/// <summary>
/// Highlights a motion detection cell, typically to indicate a threshold was tripped.
/// </summary>
/// <param name="r">Red channel of the highlight RGB color</param>
/// <param name="g">Green channel of the highlight RGB color</param>
/// <param name="b">Blue channel of the highlight RGB color</param>
/// <param name="driver">The <see cref="FrameDiffDriver"/> containing the buffer</param>
/// <param name="metadata">The <see cref="FrameAnalysisMetadata"/> structure with frame properties</param>
/// <param name="index">The array index of the cell to highlight</param>
/// <param name="buffer">The frame buffer to draw into</param>
protected void HighlightCell(byte r, byte g, byte b, FrameDiffDriver driver, FrameAnalysisMetadata metadata, int index, byte[] buffer)
{
for (int x = driver.CellRect[index].X; x < driver.CellRect[index].X + driver.CellRect[index].Width; x++)
{
var y = driver.CellRect[index].Y;
var i = (x * metadata.Bpp) + (y * metadata.Stride);
buffer[i] = r;
buffer[i + 1] = g;
buffer[i + 2] = b;
y += driver.CellRect[index].Height - 1;
i = (x * metadata.Bpp) + (y * metadata.Stride);
buffer[i] = r;
buffer[i + 1] = g;
buffer[i + 2] = b;
}
for (int y = driver.CellRect[index].Y; y < driver.CellRect[index].Y + driver.CellRect[index].Height; y++)
{
var x = driver.CellRect[index].X;
var i = (x * metadata.Bpp) + (y * metadata.Stride);
buffer[i] = r;
buffer[i + 1] = g;
buffer[i + 2] = b;
x += driver.CellRect[index].Width - 1;
i = (x * metadata.Bpp) + (y * metadata.Stride);
buffer[i] = r;
buffer[i + 1] = g;
buffer[i + 2] = b;
}
}
/// <summary>
/// Creates a new <see cref="FrameBufferCaptureHandler"/> configured for motion detection analysis (either using a recorded
/// raw video stream where MMALStandalone.Instance is used, or when the camera is used but triggering motion detection events
/// is unnecessary). If motion detection events are desired, use the camera's WithMotionDetection method.
/// </summary>
/// <param name="motionConfig">The motion configuration.</param>
/// <param name="onDetect">A callback for when motion is detected.</param>
public FrameBufferCaptureHandler(MotionConfig motionConfig, Action onDetect)
: base()
{
_driver = new FrameDiffDriver(motionConfig, onDetect);
_detectingMotion = true;
}
/// <inheritdoc />
public void ConfigureMotionDetection(MotionConfig config, Action onDetect)
{
_driver = new FrameDiffDriver(config, onDetect);
this.EnableMotionDetection();
}
