QDateTime GPSDataParser::findPrevDate(const QDateTime& dateTime, int secs)
{
// We will find the item in GPS data list where the time is
// at the maximum smaller than 'secs' mn of the value to match.
QDateTime itemFound = dateTime.addSecs((-1)*secs);
bool found = false;
for (GPSDataMap::ConstIterator it = m_GPSDataMap.constBegin();
it != m_GPSDataMap.constEnd(); ++it )
{
if (it.key() < dateTime)
{
if (it.key() > itemFound)
{
itemFound = it.key();
found = true;
}
}
}
if (found)
return itemFound;
return QDateTime();
}
void KMLGPSDataParser::CreateTrackPoints(QDomElement& parent, QDomDocument& root, int timeZone, int altitudeMode)
{
kmlDocument = &root;
//kDebug(AREA_CODE_LOADING) << "creation d'un trackpoint" ;
// create the points
QDomElement kmlPointsFolder = addKmlElement(parent, QLatin1String("Folder"));
addKmlTextElement(kmlPointsFolder, QLatin1String("name"), i18n("Points"));
addKmlTextElement(kmlPointsFolder, QLatin1String("visibility"), QLatin1String("0"));
addKmlTextElement(kmlPointsFolder, QLatin1String("open"), QLatin1String("0"));
int i = 0;
// cache the end to not recalculate it with large number of points
GPSDataMap::ConstIterator end (m_GPSDataMap.constEnd());
for (GPSDataMap::ConstIterator it = m_GPSDataMap.constBegin(); it != end; ++it, ++i)
{
QDomElement kmlPointPlacemark = addKmlElement(kmlPointsFolder, QLatin1String("Placemark"));
addKmlTextElement(kmlPointPlacemark, QLatin1String("name"), QString::fromUtf8("%1 %2 ").arg(i18n("Point")).arg(i));
addKmlTextElement(kmlPointPlacemark, QLatin1String("styleUrl"), QLatin1String("#track"));
QDomElement kmlTimeStamp = addKmlElement(kmlPointPlacemark, QLatin1String("TimeStamp"));
// GPS device are sync in time by satellite using GMT time.
// If the camera time is different than GMT time, we want to
// convert the GPS time to localtime of the picture to be display
// in the same timeframe
QDateTime GPSLocalizedTime = it.key().addSecs(timeZone*3600);
addKmlTextElement(kmlTimeStamp, QLatin1String("when"), GPSLocalizedTime.toString(QLatin1String("yyyy-MM-ddThh:mm:ssZ")));
QDomElement kmlGeometry = addKmlElement(kmlPointPlacemark, QLatin1String("Point"));
addKmlTextElement(kmlPointPlacemark, QLatin1String("visibility"), QLatin1String("0"));
if (it.value().latitude())
{
addKmlTextElement(kmlGeometry, QLatin1String("coordinates"),
QString::fromUtf8("%1,%2,%3 ")
.arg(it.value().longitude()).arg(it.value().latitude()).arg(it.value().altitude()));
}
else
{
addKmlTextElement(kmlGeometry, QLatin1String("coordinates"), QString::fromUtf8("%1,%2 ").arg(it.value().longitude()).arg(it.value().latitude()));
}
if (altitudeMode == 2 )
{
addKmlTextElement(kmlGeometry, QLatin1String("altitudeMode"), QLatin1String("absolute"));
}
else if (altitudeMode == 1 )
{
addKmlTextElement(kmlGeometry, QLatin1String("altitudeMode"), QLatin1String("relativeToGround"));
}
else
{
addKmlTextElement(kmlGeometry, QLatin1String("altitudeMode"), QLatin1String("clampToGround"));
}
}
}
bool GPSDataParser::matchDate(const QDateTime& photoDateTime, int maxGapTime, int timeZone,
bool interpolate, int interpolationDstTime,
GPSDataContainer& gpsData)
{
// GPS device are sync in time by satelite using GMT time.
// If the camera time is different than GMT time, we need to convert it to GMT time
// Using the time zone.
QDateTime cameraGMTDateTime = photoDateTime.addSecs(timeZone*(-1));
kDebug( 51000 ) << "cameraGMTDateTime: " << cameraGMTDateTime << endl;
// We trying to find the right date in the GPS points list.
bool findItem = false;
int nbSecItem = maxGapTime;
int nbSecs;
for (GPSDataMap::ConstIterator it = m_GPSDataMap.constBegin();
it != m_GPSDataMap.constEnd(); ++it )
{
// Here we check a possible accuracy in seconds between the
// Camera GMT time and the GPS device GMT time.
nbSecs = abs(cameraGMTDateTime.secsTo( it.key() ));
// We tring to find the minimal accuracy.
if( nbSecs < maxGapTime && nbSecs < nbSecItem)
{
gpsData = m_GPSDataMap[it.key()];
findItem = true;
nbSecItem = nbSecs;
}
}
if (findItem) return true;
// If we can't find it, we will trying to interpolate the GPS point.
if (interpolate)
{
// The interpolate GPS point will be separate by at the maximum of 'interpolationDstTime'
// seconds before and after the next and previous real GPS point found.
QDateTime prevDateTime = findPrevDate(cameraGMTDateTime, interpolationDstTime);
QDateTime nextDateTime = findNextDate(cameraGMTDateTime, interpolationDstTime);
if (!nextDateTime.isNull() && !prevDateTime.isNull())
{
GPSDataContainer prevGPSPoint = m_GPSDataMap[prevDateTime];
GPSDataContainer nextGPSPoint = m_GPSDataMap[nextDateTime];
double alt1 = prevGPSPoint.altitude();
double lon1 = prevGPSPoint.longitude();
double lat1 = prevGPSPoint.latitude();
uint t1 = prevDateTime.toTime_t();
double alt2 = nextGPSPoint.altitude();
double lon2 = nextGPSPoint.longitude();
double lat2 = nextGPSPoint.latitude();
uint t2 = nextDateTime.toTime_t();
uint tCor = cameraGMTDateTime.toTime_t();
if (tCor-t1 != 0)
{
gpsData.setAltitude(alt1 + (alt2-alt1) * (tCor-t1)/(t2-t1));
gpsData.setLatitude(lat1 + (lat2-lat1) * (tCor-t1)/(t2-t1));
gpsData.setLongitude(lon1 + (lon2-lon1) * (tCor-t1)/(t2-t1));
gpsData.setInterpolated(true);
return true;
}
}
}
return false;
}