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Clamp chroma texcoords to avoid sampling alignment padding

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This resolves #885 without the massive perf hit on lower end Intel GPUs.
This commit is contained in:
Cameron Gutman
2024-06-22 16:19:26 -05:00
parent c3bd7edc4e
commit 94943d2865
7 changed files with 43 additions and 4 deletions
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app/streaming/video/ffmpeg-renderers/d3d11va.cpp
+34 -1
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@@ -728,7 +728,7 @@ void D3D11VARenderer::bindColorConversion(AVFrame* frame)
ID3D11Buffer* constantBuffer;
HRESULT hr = m_Device->CreateBuffer(&constDesc, &constData, &constantBuffer);
if (SUCCEEDED(hr)) {
m_DeviceContext->PSSetConstantBuffers(0, 1, &constantBuffer);
m_DeviceContext->PSSetConstantBuffers(1, 1, &constantBuffer);
constantBuffer->Release();
}
else {
@@ -1313,6 +1313,39 @@ bool D3D11VARenderer::setupRenderingResources()
}
}
// Create our fixed constant buffer to limit chroma texcoords and avoid sampling from alignment texels.
{
D3D11_BUFFER_DESC constDesc = {};
constDesc.ByteWidth = sizeof(CSC_CONST_BUF);
constDesc.Usage = D3D11_USAGE_IMMUTABLE;
constDesc.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
constDesc.CPUAccessFlags = 0;
constDesc.MiscFlags = 0;
int alignedWidth = FFALIGN(m_DecoderParams.width, m_TextureAlignment);
int alignedHeight = FFALIGN(m_DecoderParams.height, m_TextureAlignment);
float chromaUVMax[3] = {};
chromaUVMax[0] = m_DecoderParams.width != alignedWidth ? ((float)(m_DecoderParams.width - 1) / alignedWidth) : 1.0f;
chromaUVMax[1] = m_DecoderParams.height != alignedHeight ? ((float)(m_DecoderParams.height - 1) / alignedHeight) : 1.0f;
D3D11_SUBRESOURCE_DATA constData = {};
constData.pSysMem = chromaUVMax;
ID3D11Buffer* constantBuffer;
HRESULT hr = m_Device->CreateBuffer(&constDesc, &constData, &constantBuffer);
if (SUCCEEDED(hr)) {
m_DeviceContext->PSSetConstantBuffers(0, 1, &constantBuffer);
constantBuffer->Release();
}
else {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"ID3D11Device::CreateBuffer() failed: %x",
hr);
return false;
}
}
// Create our blend state
{
D3D11_BLEND_DESC blendDesc = {};