1 files changed, 91 insertions, 0 deletions
diff --git a/third_party/libwebrtc/common_audio/window_generator_unittest.cc b/third_party/libwebrtc/common_audio/window_generator_unittest.cc
new file mode 100644
index 0000000000..cf339327c6
--- /dev/null
+++ b/third_party/libwebrtc/common_audio/window_generator_unittest.cc
@@ -0,0 +1,91 @@
+/*
+ *  Copyright (c) 2014 The WebRTC 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.
+ */
+
+#include "common_audio/window_generator.h"
+
+#include <cstring>
+
+#include "test/gtest.h"
+
+namespace webrtc {
+
+TEST(WindowGeneratorTest, KaiserBesselDerived) {
+  float window[7];
+
+  memset(window, 0, sizeof(window));
+
+  WindowGenerator::KaiserBesselDerived(0.397856f, 2, window);
+  ASSERT_NEAR(window[0], 0.707106f, 1e-6f);
+  ASSERT_NEAR(window[1], 0.707106f, 1e-6f);
+  ASSERT_NEAR(window[2], 0.0f, 1e-6f);
+  ASSERT_NEAR(window[3], 0.0f, 1e-6f);
+  ASSERT_NEAR(window[4], 0.0f, 1e-6f);
+  ASSERT_NEAR(window[5], 0.0f, 1e-6f);
+  ASSERT_NEAR(window[6], 0.0f, 1e-6f);
+
+  WindowGenerator::KaiserBesselDerived(0.397856f, 3, window);
+  ASSERT_NEAR(window[0], 0.598066f, 1e-6f);
+  ASSERT_NEAR(window[1], 0.922358f, 1e-6f);
+  ASSERT_NEAR(window[2], 0.598066f, 1e-6f);
+  ASSERT_NEAR(window[3], 0.0f, 1e-6f);
+  ASSERT_NEAR(window[4], 0.0f, 1e-6f);
+  ASSERT_NEAR(window[5], 0.0f, 1e-6f);
+  ASSERT_NEAR(window[6], 0.0f, 1e-6f);
+
+  WindowGenerator::KaiserBesselDerived(0.397856f, 6, window);
+  ASSERT_NEAR(window[0], 0.458495038865344f, 1e-6f);
+  ASSERT_NEAR(window[1], 0.707106781186548f, 1e-6f);
+  ASSERT_NEAR(window[2], 0.888696967101760f, 1e-6f);
+  ASSERT_NEAR(window[3], 0.888696967101760f, 1e-6f);
+  ASSERT_NEAR(window[4], 0.707106781186548f, 1e-6f);
+  ASSERT_NEAR(window[5], 0.458495038865344f, 1e-6f);
+  ASSERT_NEAR(window[6], 0.0f, 1e-6f);
+}
+
+TEST(WindowGeneratorTest, Hanning) {
+  float window[7];
+
+  memset(window, 0, sizeof(window));
+
+  window[0] = -1.0f;
+  window[1] = -1.0f;
+  WindowGenerator::Hanning(2, window);
+  ASSERT_NEAR(window[0], 0.0f, 1e-6f);
+  ASSERT_NEAR(window[1], 0.0f, 1e-6f);
+  ASSERT_NEAR(window[2], 0.0f, 1e-6f);
+  ASSERT_NEAR(window[3], 0.0f, 1e-6f);
+  ASSERT_NEAR(window[4], 0.0f, 1e-6f);
+  ASSERT_NEAR(window[5], 0.0f, 1e-6f);
+  ASSERT_NEAR(window[6], 0.0f, 1e-6f);
+
+  window[0] = -1.0f;
+  window[2] = -1.0f;
+  WindowGenerator::Hanning(3, window);
+  ASSERT_NEAR(window[0], 0.0f, 1e-6f);
+  ASSERT_NEAR(window[1], 1.0f, 1e-6f);
+  ASSERT_NEAR(window[2], 0.0f, 1e-6f);
+  ASSERT_NEAR(window[3], 0.0f, 1e-6f);
+  ASSERT_NEAR(window[4], 0.0f, 1e-6f);
+  ASSERT_NEAR(window[5], 0.0f, 1e-6f);
+  ASSERT_NEAR(window[6], 0.0f, 1e-6f);
+
+  window[0] = -1.0f;
+  window[5] = -1.0f;
+  WindowGenerator::Hanning(6, window);
+  ASSERT_NEAR(window[0], 0.0f, 1e-6f);
+  ASSERT_NEAR(window[1], 0.345491f, 1e-6f);
+  ASSERT_NEAR(window[2], 0.904508f, 1e-6f);
+  ASSERT_NEAR(window[3], 0.904508f, 1e-6f);
+  ASSERT_NEAR(window[4], 0.345491f, 1e-6f);
+  ASSERT_NEAR(window[5], 0.0f, 1e-6f);
+  ASSERT_NEAR(window[6], 0.0f, 1e-6f);
+}
+
+}  // namespace webrtc