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/*
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// A sample program demonstrating interoperability of OpenCV cv::UMat with Direct X surface
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// At first, the data obtained from video file or camera and placed onto Direct X surface,
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// following mapping of this Direct X surface to OpenCV cv::UMat and call cv::Blur function.
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// The result is mapped back to Direct X surface and rendered through Direct X API.
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*/
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include <d3d9.h>
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#include "opencv2/core.hpp"
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#include "opencv2/core/directx.hpp"
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#include "opencv2/core/ocl.hpp"
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#include "opencv2/imgproc.hpp"
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#include "opencv2/videoio.hpp"
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#include "d3dsample.hpp"
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#pragma comment (lib, "d3d9.lib")
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class D3D9ExWinApp : public D3DSample
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{
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public:
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D3D9ExWinApp(int width, int height, std::string& window_name, cv::VideoCapture& cap) :
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D3DSample(width, height, window_name, cap) {}
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~D3D9ExWinApp() {}
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int create(void)
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{
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// base initialization
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D3DSample::create();
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// initialize DirectX
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HRESULT r;
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r = ::Direct3DCreate9Ex(D3D_SDK_VERSION, &m_pD3D9Ex);
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if (FAILED(r))
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{
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return EXIT_FAILURE;
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}
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DWORD flags = D3DCREATE_HARDWARE_VERTEXPROCESSING |
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D3DCREATE_PUREDEVICE |
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D3DCREATE_NOWINDOWCHANGES |
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D3DCREATE_MULTITHREADED |
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D3DCREATE_FPU_PRESERVE;
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D3DPRESENT_PARAMETERS d3dpp;
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::ZeroMemory(&d3dpp, sizeof(D3DPRESENT_PARAMETERS));
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d3dpp.Windowed = true;
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d3dpp.Flags = 0;
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d3dpp.BackBufferCount = 0;
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d3dpp.BackBufferFormat = D3DFMT_A8R8G8B8;
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d3dpp.BackBufferHeight = m_height;
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d3dpp.BackBufferWidth = m_width;
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d3dpp.MultiSampleType = D3DMULTISAMPLE_NONE;
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d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
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d3dpp.hDeviceWindow = m_hWnd;
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d3dpp.PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE;
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d3dpp.FullScreen_RefreshRateInHz = D3DPRESENT_RATE_DEFAULT;
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r = m_pD3D9Ex->CreateDeviceEx(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, m_hWnd, flags, &d3dpp, NULL, &m_pD3D9DevEx);
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if (FAILED(r))
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{
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return EXIT_FAILURE;
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}
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r = m_pD3D9DevEx->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &m_pBackBuffer);
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if (FAILED(r))
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{
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return EXIT_FAILURE;
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}
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r = m_pD3D9DevEx->CreateOffscreenPlainSurface(m_width, m_height, D3DFMT_A8R8G8B8, D3DPOOL_DEFAULT, &m_pSurface, NULL);
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if (FAILED(r))
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{
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std::cerr << "Can't create surface for result" << std::endl;
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return EXIT_FAILURE;
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}
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// initialize OpenCL context of OpenCV lib from DirectX
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if (cv::ocl::haveOpenCL())
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{
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m_oclCtx = cv::directx::ocl::initializeContextFromDirect3DDevice9(m_pD3D9DevEx);
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}
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m_oclDevName = cv::ocl::useOpenCL() ?
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cv::ocl::Context::getDefault().device(0).name() :
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"No OpenCL device";
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return EXIT_SUCCESS;
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} // create()
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// get media data on DX surface for further processing
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int get_surface(LPDIRECT3DSURFACE9* ppSurface)
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{
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HRESULT r;
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if (!m_cap.read(m_frame_bgr))
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return EXIT_FAILURE;
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cv::cvtColor(m_frame_bgr, m_frame_rgba, cv::COLOR_BGR2BGRA);
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D3DLOCKED_RECT memDesc = { 0, NULL };
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RECT rc = { 0, 0, m_width, m_height };
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r = m_pSurface->LockRect(&memDesc, &rc, 0);
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if (FAILED(r))
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{
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return r;
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}
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cv::Mat m(m_height, m_width, CV_8UC4, memDesc.pBits, memDesc.Pitch);
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// copy video frame data to surface
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m_frame_rgba.copyTo(m);
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r = m_pSurface->UnlockRect();
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if (FAILED(r))
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{
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return r;
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}
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*ppSurface = m_pSurface;
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return EXIT_SUCCESS;
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} // get_surface()
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// process and render media data
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int render()
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{
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try
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{
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if (m_shutdown)
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return EXIT_SUCCESS;
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// capture user input once
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MODE mode = m_mode == MODE_GPU_NV12 ? MODE_GPU_RGBA : m_mode;
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HRESULT r;
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LPDIRECT3DSURFACE9 pSurface;
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r = get_surface(&pSurface);
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if (FAILED(r))
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{
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return EXIT_FAILURE;
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}
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m_timer.reset();
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m_timer.start();
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switch (mode)
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{
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case MODE_CPU:
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{
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// process video frame on CPU
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D3DLOCKED_RECT memDesc = { 0, NULL };
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RECT rc = { 0, 0, m_width, m_height };
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r = pSurface->LockRect(&memDesc, &rc, 0);
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if (FAILED(r))
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{
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return EXIT_FAILURE;
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}
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cv::Mat m(m_height, m_width, CV_8UC4, memDesc.pBits, memDesc.Pitch);
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if (m_demo_processing)
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{
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// blur D3D9 surface with OpenCV on CPU
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cv::blur(m, m, cv::Size(15, 15));
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}
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r = pSurface->UnlockRect();
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if (FAILED(r))
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{
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return EXIT_FAILURE;
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}
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break;
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}
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case MODE_GPU_RGBA:
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{
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// process video frame on GPU
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cv::UMat u;
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cv::directx::convertFromDirect3DSurface9(pSurface, u);
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if (m_demo_processing)
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{
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// blur D3D9 surface with OpenCV on GPU with OpenCL
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cv::blur(u, u, cv::Size(15, 15));
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}
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cv::directx::convertToDirect3DSurface9(u, pSurface);
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break;
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}
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} // switch
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m_timer.stop();
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print_info(pSurface, m_mode, m_timer.getTimeMilli(), m_oclDevName);
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// traditional DX render pipeline:
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// BitBlt surface to backBuffer and flip backBuffer to frontBuffer
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r = m_pD3D9DevEx->StretchRect(pSurface, NULL, m_pBackBuffer, NULL, D3DTEXF_NONE);
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if (FAILED(r))
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{
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return EXIT_FAILURE;
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}
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// present the back buffer contents to the display
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r = m_pD3D9DevEx->Present(NULL, NULL, NULL, NULL);
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if (FAILED(r))
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{
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return EXIT_FAILURE;
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}
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} // try
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catch (cv::Exception& e)
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{
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std::cerr << "Exception: " << e.what() << std::endl;
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return 10;
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}
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return EXIT_SUCCESS;
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} // render()
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void print_info(LPDIRECT3DSURFACE9 pSurface, int mode, double time, cv::String oclDevName)
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{
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HDC hDC;
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HRESULT r = pSurface->GetDC(&hDC);
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if (FAILED(r))
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{
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return;
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}
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HFONT hFont = (HFONT)::GetStockObject(SYSTEM_FONT);
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HFONT hOldFont = (HFONT)::SelectObject(hDC, hFont);
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if (hOldFont)
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{
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TEXTMETRIC tm;
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::GetTextMetrics(hDC, &tm);
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char buf[256];
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int y = 0;
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buf[0] = 0;
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sprintf(buf, "mode: %s", m_modeStr[mode].c_str());
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::TextOut(hDC, 0, y, buf, (int)strlen(buf));
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y += tm.tmHeight;
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buf[0] = 0;
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sprintf(buf, m_demo_processing ? "blur frame" : "copy frame");
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::TextOut(hDC, 0, y, buf, (int)strlen(buf));
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y += tm.tmHeight;
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buf[0] = 0;
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sprintf(buf, "time: %4.1f msec", time);
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::TextOut(hDC, 0, y, buf, (int)strlen(buf));
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y += tm.tmHeight;
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buf[0] = 0;
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sprintf(buf, "OpenCL device: %s", oclDevName.c_str());
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::TextOut(hDC, 0, y, buf, (int)strlen(buf));
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::SelectObject(hDC, hOldFont);
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}
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r = pSurface->ReleaseDC(hDC);
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return;
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} // print_info()
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int cleanup(void)
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{
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SAFE_RELEASE(m_pSurface);
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SAFE_RELEASE(m_pBackBuffer);
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SAFE_RELEASE(m_pD3D9DevEx);
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SAFE_RELEASE(m_pD3D9Ex);
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D3DSample::cleanup();
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return EXIT_SUCCESS;
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} // cleanup()
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private:
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LPDIRECT3D9EX m_pD3D9Ex;
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LPDIRECT3DDEVICE9EX m_pD3D9DevEx;
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LPDIRECT3DSURFACE9 m_pBackBuffer;
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LPDIRECT3DSURFACE9 m_pSurface;
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cv::ocl::Context m_oclCtx;
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cv::String m_oclPlatformName;
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cv::String m_oclDevName;
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};
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// main func
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int main(int argc, char** argv)
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{
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std::string title = "D3D9Ex interop sample";
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return d3d_app<D3D9ExWinApp>(argc, argv, title);
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}
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