/// <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 <EncodedImage> consumer,
IProducerContext producerContext)
{
IProducerListener listener = producerContext.Listener;
string requestId = producerContext.Id;
ImageRequest imageRequest = producerContext.ImageRequest;
StatefulProducerRunnable <EncodedImage> cancellableProducerRunnable =
new StatefulProducerRunnableImpl <EncodedImage>(
consumer,
listener,
ProducerName,
requestId,
null,
null,
null,
null,
null,
null,
(result) =>
{
EncodedImage.CloseSafely(result);
},
async() =>
{
EncodedImage encodedImage = await GetEncodedImage(imageRequest)
.ConfigureAwait(false);
if (encodedImage == null)
{
return(null);
}
await encodedImage.ParseMetaDataAsync().ConfigureAwait(false);
return(encodedImage);
});
producerContext.AddCallbacks(
new BaseProducerContextCallbacks(
() =>
{
cancellableProducerRunnable.Cancel();
},
() => { },
() => { },
() => { }));
_executor.Execute(cancellableProducerRunnable.Runnable);
}
/// <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 <T> consumer, IProducerContext context)
{
IProducerListener producerListener = context.Listener;
string requestId = context.Id;
StatefulProducerRunnable <T> statefulRunnable = new StatefulProducerRunnableImpl <T>(
consumer,
producerListener,
PRODUCER_NAME,
requestId,
(T ignored) =>
{
producerListener.OnProducerFinishWithSuccess(requestId, PRODUCER_NAME, null);
_inputProducer.ProduceResults(consumer, context);
},
null,
null,
(_) =>
{
return(default(IDictionary <string, string>));
},
(_) =>
{
return(default(IDictionary <string, string>));
},
() =>
{
return(default(IDictionary <string, string>));
},
null,
() =>
{
return(Task.FromResult(default(T)));
});
context.AddCallbacks(
new BaseProducerContextCallbacks(
() =>
{
statefulRunnable.Cancel();
_threadHandoffProducerQueue.Remove(statefulRunnable.Runnable);
},
() => { },
() => { },
() => { }));
_threadHandoffProducerQueue.AddToQueueOrExecute(statefulRunnable.Runnable);
}
/// <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 <EncodedImage> consumer,
IProducerContext producerContext)
{
IProducerListener listener = producerContext.Listener;
string requestId = producerContext.Id;
ImageRequest imageRequest = producerContext.ImageRequest;
StatefulProducerRunnable <EncodedImage> cancellableProducerRunnable =
new StatefulProducerRunnableImpl <EncodedImage>(
consumer,
listener,
PRODUCER_NAME,
requestId,
null,
null,
null,
(result) =>
{
IDictionary <string, string> extraMap = new Dictionary <string, string>()
{
{ CREATED_THUMBNAIL, (result != null).ToString() }
};
return(new ReadOnlyDictionary <string, string>(extraMap));
},
null,
null,
(result) =>
{
EncodedImage.CloseSafely(result);
},
async() =>
{
Uri sourceUri = imageRequest.SourceUri;
StorageFile file = await StorageFile
.GetFileFromApplicationUriAsync(sourceUri)
.AsTask()
.ConfigureAwait(false);
using (var fileStream = await file.OpenReadAsync().AsTask().ConfigureAwait(false))
{
byte[] bytes = await BitmapUtil
.GetThumbnailAsync(fileStream)
.ConfigureAwait(false);
if (bytes != null)
{
IPooledByteBuffer pooledByteBuffer =
_pooledByteBufferFactory.NewByteBuffer(bytes);
return(await BuildEncodedImage(pooledByteBuffer, fileStream)
.ConfigureAwait(false));
}
else
{
return(null);
}
}
});
producerContext.AddCallbacks(
new BaseProducerContextCallbacks(
() =>
{
cancellableProducerRunnable.Cancel();
},
() => { },
() => { },
() => { }));
_executor.Execute(cancellableProducerRunnable.Runnable);
}