((_a) > (_b) ? (_a) : (_b))
 
@@ skipping 408 matching lines @@
   fs_apply_luminance(&ctx, l);
   ret *= fs_average(&ctx, l);
   fs_ctx_clear(&ctx);
   return ret;
 }
 
 static double convert_ssim_db(double _ssim, double _weight) {
   return 10 * (log10(_weight) - log10(_weight - _ssim));
 }
 
-double vp9_calc_fastssim(YV12_BUFFER_CONFIG *source, YV12_BUFFER_CONFIG *dest,
+double vpx_calc_fastssim(const YV12_BUFFER_CONFIG *source,
+                         const YV12_BUFFER_CONFIG *dest,
                          double *ssim_y, double *ssim_u, double *ssim_v) {
   double ssimv;
-  vp9_clear_system_state();
+  vpx_clear_system_state();
 
   *ssim_y = calc_ssim(source->y_buffer, source->y_stride, dest->y_buffer,
                       dest->y_stride, source->y_crop_width,
                       source->y_crop_height);
 
   *ssim_u = calc_ssim(source->u_buffer, source->uv_stride, dest->u_buffer,
                       dest->uv_stride, source->uv_crop_width,
                       source->uv_crop_height);
 
   *ssim_v = calc_ssim(source->v_buffer, source->uv_stride, dest->v_buffer,
                       dest->uv_stride, source->uv_crop_width,
                       source->uv_crop_height);
   ssimv = (*ssim_y) * .8 + .1 * ((*ssim_u) + (*ssim_v));
 
   return convert_ssim_db(ssimv, 1.0);
 }