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GpxParser.cpp
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#include "GpxParser.h"
#include <QFile>
#include <QXmlStreamReader>
#include <QDebug>
#include <QDateTime>
#include <math.h>
#include "HelperFunctions.h"
GpxParser::GpxParser() : TourData()
{
}
bool GpxParser::loadGpx( QString fileName )
{
reset();
filterReset( 0.0, FILTERGRADE );
filterReset( 0.0, FILTERALTIT );
//Open a XML stream for the file
QXmlStreamReader Rxml;
QFile file(fileName);
if( !file.open(QIODevice::ReadOnly | QFile::Text) )
{
return false;
}
double lastLat = -1, lastLon = -1, lastTime = -1, time = 0, distance = 0, ele = 0, lastEle = -1, distanceGpx = 0;
double factor = ( 180.0 / pow(2,31) );
double lat = 0, lon = 0, distSinceLast = 0, power = 0, cadence = 0, heartrate = 0;
double breakSecs = 0;
bool cadenceRead = false, powerRead = false, heartrateRead = false, distanceRead = false;
//Parse
Rxml.setDevice(&file);
while( !Rxml.atEnd() )
{
Rxml.readNext();
if( Rxml.isStartElement() && ( Rxml.name() == QString( "gpx" ) ) )
{
for( int i = 0; i < Rxml.attributes().size(); i++ )
{
if( Rxml.attributes().at(i).name() == QString( "creator" ) )
{
deviceInfo_t deviceInfo;
deviceInfo.name = Rxml.attributes().at(i).value().toString();
deviceInfo.battery = "";
deviceInfo.deviceId = 0;
m_deviceInfo.append( deviceInfo );
}
}
}
//Track Name
if( Rxml.isStartElement() && ( Rxml.name() == QString( "name" ) ) )
{
m_workoutName = Rxml.readElementText();
}
//GPS Position
if( Rxml.isStartElement() && ( Rxml.name() == QString( "trkpt" ) ) )
{
if( Rxml.attributes().size() != 0 )
{
for( int i = 0; i < Rxml.attributes().size(); i++ )
{
if( Rxml.attributes().at(i).name() == QString( "lat" ) )
{
lat = Rxml.attributes().at(i).value().toDouble();
m_posRead = true;
}
else if( Rxml.attributes().at(i).name() == QString( "lon" ) )
{
lon = Rxml.attributes().at(i).value().toDouble();
m_posRead = true;
}
}
if( lastLat == -1 )
{
lastLat = lat;
lastLon = lon;
distance = 0;
}
else
{
HelperFunctions hF;
distSinceLast = hF.getDistanceFromLatLonInKm( lastLat, lastLon, lat, lon );
lastLat = lat;
lastLon = lon;
}
}
}
else if( Rxml.isStartElement() && ( Rxml.name() == QString( "power" ) ) )
{
power = Rxml.readElementText().toDouble();
powerRead = true;
}
else if( Rxml.isStartElement() && ( Rxml.name() == QString( "distance" ) ) )
{
distanceGpx = Rxml.readElementText().toDouble();
distanceRead = true;
}
else if( Rxml.isStartElement() && ( Rxml.name() == QString( "cadence" ) ) )
{
cadence = Rxml.readElementText().toDouble();
cadenceRead = true;
}
else if( Rxml.isStartElement() && ( Rxml.name() == QString( "hr" ) ) )
{
heartrate = Rxml.readElementText().toDouble();
heartrateRead = true;
}
//Altitude
else if( Rxml.isStartElement() && ( Rxml.name() == QString( "ele" ) ) )
{
if( lastEle == -1 )
{
ele = Rxml.readElementText().toDouble();
filterReset( ele, FILTERALTIT );
lastEle = ele;
}
else ele = filter( Rxml.readElementText().toDouble(), FILTERALTIT );
}
//Timestamp
else if( Rxml.isStartElement() && ( Rxml.name() == QString( "time" ) ) )
{
QString timeString = Rxml.readElementText();
timeString.remove( "T" );
timeString.remove( "Z" );
time = QDateTime( QDate( 1989, 12, 31 ), QTime( 1, 0, 0 ) ).secsTo( QDateTime().fromString( timeString, "yyyy-MM-ddhh:mm:ss.zzz" ) );
if( !time ) time = QDateTime( QDate( 1989, 12, 31 ), QTime( 1, 0, 0 ) ).secsTo( QDateTime().fromString( timeString, "yyyy-MM-ddhh:mm:ss" ) );
if( lastTime == -1 ) lastTime = time;
}
//Copy data into vectors
if( Rxml.isEndElement() && ( Rxml.name() == QString( "trkpt" ) ) )
{
distance += distSinceLast;
m_tourPosLat.append( lat / factor );
m_tourPosLong.append( lon / factor );
if( distanceRead )
m_tourDistance.append( distanceGpx / 1000.0 );
else
m_tourDistance.append( distance );
m_tourTimeStamp.append( time );
double speedCalc = 0;
if( time-lastTime != 0 ) speedCalc = distSinceLast / (time-lastTime) * 3600;
static double lastSpeedCalc = 0;
m_tourSpeed.append( ( lastSpeedCalc + speedCalc ) / 2.0 );
if( ( time - lastTime > 30 && distSinceLast < 0.05 ) //if time >30s and distance < 50m, or speed < 1km/h, it must be a break...
|| ( ( lastSpeedCalc + speedCalc ) / 2.0 ) < 1.0 ) breakSecs += time - lastTime;
lastSpeedCalc = speedCalc;
m_tourTemperature.append( 0 );
m_tourAltitude.append( ele );
double grade = 0;
if( distSinceLast > 0.0005 ) grade = ( ele - lastEle ) / distSinceLast / 10.0;
m_tourGrade.append( filter( grade, FILTERGRADE ) );
m_tourBatterySoc.append( -1 );
lastTime = time;
lastEle = ele;
if(cadenceRead) m_tourCadence.append( cadence );
if(powerRead) m_tourPower.append( power );
if(heartrateRead) m_tourHeartRate.append( heartrate );
}
}
file.close();
//Create session statistics
m_session.startTime = m_tourTimeStamp.first();
m_session.totalDistance = m_tourDistance.last() * 1000;
m_session.totalElapsedTime = m_tourTimeStamp.last() - m_tourTimeStamp.first();
m_session.totalTimerTime = m_tourTimeStamp.last() - m_tourTimeStamp.first() - breakSecs;
if( m_session.totalTimerTime < 0 ) m_session.totalTimerTime = 0.0;
double alt = m_tourAltitude.first();
double lastAlt = alt;
double minAlt = alt;
double maxAlt = alt;
double gradePos = 0, gradeNeg = 0;
for( int i = 1; i < m_tourAltitude.size(); i++ )
{
alt = m_tourAltitude.at(i);
if( alt > maxAlt ) maxAlt = alt;
else if( alt < minAlt ) minAlt = alt;
if( alt > lastAlt ) gradePos += alt - lastAlt;
else if( alt < lastAlt ) gradeNeg += lastAlt - alt;
lastAlt = alt;
}
for( int i = 1; i < m_tourSpeed.size(); i++ )
{
// if there is a value over 120km/h it most probably is an error in the track -> filter
if( m_session.maxSpeed < m_tourSpeed.at(i) / 3.6
&& m_tourSpeed.at(i) < 120 ) m_session.maxSpeed = m_tourSpeed.at(i) / 3.6;
}
for( int i = 1; i < m_tourGrade.size(); i++ )
{
if( m_session.maxGrade < m_tourGrade.at(i) ) m_session.maxGrade = m_tourGrade.at(i);
else if( m_session.minGrade > m_tourGrade.at(i) ) m_session.minGrade = m_tourGrade.at(i);
}
double helpPower = 0;
for( int i = 1; i < m_tourPower.size(); i++ )
{
if( m_session.maxPower < m_tourPower.at(i) ) m_session.maxPower = m_tourPower.at(i);
if( m_tourPower.size() == m_tourTimeStamp.size() )
{
double timeDiff = m_tourTimeStamp.at(i) - m_tourTimeStamp.at(i - 1);
helpPower += m_tourPower.at(i) * timeDiff;
m_session.totalCalories += m_tourPower.at(i) * timeDiff / (4184 * 0.215);
m_tourCalories.append(m_session.totalCalories);
}
}
if( m_session.totalTimerTime != 0 ) m_session.avgPower = helpPower / m_session.totalTimerTime;
double helpCadence = 0;
double helpCadenceTime = m_session.totalElapsedTime;
for( int i = 1; i < m_tourCadence.size(); i++ )
{
if( m_session.maxCadence < m_tourCadence.at(i) ) m_session.maxCadence = m_tourCadence.at(i);
if( m_tourCadence.size() == m_tourTimeStamp.size() )
{
double timeDiff = m_tourTimeStamp.at(i) - m_tourTimeStamp.at(i - 1);
if( m_tourCadence.at(i) > 0 ) helpCadence += m_tourCadence.at(i) * timeDiff;
else helpCadenceTime -= timeDiff;
}
}
if( helpCadenceTime > 0 ) m_session.avgCadence = helpCadence / helpCadenceTime;
double helpHeartRate = 0;
for( int i = 1; i < m_tourHeartRate.size(); i++ )
{
if( m_session.maxHeartRate < m_tourHeartRate.at(i) ) m_session.maxHeartRate = m_tourHeartRate.at(i);
else if( m_session.minHeartRate > m_tourHeartRate.at(i) ) m_session.minHeartRate = m_tourHeartRate.at(i);
else if( m_session.minHeartRate == 0 ) m_session.minHeartRate = m_tourHeartRate.at(i);
if( m_tourHeartRate.size() == m_tourTimeStamp.size() )
{
double timeDiff = m_tourTimeStamp.at(i) - m_tourTimeStamp.at(i - 1);
helpHeartRate += m_tourHeartRate.at(i) * timeDiff;
}
}
if( m_session.totalTimerTime != 0 ) m_session.avgHeartRate = helpHeartRate / m_session.totalElapsedTime;
m_session.altitudeMax = maxAlt;
m_session.altitudeMin = minAlt;
m_session.ascent = gradePos;
m_session.descent = gradeNeg;
if( m_session.totalTimerTime > 0 ) m_session.avgSpeed = m_session.totalDistance / m_session.totalTimerTime;
else m_session.avgSpeed = 0;
return true;
}
double GpxParser::filter( double newValue, int channel )
{
m_filter[m_cnt[channel]][channel] = newValue;
m_cnt[channel]++;
if( m_cnt[channel] >= FILTERSIZE ) m_cnt[channel] = 0;
double sum = 0;
for( int i = 0; i < FILTERSIZE; i++ ) sum += m_filter[i][channel];
return sum / FILTERSIZE;
}
void GpxParser::filterReset( double initValue, int channel )
{
for( int i = 0; i < FILTERSIZE; i++ )
{
m_filter[i][channel] = initValue;
}
m_cnt[channel] = 0;
}