private void TakeSample(TimeSpan timestamp)
{
if (timestamp == lastTimestamp)
{
return;
}
lastTimestamp = timestamp;
_bitmap.Render(_drawing);
var rect = Sample;
byte[] pixel = new byte[rect.Width * rect.Height * 4];
_bitmap.CopyPixels(new Int32Rect(0, 0, Sample.Width, Sample.Height), pixel, rect.Width * 4, 0);
byte[] rgbPixels = SampleCondition.ConvertBgraToRgb(pixel);
Color average = SampleCondition.GetAverageColor(rgbPixels);
if (_colorsByTime.All(i => i.Item1 != timestamp))
{
_colorsByTime.Add(new Tuple <TimeSpan, Color>(timestamp, average));
while (_colorsByTime.Count > 500)
{
_colorsByTime.RemoveAt(0);
}
}
PixelPreview = new SolidColorBrush(average);
}
private void SourceOnProgressChanged(object sender, TimeSpan progress)
{
if (Sampler == null)
{
return;
}
if (Frames == null)
{
_colors = Sampler.GetColors(progress, Samples);
}
else
{
double frame = progress.TotalSeconds * Frames.DurationDenominator * Frames.TotalFramesInVideo / Frames.DurationNumerator;
int lastIndex = (int)Math.Round(frame);
int firstIndex = lastIndex - Samples + 1;
lastIndex = ClampInt(lastIndex, 0, Frames.Count);
firstIndex = ClampInt(firstIndex, 0, Frames.Count);
_colors = Frames.Skip(firstIndex - 1).Take(lastIndex - firstIndex)
.Select(p => SampleCondition.GetAverageColor(p.Capture)).Reverse().ToList();
}
InvalidateVisual();
}
protected override void OnRender(DrawingContext drawingContext)
{
var rect = new Rect(0, 0, ActualWidth, ActualHeight);
Color[] colors;
if (_colors == null)
{
drawingContext.DrawRectangle(Brushes.Black, null, rect);
}
else
{
colors = _colors.ToArray();
Array.Reverse(colors);
var background = new LinearGradientBrush(HeatMapGenerator.GradientsSharpFromColors(colors),
new Point(0, 0), new Point(1, 0));
drawingContext.DrawRectangle(background, null, rect);
var conditionRect = new Rect(0, ActualHeight - 8, ActualWidth, 8);
if (SampleCondition == null)
{
drawingContext.DrawRectangle(Brushes.Black, null, conditionRect);
}
else
{
var samples = new Color[colors.Length];
Color previousColor = Colors.Black;
for (int i = 0; i < samples.Length; i++)
{
bool isOk = SampleCondition.CheckSample(
new[] { colors[i].R, colors[i].G, colors[i].B },
new[] { previousColor.R, previousColor.G, previousColor.B });
samples[i] = isOk ? Colors.Lime : Colors.Red;
previousColor = colors[i];
}
var results = new LinearGradientBrush(HeatMapGenerator.GradientsSharpFromColors(samples),
new Point(0, 0), new Point(1, 0));
drawingContext.DrawRectangle(results, null, conditionRect);
}
if (_down)
{
_segment = (int)(_mousePos.X / ActualWidth * _colors.Count);
_segment = Math.Max(0, Math.Min(_colors.Count - 1, _segment));
double segmentWidth = ActualWidth / _colors.Count;
var selectRect = new Rect(segmentWidth * _segment, 0, segmentWidth, ActualHeight);
drawingContext.DrawRectangle(null, new Pen(Brushes.Red, 1), selectRect);
UpdateToolTip();
}
}
}
public SampleAnalyser(SampleCondition condition, AnalysisParameters parameters)
{
_previousSample = new byte[] { 0, 0, 0 };
_condition = condition;
_parameters = parameters;
}
public SampleAnalyser(SampleCondition condition, AnalysisParameters parameters)
{
_condition = condition;
_parameters = parameters;
}