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[idd] publish the latest frame before its deadline

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This commit is contained in:
Geoffrey McRae
2026-08-04 13:10:02 +10:00
parent 1176e78a7f
commit 32ced2f24a
5 changed files with 166 additions and 25 deletions
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42
idd/LGIdd/CSwapChainProcessor.cpp
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@@ -31,22 +31,6 @@ static const uint32_t HDR_PQ_MAX_LUMINANCE = 10000;
static_assert(LGMP_Q_FRAME_LEN == 2,
"IDD damage repair assumes two alternating frame buffers");
static uint64_t Nanotime()
{
static const uint64_t frequency = []()
{
LARGE_INTEGER value;
QueryPerformanceFrequency(&value);
return (uint64_t)value.QuadPart;
}();
LARGE_INTEGER counter;
QueryPerformanceCounter(&counter);
const uint64_t ticks = (uint64_t)counter.QuadPart;
return ticks / frequency * 1000000000ULL +
ticks % frequency * 1000000000ULL / frequency;
}
static bool FrameMetadataChanged(const D12FrameFormat& previous,
const D12FrameFormat& current)
{
@@ -258,7 +242,7 @@ bool CSwapChainProcessor::SwapChainThreadCore()
// 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;
const uint64_t captureStart = Nanotime();
const uint64_t captureStart = CFrameScheduler::Nanotime();
#ifdef HAS_IDDCX_110
if (m_devContext->HasIddCx110DDIs())
@@ -374,7 +358,7 @@ void CSwapChainProcessor::CompletionFunction(
// Publish readiness before sampling the endpoint. Timing has its own valid
// flag and is published immediately afterwards.
sc->m_devContext->FinalizeFrameBuffer(fbRes->GetFrameIndex());
const uint64_t readyEnd = Nanotime();
const uint64_t readyEnd = CFrameScheduler::Nanotime();
uint64_t postProcessTime = cpuCopyStart - fbRes->GetPostProcessStart();
uint64_t copyTime = readyEnd - cpuCopyStart;
@@ -391,6 +375,8 @@ void CSwapChainProcessor::CompletionFunction(
sc->m_postProcessors[fbRes->GetFrameIndex()].RecordTiming(
fbRes->GetTimingEffectIndex(), fbRes->GetTimingToken(),
fbRes->IsFullCopy(), postProcessTime + copyTime + readyTime);
sc->m_devContext->RecordFrameTiming(
postProcessTime + copyTime + readyTime);
sc->m_devContext->SetFrameTiming(fbRes->GetFrameIndex(),
fbRes->GetCaptureTime(), postProcessTime, copyTime, readyTime);
sc->m_devContext->CompleteFrameBuffer(fbRes->GetFrameIndex());
@@ -643,9 +629,11 @@ bool CSwapChainProcessor::SwapChainNewFrame(ComPtr<IDXGIResource> acquiredBuffer
DXGI_COLOR_SPACE_TYPE colorSpace, UINT sdrWhiteLevel,
uint64_t captureStart)
{
const uint64_t postProcessStart = Nanotime();
const uint64_t postProcessStart = CFrameScheduler::Nanotime();
const uint64_t captureTime = postProcessStart - captureStart;
m_devContext->ObserveFrame(postProcessStart);
// Preserve the fast drop path: never hold an IddCx frame while waiting for
// a slow or disconnected client. We have not read its rectangles, so force
// the next published frame to invalidate the entire image.
@@ -874,12 +862,21 @@ bool CSwapChainProcessor::SwapChainNewFrame(ComPtr<IDXGIResource> acquiredBuffer
SetFullPendingDamage();
// Adaptive effects need comparable full-frame samples until they lock.
if (m_postProcessors[0].RequiresFullDamage())
const bool requiresFullDamage =
m_postProcessors[0].RequiresFullDamage();
if (requiresFullDamage)
SetFullPendingDamage();
if (noImageUpdate && !m_hasPendingDamage)
return true;
uint32_t scheduleGeneration = 0;
if (!m_devContext->SelectFrame(CFrameScheduler::Nanotime(),
needsReconfigure || postProcessFormatChanged ||
frameMetadataChanged || requiresFullDamage,
scheduleGeneration))
return true;
const D12FrameFormat& dstFormat =
m_postProcessors[0].GetOutputFormat();
const unsigned pitch = m_postProcessors[0].GetOutputPitch();
@@ -1000,7 +997,7 @@ bool CSwapChainProcessor::SwapChainNewFrame(ComPtr<IDXGIResource> acquiredBuffer
ClipDirtyRects(currentDirtyRects, &nbDirtyRects,
dstFormat.width, dstFormat.height);
const uint64_t copyStart = Nanotime();
const uint64_t copyStart = CFrameScheduler::Nanotime();
fbRes->SetTiming(captureTime, postProcessStart, copyStart);
copySlot->SetCompletionCallback(&CompletionFunction, this, fbRes);
@@ -1070,7 +1067,8 @@ bool CSwapChainProcessor::SwapChainNewFrame(ComPtr<IDXGIResource> acquiredBuffer
return false;
}
if (!m_devContext->PublishFrameBuffer(buffer.frameIndex))
if (!m_devContext->PublishFrameBuffer(
buffer.frameIndex, scheduleGeneration))
{
SetFullPendingDamage();
return false;