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
44 lines
1.4 KiB
C++
44 lines
1.4 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 <math.h>
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#include "testing/gtest/include/gtest/gtest.h"
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#include "webrtc/voice_engine/network_predictor.h"
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#include "webrtc/system_wrappers/interface/clock.h"
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namespace webrtc {
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namespace voe {
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class TestNetworkPredictor : public ::testing::Test {
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protected:
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TestNetworkPredictor()
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: clock_(0),
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network_predictor_(new NetworkPredictor(&clock_)) {}
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SimulatedClock clock_;
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scoped_ptr<NetworkPredictor> network_predictor_;
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};
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TEST_F(TestNetworkPredictor, TestPacketLossRateFilter) {
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// Test initial packet loss rate estimate is 0.
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EXPECT_EQ(0, network_predictor_->GetLossRate());
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network_predictor_->UpdatePacketLossRate(32);
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// First time, no filtering.
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EXPECT_EQ(32, network_predictor_->GetLossRate());
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clock_.AdvanceTimeMilliseconds(1000);
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network_predictor_->UpdatePacketLossRate(40);
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float exp = pow(0.9999f, 1000);
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float value = 32.0f * exp + (1 - exp) * 40.0f;
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EXPECT_EQ(static_cast<uint8_t>(value + 0.5f),
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network_predictor_->GetLossRate());
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}
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} // namespace voe
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} // namespace webrtc
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