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StreamingHub.cs
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StreamingHub.cs
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using Google.Protobuf;
using Grpc.Core;
using Grpc.Net.Client;
using Microsoft.AspNetCore.SignalR;
using Streamer;
using StreamServer.Models;
using System;
using System.Buffers;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Http;
using System.Reactive.Linq;
using System.Reactive.Subjects;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Threading.Tasks.Dataflow;
namespace StreamServer.Hubs
{
public class StreamingHub : Hub
{
HttpClientHandler httpHandler = new HttpClientHandler
{
ServerCertificateCustomValidationCallback = HttpClientHandler.DangerousAcceptAnyServerCertificateValidator
};
public async Task SendImage(int index, int x, int y, int w, int h, bool stop)
{
using (var channel = GrpcChannel.ForAddress("https://localhost:55555", new GrpcChannelOptions { HttpHandler = httpHandler }))
{
var request = new StreamRequest();
request.X = x;
request.Y = y;
request.W = w;
request.H = h;
var client = new Greeter.GreeterClient(channel);
CancellationTokenSource cts = new CancellationTokenSource();
var streamServer = client.StreamingServer(request, cancellationToken: cts.Token);
while (await streamServer.ResponseStream.MoveNext(cts.Token))
{
var base64Data = Convert.ToBase64String(streamServer.ResponseStream.Current.Image.ToByteArray());
var imgData = "data:image/gif;base64," + base64Data;
await Clients.Caller.SendAsync("ReceiveImage", imgData);
}
}
}
static Subject<Streamer> StreamerSubject = new Subject<Streamer>();
private static readonly Dictionary<int, bool> RoomHasSubscriber = new Dictionary<int, bool>();
public async Task Subscribe(int index, int x, int y, int w, int h, bool stop)
{
var subscription = StreamerSubject.Subscribe(
async x =>
{
if (x.Index == index)
{
var base64Data = Convert.ToBase64String(x.Image.ToByteArray());
//var base64Data = x.Image.ToBase64();
var imgData = "data:image/gif;base64," + base64Data;
await Clients.Caller.SendAsync("ReceiveImage", imgData);
}
},
() => Console.WriteLine("Sequence Completed."));
if (!RoomHasSubscriber.ContainsKey(index))
{
#pragma warning disable CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
Task.Run(async () =>
{
using (var channel = GrpcChannel.ForAddress("https://localhost:55555", new GrpcChannelOptions { HttpHandler = httpHandler }))
{
var request = new StreamRequest();
request.X = x;
request.Y = y;
request.W = w;
request.H = h;
var client = new Greeter.GreeterClient(channel);
CancellationTokenSource cts = new CancellationTokenSource();
var sb = new StringBuilder();
var streamServer = client.StreamingServer(request, cancellationToken: cts.Token);
RoomHasSubscriber[index] = true;
while (await streamServer.ResponseStream.MoveNext(cts.Token))
{
StreamerSubject.OnNext(new Streamer { Index = index, Image = streamServer.ResponseStream.Current.Image });
}
}
});
#pragma warning restore CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
}
while (!RoomHasSubscriber.ContainsKey(index))
{
await Task.Delay(1000);
}
await Task.Delay(-1);
}
private static readonly Dictionary<int, ArrayPool<byte>> ImagePool = new Dictionary<int, ArrayPool<byte>>();
public async Task SubscribePool(int index, int x, int y, int w, int h, bool stop)
{
var sb = new StringBuilder();
var subscription = StreamerSubject.Subscribe(
async x =>
{
if (x.Index == index)
{
//var base64Data = Convert.ToBase64String(x.Image.ToByteArray());
//var base64Data = x.Image.ToBase64();
//var length = x.Image.Length;
//var arr = ImagePool[index].Rent(length);
//x.Image.CopyTo(arr, 0);
//var imgData = "data:image/gif;base64," + Convert.ToBase64String(arr);
//await Clients.Caller.SendAsync("ReceiveImage", imgData);
//ImagePool[index].Return(arr);
await Clients.Caller.SendAsync("ReceiveImage", x.ImageString);
}
},
() => Console.WriteLine("Sequence Completed."));
if (!RoomHasSubscriber.ContainsKey(index))
{
#pragma warning disable CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
Task.Run(async () =>
{
using (var channel = GrpcChannel.ForAddress("https://localhost:55555", new GrpcChannelOptions { HttpHandler = httpHandler }))
{
var request = new StreamRequest();
request.X = x;
request.Y = y;
request.W = w;
request.H = h;
var client = new Greeter.GreeterClient(channel);
CancellationTokenSource cts = new CancellationTokenSource();
var streamServer = client.StreamingServer(request, cancellationToken: cts.Token);
RoomHasSubscriber[index] = true;
ImagePool[index] = ArrayPool<byte>.Create();
while (await streamServer.ResponseStream.MoveNext(cts.Token))
{
var img = streamServer.ResponseStream.Current.Image;
var length = img.Length;
var arr = ImagePool[index].Rent(length);
img.CopyTo(arr, 0);
var imgData = "data:image/gif;base64," + Convert.ToBase64String(arr);
ImagePool[index].Return(arr);
StreamerSubject.OnNext(new Streamer { Index = index, ImageString = imgData });
}
}
});
#pragma warning restore CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
}
while (!RoomHasSubscriber.ContainsKey(index))
{
await Task.Delay(1000);
}
await Task.Delay(-1);
}
public async Task SubscribeAttempt_v1(int index, int x, int y, int w, int h, bool stop)
{
var sb = new StringBuilder();
var subscription = StreamerSubject.Subscribe(
async x =>
{
if (x.Index == index)
{
//var base64Data = Convert.ToBase64String(x.Image.ToByteArray());
//var base64Data = x.Image.ToBase64();
//var length = x.Image.Length;
//var arr = ImagePool[index].Rent(length);
//x.Image.CopyTo(arr, 0);
//var imgData = "data:image/gif;base64," + Convert.ToBase64String(arr);
//await Clients.Caller.SendAsync("ReceiveImage", imgData);
//ImagePool[index].Return(arr);
await Clients.Caller.SendAsync("ReceiveImage", x.ImageString);
}
},
() => Console.WriteLine("Sequence Completed."));
if (!RoomHasSubscriber.ContainsKey(index))
{
#pragma warning disable CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
Task.Run(async () =>
{
using (var channel = GrpcChannel.ForAddress("https://localhost:55555", new GrpcChannelOptions { HttpHandler = httpHandler }))
{
var request = new StreamRequest();
request.X = x;
request.Y = y;
request.W = w;
request.H = h;
var client = new Greeter.GreeterClient(channel);
CancellationTokenSource cts = new CancellationTokenSource();
var streamServer = client.StreamingServer(request, cancellationToken: cts.Token);
RoomHasSubscriber[index] = true;
ImagePool[index] = ArrayPool<byte>.Create();
while (await streamServer.ResponseStream.MoveNext(cts.Token))
{
var img = streamServer.ResponseStream.Current.Image;
var length = img.Length;
var arr = ImagePool[index].Rent(length);
img.CopyTo(arr, 0);
var imgData = "data:image/gif;base64," + Convert.ToBase64String(arr);
ImagePool[index].Return(arr);
StreamerSubject.OnNext(new Streamer { Index = index, ImageString = imgData });
}
}
});
#pragma warning restore CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
}
while (!RoomHasSubscriber.ContainsKey(index))
{
await Task.Delay(1000);
}
await Task.Delay(-1);
}
public async Task SubscribeAttempt_v2(int index, int x, int y, int w, int h, bool stop)
{
var subscription = StreamerSubject.Subscribe(
async x =>
{
if (x.Index == index)
{
var base64Data = Convert.ToBase64String(x.Image.ToByteArray());
//var base64Data = x.Image.ToBase64(); // even worse than ToByteArray
var length = x.Image.Length;
var arr = ImagePool[index].Rent(length);
x.Image.CopyTo(arr, 0);
var imgData = "data:image/gif;base64," + Convert.ToBase64String(arr);
await Clients.Caller.SendAsync("ReceiveImage", imgData);
ImagePool[index].Return(arr);
}
},
() => Console.WriteLine("Sequence Completed."));
if (!RoomHasSubscriber.ContainsKey(index))
{
#pragma warning disable CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
Task.Run(async () =>
{
using (var channel = GrpcChannel.ForAddress("https://localhost:55555", new GrpcChannelOptions { HttpHandler = httpHandler }))
{
var request = new StreamRequest();
request.X = x;
request.Y = y;
request.W = w;
request.H = h;
var client = new Greeter.GreeterClient(channel);
CancellationTokenSource cts = new CancellationTokenSource();
var streamServer = client.StreamingServer(request, cancellationToken: cts.Token);
RoomHasSubscriber[index] = true;
ImagePool[index] = ArrayPool<byte>.Create();
while (await streamServer.ResponseStream.MoveNext(cts.Token))
{
StreamerSubject.OnNext(new Streamer { Index = index, Image = streamServer.ResponseStream.Current.Image});
}
}
});
#pragma warning restore CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
}
while (!RoomHasSubscriber.ContainsKey(index))
{
await Task.Delay(1000);
}
await Task.Delay(-1);
}
public async Task SubscribeAttempt_v3(int index, int x, int y, int w, int h, bool stop)
{
var sb = new StringBuilder();
var subscription = StreamerSubject.Subscribe(
async x =>
{
if (x.Index == index)
{
var base64Data = Convert.ToBase64String(x.Image.ToByteArray());
//var base64Data = x.Image.ToBase64();
var length = x.Image.Length;
var arr = ImagePool[index].Rent(length);
x.Image.CopyTo(arr, 0);
var imgData = "data:image/gif;base64," + Convert.ToBase64String(arr);
await Clients.Caller.SendAsync("ReceiveImage", imgData);
ImagePool[index].Return(arr);
}
},
() => Console.WriteLine("Sequence Completed."));
if (!RoomHasSubscriber.ContainsKey(index))
{
#pragma warning disable CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
Task.Run(async () =>
{
using (var channel = GrpcChannel.ForAddress("https://localhost:55555", new GrpcChannelOptions { HttpHandler = httpHandler }))
{
var request = new StreamRequest();
request.X = x;
request.Y = y;
request.W = w;
request.H = h;
var client = new Greeter.GreeterClient(channel);
CancellationTokenSource cts = new CancellationTokenSource();
var streamServer = client.StreamingServer(request, cancellationToken: cts.Token);
RoomHasSubscriber[index] = true;
ImagePool[index] = ArrayPool<byte>.Create();
while (await streamServer.ResponseStream.MoveNext(cts.Token))
{
StreamerSubject.OnNext(new Streamer { Index = index, Image = streamServer.ResponseStream.Current.Image });
}
}
});
#pragma warning restore CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
}
while (!RoomHasSubscriber.ContainsKey(index))
{
await Task.Delay(1000);
}
await Task.Delay(-1);
}
}
public class Streamer
{
public int Index { get; set; }
public ByteString Image { get; set; }
public string ImageString { get; set; }
}
}