9b79197c80
BUG=4082 R=stefan@webrtc.org Review URL: https://webrtc-codereview.appspot.com/37369004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@7948 4adac7df-926f-26a2-2b94-8c16560cd09d
113 lines
2.9 KiB
C++
113 lines
2.9 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 "testing/gtest/include/gtest/gtest.h"
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#include <algorithm>
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#include <vector>
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#include "webrtc/modules/bitrate_controller/remb_suppressor.h"
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class TestSuppressor : public webrtc::RembSuppressor {
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public:
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explicit TestSuppressor(webrtc::Clock* clock) : RembSuppressor(clock) {}
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virtual ~TestSuppressor() {}
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virtual bool Enabled() OVERRIDE { return true; }
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};
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class RembSuppressorTest : public ::testing::Test {
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protected:
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RembSuppressorTest() : clock_(0), suppressor_(&clock_) {}
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~RembSuppressorTest() {}
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virtual void SetUp() {}
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virtual void TearDown() {}
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bool NewRemb(uint32_t bitrate_bps) {
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suppressor_.SetBitrateSent(bitrate_bps);
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bool suppress = suppressor_.SuppresNewRemb(bitrate_bps);
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// Default one REMB per second.
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clock_.AdvanceTimeMilliseconds(1000);
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return suppress;
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}
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webrtc::SimulatedClock clock_;
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TestSuppressor suppressor_;
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};
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TEST_F(RembSuppressorTest, Basic) {
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// Never true on first sample.
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EXPECT_FALSE(NewRemb(50000));
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// Some rampup.
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EXPECT_FALSE(NewRemb(55000));
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EXPECT_FALSE(NewRemb(60500));
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EXPECT_FALSE(NewRemb(66550));
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EXPECT_FALSE(NewRemb(73250));
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// Reached limit, some fluctuation ok.
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EXPECT_FALSE(NewRemb(72100));
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EXPECT_FALSE(NewRemb(75500));
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EXPECT_FALSE(NewRemb(69250));
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EXPECT_FALSE(NewRemb(73250));
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}
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TEST_F(RembSuppressorTest, RecoveryTooSlow) {
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// Never true on first sample.
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EXPECT_FALSE(NewRemb(50000));
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// Large drop.
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EXPECT_TRUE(NewRemb(22499));
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// No new estimate, still suppressing.
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EXPECT_TRUE(NewRemb(22499));
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// Too little increase - stop suppressing.
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EXPECT_FALSE(NewRemb(22835));
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}
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TEST_F(RembSuppressorTest, RembDownDurinSupression) {
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// Never true on first sample.
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EXPECT_FALSE(NewRemb(50000));
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// Large drop.
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EXPECT_TRUE(NewRemb(22499));
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// Remb is not allowed to fall.
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EXPECT_FALSE(NewRemb(22498));
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}
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TEST_F(RembSuppressorTest, GlitchWithRecovery) {
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const uint32_t start_bitrate = 300000;
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uint32_t bitrate = start_bitrate;
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// Never true on first sample.
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EXPECT_FALSE(NewRemb(bitrate));
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bitrate = static_cast<uint32_t>(bitrate * 0.44);
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EXPECT_TRUE(NewRemb(bitrate));
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while (bitrate < start_bitrate) {
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EXPECT_TRUE(NewRemb(bitrate));
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bitrate = static_cast<uint32_t>(bitrate * 1.10);
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}
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EXPECT_FALSE(NewRemb(bitrate));
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}
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TEST_F(RembSuppressorTest, BitrateSent) {
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// Never true on first sample.
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EXPECT_FALSE(NewRemb(50000));
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// Only suppress large drop, if we are not sending at full capacity.
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suppressor_.SetBitrateSent(37500);
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EXPECT_FALSE(suppressor_.SuppresNewRemb(22499));
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}
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