private Data <Frame> GetRuntimeFrame(VideoBlenderInputRuntime runtime)
{
if (runtime.Frames.Count > 0)
{
long first = ToTicks(runtime.Frames.First.Value.Payload.GetPts());
if (_currentFpsTicks < first)
{
return(runtime.Frames.First.Value);
}
if (first + runtime.Tension >= _currentFpsTicks && runtime.Tension > -1)
{
runtime.Tension--;
}
while (first + runtime.Tension < _currentFpsTicks && runtime.Frames.Count > 1)
{
_framePool.Back(runtime.Frames.First.Value.Payload);
runtime.Frames.RemoveFirst();
first = ToTicks(runtime.Frames.First.Value.Payload.GetPts());
if (first + runtime.Tension < _currentFpsTicks && runtime.Tension < 1) // this is kind of shock absorber. Can have values from -1 to 1
{
// no need to remove more this cycle
runtime.Tension++;
}
}
if (runtime.BlackScreenDelay >= 0 && ToTime(_currentFpsTicks) - ToTime(first) > runtime.BlackScreenDelay) // to old
{
//Core.LogInfo($"{Core.FormatTicks(ToTime(_currentFpsTicks))} - {Core.FormatTicks(ToTime(first))} Blend NoSignal");
return(GetOrCreateNoSignalFrame(runtime));
}
else
{
//Core.LogInfo($"{Core.FormatTicks(ToTime(_currentFpsTicks))} - {Core.FormatTicks(ToTime(first))} -({runtime.Frames.Count})- {Core.FormatTicks(runtime.Frames.Last.Value.Payload.GetPts())} Blend");
return(runtime.Frames.First.Value);
}
}
else
{
var now = Core.GetCurrentTime();
if (now - runtime.StartupTime > 500_0000) // 500 ms
{
return(GetOrCreateNoSignalFrame(runtime));
}
else
{
return(null);
}
}
}
private Data <Frame> GetRuntimeOrFixedFrame(VideoBlenderInputRuntime runtime)
{
if (runtime.FixedFrame == null)
{
return(GetRuntimeFrame(runtime));
}
else
{
return(new Data <Frame>(runtime.FixedFrame.Instance.Item, 0, 0, null));
}
}
private DirectXPipeline <BlendingConstantBuffer> GetPipeline(VideoBlenderInputRuntime runtime, DirectXResource canvas, DirectXResource image)
{
if (_directXPipelineLowRes != null)
{
if (runtime.Description.Ptz.Width > 0 && runtime.Description.Ptz.Height > 0)
{
var heightScale = runtime.Description.Rect.Height / runtime.Description.Ptz.Height;
var widthScale = runtime.Description.Rect.Width / runtime.Description.Ptz.Width;
if (heightScale * canvas.Texture2D.Description.Height < 0.8 * image.Texture2D.Description.Height ||
widthScale * canvas.Texture2D.Description.Width < 0.8 * image.Texture2D.Description.Width)
{
return(_directXPipelineLowRes);
}
}
}
return(_directXPipeline);
}
private void UpdatePositionInDxPipeline(VideoBlenderInputRuntime runtime, DirectXPipeline <BlendingConstantBuffer> pipeline, int width, int height)
{
var rect = runtime.Description.Rect;
var ptz = runtime.Description.Ptz;
var currect = runtime.VertexBuffer;
pipeline.UpdatePosition(new RectangleF((float)rect.Left, (float)rect.Top, (float)rect.Width, (float)rect.Height),
new RectangleF((float)ptz.Left, (float)ptz.Top, (float)ptz.Width, (float)ptz.Height),
runtime.Description.FilterChain?.HasHFlip() == true, runtime.Description.FilterChain?.HasVFlip() == true, ref currect);
runtime.VertexBuffer = currect;
pipeline.SetExternalPosition(new Viewport(0, 0, _setup.Width, _setup.Height), currect);
pipeline.SetConstantBuffer(new BlendingConstantBuffer
{
ViewProj = Matrix.Identity,
base_dimension = new Vector2(width, height),
base_dimension_i = new Vector2(1f / width, 1f / height),
undistort_factor = 1.0f
}, true);
}
