1 files changed, 48 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/test/util.h b/media/libvpx/libvpx/test/util.h
new file mode 100644
index 0000000000..985f487094
--- /dev/null
+++ b/media/libvpx/libvpx/test/util.h
@@ -0,0 +1,48 @@
+/*
+ *  Copyright (c) 2012 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.
+ */
+
+#ifndef VPX_TEST_UTIL_H_
+#define VPX_TEST_UTIL_H_
+
+#include <stdio.h>
+#include <math.h>
+#include <tuple>
+
+#include "third_party/googletest/src/include/gtest/gtest.h"
+#include "vpx/vpx_image.h"
+
+// Macros
+#define GET_PARAM(k) std::get<k>(GetParam())
+
+inline double compute_psnr(const vpx_image_t *img1, const vpx_image_t *img2) {
+  assert((img1->fmt == img2->fmt) && (img1->d_w == img2->d_w) &&
+         (img1->d_h == img2->d_h));
+
+  const unsigned int width_y = img1->d_w;
+  const unsigned int height_y = img1->d_h;
+  unsigned int i, j;
+
+  int64_t sqrerr = 0;
+  for (i = 0; i < height_y; ++i) {
+    for (j = 0; j < width_y; ++j) {
+      int64_t d = img1->planes[VPX_PLANE_Y][i * img1->stride[VPX_PLANE_Y] + j] -
+                  img2->planes[VPX_PLANE_Y][i * img2->stride[VPX_PLANE_Y] + j];
+      sqrerr += d * d;
+    }
+  }
+  double mse = static_cast<double>(sqrerr) / (width_y * height_y);
+  double psnr = 100.0;
+  if (mse > 0.0) {
+    psnr = 10 * log10(255.0 * 255.0 / mse);
+  }
+  return psnr;
+}
+
+#endif  // VPX_TEST_UTIL_H_