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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include <stdint.h> | |
| 6 | |
| 7 #include "base/test/simple_test_tick_clock.h" | |
| 8 #include "media/cast/cast_defines.h" | |
| 9 #include "media/cast/congestion_control/congestion_control.h" | |
| 10 #include "media/cast/test/fake_single_thread_task_runner.h" | |
| 11 #include "testing/gtest/include/gtest/gtest.h" | |
| 12 | |
| 13 namespace media { | |
| 14 namespace cast { | |
| 15 | |
| 16 static const uint32 kMaxBitrateConfigured = 5000000; | |
| 17 static const uint32 kMinBitrateConfigured = 500000; | |
| 18 static const int64 kStartMillisecond = INT64_C(12345678900000); | |
| 19 static const double kTargetEmptyBufferFraction = 0.9; | |
| 20 | |
| 21 class CongestionControlTest : public ::testing::Test { | |
| 22 protected: | |
| 23 CongestionControlTest() | |
| 24 : task_runner_(new test::FakeSingleThreadTaskRunner(&testing_clock_)) { | |
| 25 testing_clock_.Advance( | |
| 26 base::TimeDelta::FromMilliseconds(kStartMillisecond)); | |
| 27 congestion_control_.reset(new CongestionControl( | |
| 28 &testing_clock_, kMaxBitrateConfigured, kMinBitrateConfigured, 10)); | |
| 29 } | |
| 30 | |
| 31 void AckFrame(uint32 frame_id) { | |
| 32 congestion_control_->AckFrame(frame_id, testing_clock_.NowTicks()); | |
| 33 } | |
| 34 | |
| 35 void Run(uint32 frames, | |
| 36 size_t frame_size, | |
| 37 base::TimeDelta rtt, | |
| 38 base::TimeDelta frame_delay, | |
| 39 base::TimeDelta ack_time) { | |
| 40 for (frame_id_ = 0; frame_id_ < frames; frame_id_++) { | |
| 41 congestion_control_->UpdateRtt(rtt); | |
| 42 congestion_control_->SendFrameToTransport( | |
| 43 frame_id_, frame_size, testing_clock_.NowTicks()); | |
| 44 task_runner_->PostDelayedTask(FROM_HERE, | |
| 45 base::Bind(&CongestionControlTest::AckFrame, | |
| 46 base::Unretained(this), | |
| 47 frame_id_), | |
| 48 ack_time); | |
| 49 task_runner_->Sleep(frame_delay); | |
| 50 } | |
| 51 } | |
| 52 | |
| 53 base::SimpleTestTickClock testing_clock_; | |
| 54 scoped_ptr<CongestionControl> congestion_control_; | |
| 55 scoped_refptr<test::FakeSingleThreadTaskRunner> task_runner_; | |
| 56 uint32 frame_id_; | |
| 57 | |
| 58 DISALLOW_COPY_AND_ASSIGN(CongestionControlTest); | |
| 59 }; | |
| 60 | |
| 61 TEST_F(CongestionControlTest, SimpleRun) { | |
| 62 uint32 frame_delay = 33; | |
| 63 uint32 frame_size = 10000 * 8; | |
| 64 Run(500, | |
| 65 frame_size, | |
| 66 base::TimeDelta::FromMilliseconds(10), | |
| 67 base::TimeDelta::FromMilliseconds(frame_delay), | |
| 68 base::TimeDelta::FromMilliseconds(45)); | |
| 69 // Empty the buffer. | |
| 70 task_runner_->Sleep(base::TimeDelta::FromMilliseconds(100)); | |
| 71 | |
| 72 uint32 safe_bitrate = frame_size * 1000 / frame_delay; | |
| 73 uint32 bitrate = congestion_control_->GetBitrate( | |
| 74 testing_clock_.NowTicks() + base::TimeDelta::FromMilliseconds(300), | |
| 75 base::TimeDelta::FromMilliseconds(300)); | |
| 76 EXPECT_NEAR( | |
| 77 safe_bitrate / kTargetEmptyBufferFraction, bitrate, safe_bitrate * 0.05); | |
| 78 | |
| 79 bitrate = congestion_control_->GetBitrate( | |
| 80 testing_clock_.NowTicks() + base::TimeDelta::FromMilliseconds(200), | |
| 81 base::TimeDelta::FromMilliseconds(300)); | |
| 82 EXPECT_NEAR(safe_bitrate / kTargetEmptyBufferFraction * 2 / 3, | |
| 83 bitrate, | |
| 84 safe_bitrate * 0.05); | |
| 85 | |
| 86 bitrate = congestion_control_->GetBitrate( | |
| 87 testing_clock_.NowTicks() + base::TimeDelta::FromMilliseconds(100), | |
| 88 base::TimeDelta::FromMilliseconds(300)); | |
| 89 EXPECT_NEAR(safe_bitrate / kTargetEmptyBufferFraction * 1 / 3, | |
| 90 bitrate, | |
| 91 safe_bitrate * 0.05); | |
| 92 | |
| 93 // Add a large (100ms) frame. | |
| 94 congestion_control_->SendFrameToTransport( | |
| 95 frame_id_++, safe_bitrate * 100 / 1000, testing_clock_.NowTicks()); | |
| 96 | |
| 97 // Results should show that we have ~200ms to send | |
| 98 bitrate = congestion_control_->GetBitrate( | |
| 99 testing_clock_.NowTicks() + base::TimeDelta::FromMilliseconds(300), | |
| 100 base::TimeDelta::FromMilliseconds(300)); | |
| 101 EXPECT_NEAR(safe_bitrate / kTargetEmptyBufferFraction * 2 / 3, | |
| 102 bitrate, | |
| 103 safe_bitrate * 0.05); | |
| 104 | |
| 105 // Add another large (100ms) frame. | |
| 106 congestion_control_->SendFrameToTransport( | |
| 107 frame_id_++, safe_bitrate * 100 / 1000, testing_clock_.NowTicks()); | |
| 108 | |
| 109 // Resulst should show that we have ~100ms to send | |
| 110 bitrate = congestion_control_->GetBitrate( | |
| 111 testing_clock_.NowTicks() + base::TimeDelta::FromMilliseconds(300), | |
| 112 base::TimeDelta::FromMilliseconds(300)); | |
| 113 EXPECT_NEAR(safe_bitrate / kTargetEmptyBufferFraction * 1 / 3, | |
| 114 bitrate, | |
| 115 safe_bitrate * 0.05); | |
| 116 } | |
| 117 | |
| 118 | |
| 119 } // namespace cast | |
| 120 } // namespace media | |
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Chromium Code Reviews
Issue 388663003:
Cast: Reshuffle files under media/cast (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src