74aaf29a0f
The filter is an exponential filter borrowed from video coding module. The method is written in a new class called PacketLossProtector (not sure if the name is nice), which can be used in the future for more sophisticated logic. BUG= R=henrika@webrtc.org, stefan@webrtc.org Review URL: https://webrtc-codereview.appspot.com/20809004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@6709 4adac7df-926f-26a2-2b94-8c16560cd09d
38 lines
1.2 KiB
C++
38 lines
1.2 KiB
C++
/*
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* Copyright (c) 2014 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 "webrtc/voice_engine/network_predictor.h"
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namespace webrtc {
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namespace voe {
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NetworkPredictor::NetworkPredictor(Clock* clock)
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: clock_(clock),
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last_loss_rate_update_time_ms_(clock_->TimeInMilliseconds()),
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loss_rate_filter_(new rtc::ExpFilter(0.9999f)) {
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}
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void NetworkPredictor::UpdatePacketLossRate(uint8_t loss_rate) {
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int64_t now_ms = clock_->TimeInMilliseconds();
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// Update the recursive average filter.
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loss_rate_filter_->Apply(
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static_cast<float>(now_ms - last_loss_rate_update_time_ms_),
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static_cast<float>(loss_rate));
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last_loss_rate_update_time_ms_ = now_ms;
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}
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uint8_t NetworkPredictor::GetLossRate() {
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float value = loss_rate_filter_->filtered();
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return (value == rtc::ExpFilter::kValueUndefined) ? 0 :
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static_cast<uint8_t>(value + 0.5);
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}
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} // namespace voe
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} // namespace webrtc
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