obs-StreamFX/source/nvidia/cuda/nvidia-cuda-context.cpp

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/*
* Modern effects for a modern Streamer
* Copyright (C) 2020 Michael Fabian Dirks
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "nvidia-cuda-context.hpp"
#include <stdexcept>
#ifdef WIN32
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable : 4191 4365 4777 5039 5204)
#endif
#include <atlutil.h>
#ifdef _MSC_VER
#pragma warning(pop)
#endif
#endif
nvidia::cuda::context::context(std::shared_ptr<::nvidia::cuda::cuda> cuda)
: _cuda(cuda), _ctx(), _has_device(false), _device()
{
if (!cuda)
throw std::invalid_argument("cuda");
}
nvidia::cuda::context::~context()
{
if (_has_device) {
_cuda->cuDevicePrimaryCtxRelease(_device);
}
_cuda->cuCtxDestroy(_ctx);
}
#ifdef WIN32
nvidia::cuda::context::context(std::shared_ptr<::nvidia::cuda::cuda> cuda, ID3D11Device* device) : context(cuda)
{
using namespace nvidia::cuda;
if (!device)
throw std::invalid_argument("device");
// Get DXGI Device
IDXGIDevice* dxgi_device; // Don't use ATL::CComPtr
device->QueryInterface(__uuidof(IDXGIDevice), (void**)&dxgi_device);
// Get DXGI Adapter
ATL::CComPtr<IDXGIAdapter> dxgi_adapter;
dxgi_device->GetAdapter(&dxgi_adapter);
// Get Device Index
if (cu_result res = _cuda->cuD3D11GetDevice(&_device, dxgi_adapter); res != cu_result::SUCCESS) {
throw std::runtime_error("Failed to get device index for device.");
}
// Acquire Context
if (cu_result res = _cuda->cuDevicePrimaryCtxRetain(&_ctx, _device); res != cu_result::SUCCESS) {
throw std::runtime_error("Failed to acquire primary device context.");
}
_has_device = true;
}
#endif
::nvidia::cuda::cu_context_t nvidia::cuda::context::get()
{
return _ctx;
}