mirror of
https://github.com/gnif/LookingGlass.git
synced 2024-11-14 10:08:24 +00:00
304 lines
7.9 KiB
C++
304 lines
7.9 KiB
C++
/**
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* Looking Glass
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* Copyright © 2017-2024 The Looking Glass Authors
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* https://looking-glass.io
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "CSwapChainProcessor.h"
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#include <avrt.h>
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#include "Debug.h"
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#define LOCK(lock) \
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while (InterlockedCompareExchange((volatile LONG*)&(lock), 1, 0) != 0) {};
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#define UNLOCK(lock) \
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InterlockedExchange((volatile LONG*)&(lock), 0);
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#define LOCK_CONTEXT() LOCK(m_contextLock);
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#define UNLOCK_CONTEXT() UNLOCK(m_contextLock);
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#define LOCK_ST(st) LOCK((st).lock);
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#define UNLOCK_ST(st) UNLOCK((st).lock);
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CSwapChainProcessor::CSwapChainProcessor(CIndirectDeviceContext* devContext, IDDCX_SWAPCHAIN hSwapChain,
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std::shared_ptr<Direct3DDevice> device, HANDLE newFrameEvent) :
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m_devContext(devContext),
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m_hSwapChain(hSwapChain),
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m_device(device),
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m_newFrameEvent(newFrameEvent)
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{
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m_terminateEvent.Attach(CreateEvent(nullptr, FALSE, FALSE, nullptr));
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m_thread[0].Attach(CreateThread(nullptr, 0, _SwapChainThread, this, 0, nullptr));
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m_thread[1].Attach(CreateThread(nullptr, 0, _FrameThread , this, 0, nullptr));
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}
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CSwapChainProcessor::~CSwapChainProcessor()
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{
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SetEvent(m_terminateEvent.Get());
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if (m_thread[0].Get())
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WaitForSingleObject(m_thread[0].Get(), INFINITE);
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if (m_thread[1].Get())
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WaitForSingleObject(m_thread[1].Get(), INFINITE);
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for(int i = 0; i < STAGING_TEXTURES; ++i)
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if (m_cpuTex[i].map.pData)
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{
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m_device->m_context->Unmap(m_cpuTex[i].tex.Get(), 0);
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m_cpuTex[i].map.pData = nullptr;
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}
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}
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DWORD CALLBACK CSwapChainProcessor::_SwapChainThread(LPVOID arg)
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{
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reinterpret_cast<CSwapChainProcessor*>(arg)->SwapChainThread();
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return 0;
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}
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void CSwapChainProcessor::SwapChainThread()
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{
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DWORD avTask = 0;
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HANDLE avTaskHandle = AvSetMmThreadCharacteristicsW(L"Distribution", &avTask);
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DBGPRINT("Start");
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SwapChainThreadCore();
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WdfObjectDelete((WDFOBJECT)m_hSwapChain);
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m_hSwapChain = nullptr;
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AvRevertMmThreadCharacteristics(avTaskHandle);
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}
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void CSwapChainProcessor::SwapChainThreadCore()
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{
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Microsoft::WRL::ComPtr<IDXGIDevice> dxgiDevice;
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HRESULT hr = m_device->m_device.As(&dxgiDevice);
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if (FAILED(hr))
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{
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DBGPRINT("Failed to get the dxgiDevice");
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return;
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}
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if (IDD_IS_FUNCTION_AVAILABLE(IddCxSetRealtimeGPUPriority))
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{
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DBGPRINT("Using IddCxSetRealtimeGPUPriority");
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IDARG_IN_SETREALTIMEGPUPRIORITY arg;
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arg.pDevice = dxgiDevice.Get();
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if (FAILED(IddCxSetRealtimeGPUPriority(m_hSwapChain, &arg)))
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DBGPRINT("Failed to set realtime GPU thread priority");
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}
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else
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{
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DBGPRINT("Using SetGPUThreadPriority");
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dxgiDevice->SetGPUThreadPriority(7);
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}
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IDARG_IN_SWAPCHAINSETDEVICE setDevice = {};
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setDevice.pDevice = dxgiDevice.Get();
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LOCK_CONTEXT();
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hr = IddCxSwapChainSetDevice(m_hSwapChain, &setDevice);
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UNLOCK_CONTEXT();
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if (FAILED(hr))
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{
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DBGPRINT("IddCxSwapChainSetDevice Failed (%08x)", hr);
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return;
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}
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UINT lastFrameNumber = 0;
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for (;;)
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{
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ComPtr<IDXGIResource> acquiredBuffer;
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IDARG_OUT_RELEASEANDACQUIREBUFFER buffer = {};
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LOCK_CONTEXT();
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hr = IddCxSwapChainReleaseAndAcquireBuffer(m_hSwapChain, &buffer);
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if (hr == E_PENDING)
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{
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UNLOCK_CONTEXT();
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HANDLE waitHandles[] =
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{
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m_newFrameEvent,
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m_terminateEvent.Get()
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};
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DWORD waitResult = WaitForMultipleObjects(ARRAYSIZE(waitHandles), waitHandles, FALSE, 17);
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if (waitResult == WAIT_OBJECT_0 || waitResult == WAIT_TIMEOUT)
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continue;
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else if (waitResult == WAIT_OBJECT_0 + 1)
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break;
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else
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{
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hr = HRESULT_FROM_WIN32(waitResult);
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break;
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}
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}
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else if (SUCCEEDED(hr))
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{
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if (buffer.MetaData.PresentationFrameNumber != lastFrameNumber)
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{
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lastFrameNumber = buffer.MetaData.PresentationFrameNumber;
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if (m_copyCount < STAGING_TEXTURES)
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{
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acquiredBuffer.Attach(buffer.MetaData.pSurface);
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SwapChainNewFrame(acquiredBuffer);
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acquiredBuffer.Reset();
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}
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}
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hr = IddCxSwapChainFinishedProcessingFrame(m_hSwapChain);
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UNLOCK_CONTEXT();
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if (FAILED(hr))
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break;
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}
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else
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{
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UNLOCK_CONTEXT();
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break;
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}
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}
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}
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void CSwapChainProcessor::SwapChainNewFrame(ComPtr<IDXGIResource> acquiredBuffer)
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{
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Microsoft::WRL::ComPtr<ID3D11Texture2D> texture;
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if (FAILED(acquiredBuffer->QueryInterface(__uuidof(ID3D11Texture2D), (void**)&texture)))
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{
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DBGPRINT("Failed to obtain the ID3D11Texture2D from the acquiredBuffer");
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return;
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}
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D3D11_TEXTURE2D_DESC desc;
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texture->GetDesc(&desc);
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StagingTexture &st = m_cpuTex[m_texWIndex];
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if (st.map.pData)
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{
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m_device->m_context->Unmap(st.tex.Get(), 0);
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st.map.pData = nullptr;
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}
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if (!SetupStagingTexture(st, desc.Width, desc.Height, desc.Format))
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return;
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m_device->m_context->CopyResource(st.tex.Get(), texture.Get());
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InterlockedAdd(&m_copyCount, 1);
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if (++m_texWIndex == STAGING_TEXTURES)
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m_texWIndex = 0;
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}
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DWORD CALLBACK CSwapChainProcessor::_FrameThread(LPVOID arg)
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{
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reinterpret_cast<CSwapChainProcessor*>(arg)->FrameThread();
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return 0;
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}
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void CSwapChainProcessor::FrameThread()
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{
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for(;;)
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{
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if (WaitForSingleObject(m_terminateEvent.Get(), 0) == WAIT_OBJECT_0)
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break;
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if (!m_copyCount)
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{
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Sleep(0);
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continue;
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}
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StagingTexture & st = m_cpuTex[m_texRIndex];
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LOCK(st);
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LOCK_CONTEXT();
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HRESULT status = m_device->m_context->Map(st.tex.Get(), 0, D3D11_MAP_READ,
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D3D11_MAP_FLAG_DO_NOT_WAIT, &st.map);
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UNLOCK_CONTEXT();
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if (FAILED(status))
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{
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UNLOCK(st);
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if (status == DXGI_ERROR_WAS_STILL_DRAWING)
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continue;
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DBGPRINT("Failed to map staging texture");
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InterlockedAdd(&m_copyCount, -1);
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if (++m_texRIndex == STAGING_TEXTURES)
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m_texRIndex = 0;
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continue;
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}
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m_devContext->SendFrame(st.width, st.height, st.map.RowPitch, st.format, st.map.pData);
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InterlockedAdd(&m_copyCount, -1);
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m_lastIndex = m_texRIndex;
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if (++m_texRIndex == STAGING_TEXTURES)
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m_texRIndex = 0;
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UNLOCK(st);
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}
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}
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bool CSwapChainProcessor::SetupStagingTexture(StagingTexture & st, int width, int height, DXGI_FORMAT format)
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{
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if (st.width == width && st.height == height && st.format == format)
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return true;
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st.tex.Reset();
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st.width = width;
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st.height = height;
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st.format = format;
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D3D11_TEXTURE2D_DESC desc = {};
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desc.Width = width;
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desc.Height = height;
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desc.MipLevels = 1;
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desc.ArraySize = 1;
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desc.SampleDesc.Count = 1;
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desc.SampleDesc.Quality = 0;
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desc.Usage = D3D11_USAGE_STAGING;
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desc.Format = format;
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desc.BindFlags = 0;
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desc.CPUAccessFlags = D3D11_CPU_ACCESS_READ;
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desc.MiscFlags = 0;
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if (FAILED(m_device->m_device->CreateTexture2D(&desc, nullptr, &st.tex)))
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{
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DBGPRINT("Failed to create staging texture");
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return false;
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}
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return true;
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}
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void CSwapChainProcessor::ResendLastFrame()
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{
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LOCK_CONTEXT()
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StagingTexture & st = m_cpuTex[m_lastIndex];
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LOCK_ST(st);
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UNLOCK_CONTEXT();
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if (!st.map.pData)
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{
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UNLOCK_ST(st);
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return;
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}
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m_devContext->SendFrame(st.width, st.height, st.map.RowPitch, st.format, st.map.pData);
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UNLOCK_ST(st);
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} |