public int NextSlowFrame(int startIndex)
{
if (SlowFrames.Count == 0 || startIndex >= Frames.Count - 1)
{
return(-1);
}
if (startIndex >= SlowFrames.Last().FrameIndex)
{
return(-1);
}
Debug.Assert(startIndex <= Frames.Count);
var index = SlowFrames.BinarySearch(startIndex, f => f.FrameIndex);
if (index < 0)
{
index = (-index) - 1;
}
return(SlowFrames[index + 1].FrameIndex);
}
public int PrevSlowFrame(int startIndex)
{
if (startIndex == 0 || SlowFrames.Count == 0 || startIndex >= Frames.Count - 1)
{
return(-1);
}
if (startIndex <= SlowFrames[0].FrameIndex)
{
return(-1);
}
Debug.Assert(startIndex <= Frames.Count);
var index = SlowFrames.BinarySearch(startIndex - 1, f => f.FrameIndex);
if (index < 0)
{
index = -index;
}
if (SlowFrames[index].FrameIndex == startIndex)
{
index--;
}
return(index >= 0 ? SlowFrames[index].FrameIndex : -1);
}