static int writeGPSChannels(SampleRecord *sampleRecord, size_t currentTicks, GPSConfig *config){
int rate = SAMPLE_DISABLED;
{
size_t sr = config->dateCfg.sampleRate;
if (sr != SAMPLE_DISABLED){
if ((currentTicks % sr) == 0){
rate = HIGHER_SAMPLE_RATE(sr, rate);
sampleRecord->GPS_DateSample.intValue = getDate();
}
}
}
{
size_t sr = config->timeCfg.sampleRate;
if (sr != SAMPLE_DISABLED){
if ((currentTicks % sr) == 0){
rate = HIGHER_SAMPLE_RATE(sr, rate);
sampleRecord->GPS_TimeSample.floatValue = getUTCTime();
}
}
}
{
//latitude sample rate is a stand-in for position sample rate
size_t sr = config->latitudeCfg.sampleRate;
if (sr != SAMPLE_DISABLED){
if ((currentTicks % sr) == 0){
rate = HIGHER_SAMPLE_RATE(sr, rate);
sampleRecord->GPS_LatitueSample.floatValue = getLatitude();
sampleRecord->GPS_LongitudeSample.floatValue = getLongitude();
}
}
}
{
size_t sr = config->satellitesCfg.sampleRate;
if (sr != SAMPLE_DISABLED){
if ((currentTicks % sr) == 0){
rate = HIGHER_SAMPLE_RATE(sr, rate);
sampleRecord->GPS_SatellitesSample.intValue = getSatellitesUsedForPosition();
}
}
}
{
size_t sr = config->speedCfg.sampleRate;
if (sr != SAMPLE_DISABLED){
if ((currentTicks % sr) == 0){
rate = HIGHER_SAMPLE_RATE(sr, rate);
sampleRecord->GPS_SpeedSample.floatValue = getGPSSpeed() * 0.621371192; //convert to MPH
}
}
}
return rate;
}
static int writeTrackChannels(SampleRecord *sampleRecord, size_t currentTicks, TrackConfig *config){
int rate = SAMPLE_DISABLED;
{
size_t sr = config->lapCountCfg.sampleRate;
if (sr != SAMPLE_DISABLED){
if ((currentTicks % sr) == 0){
rate = HIGHER_SAMPLE_RATE(sr, rate);
sampleRecord->Track_LapCountSample.intValue = getLapCount();
}
}
}
{
size_t sr = config->splitTimeCfg.sampleRate;
if (sr != SAMPLE_DISABLED){
if ((currentTicks % sr) == 0){
rate = HIGHER_SAMPLE_RATE(sr, rate);
sampleRecord->Track_SplitTimeSample.floatValue = getLastSectorTime(); // getLastSplitTime()->getLastSectorTime() ?-jrwiebe
}
}
}
{
size_t sr = config->lapTimeCfg.sampleRate;
if (sr != SAMPLE_DISABLED){
if ((currentTicks % sr) == 0){
rate = HIGHER_SAMPLE_RATE(sr, rate);
sampleRecord->Track_LapTimeSample.floatValue = getLastLapTime();
}
}
}
{
size_t sr = config->distanceCfg.sampleRate;
if (sr != SAMPLE_DISABLED){
if ((currentTicks % sr) == 0){
rate = HIGHER_SAMPLE_RATE(sr, rate);
sampleRecord->Track_DistanceSample.floatValue = getGpsDistance() * 0.621371192; //convert to miles
}
}
}
{
size_t sr = config->predTimeCfg.sampleRate;
if (sr != SAMPLE_DISABLED){
if ((currentTicks % sr) == 0){
rate = HIGHER_SAMPLE_RATE(sr, rate);
sampleRecord->Track_PredTimeSample.floatValue = get_predicted_time(getGPSSpeed());
}
}
}
return rate;
}
float getGpsSpeedInMph()
{
return getGPSSpeed() * 0.621371192; //convert to MPH
}
/* Function to populate TSK Blackboard exif related attributes */
void extractExifData(ExifData * exifData, TskFile * pFile)
{
std::map<ExifTag, TSK_ATTRIBUTE_TYPE>::iterator it;
std::vector<TskBlackboardAttribute> attrs;
std::string datetime = "";
int timezone = 0;
for (it = tagMap.begin(); it != tagMap.end(); ++it)
{
ExifEntry * exifEntry = exif_data_get_entry(exifData, it->first);
char tag_data[256];
if (exifEntry == NULL)
continue;
if (it->first == EXIF_TAG_GPS_LATITUDE ||
it->first == EXIF_TAG_GPS_LONGITUDE)
{
// Check for the EXIF_IFD_GPS image file directory to avoid interoperability value
ExifIfd ifd = exif_entry_get_ifd(exifEntry);
if (ifd != EXIF_IFD_GPS)
continue;
exif_entry_get_value(exifEntry, tag_data, 256);
float decDegrees = getDecimalDegrees(tag_data);
char refValue[2];
if (it->first == EXIF_TAG_GPS_LATITUDE)
{
// Get the latitude reference value; used to determine if positive or negative decimal value
ExifEntry * latitudeRef = exif_data_get_entry(exifData, it->first);
exif_entry_get_value(latitudeRef, refValue,2);
if (strcmp(refValue, "S") == 0)
decDegrees *= -1;
}
else
{
// Get the longitude reference value; used to determine if positive or negative decimal value
ExifEntry * longitudeRef = exif_data_get_entry(exifData, it->first);
exif_entry_get_value(longitudeRef, refValue,2);
if (strcmp(refValue, "W") == 0)
decDegrees *= -1;
}
TskBlackboardAttribute attr(it->second, name(), "", decDegrees);
attrs.push_back(attr);
}
else if (it->first == EXIF_TAG_GPS_SPEED)
{
// Check for the EXIF_IFD_GPS image file directory to avoid interoperability value
ExifIfd ifd = exif_entry_get_ifd(exifEntry);
if (ifd != EXIF_IFD_GPS)
continue;
//Get the GPS speed value
exif_entry_get_value(exifEntry, tag_data, 256);
float speed = getGPSSpeed(tag_data);
char refValue[2];
//Get the GPS speed reference value
ExifEntry * speedRef = exif_data_get_entry(exifData, it->first);
exif_entry_get_value(speedRef, refValue,2);
//Convert Kilometers per hour to meters per second
if (strcmp(refValue, "K") == 0)
{
speed *= 0.277778;
}
//Convert Miles per hour to meters per second
if (strcmp(refValue, "M") == 0)
{
speed *= 0.44704;
}
//Convert Knots to meters per second
if (strcmp(refValue, "N") == 0)
{
speed *= 0.514444;
}
TskBlackboardAttribute attr(it->second, name(), "", speed);
attrs.push_back(attr);
}
else if (it->first == EXIF_TAG_DATE_TIME_ORIGINAL)
{
exif_entry_get_value(exifEntry, tag_data, 256);
datetime = std::string(tag_data);
}
else if(it->first == EXIF_TAG_TIME_ZONE_OFFSET){
exif_entry_get_value(exifEntry, tag_data, 256);
timezone = atoi(tag_data);
}
else
{
// Get the tag's data
exif_entry_get_value(exifEntry, tag_data, 256);
// Add tag data to blackboard
TskBlackboardAttribute attr(it->second, name(), "", tag_data);
attrs.push_back(attr);
}
}
if(!datetime.empty()){
Poco::DateTime parsedDT;
int tzd;
Poco::DateTimeParser::tryParse(datetime, parsedDT, tzd);
if(timezone)
parsedDT.makeUTC(timezone);
else
parsedDT.makeUTC(tzd);
TskBlackboardAttribute attr(TSK_DATETIME, name(), "", (uint64_t)parsedDT.utcTime());
attrs.push_back(attr);
}
if(attrs.size() > 0){
TskBlackboardArtifact art = pFile->createArtifact(TSK_METADATA_EXIF);
for(size_t i = 0; i < attrs.size(); i++){
art.addAttribute(attrs[i]);
}
}
}
