diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /third_party/libwebrtc/rtc_base/numerics/exp_filter.h | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/libwebrtc/rtc_base/numerics/exp_filter.h')
-rw-r--r-- | third_party/libwebrtc/rtc_base/numerics/exp_filter.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/third_party/libwebrtc/rtc_base/numerics/exp_filter.h b/third_party/libwebrtc/rtc_base/numerics/exp_filter.h new file mode 100644 index 0000000000..6bded80d02 --- /dev/null +++ b/third_party/libwebrtc/rtc_base/numerics/exp_filter.h @@ -0,0 +1,48 @@ +/* + * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#ifndef RTC_BASE_NUMERICS_EXP_FILTER_H_ +#define RTC_BASE_NUMERICS_EXP_FILTER_H_ + +namespace rtc { + +// This class can be used, for example, for smoothing the result of bandwidth +// estimation and packet loss estimation. + +class ExpFilter { + public: + static const float kValueUndefined; + + explicit ExpFilter(float alpha, float max = kValueUndefined) : max_(max) { + Reset(alpha); + } + + // Resets the filter to its initial state, and resets filter factor base to + // the given value `alpha`. + void Reset(float alpha); + + // Applies the filter with a given exponent on the provided sample: + // y(k) = min(alpha_^ exp * y(k-1) + (1 - alpha_^ exp) * sample, max_). + float Apply(float exp, float sample); + + // Returns current filtered value. + float filtered() const { return filtered_; } + + // Changes the filter factor base to the given value `alpha`. + void UpdateBase(float alpha); + + private: + float alpha_; // Filter factor base. + float filtered_; // Current filter output. + const float max_; +}; +} // namespace rtc + +#endif // RTC_BASE_NUMERICS_EXP_FILTER_H_ |