public static async Task Run(WebSocket webSocket)
{
var scaleNom = 1;
var scaleDen = 1;
var width = (1280 * scaleNom / scaleDen) | 0;
var height = (720 * scaleNom / scaleDen) | 0;
var frameSpec = new FrameSpec(width, height, 1);
using (var jpegCompressor = new JpegCompressor())
{
const int workerCount = 2;
var receiveBuffer = new byte[1024 * 4];
var stats = new FrameStats();
var workers = Enumerable.Range(0, workerCount)
.Select(index => new FrameWorker(frameSpec, "background-small.jpg", jpegCompressor, stats, webSocket))
.ToArray();
var requests = Enumerable.Repeat(FrameRequest.Completed, workerCount)
.ToArray();
int workerIndex = 0;
// Ready to start
await webSocket.SendJsonAsync("READY", frameSpec);
double lastFrameTimeMS = -1;
int lastFrameId = -1;
// Start render loop
while (!webSocket.CloseStatus.HasValue) // && lastFrameTimeMS < 250)
{
var message = await webSocket.ReceiveJsonAsync(default, receiveBuffer);
public FrameWorker(FrameSpec spec, string backgroundPath, JpegCompressor jpegCompressor, FrameStats stats, WebSocket webSocket)
{
_spec = spec;
_stats = stats;
_background = backgroundPath == null ? null : Image.FromFile(backgroundPath);
_jpegCompressor = jpegCompressor;
_webSocket = webSocket;
_cancellationSource = new CancellationTokenSource();
_cancellationToken = _cancellationSource.Token;
_thread = new Thread(ThreadEntry)
{
Priority = ThreadPriority.AboveNormal
};
_thread.Start();
}
public JpegFrame(JpegCompressor compressor, int width, int height, TJSubsamplingOptions subSampling)
{
_compressor = compressor;
checked
{
Width = width;
Height = height;
SubSampling = subSampling;
MaxBufferSize = (int)JpegLibrary.tjBufSize(width, height, (int)subSampling);
}
var bufferHandle = JpegLibrary.tjAlloc(MaxBufferSize);
if (bufferHandle == IntPtr.Zero)
{
throw new OutOfMemoryException(
$"Failed to allocate TurboJPEG buffer of size {width}x{height}, subSampling {subSampling}");
}
SetResourceHandle(bufferHandle);
}
protected override void Free(IntPtr handle)
{
_compressor = null;
JpegLibrary.tjFree(handle);
}