public EventListViewModel(IConcurrencyService concurrencyService)
{
var eventsCollection = new ObservableCollectionExtended <EventItem>();
Events = new ReadOnlyObservableCollection <EventItem>(eventsCollection);
var selectionChangeSubject = new Subject <Func <Selection, Selection> >();
mSubmitSelectionChange = selectionChangeSubject.OnNext;
WhenEventSelectionChanges = selectionChangeSubject
.ObserveOn(concurrencyService.TaskPoolRxScheduler);
this.WhenActivated((CompositeDisposable disposables) =>
{
var whenIncludeInputsChanges =
IncludeInputObservables
?.ObserveOn(concurrencyService.TaskPoolRxScheduler)
.DistinctUntilChanged()
?? Observable.Return(false);
var eventsProcessedUntilInvalid =
whenIncludeInputsChanges.Publish(whenIncludeInputsChangesPub =>
whenIncludeInputsChangesPub.SelectMany(includeInputs =>
Observables
.ObserveOn(concurrencyService.TaskPoolRxScheduler)
.Replay(observablesPub =>
{
var observablesExpanded =
observablesPub
.MergeMany(obs => Observable.Return(obs))
.ExpandDistinct(obs => includeInputs ? obs.Inputs : Observable.Empty <IObservableInstance>());
var events = observablesExpanded
.SelectMany(obs => Observable.Return(EventItem.FromObservableInstance(obs))
.Concat(obs.Subscriptions.SelectMany(sub => sub.Events.Select(e => EventItem.FromStreamEvent(sub, e)))))
.Merge(ClientEvents?.Select(EventItem.FromClientEvent) ?? Observable.Empty <EventItem>());
var eventsProcessed = events
.ToObservableChangeSet(e => e.SequenceId)
.Filter(SequenceIdRange?.Select(CreateFilter) ?? Observable.Return <Func <EventItem, bool> >(_ => true))
.Batch(TimeSpan.FromMilliseconds(100))
.Sort(Utility.Comparer <EventItem> .ByKey(e => e.SequenceId));
// Terminate the stream if an observable is removed or the include inputs
// flag changes, as in both cases we need to rebuild the output from scratch.
return(eventsProcessed
.TakeUntil(observablesPub.Where(chg => chg.Removes > 0))
.TakeUntil(whenIncludeInputsChangesPub.Where(ii => ii != includeInputs)));
}))
)
.SubscribeOn(concurrencyService.TaskPoolRxScheduler);
Observable.Defer(() =>
{
eventsCollection.Clear();
return(eventsProcessedUntilInvalid
.ObserveOn(concurrencyService.DispatcherRxScheduler)
.Bind(eventsCollection, new SortedObservableCollectionAdaptor <EventItem, long>(int.MaxValue)));
})
.SubscribeOn(concurrencyService.DispatcherRxScheduler)
.Repeat()
.Subscribe()
.DisposeWith(disposables);
});
Func <EventItem, bool> CreateFilter((long start, long end) range)
{
return(e => e.SequenceId >= range.start && e.SequenceId <= range.end);
}
}
public override IObservable <Mat> Generate()
{
return(Observable.Defer(() => Observable.Return(CreateBuffer())));
}
public override IObservable <Normal> Generate()
{
return(Observable.Defer(() => Observable.Return(new Normal(Mean, StdDev))));
}
IObservable <UserAndScopes> GetUserFromApi()
{
return(Observable.Defer(() => ApiClient.GetUser()));
}
public void CombineShouldActuallyPerformCombination()
{
var sub = new Subject <int>();
var subCount = 0;
var unsubCount = 0;
var source = Observable.Defer(() =>
{
Interlocked.Increment(ref subCount);
return(sub.AsObservable().Finally(() => { Interlocked.Increment(ref unsubCount); }));
});
Func <long, IObservable <int> > sourceFactory = x => source.Where(i => i <= x);
long Aggregate(long acc, long next) => Math.Max(acc, next);
var c = sourceFactory.CombinedSubscriptions(Aggregate, -1L);
var c0 = c(0);
var l0 = new List <int>();
var c3 = c(3);
var l3 = new List <int>();
subCount.Should().Be(0);
unsubCount.Should().Be(0);
using (c0.Subscribe(x => l0.Add(x)))
{
subCount.Should().Be(1);
unsubCount.Should().Be(0);
sub.OnNext(0);
l0.Should().BeEquivalentTo(new[] { 0 });
sub.OnNext(1);
l0.Should().BeEquivalentTo(new[] { 0 });
using (c3.Subscribe(x => l3.Add(x)))
{
subCount.Should().Be(2);
unsubCount.Should().Be(1);
sub.OnNext(3);
l0.Should().BeEquivalentTo(new[] { 0, 3 });
l3.Should().BeEquivalentTo(new[] { 3 });
sub.OnNext(4);
l0.Should().BeEquivalentTo(new[] { 0, 3 });
l3.Should().BeEquivalentTo(new[] { 3 });
// Resubscribing with same key should have no effect
using (c3.Subscribe(x => { }))
{
subCount.Should().Be(2);
unsubCount.Should().Be(1);
// Resubscribing with another key to the same aggregate
using (c0.Subscribe(x => { }))
{
subCount.Should().Be(2);
unsubCount.Should().Be(1);
}
}
subCount.Should().Be(2);
unsubCount.Should().Be(1);
}
subCount.Should().Be(3);
unsubCount.Should().Be(2);
sub.OnNext(3);
l0.Should().BeEquivalentTo(new[] { 0, 3 });
l3.Should().BeEquivalentTo(new[] { 3 });
}
subCount.Should().Be(3);
unsubCount.Should().Be(3);
}
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
var baseDir = Path.Combine(Application.ApplicationInfo.DataDir, "image_cache");
if (!Directory.Exists(baseDir))
{
Directory.CreateDirectory(baseDir);
}
var from = new string [] { "Text", "Name", "Icon" };
var to = new int [] { Resource.Id.textMessage, Resource.Id.textName, Resource.Id.iconView };
var data = new List <IDictionary <string, object> > ();
data.Add(new JavaDictionary <string, object> ()
{
{ "Text", "loading" }, { "Name", "" }
});
var urls = new Dictionary <Uri, List <string> > ();
var getUrl = new Uri("https://api.github.com/repos/mono/mono/commits");
#if REACTIVE
var hr = new HttpWebRequest(getUrl);
var req = Observable.FromAsyncPattern <WebResponse> (hr.BeginGetResponse, hr.EndGetResponse);
Observable.Defer(req).Subscribe(v => {
var v = hr.GetResponse();
var json = (IEnumerable <JsonValue>)JsonValue.Load(v.GetResponseStream());
#else
var wc = new WebClient();
wc.Headers ["USER-AGENT"] = "Xamarin Android sample HTTP client";
wc.DownloadStringCompleted += (sender, e) => {
data.Clear();
var v = e.Result;
var json = (IEnumerable <JsonValue>)JsonValue.Parse(v);
#endif
#if REACTIVE
json.ToObservable().Select(j => j.AsDynamic()).Subscribe(jitem => {
#else
foreach (var item in json.Select(j => j.AsDynamic()))
{
#endif
var uri = new Uri(((string)item.author.avatar_url) ?? "http://www.gravatar.com/avatar/default.jpg");
var file = Path.Combine(baseDir, (string)item.author.id + new FileInfo(uri.LocalPath).Extension);
if (!urls.ContainsKey(uri))
{
urls.Add(uri, new List <string> ()
{
file
});
}
else
{
urls [uri].Add(file);
}
data.Add(new JavaDictionary <string, object> ()
{
{ "Text", item.commit.message }, { "Name", item.author.login }, { "Icon", Path.Combine(baseDir, file) }
});
#if REACTIVE
});
#else
}
#endif
urls.ToList().ForEach(p => {
var iwc = new WebClient();
iwc.DownloadDataCompleted += (isender, ie) => p.Value.ForEach(s => {
using (var fs = File.Create(s))
if (ie.Result != null)
{
fs.Write(ie.Result, 0, ie.Result.Length);
}
});
iwc.DownloadDataAsync(p.Key);
});
this.RunOnUiThread(() => {
ListAdapter = new SimpleAdapter(this, data, Resource.Layout.ListItem, from, to);
});
#if REACTIVE
});
#else
};
public override IObservable <Point2d> Generate()
{
return(Observable.Defer(() => Observable.Return(new Point2d(X, Y))));
}
private IObservable <Unit> ActionAnimations(CharacterAction[] actions)
{
if (!actions.Any())
{
return(Observable.ReturnUnit());
}
var actionList = new List <IObservable <Unit> >();
foreach (var action in actions)
{
//攻撃
var attackAction = action as CharacterAttackAction;
if (attackAction != null)
{
actionList.Add(AttackAnimation(attackAction));
continue;
}
//拾う
var pickupAction = action as CharacterItemPickupAction;
if (pickupAction != null)
{
actionList.Add(Observable.Defer(() =>
{
if (pickupAction.IsSuccess)
{
StaticData.Message.ShowMessage(string.Format("{0}を拾った", pickupAction.TargetItem.Name), false);
}
else
{
StaticData.Message.ShowMessage(string.Format("持ち物がいっぱいで{0}を拾えなかった", pickupAction.TargetItem.Name), false);
}
return(Observable.ReturnUnit());
}));
continue;
}
//置く
var putAction = action as CharacterItemPutAction;
if (putAction != null)
{
actionList.Add(Observable.Defer(() =>
{
if (putAction.IsSuccess)
{
StaticData.Message.ShowMessage(string.Format("{0}を置いた", putAction.TargetItem.Name), false);
}
else
{
StaticData.Message.ShowMessage(string.Format("ここには置けない"), false);
}
return(Observable.ReturnUnit());
}));
continue;
}
//投げる
var throwAction = action as CharacterThrowAction;
if (throwAction != null)
{
actionList.Add(ThrowAnimation(throwAction));
continue;
}
//飲む
var drinkAction = action as CharacterDrinkPotionAction;
if (drinkAction != null)
{
actionList.Add(Observable.Defer(() =>
{
StaticData.Message.ShowMessage(string.Format("{0}を飲んだ", drinkAction.TargetItem.Name), false);
return(Observable.ReturnUnit());
})
.SelectMany(ActionAnimations(drinkAction.SubActions.ToArray()))
.Last());
continue;
}
//メッセージ
var messageAction = action as MessageAction;
if (messageAction != null)
{
actionList.Add(Observable.Defer(() =>
{
StaticData.Message.ShowMessage(messageAction.Message, messageAction.IsWait);
return(Observable.ReturnUnit());
}));
continue;
}
//該当なし
actionList.Add(Observable.ReturnUnit());
}
return(actionList.Concat().Last());
}
public override IObservable <Mat> Process(IObservable <Mat> source)
{
return(Observable.Defer(() =>
{
int rows = 0;
double[] data = null;
double[] feedforwardCoefficients = null;
double[] feedbackCoefficients = null;
double[] dataWeights = null;
double[] dataMemory = null;
double[] outputWeights = null;
double[] outputMemory = null;
return source.Select(input =>
{
if (FeedforwardCoefficients != feedforwardCoefficients ||
FeedbackCoefficients != feedbackCoefficients ||
rows != input.Rows ||
data != null && data.Length != rows * input.Cols)
{
rows = input.Rows;
feedforwardCoefficients = FeedforwardCoefficients;
feedbackCoefficients = FeedbackCoefficients;
dataWeights = InitializeWeights(feedforwardCoefficients);
outputWeights = InitializeWeights(feedbackCoefficients);
for (int i = 0; i < outputWeights.Length - 1; i++)
{
outputWeights[i] = -outputWeights[i];
}
if (dataWeights != IdentityWeight || outputWeights != IdentityWeight)
{
data = new double[rows * input.Cols];
dataMemory = new double[rows * (dataWeights.Length - 1)];
outputMemory = new double[rows * (outputWeights.Length - 1)];
}
}
if (dataWeights == IdentityWeight && outputWeights == IdentityWeight)
{
return input;
}
else
{
var dataHandle = GCHandle.Alloc(data, GCHandleType.Pinned);
try
{
var output = new Mat(input.Size, input.Depth, input.Channels);
using (var dataHeader = new Mat(input.Size, Depth.F64, 1, dataHandle.AddrOfPinnedObject()))
{
CV.Convert(input, dataHeader);
ProcessData(rows, data, dataWeights, dataMemory, outputWeights, outputMemory);
CV.Convert(dataHeader, output);
}
return output;
}
finally { dataHandle.Free(); }
}
});
}));
}
public IObservable <Unit> Load()
{
return(Observable.Defer(() => Observable.Start(() => Settings.Default.Reload())));
}
public static IObservable <T> WhenApplication <T>(this ApplicationModulesManager manager, Func <XafApplication, IObservable <T> > retriedExecution) => manager.WhereApplication().ToObservable(ImmediateScheduler.Instance) .SelectMany(application => Observable.Defer(() => retriedExecution(application)).Retry(application));
public IObservable <Unit> Save()
{
return(Observable.Defer(() => Observable.Start(() => Settings.Default.Save())));
}
public override IObservable <Vector2> Generate()
{
return(Observable.Defer(() => Observable.Return(new Vector2(X, Y))));
}
public override IObservable <TSource> Process <TSource>(IObservable <TSource> source)
{
return(Observable.Defer(() =>
{
var fbo = 0;
var faceSize = 0;
var depthRenderbuffer = 0;
var colorTarget = default(Texture);
var name = TextureName;
if (string.IsNullOrEmpty(name))
{
throw new InvalidOperationException("A texture name must be specified.");
}
return source.CombineEither(
ShaderManager.WindowSource.Do(window =>
{
window.Update(() =>
{
GL.GenFramebuffers(1, out fbo);
GL.GenRenderbuffers(1, out depthRenderbuffer);
colorTarget = window.ResourceManager.Load <Texture>(name);
GL.BindTexture(TextureTarget.TextureCubeMap, colorTarget.Id);
GL.GetTexLevelParameter(TextureTarget, 0, GetTextureParameter.TextureWidth, out faceSize);
GL.BindFramebuffer(FramebufferTarget.Framebuffer, fbo);
GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, depthRenderbuffer);
GL.RenderbufferStorage(RenderbufferTarget.Renderbuffer, RenderbufferStorage.DepthComponent, faceSize, faceSize);
GL.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, FramebufferAttachment.DepthAttachment, RenderbufferTarget.Renderbuffer, depthRenderbuffer);
GL.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0, TextureTarget, colorTarget.Id, 0);
GL.BindTexture(TextureTarget.TextureCubeMap, 0);
GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, 0);
GL.BindFramebuffer(FramebufferTarget.Framebuffer, 0);
});
}),
(input, window) =>
{
foreach (var state in renderState)
{
state.Execute(window);
}
var clearMask = ClearMask;
GL.BindFramebuffer(FramebufferTarget.Framebuffer, fbo);
window.UpdateViewport(faceSize, faceSize);
window.UpdateScissor(faceSize, faceSize);
if (clearMask != ClearBufferMask.None)
{
GL.ClearColor(ClearColor);
GL.Clear(clearMask);
}
foreach (var shader in window.Shaders)
{
shader.Dispatch();
}
window.UpdateViewport();
window.UpdateScissor();
GL.BindFramebuffer(FramebufferTarget.Framebuffer, 0);
return input;
}).Finally(() =>
{
if (fbo > 0)
{
GL.DeleteFramebuffers(1, ref fbo);
GL.DeleteRenderbuffers(1, ref depthRenderbuffer);
}
});
}));
}
/// <summary>
/// Initializes a new instance of the <see cref="ObservableSocket"/> class.
/// </summary>
/// <param name="tcpClient">The TCP client to wrap.</param>
protected ObservableSocket(TcpClient tcpClient)
{
Log = LogProvider.GetLogger(GetType());
id = Interlocked.Increment(ref IdCounter);
this.tcpClient = tcpClient;
subject = new Subject <byte[]>();
receiver = Observable.Defer(
() =>
{
if (isStarted.EnsureCalledOnce())
{
return(subject.AsObservable());
}
Task.Run(
async() =>
{
SafeLog(LogLevel.Trace, () => "{0} Worker Thread {1} started".Fmt(GetType(), id));
int bytesRead = 1;
var stream = tcpClient.GetStream();
byte[] buffer = SharedPools.ByteArray.Allocate();
try
{
while (bytesRead > 0)
{
bytesRead = await stream.ReadAsync(buffer, 0, buffer.Length, readCancellationToken.Token);
if (bytesRead > 0)
{
if (bytesRead == buffer.Length)
{
subject.OnNext(buffer);
}
else
{
subject.OnNext(buffer.Take(bytesRead).ToArray());
}
}
else
{
subject.OnCompleted();
}
}
}
catch (ObjectDisposedException)
{
//expected - normal shutdown
subject.OnCompleted();
}
catch (TaskCanceledException)
{
//expected - normal shutdown
subject.OnCompleted();
}
catch (IOException ex)
{
if (ex.InnerException is ObjectDisposedException)
{
//expected - normal shutdown
subject.OnCompleted();
}
else
{
//socket comms interrupted - propogate the error up the layers
SafeLog(LogLevel.Error, () => "IO Error reading from stream", ex);
subject.OnError(ex);
}
}
catch (SocketException ex)
{
//socket comms interrupted - propogate the error up the layers
SafeLog(LogLevel.Error, () => "Socket Error reading from stream", ex);
subject.OnError(ex);
}
catch (Exception ex)
{
//unexpected error
SafeLog(LogLevel.Error, () => "Unexpected Error reading from stream", ex);
subject.OnError(ex);
}
finally
{
SharedPools.ByteArray.Free(buffer);
SafeLog(LogLevel.Trace, () => "{0} Worker Thread {1} completed".Fmt(GetType(), id));
Dispose();
}
});
return(subject.AsObservable());
});
}
public override IObservable <Matrix4> Generate()
{
return(Observable.Defer(() => Observable.Return(Matrix4.CreateOrthographic(Width, Height, NearClip, FarClip))));
}
public override IObservable <Mat> Process(IObservable <Mat> source)
{
return(Observable.Defer(() =>
{
Mat kernel = null;
Mat overlap = null;
Mat overlapInput = null;
Mat overlapEnd = null;
Mat overlapStart = null;
Mat overlapFilter = null;
Rect overlapOutput = default(Rect);
float[] currentKernel = null;
return source.Select(input =>
{
if (Kernel != currentKernel ||
currentKernel != null &&
(input.Rows != overlapOutput.Height ||
input.Cols != overlapOutput.Width))
{
currentKernel = Kernel;
if (currentKernel == null || currentKernel.Length == 0)
{
kernel = null;
}
else
{
kernel = new Mat(1, currentKernel.Length, Depth.F32, 1);
Marshal.Copy(currentKernel, 0, kernel.Data, currentKernel.Length);
var anchor = Anchor;
if (anchor == -1)
{
anchor = kernel.Cols / 2;
}
overlap = new Mat(input.Rows, input.Cols + kernel.Cols - 1, input.Depth, input.Channels);
overlapInput = overlap.GetSubRect(new Rect(kernel.Cols - 1, 0, input.Cols, input.Rows));
overlapFilter = new Mat(overlap.Rows, overlap.Cols, overlap.Depth, overlap.Channels);
if (kernel.Cols > 1)
{
overlapEnd = overlap.GetSubRect(new Rect(overlap.Cols - kernel.Cols + 1, 0, kernel.Cols - 1, input.Rows));
overlapStart = overlap.GetSubRect(new Rect(0, 0, kernel.Cols - 1, input.Rows));
}
overlapOutput = new Rect(anchor, 0, input.Cols, input.Rows);
CV.CopyMakeBorder(input, overlap, new Point(kernel.Cols - 1, 0), IplBorder.Reflect);
}
}
if (kernel == null)
{
return input;
}
else
{
CV.Copy(input, overlapInput);
CV.Filter2D(overlap, overlapFilter, kernel, new Point(Anchor, -1));
if (overlapEnd != null)
{
CV.Copy(overlapEnd, overlapStart);
}
return overlapFilter.GetSubRect(overlapOutput).Clone();
}
});
}));
}
public async Task LaunchBuildServerInfoFetchOperationAsync()
{
await TaskScheduler.Default;
CancelBuildStatusFetchOperation();
var launchToken = _launchCancellation.Next();
var buildServerAdapter = await GetBuildServerAdapterAsync().ConfigureAwait(false);
await _revisionGridView.SwitchToMainThreadAsync(launchToken);
_buildServerAdapter?.Dispose();
_buildServerAdapter = buildServerAdapter;
await TaskScheduler.Default;
if (buildServerAdapter is null || launchToken.IsCancellationRequested)
{
return;
}
var scheduler = NewThreadScheduler.Default;
// Run this first as it (may) force start queries
var runningBuildsObservable = buildServerAdapter.GetRunningBuilds(scheduler);
var fullDayObservable = buildServerAdapter.GetFinishedBuildsSince(scheduler, DateTime.Today - TimeSpan.FromDays(3));
var fullObservable = buildServerAdapter.GetFinishedBuildsSince(scheduler);
bool anyRunningBuilds = false;
var delayObservable = Observable.Defer(() => Observable.Empty <BuildInfo>()
.DelaySubscription(anyRunningBuilds ? ShortPollInterval : LongPollInterval));
var shouldLookForNewlyFinishedBuilds = false;
DateTime nowFrozen = DateTime.Now;
// All finished builds have already been retrieved,
// so looking for new finished builds make sense only if running builds have been found previously
var fromNowObservable = Observable.If(() => shouldLookForNewlyFinishedBuilds,
buildServerAdapter.GetFinishedBuildsSince(scheduler, nowFrozen)
.Finally(() => shouldLookForNewlyFinishedBuilds = false));
var cancellationToken = new CompositeDisposable
{
fullDayObservable.OnErrorResumeNext(fullObservable)
.OnErrorResumeNext(Observable.Empty <BuildInfo>()
.DelaySubscription(LongPollInterval)
.OnErrorResumeNext(fromNowObservable)
.Retry()
.Repeat())
.ObserveOn(MainThreadScheduler.Instance)
.Subscribe(OnBuildInfoUpdate),
runningBuildsObservable.Do(buildInfo =>
{
anyRunningBuilds = true;
shouldLookForNewlyFinishedBuilds = true;
})
.OnErrorResumeNext(delayObservable)
.Finally(() => anyRunningBuilds = false)
.Retry()
.Repeat()
.ObserveOn(MainThreadScheduler.Instance)
.Subscribe(OnBuildInfoUpdate)
};
await _revisionGridView.SwitchToMainThreadAsync(launchToken);
CancelBuildStatusFetchOperation();
_buildStatusCancellationToken = cancellationToken;
}
public static IObservable <Unit> OnMessage(this Socket clientSocket)
{
return(Observable.Defer(() => new MessagePump(clientSocket)));
}
/// <summary>
/// Creates an observable sequence by reading lines to the end of the specified <paramref name="reader"/> each time
/// the <paramref name="textAvailable"/> sequence notifies that additional text is available to be read
/// and advances the position within the reader to the end of the stream.
/// </summary>
/// <typeparam name="TOther">The type of elements in the sequence that notifies when text is available to be read.</typeparam>
/// <param name="reader">The object from which lines are read as they become available.</param>
/// <param name="textAvailable">An observable sequence that notifies when additional text is available to be read.</param>
/// <param name="scheduler">An object used to schedule reads.</param>
/// <remarks>
/// <para>
/// The <paramref name="textAvailable"/> sequence does not have to notify when new lines are available. It only must notify when
/// new text is available, which may or may not have new lines. Characters that are read up to the end of the stream are automatically
/// buffered until a new line sequence is encountered in a subsequent read. A consequence of this behavior is that if the stream does
/// not end with a new line sequence and it's not going to receive any more text, then the last line will not be read until
/// <paramref name="textAvailable"/> calls <strong>OnCompleted</strong>.
/// </para>
/// <para>
/// The generated sequence is intended to match the underlying stream; however, this behavior
/// depends on whether the reader is well-behaved and whether the reader is not being shared. Reading always starts from the
/// current position of the reader in the underlying stream. The reader is expected to increment its position in the stream
/// when it's read. Each time that the <paramref name="textAvailable"/> sequence notifies that additional text is available,
/// reading is expected to begin at the previous position in the stream, but if the reader is shared or it's not well-behaved,
/// then the generated sequence may contain unexpected data.
/// </para>
/// </remarks>
/// <returns>An observable sequence of lines read from the specified <paramref name="reader"/>.</returns>
public static IObservable <string> ToObservableLines <TOther>(this TextReader reader, IObservable <TOther> textAvailable, IScheduler scheduler)
{
Contract.Requires(reader != null);
Contract.Requires(textAvailable != null);
Contract.Requires(scheduler != null);
Contract.Ensures(Contract.Result <IObservable <string> >() != null);
var buffer = new char[1024];
var remainder = new StringBuilder(1024);
var lines = new Queue <Tuple <int, int> >();
var ignoreLeadingNewLine = false;
return(textAvailable.Consume(
_ =>
{
if (lines.Count > 0)
{
var line = lines.Dequeue();
return Maybe.Return(new string(buffer, line.Item1, line.Item2));
}
int read = reader.Read(buffer, 0, buffer.Length);
int nextLineStart = 0;
if (read > 0 && ignoreLeadingNewLine)
{
if (buffer[0] == '\n')
{
nextLineStart = 1;
}
ignoreLeadingNewLine = false;
}
for (int i = nextLineStart; i < read; i++)
{
var c = buffer[i];
switch (c)
{
case '\r':
case '\n':
lines.Enqueue(Tuple.Create(nextLineStart, i - nextLineStart));
if (c == '\r')
{
if (i + 1 < read)
{
if (buffer[i + 1] == '\n')
{
i++;
}
}
else
{
ignoreLeadingNewLine = true;
}
}
nextLineStart = i + 1;
break;
}
}
Maybe <string> value;
if (lines.Count > 0)
{
var line = lines.Dequeue();
if (remainder.Length > 0)
{
remainder.Append(buffer, line.Item1, line.Item2);
value = Maybe.Return(remainder.ToString());
remainder.Length = 0;
}
else
{
value = Maybe.Return(new string(buffer, line.Item1, line.Item2));
}
}
else
{
value = Maybe.Empty <string>();
}
if (nextLineStart < read)
{
remainder.Append(buffer, nextLineStart, read - nextLineStart);
}
return value;
},
scheduler)
.Concat(Observable.Defer(() =>
remainder.Length > 0
? Observable.Return(remainder.ToString(), scheduler)
: Observable.Empty <string>(scheduler))));
}
public override IObservable <Categorical> Generate()
{
return(Observable.Defer(() => Observable.Return(new Categorical(ProbabilityMass))));
}
public override IObservable <Extrinsics> Generate()
{
return(Observable.Defer(() => Observable.Return(Create())));
}
public override IObservable <KeyPointOpticalFlow> Process(IObservable <Tuple <KeyPointCollection, IplImage> > source)
{
return(Observable.Defer(() =>
{
IplImage previousImage = null;
IplImage previousPyramid = null;
IplImage currentPyramid = null;
return source.Select(input =>
{
var previous = input.Item1;
var currentImage = input.Item2;
var currentKeyPoints = new KeyPointCollection(currentImage);
if (previous.Count == 0)
{
return new KeyPointOpticalFlow(previous, currentKeyPoints);
}
if (currentPyramid == null || currentPyramid.Size != currentImage.Size)
{
previousImage = null;
previousPyramid = new IplImage(currentImage.Size, currentImage.Depth, currentImage.Channels);
currentPyramid = new IplImage(currentImage.Size, currentImage.Depth, currentImage.Channels);
}
var maxIterations = MaxIterations;
var epsilon = Epsilon;
var terminationType = TermCriteriaType.None;
if (maxIterations > 0)
{
terminationType |= TermCriteriaType.MaxIter;
}
if (epsilon > 0)
{
terminationType |= TermCriteriaType.Epsilon;
}
var termCriteria = new TermCriteria(terminationType, maxIterations, epsilon);
var flags = previousImage == previous.Image ? LKFlowFlags.PyrAReady : LKFlowFlags.None;
var previousFeatures = new Point2f[previous.Count];
for (int i = 0; i < previousFeatures.Length; i++)
{
previousFeatures[i] = previous[i];
}
var currentFeatures = new Point2f[previousFeatures.Length];
var status = new byte[previousFeatures.Length];
var trackError = new float[previousFeatures.Length];
CV.CalcOpticalFlowPyrLK(
previous.Image,
currentImage,
previousPyramid,
currentPyramid,
previousFeatures,
currentFeatures,
WindowSize,
Level,
status,
trackError,
termCriteria,
flags);
var previousKeyPoints = new KeyPointCollection(previous.Image);
for (int i = 0; i < status.Length; i++)
{
if (status[i] == 0 ||
trackError[i] > MaxError ||
currentFeatures[i].X <0 ||
currentFeatures[i].Y <0 ||
currentFeatures[i].X> currentImage.Width - 1 ||
currentFeatures[i].Y> currentImage.Height - 1)
{
continue;
}
previousKeyPoints.Add(previousFeatures[i]);
currentKeyPoints.Add(currentFeatures[i]);
}
var temp = currentPyramid;
currentPyramid = previousPyramid;
previousPyramid = temp;
previousImage = currentImage;
return new KeyPointOpticalFlow(previousKeyPoints, currentKeyPoints);
});
}));
}
/// <summary>
/// Publishes a gist to GitHub.
/// </summary>
/// <param name="apiClient">The client to use to post to GitHub.</param>
/// <param name="gist">The new gist to post.</param>
/// <returns>The created gist.</returns>
public IObservable <Gist> PublishGist(IApiClient apiClient, NewGist gist)
{
return(Observable.Defer(() => apiClient.CreateGist(gist)));
}
public static IObservable <T> ToObservable <T>(this IEnumeratorAsync <T> enumeratorAsync)
{
var nextItem = Observable.Defer(() => enumeratorAsync.MoveNextAsync().ToObservable());
return(nextItem.Repeat().TakeUntil(b => !b).Select(b => enumeratorAsync.Current));
}
public IObservable <ResourceEvent <TResource> > GetResource(ResourceStreamType type)
{
var childScheduler = new EventLoopScheduler(); // dedicated thread for the child on which all messages are syncrhonized
return(Observable.Defer(async() =>
{
AddSubscriber();
_logger.LogTrace("Subscriber awaiting cache synchronization before attaching");
var isCacheSynchronized = await _cacheSynchronized.Task;
if (!isCacheSynchronized) // really this only happens if the reset is the master completes before first reset, in which case the downstream subscriber gets nothing
{
return Observable.Empty <ResourceEvent <TResource> >();
}
// we use lock to pause any processing of the broadcaster while we're attaching to the stream so proper alignment can be made
_logger.LogTrace("Subscriber attaching to broadcaster");
return Observable.Create <ResourceEvent <TResource> >(observer =>
{
var broadcasterAttachment = Disposable.Empty;
var cacheSnapshot = _cache.Snapshot();
if (type.HasFlag(ResourceStreamType.List))
{
_logger.LogTrace($"Flushing contents of cache version {cacheSnapshot.Version}");
_cache.Values
.ToReset(type == ResourceStreamType.ListWatch)
.ToObservable()
.Concat(Observable.Never <ResourceEvent <TResource> >())
.ObserveOn(Scheduler.Immediate)
.Subscribe(observer);
}
if (type.HasFlag(ResourceStreamType.Watch))
{
broadcasterAttachment = _masterObservable
// we could be ahead of broadcaster because we initialized from cache which gets updated before the message are sent to broadcaster
// this logic realigns us at the correct point with the broadcaster
.Do(x => _logger.LogTrace($"Received from broadcaster {x}"))
.SkipWhile(x => x.MessageNumber <= cacheSnapshot.Version)
.Select(x => x.Value)
.Do(x => _logger.LogTrace($"Aligned with broadcaster {x}"))
.SubscribeOn(_masterScheduler)
.ObserveOn(childScheduler)
.Subscribe(observer, () =>
{
_logger.LogTrace("Child OnComplete");
RemoveSubscriber();
});
}
else
{
observer.OnCompleted();
}
// let broadcaster know we're done attaching to stream so it can resume it's regular work
_logger.LogTrace("Finished attaching to stream - signalling to resume");
lock (_lock)
{
_waitingSubscribers.Signal();
}
return broadcasterAttachment;
})
.ObserveOn(childScheduler)
.SubscribeOn(childScheduler);
})
.SubscribeOn(childScheduler) // ensures that when we attach master observer it's done on child thread, as we plan on awaiting cache synchronization
.Do(_ => _logger.LogTrace($"Shared informer out: {_}")));
}
public override IObservable <Pose> Process(IObservable <IplImage> source)
{
return(Observable.Defer(() =>
{
TFSessionOptions options = new TFSessionOptions();
unsafe
{
byte[] GPUConfig = new byte[] { 0x32, 0x02, 0x20, 0x01 };
fixed(void *ptr = &GPUConfig[0])
{
options.SetConfig(new IntPtr(ptr), GPUConfig.Length);
}
}
var graph = new TFGraph();
var session = new TFSession(graph, options, null);
var bytes = File.ReadAllBytes(ModelFileName);
graph.Import(bytes);
TFTensor tensor = null;
var config = ConfigHelper.PoseConfig(PoseConfigFileName);
return source.Select(input =>
{
if (tensor == null || tensor.GetTensorDimension(1) != input.Height || tensor.GetTensorDimension(2) != input.Width)
{
tensor = new TFTensor(
TFDataType.Float,
new long[] { 1, input.Height, input.Width, 3 },
input.WidthStep * input.Height * 4);
}
using (var image = new IplImage(input.Size, IplDepth.F32, 3, tensor.Data))
{
CV.Convert(input, image);
}
var runner = session.GetRunner();
runner.AddInput(graph["Placeholder"][0], tensor);
runner.Fetch(graph["concat_1"][0]);
// Run the model
var output = runner.Run();
// Fetch the results from output:
var poseTensor = output[0];
var pose = new Mat((int)poseTensor.Shape[0], (int)poseTensor.Shape[1], Depth.F32, 1, poseTensor.Data);
var result = new Pose(input);
var threshold = MinConfidence;
for (int i = 0; i < pose.Rows; i++)
{
BodyPart bodyPart;
bodyPart.Name = config[i];
bodyPart.Confidence = (float)pose.GetReal(i, 2);
if (bodyPart.Confidence < threshold)
{
bodyPart.Position = new Point2f(float.NaN, float.NaN);
}
else
{
bodyPart.Position.X = (float)pose.GetReal(i, 1);
bodyPart.Position.Y = (float)pose.GetReal(i, 0);
}
result.Add(bodyPart);
}
return result;
});
}));
}
public override IObservable <Matrix4> Generate()
{
return(Observable.Defer(() => Observable.Return(Matrix4.CreateRotationZ(Angle))));
}
public static IObservable <T> StartWith <T>(this IObservable <T> source, Func <T> value, IScheduler scheduler) => Observable.Defer(() => Observable.Start(value, scheduler).Concat(source));
private static IObservable <KeyedOperation> ProcessOperation(KeyedOperation operation)
{
return(Observable.Defer(operation.EvaluateFunc)
.Select(_ => operation)
.Catch(Observable.Return(operation)));
}