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/*
* 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.
*/
#pragma once
#include <string>
#include <vector>
#define DIFFRINGSIZE 120
#define VFR_DETECTION_THRESHOLD 3
#define VFR_PATTERN_THRESHOLD 2
class CPtsTracker
{
public:
CPtsTracker();
void Add(double pts);
void Flush(); //flush the saved pattern and the ringbuffer
void ResetVFRDetection(void);
int GetPatternLength() { return m_patternlength; }
double GetFrameDuration() { return m_frameduration; }
double GetMaxFrameDuration(void) { return m_maxframeduration; }
double GetMinFrameDuration(void) { return m_minframeduration; }
bool HasFullBuffer() { return m_ringfill == DIFFRINGSIZE; }
bool VFRDetection(void) { return ((m_VFRCounter >= VFR_DETECTION_THRESHOLD) && (m_patternCounter >= VFR_PATTERN_THRESHOLD)); }
private:
double m_prevpts; //last pts added
double m_diffring[DIFFRINGSIZE]; //ringbuffer of differences between pts'
int m_ringpos; //position of last diff added to ringbuffer
int m_ringfill; //how many diffs we have in the ringbuffer
double GetDiff(int diffnr); //gets diffs from now to the past
void GetPattern(std::vector<double>& pattern); //gets the current pattern
static bool MatchDiff(double diff1, double diff2); //checks if two diffs match by MAXERR
static bool MatchDifftype(int diffs1[], int diffs2[], int nrdiffs); //checks if the difftypes match
//checks if the current pattern matches with the saved m_pattern with offset m_patternpos
bool CheckPattern(std::vector<double>& pattern);
double CalcFrameDuration(); //calculates the frame duration from m_pattern
std::vector<double> m_pattern, m_lastPattern; //the last saved pattern
double m_frameduration; //frameduration exposed to VideoPlayer, used for calculating the fps
double m_maxframeduration; //Max value detected for frame duration (for VFR files case)
double m_minframeduration; //Min value detected for frame duration (for VFR files case)
bool m_haspattern; //for the log and detecting VFR files case
int m_patternlength; //for the codec info
int m_VFRCounter; //retry counter for VFR detection
int m_patternCounter;
std::string GetPatternStr(); //also for the log
};
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