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hle: nvflinger: Move implementation for Parcel to its own header.
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2 changed files with 172 additions and 0 deletions
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@ -543,6 +543,7 @@ add_library(core STATIC
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hle/service/nvflinger/consumer_listener.h
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hle/service/nvflinger/nvflinger.cpp
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hle/service/nvflinger/nvflinger.h
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hle/service/nvflinger/parcel.h
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hle/service/nvflinger/pixel_format.h
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hle/service/nvflinger/producer_listener.h
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hle/service/nvflinger/status.h
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171
src/core/hle/service/nvflinger/parcel.h
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171
src/core/hle/service/nvflinger/parcel.h
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@ -0,0 +1,171 @@
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// SPDX-License-Identifier: GPL-3.0-or-later
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// Copyright 2021 yuzu Emulator Project
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#pragma once
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#include <memory>
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#include <vector>
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#include "common/alignment.h"
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#include "common/assert.h"
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#include "common/common_types.h"
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namespace android {
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class Parcel final {
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public:
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static constexpr std::size_t DefaultBufferSize = 0x40;
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Parcel() : buffer(DefaultBufferSize) {}
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template <typename T>
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explicit Parcel(const T& out_data) : buffer(DefaultBufferSize) {
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Write(out_data);
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}
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explicit Parcel(std::vector<u8> in_data) : buffer(std::move(in_data)) {
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DeserializeHeader();
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[[maybe_unused]] const std::u16string token = ReadInterfaceToken();
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}
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template <typename T>
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void Read(T& val) {
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static_assert(std::is_trivially_copyable_v<T>, "T must be trivially copyable.");
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ASSERT(read_index + sizeof(T) <= buffer.size());
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std::memcpy(&val, buffer.data() + read_index, sizeof(T));
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read_index += sizeof(T);
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read_index = Common::AlignUp(read_index, 4);
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}
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template <typename T>
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T Read() {
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T val;
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Read(val);
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return val;
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}
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template <typename T>
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void ReadFlattened(T& val) {
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const auto flattened_size = Read<s64>();
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ASSERT(sizeof(T) == flattened_size);
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Read(val);
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}
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template <typename T>
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T ReadFlattened() {
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T val;
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ReadFlattened(val);
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return val;
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}
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template <typename T>
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T ReadUnaligned() {
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static_assert(std::is_trivially_copyable_v<T>, "T must be trivially copyable.");
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ASSERT(read_index + sizeof(T) <= buffer.size());
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T val;
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std::memcpy(&val, buffer.data() + read_index, sizeof(T));
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read_index += sizeof(T);
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return val;
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}
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template <typename T>
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const std::shared_ptr<T> ReadObject() {
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static_assert(std::is_trivially_copyable_v<T>, "T must be trivially copyable.");
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const auto is_valid{Read<bool>()};
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if (is_valid) {
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auto result = std::make_shared<T>();
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ReadFlattened(*result);
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return result;
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}
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return {};
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}
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std::u16string ReadInterfaceToken() {
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[[maybe_unused]] const u32 unknown = Read<u32>();
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const u32 length = Read<u32>();
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std::u16string token{};
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for (u32 ch = 0; ch < length + 1; ++ch) {
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token.push_back(ReadUnaligned<u16>());
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}
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read_index = Common::AlignUp(read_index, 4);
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return token;
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}
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template <typename T>
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void Write(const T& val) {
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static_assert(std::is_trivially_copyable_v<T>, "T must be trivially copyable.");
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if (buffer.size() < write_index + sizeof(T)) {
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buffer.resize(buffer.size() + sizeof(T) + DefaultBufferSize);
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}
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std::memcpy(buffer.data() + write_index, &val, sizeof(T));
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write_index += sizeof(T);
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write_index = Common::AlignUp(write_index, 4);
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}
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template <typename T>
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void WriteObject(const T* ptr) {
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static_assert(std::is_trivially_copyable_v<T>, "T must be trivially copyable.");
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if (!ptr) {
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Write<u32>(0);
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return;
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}
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Write<u32>(1);
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Write<s64>(sizeof(T));
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Write(*ptr);
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}
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template <typename T>
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void WriteObject(const std::shared_ptr<T> ptr) {
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WriteObject(ptr.get());
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}
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void DeserializeHeader() {
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ASSERT(buffer.size() > sizeof(Header));
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Header header{};
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std::memcpy(&header, buffer.data(), sizeof(Header));
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read_index = header.data_offset;
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}
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std::vector<u8> Serialize() const {
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ASSERT(read_index == 0);
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Header header{};
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header.data_size = static_cast<u32>(write_index - sizeof(Header));
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header.data_offset = sizeof(Header);
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header.objects_size = 4;
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header.objects_offset = static_cast<u32>(sizeof(Header) + header.data_size);
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std::memcpy(buffer.data(), &header, sizeof(Header));
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return buffer;
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}
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private:
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struct Header {
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u32 data_size;
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u32 data_offset;
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u32 objects_size;
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u32 objects_offset;
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};
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static_assert(sizeof(Header) == 16, "ParcelHeader has wrong size");
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mutable std::vector<u8> buffer;
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std::size_t read_index = 0;
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std::size_t write_index = sizeof(Header);
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};
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} // namespace android
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