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obs-StreamFX/source/nvidia/ar/nvidia-ar.cpp
Michael Fabian 'Xaymar' Dirks 913ac4b309 nvidia/ar: Add modern wrapper for Maxine AR SDK
2023-04-05 18:51:35 +02:00

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// Copyright (c) 2021 Michael Fabian Dirks <info@xaymar.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#include "nvidia-ar.hpp"
#include <filesystem>
#include <mutex>
#include "nvidia/cuda/nvidia-cuda-obs.hpp"
#include "obs/gs/gs-helper.hpp"
#include "util/util-logging.hpp"
#include "util/util-platform.hpp"
#ifdef _DEBUG
#define ST_PREFIX "<%s> "
#define D_LOG_ERROR(x, ...) P_LOG_ERROR(ST_PREFIX##x, __FUNCTION_SIG__, __VA_ARGS__)
#define D_LOG_WARNING(x, ...) P_LOG_WARN(ST_PREFIX##x, __FUNCTION_SIG__, __VA_ARGS__)
#define D_LOG_INFO(x, ...) P_LOG_INFO(ST_PREFIX##x, __FUNCTION_SIG__, __VA_ARGS__)
#define D_LOG_DEBUG(x, ...) P_LOG_DEBUG(ST_PREFIX##x, __FUNCTION_SIG__, __VA_ARGS__)
#else
#define ST_PREFIX "<nvidia::ar::ar> "
#define D_LOG_ERROR(...) P_LOG_ERROR(ST_PREFIX __VA_ARGS__)
#define D_LOG_WARNING(...) P_LOG_WARN(ST_PREFIX __VA_ARGS__)
#define D_LOG_INFO(...) P_LOG_INFO(ST_PREFIX __VA_ARGS__)
#define D_LOG_DEBUG(...) P_LOG_DEBUG(ST_PREFIX __VA_ARGS__)
#endif
#ifdef WIN32
#include <KnownFolders.h>
#include <ShlObj.h>
#include <Windows.h>
#define ST_LIBRARY_NAME "nvARPose.dll"
#else
#define ST_LIBRARY_NAME "libnvARPose.so"
#endif
#define P_NVAR_LOAD_SYMBOL(NAME) \
{ \
NAME = reinterpret_cast<decltype(NAME)>(_library->load_symbol(#NAME)); \
if (!NAME) \
throw std::runtime_error("Failed to load '" #NAME "' from '" ST_LIBRARY_NAME "'."); \
}
streamfx::nvidia::ar::ar::~ar()
{
D_LOG_DEBUG("Finalizing... (Addr: 0x%" PRIuPTR ")", this);
#ifdef WIN32
// Remove the DLL directory from the library loader paths.
if (_extra != nullptr) {
RemoveDllDirectory(reinterpret_cast<DLL_DIRECTORY_COOKIE>(_extra));
}
#endif
{ // The library may need to release Graphics and CUDA resources.
auto gctx = ::streamfx::obs::gs::context();
auto cctx = ::streamfx::nvidia::cuda::obs::get()->get_context()->enter();
_library.reset();
}
}
streamfx::nvidia::ar::ar::ar() : _library(), _model_path()
{
std::filesystem::path sdk_path;
auto gctx = ::streamfx::obs::gs::context();
auto cctx = ::streamfx::nvidia::cuda::obs::get()->get_context()->enter();
D_LOG_DEBUG("Initializating... (Addr: 0x%" PRIuPTR ")", this);
// Figure out where the Augmented Reality SDK is, if it is installed.
#ifdef WIN32
{
// NVAR SDK only defines NVAR_MODEL_PATH, so we'll use that as our baseline.
DWORD env_size = GetEnvironmentVariableW(L"NVAR_MODEL_PATH", nullptr, 0);
if (env_size > 0) {
std::vector<wchar_t> buffer(static_cast<size_t>(env_size) + 1, 0);
env_size = GetEnvironmentVariableW(L"NVAR_MODEL_PATH", buffer.data(), buffer.size());
_model_path = std::wstring(buffer.data(), buffer.size());
// The SDK is location one directory "up" from the model path.
sdk_path = std::filesystem::path(_model_path) / "..";
}
// If the environment variable wasn't set and our model path is still undefined, guess!
if (sdk_path.empty()) {
PWSTR str = nullptr;
HRESULT res = SHGetKnownFolderPath(FOLDERID_ProgramFiles, KF_FLAG_DEFAULT, nullptr, &str);
if (res == S_OK) {
sdk_path = std::wstring(str);
sdk_path /= "NVIDIA Corporation";
sdk_path /= "NVIDIA AR SDK";
CoTaskMemFree(str);
// Model path is in 'models' subdirectory.
_model_path = sdk_path;
_model_path /= "models";
}
}
// Figure out absolute paths to everything.
_model_path = streamfx::util::platform::native_to_utf8(std::filesystem::absolute(_model_path));
sdk_path = streamfx::util::platform::native_to_utf8(std::filesystem::absolute(sdk_path));
}
#else
throw std::runtime_error("Not yet implemented.");
#endif
// Check if any of the found paths are valid.
if (!std::filesystem::exists(sdk_path)) {
D_LOG_ERROR("No supported NVIDIA SDK is installed to provide '%s'.", ST_LIBRARY_NAME);
throw std::runtime_error("Failed to load '" ST_LIBRARY_NAME "'.");
}
// Try and load the library.
{
#ifdef WIN32
// On platforms where it is possible, modify the linker directories.
DLL_DIRECTORY_COOKIE ck = AddDllDirectory(sdk_path.wstring().c_str());
_extra = reinterpret_cast<void*>(ck);
if (ck == 0) {
DWORD ec = GetLastError();
std::string error;
{
LPWSTR str;
FormatMessageW(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER
| FORMAT_MESSAGE_IGNORE_INSERTS,
nullptr, ec, MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US),
reinterpret_cast<LPWSTR>(&str), 0, nullptr);
error = ::streamfx::util::platform::native_to_utf8(std::wstring(str));
LocalFree(str);
}
D_LOG_WARNING("Failed to add '%'s to the library loader paths with error: %s (Code %" PRIu32 ")",
sdk_path.string().c_str(), error.c_str(), ec);
}
#endif
std::filesystem::path paths[] = {
ST_LIBRARY_NAME,
std::filesystem::path(sdk_path) / ST_LIBRARY_NAME,
};
for (auto path : paths) {
try {
_library = ::streamfx::util::library::load(path);
} catch (std::exception const& ex) {
D_LOG_ERROR("Failed to load '%s' with error: %s", path.string().c_str(), ex.what());
} catch (...) {
D_LOG_ERROR("Failed to load '%s'.", path.string().c_str());
}
if (_library) {
break;
}
}
if (!_library) {
#ifdef WIN32
// Remove the DLL directory from the library loader paths.
if (_extra != nullptr) {
RemoveDllDirectory(reinterpret_cast<DLL_DIRECTORY_COOKIE>(_extra));
}
#endif
throw std::runtime_error("Failed to load " ST_LIBRARY_NAME ".");
}
}
{ // Load Symbols
P_NVAR_LOAD_SYMBOL(NvAR_GetVersion);
P_NVAR_LOAD_SYMBOL(NvAR_Create);
P_NVAR_LOAD_SYMBOL(NvAR_Destroy);
P_NVAR_LOAD_SYMBOL(NvAR_Run);
P_NVAR_LOAD_SYMBOL(NvAR_Load);
P_NVAR_LOAD_SYMBOL(NvAR_GetS32);
P_NVAR_LOAD_SYMBOL(NvAR_SetS32);
P_NVAR_LOAD_SYMBOL(NvAR_GetU32);
P_NVAR_LOAD_SYMBOL(NvAR_SetU32);
P_NVAR_LOAD_SYMBOL(NvAR_GetU64);
P_NVAR_LOAD_SYMBOL(NvAR_SetU64);
P_NVAR_LOAD_SYMBOL(NvAR_GetF32);
P_NVAR_LOAD_SYMBOL(NvAR_SetF32);
P_NVAR_LOAD_SYMBOL(NvAR_GetF64);
P_NVAR_LOAD_SYMBOL(NvAR_SetF64);
P_NVAR_LOAD_SYMBOL(NvAR_GetString);
P_NVAR_LOAD_SYMBOL(NvAR_SetString);
P_NVAR_LOAD_SYMBOL(NvAR_GetCudaStream);
P_NVAR_LOAD_SYMBOL(NvAR_SetCudaStream);
P_NVAR_LOAD_SYMBOL(NvAR_GetObject);
P_NVAR_LOAD_SYMBOL(NvAR_SetObject);
P_NVAR_LOAD_SYMBOL(NvAR_GetF32Array);
P_NVAR_LOAD_SYMBOL(NvAR_SetF32Array);
}
{ // Assign proper GPU.
auto cctx = ::streamfx::nvidia::cuda::obs::get()->get_context()->enter();
NvAR_SetU32(nullptr, P_NVAR_CONFIG "GPU", 0);
}
}
std::filesystem::path const& streamfx::nvidia::ar::ar::get_model_path()
{
return _model_path;
}
std::shared_ptr<streamfx::nvidia::ar::ar> streamfx::nvidia::ar::ar::get()
{
static std::weak_ptr<streamfx::nvidia::ar::ar> instance;
static std::mutex lock;
std::unique_lock<std::mutex> ul(lock);
if (instance.expired()) {
auto hard_instance = std::make_shared<streamfx::nvidia::ar::ar>();
instance = hard_instance;
return hard_instance;
}
return instance.lock();
}
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