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[idd] transport: abstract LGMP implementation

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Introduce transport, frame, and control interfaces with an LGMP factory
backend.

Move LGMP and IVSHMEM implementation details under transport/lgmp and
expose direct frame-buffer memory through a neutral capability.
This commit is contained in:
Geoffrey McRae
2026-08-07 16:39:07 +10:00
parent 30a1383d5e
commit 6725133375
46 changed files with 1026 additions and 480 deletions
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37
idd/LGIdd/capture/CFrameBufferResource.cpp
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@@ -21,21 +21,19 @@
#include "capture/CFrameBufferResource.h"
#include "capture/CFrameProcessorUtil.h"
#include "d3d/CD3D12Device.h"
#include "transport/CFrameTransport.h"
#include "transport/CIVSHMEM.h"
#include "CDebug.h"
#include <cstring>
bool CFrameBufferResource::Init(CFrameTransport * transport,
CD3D12Device * dx12, unsigned frameIndex, uint8_t * base, size_t size,
const D3D12_RESOURCE_DESC * textureDesc)
bool CFrameBufferResource::Init(CD3D12Device * dx12,
unsigned frameIndex, uint8_t * base, uint64_t heapOffset, size_t size,
size_t maxFrameSize, const D3D12_RESOURCE_DESC * textureDesc)
{
m_frameIndex = frameIndex;
if (size > transport->GetMaxFrameSize())
if (size > maxFrameSize)
{
DEBUG_ERROR("Frame size of %llu is too large to fit in shared ram",
DEBUG_ERROR("Frame size of %llu is too large for transport memory",
(unsigned long long)size);
return false;
}
@@ -47,7 +45,7 @@ bool CFrameBufferResource::Init(CFrameTransport * transport,
D3D12_RESOURCE_DESC desc = {};
if (textureDesc)
{
if (indirect || !dx12->CanUseIVSHMEMTexture())
if (indirect || !dx12->CanUseDirectTexture())
return false;
desc = *textureDesc;
if (desc.Dimension != D3D12_RESOURCE_DIMENSION_TEXTURE2D ||
@@ -130,20 +128,19 @@ bool CFrameBufferResource::Init(CFrameTransport * transport,
}
else
{
const UINT64 heapOffset =
(uintptr_t)base -
(uintptr_t)transport->GetIVSHMEM().GetMem();
const D3D12_RESOURCE_ALLOCATION_INFO allocation =
dx12->GetDevice()->GetResourceAllocationInfo(0, 1, &desc);
allocationSize = allocation.SizeInBytes;
const D3D12_HEAP_DESC heapDesc = dx12->GetHeap()->GetDesc();
const D3D12_HEAP_DESC heapDesc =
dx12->GetTransportHeap()->GetDesc();
if (!allocation.Alignment ||
heapOffset % allocation.Alignment ||
allocation.SizeInBytes > transport->GetMaxFrameSize() ||
allocation.SizeInBytes > maxFrameSize ||
heapOffset > heapDesc.SizeInBytes ||
allocation.SizeInBytes > heapDesc.SizeInBytes - heapOffset)
{
DEBUG_ERROR("IVSHMEM resource does not fit its framebuffer allocation");
DEBUG_ERROR(
"Transport resource does not fit its framebuffer allocation");
return false;
}
@@ -156,20 +153,20 @@ bool CFrameBufferResource::Init(CFrameTransport * transport,
if (FAILED(hr) ||
!(support.Support1 & D3D12_FORMAT_SUPPORT1_TEXTURE2D))
{
DEBUG_ERROR("IVSHMEM texture format is unsupported");
DEBUG_ERROR("Transport texture format is unsupported");
return false;
}
DEBUG_TRACE("Creating IVSHMEM texture for %p", base);
resName = L"IVSHMEM Texture";
DEBUG_TRACE("Creating transport texture for %p", base);
resName = L"Transport Texture";
}
else
{
DEBUG_TRACE("Creating IVSHMEM buffer for %p", base);
resName = L"IVSHMEM";
DEBUG_TRACE("Creating transport buffer for %p", base);
resName = L"Transport Buffer";
}
hr = dx12->GetDevice()->CreatePlacedResource(
dx12->GetHeap().Get(),
dx12->GetTransportHeap().Get(),
heapOffset,
&desc,
D3D12_RESOURCE_STATE_COMMON,