/// <inheritdoc />
public override void Apply(byte[] data, bool eos)
{
if (this.FullTestFrame)
{
MMALLog.Logger.LogDebug("Have full test frame");
// If we have a full test frame stored then we can start storing subsequent frame data to check.
base.Apply(data, eos);
}
else
{
this.TestFrame.AddRange(data);
if (eos)
{
this.FullTestFrame = true;
MMALLog.Logger.LogDebug("EOS reached for test frame. Applying edge detection.");
// We want to apply Edge Detection to the test frame to make it easier to detect changes.
var edgeDetection = new EdgeDetection(this.MotionConfig.Sensitivity);
this.ImageContext.Data = this.TestFrame.ToArray();
edgeDetection.ApplyConvolution(edgeDetection.Kernel, EdgeDetection.KernelWidth, EdgeDetection.KernelHeight, this.ImageContext);
}
}
if (this.FullFrame)
{
MMALLog.Logger.LogDebug("Have full frame, checking for changes.");
// TODO: Check for changes.
this.CheckForChanges(this.OnDetect);
}
}
private void CheckForChanges(Action onDetect)
{
var edgeDetection = new EdgeDetection(EDStrength.Medium);
this.ImageContext.Data = this.WorkingData.ToArray();
edgeDetection.ApplyConvolution(EdgeDetection.MediumStrengthKernel, 3, 3, this.ImageContext);
var diff = this.Analyse();
MMALLog.Logger.LogDebug($"Diff size: {diff}");
if (diff >= this.MotionConfig.Threshold)
{
MMALLog.Logger.LogInformation("Motion detected!");
onDetect();
}
}