1 files changed, 122 insertions, 0 deletions
diff --git a/xbmc/utils/MovingSpeed.cpp b/xbmc/utils/MovingSpeed.cpp
new file mode 100644
index 0000000..1e4269e
--- /dev/null
+++ b/xbmc/utils/MovingSpeed.cpp
@@ -0,0 +1,122 @@
+/*
+ *  Copyright (C) 2022 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 "MovingSpeed.h"
+
+#include "utils/MathUtils.h"
+#include "utils/TimeUtils.h"
+#include "utils/log.h"
+
+void UTILS::MOVING_SPEED::CMovingSpeed::AddEventConfig(uint32_t eventId,
+                                                       float acceleration,
+                                                       float maxVelocity,
+                                                       uint32_t resetTimeout)
+{
+  EventCfg eventCfg{acceleration, maxVelocity, resetTimeout};
+  m_eventsData.emplace(eventId, EventData{eventCfg});
+}
+
+void UTILS::MOVING_SPEED::CMovingSpeed::AddEventConfig(uint32_t eventId, EventCfg event)
+{
+  m_eventsData.emplace(eventId, EventData{event});
+}
+
+void UTILS::MOVING_SPEED::CMovingSpeed::AddEventMapConfig(MapEventConfig& configs)
+{
+  for (auto& cfg : configs)
+  {
+    AddEventConfig(static_cast<uint32_t>(cfg.first), cfg.second);
+  }
+}
+
+void UTILS::MOVING_SPEED::CMovingSpeed::Reset()
+{
+  m_currentEventId = 0;
+  for (auto& eventPair : m_eventsData)
+  {
+    Reset(eventPair.first);
+  }
+}
+
+void UTILS::MOVING_SPEED::CMovingSpeed::Reset(uint32_t eventId)
+{
+  auto mapIt = m_eventsData.find(eventId);
+  if (mapIt == m_eventsData.end())
+  {
+    CLog::LogF(LOGWARNING, "Cannot reset Event ID {} configuration", eventId);
+  }
+  else
+  {
+    EventData& event = mapIt->second;
+    event.m_currentVelocity = 1.0f;
+    event.m_lastFrameTime = 0;
+  }
+}
+
+float UTILS::MOVING_SPEED::CMovingSpeed::GetUpdatedDistance(uint32_t eventId)
+{
+  auto mapEventIt = m_eventsData.find(eventId);
+
+  if (mapEventIt == m_eventsData.end())
+  {
+    CLog::LogF(LOGDEBUG, "No event set for event ID {}", eventId);
+    return 0;
+  }
+
+  EventData& eventData = mapEventIt->second;
+  EventCfg& eventCfg = eventData.m_config;
+
+  uint32_t currentFrameTime{CTimeUtils::GetFrameTime()};
+  uint32_t deltaFrameTime{currentFrameTime - eventData.m_lastFrameTime};
+  float distance = (eventCfg.m_delta == 0.0f) ? 1.0f : eventCfg.m_delta;
+
+  if (eventData.m_lastFrameTime != 0 && deltaFrameTime > eventCfg.m_resetTimeout)
+  {
+    // If the delta time exceed the timeout then reset values
+    Reset(eventId);
+  }
+  else if (m_currentEventId != eventId)
+  {
+    // If the event id is changed then reset values
+    Reset(eventId);
+  }
+  else if (eventData.m_lastFrameTime != 0)
+  {
+    // Calculate the new speed based on time so as not to depend on the frame rate
+    eventData.m_currentVelocity +=
+        eventCfg.m_acceleration * (static_cast<float>(deltaFrameTime) / 1000);
+
+    if (eventCfg.m_maxVelocity > 0 && eventData.m_currentVelocity > eventCfg.m_maxVelocity)
+      eventData.m_currentVelocity = eventCfg.m_maxVelocity;
+
+    distance = eventData.m_currentVelocity * (static_cast<float>(deltaFrameTime) / 1000);
+    if (eventCfg.m_delta > 0.0f)
+      distance = MathUtils::RoundF(distance, eventCfg.m_delta);
+  }
+
+  m_currentEventId = eventId;
+  eventData.m_lastFrameTime = currentFrameTime;
+  return distance;
+}
+
+UTILS::MOVING_SPEED::EventType UTILS::MOVING_SPEED::ParseEventType(std::string_view eventType)
+{
+  if (eventType == "up")
+    return EventType::UP;
+  else if (eventType == "down")
+    return EventType::DOWN;
+  else if (eventType == "left")
+    return EventType::LEFT;
+  else if (eventType == "right")
+    return EventType::RIGHT;
+  else
+  {
+    CLog::LogF(LOGERROR, "Unsupported event type \"{}\"", eventType);
+    return EventType::NONE;
+  }
+}