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/*
* Copyright (c) 2022 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 "modules/video_coding/svc/scalability_mode_util.h"
#include <optional>
#include <string>
#include <tuple>
#include <vector>
#include "absl/strings/string_view.h"
#include "api/video_codecs/scalability_mode.h"
#include "test/gmock.h"
#include "test/gtest.h"
namespace webrtc {
namespace {
TEST(ScalabilityModeUtil, ConvertsL1T2) {
EXPECT_EQ(ScalabilityModeFromString("L1T2"), ScalabilityMode::kL1T2);
EXPECT_EQ(ScalabilityModeToString(ScalabilityMode::kL1T2), "L1T2");
}
TEST(ScalabilityModeUtil, RejectsUnknownString) {
EXPECT_EQ(ScalabilityModeFromString(""), std::nullopt);
EXPECT_EQ(ScalabilityModeFromString("not-a-mode"), std::nullopt);
}
TEST(ScalabilityModeUtil, MakeScalabilityModeRoundTrip) {
const ScalabilityMode kLastEnum = ScalabilityMode::kS3T3h;
for (int numerical_enum = 0; numerical_enum <= static_cast<int>(kLastEnum);
numerical_enum++) {
ScalabilityMode scalability_mode =
static_cast<ScalabilityMode>(numerical_enum);
std::optional<ScalabilityMode> created_mode = MakeScalabilityMode(
ScalabilityModeToNumSpatialLayers(scalability_mode),
ScalabilityModeToNumTemporalLayers(scalability_mode),
ScalabilityModeToInterLayerPredMode(scalability_mode),
ScalabilityModeToResolutionRatio(scalability_mode),
ScalabilityModeIsShiftMode(scalability_mode));
EXPECT_THAT(created_mode, ::testing::Optional(scalability_mode))
<< "Expected "
<< (created_mode.has_value() ? ScalabilityModeToString(*created_mode)
: "(nullopt)")
<< " to equal " << ScalabilityModeToString(scalability_mode);
}
}
// Check roundtrip conversion of all enum values.
TEST(ScalabilityModeUtil, ConvertsAllToAndFromString) {
const ScalabilityMode kLastEnum = ScalabilityMode::kS3T3h;
for (int numerical_enum = 0; numerical_enum <= static_cast<int>(kLastEnum);
numerical_enum++) {
ScalabilityMode scalability_mode =
static_cast<ScalabilityMode>(numerical_enum);
absl::string_view scalability_mode_string =
ScalabilityModeToString(scalability_mode);
EXPECT_FALSE(scalability_mode_string.empty());
EXPECT_EQ(ScalabilityModeFromString(scalability_mode_string),
scalability_mode);
}
}
struct TestParams {
std::string scalability_mode;
std::vector<std::tuple<std::vector<int>, std::string>>
limited_scalability_mode;
};
class NumSpatialLayersTest : public ::testing::TestWithParam<TestParams> {};
INSTANTIATE_TEST_SUITE_P(
MaxLayers,
NumSpatialLayersTest,
::testing::ValuesIn<TestParams>(
{{"L1T1", {{{0, 1}, "L1T1"}, {{2}, "L1T1"}, {{3}, "L1T1"}}},
{"L1T2", {{{0, 1}, "L1T2"}, {{2}, "L1T2"}, {{3}, "L1T2"}}},
{"L1T3", {{{0, 1}, "L1T3"}, {{2}, "L1T3"}, {{3}, "L1T3"}}},
{"L2T1", {{{0, 1}, "L1T1"}, {{2}, "L2T1"}, {{3}, "L2T1"}}},
{"L2T1h", {{{0, 1}, "L1T1"}, {{2}, "L2T1h"}, {{3}, "L2T1h"}}},
{"L2T1_KEY", {{{0, 1}, "L1T1"}, {{2}, "L2T1_KEY"}, {{3}, "L2T1_KEY"}}},
{"L2T2", {{{0, 1}, "L1T2"}, {{2}, "L2T2"}, {{3}, "L2T2"}}},
{"L2T2h", {{{0, 1}, "L1T2"}, {{2}, "L2T2h"}, {{3}, "L2T2h"}}},
{"L2T2_KEY", {{{0, 1}, "L1T2"}, {{2}, "L2T2_KEY"}, {{3}, "L2T2_KEY"}}},
{"L2T2_KEY_SHIFT",
{{{0, 1}, "L1T2"}, {{2}, "L2T2_KEY_SHIFT"}, {{3}, "L2T2_KEY_SHIFT"}}},
{"L2T3", {{{0, 1}, "L1T3"}, {{2}, "L2T3"}, {{3}, "L2T3"}}},
{"L2T3h", {{{0, 1}, "L1T3"}, {{2}, "L2T3h"}, {{3}, "L2T3h"}}},
{"L2T3_KEY", {{{0, 1}, "L1T3"}, {{2}, "L2T3_KEY"}, {{3}, "L2T3_KEY"}}},
{"L3T1", {{{0, 1}, "L1T1"}, {{2}, "L2T1"}, {{3}, "L3T1"}}},
{"L3T1h", {{{0, 1}, "L1T1"}, {{2}, "L2T1h"}, {{3}, "L3T1h"}}},
{"L3T1_KEY", {{{0, 1}, "L1T1"}, {{2}, "L2T1_KEY"}, {{3}, "L3T1_KEY"}}},
{"L3T2", {{{0, 1}, "L1T2"}, {{2}, "L2T2"}, {{3}, "L3T2"}}},
{"L3T2h", {{{0, 1}, "L1T2"}, {{2}, "L2T2h"}, {{3}, "L3T2h"}}},
{"L3T2_KEY", {{{0, 1}, "L1T2"}, {{2}, "L2T2_KEY"}, {{3}, "L3T2_KEY"}}},
{"L3T3", {{{0, 1}, "L1T3"}, {{2}, "L2T3"}, {{3}, "L3T3"}}},
{"L3T3h", {{{0, 1}, "L1T3"}, {{2}, "L2T3h"}, {{3}, "L3T3h"}}},
{"L3T3_KEY", {{{0, 1}, "L1T3"}, {{2}, "L2T3_KEY"}, {{3}, "L3T3_KEY"}}},
{"S2T1", {{{0, 1}, "L1T1"}, {{2}, "S2T1"}, {{3}, "S2T1"}}},
{"S2T1h", {{{0, 1}, "L1T1"}, {{2}, "S2T1h"}, {{3}, "S2T1h"}}},
{"S2T2", {{{0, 1}, "L1T2"}, {{2}, "S2T2"}, {{3}, "S2T2"}}},
{"S2T2h", {{{0, 1}, "L1T2"}, {{2}, "S2T2h"}, {{3}, "S2T2h"}}},
{"S2T3", {{{0, 1}, "L1T3"}, {{2}, "S2T3"}, {{3}, "S2T3"}}},
{"S2T3h", {{{0, 1}, "L1T3"}, {{2}, "S2T3h"}, {{3}, "S2T3h"}}},
{"S3T1", {{{0, 1}, "L1T1"}, {{2}, "S2T1"}, {{3}, "S3T1"}}},
{"S3T1h", {{{0, 1}, "L1T1"}, {{2}, "S2T1h"}, {{3}, "S3T1h"}}},
{"S3T2", {{{0, 1}, "L1T2"}, {{2}, "S2T2"}, {{3}, "S3T2"}}},
{"S3T2h", {{{0, 1}, "L1T2"}, {{2}, "S2T2h"}, {{3}, "S3T2h"}}},
{"S3T3", {{{0, 1}, "L1T3"}, {{2}, "S2T3"}, {{3}, "S3T3"}}},
{"S3T3h", {{{0, 1}, "L1T3"}, {{2}, "S2T3h"}, {{3}, "S3T3h"}}}}),
[](const ::testing::TestParamInfo<TestParams>& info) {
return info.param.scalability_mode;
});
TEST_P(NumSpatialLayersTest, LimitsSpatialLayers) {
const ScalabilityMode mode =
*ScalabilityModeFromString(GetParam().scalability_mode);
for (const auto& param : GetParam().limited_scalability_mode) {
const std::vector<int> max_num_spatial_layers =
std::get<std::vector<int>>(param);
const ScalabilityMode expected_mode =
*ScalabilityModeFromString(std::get<std::string>(param));
for (const auto& max_layers : max_num_spatial_layers) {
EXPECT_EQ(expected_mode, LimitNumSpatialLayers(mode, max_layers));
}
}
}
} // namespace
} // namespace webrtc
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