private void ResolvePacedKeyFrames()
{
var pacedSegments = GetRelevantPacedSegments();
foreach (var pacedSegment in pacedSegments)
{
var startIndex = pacedSegment.Offset;
var startTime = _keyFrames.ElementBefore(startIndex).ResolvedKeyTime;
var segmentLengths = new List <double>(pacedSegment.Count + 1);
var totalSegmentLength = 0d;
var from = _keyFrames[startIndex - 1].Value;
// Calculate the segment lengths for the whole segment. Also include
// the element after the segment.
for (int i = pacedSegment.Offset; i < pacedSegment.Offset + pacedSegment.Count; i++)
{
var to = _keyFrames[i].Value;
totalSegmentLength += _segmentLengthProvider.GetDistanceBetween(from, to);
segmentLengths.Add(totalSegmentLength);
from = to;
}
int frameAfterSegmentIndex = pacedSegment.Offset + pacedSegment.Count;
var frameAfterSegment = _keyFrames[frameAfterSegmentIndex];
TimeSpan totalSegmentDuration = frameAfterSegment.ResolvedKeyTime - startTime;
totalSegmentLength += _segmentLengthProvider.GetDistanceBetween(from, frameAfterSegment.Value);
for (int i = pacedSegment.Offset; i < pacedSegment.Offset + pacedSegment.Count; i++)
{
var currentFrame = _keyFrames[i];
var currentSegmentLength = segmentLengths[i - pacedSegment.Offset];
currentFrame.Resolve(
startTime + TimeSpan.FromMilliseconds(
currentSegmentLength / totalSegmentLength * totalSegmentDuration.TotalMilliseconds));
}
}
}
