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Optimize blending in DXVA2 and D3D11VA renderers

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This commit is contained in:
Cameron Gutman
2025-12-28 13:53:13 -06:00
parent c5b7a9c679
commit c3ce0918b3
3 changed files with 32 additions and 6 deletions
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31
app/streaming/video/ffmpeg-renderers/d3d11va.cpp
View File

@@ -105,6 +105,9 @@ D3D11VARenderer::~D3D11VARenderer()
m_OverlayPixelShader.Reset();
m_OverlayBlendState.Reset();
m_VideoBlendState.Reset();
m_RenderTargetView.Reset();
m_SwapChain.Reset();
@@ -690,8 +693,10 @@ void D3D11VARenderer::renderOverlay(Overlay::OverlayType type)
m_DeviceContext->PSSetShader(m_OverlayPixelShader.Get(), nullptr, 0);
m_DeviceContext->PSSetShaderResources(0, 1, overlayTextureResourceView.GetAddressOf());
// Draw the overlay
// Draw the overlay with alpha blending
m_DeviceContext->OMSetBlendState(m_OverlayBlendState.Get(), nullptr, 0xffffffff);
m_DeviceContext->DrawIndexed(6, 0, 0);
m_DeviceContext->OMSetBlendState(m_VideoBlendState.Get(), nullptr, 0xffffffff);
}
void D3D11VARenderer::bindColorConversion(AVFrame* frame)
@@ -1379,7 +1384,7 @@ bool D3D11VARenderer::setupRenderingResources()
}
}
// Create our blend state
// Create our overlay blend state
{
D3D11_BLEND_DESC blendDesc = {};
blendDesc.AlphaToCoverageEnable = FALSE;
@@ -1393,10 +1398,26 @@ bool D3D11VARenderer::setupRenderingResources()
blendDesc.RenderTarget[0].BlendOpAlpha = D3D11_BLEND_OP_ADD;
blendDesc.RenderTarget[0].RenderTargetWriteMask = D3D11_COLOR_WRITE_ENABLE_ALL;
ComPtr<ID3D11BlendState> blendState;
hr = m_Device->CreateBlendState(&blendDesc, &blendState);
hr = m_Device->CreateBlendState(&blendDesc, &m_OverlayBlendState);
if (FAILED(hr)) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"ID3D11Device::CreateBlendState() failed: %x",
hr);
return false;
}
}
// Create and bind our video blend state
{
D3D11_BLEND_DESC blendDesc = {};
blendDesc.AlphaToCoverageEnable = FALSE;
blendDesc.IndependentBlendEnable = FALSE;
blendDesc.RenderTarget[0].BlendEnable = FALSE;
blendDesc.RenderTarget[0].RenderTargetWriteMask = D3D11_COLOR_WRITE_ENABLE_ALL;
hr = m_Device->CreateBlendState(&blendDesc, &m_VideoBlendState);
if (SUCCEEDED(hr)) {
m_DeviceContext->OMSetBlendState(blendState.Get(), nullptr, 0xffffffff);
m_DeviceContext->OMSetBlendState(m_VideoBlendState.Get(), nullptr, 0xffffffff);
}
else {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,

3
app/streaming/video/ffmpeg-renderers/d3d11va.h
View File

@@ -61,6 +61,9 @@ private:
Microsoft::WRL::ComPtr<IDXGISwapChain4> m_SwapChain;
Microsoft::WRL::ComPtr<ID3D11DeviceContext1> m_DeviceContext;
Microsoft::WRL::ComPtr<ID3D11RenderTargetView> m_RenderTargetView;
Microsoft::WRL::ComPtr<ID3D11BlendState> m_VideoBlendState;
Microsoft::WRL::ComPtr<ID3D11BlendState> m_OverlayBlendState;
SupportedFenceType m_FenceType;
SDL_mutex* m_ContextLock;
bool m_BindDecoderOutputTextures;

4
app/streaming/video/ffmpeg-renderers/dxva2.cpp
View File

@@ -375,7 +375,6 @@ bool DXVA2Renderer::initializeRenderer()
m_Device->SetSamplerState(0, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR);
m_Device->SetSamplerState(0, D3DSAMP_MINFILTER, D3DTEXF_LINEAR);
m_Device->SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE);
m_Device->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_SRCALPHA);
m_Device->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA);
@@ -951,7 +950,10 @@ void DXVA2Renderer::renderOverlay(Overlay::OverlayType type)
return;
}
// Only enable blending when drawing the overlay
m_Device->SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE);
hr = m_Device->DrawPrimitive(D3DPT_TRIANGLEFAN, 0, 2);
m_Device->SetRenderState(D3DRS_ALPHABLENDENABLE, FALSE);
if (FAILED(hr)) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"DrawPrimitive() failed: %x",