public Task StartTakePicture(int intervalMSec, CancellationTokenSource cancelTokenSource)
{
if (string.IsNullOrEmpty(photoFileNamePrefix))
{
var css = ConnectionString.Split(";");
var devdef = css[1].Split("=");
photoFileNamePrefix = devdef[1];
}
lock (this) {
takePhotoIntervalMSec = intervalMSec;
}
var tmpFileName = photoFileName + photoFileNameExt;
var photoTakingTask = Task.Factory.StartNew(async() => {
var capture = OpenCvSharp.VideoCapture.FromCamera(0);
using (var win = new OpenCvSharp.Window())
using (var mat = new OpenCvSharp.Mat()) {
while (true)
{
capture.Read(mat);
win.ShowImage(mat);
var now = DateTime.Now;
if (File.Exists(tmpFileName))
{
File.Delete(tmpFileName);
}
using (var fs = new FileStream(tmpFileName, FileMode.CreateNew)) {
mat.WriteToStream(fs, photoFileNameExt, null);
}
var fileName = photoFileNamePrefix + now.ToString("yyyyMMddHHmmss") + photoFileNameExt;
await UploadFile(fileName, new FileInfo(tmpFileName).FullName);
var interval = 0;
lock (this) {
interval = takePhotoIntervalMSec;
}
await Task.Delay(interval);
if (cancelTokenSource.IsCancellationRequested)
{
break;
}
}
throw new OperationCanceledException(cancelTokenSource.Token);
}
}, cancelTokenSource.Token);
return(photoTakingTask);
}