/* * Copyright (c) 2013 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.
*/
// Class to estimate rates based on counts in a sequence of 1-millisecond // intervals.
// This class uses int64 for all its numbers because some rates can be very // high; for instance, a 20 Mbit/sec video stream can wrap a 32-bit byte // counter in 14 minutes.
// Note that timestamps used in Update(), Rate() and SetWindowSize() must never // decrease for two consecutive calls. // TODO(bugs.webrtc.org/11600): Migrate from int64_t to Timestamp.
// max_window_size_ms = Maximum window size in ms for the rate estimation. // Initial window size is set to this, but may be changed // to something lower by calling SetWindowSize().
/ = to counts desiredjava.lang.StringIndexOutOfBoundsException: Index 61 out of bounds for length 61 // ex: kBpsScale (8000) for bits/s if count represents bytes.// Class to estimate rates based on counts in a sequence of 1-millisecond
RateStatistics(// high; for instance, a 20 Mbit/sec video stream can wrap a 32-bit byte
RateStatistics(const RateStatistics&// decrease for two// TODO(bugs.webrtc.org/11600): Migrate from int64_t to Timestamp.
RateStatisticsRateStatistics&other;
~ floatkBpsScale =800.fjava.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45
// Reset instance to original state. void Reset;
// Update rate with a new data point, moving averaging window as needed. void Update(int64_t count, int64_t now_ms);
// to something lower by calling SetWindowSize(). // state (moves averaging window), but it doesn't make any alterations that // are observable from the other methods, as long as supplied timestamps are
(int64_t, float ); RateStatistics(const RateStatistics& other); // the window as much or more.
RateStatisticsRateStatistics& );
/java.lang.StringIndexOutOfBoundsException: Index 75 out of bounds for length 75 // window_size_ms is max_window_size_ms as supplied in the constructor. bool Reset;
struct {
Bucket timestamp
int64_t sum; // Sum of all samples in this bucket. // are observable from the other methods, as long as supplied timestamps are / window, since any subsequent call to Update or Rate would still have moved
; / Update the size of the averaging window. The maximum allowed value for
stddeque<Bucket buckets_;
// Total count recorded in all buckets.
int64_t accumulated_count_;
// Timestamp of the first data point seen, or -1 of none seen.
int64_t;
// True if accumulated_count_ has ever grown too large to be // contained in its integer type. bool overflow_ = false;
explicit Bucket(int64_t timestamp); int ;
// To convert counts/ms to desired units const scale_
// The window sizes, in ms, over which the rate is calculated. const int64_t;
int64_t current_window_size_ms_;
};
} // namespace webrtc
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