xbmc/utils/MovingSpeed.cpp

   1 /*
   2  *  Copyright (C) 2022 Team Kodi
   3  *  This file is part of Kodi - https://kodi.tv
   4  *
   5  *  SPDX-License-Identifier: GPL-2.0-or-later
   6  *  See LICENSES/README.md for more information.
   7  */
   8
   9 #include "MovingSpeed.h"
  10
  11 #include "utils/MathUtils.h"
  12 #include "utils/TimeUtils.h"
  13 #include "utils/log.h"
  14
  15 void UTILS::MOVING_SPEED::CMovingSpeed::AddEventConfig(uint32_t eventId,
  16                                                        float acceleration,
  17                                                        float maxVelocity,
  18                                                        uint32_t resetTimeout)
  19 {
  20   EventCfg eventCfg{acceleration, maxVelocity, resetTimeout};
  21   m_eventsData.emplace(eventId, EventData{eventCfg});
  22 }
  23
  24 void UTILS::MOVING_SPEED::CMovingSpeed::AddEventConfig(uint32_t eventId, EventCfg event)
  25 {
  26   m_eventsData.emplace(eventId, EventData{event});
  27 }
  28
  29 void UTILS::MOVING_SPEED::CMovingSpeed::AddEventMapConfig(MapEventConfig& configs)
  30 {
  31   for (auto& cfg : configs)
  32   {
  33     AddEventConfig(static_cast<uint32_t>(cfg.first), cfg.second);
  34   }
  35 }
  36
  37 void UTILS::MOVING_SPEED::CMovingSpeed::Reset()
  38 {
  39   m_currentEventId = 0;
  40   for (auto& eventPair : m_eventsData)
  41   {
  42     Reset(eventPair.first);
  43   }
  44 }
  45
  46 void UTILS::MOVING_SPEED::CMovingSpeed::Reset(uint32_t eventId)
  47 {
  48   auto mapIt = m_eventsData.find(eventId);
  49   if (mapIt == m_eventsData.end())
  50   {
  51     CLog::LogF(LOGWARNING, "Cannot reset Event ID {} configuration", eventId);
  52   }
  53   else
  54   {
  55     EventData& event = mapIt->second;
  56     event.m_currentVelocity = 1.0f;
  57     event.m_lastFrameTime = 0;
  58   }
  59 }
  60
  61 float UTILS::MOVING_SPEED::CMovingSpeed::GetUpdatedDistance(uint32_t eventId)
  62 {
  63   auto mapEventIt = m_eventsData.find(eventId);
  64
  65   if (mapEventIt == m_eventsData.end())
  66   {
  67     CLog::LogF(LOGDEBUG, "No event set for event ID {}", eventId);
  68     return 0;
  69   }
  70
  71   EventData& eventData = mapEventIt->second;
  72   EventCfg& eventCfg = eventData.m_config;
  73
  74   uint32_t currentFrameTime{CTimeUtils::GetFrameTime()};
  75   uint32_t deltaFrameTime{currentFrameTime - eventData.m_lastFrameTime};
  76   float distance = (eventCfg.m_delta == 0.0f) ? 1.0f : eventCfg.m_delta;
  77
  78   if (eventData.m_lastFrameTime != 0 && deltaFrameTime > eventCfg.m_resetTimeout)
  79   {
  80     // If the delta time exceed the timeout then reset values
  81     Reset(eventId);
  82   }
  83   else if (m_currentEventId != eventId)
  84   {
  85     // If the event id is changed then reset values
  86     Reset(eventId);
  87   }
  88   else if (eventData.m_lastFrameTime != 0)
  89   {
  90     // Calculate the new speed based on time so as not to depend on the frame rate
  91     eventData.m_currentVelocity +=
  92         eventCfg.m_acceleration * (static_cast<float>(deltaFrameTime) / 1000);
  93
  94     if (eventCfg.m_maxVelocity > 0 && eventData.m_currentVelocity > eventCfg.m_maxVelocity)
  95       eventData.m_currentVelocity = eventCfg.m_maxVelocity;
  96
  97     distance = eventData.m_currentVelocity * (static_cast<float>(deltaFrameTime) / 1000);
  98     if (eventCfg.m_delta > 0.0f)
  99       distance = MathUtils::RoundF(distance, eventCfg.m_delta);
 100   }
 101
 102   m_currentEventId = eventId;
 103   eventData.m_lastFrameTime = currentFrameTime;
 104   return distance;
 105 }
 106
 107 UTILS::MOVING_SPEED::EventType UTILS::MOVING_SPEED::ParseEventType(std::string_view eventType)
 108 {
 109   if (eventType == "up")
 110     return EventType::UP;
 111   else if (eventType == "down")
 112     return EventType::DOWN;
 113   else if (eventType == "left")
 114     return EventType::LEFT;
 115   else if (eventType == "right")
 116     return EventType::RIGHT;
 117   else
 118   {
 119     CLog::LogF(LOGERROR, "Unsupported event type \"{}\"", eventType);
 120     return EventType::NONE;
 121   }
 122 }