/// <summary>
/// Called whenever a new value is ready to be retrieved from
/// the IDataSource.
/// </summary>
public override async Task OnNewResultImpl(
IDataSource <CloseableReference <CloseableImage> > dataSource)
{
if (!dataSource.IsFinished())
{
return;
}
CloseableReference <CloseableImage> closeableImageRef = dataSource.GetResult();
SoftwareBitmap bitmap = null;
if (closeableImageRef != null &&
(closeableImageRef.Get().GetType() == typeof(CloseableBitmap) ||
closeableImageRef.Get().GetType() == typeof(CloseableStaticBitmap)))
{
bitmap = ((CloseableBitmap)closeableImageRef.Get()).UnderlyingBitmap;
}
try
{
await OnNewResultImpl(bitmap).ConfigureAwait(false);
}
finally
{
CloseableReference <CloseableImage> .CloseSafely(closeableImageRef);
}
}
public void TestOnBitmapCreated()
{
_platformBitmapFactory.AddBitmapReference(_bitmapReference.Get(), null);
object callerContext = null;
Assert.IsTrue(_cache._otherEntries.TryGetValue(_bitmapReference.Get(), out callerContext));
}
public void TestGet()
{
CloseableReference <byte[]> arrayRef = _array.Get(1);
Assert.AreSame(_array._byteArraySoftRef.Get(), arrayRef.Get());
Assert.AreEqual(4, arrayRef.Get().Length);
Assert.AreEqual(0, _array._semaphore.CurrentCount);
}
/// <summary>
/// Reads one byte.
/// </summary>
public byte Read(int offset)
{
lock (_poolGate)
{
EnsureValid();
Preconditions.CheckArgument(offset >= 0);
Preconditions.CheckArgument(offset < _size);
return(_bufRef.Get().Read(offset));
}
}
public void TestGet_Realloc()
{
CloseableReference <byte[]> arrayRef = _pool.Get(1);
byte[] smallArray = arrayRef.Get();
arrayRef.Dispose();
arrayRef = _pool.Get(7);
Assert.AreEqual(8, arrayRef.Get().Length);
Assert.AreNotSame(smallArray, arrayRef.Get());
}
/// <summary>
/// Writes <code>count</code> bytes from the byte array
/// <code>buffer</code> starting at position <code>offset</code>
/// to this stream.
/// The underlying stream MUST be valid.
/// </summary>
/// <param name="buffer">
/// The source buffer to read from.
/// </param>
/// <param name="offset">
/// The start position in <code>buffer</code> from where to
/// get bytes.
/// </param>
/// <param name="count">
/// The number of bytes from <code>buffer</code> to write to
/// this stream.
/// </param>
/// <exception cref="IOException">
/// If an error occurs while writing to this stream.
/// </exception>
/// <exception cref="ArgumentOutOfRangeException">
/// if <code>offset < 0</code> or <code>count < 0</code>,
/// or if <code>offset + count</code> is bigger than the length
/// of <code>buffer</code>.
/// </exception>
/// <exception cref="InvalidStreamException">
/// If the stream is invalid.
/// </exception>
public override void Write(byte[] buffer, int offset, int count)
{
if (offset < 0 || count < 0 || offset + count > buffer.Length)
{
throw new ArgumentOutOfRangeException(
$"length={ buffer.Length }; regionStart={ offset }; regionLength={ count }");
}
EnsureValid();
Realloc(_count + count);
_bufRef.Get().Write(_count, buffer, offset, count);
_count += count;
}
/// <summary>
/// Instantiates the <see cref="NativePooledByteBuffer"/>.
/// </summary>
public NativePooledByteBuffer(CloseableReference <NativeMemoryChunk> bufRef, int size)
{
Preconditions.CheckNotNull(bufRef);
Preconditions.CheckArgument(size >= 0 && size <= bufRef.Get().Size);
_bufRef = bufRef.Clone();
_size = size;
}
public void TestTrimUnsuccessful()
{
CloseableReference <byte[]> arrayRef = _pool.Get(7);
_delegatePool.Trim(MemoryTrimType.OnCloseToDalvikHeapLimit);
Assert.IsNotNull(arrayRef.Get());
}
public void TestGet()
{
CloseableReference <byte[]> arrayRef = _pool.Get(1);
Assert.AreEqual(0, _delegatePool._freeCounter.NumBytes);
Assert.AreEqual(MIN_BUFFER_SIZE, arrayRef.Get().Length);
}
public void TestConvert()
{
CloseableReference <SoftwareBitmap> reference =
_closeableStaticBitmap.ConvertToBitmapReference();
Assert.AreSame(reference.Get(), _bitmap);
Assert.IsTrue(_closeableStaticBitmap.IsClosed);
}
public void TestTrimUnsuccessful()
{
CloseableReference <byte[]> arrayRef = _array.Get(7);
_array.Trim(MemoryTrimType.OnCloseToDalvikHeapLimit);
Assert.AreSame(arrayRef.Get(), _array._byteArraySoftRef.Get());
Assert.AreEqual(0, _array._semaphore.CurrentCount);
}
public void TestAddBitmapReference()
{
using (CloseableReference <SoftwareBitmap> bitmapReference = _platformBitmapFactory.CreateBitmap(50, 50))
{
Assert.IsNotNull(bitmapReference);
Assert.AreEqual(1, _platformBitmapFactory.AddBitmapReferenceCallCount);
Assert.AreEqual(bitmapReference.Get(), _platformBitmapFactory.Bitmap);
}
}
/// <summary>
/// Creates a new instance of a CloseableStaticBitmap from an existing
/// CloseableReference. The CloseableStaticBitmap will hold a reference
/// to the bitmap until it's closed.
/// </summary>
public CloseableStaticBitmap(
CloseableReference <SoftwareBitmap> bitmapReference,
IQualityInfo qualityInfo,
int rotationAngle)
{
_bitmapReference = Preconditions.CheckNotNull(bitmapReference.CloneOrNull());
_bitmap = _bitmapReference.Get();
_qualityInfo = qualityInfo;
_rotationAngle = rotationAngle;
}
public void getSize(string uriString, IPromise promise)
{
if (string.IsNullOrEmpty(uriString))
{
promise.Reject(ErrorInvalidUri, "Cannot get the size of an image for an empty URI.");
return;
}
var uri = new Uri(uriString);
var imagePipeline = ImagePipelineFactory.Instance.GetImagePipeline();
var request = ImageRequestBuilder.NewBuilderWithSource(uri).Build();
var dataSource = imagePipeline.FetchDecodedImage(request, null);
var dataSubscriber = new BaseDataSubscriberImpl <CloseableReference <CloseableImage> >(
response =>
{
if (!response.IsFinished())
{
return(Task.CompletedTask);
}
CloseableReference <CloseableImage> reference = response.GetResult();
if (reference != null)
{
try
{
CloseableImage image = reference.Get();
promise.Resolve(new JObject
{
{ "width", image.Width },
{ "height", image.Height },
});
}
catch (Exception ex)
{
promise.Reject(ErrorGetSizeFailure, ex.Message);
}
finally
{
CloseableReference <CloseableImage> .CloseSafely(reference);
}
}
else
{
promise.Reject(ErrorGetSizeFailure, Invariant($"Invalid URI '{uri}' provided."));
}
return(Task.CompletedTask);
},
response =>
{
promise.Reject(ErrorGetSizeFailure, response.GetFailureCause());
});
dataSource.Subscribe(dataSubscriber, FBCore.Concurrency.CallerThreadExecutor.Instance);
}
/// <summary>
/// Creates a bitmap of the specified width and height.
/// </summary>
/// <param name="width">The width of the bitmap.</param>
/// <param name="height">The height of the bitmap.</param>
/// <param name="bitmapConfig">
/// The bitmap config used to create the bitmap.
/// </param>
/// <param name="callerContext">
/// The Tag to track who create the bitmap.
/// </param>
/// <returns>A reference to the bitmap.</returns>
/// <exception cref="OutOfMemoryException">
/// If the bitmap cannot be allocated.
/// </exception>
public CloseableReference <SoftwareBitmap> CreateBitmap(
int width,
int height,
BitmapPixelFormat bitmapConfig,
object callerContext)
{
CloseableReference <SoftwareBitmap> reference =
CreateBitmapInternal(width, height, bitmapConfig);
AddBitmapReference(reference.Get(), callerContext);
return(reference);
}
private void DoPostprocessing(
CloseableReference <CloseableImage> sourceImageRef,
bool isLast)
{
Preconditions.CheckArgument(CloseableReference <CloseableImage> .IsValid(sourceImageRef));
if (!ShouldPostprocess(sourceImageRef.Get()))
{
MaybeNotifyOnNewResult(sourceImageRef, isLast);
return;
}
_listener.OnProducerStart(_requestId, NAME);
CloseableReference <CloseableImage> destImageRef = null;
try
{
try
{
destImageRef = PostprocessInternal(sourceImageRef.Get());
}
catch (Exception e)
{
_listener.OnProducerFinishWithFailure(
_requestId, NAME, e, GetExtraMap(_listener, _requestId, _postprocessor));
MaybeNotifyOnFailure(e);
return;
}
_listener.OnProducerFinishWithSuccess(
_requestId, NAME, GetExtraMap(_listener, _requestId, _postprocessor));
MaybeNotifyOnNewResult(destImageRef, isLast);
}
finally
{
CloseableReference <CloseableImage> .CloseSafely(destImageRef);
}
}
private void AssertReferencesSame <T>(
string errorMessage,
CloseableReference <T> expectedRef,
CloseableReference <T> actualRef)
{
if (expectedRef == null)
{
Assert.IsNull(actualRef, errorMessage);
}
else
{
Assert.AreSame(expectedRef.Get(), actualRef.Get(), errorMessage);
}
}
/// <summary>
/// Clients should override this method if the post-processing cannot be
/// done in place. If the post-processing can be done in place, clients
/// should override the
/// Process(byte[], int, int, BitmapPixelFormat, BitmapAlphaMode) method.
///
/// <para />The provided destination bitmap is of the same size as the
/// source bitmap. There are no guarantees on the initial content of the
/// destination bitmap, so the implementation has to make sure that it
/// properly populates it.
///
/// <para />The source bitmap must not be modified as it may be shared
/// by the other clients. The implementation must use the provided
/// destination bitmap as its output.
/// </summary>
/// <param name="destBitmap">
/// The destination bitmap to be used as output.
/// </param>
/// <param name="sourceBitmap">
/// The source bitmap to be used as input.
/// </param>
/// <param name="flexByteArrayPool">
/// The memory pool used for post process.
/// </param>
public unsafe virtual void Process(
SoftwareBitmap destBitmap,
SoftwareBitmap sourceBitmap,
FlexByteArrayPool flexByteArrayPool)
{
Preconditions.CheckArgument(sourceBitmap.BitmapPixelFormat == destBitmap.BitmapPixelFormat);
Preconditions.CheckArgument(!destBitmap.IsReadOnly);
Preconditions.CheckArgument(destBitmap.PixelWidth == sourceBitmap.PixelWidth);
Preconditions.CheckArgument(destBitmap.PixelHeight == sourceBitmap.PixelHeight);
sourceBitmap.CopyTo(destBitmap);
using (var buffer = destBitmap.LockBuffer(BitmapBufferAccessMode.Write))
using (var reference = buffer.CreateReference())
{
// Get input data
byte *srcData;
uint capacity;
((IMemoryBufferByteAccess)reference).GetBuffer(out srcData, out capacity);
// Allocate temp buffer for processing
byte[] desData = default(byte[]);
CloseableReference <byte[]> bytesArrayRef = default(CloseableReference <byte[]>);
try
{
bytesArrayRef = flexByteArrayPool.Get((int)capacity);
desData = bytesArrayRef.Get();
}
catch (Exception)
{
// Allocates the byte array since the pool couldn't provide one
desData = new byte[capacity];
}
try
{
// Process output data
Marshal.Copy((IntPtr)srcData, desData, 0, (int)capacity);
Process(desData, destBitmap.PixelWidth, destBitmap.PixelHeight,
destBitmap.BitmapPixelFormat, destBitmap.BitmapAlphaMode);
Marshal.Copy(desData, 0, (IntPtr)srcData, (int)capacity);
}
finally
{
CloseableReference <byte[]> .CloseSafely(bytesArrayRef);
}
}
}
public void TestFetchDecodedImageSuccess()
{
var completion = new ManualResetEvent(false);
var dataSource = _imagePipeline.FetchDecodedImage(ImageRequest.FromUri(IMAGE_URL), null);
var dataSubscriber = new BaseDataSubscriberImpl <CloseableReference <CloseableImage> >(
async response =>
{
CloseableReference <CloseableImage> reference = response.GetResult();
if (reference != null)
{
SoftwareBitmap bitmap = ((CloseableBitmap)reference.Get()).UnderlyingBitmap;
try
{
Assert.IsTrue(bitmap.PixelWidth != 0);
Assert.IsTrue(bitmap.PixelHeight != 0);
Assert.IsTrue(_imagePipeline.IsInBitmapMemoryCache(ImageRequest.FromUri(IMAGE_URL)));
Assert.IsTrue(await _imagePipeline.IsInDiskCacheAsync(IMAGE_URL).ConfigureAwait(false));
}
catch (Exception)
{
Assert.Fail();
}
finally
{
CloseableReference <CloseableImage> .CloseSafely(reference);
completion.Set();
}
}
else
{
Assert.Fail();
completion.Set();
}
},
response =>
{
Assert.Fail();
completion.Set();
});
dataSource.Subscribe(dataSubscriber, CallerThreadExecutor.Instance);
completion.WaitOne();
}
public void TestFetchEncodedImageSuccess()
{
var completion = new ManualResetEvent(false);
var dataSource = _imagePipeline.FetchEncodedImage(ImageRequest.FromUri(IMAGE_URL), null);
var dataSubscriber = new BaseDataSubscriberImpl <CloseableReference <IPooledByteBuffer> >(
async response =>
{
CloseableReference <IPooledByteBuffer> reference = response.GetResult();
if (reference != null)
{
IPooledByteBuffer inputStream = reference.Get();
try
{
Assert.IsTrue(inputStream.Size != 0);
Assert.IsTrue(await _imagePipeline.IsInDiskCacheAsync(IMAGE_URL).ConfigureAwait(false));
}
catch (Exception)
{
Assert.Fail();
}
finally
{
CloseableReference <IPooledByteBuffer> .CloseSafely(reference);
completion.Set();
}
}
else
{
Assert.Fail();
completion.Set();
}
},
response =>
{
Assert.Fail();
completion.Set();
});
dataSource.Subscribe(dataSubscriber, CallerThreadExecutor.Instance);
completion.WaitOne();
}
/// <summary>
/// Removes key-value from the StagingArea. Both key and value must match.
/// </summary>
/// <param name="key">The cache key.</param>
/// <param name="encodedImage">Value corresponding to key.</param>
/// <returns>true if item was removed.</returns>
public bool Remove(ICacheKey key, EncodedImage encodedImage)
{
lock (_mapGate)
{
Preconditions.CheckNotNull(key);
Preconditions.CheckNotNull(encodedImage);
Preconditions.CheckArgument(EncodedImage.IsValid(encodedImage));
EncodedImage oldValue = default(EncodedImage);
if (!_map.TryGetValue(key, out oldValue))
{
return(false);
}
CloseableReference <IPooledByteBuffer> oldReference = oldValue.GetByteBufferRef();
CloseableReference <IPooledByteBuffer> reference = encodedImage.GetByteBufferRef();
try
{
if (oldReference == null || reference == null || oldReference.Get() != reference.Get())
{
return(false);
}
_map.Remove(key);
}
finally
{
CloseableReference <IPooledByteBuffer> .CloseSafely(reference);
CloseableReference <IPooledByteBuffer> .CloseSafely(oldReference);
EncodedImage.CloseSafely(oldValue);
}
#if DEBUG_STAGING_AREA
LogStats();
#endif // DEBUG_STAGING_AREA
return(true);
}
}
/// <summary>
/// Returns true if the image is a JPEG and its data is already complete
/// at the specified length, false otherwise.
/// </summary>
public bool IsCompleteAt(int length)
{
if (Format != ImageFormat.JPEG)
{
return(true);
}
// If the image is backed by FileStream return true since they will
// always be complete.
if (_inputStreamSupplier != null)
{
return(true);
}
// The image should be backed by a ByteBuffer
Preconditions.CheckNotNull(_pooledByteBufferRef);
IPooledByteBuffer buf = _pooledByteBufferRef.Get();
return((buf.Read(length - 2) == JfifUtil.MARKER_FIRST_BYTE) &&
(buf.Read(length - 1) == JfifUtil.MARKER_EOI));
}
/// <summary>
/// Clients should override this method only if the post-processed
/// bitmap has to be of a different size than the source bitmap.
/// If the post-processed bitmap is of the same size, clients should
/// override one of the other two methods.
///
/// <para />The source bitmap must not be modified as it may be shared
/// by the other clients. The implementation must create a new bitmap
/// that is safe to be modified and return a reference to it.
/// Clients should use <code>bitmapFactory</code> to create a new bitmap.
/// </summary>
/// <param name="sourceBitmap">The source bitmap.</param>
/// <param name="bitmapFactory">
/// The factory to create a destination bitmap.
/// </param>
/// <param name="flexByteArrayPool">
/// The memory pool used for post process.
/// </param>
/// <returns>
/// A reference to the newly created bitmap.
/// </returns>
public CloseableReference <SoftwareBitmap> Process(
SoftwareBitmap sourceBitmap,
PlatformBitmapFactory bitmapFactory,
FlexByteArrayPool flexByteArrayPool)
{
CloseableReference <SoftwareBitmap> destBitmapRef =
bitmapFactory.CreateBitmapInternal(
sourceBitmap.PixelWidth,
sourceBitmap.PixelHeight,
sourceBitmap.BitmapPixelFormat);
try
{
Process(destBitmapRef.Get(), sourceBitmap, flexByteArrayPool);
return(CloseableReference <SoftwareBitmap> .CloneOrNull(destBitmapRef));
}
finally
{
CloseableReference <SoftwareBitmap> .CloseSafely(destBitmapRef);
}
}
/// <summary>
/// Caches the given key-value pair.
///
/// <para />Important: the client should use the returned reference
/// instead of the original one. It is the caller's responsibility
/// to close the returned reference once not needed anymore.
/// </summary>
/// <returns>
/// The new reference to be used, null if the value cannot be cached.
/// </returns>
public CloseableReference <V> Cache(
K key,
CloseableReference <V> valueRef,
IEntryStateObserver <K> observer)
{
Preconditions.CheckNotNull(key);
Preconditions.CheckNotNull(valueRef);
MaybeUpdateCacheParams();
Entry oldExclusive;
CloseableReference <V> oldRefToClose = null;
CloseableReference <V> clientRef = null;
lock (_cacheGate)
{
// Remove the old item (if any) as it is stale now
oldExclusive = _exclusiveEntries.Remove(key);
Entry oldEntry = _cachedEntries.Remove(key);
if (oldEntry != null)
{
MakeOrphan(oldEntry);
oldRefToClose = ReferenceToClose(oldEntry);
}
if (CanCacheNewValue(valueRef.Get()))
{
Entry newEntry = Entry.of(key, valueRef, observer);
_cachedEntries.Put(key, newEntry);
clientRef = NewClientReference(newEntry);
}
}
CloseableReference <V> .CloseSafely(oldRefToClose);
MaybeNotifyExclusiveEntryRemoval(oldExclusive);
MaybeEvictEntries();
return(clientRef);
}
/// <summary>
/// Returns a stream from the internal stream supplier if it's not null.
/// Otherwise returns an stream for the internal buffer reference if
/// valid and null otherwise.
///
/// <para />The caller has to close the stream after using it.
/// </summary>
public Stream GetInputStream()
{
if (_inputStreamSupplier != null)
{
return(_inputStreamSupplier.Get());
}
CloseableReference <IPooledByteBuffer> pooledByteBufferRef =
CloseableReference <IPooledByteBuffer> .CloneOrNull(_pooledByteBufferRef);
if (pooledByteBufferRef != null)
{
try
{
return(new PooledByteBufferInputStream(pooledByteBufferRef.Get()));
}
finally
{
CloseableReference <IPooledByteBuffer> .CloseSafely(pooledByteBufferRef);
}
}
return(null);
}
/// <summary>
/// Fetches the encoded BitmapImage.
/// </summary>
/// <param name="uri">The image uri.</param>
/// <param name="token">The cancellation token.</param>
/// <param name="dispatcher">
/// The current view's dispatcher, used to create BitmapImage.
/// </param>
/// <returns>The encoded BitmapImage.</returns>
/// <exception cref="IOException">
/// If the image uri can't be found.
/// </exception>
public Task <BitmapImage> FetchEncodedBitmapImageAsync(
Uri uri,
CancellationToken token = default(CancellationToken),
CoreDispatcher dispatcher = null)
{
var taskCompletionSource = new TaskCompletionSource <BitmapImage>();
var dataSource = FetchEncodedImage(ImageRequest.FromUri(uri), null);
var dataSubscriber = new BaseDataSubscriberImpl <CloseableReference <IPooledByteBuffer> >(
async response =>
{
CloseableReference <IPooledByteBuffer> reference = response.GetResult();
if (reference != null)
{
//----------------------------------------------------------------------
// Phong Cao: InMemoryRandomAccessStream can't write anything < 16KB.
// http://stackoverflow.com/questions/25928408/inmemoryrandomaccessstream-incorrect-behavior
//----------------------------------------------------------------------
IPooledByteBuffer inputStream = reference.Get();
int supportedSize = Math.Max(16 * ByteConstants.KB, inputStream.Size);
// Allocate temp buffer for stream convert
byte[] bytesArray = default(byte[]);
CloseableReference <byte[]> bytesArrayRef = default(CloseableReference <byte[]>);
try
{
bytesArrayRef = _flexByteArrayPool.Get(supportedSize);
bytesArray = bytesArrayRef.Get();
}
catch (Exception)
{
// Allocates the byte array since the pool couldn't provide one
bytesArray = new byte[supportedSize];
}
try
{
inputStream.Read(0, bytesArray, 0, inputStream.Size);
await DispatcherHelpers.CallOnDispatcherAsync(async() =>
{
using (var outStream = new InMemoryRandomAccessStream())
using (var writeStream = outStream.AsStreamForWrite())
{
await writeStream.WriteAsync(bytesArray, 0, supportedSize);
outStream.Seek(0);
BitmapImage bitmapImage = new BitmapImage();
await bitmapImage.SetSourceAsync(outStream).AsTask().ConfigureAwait(false);
taskCompletionSource.SetResult(bitmapImage);
}
},
dispatcher).ConfigureAwait(false);
}
catch (Exception e)
{
taskCompletionSource.SetException(e);
}
finally
{
CloseableReference <IPooledByteBuffer> .CloseSafely(reference);
CloseableReference <byte[]> .CloseSafely(bytesArrayRef);
}
}
else
{
taskCompletionSource.SetResult(null);
}
},
response =>
{
taskCompletionSource.SetException(response.GetFailureCause());
});
dataSource.Subscribe(dataSubscriber, _handleResultExecutor);
token.Register(() =>
{
dataSource.Close();
taskCompletionSource.TrySetCanceled();
});
return(taskCompletionSource.Task);
}
/// <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 producerContext)
{
IProducerListener listener = producerContext.Listener;
string requestId = producerContext.Id;
listener.OnProducerStart(requestId, ProducerName);
ImageRequest imageRequest = producerContext.ImageRequest;
object callerContext = producerContext.CallerContext;
ICacheKey cacheKey = _cacheKeyFactory.GetBitmapCacheKey(imageRequest, callerContext);
IDictionary <string, string> extraMap = default(IDictionary <string, string>);
CloseableReference <CloseableImage> cachedReference = _memoryCache.Get(cacheKey);
if (cachedReference != null)
{
bool isFinal = cachedReference.Get().QualityInfo.IsOfFullQuality;
if (isFinal)
{
extraMap = new Dictionary <string, string>()
{
{ VALUE_FOUND, "true" }
};
listener.OnProducerFinishWithSuccess(
requestId,
ProducerName,
listener.RequiresExtraMap(requestId) ?
new ReadOnlyDictionary <string, string>(extraMap) :
null);
consumer.OnProgressUpdate(1f);
}
consumer.OnNewResult(cachedReference, isFinal);
cachedReference.Dispose();
if (isFinal)
{
return;
}
}
if (producerContext.LowestPermittedRequestLevel >= RequestLevel.BITMAP_MEMORY_CACHE)
{
extraMap = new Dictionary <string, string>()
{
{ VALUE_FOUND, "false" }
};
listener.OnProducerFinishWithSuccess(
requestId,
ProducerName,
listener.RequiresExtraMap(requestId) ?
new ReadOnlyDictionary <string, string>(extraMap) :
null);
consumer.OnNewResult(null, true);
return;
}
extraMap = new Dictionary <string, string>()
{
{ VALUE_FOUND, "false" }
};
IConsumer <CloseableReference <CloseableImage> > wrappedConsumer =
WrapConsumer(consumer, cacheKey);
listener.OnProducerFinishWithSuccess(
requestId,
ProducerName,
listener.RequiresExtraMap(requestId) ?
new ReadOnlyDictionary <string, string>(extraMap) :
null);
_inputProducer.ProduceResults(wrappedConsumer, producerContext);
}
protected override void OnNewResultImpl(
CloseableReference <CloseableImage> newResult,
bool isLast)
{
// Ignore invalid intermediate results and forward the null result if last
if (newResult == null)
{
if (isLast)
{
Consumer.OnNewResult(null, true);
}
return;
}
// Stateful results cannot be cached and are just forwarded
if (newResult.Get().Stateful)
{
Consumer.OnNewResult(newResult, isLast);
return;
}
// If the intermediate result is not of a better quality than the cached
// result, forward the already cached result and don't cache the new result.
if (!isLast)
{
CloseableReference <CloseableImage> currentCachedResult = _memoryCache.Get(_cacheKey);
if (currentCachedResult != null)
{
try
{
IQualityInfo newInfo = newResult.Get().QualityInfo;
IQualityInfo cachedInfo = currentCachedResult.Get().QualityInfo;
if (cachedInfo.IsOfFullQuality || cachedInfo.Quality >= newInfo.Quality)
{
Consumer.OnNewResult(currentCachedResult, false);
return;
}
}
finally
{
CloseableReference <CloseableImage> .CloseSafely(currentCachedResult);
}
}
}
// Cache and forward the new result
CloseableReference <CloseableImage> newCachedResult =
_memoryCache.Cache(_cacheKey, newResult);
try
{
if (isLast)
{
Consumer.OnProgressUpdate(1f);
}
Consumer.OnNewResult(
(newCachedResult != null) ? newCachedResult : newResult, isLast);
}
finally
{
CloseableReference <CloseableImage> .CloseSafely(newCachedResult);
}
}