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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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17
idd/LGIdd/capture/CSwapChainProcessor.cpp
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@@ -24,8 +24,8 @@
#include "display/device/CDeviceContext.h"
#include "display/monitor/Context.h"
#include "platform/CPlatformInfo.h"
#include "transport/CFrameTransport.h"
#include "transport/CLGMPControl.h"
#include "transport/IFrameTransport.h"
#include "transport/IControlTransport.h"
#include "util/CSRWLock.h"
#include <avrt.h>
@@ -49,8 +49,8 @@ CSwapChainProcessor::CSwapChainProcessor(CMonitorContext * monitorContext,
m_assignmentGeneration(assignmentGeneration),
m_monitor(monitor),
m_devContext(devContext),
m_transport(devContext->GetFrameTransport()),
m_control(devContext->GetLGMPControl()),
m_transport(devContext->GetTransport().Frames()),
m_control(devContext->GetTransport().Control()),
m_hSwapChain(hSwapChain),
m_renderAdapter(renderAdapter),
m_dx11Device(dx11Device),
@@ -99,7 +99,8 @@ bool CSwapChainProcessor::InitializePipeline()
UINT64 alignSize = CPlatformInfo::GetPageSize();
auto dx12Device = std::make_shared<CD3D12Device>(m_renderAdapter);
const CD3D12Device::InitResult result = dx12Device->Init(
m_transport.GetIVSHMEM(), alignSize, !m_dx11Device->IsSoftware());
m_devContext->GetTransport().GetDirectMemory(), alignSize,
!m_dx11Device->IsSoftware());
if (result == CD3D12Device::RETRY)
{
const HRESULT deviceStatus =
@@ -115,9 +116,9 @@ bool CSwapChainProcessor::InitializePipeline()
if (result == CD3D12Device::FAILURE)
return false;
if (!m_devContext->SetupLGMP(alignSize))
if (!m_devContext->SetupTransport(alignSize))
{
DEBUG_ERROR("SetupLGMP failed");
DEBUG_ERROR("Transport setup failed");
return false;
}
@@ -333,7 +334,7 @@ void CSwapChainProcessor::SwapChainThreadCore()
// Only the buffer2 acquisition path (IddCx 1.10+) reports it; on the legacy
// path HDR is not available, so default to SDR.
DXGI_COLOR_SPACE_TYPE colorSpace = DXGI_COLOR_SPACE_RGB_FULL_G22_NONE_P709;
UINT sdrWhiteLevel = KVMFR_SDR_WHITE_LEVEL_DEFAULT;
UINT sdrWhiteLevel = LG_SDR_WHITE_LEVEL_DEFAULT;
const uint64_t captureStart = CFrameScheduler::Nanotime();
#ifdef HAS_IDDCX_110