1 files changed, 137 insertions, 0 deletions
diff --git a/xbmc/windowing/windows/VideoSyncD3D.cpp b/xbmc/windowing/windows/VideoSyncD3D.cpp
new file mode 100644
index 0000000..d95374f
--- /dev/null
+++ b/xbmc/windowing/windows/VideoSyncD3D.cpp
@@ -0,0 +1,137 @@
+/*
+ *  Copyright (C) 2005-2018 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#include "VideoSyncD3D.h"
+
+#include "Utils/MathUtils.h"
+#include "Utils/TimeUtils.h"
+#include "rendering/dx/DeviceResources.h"
+#include "rendering/dx/RenderContext.h"
+#include "utils/StringUtils.h"
+#include "utils/XTimeUtils.h"
+#include "utils/log.h"
+#include "windowing/GraphicContext.h"
+
+#include <mutex>
+
+using namespace std::chrono_literals;
+
+void CVideoSyncD3D::OnLostDisplay()
+{
+  if (!m_displayLost)
+  {
+    m_displayLost = true;
+    m_lostEvent.Wait();
+  }
+}
+
+void CVideoSyncD3D::OnResetDisplay()
+{
+  m_displayReset = true;
+}
+
+void CVideoSyncD3D::RefreshChanged()
+{
+  m_displayReset = true;
+}
+
+bool CVideoSyncD3D::Setup(PUPDATECLOCK func)
+{
+  CLog::Log(LOGDEBUG, "CVideoSyncD3D: Setting up Direct3d");
+  std::unique_lock<CCriticalSection> lock(CServiceBroker::GetWinSystem()->GetGfxContext());
+  DX::Windowing()->Register(this);
+  m_displayLost = false;
+  m_displayReset = false;
+  m_lostEvent.Reset();
+  UpdateClock = func;
+
+  // we need a high priority thread to get accurate timing
+  if (!SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_TIME_CRITICAL))
+    CLog::Log(LOGDEBUG, "CVideoSyncD3D: SetThreadPriority failed");
+
+  return true;
+}
+
+void CVideoSyncD3D::Run(CEvent& stopEvent)
+{
+  int64_t Now;
+  int64_t LastVBlankTime;
+  int NrVBlanks;
+  double VBlankTime;
+  int64_t systemFrequency = CurrentHostFrequency();
+
+  // init the vblanktime
+  Now = CurrentHostCounter();
+  LastVBlankTime = Now;
+  m_lastUpdateTime = Now - systemFrequency;
+  while (!stopEvent.Signaled() && !m_displayLost && !m_displayReset)
+  {
+    // sleep until vblank
+    Microsoft::WRL::ComPtr<IDXGIOutput> pOutput;
+    DX::DeviceResources::Get()->GetOutput(&pOutput);
+    HRESULT hr = pOutput->WaitForVBlank();
+
+    // calculate how many vblanks happened
+    Now = CurrentHostCounter();
+    VBlankTime = (double)(Now - LastVBlankTime) / (double)systemFrequency;
+    NrVBlanks = MathUtils::round_int(VBlankTime * m_fps);
+
+    // update the vblank timestamp, update the clock and send a signal that we got a vblank
+    UpdateClock(NrVBlanks, Now, m_refClock);
+
+    // save the timestamp of this vblank so we can calculate how many vblanks happened next time
+    LastVBlankTime = Now;
+
+    if ((Now - m_lastUpdateTime) >= systemFrequency)
+    {
+      float fps = m_fps;
+      if (fps != GetFps())
+        break;
+    }
+
+    // because we had a vblank, sleep until half the refreshrate period because i think WaitForVBlank block any rendering stuf
+    // without sleeping we have freeze rendering
+    int SleepTime = (int)((LastVBlankTime + (systemFrequency / MathUtils::round_int(m_fps) / 2) - Now) * 1000 / systemFrequency);
+    if (SleepTime > 50)
+      SleepTime = 50; //failsafe
+    if (SleepTime > 0)
+      ::Sleep(SleepTime);
+  }
+
+  m_lostEvent.Set();
+  while (!stopEvent.Signaled() && m_displayLost && !m_displayReset)
+  {
+    KODI::TIME::Sleep(10ms);
+  }
+}
+
+void CVideoSyncD3D::Cleanup()
+{
+  CLog::Log(LOGDEBUG, "CVideoSyncD3D: Cleaning up Direct3d");
+
+  m_lostEvent.Set();
+  DX::Windowing()->Unregister(this);
+}
+
+float CVideoSyncD3D::GetFps()
+{
+  DXGI_MODE_DESC DisplayMode = {};
+  DX::DeviceResources::Get()->GetDisplayMode(&DisplayMode);
+
+  m_fps = (DisplayMode.RefreshRate.Denominator != 0) ? (float)DisplayMode.RefreshRate.Numerator / (float)DisplayMode.RefreshRate.Denominator : 0.0f;
+
+  if (m_fps == 0.0)
+    m_fps = 60.0f;
+
+  if (DX::Windowing()->Interlaced())
+  {
+    m_fps *= 2;
+  }
+  return m_fps;
+}
+