public CaptureEncode(IDirect3DDevice device, GraphicsCaptureItem item)
{
_device = device; _lastSize = item.Size;
_d3dDevice = Direct3D11Helpers.CreateSharpDXDevice(device);
_captureItem = item;
_isRecording = false;
//_multithread = _d3dDevice.QueryInterface<SharpDX.Direct3D11.Multithread>();
//_multithread.SetMultithreadProtected(true);
//_frameEvent = new ManualResetEvent(false);
//_closedEvent = new ManualResetEvent(false);
//_events = new[] { _closedEvent, _frameEvent };
CreateMediaObjects();
}
private SurfaceWithInfo WaitForNewFrame()
{
_currentFrame?.Dispose();
_frameEvent.Reset();//获取新帧
var whiteRegion = new SharpDX.Direct3D11.ResourceRegion(0, 0, 0, 1920, 1080, 1);
var signaledEvent = _events[WaitHandle.WaitAny(_events)];
if (signaledEvent == _closedEvent)
{
Cleanup();
return(null);
}
var result = new SurfaceWithInfo {
SystemRelativeTime = _currentFrame.SystemRelativeTime
};
using (var multithreadLock = new MultithreadLock(_multithread))
using (var sourceTexture = Direct3D11Helpers.CreateSharpDXTexture2D(_currentFrame.Surface))
{
_d3dDevice.ImmediateContext.ClearRenderTargetView(_composeRenderTargetView, new SharpDX.Mathematics.Interop.RawColor4(0, 0, 0, 1));
var region = new SharpDX.Direct3D11.ResourceRegion(LocationX > 0?LocationX:0, LocationY > 0?LocationY:0, 0,
(LocationX + 1920 > sourceTexture.Description.Width ? sourceTexture.Description.Width : LocationX + 1920),
(LocationY + 1080 > sourceTexture.Description.Height ? sourceTexture.Description.Height : LocationY + 1080), 1);
_d3dDevice.ImmediateContext.CopySubresourceRegion(sourceTexture, 0, whiteRegion, _blankComposeTexture, 0); //覆盖掉原本区域
_d3dDevice.ImmediateContext.CopySubresourceRegion(sourceTexture, 0, region, _tarComposeTexture, LocationX >= 0?0:(1920 + LocationX > 0? 1920 + LocationX - 1:0),
LocationY >= 0?0:(1080 + LocationY - 1 > 0? 1080 + LocationY - 1:0), 0); //_targetTexture为剪切后的区域
//https://stackoverflow.com/questions/64130136/texture2d-from-byte-array-sharpdx
//实现空白区域
var description = _tarComposeTexture.Description;
description.Usage = SharpDX.Direct3D11.ResourceUsage.Default;
description.BindFlags = SharpDX.Direct3D11.BindFlags.ShaderResource | SharpDX.Direct3D11.BindFlags.RenderTarget;
description.CpuAccessFlags = SharpDX.Direct3D11.CpuAccessFlags.None;
description.OptionFlags = SharpDX.Direct3D11.ResourceOptionFlags.None;
using (var copyTexture = new SharpDX.Direct3D11.Texture2D(_d3dDevice, description))
{
_d3dDevice.ImmediateContext.CopyResource(_tarComposeTexture, copyTexture);
result.Surface = Direct3D11Helpers.CreateDirect3DSurfaceFromSharpDXTexture(copyTexture);
}
}
return(result);
}
private void OnFrameArrived(Direct3D11CaptureFramePool sender, object args)
{
var newSize = false;
using (var frame = sender.TryGetNextFrame())
{
if (frame.ContentSize.Width != _lastSize.Width ||
frame.ContentSize.Height != _lastSize.Height)
{
// 源已改变,故需要变换抓取大小,首先改变swap chain,之后是Texture
newSize = true;
_lastSize = frame.ContentSize;
_swapChain.ResizeBuffers(
2,
_lastSize.Width,
_lastSize.Height,
SharpDX.DXGI.Format.B8G8R8A8_UNorm,
SharpDX.DXGI.SwapChainFlags.None);
}
using (var sourceTexture = Direct3D11Helpers.CreateSharpDXTexture2D(frame.Surface))
using (var backBuffer = _swapChain.GetBackBuffer <SharpDX.Direct3D11.Texture2D>(0))
using (var renderTargetView = new SharpDX.Direct3D11.RenderTargetView(_d3dDevice, backBuffer))
{
_d3dDevice.ImmediateContext.ClearRenderTargetView(renderTargetView, new SharpDX.Mathematics.Interop.RawColor4(0, 0, 0, 1));
_d3dDevice.ImmediateContext.CopyResource(sourceTexture, backBuffer);
}
}
_swapChain.Present(1, SharpDX.DXGI.PresentFlags.None);
if (newSize)//帧池重构
{
_framePool.Recreate(
_device,
DirectXPixelFormat.B8G8R8A8UIntNormalized,
2,
_lastSize);
}
}
public CapturePreview(IDirect3DDevice device, GraphicsCaptureItem item)
{
_item = item;
_device = device;
_d3dDevice = Direct3D11Helpers.CreateSharpDXDevice(device);
var dxgiDevice = _d3dDevice.QueryInterface <SharpDX.DXGI.Device>();
var adapter = dxgiDevice.GetParent <SharpDX.DXGI.Adapter>();
var factory = adapter.GetParent <SharpDX.DXGI.Factory2>();
var description = new SharpDX.DXGI.SwapChainDescription1 {
Width = item.Size.Width,
Height = item.Size.Height,
Format = SharpDX.DXGI.Format.B8G8R8A8_UNorm,
Usage = SharpDX.DXGI.Usage.RenderTargetOutput,
SampleDescription = new SharpDX.DXGI.SampleDescription()
{
Count = 1,
Quality = 0
},
BufferCount = 2,
Scaling = SharpDX.DXGI.Scaling.Stretch,
SwapEffect = SharpDX.DXGI.SwapEffect.FlipSequential,
AlphaMode = SharpDX.DXGI.AlphaMode.Premultiplied
};
_swapChain = new SharpDX.DXGI.SwapChain1(factory, dxgiDevice, ref description);
_framePool = Direct3D11CaptureFramePool.CreateFreeThreaded(
_device,
DirectXPixelFormat.B8G8R8A8UIntNormalized,
2,
item.Size);
_session = _framePool.CreateCaptureSession(item);
_lastSize = item.Size;
_framePool.FrameArrived += OnFrameArrived;//新帧到达事件
}