public async Task <Dictionary <string, Record> > writeGeoTag(Dictionary <string, Record> recordDict, BlockingCollection <string> fileQueue, string inPath, string outPath)
{
int mQueueSize = fileQueue.Count;
progressForm = new ProgressForm("Writing geotags to photos...");
string[] _files = Directory.GetFiles(inPath);
progressForm.Show();
progressForm.BringToFront();
progressForm.cancel += cancelImport;
cts = new CancellationTokenSource();
var token = cts.Token;
var progressHandler1 = new Progress <int>(value =>
{
progressForm.ProgressValue = value;
progressForm.Message = "Geotagging, please wait... " + value.ToString() + "% completed\n" +
geoTagCount + " of " + mQueueSize + " photos geotagged\n" +
"Photos with no geomark: " + stationaryCount + "\n" + "Photos with no gps point: " + errorCount + "\n";
});
var progressValue = progressHandler1 as IProgress <int>;
geoTagCount = 0;
errorCount = 0;
stationaryCount = 0;
Dictionary <string, Record> newRecordDict = new Dictionary <string, Record>();
int processors = Environment.ProcessorCount;
int minWorkerThreads = processors;
int minIOThreads = processors;
int maxWorkerThreads = processors;
int maxIOThreads = processors;
//ThreadPool.SetMinThreads(minWorkerThreads, minIOThreads);
ThreadPool.SetMaxThreads(maxWorkerThreads, maxIOThreads);
await Task.Factory.StartNew(() =>
{
try
{
while (fileQueue.Count != 0)
{
if (token.IsCancellationRequested)
{
token.ThrowIfCancellationRequested();
}
Parallel.Invoke(
() =>
{
ThreadInfo threadInfo = new ThreadInfo();
threadInfo.OutPath = outPath;
threadInfo.Length = mQueueSize;
threadInfo.ProgressHandler = progressHandler1;
threadInfo.File = fileQueue.Take();
try
{
Record r = recordDict[Path.GetFileNameWithoutExtension(threadInfo.File)];
threadInfo.Record = r;
if (r.GeoMark)
{
Record newRecord = null;
newRecord = ProcessFile(threadInfo).Result;
newRecordDict.Add(r.PhotoName, r);
}
else
{
object a = "nogps";
incrementGeoTagError(a);
}
}
catch (KeyNotFoundException ex)
{
object a = "nokey";
incrementGeoTagError(a);
}
});
}
}
catch (OperationCanceledException)
{
cts.Dispose();
}
}, cts.Token);
progressForm.Invoke(
new MethodInvoker(() => progressValue.Report(100)
));
progressForm.enableOK();
progressForm.disableCancel();
return(newRecordDict);
}
private Record readData(ThreadInfo threadInfo)
{
string outPath = threadInfo.OutPath;
int length = threadInfo.Length;
string file = Path.GetFullPath(threadInfo.File);
string photo = file;
Image image = new Bitmap(file);
Record r = new Record(photo);
var progressValue = threadInfo.ProgressHandler as IProgress <int>;
lock (obj)
{
id++;
}
PropertyItem[] propItems = image.PropertyItems;
PropertyItem propItemLatRef = image.GetPropertyItem(0x0001);
PropertyItem propItemLat = image.GetPropertyItem(0x0002);
PropertyItem propItemLonRef = image.GetPropertyItem(0x0003);
PropertyItem propItemLon = image.GetPropertyItem(0x0004);
PropertyItem propItemAltRef = image.GetPropertyItem(0x0005);
PropertyItem propItemAlt = image.GetPropertyItem(0x0006);
PropertyItem propItemDateTime = image.GetPropertyItem(0x0132);
image.Dispose();
byte[] latBytes = propItemLat.Value;
byte[] latRefBytes = propItemLatRef.Value;
byte[] lonBytes = propItemLon.Value;
byte[] lonRefBytes = propItemLonRef.Value;
byte[] altRefBytes = propItemAltRef.Value;
byte[] altBytes = propItemAlt.Value;
byte[] dateTimeBytes = propItemDateTime.Value;
string latitudeRef = ASCIIEncoding.UTF8.GetString(latRefBytes);
string longitudeRef = ASCIIEncoding.UTF8.GetString(lonRefBytes);
string altRef = ASCIIEncoding.UTF8.GetString(altRefBytes);
double latitude = byteToDegrees(latBytes);
double longitude = byteToDegrees(lonBytes);
double altitude = byteToDecimal(altBytes);
DateTime dateTime = byteToDate(dateTimeBytes);
if (latitudeRef.Equals("S\0"))
{
latitude = -latitude;
}
if (longitudeRef.Equals("W\0"))
{
longitude = -longitude;
}
if (!altRef.Equals("\0"))
{
altitude = -altitude;
}
r.Latitude = latitude;
r.Longitude = longitude;
r.Altitude = altitude;
r.TimeStamp = dateTime;
r.Path = Path.GetFullPath(file);
r.Id = id.ToString();
lock (obj)
{
addRecord(photo, r);
geoTagCount++;
setMinMax(latitude, longitude);
double percent = ((double)geoTagCount / length) * 100;
int percentInt = (int)(Math.Round(percent));
if (progressValue != null)
{
progressValue = threadInfo.ProgressHandler;
progressForm.Invoke(
new MethodInvoker(() => progressValue.Report(percentInt)
));
}
}
return(r);
}