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https://github.com/gnif/LookingGlass.git
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[host] dxgi: re-send the last frame if capture times out
This change prevents the guest from stalling on startup if there are no frames being captured
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parent
758b7af754
commit
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@ -31,6 +31,7 @@ DXGI::DXGI() :
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m_deviceContext(),
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m_dup(),
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m_texture(),
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m_surface(),
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m_pointer(NULL)
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{
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}
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@ -190,6 +191,15 @@ void DXGI::DeInitialize()
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m_pointerBufSize = 0;
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}
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if (m_surfaceMapped)
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{
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m_surface->Unmap();
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m_surfaceMapped = false;
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}
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if (m_surface)
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m_surface.Release();
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if (m_texture)
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m_texture.Release();
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@ -241,7 +251,22 @@ GrabStatus DXGI::GrabFrame(FrameInfo & frame)
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{
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while(true)
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{
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status = m_dup->AcquireNextFrame(INFINITE, &frameInfo, &res);
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status = m_dup->AcquireNextFrame(1000, &frameInfo, &res);
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if (status == DXGI_ERROR_WAIT_TIMEOUT)
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{
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if (!m_surfaceMapped)
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break;
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// send the last frame again if we timeout to prevent the client stalling on restart
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frame.width = m_desc.Width;
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frame.height = m_desc.Height;
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frame.stride = m_rect.Pitch / 4;
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unsigned int size = m_height * m_rect.Pitch;
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memcpySSE(frame.buffer, m_rect.pBits, size < frame.bufferSize ? size : frame.bufferSize);
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return GRAB_STATUS_OK;
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}
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if (!SUCCEEDED(status))
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break;
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@ -371,8 +396,7 @@ GrabStatus DXGI::GrabFrame(FrameInfo & frame)
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return GRAB_STATUS_ERROR;
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}
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D3D11_TEXTURE2D_DESC desc;
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src->GetDesc(&desc);
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src->GetDesc(&m_desc);
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m_deviceContext->CopyResource(m_texture, src);
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@ -380,38 +404,42 @@ GrabStatus DXGI::GrabFrame(FrameInfo & frame)
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res.Release();
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src.Release();
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IDXGISurface1Ptr surface(m_texture);
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if (!surface)
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if (m_surfaceMapped)
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{
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status = m_surface->Unmap();
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if (FAILED(status))
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{
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DEBUG_ERROR("Failed to unmap surface: %08x", (int)status);
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return GRAB_STATUS_ERROR;
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}
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m_surfaceMapped = false;
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m_surface.Release();
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}
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m_surface = m_texture;
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if (!m_surface)
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{
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DEBUG_ERROR("Failed to get IDXGISurface1");
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return GRAB_STATUS_ERROR;
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}
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DXGI_MAPPED_RECT rect;
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status = surface->Map(&rect, DXGI_MAP_READ);
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status = m_surface->Map(&m_rect, DXGI_MAP_READ);
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if (FAILED(status))
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{
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DEBUG_ERROR("Failed to map surface: %08x", (int)status);
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return GRAB_STATUS_ERROR;
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}
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m_surfaceMapped = true;
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m_width = desc.Width;
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m_height = desc.Height;
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m_width = m_desc.Width;
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m_height = m_desc.Height;
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frame.width = desc.Width;
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frame.height = desc.Height;
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frame.stride = rect.Pitch / 4;
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frame.width = m_desc.Width;
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frame.height = m_desc.Height;
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frame.stride = m_rect.Pitch / 4;
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unsigned int size = m_height * rect.Pitch;
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memcpySSE(frame.buffer, rect.pBits, size < frame.bufferSize ? size : frame.bufferSize);
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status = surface->Unmap();
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if (FAILED(status))
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{
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DEBUG_ERROR("Failed to unmap surface: %08x", (int)status);
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return GRAB_STATUS_ERROR;
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}
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unsigned int size = m_height * m_rect.Pitch;
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memcpySSE(frame.buffer, m_rect.pBits, size < frame.bufferSize ? size : frame.bufferSize);
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return GRAB_STATUS_OK;
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}
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@ -80,6 +80,10 @@ namespace Capture
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IDXGIOutput1Ptr m_output;
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IDXGIOutputDuplicationPtr m_dup;
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ID3D11Texture2DPtr m_texture;
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IDXGISurface1Ptr m_surface;
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D3D11_TEXTURE2D_DESC m_desc;
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DXGI_MAPPED_RECT m_rect;
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bool m_surfaceMapped;
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BYTE * m_pointer;
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UINT m_pointerBufSize;
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UINT m_pointerSize;
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