public LocalImagesProgressiveDecoder(
DecodeProducer parent,
IConsumer <CloseableReference <CloseableImage> > consumer,
IProducerContext producerContext) : base(
parent,
consumer,
producerContext)
{
}
public NetworkImagesProgressiveDecoder(
DecodeProducer parent,
IConsumer <CloseableReference <CloseableImage> > consumer,
IProducerContext producerContext,
ProgressiveJpegParser progressiveJpegParser,
IProgressiveJpegConfig progressiveJpegConfig) : base(
parent,
consumer,
producerContext)
{
_progressiveJpegParser = Preconditions.CheckNotNull(progressiveJpegParser);
_progressiveJpegConfig = Preconditions.CheckNotNull(progressiveJpegConfig);
_lastScheduledScanNumber = 0;
}
/// <summary>
/// Instantiates the <see cref="ProgressiveDecoder"/>.
/// </summary>
public ProgressiveDecoder(
DecodeProducer parent,
IConsumer <CloseableReference <CloseableImage> > consumer,
IProducerContext producerContext) :
base(consumer)
{
_parent = parent;
_producerContext = producerContext;
_producerListener = producerContext.Listener;
_imageDecodeOptions = producerContext.ImageRequest.ImageDecodeOptions;
_isFinished = false;
Func <EncodedImage, bool, Task> job = (encodedImage, isLast) =>
{
if (encodedImage != null)
{
if (_parent._downsampleEnabled)
{
ImageRequest request = producerContext.ImageRequest;
if (_parent._downsampleEnabledForNetwork ||
!UriUtil.IsNetworkUri(request.SourceUri))
{
encodedImage.SampleSize = DownsampleUtil.DetermineSampleSize(
request, encodedImage);
}
}
return(DoDecode(encodedImage, isLast));
}
return(Task.CompletedTask);
};
_jobScheduler = new JobScheduler(
_parent._executor, job, _imageDecodeOptions.MinDecodeIntervalMs);
_producerContext.AddCallbacks(
new BaseProducerContextCallbacks(
() => { },
() => { },
() =>
{
if (_producerContext.IsIntermediateResultExpected)
{
_jobScheduler.ScheduleJob();
}
},
() => { }));
}