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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/segmentation_platform/embedder/default_model/device_tier_segment.h"
#include <array>
#include "base/feature_list.h"
#include "base/metrics/field_trial_params.h"
#include "base/task/sequenced_task_runner.h"
#include "components/segmentation_platform/internal/metadata/metadata_writer.h"
#include "components/segmentation_platform/public/config.h"
#include "components/segmentation_platform/public/constants.h"
#include "components/segmentation_platform/public/features.h"
#include "components/segmentation_platform/public/model_provider.h"
#include "components/segmentation_platform/public/proto/model_metadata.pb.h"
namespace segmentation_platform {
namespace {
using proto::SegmentId;
// Default parameters for device tier model.
constexpr uint64_t kDeviceTierSegmentVersion = 1;
constexpr SegmentId kDeviceTierSegmentId = SegmentId::DEVICE_TIER_SEGMENT;
constexpr int64_t kDeviceTierSegmentSignalStorageLength = 28;
constexpr int64_t kDeviceTierSegmentMinSignalCollectionLength = 0;
} // namespace
// static
std::unique_ptr<Config> DeviceTierSegment::GetConfig() {
if (!base::FeatureList::IsEnabled(
features::kSegmentationPlatformDeviceTier)) {
return nullptr;
}
auto config = std::make_unique<Config>();
config->segmentation_key = kDeviceTierKey;
config->segmentation_uma_name = kDeviceTierUmaName;
config->auto_execute_and_cache = true;
config->AddSegmentId(kDeviceTierSegmentId,
std::make_unique<DeviceTierSegment>());
config->is_boolean_segment = true;
return config;
}
DeviceTierSegment::DeviceTierSegment()
: DefaultModelProvider(kDeviceTierSegmentId) {}
std::unique_ptr<DefaultModelProvider::ModelConfig>
DeviceTierSegment::GetModelConfig() {
proto::SegmentationModelMetadata device_tier_metadata;
MetadataWriter writer(&device_tier_metadata);
writer.SetDefaultSegmentationMetadataConfig(
kDeviceTierSegmentMinSignalCollectionLength,
kDeviceTierSegmentSignalStorageLength);
// Adding custom inputs.
writer.AddCustomInput(MetadataWriter::CustomInput{
.tensor_length = 1,
.fill_policy = proto::CustomInput::FILL_DEVICE_RAM_MB,
.name = "DeviceRAMInMB"});
writer.AddCustomInput(MetadataWriter::CustomInput{
.tensor_length = 1,
.fill_policy = proto::CustomInput::FILL_DEVICE_OS_VERSION_NUMBER,
.name = "DeviceOSVersionNumber"});
writer.AddCustomInput(MetadataWriter::CustomInput{
.tensor_length = 1,
.fill_policy = proto::CustomInput::FILL_DEVICE_PPI,
.name = "DevicePPI"});
// Set OutputConfig.
writer.AddOutputConfigForBinnedClassifier(
/*bins=*/{{1, kDeviceTierSegmentLabelLow},
{2, kDeviceTierSegmentLabelMedium},
{3, kDeviceTierSegmentLabelHigh}},
/*underflow_label=*/kDeviceTierSegmentLabelNone);
writer.AddPredictedResultTTLInOutputConfig(
/*top_label_to_ttl_list=*/{}, /*default_ttl=*/7,
/*time_unit=*/proto::TimeUnit::DAY);
return std::make_unique<ModelConfig>(std::move(device_tier_metadata),
kDeviceTierSegmentVersion);
}
void DeviceTierSegment::ExecuteModelWithInput(
const ModelProvider::Request& inputs,
ExecutionCallback callback) {
// Invalid inputs.
if (inputs.size() != 3) {
base::SequencedTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE, base::BindOnce(std::move(callback), std::nullopt));
return;
}
float score = 0;
float device_ram_in_gb = inputs[0] / 1024;
float device_os_version = inputs[1];
float device_ppi = inputs[2];
if ((device_ram_in_gb >= 8 && device_os_version >= 10 && device_ppi > 370) ||
(device_ram_in_gb >= 6 && device_os_version >= 11 && device_ppi > 370)) {
score = 3;
} else if ((device_ram_in_gb >= 6 &&
(device_os_version < 11 || device_ppi <= 370)) ||
(device_ram_in_gb > 2 && device_os_version >= 10)) {
score = 2;
} else if (device_ram_in_gb >= 1 && device_os_version >= 1) {
score = 1;
} else {
score = 0;
}
base::SequencedTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE,
base::BindOnce(std::move(callback), ModelProvider::Response(1, score)));
}
} // namespace segmentation_platform
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