public static void ExecuteTestPipelineStepOperation(string inputDirectory, string BackgroundFilePath, string outputdir, CancellationToken token)
{
var buffer1 = new BlockingCollection <BitmapWithFilePathAndSeq>(BUFFER_SIZE);
var buffer2ForNormalTask1 = new BlockingCollection <BitmapWithFilePathAndSeq>(BUFFER_SIZE);
var buffer2ForThumbnailTask1 = new BlockingCollection <BitmapWithFilePathAndSeq>(BUFFER_SIZE);
var buffer2ForNormalTask2 = new BlockingCollection <BitmapWithFilePathAndSeq>(BUFFER_SIZE);
var buffer2ForThumbnailTask2 = new BlockingCollection <BitmapWithFilePathAndSeq>(BUFFER_SIZE);
var buffer3ForNormal = new BlockingCollection <BitmapWithFilePathAndSeq>(BUFFER_SIZE);
var buffer3ForThumbnail = new BlockingCollection <BitmapWithFilePathAndSeq>(BUFFER_SIZE);
var buffer4 = new BlockingCollection <BitmapWithFilePathAndSeq>(BUFFER_SIZE);
Bitmap background_bm = ImageProcessor.LoadFileAsImage(BackgroundFilePath);
using (CancellationTokenSource cts = CancellationTokenSource.CreateLinkedTokenSource(token))
{
var f = new TaskFactory(TaskCreationOptions.LongRunning, TaskContinuationOptions.None);
List <TaskPipelineStep <BitmapWithFilePathAndSeq> > pipelineSteps = new List <TaskPipelineStep <BitmapWithFilePathAndSeq> >();
// FIRST TASK
var pipelineStep1Task = new PipeLineStep <BitmapWithFilePathAndSeq, BitmapWithFilePathAndSeq>(
null,
(
BlockingCollection <BitmapWithFilePathAndSeq> inputQ,
BlockingCollection <BitmapWithFilePathAndSeq> outputQ,
CancellationToken suspend,
CancellationTokenSource cancel
) => LoadImages(inputDirectory, outputQ, cancel),
cts,
buffer1
).Start();
// SECOND TASK
var pipelineStep2 = new PipeLineStep <BitmapWithFilePathAndSeq, BitmapWithFilePathAndSeq>(
buffer1,
(
BlockingCollection <BitmapWithFilePathAndSeq> inputQ,
BlockingCollection <BitmapWithFilePathAndSeq> outputQ,
CancellationToken suspend,
CancellationTokenSource cancel
) => RemoveBackground(inputQ, background_bm, cts, suspend, outputQ),
cts,
buffer3ForThumbnail,
buffer3ForNormal
);
Task pipelineStep2Task = pipelineStep2.Start();
pipelineSteps.Add(new TaskPipelineStep <BitmapWithFilePathAndSeq>()
{
Name = "Step 2",
PipelineStep = pipelineStep2,
Tasks = new List <Task>()
{
pipelineStep2Task, pipelineStep2.MultiplexorTask
},
Queue = buffer1,
});
// THIRD TASKs
var pipelineStep3 = new PipeLineStep <BitmapWithFilePathAndSeq, BitmapWithFilePathAndSeq>(
buffer3ForThumbnail,
(
BlockingCollection <BitmapWithFilePathAndSeq> inputQ,
BlockingCollection <BitmapWithFilePathAndSeq> outputQ,
CancellationToken suspend,
CancellationTokenSource cancel
) => CreateThumbnail(inputQ, outputQ, cancel),
cts,
buffer4
);
Task pipelineStep3Task = pipelineStep3.Start();
pipelineSteps.Add(new TaskPipelineStep <BitmapWithFilePathAndSeq>()
{
Name = "Step 3",
PipelineStep = pipelineStep3,
Tasks = new List <Task>()
{
pipelineStep3Task, pipelineStep3.MultiplexorTask
},
Queue = buffer3ForThumbnail,
});
var stage3Normal = f.StartNew(() => SaveBitmap(buffer3ForNormal, outputdir, cts));
// FOURTH TASK
var stage4 = f.StartNew(() => SaveThumbnailBitmap(buffer4, outputdir, cts));
try
{
DistributeAvailableTasksAndAwaitPipelineCompletion(new List <Task>()
{
pipelineStep1Task, stage3Normal, stage4
}, pipelineSteps);
}
catch (Exception ex)
{
if (ex is AggregateException ae) // Unwrap aggregate exception.
{
ae.Handle((ie) =>
{
throw ie;
});
}
throw ex;
}
}
}