57daeb7ac7
This is a reland of 0cbcba7ea0dced1a7f353c64d6cf91d46ccb29f9. Original change's description: > Moved congestion controller to task queue. > > The goal of this work is to make it easier to experiment with the > bandwidth estimation implementation. For this reason network control > functionality is moved from SendSideCongestionController(SSCC), > PacedSender and BitrateController to the newly created > GoogCcNetworkController which implements the newly created > NetworkControllerInterface. This allows the implementation to be > replaced at runtime in the future. > > This is the first part of a split of a larger CL, see: > https://webrtc-review.googlesource.com/c/src/+/39788/8 > For further explanations. > > Bug: webrtc:8415 > Change-Id: I770189c04cc31b313bd4e57821acff55fbcb1ad3 > Reviewed-on: https://webrtc-review.googlesource.com/43840 > Commit-Queue: Sebastian Jansson <srte@webrtc.org> > Reviewed-by: Björn Terelius <terelius@webrtc.org> > Reviewed-by: Stefan Holmer <stefan@webrtc.org> > Cr-Commit-Position: refs/heads/master@{#21868} Bug: webrtc:8415 Change-Id: I1d1756a30deed5b421b1c91c1918a13b6bb455da Reviewed-on: https://webrtc-review.googlesource.com/48000 Reviewed-by: Stefan Holmer <stefan@webrtc.org> Commit-Queue: Sebastian Jansson <srte@webrtc.org> Cr-Commit-Position: refs/heads/master@{#21899}
67 lines
2.2 KiB
C++
67 lines
2.2 KiB
C++
/*
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* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "modules/pacing/interval_budget.h"
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#include <algorithm>
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namespace webrtc {
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namespace {
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constexpr int kWindowMs = 500;
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}
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IntervalBudget::IntervalBudget(int initial_target_rate_kbps)
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: IntervalBudget(initial_target_rate_kbps, false) {}
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IntervalBudget::IntervalBudget(int initial_target_rate_kbps,
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bool can_build_up_underuse)
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: bytes_remaining_(0), can_build_up_underuse_(can_build_up_underuse) {
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set_target_rate_kbps(initial_target_rate_kbps);
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}
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void IntervalBudget::set_target_rate_kbps(int target_rate_kbps) {
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target_rate_kbps_ = target_rate_kbps;
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max_bytes_in_budget_ = (kWindowMs * target_rate_kbps_) / 8;
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bytes_remaining_ = std::min(std::max(-max_bytes_in_budget_, bytes_remaining_),
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max_bytes_in_budget_);
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}
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void IntervalBudget::IncreaseBudget(int64_t delta_time_ms) {
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int bytes = target_rate_kbps_ * delta_time_ms / 8;
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if (bytes_remaining_ < 0 || can_build_up_underuse_) {
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// We overused last interval, compensate this interval.
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bytes_remaining_ = std::min(bytes_remaining_ + bytes, max_bytes_in_budget_);
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} else {
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// If we underused last interval we can't use it this interval.
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bytes_remaining_ = std::min(bytes, max_bytes_in_budget_);
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}
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}
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void IntervalBudget::UseBudget(size_t bytes) {
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bytes_remaining_ = std::max(bytes_remaining_ - static_cast<int>(bytes),
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-max_bytes_in_budget_);
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}
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size_t IntervalBudget::bytes_remaining() const {
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return static_cast<size_t>(std::max(0, bytes_remaining_));
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}
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int IntervalBudget::budget_level_percent() const {
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if (max_bytes_in_budget_ == 0)
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return 0;
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return bytes_remaining_ * 100 / max_bytes_in_budget_;
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}
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int IntervalBudget::target_rate_kbps() const {
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return target_rate_kbps_;
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}
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} // namespace webrtc
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