How to get IDXGISurface data from IDXGISwapChain1 - windows

Question

I use dxgi to capture window, since the windows maybe resized, so I use IDXGISwapChain1 and recreate framepool, but now I can't get the surface since GetRestrictToOutput always return null.
void OnFrameArrived(winrt::Windows::Graphics::Capture::Direct3D11CaptureFramePool const &sender,winrt::Windows::Foundation::IInspectable const &)
{
const winrt::Windows::Graphics::Capture::Direct3D11CaptureFrame frame = sender.TryGetNextFrame();
auto swapChainResizedToFrame = TryResizeSwapChain(frame);
winrt::com_ptr<ID3D11Texture2D> backBuffer;
winrt::check_hresult(m_swapChain->GetBuffer(0, winrt::guid_of<ID3D11Texture2D>(), backBuffer.put_void()));
winrt::com_ptr<ID3D11Texture2D> frameSurface = GetDXGIInterfaceFromObject<ID3D11Texture2D>(frame.Surface());
m_d3dContext->CopyResource(backBuffer.get(), frameSurface.get());
DXGI_PRESENT_PARAMETERS presentParameters{};
m_swapChain->Present1(1, 0, &presentParameters);
//winrt::com_ptr<IDXGIOutput> dxgiOutput = nullptr;
IDXGIOutput* dxgiOutput = nullptr;
BOOL full;
m_swapChain->GetRestrictToOutput(&dxgiOutput);
if(dxgiOutput!=nullptr){
std::cerr <<"33333333333333"<<std::endl;
...
}
m_framePool.Recreate(m_device, m_pixelFormat, 2, m_lastSize);
If I use getbuffer to get the image data, if the window size is changed, then the image is black, the code is as below:
winrt::com_ptr<ID3D11Texture2D> renderBuffer;
winrt::check_hresult(m_swapChain->GetBuffer(0, winrt::guid_of<ID3D11Texture2D>(), renderBuffer.put_void()));
if(renderBuffer != nullptr){
D3D11_TEXTURE2D_DESC desc;
renderBuffer->GetDesc(&desc);
desc.Usage = D3D11_USAGE_STAGING;
desc.BindFlags = 0;
desc.CPUAccessFlags = D3D11_CPU_ACCESS_READ;
desc.MiscFlags = 0;
desc.MipLevels = 1;
desc.ArraySize = 1;
desc.SampleDesc.Count = 1;
winrt::com_ptr<ID3D11Texture2D> textureCopy;
auto d3dDevice = GetDXGIInterfaceFromObject<ID3D11Device>(m_device);
winrt::check_hresult(d3dDevice->CreateTexture2D(&desc, nullptr, textureCopy.put()));
m_d3dContext->CopyResource(textureCopy.get(), renderBuffer.get());
winrt::com_ptr<IDXGISurface> dxgi_surface = nullptr;
HRESULT hr = textureCopy->QueryInterface(__uuidof(IDXGISurface), (void **)(&dxgi_surface));
DXGI_MAPPED_RECT mapped_rect;
hr = dxgi_surface->Map(&mapped_rect, DXGI_MAP_READ);
unsigned int imgSize = desc.Width * desc.Height * 4;
uint8_t* buffer = new uint8_t[imgSize];
int dst_rowpitch = desc.Width * 4;
for (unsigned int h = 0; h < desc.Height; h++) {
memcpy_s(buffer + h * dst_rowpitch, dst_rowpitch, (BYTE*)mapped_rect.pBits + h * mapped_rect.Pitch, min(mapped_rect.Pitch, dst_rowpitch));
}
dxgi_surface->Unmap();