bluetooth_low_energy_scan_filter.cc

// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "device/bluetooth/bluetooth_low_energy_scan_filter.h"

#include <optional>

#include "base/logging.h"
#include "base/memory/ptr_util.h"

namespace {

// These values can be found in the "BlueZ D-Bus Advertisement Monitor API
// Description": //third_party/bluez/current/doc/advertisement-monitor-api.txt
constexpr int16_t kRSSIThresholdMin = …;
constexpr int16_t kRSSIThresholdMax = …;
constexpr base::TimeDelta kTimeoutMin = …;
constexpr base::TimeDelta kTimeoutMax = …;
constexpr uint8_t kPatternValueMaxLength = …;
constexpr base::TimeDelta kRSSISamplingPeriodMin = …;
constexpr base::TimeDelta kRSSISamplingPeriodMax = …;

// These values are based on real-world testing with the goal that they will be
// as high as possible without any false negatives at 1.5/6/20 feet,
// respectively.
constexpr int16_t kImmediateDeviceFoundRSSIThreshold = …;
constexpr int16_t kImmediateDeviceLostRSSIThreshold = …;
constexpr int16_t kNearDeviceFoundRSSIThreshold = …;
constexpr int16_t kNearDeviceLostRSSIThreshold = …;
constexpr int16_t kFarDeviceFoundRSSIThreshold = …;
constexpr int16_t kFarDeviceLostRSSIThreshold = …;

int16_t GetDeviceFoundRSSIThreshold(
    device::BluetoothLowEnergyScanFilter::Range range) { … }

int16_t GetDeviceLostRSSIThreshold(
    device::BluetoothLowEnergyScanFilter::Range range) { … }

base::TimeDelta GetRoundedRSSISamplingPeriod(
    base::TimeDelta rssi_sampling_period) { … }

}  // namespace

namespace device {

BluetoothLowEnergyScanFilter::Pattern::Pattern(
    uint8_t start_position,
    AdvertisementDataType data_type,
    const std::vector<uint8_t>& value)
    : … { … }

BluetoothLowEnergyScanFilter::Pattern::Pattern(const Pattern&) = default;
BluetoothLowEnergyScanFilter::Pattern::~Pattern() = default;

bool BluetoothLowEnergyScanFilter::Pattern::IsValid() const { … }

// static
std::unique_ptr<BluetoothLowEnergyScanFilter>
BluetoothLowEnergyScanFilter::Create(
    Range device_range,
    base::TimeDelta device_found_timeout,
    base::TimeDelta device_lost_timeout,
    const std::vector<Pattern>& patterns,
    std::optional<base::TimeDelta> rssi_sampling_period) { … }

// static
std::unique_ptr<BluetoothLowEnergyScanFilter>
BluetoothLowEnergyScanFilter::Create(
    int16_t device_found_rssi_threshold,
    int16_t device_lost_rssi_threshold,
    base::TimeDelta device_found_timeout,
    base::TimeDelta device_lost_timeout,
    const std::vector<BluetoothLowEnergyScanFilter::Pattern>& patterns,
    std::optional<base::TimeDelta> rssi_sampling_period) { … }

BluetoothLowEnergyScanFilter::BluetoothLowEnergyScanFilter(
    int16_t device_found_rssi_threshold,
    int16_t device_lost_rssi_threshold,
    base::TimeDelta device_found_timeout,
    base::TimeDelta device_lost_timeout,
    std::vector<Pattern> patterns,
    std::optional<base::TimeDelta> rssi_sampling_period)
    : … { … }

BluetoothLowEnergyScanFilter::~BluetoothLowEnergyScanFilter() = default;

bool BluetoothLowEnergyScanFilter::IsValid() const { … }

}  // namespace device
chromium/device/bluetooth/bluetooth_low_energy_scan_filter.cc
