/* * Copyright 2012 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.
*/
// Limits the rate of use to a certain maximum quantity per period of // time. Use, for example, for simple bandwidth throttling. // // It's implemented like a diet plan: You have so many calories per // day. If you hit the limit, you can't eat any more until the next // day. class RTC_EXPORT DataRateLimiter { public: // For example, 100kb per second.
DataRateLimiter(size_t max, double period)
: max_per_period_(max),
period_length_(period),
used_in_period_(0),
period_start_(0.0),
period_end_(period) {} virtual ~DataRateLimiter() {}
// Returns true if if the desired quantity is available in the // current period (< (max - used)). Once the given time passes the // end of the period, used is set to zero and more use is available. bool CanUse(size_t desired, double time); // Increment the quantity used this period. If past the end of a // period, a new period is started. void Use(size_t used, double time);
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