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[idd] resend the last captured frame if a new client connects

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This commit is contained in:
Geoffrey McRae
2023-04-14 14:07:30 +10:00
parent fd0cc6aa10
commit d6b26b0eb1
5 changed files with 59 additions and 8 deletions
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35
idd/LGIdd/CSwapChainProcessor.cpp
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@@ -3,11 +3,16 @@
#include <avrt.h>
#include "Debug.h"
#define LOCK_CONTEXT() \
while (InterlockedCompareExchange((volatile LONG*)&m_contextLock, 1, 0) != 0) {};
#define LOCK(lock) \
while (InterlockedCompareExchange((volatile LONG*)&(lock), 1, 0) != 0) {};
#define UNLOCK_CONTEXT() \
InterlockedExchange((volatile LONG*)&m_contextLock, 0);
#define UNLOCK(lock) \
InterlockedExchange((volatile LONG*)&(lock), 0);
#define LOCK_CONTEXT() LOCK(m_contextLock);
#define UNLOCK_CONTEXT() UNLOCK(m_contextLock);
#define LOCK_ST(st) LOCK((st).lock);
#define UNLOCK_ST(st) UNLOCK((st).lock);
CSwapChainProcessor::CSwapChainProcessor(CIndirectDeviceContext* devContext, IDDCX_SWAPCHAIN hSwapChain,
std::shared_ptr<Direct3DDevice> device, HANDLE newFrameEvent) :
@@ -197,6 +202,7 @@ void CSwapChainProcessor::FrameThread()
}
StagingTexture & st = m_cpuTex[m_texRIndex];
LOCK(st);
LOCK_CONTEXT();
HRESULT status = m_device->m_context->Map(st.tex.Get(), 0, D3D11_MAP_READ,
@@ -205,6 +211,7 @@ void CSwapChainProcessor::FrameThread()
if (FAILED(status))
{
UNLOCK(st);
if (status == DXGI_ERROR_WAS_STILL_DRAWING)
continue;
@@ -219,8 +226,11 @@ void CSwapChainProcessor::FrameThread()
m_devContext->SendFrame(st.width, st.height, st.map.RowPitch, st.format, st.map.pData);
InterlockedAdd(&m_copyCount, -1);
m_lastIndex = m_texRIndex;
if (++m_texRIndex == STAGING_TEXTURES)
m_texRIndex = 0;
UNLOCK(st);
}
}
@@ -254,4 +264,21 @@ bool CSwapChainProcessor::SetupStagingTexture(StagingTexture & st, int width, in
}
return true;
}
void CSwapChainProcessor::ResendLastFrame()
{
LOCK_CONTEXT()
StagingTexture & st = m_cpuTex[m_lastIndex];
LOCK_ST(st);
UNLOCK_CONTEXT();
if (!st.map.pData)
{
UNLOCK_ST(st);
return;
}
m_devContext->SendFrame(st.width, st.height, st.map.RowPitch, st.format, st.map.pData);
UNLOCK_ST(st);
}