test/util.h

   1 /*
   2  *  Copyright (c) 2012 The WebM project authors. All Rights Reserved.
   3  *
   4  *  Use of this source code is governed by a BSD-style license
   5  *  that can be found in the LICENSE file in the root of the source
   6  *  tree. An additional intellectual property rights grant can be found
   7  *  in the file PATENTS.  All contributing project authors may
   8  *  be found in the AUTHORS file in the root of the source tree.
   9  */
  10
  11 #ifndef TEST_UTIL_H_
  12 #define TEST_UTIL_H_
  13
  14 #include <stdio.h>
  15 #include <math.h>
  16 #include "third_party/googletest/src/include/gtest/gtest.h"
  17 #include "vpx/vpx_image.h"
  18
  19 // Macros
  20 #define GET_PARAM(k) std::tr1::get< k >(GetParam())
  21
  22 inline double compute_psnr(const vpx_image_t *img1, const vpx_image_t *img2) {
  23   assert((img1->fmt == img2->fmt) &&
  24          (img1->d_w == img2->d_w) &&
  25          (img1->d_h == img2->d_h));
  26
  27   const unsigned int width_y  = img1->d_w;
  28   const unsigned int height_y = img1->d_h;
  29   unsigned int i, j;
  30
  31   int64_t sqrerr = 0;
  32   for (i = 0; i < height_y; ++i)
  33     for (j = 0; j < width_y; ++j) {
  34       int64_t d = img1->planes[VPX_PLANE_Y][i * img1->stride[VPX_PLANE_Y] + j] -
  35                   img2->planes[VPX_PLANE_Y][i * img2->stride[VPX_PLANE_Y] + j];
  36       sqrerr += d * d;
  37     }
  38   double mse = static_cast<double>(sqrerr) / (width_y * height_y);
  39   double psnr = 100.0;
  40   if (mse > 0.0) {
  41     psnr = 10 * log10(255.0 * 255.0 / mse);
  42   }
  43   return psnr;
  44 }
  45
  46 #endif  // TEST_UTIL_H_