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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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