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https://github.com/gnif/LookingGlass.git
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[host] switch to fast polling mode, fixes stuttering issues
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parent
afff50dfde
commit
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@ -69,6 +69,7 @@ KVMFRFrame;
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#define KVMFR_HEADER_FLAG_FRAME 1 // frame update available
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#define KVMFR_HEADER_FLAG_CURSOR 2 // cursor update available
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#define KVMFR_HEADER_FLAG_RESTART 4 // restart signal from client
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#define KVMFR_HEADER_FLAG_READY 8 // ready signal from client
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typedef struct KVMFRHeader
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{
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@ -30,7 +30,7 @@ Service * Service::m_instance = NULL;
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Service::Service() :
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m_initialized(false),
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m_memory(NULL),
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m_readyEvent(INVALID_HANDLE_VALUE),
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m_timer(NULL),
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m_capture(NULL),
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m_header(NULL),
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m_frameIndex(0)
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@ -73,11 +73,10 @@ bool Service::Initialize(ICapture * captureDevice)
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if (!InitPointers())
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return false;
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m_readyEvent = m_ivshmem->CreateVectorEvent(0);
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if (m_readyEvent == INVALID_HANDLE_VALUE)
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m_timer = CreateWaitableTimer(NULL, TRUE, NULL);
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if (!m_timer)
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{
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DEBUG_ERROR("Failed to get event for vector 0");
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DeInitialize();
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DEBUG_ERROR("Failed to create waitable timer");
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return false;
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}
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@ -117,10 +116,10 @@ bool Service::InitPointers()
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void Service::DeInitialize()
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{
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if (m_readyEvent != INVALID_HANDLE_VALUE)
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if (m_timer)
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{
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CloseHandle(m_readyEvent);
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m_readyEvent = INVALID_HANDLE_VALUE;
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CloseHandle(m_timer);
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m_timer = NULL;
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}
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m_header = NULL;
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@ -153,8 +152,7 @@ bool Service::Process()
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frame.bufferSize = m_frameSize;
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// wait for the host to notify that is it is ready to proceed
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bool eventDone = false;
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while (!eventDone)
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while (true)
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{
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// check if the client has flagged a restart
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if (m_header->flags & KVMFR_HEADER_FLAG_RESTART)
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@ -164,29 +162,23 @@ bool Service::Process()
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break;
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}
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switch (WaitForSingleObject(m_readyEvent, 200))
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// check if the client has flagged it's ready
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if (m_header->flags & KVMFR_HEADER_FLAG_READY)
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{
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case WAIT_ABANDONED:
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DEBUG_ERROR("Wait abandoned");
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return false;
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case WAIT_OBJECT_0:
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eventDone = true;
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InterlockedAnd8((char *)&m_header->flags, ~(KVMFR_HEADER_FLAG_READY));
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break;
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}
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case WAIT_TIMEOUT:
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continue;
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case WAIT_FAILED:
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DEBUG_ERROR("Wait failed");
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return false;
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default:
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DEBUG_ERROR("Unknown error");
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// wait for 100ns before polling again
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LARGE_INTEGER timeout;
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timeout.QuadPart = -100;
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if (!SetWaitableTimer(m_timer, &timeout, 0, NULL, NULL, FALSE))
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{
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DEBUG_ERROR("Failed to set waitable timer");
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return false;
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}
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WaitForSingleObject(m_timer, INFINITE);
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}
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ResetEvent(m_readyEvent);
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bool ok = false;
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bool cursorOnly = false;
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@ -51,7 +51,7 @@ private:
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bool m_initialized;
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uint8_t * m_memory;
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IVSHMEM * m_ivshmem;
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HANDLE m_readyEvent;
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HANDLE m_timer;
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ICapture * m_capture;
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KVMFRHeader * m_header;
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