/// <summary>
/// Start producing results for given context.
/// Provided consumer is notified whenever progress is made
/// (new value is ready or error occurs).
/// </summary>
public void ProduceResults(
IConsumer <CloseableReference <CloseableImage> > consumer,
IProducerContext context)
{
IProducerListener listener = context.Listener;
IPostprocessor postprocessor = context.ImageRequest.Postprocessor;
PostprocessorConsumer basePostprocessorConsumer =
new PostprocessorConsumer(this, consumer, listener, context.Id, postprocessor, context);
IConsumer <CloseableReference <CloseableImage> > postprocessorConsumer;
if (postprocessor.GetType() == typeof(IRepeatedPostprocessor))
{
postprocessorConsumer = new RepeatedPostprocessorConsumer(
basePostprocessorConsumer,
(IRepeatedPostprocessor)postprocessor,
context);
}
else
{
postprocessorConsumer = new SingleUsePostprocessorConsumer(basePostprocessorConsumer);
}
_inputProducer.ProduceResults(postprocessorConsumer, context);
}
internal RepeatedPostprocessorConsumer(
PostprocessorConsumer postprocessorConsumer,
IRepeatedPostprocessor repeatedPostprocessor,
IProducerContext context) :
base(postprocessorConsumer)
{
repeatedPostprocessor.SetCallback(this);
context.AddCallbacks(
new BaseProducerContextCallbacks(
() =>
{
if (Close())
{
Consumer.OnCancellation();
}
},
() => { },
() => { },
() => { }));
}
internal SingleUsePostprocessorConsumer(PostprocessorConsumer postprocessorConsumer) :
base(postprocessorConsumer)
{
}