1 files changed, 132 insertions, 0 deletions
diff --git a/src/3rdparty/resonance-audio/resonance_audio/dsp/distance_attenuation_test.cc b/src/3rdparty/resonance-audio/resonance_audio/dsp/distance_attenuation_test.cc
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index 000000000..6bccfcabf
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+++ b/src/3rdparty/resonance-audio/resonance_audio/dsp/distance_attenuation_test.cc
@@ -0,0 +1,132 @@
+/*
+Copyright 2018 Google Inc. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS-IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+#include "dsp/distance_attenuation.h"
+
+#include "third_party/googletest/googletest/include/gtest/gtest.h"
+#include "base/constants_and_types.h"
+#include "base/misc_math.h"
+
+namespace vraudio {
+
+namespace {
+
+// Tests the logarithmic distance attenuation method against the pre-computed
+// results.
+TEST(DistanceAttenuationTest, ComputeLogarithmicDistanceAttenuationTest) {
+  const WorldPosition kListenerPosition(0.0f, 3.0f, 0.0f);
+  const WorldPosition kSourcePosition(0.0f, 0.0f, -4.0f);
+  const float kMinDistance_low = 1.0f;
+  const float kMinDistance_high = 10.0f;
+  const float kMaxDistance_low = 3.0f;
+  const float kMaxDistance_high = 500.0f;
+  const float kExpectedAttenuation_a = 0.1983967f;
+  const float kExpectedAttenuation_b = 0.0f;
+  const float kExpectedAttenuation_c = 1.0f;
+
+  float attenuation = ComputeLogarithmicDistanceAttenuation(
+      kListenerPosition, kSourcePosition, kMinDistance_low, kMaxDistance_high);
+  EXPECT_NEAR(kExpectedAttenuation_a, attenuation, kEpsilonFloat);
+
+  // Test for the case where the source is beyond the maximum distance.
+  attenuation = ComputeLogarithmicDistanceAttenuation(
+      kListenerPosition, kSourcePosition, kMinDistance_low, kMaxDistance_low);
+  EXPECT_NEAR(kExpectedAttenuation_b, attenuation, kEpsilonFloat);
+
+  // Test for the case where the source is within the minimum distance.
+  attenuation = ComputeLogarithmicDistanceAttenuation(
+      kListenerPosition, kSourcePosition, kMinDistance_high, kMaxDistance_high);
+  EXPECT_NEAR(kExpectedAttenuation_c, attenuation, kEpsilonFloat);
+}
+
+// Tests the linear distance attenuation method against the pre-computed
+// results.
+TEST(DistanceAttenuationTest, ComputeLinearDistanceAttenuationTest) {
+  const WorldPosition kListenerPosition(0.0f, 3.0f, 0.0f);
+  const WorldPosition kSourcePosition(0.0f, 0.0f, -4.0f);
+  const float kMinDistance_low = 1.0f;
+  const float kMinDistance_high = 10.0f;
+  const float kMaxDistance_low = 3.0f;
+  const float kMaxDistance_high = 8.0f;
+  const float kExpectedAttenuation_a = 0.4285714f;
+  const float kExpectedAttenuation_b = 0.0f;
+  const float kExpectedAttenuation_c = 1.0f;
+
+  float attenuation = ComputeLinearDistanceAttenuation(
+      kListenerPosition, kSourcePosition, kMinDistance_low, kMaxDistance_high);
+  EXPECT_NEAR(kExpectedAttenuation_a, attenuation, kEpsilonFloat);
+
+  // Test for the case where the source is beyond the maximum distance.
+  attenuation = ComputeLinearDistanceAttenuation(
+      kListenerPosition, kSourcePosition, kMinDistance_low, kMaxDistance_low);
+  EXPECT_NEAR(kExpectedAttenuation_b, attenuation, kEpsilonFloat);
+
+  // Test for the case where the source is within the minimum distance.
+  attenuation = ComputeLinearDistanceAttenuation(
+      kListenerPosition, kSourcePosition, kMinDistance_high, kMaxDistance_high);
+  EXPECT_NEAR(kExpectedAttenuation_c, attenuation, kEpsilonFloat);
+}
+
+// Tests the gain attenuations update method against the pre-computed results.
+TEST(DistanceAttenuationTest, UpdateAttenuationParametersTest) {
+  const float kMasterGain = 0.5f;
+  const float kReflectionsGain = 0.5f;
+  const float kReverbGain = 2.0f;
+  const WorldPosition kListenerPosition(0.0f, 0.0f, 0.0f);
+  const WorldPosition kSourcePosition(0.0f, 0.0f, 1.5f);
+  const float kDistanceAttenuation = 0.2f;
+  const float kRoomEffectsGain = 0.25f;
+
+  // Initialize new |SourceParameters| with an explicit distance attenuation
+  // value to avoid extra complexity.
+  SourceParameters parameters;
+  parameters.distance_rolloff_model = DistanceRolloffModel::kNone;
+  parameters.distance_attenuation = kDistanceAttenuation;
+  parameters.object_transform.position = kSourcePosition;
+  parameters.room_effects_gain = kRoomEffectsGain;
+  // Update the gain attenuation parameters.
+  UpdateAttenuationParameters(kMasterGain, kReflectionsGain, kReverbGain,
+                              kListenerPosition, &parameters);
+  // Check the attenuation parameters against the pre-computed values.
+  const size_t num_attenuations =
+      static_cast<size_t>(AttenuationType::kNumAttenuationTypes);
+  const float kExpectedAttenuations[num_attenuations] = {0.5f, 0.1f, 0.0125f,
+                                                         0.25f};
+  for (size_t i = 0; i < num_attenuations; ++i) {
+    EXPECT_NEAR(kExpectedAttenuations[i], parameters.attenuations[i],
+                kEpsilonFloat)
+        << "Attenuation " << i;
+  }
+}
+
+// Tests the near field effects gain computation method against the pre-computed
+// results.
+TEST(NearFieldEffectTest, ComputeNearFieldEffectTest) {
+  const WorldPosition kListenerPosition(0.0f, 3.0f, 0.0f);
+  const WorldPosition kSourcePosition_a(0.0f, 0.0f, -4.0f);
+  const WorldPosition kSourcePosition_b(0.0f, 2.5f, 0.0f);
+  const float kExpectedGain_a = 0.0f;
+  const float kExpectedGain_b = 1.0f;
+
+  float gain = ComputeNearFieldEffectGain(kListenerPosition, kSourcePosition_a);
+  EXPECT_NEAR(kExpectedGain_a, gain, kEpsilonFloat);
+  gain = ComputeNearFieldEffectGain(kListenerPosition, kSourcePosition_b);
+  EXPECT_NEAR(kExpectedGain_b, gain, kEpsilonFloat);
+}
+
+}  // namespace
+
+}  // namespace vraudio