1 files changed, 131 insertions, 0 deletions
diff --git a/xbmc/windowing/gbm/VideoSyncGbm.cpp b/xbmc/windowing/gbm/VideoSyncGbm.cpp
new file mode 100644
index 0000000..d113c90
--- /dev/null
+++ b/xbmc/windowing/gbm/VideoSyncGbm.cpp
@@ -0,0 +1,131 @@
+/*
+ *  Copyright (C) 2005-2021 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 "VideoSyncGbm.h"
+
+#include "ServiceBroker.h"
+#include "threads/Thread.h"
+#include "utils/TimeUtils.h"
+#include "utils/log.h"
+#include "windowing/GraphicContext.h"
+#include "windowing/WinSystem.h"
+#include "windowing/gbm/WinSystemGbm.h"
+#include "xf86drm.h"
+#include "xf86drmMode.h"
+
+#include <assert.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#include <unistd.h>
+
+CVideoSyncGbm::CVideoSyncGbm(void* clock)
+  : CVideoSync(clock), m_winSystem(CServiceBroker::GetWinSystem())
+{
+  if (!m_winSystem)
+    throw std::runtime_error("window system not available");
+}
+
+bool CVideoSyncGbm::Setup(PUPDATECLOCK func)
+{
+  UpdateClock = func;
+  m_abort = false;
+  m_winSystem->Register(this);
+  CLog::Log(LOGDEBUG, "CVideoSyncGbm::{} setting up", __FUNCTION__);
+
+  auto winSystemGbm = dynamic_cast<KODI::WINDOWING::GBM::CWinSystemGbm*>(m_winSystem);
+  if (!winSystemGbm)
+  {
+    CLog::Log(LOGWARNING, "CVideoSyncGbm::{}: failed to get winSystem", __FUNCTION__);
+    return false;
+  }
+
+  auto drm = winSystemGbm->GetDrm();
+  if (!drm)
+  {
+    CLog::Log(LOGWARNING, "CVideoSyncGbm::{}: failed to get drm", __FUNCTION__);
+    return false;
+  }
+
+  auto crtc = drm->GetCrtc();
+  if (!crtc)
+  {
+    CLog::Log(LOGWARNING, "CVideoSyncGbm::{}: failed to get crtc", __FUNCTION__);
+    return false;
+  }
+
+  uint64_t ns = 0;
+  m_crtcId = crtc->GetCrtcId();
+  m_fd = drm->GetFileDescriptor();
+  int s = drmCrtcGetSequence(m_fd, m_crtcId, &m_sequence, &ns);
+  m_offset = CurrentHostCounter() - ns;
+  if (s != 0)
+  {
+    CLog::Log(LOGWARNING, "CVideoSyncGbm::{}: drmCrtcGetSequence failed ({})", __FUNCTION__, s);
+    return false;
+  }
+
+  CLog::Log(LOGINFO, "CVideoSyncGbm::{}: opened (fd:{} crtc:{} seq:{} ns:{}:{})", __FUNCTION__,
+            m_fd, m_crtcId, m_sequence, ns, m_offset + ns);
+  return true;
+}
+
+void CVideoSyncGbm::Run(CEvent& stopEvent)
+{
+  /* This shouldn't be very busy and timing is important so increase priority */
+  CThread::GetCurrentThread()->SetPriority(ThreadPriority::ABOVE_NORMAL);
+
+  if (m_fd < 0)
+  {
+    CLog::Log(LOGWARNING, "CVideoSyncGbm::{}: failed to open device ({})", __FUNCTION__, m_fd);
+    return;
+  }
+  CLog::Log(LOGDEBUG, "CVideoSyncGbm::{}: started {}", __FUNCTION__, m_fd);
+
+  while (!stopEvent.Signaled() && !m_abort)
+  {
+    uint64_t sequence = 0, ns = 0;
+    usleep(1000);
+    int s = drmCrtcGetSequence(m_fd, m_crtcId, &sequence, &ns);
+    if (s != 0)
+    {
+      CLog::Log(LOGWARNING, "CVideoSyncGbm::{}: drmCrtcGetSequence failed ({})", __FUNCTION__, s);
+      break;
+    }
+
+    if (sequence == m_sequence)
+      continue;
+
+    UpdateClock(sequence - m_sequence, m_offset + ns, m_refClock);
+    m_sequence = sequence;
+  }
+}
+
+void CVideoSyncGbm::Cleanup()
+{
+  CLog::Log(LOGDEBUG, "CVideoSyncGbm::{}: cleaning up", __FUNCTION__);
+  m_winSystem->Unregister(this);
+}
+
+float CVideoSyncGbm::GetFps()
+{
+  m_fps = m_winSystem->GetGfxContext().GetFPS();
+  CLog::Log(LOGDEBUG, "CVideoSyncGbm::{}: fps:{}", __FUNCTION__, m_fps);
+  return m_fps;
+}
+
+void CVideoSyncGbm::OnResetDisplay()
+{
+  m_abort = true;
+}
+
+void CVideoSyncGbm::RefreshChanged()
+{
+  if (m_fps != m_winSystem->GetGfxContext().GetFPS())
+    m_abort = true;
+}