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52 lines
1.9 KiB
C++
52 lines
1.9 KiB
C++
// Copyright 2016 The Draco Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#include "core/quantization_utils.h"
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#include "core/draco_test_base.h"
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namespace draco {
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class QuantizationUtilsTest : public ::testing::Test {};
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TEST_F(QuantizationUtilsTest, TestQuantizer) {
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Quantizer quantizer;
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quantizer.Init(10.f, 255);
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EXPECT_EQ(quantizer.QuantizeFloat(0.f), 0);
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EXPECT_EQ(quantizer.QuantizeFloat(10.f), 255);
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EXPECT_EQ(quantizer.QuantizeFloat(-10.f), -255);
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EXPECT_EQ(quantizer.QuantizeFloat(4.999f), 127);
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EXPECT_EQ(quantizer.QuantizeFloat(5.f), 128);
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EXPECT_EQ(quantizer.QuantizeFloat(-4.9999f), -127);
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EXPECT_EQ(quantizer.QuantizeFloat(-5.f), -128);
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EXPECT_EQ(quantizer.QuantizeFloat(-5.0001f), -128);
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// Out of range quantization.
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// The behavior is technically undefined, but both quantizer and dequantizer
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// should still work correctly unless the quantized values overflow.
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EXPECT_LT(quantizer.QuantizeFloat(-15.f), -255);
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EXPECT_GT(quantizer.QuantizeFloat(15.f), 255);
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}
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TEST_F(QuantizationUtilsTest, TestDequantizer) {
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Dequantizer dequantizer;
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dequantizer.Init(10.f, 255);
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EXPECT_EQ(dequantizer.DequantizeFloat(0), 0.f);
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EXPECT_EQ(dequantizer.DequantizeFloat(255), 10.f);
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EXPECT_EQ(dequantizer.DequantizeFloat(-255), -10.f);
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EXPECT_EQ(dequantizer.DequantizeFloat(128), 10.f * (128.f / 255.f));
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}
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} // namespace draco
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