mirror of
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126 lines
4.8 KiB
C++
126 lines
4.8 KiB
C++
/*
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* Copyright (c) 2020 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 "modules/video_coding/chain_diff_calculator.h"
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#include "test/gmock.h"
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#include "test/gtest.h"
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namespace webrtc {
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namespace {
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using ::testing::ElementsAre;
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using ::testing::SizeIs;
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TEST(ChainDiffCalculatorTest, SingleChain) {
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// Simulate a stream with 2 temporal layer where chain
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// protects temporal layer 0.
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ChainDiffCalculator calculator;
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// Key frame.
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calculator.Reset({true});
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EXPECT_THAT(calculator.From(1, {true}), ElementsAre(0));
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// T1 delta frame.
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EXPECT_THAT(calculator.From(2, {false}), ElementsAre(1));
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// T0 delta frame.
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EXPECT_THAT(calculator.From(3, {true}), ElementsAre(2));
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}
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TEST(ChainDiffCalculatorTest, TwoChainsFullSvc) {
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// Simulate a full svc stream with 2 spatial and 2 temporal layers.
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// chains are protecting temporal layers 0.
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ChainDiffCalculator calculator;
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// S0 Key frame.
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calculator.Reset({true, true});
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EXPECT_THAT(calculator.From(1, {true, true}), ElementsAre(0, 0));
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// S1 Key frame.
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EXPECT_THAT(calculator.From(2, {false, true}), ElementsAre(1, 1));
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// S0T1 delta frame.
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EXPECT_THAT(calculator.From(3, {false, false}), ElementsAre(2, 1));
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// S1T1 delta frame.
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EXPECT_THAT(calculator.From(4, {false, false}), ElementsAre(3, 2));
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// S0T0 delta frame.
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EXPECT_THAT(calculator.From(5, {true, true}), ElementsAre(4, 3));
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// S1T0 delta frame.
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EXPECT_THAT(calculator.From(6, {false, true}), ElementsAre(1, 1));
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}
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TEST(ChainDiffCalculatorTest, TwoChainsKSvc) {
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// Simulate a k-svc stream with 2 spatial and 2 temporal layers.
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// chains are protecting temporal layers 0.
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ChainDiffCalculator calculator;
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// S0 Key frame.
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calculator.Reset({true, true});
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EXPECT_THAT(calculator.From(1, {true, true}), ElementsAre(0, 0));
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// S1 Key frame.
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EXPECT_THAT(calculator.From(2, {false, true}), ElementsAre(1, 1));
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// S0T1 delta frame.
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EXPECT_THAT(calculator.From(3, {false, false}), ElementsAre(2, 1));
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// S1T1 delta frame.
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EXPECT_THAT(calculator.From(4, {false, false}), ElementsAre(3, 2));
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// S0T0 delta frame.
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EXPECT_THAT(calculator.From(5, {true, false}), ElementsAre(4, 3));
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// S1T0 delta frame.
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EXPECT_THAT(calculator.From(6, {false, true}), ElementsAre(1, 4));
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}
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TEST(ChainDiffCalculatorTest, TwoChainsSimulcast) {
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// Simulate a k-svc stream with 2 spatial and 2 temporal layers.
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// chains are protecting temporal layers 0.
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ChainDiffCalculator calculator;
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// S0 Key frame.
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calculator.Reset({true, false});
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EXPECT_THAT(calculator.From(1, {true, false}), ElementsAre(0, 0));
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// S1 Key frame.
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calculator.Reset({false, true});
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EXPECT_THAT(calculator.From(2, {false, true}), ElementsAre(1, 0));
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// S0T1 delta frame.
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EXPECT_THAT(calculator.From(3, {false, false}), ElementsAre(2, 1));
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// S1T1 delta frame.
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EXPECT_THAT(calculator.From(4, {false, false}), ElementsAre(3, 2));
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// S0T0 delta frame.
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EXPECT_THAT(calculator.From(5, {true, false}), ElementsAre(4, 3));
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// S1T0 delta frame.
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EXPECT_THAT(calculator.From(6, {false, true}), ElementsAre(1, 4));
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}
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TEST(ChainDiffCalculatorTest, ResilentToAbsentChainConfig) {
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ChainDiffCalculator calculator;
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// Key frame.
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calculator.Reset({true, false});
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EXPECT_THAT(calculator.From(1, {true, false}), ElementsAre(0, 0));
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// Forgot to set chains. should still return 2 chain_diffs.
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EXPECT_THAT(calculator.From(2, {}), ElementsAre(1, 0));
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// chain diffs for next frame(s) are undefined, but still there should be
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// correct number of them.
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EXPECT_THAT(calculator.From(3, {true, false}), SizeIs(2));
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EXPECT_THAT(calculator.From(4, {false, true}), SizeIs(2));
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// Since previous two frames updated all the chains, can expect what
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// chain_diffs would be.
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EXPECT_THAT(calculator.From(5, {false, false}), ElementsAre(2, 1));
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}
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TEST(ChainDiffCalculatorTest, ResilentToTooMainChains) {
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ChainDiffCalculator calculator;
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// Key frame.
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calculator.Reset({true, false});
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EXPECT_THAT(calculator.From(1, {true, false}), ElementsAre(0, 0));
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// Set wrong number of chains. Expect number of chain_diffs is not changed.
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EXPECT_THAT(calculator.From(2, {true, true, true}), ElementsAre(1, 0));
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// chain diffs for next frame(s) are undefined, but still there should be
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// correct number of them.
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EXPECT_THAT(calculator.From(3, {true, false}), SizeIs(2));
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EXPECT_THAT(calculator.From(4, {false, true}), SizeIs(2));
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// Since previous two frames updated all the chains, can expect what
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// chain_diffs would be.
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EXPECT_THAT(calculator.From(5, {false, false}), ElementsAre(2, 1));
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}
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} // namespace
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} // namespace webrtc
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