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1 /* | 1 /* |
2 * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 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 | 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 | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
11 #ifndef WEBRTC_BASE_NUMERICS_EXP_FILTER_H_ | 11 #ifndef WEBRTC_RTC_BASE_NUMERICS_EXP_FILTER_H_ |
12 #define WEBRTC_BASE_NUMERICS_EXP_FILTER_H_ | 12 #define WEBRTC_RTC_BASE_NUMERICS_EXP_FILTER_H_ |
13 | 13 |
14 namespace rtc { | 14 namespace rtc { |
15 | 15 |
16 // This class can be used, for example, for smoothing the result of bandwidth | 16 // This class can be used, for example, for smoothing the result of bandwidth |
17 // estimation and packet loss estimation. | 17 // estimation and packet loss estimation. |
18 | 18 |
19 class ExpFilter { | 19 class ExpFilter { |
20 public: | 20 public: |
21 static const float kValueUndefined; | 21 static const float kValueUndefined; |
22 | 22 |
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38 // Changes the filter factor base to the given value |alpha|. | 38 // Changes the filter factor base to the given value |alpha|. |
39 void UpdateBase(float alpha); | 39 void UpdateBase(float alpha); |
40 | 40 |
41 private: | 41 private: |
42 float alpha_; // Filter factor base. | 42 float alpha_; // Filter factor base. |
43 float filtered_; // Current filter output. | 43 float filtered_; // Current filter output. |
44 const float max_; | 44 const float max_; |
45 }; | 45 }; |
46 } // namespace rtc | 46 } // namespace rtc |
47 | 47 |
48 #endif // WEBRTC_BASE_NUMERICS_EXP_FILTER_H_ | 48 #endif // WEBRTC_RTC_BASE_NUMERICS_EXP_FILTER_H_ |
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