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bb547203bf
In order to eliminate the WebRTC Subtree mirror in Chromium, WebRTC is moving the content of the src/webrtc directory up to the src/ directory. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true TBR=tommi@webrtc.org Bug: chromium:611808 Change-Id: Iac59c5b51b950f174119565bac87955a7994bc38 Reviewed-on: https://webrtc-review.googlesource.com/1560 Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Henrik Kjellander <kjellander@webrtc.org> Cr-Commit-Position: refs/heads/master@{#19845}
121 lines
3.9 KiB
C++
121 lines
3.9 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 <algorithm>
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#include <vector>
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#include "webrtc/logging/rtc_event_log/mock/mock_rtc_event_log.h"
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#include "webrtc/modules/bitrate_controller/send_side_bandwidth_estimation.h"
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#include "webrtc/test/gtest.h"
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namespace webrtc {
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void TestProbing(bool use_delay_based) {
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MockRtcEventLog event_log;
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SendSideBandwidthEstimation bwe(&event_log);
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bwe.SetMinMaxBitrate(100000, 1500000);
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bwe.SetSendBitrate(200000);
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const int kRembBps = 1000000;
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const int kSecondRembBps = kRembBps + 500000;
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int64_t now_ms = 0;
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bwe.UpdateReceiverBlock(0, 50, 1, now_ms);
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// Initial REMB applies immediately.
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if (use_delay_based) {
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bwe.UpdateDelayBasedEstimate(now_ms, kRembBps);
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} else {
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bwe.UpdateReceiverEstimate(now_ms, kRembBps);
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}
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bwe.UpdateEstimate(now_ms);
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int bitrate;
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uint8_t fraction_loss;
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int64_t rtt;
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bwe.CurrentEstimate(&bitrate, &fraction_loss, &rtt);
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EXPECT_EQ(kRembBps, bitrate);
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// Second REMB doesn't apply immediately.
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now_ms += 2001;
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if (use_delay_based) {
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bwe.UpdateDelayBasedEstimate(now_ms, kSecondRembBps);
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} else {
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bwe.UpdateReceiverEstimate(now_ms, kSecondRembBps);
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}
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bwe.UpdateEstimate(now_ms);
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bitrate = 0;
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bwe.CurrentEstimate(&bitrate, &fraction_loss, &rtt);
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EXPECT_EQ(kRembBps, bitrate);
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}
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TEST(SendSideBweTest, InitialRembWithProbing) {
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TestProbing(false);
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}
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TEST(SendSideBweTest, InitialDelayBasedBweWithProbing) {
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TestProbing(true);
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}
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TEST(SendSideBweTest, DoesntReapplyBitrateDecreaseWithoutFollowingRemb) {
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MockRtcEventLog event_log;
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EXPECT_CALL(event_log, LogLossBasedBweUpdate(testing::Gt(0), 0, 0)).Times(1);
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EXPECT_CALL(event_log,
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LogLossBasedBweUpdate(testing::Gt(0), testing::Gt(0), 0))
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.Times(2);
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SendSideBandwidthEstimation bwe(&event_log);
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static const int kMinBitrateBps = 100000;
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static const int kInitialBitrateBps = 1000000;
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bwe.SetMinMaxBitrate(kMinBitrateBps, 1500000);
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bwe.SetSendBitrate(kInitialBitrateBps);
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static const uint8_t kFractionLoss = 128;
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static const int64_t kRttMs = 50;
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int64_t now_ms = 0;
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int bitrate_bps;
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uint8_t fraction_loss;
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int64_t rtt_ms;
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bwe.CurrentEstimate(&bitrate_bps, &fraction_loss, &rtt_ms);
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EXPECT_EQ(kInitialBitrateBps, bitrate_bps);
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EXPECT_EQ(0, fraction_loss);
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EXPECT_EQ(0, rtt_ms);
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// Signal heavy loss to go down in bitrate.
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bwe.UpdateReceiverBlock(kFractionLoss, kRttMs, 100, now_ms);
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// Trigger an update 2 seconds later to not be rate limited.
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now_ms += 1000;
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bwe.UpdateEstimate(now_ms);
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bwe.CurrentEstimate(&bitrate_bps, &fraction_loss, &rtt_ms);
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EXPECT_LT(bitrate_bps, kInitialBitrateBps);
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// Verify that the obtained bitrate isn't hitting the min bitrate, or this
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// test doesn't make sense. If this ever happens, update the thresholds or
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// loss rates so that it doesn't hit min bitrate after one bitrate update.
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EXPECT_GT(bitrate_bps, kMinBitrateBps);
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EXPECT_EQ(kFractionLoss, fraction_loss);
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EXPECT_EQ(kRttMs, rtt_ms);
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// Triggering an update shouldn't apply further downgrade nor upgrade since
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// there's no intermediate receiver block received indicating whether this is
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// currently good or not.
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int last_bitrate_bps = bitrate_bps;
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// Trigger an update 2 seconds later to not be rate limited (but it still
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// shouldn't update).
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now_ms += 1000;
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bwe.UpdateEstimate(now_ms);
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bwe.CurrentEstimate(&bitrate_bps, &fraction_loss, &rtt_ms);
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EXPECT_EQ(last_bitrate_bps, bitrate_bps);
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// The old loss rate should still be applied though.
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EXPECT_EQ(kFractionLoss, fraction_loss);
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EXPECT_EQ(kRttMs, rtt_ms);
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}
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} // namespace webrtc
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