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/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
// This file includes unit tests for ViERemb.
#include <vector>
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "webrtc/base/scoped_ptr.h"
#include "webrtc/modules/rtp_rtcp/include/rtp_rtcp.h"
#include "webrtc/modules/rtp_rtcp/mocks/mock_rtp_rtcp.h"
#include "webrtc/modules/utility/include/mock/mock_process_thread.h"
#include "webrtc/system_wrappers/include/tick_util.h"
#include "webrtc/video/vie_remb.h"
using ::testing::_;
using ::testing::AnyNumber;
using ::testing::NiceMock;
using ::testing::Return;
namespace webrtc {
class ViERembTest : public ::testing::Test {
public:
ViERembTest() : fake_clock_(12345) {}
protected:
virtual void SetUp() {
process_thread_.reset(new NiceMock<MockProcessThread>);
vie_remb_.reset(new VieRemb(&fake_clock_));
}
SimulatedClock fake_clock_;
rtc::scoped_ptr<MockProcessThread> process_thread_;
rtc::scoped_ptr<VieRemb> vie_remb_;
};
TEST_F(ViERembTest, OneModuleTestForSendingRemb) {
MockRtpRtcp rtp;
vie_remb_->AddReceiveChannel(&rtp);
vie_remb_->AddRembSender(&rtp);
const unsigned int bitrate_estimate = 456;
unsigned int ssrc = 1234;
std::vector<unsigned int> ssrcs(&ssrc, &ssrc + 1);
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate);
fake_clock_.AdvanceTimeMilliseconds(1000);
EXPECT_CALL(rtp, SetREMBData(bitrate_estimate, ssrcs))
.Times(1);
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate);
// Lower bitrate to send another REMB packet.
EXPECT_CALL(rtp, SetREMBData(bitrate_estimate - 100, ssrcs))
.Times(1);
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate - 100);
vie_remb_->RemoveReceiveChannel(&rtp);
vie_remb_->RemoveRembSender(&rtp);
}
TEST_F(ViERembTest, LowerEstimateToSendRemb) {
MockRtpRtcp rtp;
vie_remb_->AddReceiveChannel(&rtp);
vie_remb_->AddRembSender(&rtp);
unsigned int bitrate_estimate = 456;
unsigned int ssrc = 1234;
std::vector<unsigned int> ssrcs(&ssrc, &ssrc + 1);
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate);
// Call OnReceiveBitrateChanged twice to get a first estimate.
fake_clock_.AdvanceTimeMilliseconds(1000);
EXPECT_CALL(rtp, SetREMBData(bitrate_estimate, ssrcs))
.Times(1);
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate);
// Lower the estimate with more than 3% to trigger a call to SetREMBData right
// away.
bitrate_estimate = bitrate_estimate - 100;
EXPECT_CALL(rtp, SetREMBData(bitrate_estimate, ssrcs))
.Times(1);
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate);
}
TEST_F(ViERembTest, VerifyIncreasingAndDecreasing) {
MockRtpRtcp rtp_0;
MockRtpRtcp rtp_1;
vie_remb_->AddReceiveChannel(&rtp_0);
vie_remb_->AddRembSender(&rtp_0);
vie_remb_->AddReceiveChannel(&rtp_1);
unsigned int bitrate_estimate[] = { 456, 789 };
unsigned int ssrc[] = { 1234, 5678 };
std::vector<unsigned int> ssrcs(ssrc, ssrc + sizeof(ssrc) / sizeof(ssrc[0]));
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate[0]);
// Call OnReceiveBitrateChanged twice to get a first estimate.
EXPECT_CALL(rtp_0, SetREMBData(bitrate_estimate[0], ssrcs))
.Times(1);
fake_clock_.AdvanceTimeMilliseconds(1000);
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate[0]);
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate[1] + 100);
// Lower the estimate to trigger a callback.
EXPECT_CALL(rtp_0, SetREMBData(bitrate_estimate[1], ssrcs))
.Times(1);
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate[1]);
vie_remb_->RemoveReceiveChannel(&rtp_0);
vie_remb_->RemoveRembSender(&rtp_0);
vie_remb_->RemoveReceiveChannel(&rtp_1);
}
TEST_F(ViERembTest, NoRembForIncreasedBitrate) {
MockRtpRtcp rtp_0;
MockRtpRtcp rtp_1;
vie_remb_->AddReceiveChannel(&rtp_0);
vie_remb_->AddRembSender(&rtp_0);
vie_remb_->AddReceiveChannel(&rtp_1);
unsigned int bitrate_estimate = 456;
unsigned int ssrc[] = { 1234, 5678 };
std::vector<unsigned int> ssrcs(ssrc, ssrc + sizeof(ssrc) / sizeof(ssrc[0]));
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate);
// Call OnReceiveBitrateChanged twice to get a first estimate.
fake_clock_.AdvanceTimeMilliseconds(1000);
EXPECT_CALL(rtp_0, SetREMBData(bitrate_estimate, ssrcs))
.Times(1);
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate);
// Increased estimate shouldn't trigger a callback right away.
EXPECT_CALL(rtp_0, SetREMBData(_, _))
.Times(0);
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate + 1);
// Decreasing the estimate less than 3% shouldn't trigger a new callback.
EXPECT_CALL(rtp_0, SetREMBData(_, _))
.Times(0);
int lower_estimate = bitrate_estimate * 98 / 100;
vie_remb_->OnReceiveBitrateChanged(ssrcs, lower_estimate);
vie_remb_->RemoveReceiveChannel(&rtp_1);
vie_remb_->RemoveReceiveChannel(&rtp_0);
vie_remb_->RemoveRembSender(&rtp_0);
}
TEST_F(ViERembTest, ChangeSendRtpModule) {
MockRtpRtcp rtp_0;
MockRtpRtcp rtp_1;
vie_remb_->AddReceiveChannel(&rtp_0);
vie_remb_->AddRembSender(&rtp_0);
vie_remb_->AddReceiveChannel(&rtp_1);
unsigned int bitrate_estimate = 456;
unsigned int ssrc[] = { 1234, 5678 };
std::vector<unsigned int> ssrcs(ssrc, ssrc + sizeof(ssrc) / sizeof(ssrc[0]));
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate);
// Call OnReceiveBitrateChanged twice to get a first estimate.
fake_clock_.AdvanceTimeMilliseconds(1000);
EXPECT_CALL(rtp_0, SetREMBData(bitrate_estimate, ssrcs))
.Times(1);
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate);
// Decrease estimate to trigger a REMB.
bitrate_estimate = bitrate_estimate - 100;
EXPECT_CALL(rtp_0, SetREMBData(bitrate_estimate, ssrcs))
.Times(1);
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate);
// Remove the sending module, add it again -> should get remb on the second
// module.
vie_remb_->RemoveRembSender(&rtp_0);
vie_remb_->AddRembSender(&rtp_1);
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate);
bitrate_estimate = bitrate_estimate - 100;
EXPECT_CALL(rtp_1, SetREMBData(bitrate_estimate, ssrcs))
.Times(1);
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate);
vie_remb_->RemoveReceiveChannel(&rtp_0);
vie_remb_->RemoveReceiveChannel(&rtp_1);
}
TEST_F(ViERembTest, OnlyOneRembForDoubleProcess) {
MockRtpRtcp rtp;
unsigned int bitrate_estimate = 456;
unsigned int ssrc = 1234;
std::vector<unsigned int> ssrcs(&ssrc, &ssrc + 1);
vie_remb_->AddReceiveChannel(&rtp);
vie_remb_->AddRembSender(&rtp);
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate);
// Call OnReceiveBitrateChanged twice to get a first estimate.
fake_clock_.AdvanceTimeMilliseconds(1000);
EXPECT_CALL(rtp, SetREMBData(_, _))
.Times(1);
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate);
// Lower the estimate, should trigger a call to SetREMBData right away.
bitrate_estimate = bitrate_estimate - 100;
EXPECT_CALL(rtp, SetREMBData(bitrate_estimate, ssrcs))
.Times(1);
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate);
// Call OnReceiveBitrateChanged again, this should not trigger a new callback.
EXPECT_CALL(rtp, SetREMBData(_, _))
.Times(0);
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate);
vie_remb_->RemoveReceiveChannel(&rtp);
vie_remb_->RemoveRembSender(&rtp);
}
// Only register receiving modules and make sure we fallback to trigger a REMB
// packet on this one.
TEST_F(ViERembTest, NoSendingRtpModule) {
MockRtpRtcp rtp;
vie_remb_->AddReceiveChannel(&rtp);
unsigned int bitrate_estimate = 456;
unsigned int ssrc = 1234;
std::vector<unsigned int> ssrcs(&ssrc, &ssrc + 1);
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate);
// Call OnReceiveBitrateChanged twice to get a first estimate.
fake_clock_.AdvanceTimeMilliseconds(1000);
EXPECT_CALL(rtp, SetREMBData(_, _))
.Times(1);
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate);
// Lower the estimate to trigger a new packet REMB packet.
bitrate_estimate = bitrate_estimate - 100;
EXPECT_CALL(rtp, SetREMBData(_, _))
.Times(1);
vie_remb_->OnReceiveBitrateChanged(ssrcs, bitrate_estimate);
}
} // namespace webrtc
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