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| 1 /* | |
| 2 * Copyright (c) 2016 The WebRTC 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 #include "testing/gtest/include/gtest/gtest.h" | |
| 12 #include "webrtc/modules/video_coding/histogram.h" | |
| 13 | |
| 14 namespace webrtc { | |
| 15 namespace video_coding { | |
| 16 | |
| 17 class TestHistogram : public ::testing::Test { | |
| 18 protected: | |
| 19 TestHistogram() : histogram_(5, 10) {} | |
| 20 Histogram histogram_; | |
| 21 }; | |
| 22 | |
| 23 TEST_F(TestHistogram, NumValues) { | |
| 24 EXPECT_EQ(0ul, histogram_.NumValues()); | |
| 25 histogram_.Add(0); | |
| 26 EXPECT_EQ(1ul, histogram_.NumValues()); | |
| 27 } | |
| 28 | |
| 29 TEST_F(TestHistogram, InverseCdf) { | |
| 30 histogram_.Add(0); | |
| 31 histogram_.Add(1); | |
| 32 histogram_.Add(2); | |
| 33 histogram_.Add(3); | |
| 34 histogram_.Add(4); | |
| 35 EXPECT_EQ(5ul, histogram_.NumValues()); | |
| 36 EXPECT_EQ(1ul, histogram_.InverseCdf(0.2f)); | |
| 37 EXPECT_EQ(2ul, histogram_.InverseCdf(0.2000001f)); | |
| 38 EXPECT_EQ(4ul, histogram_.InverseCdf(0.8f)); | |
| 39 | |
| 40 histogram_.Add(0); | |
| 41 EXPECT_EQ(6ul, histogram_.NumValues()); | |
| 42 EXPECT_EQ(1ul, histogram_.InverseCdf(0.2f)); | |
| 43 EXPECT_EQ(1ul, histogram_.InverseCdf(0.2000001f)); | |
| 44 } | |
| 45 | |
| 46 TEST_F(TestHistogram, ReplaceOldValues) { | |
| 47 histogram_.Add(0); | |
| 48 histogram_.Add(0); | |
| 49 histogram_.Add(0); | |
| 50 histogram_.Add(0); | |
| 51 histogram_.Add(0); | |
| 52 histogram_.Add(1); | |
| 53 histogram_.Add(1); | |
| 54 histogram_.Add(1); | |
| 55 histogram_.Add(1); | |
| 56 histogram_.Add(1); | |
| 57 EXPECT_EQ(10ul, histogram_.NumValues()); | |
| 58 EXPECT_EQ(1ul, histogram_.InverseCdf(0.5f)); | |
| 59 EXPECT_EQ(2ul, histogram_.InverseCdf(0.5000001f)); | |
| 60 | |
| 61 histogram_.Add(4); | |
| 62 histogram_.Add(4); | |
| 63 histogram_.Add(4); | |
| 64 histogram_.Add(4); | |
| 65 EXPECT_EQ(10ul, histogram_.NumValues()); | |
| 66 EXPECT_EQ(1ul, histogram_.InverseCdf(0.1f)); | |
| 67 EXPECT_EQ(2ul, histogram_.InverseCdf(0.5f)); | |
| 68 | |
| 69 histogram_.Add(20); | |
| 70 EXPECT_EQ(10ul, histogram_.NumValues()); | |
| 71 EXPECT_EQ(2ul, histogram_.InverseCdf(0.5f)); | |
| 72 EXPECT_EQ(5ul, histogram_.InverseCdf(0.5000001f)); | |
| 73 } | |
| 74 | |
| 75 } // namespace video_coding | |
| 76 } // namespace webrtc | |
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