1 /* 2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #include "webrtc/voice_engine/network_predictor.h" 12 13 namespace webrtc { 14 namespace voe { 15 16 NetworkPredictor::NetworkPredictor(Clock* clock) 17 : clock_(clock), 18 last_loss_rate_update_time_ms_(clock_->TimeInMilliseconds()), 19 loss_rate_filter_(new rtc::ExpFilter(0.9999f)) { 20 } 21 22 uint8_t NetworkPredictor::GetLossRate() { 23 float value = loss_rate_filter_->filtered(); 24 return (value == rtc::ExpFilter::kValueUndefined) ? 0 : 25 static_cast<uint8_t>(value + 0.5); 26 } 27 28 void NetworkPredictor::UpdatePacketLossRate(uint8_t loss_rate) { 29 int64_t now_ms = clock_->TimeInMilliseconds(); 30 // Update the recursive average filter. 31 loss_rate_filter_->Apply( 32 static_cast<float>(now_ms - last_loss_rate_update_time_ms_), 33 static_cast<float>(loss_rate)); 34 last_loss_rate_update_time_ms_ = now_ms; 35 } 36 37 } // namespace voe 38 } // namespace webrtc 39
