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298 lines
9.9 KiB
C++
298 lines
9.9 KiB
C++
/*
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* Copyright (c) 2012 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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// Unit tests for DelayManager class.
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#include "webrtc/modules/audio_coding/neteq/delay_manager.h"
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#include <math.h>
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#include "gmock/gmock.h"
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#include "gtest/gtest.h"
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#include "webrtc/modules/audio_coding/neteq/mock/mock_delay_peak_detector.h"
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namespace webrtc {
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using ::testing::Return;
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using ::testing::_;
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class DelayManagerTest : public ::testing::Test {
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protected:
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static const int kMaxNumberOfPackets = 240;
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static const int kTimeStepMs = 10;
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static const int kFs = 8000;
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static const int kFrameSizeMs = 20;
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static const int kTsIncrement = kFrameSizeMs * kFs / 1000;
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DelayManagerTest();
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virtual void SetUp();
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virtual void TearDown();
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void SetPacketAudioLength(int lengt_ms);
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void InsertNextPacket();
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void IncreaseTime(int inc_ms);
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DelayManager* dm_;
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MockDelayPeakDetector detector_;
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uint16_t seq_no_;
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uint32_t ts_;
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};
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DelayManagerTest::DelayManagerTest()
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: dm_(NULL),
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seq_no_(0x1234),
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ts_(0x12345678) {
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}
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void DelayManagerTest::SetUp() {
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EXPECT_CALL(detector_, Reset())
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.Times(1);
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dm_ = new DelayManager(kMaxNumberOfPackets, &detector_);
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}
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void DelayManagerTest::SetPacketAudioLength(int lengt_ms) {
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EXPECT_CALL(detector_, SetPacketAudioLength(lengt_ms));
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dm_->SetPacketAudioLength(lengt_ms);
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}
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void DelayManagerTest::InsertNextPacket() {
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EXPECT_EQ(0, dm_->Update(seq_no_, ts_, kFs));
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seq_no_ += 1;
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ts_ += kTsIncrement;
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}
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void DelayManagerTest::IncreaseTime(int inc_ms) {
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for (int t = 0; t < inc_ms; t += kTimeStepMs) {
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EXPECT_CALL(detector_, IncrementCounter(kTimeStepMs))
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.Times(1);
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dm_->UpdateCounters(kTimeStepMs);
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}
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}
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void DelayManagerTest::TearDown() {
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EXPECT_CALL(detector_, Die());
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delete dm_;
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}
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TEST_F(DelayManagerTest, CreateAndDestroy) {
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// Nothing to do here. The test fixture creates and destroys the DelayManager
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// object.
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}
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TEST_F(DelayManagerTest, VectorInitialization) {
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const DelayManager::IATVector& vec = dm_->iat_vector();
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double sum = 0.0;
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for (size_t i = 0; i < vec.size(); i++) {
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EXPECT_NEAR(ldexp(pow(0.5, static_cast<int>(i + 1)), 30), vec[i], 65536);
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// Tolerance 65536 in Q30 corresponds to a delta of approximately 0.00006.
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sum += vec[i];
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}
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EXPECT_EQ(1 << 30, static_cast<int>(sum)); // Should be 1 in Q30.
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}
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TEST_F(DelayManagerTest, SetPacketAudioLength) {
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const int kLengthMs = 30;
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// Expect DelayManager to pass on the new length to the detector object.
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EXPECT_CALL(detector_, SetPacketAudioLength(kLengthMs))
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.Times(1);
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EXPECT_EQ(0, dm_->SetPacketAudioLength(kLengthMs));
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EXPECT_EQ(-1, dm_->SetPacketAudioLength(-1)); // Illegal parameter value.
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}
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TEST_F(DelayManagerTest, PeakFound) {
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// Expect DelayManager to pass on the question to the detector.
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// Call twice, and let the detector return true the first time and false the
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// second time.
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EXPECT_CALL(detector_, peak_found())
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.WillOnce(Return(true))
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.WillOnce(Return(false));
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EXPECT_TRUE(dm_->PeakFound());
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EXPECT_FALSE(dm_->PeakFound());
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}
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TEST_F(DelayManagerTest, UpdateCounters) {
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// Expect DelayManager to pass on the counter update to the detector.
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EXPECT_CALL(detector_, IncrementCounter(kTimeStepMs))
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.Times(1);
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dm_->UpdateCounters(kTimeStepMs);
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}
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TEST_F(DelayManagerTest, UpdateNormal) {
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SetPacketAudioLength(kFrameSizeMs);
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// First packet arrival.
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InsertNextPacket();
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// Advance time by one frame size.
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IncreaseTime(kFrameSizeMs);
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// Second packet arrival.
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// Expect detector update method to be called once with inter-arrival time
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// equal to 1 packet, and (base) target level equal to 1 as well.
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// Return false to indicate no peaks found.
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EXPECT_CALL(detector_, Update(1, 1))
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.WillOnce(Return(false));
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InsertNextPacket();
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EXPECT_EQ(1 << 8, dm_->TargetLevel()); // In Q8.
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EXPECT_EQ(1, dm_->base_target_level());
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int lower, higher;
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dm_->BufferLimits(&lower, &higher);
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// Expect |lower| to be 75% of target level, and |higher| to be target level,
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// but also at least 20 ms higher than |lower|, which is the limiting case
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// here.
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EXPECT_EQ((1 << 8) * 3 / 4, lower);
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EXPECT_EQ(lower + (20 << 8) / kFrameSizeMs, higher);
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}
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TEST_F(DelayManagerTest, UpdateLongInterArrivalTime) {
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SetPacketAudioLength(kFrameSizeMs);
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// First packet arrival.
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InsertNextPacket();
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// Advance time by two frame size.
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IncreaseTime(2 * kFrameSizeMs);
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// Second packet arrival.
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// Expect detector update method to be called once with inter-arrival time
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// equal to 1 packet, and (base) target level equal to 1 as well.
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// Return false to indicate no peaks found.
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EXPECT_CALL(detector_, Update(2, 2))
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.WillOnce(Return(false));
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InsertNextPacket();
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EXPECT_EQ(2 << 8, dm_->TargetLevel()); // In Q8.
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EXPECT_EQ(2, dm_->base_target_level());
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int lower, higher;
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dm_->BufferLimits(&lower, &higher);
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// Expect |lower| to be 75% of target level, and |higher| to be target level,
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// but also at least 20 ms higher than |lower|, which is the limiting case
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// here.
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EXPECT_EQ((2 << 8) * 3 / 4, lower);
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EXPECT_EQ(lower + (20 << 8) / kFrameSizeMs, higher);
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}
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TEST_F(DelayManagerTest, UpdatePeakFound) {
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SetPacketAudioLength(kFrameSizeMs);
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// First packet arrival.
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InsertNextPacket();
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// Advance time by one frame size.
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IncreaseTime(kFrameSizeMs);
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// Second packet arrival.
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// Expect detector update method to be called once with inter-arrival time
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// equal to 1 packet, and (base) target level equal to 1 as well.
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// Return true to indicate that peaks are found. Let the peak height be 5.
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EXPECT_CALL(detector_, Update(1, 1))
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.WillOnce(Return(true));
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EXPECT_CALL(detector_, MaxPeakHeight())
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.WillOnce(Return(5));
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InsertNextPacket();
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EXPECT_EQ(5 << 8, dm_->TargetLevel());
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EXPECT_EQ(1, dm_->base_target_level()); // Base target level is w/o peaks.
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int lower, higher;
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dm_->BufferLimits(&lower, &higher);
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// Expect |lower| to be 75% of target level, and |higher| to be target level.
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EXPECT_EQ((5 << 8) * 3 / 4, lower);
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EXPECT_EQ(5 << 8, higher);
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}
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TEST_F(DelayManagerTest, TargetDelay) {
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SetPacketAudioLength(kFrameSizeMs);
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// First packet arrival.
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InsertNextPacket();
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// Advance time by one frame size.
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IncreaseTime(kFrameSizeMs);
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// Second packet arrival.
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// Expect detector update method to be called once with inter-arrival time
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// equal to 1 packet, and (base) target level equal to 1 as well.
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// Return false to indicate no peaks found.
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EXPECT_CALL(detector_, Update(1, 1))
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.WillOnce(Return(false));
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InsertNextPacket();
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const int kExpectedTarget = 1;
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EXPECT_EQ(kExpectedTarget << 8, dm_->TargetLevel()); // In Q8.
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EXPECT_EQ(1, dm_->base_target_level());
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int lower, higher;
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dm_->BufferLimits(&lower, &higher);
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// Expect |lower| to be 75% of base target level, and |higher| to be
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// lower + 20 ms headroom.
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EXPECT_EQ((1 << 8) * 3 / 4, lower);
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EXPECT_EQ(lower + (20 << 8) / kFrameSizeMs, higher);
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}
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TEST_F(DelayManagerTest, MaxAndRequiredDelay) {
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const int kExpectedTarget = 5;
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const int kTimeIncrement = kExpectedTarget * kFrameSizeMs;
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SetPacketAudioLength(kFrameSizeMs);
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// First packet arrival.
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InsertNextPacket();
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// Second packet arrival.
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// Expect detector update method to be called once with inter-arrival time
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// equal to |kExpectedTarget| packet. Return true to indicate peaks found.
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EXPECT_CALL(detector_, Update(kExpectedTarget, _))
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.WillRepeatedly(Return(true));
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EXPECT_CALL(detector_, MaxPeakHeight())
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.WillRepeatedly(Return(kExpectedTarget));
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IncreaseTime(kTimeIncrement);
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InsertNextPacket();
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// No limit is set.
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EXPECT_EQ(kExpectedTarget << 8, dm_->TargetLevel());
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int kMaxDelayPackets = kExpectedTarget - 2;
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int kMaxDelayMs = kMaxDelayPackets * kFrameSizeMs;
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EXPECT_TRUE(dm_->SetMaximumDelay(kMaxDelayMs));
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IncreaseTime(kTimeIncrement);
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InsertNextPacket();
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EXPECT_EQ(kExpectedTarget * kFrameSizeMs, dm_->least_required_delay_ms());
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EXPECT_EQ(kMaxDelayPackets << 8, dm_->TargetLevel());
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// Target level at least should be one packet.
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EXPECT_FALSE(dm_->SetMaximumDelay(kFrameSizeMs - 1));
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}
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TEST_F(DelayManagerTest, MinAndRequiredDelay) {
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const int kExpectedTarget = 5;
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const int kTimeIncrement = kExpectedTarget * kFrameSizeMs;
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SetPacketAudioLength(kFrameSizeMs);
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// First packet arrival.
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InsertNextPacket();
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// Second packet arrival.
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// Expect detector update method to be called once with inter-arrival time
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// equal to |kExpectedTarget| packet. Return true to indicate peaks found.
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EXPECT_CALL(detector_, Update(kExpectedTarget, _))
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.WillRepeatedly(Return(true));
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EXPECT_CALL(detector_, MaxPeakHeight())
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.WillRepeatedly(Return(kExpectedTarget));
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IncreaseTime(kTimeIncrement);
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InsertNextPacket();
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// No limit is applied.
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EXPECT_EQ(kExpectedTarget << 8, dm_->TargetLevel());
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int kMinDelayPackets = kExpectedTarget + 2;
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int kMinDelayMs = kMinDelayPackets * kFrameSizeMs;
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dm_->SetMinimumDelay(kMinDelayMs);
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IncreaseTime(kTimeIncrement);
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InsertNextPacket();
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EXPECT_EQ(kExpectedTarget * kFrameSizeMs, dm_->least_required_delay_ms());
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EXPECT_EQ(kMinDelayPackets << 8, dm_->TargetLevel());
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}
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TEST_F(DelayManagerTest, Failures) {
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// Wrong sample rate.
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EXPECT_EQ(-1, dm_->Update(0, 0, -1));
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// Wrong packet size.
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EXPECT_EQ(-1, dm_->SetPacketAudioLength(0));
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EXPECT_EQ(-1, dm_->SetPacketAudioLength(-1));
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// Minimum delay higher than a maximum delay is not accepted.
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EXPECT_TRUE(dm_->SetMaximumDelay(10));
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EXPECT_FALSE(dm_->SetMinimumDelay(20));
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// Maximum delay less than minimum delay is not accepted.
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EXPECT_TRUE(dm_->SetMaximumDelay(100));
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EXPECT_TRUE(dm_->SetMinimumDelay(80));
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EXPECT_FALSE(dm_->SetMaximumDelay(60));
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}
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} // namespace webrtc
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