libobs-winrt: Add module for WinRT functionality
Currently wraps Windows Graphics Capture API.master
jpark37
jp9000
parent
ab53f31eb5
commit
d6d27cfab1
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@ -191,6 +191,7 @@ if(NOT INSTALLER_RUN)
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if(WIN32)
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add_subdirectory(libobs-d3d11)
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add_subdirectory(libobs-winrt)
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endif()
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add_subdirectory(libobs-opengl)
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@ -0,0 +1,26 @@
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project(libobs-winrt)
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include_directories(SYSTEM "${CMAKE_SOURCE_DIR}/libobs")
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add_definitions(-DLIBOBS_EXPORTS)
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include_directories(${CMAKE_CURRENT_BINARY_DIR})
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set(libobs-winrt_SOURCES
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winrt-capture.cpp)
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set(libobs-winrt_HEADERS
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winrt-capture.h)
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add_library(libobs-winrt MODULE
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${libobs-winrt_SOURCES}
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${libobs-winrt_HEADERS})
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set_target_properties(libobs-winrt
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PROPERTIES
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OUTPUT_NAME libobs-winrt
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PREFIX "")
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target_link_libraries(libobs-winrt
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libobs
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windowsapp)
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install_obs_core(libobs-winrt)
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@ -0,0 +1,337 @@
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#include "winrt-capture.h"
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#include "../libobs/util/windows/ComPtr.hpp"
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#include <d3d11.h>
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#include <Windows.Graphics.Capture.Interop.h>
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#include <winrt/Windows.Foundation.Metadata.h>
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#include <winrt/Windows.Graphics.Capture.h>
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extern "C" {
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HRESULT __stdcall CreateDirect3D11DeviceFromDXGIDevice(
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::IDXGIDevice *dxgiDevice, ::IInspectable **graphicsDevice);
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HRESULT __stdcall CreateDirect3D11SurfaceFromDXGISurface(
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::IDXGISurface *dgxiSurface, ::IInspectable **graphicsSurface);
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}
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struct __declspec(uuid("A9B3D012-3DF2-4EE3-B8D1-8695F457D3C1"))
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IDirect3DDxgiInterfaceAccess : ::IUnknown {
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virtual HRESULT __stdcall GetInterface(GUID const &id,
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void **object) = 0;
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};
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extern "C" EXPORT bool winrt_capture_supported()
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{
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/* no contract for IGraphicsCaptureItemInterop, verify 10.0.18362.0 */
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return winrt::Windows::Foundation::Metadata::ApiInformation::
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IsApiContractPresent(L"Windows.Foundation.UniversalApiContract",
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8);
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}
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template<typename T>
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static winrt::com_ptr<T> GetDXGIInterfaceFromObject(
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winrt::Windows::Foundation::IInspectable const &object)
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{
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auto access = object.as<IDirect3DDxgiInterfaceAccess>();
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winrt::com_ptr<T> result;
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winrt::check_hresult(
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access->GetInterface(winrt::guid_of<T>(), result.put_void()));
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return result;
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}
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struct winrt_capture {
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bool capture_cursor;
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gs_texture_t *texture;
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bool texture_written;
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winrt::Windows::Graphics::Capture::GraphicsCaptureItem item{nullptr};
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winrt::Windows::Graphics::DirectX::Direct3D11::IDirect3DDevice device{
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nullptr};
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ComPtr<ID3D11DeviceContext> context;
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winrt::Windows::Graphics::Capture::Direct3D11CaptureFramePool frame_pool{
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nullptr};
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winrt::Windows::Graphics::Capture::GraphicsCaptureSession session{
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nullptr};
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winrt::Windows::Graphics::SizeInt32 last_size;
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winrt::Windows::Graphics::Capture::Direct3D11CaptureFramePool::
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FrameArrived_revoker frame_arrived;
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bool thread_changed;
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struct winrt_capture *next;
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void on_frame_arrived(winrt::Windows::Graphics::Capture::
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Direct3D11CaptureFramePool const &sender,
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winrt::Windows::Foundation::IInspectable const &)
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{
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obs_enter_graphics();
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const winrt::Windows::Graphics::Capture::Direct3D11CaptureFrame
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frame = sender.TryGetNextFrame();
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const winrt::Windows::Graphics::SizeInt32 frame_content_size =
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frame.ContentSize();
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winrt::com_ptr<ID3D11Texture2D> frame_surface =
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GetDXGIInterfaceFromObject<ID3D11Texture2D>(
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frame.Surface());
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/* need GetDesc because ContentSize is not reliable */
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D3D11_TEXTURE2D_DESC desc;
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frame_surface->GetDesc(&desc);
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if (texture) {
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if (desc.Width != gs_texture_get_width(texture) ||
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desc.Height != gs_texture_get_height(texture)) {
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gs_texture_destroy(texture);
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texture = nullptr;
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}
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}
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if (!texture) {
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texture = gs_texture_create(desc.Width, desc.Height,
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GS_BGRA, 1, nullptr, 0);
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}
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/* if they gave an SRV, we could avoid this copy */
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context->CopyResource(
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(ID3D11Texture2D *)gs_texture_get_obj(texture),
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frame_surface.get());
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texture_written = true;
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if (frame_content_size.Width != last_size.Width ||
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frame_content_size.Height != last_size.Height) {
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frame_pool.Recreate(
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device,
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winrt::Windows::Graphics::DirectX::
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DirectXPixelFormat::B8G8R8A8UIntNormalized,
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2, frame_content_size);
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last_size = frame_content_size;
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}
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obs_leave_graphics();
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}
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};
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struct winrt_capture *capture_list;
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static void winrt_capture_device_loss_release(void *data)
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{
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winrt_capture *capture = static_cast<winrt_capture *>(data);
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capture->frame_arrived.revoke();
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capture->frame_pool.Close();
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capture->session.Close();
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capture->session = nullptr;
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capture->frame_pool = nullptr;
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capture->context = nullptr;
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capture->device = nullptr;
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}
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static void winrt_capture_device_loss_rebuild(void *device_void, void *data)
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{
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winrt_capture *capture = static_cast<winrt_capture *>(data);
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ID3D11Device *const d3d_device = (ID3D11Device *)device_void;
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ComPtr<IDXGIDevice> dxgi_device;
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if (FAILED(d3d_device->QueryInterface(&dxgi_device)))
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blog(LOG_ERROR, "Failed to get DXGI device");
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winrt::com_ptr<IInspectable> inspectable;
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if (FAILED(CreateDirect3D11DeviceFromDXGIDevice(dxgi_device.Get(),
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inspectable.put())))
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blog(LOG_ERROR, "Failed to get WinRT device");
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const winrt::Windows::Graphics::DirectX::Direct3D11::IDirect3DDevice
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device = inspectable.as<winrt::Windows::Graphics::DirectX::
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Direct3D11::IDirect3DDevice>();
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const winrt::Windows::Graphics::Capture::Direct3D11CaptureFramePool
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frame_pool = winrt::Windows::Graphics::Capture::
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Direct3D11CaptureFramePool::Create(
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device,
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winrt::Windows::Graphics::DirectX::
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DirectXPixelFormat::B8G8R8A8UIntNormalized,
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2, capture->last_size);
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const winrt::Windows::Graphics::Capture::GraphicsCaptureSession session =
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frame_pool.CreateCaptureSession(capture->item);
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capture->device = device;
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d3d_device->GetImmediateContext(&capture->context);
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capture->frame_pool = frame_pool;
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capture->session = session;
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capture->frame_arrived = frame_pool.FrameArrived(
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winrt::auto_revoke,
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{capture, &winrt_capture::on_frame_arrived});
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session.StartCapture();
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}
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thread_local bool initialized_tls;
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extern "C" EXPORT struct winrt_capture *winrt_capture_init(bool cursor,
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HWND window)
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{
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ID3D11Device *const d3d_device = (ID3D11Device *)gs_get_device_obj();
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ComPtr<IDXGIDevice> dxgi_device;
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if (FAILED(d3d_device->QueryInterface(&dxgi_device))) {
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blog(LOG_WARNING, "[winrt_capture_init] Failed to "
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"get DXGI device");
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return nullptr;
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}
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winrt::com_ptr<IInspectable> inspectable;
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HRESULT hr = CreateDirect3D11DeviceFromDXGIDevice(dxgi_device.Get(),
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inspectable.put());
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if (FAILED(hr)) {
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blog(LOG_WARNING, "[winrt_capture_init] Failed to "
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"get WinRT device");
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return nullptr;
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}
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auto activation_factory = winrt::get_activation_factory<
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winrt::Windows::Graphics::Capture::GraphicsCaptureItem>();
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auto interop_factory =
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activation_factory.as<IGraphicsCaptureItemInterop>();
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winrt::Windows::Graphics::Capture::GraphicsCaptureItem item = {nullptr};
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try {
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interop_factory->CreateForWindow(
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window,
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winrt::guid_of<ABI::Windows::Graphics::Capture::
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IGraphicsCaptureItem>(),
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reinterpret_cast<void **>(winrt::put_abi(item)));
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} catch (winrt::hresult_invalid_argument &) {
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blog(LOG_WARNING, "[winrt_capture_init] Failed to "
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"create GraphicsCaptureItem");
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return nullptr;
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}
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const winrt::Windows::Graphics::DirectX::Direct3D11::IDirect3DDevice
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device = inspectable.as<winrt::Windows::Graphics::DirectX::
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Direct3D11::IDirect3DDevice>();
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const winrt::Windows::Graphics::SizeInt32 size = item.Size();
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const winrt::Windows::Graphics::Capture::Direct3D11CaptureFramePool
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frame_pool = winrt::Windows::Graphics::Capture::
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Direct3D11CaptureFramePool::Create(
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device,
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winrt::Windows::Graphics::DirectX::
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DirectXPixelFormat::B8G8R8A8UIntNormalized,
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2, size);
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const winrt::Windows::Graphics::Capture::GraphicsCaptureSession session =
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frame_pool.CreateCaptureSession(item);
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if (capture_list == nullptr)
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initialized_tls = true;
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struct winrt_capture *capture = new winrt_capture{};
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capture->capture_cursor = cursor;
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capture->item = item;
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capture->device = device;
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d3d_device->GetImmediateContext(&capture->context);
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capture->frame_pool = frame_pool;
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capture->session = session;
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capture->last_size = size;
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capture->frame_arrived = frame_pool.FrameArrived(
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winrt::auto_revoke,
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{capture, &winrt_capture::on_frame_arrived});
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capture->next = capture_list;
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capture_list = capture;
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session.StartCapture();
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gs_device_loss callbacks;
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callbacks.device_loss_release = winrt_capture_device_loss_release;
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callbacks.device_loss_rebuild = winrt_capture_device_loss_rebuild;
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callbacks.data = capture;
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gs_register_loss_callbacks(&callbacks);
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return capture;
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}
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extern "C" EXPORT void winrt_capture_free(struct winrt_capture *capture)
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{
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if (capture) {
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struct winrt_capture *current = capture_list;
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if (current == capture) {
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capture_list = capture->next;
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} else {
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struct winrt_capture *previous;
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do {
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previous = current;
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current = current->next;
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} while (current != capture);
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previous->next = current->next;
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}
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obs_enter_graphics();
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gs_unregister_loss_callbacks(capture);
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gs_texture_destroy(capture->texture);
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obs_leave_graphics();
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capture->frame_arrived.revoke();
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capture->frame_pool.Close();
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capture->session.Close();
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delete capture;
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}
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}
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static void draw_texture(struct winrt_capture *capture, gs_effect_t *effect)
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{
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gs_texture_t *const texture = capture->texture;
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gs_technique_t *tech = gs_effect_get_technique(effect, "Draw");
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gs_eparam_t *image = gs_effect_get_param_by_name(effect, "image");
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size_t passes;
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gs_effect_set_texture(image, texture);
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passes = gs_technique_begin(tech);
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for (size_t i = 0; i < passes; i++) {
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if (gs_technique_begin_pass(tech, i)) {
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gs_draw_sprite(texture, 0, 0, 0);
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gs_technique_end_pass(tech);
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}
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}
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gs_technique_end(tech);
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}
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extern "C" EXPORT void winrt_capture_render(struct winrt_capture *capture,
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gs_effect_t *effect)
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{
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if (capture && capture->texture_written) {
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if (!initialized_tls) {
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struct winrt_capture *current = capture_list;
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while (current) {
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current->thread_changed = true;
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current = current->next;
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}
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initialized_tls = true;
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}
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if (capture->thread_changed) {
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/* new graphics thread. treat like device loss. */
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winrt_capture_device_loss_release(capture);
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winrt_capture_device_loss_rebuild(gs_get_device_obj(),
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capture);
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capture->thread_changed = false;
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}
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draw_texture(capture, effect);
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}
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}
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extern "C" EXPORT int32_t
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winrt_capture_width(const struct winrt_capture *capture)
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{
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return capture ? capture->last_size.Width : 0;
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}
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extern "C" EXPORT int32_t
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winrt_capture_height(const struct winrt_capture *capture)
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{
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return capture ? capture->last_size.Height : 0;
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}
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@ -0,0 +1,23 @@
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#pragma once
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include <obs-module.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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EXPORT bool winrt_capture_supported();
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EXPORT struct winrt_capture *winrt_capture_init(bool cursor, HWND window);
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EXPORT void winrt_capture_free(struct winrt_capture *capture);
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EXPORT void winrt_capture_render(struct winrt_capture *capture,
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gs_effect_t *effect);
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EXPORT int32_t winrt_capture_width(const struct winrt_capture *capture);
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EXPORT int32_t winrt_capture_height(const struct winrt_capture *capture);
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#ifdef __cplusplus
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}
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#endif
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