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* Copyright 2020 The Android Open Source Project
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#pragma once
#include <array>
#include <cstdint>
#include <optional>
#include <variant>
namespace android {
// NUL-terminated plug and play ID.
using PnpId = std::array<char, 4>;
// Product-specific information about the display or the directly connected device on the
// display chain. For example, if the display is transitively connected, this field may contain
// product information about the intermediate device.
struct DeviceProductInfo {
static constexpr size_t TEXT_BUFFER_SIZE = 20;
static constexpr size_t RELATIVE_ADDRESS_SIZE = 4;
using RelativeAddress = std::array<uint8_t, RELATIVE_ADDRESS_SIZE>;
static constexpr RelativeAddress NO_RELATIVE_ADDRESS = {0xff, 0xff, 0xff, 0xff};
struct ModelYear {
uint32_t year;
struct ManufactureYear : ModelYear {};
struct ManufactureWeekAndYear : ManufactureYear {
// 1-base week number. Week numbering may not be consistent between manufacturers.
uint8_t week;
// Display name.
std::array<char, TEXT_BUFFER_SIZE> name;
// Manufacturer Plug and Play ID.
PnpId manufacturerPnpId;
// Manufacturer product ID.
std::array<char, TEXT_BUFFER_SIZE> productId;
using ManufactureOrModelDate = std::variant<ModelYear, ManufactureYear, ManufactureWeekAndYear>;
ManufactureOrModelDate manufactureOrModelDate;
// Relative address in the display network. Unavailable address is indicated
// by all elements equal to 255.
// For example, for HDMI connected device this will be the physical address.
RelativeAddress relativeAddress;
} // namespace android