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/*
* Copyright (c) 2014 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.
*/
#include <algorithm>
#include <vector>
#include "testing/gtest/include/gtest/gtest.h"
#include "webrtc/modules/bitrate_controller/send_side_bandwidth_estimation.h"
namespace webrtc {
class TestBandwidthEstimation : public SendSideBandwidthEstimation {
public:
explicit TestBandwidthEstimation(bool in_experiment)
: in_experiment_(in_experiment) {}
virtual bool ProbingExperimentIsEnabled() const OVERRIDE {
return in_experiment_;
}
private:
bool in_experiment_;
};
TEST(SendSideBweTest, InitialRembWithProbing) {
TestBandwidthEstimation bwe(true);
bwe.SetMinMaxBitrate(100000, 1500000);
bwe.SetSendBitrate(200000);
const uint32_t kRemb = 1000000u;
const uint32_t kSecondRemb = kRemb + 500000u;
int64_t now_ms = 0;
bwe.UpdateReceiverBlock(0, 50, 1, now_ms);
// Initial REMB applies immediately.
bwe.UpdateReceiverEstimate(kRemb);
bwe.UpdateEstimate(now_ms);
uint32_t bitrate;
uint8_t fraction_loss;
uint32_t rtt;
bwe.CurrentEstimate(&bitrate, &fraction_loss, &rtt);
EXPECT_EQ(kRemb, bitrate);
// Second REMB doesn't apply immediately.
now_ms += 2001;
bwe.UpdateReceiverEstimate(kSecondRemb);
bwe.UpdateEstimate(now_ms);
bitrate = 0;
bwe.CurrentEstimate(&bitrate, &fraction_loss, &rtt);
EXPECT_EQ(kRemb, bitrate);
}
TEST(SendSideBweTest, InitialRembWithoutProbing) {
TestBandwidthEstimation bwe(false);
bwe.SetMinMaxBitrate(100000, 1500000);
const uint32_t kStartBitrate = 200000;
bwe.SetSendBitrate(kStartBitrate);
int64_t now_ms = 0;
bwe.UpdateReceiverBlock(0, 50, 1, now_ms);
// Initial REMB doesn't apply immediately.
const uint32_t kRemb = 1000000u;
bwe.UpdateReceiverEstimate(kRemb);
bwe.UpdateEstimate(now_ms);
uint32_t bitrate;
uint8_t fraction_loss;
uint32_t rtt;
bwe.CurrentEstimate(&bitrate, &fraction_loss, &rtt);
EXPECT_EQ(kStartBitrate, bitrate);
}
} // namespace webrtc
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