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) && (img1->d_w == img2->d_w) && 24 (img1->d_h == img2->d_h)); 25 26 const unsigned int width_y = img1->d_w; 27 const unsigned int height_y = img1->d_h; 28 unsigned int i, j; 29 30 int64_t sqrerr = 0; 31 for (i = 0; i < height_y; ++i) { 32 for (j = 0; j < width_y; ++j) { 33 int64_t d = img1->planes[VPX_PLANE_Y][i * img1->stride[VPX_PLANE_Y] + j] - 34 img2->planes[VPX_PLANE_Y][i * img2->stride[VPX_PLANE_Y] + j]; 35 sqrerr += d * d; 36 } 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_ 47
