public IReporter <string> Compress(IFile target, IConfiguaration configuaration, Stream output, int width, int height)
{
var nextReporter = _next.Compress(target, configuaration, output, width, height);
return(new RoundingDigitsReporter(configuaration.Get <int>("roundingdecimals"), nextReporter));
}
/// <summary>
/// Readjusts the numbers so that they are easier to compress. Loses some precision (of course)
/// </summary>
/// <param name="numbers"></param>
/// <param name="config"></param>
public static void Round([NotNull] List <OfcNumber> numbers, [NotNull] IConfiguaration config)
{
if (numbers.Count < 2)
{
return;
}
if (!config.Has("RoundingMin") || !config.Has("RoundingMax") || !config.Has("RoundingEpsilon"))
{
throw new ArgumentException("Invalid config numbers (Rounding)");
}
var min = config.Get <double>("RoundingMin");
var max = config.Get <double>("RoundingMax");
if (min >= max)
{
throw new ArgumentException("Invalid config numbers");
}
var minOfc = OfcNumber.Parse(min.ToString(CultureInfo.InvariantCulture));
var maxOfc = OfcNumber.Parse(max.ToString(CultureInfo.InvariantCulture));
var epsilon = config.Get <double>("RoundingEpsilon");
var epsilonTwice = epsilon * 2d;
var epsilonOfc = OfcNumber.Parse(epsilon.ToString(CultureInfo.InvariantCulture));
var currentStart = 0;
var currentMin = numbers[0].Reconstructed;
var currentMax = currentMin;
var currentMaxOfc = numbers[0];
for (var i = 1; i < numbers.Count; i++)
{
var number = numbers[i];
var numberRec = number.Reconstructed;
if (numberRec < min)
{
numbers[i] = minOfc;
}
else if (numberRec > max)
{
numbers[i] = maxOfc;
}
if (numberRec > currentMax)
{
currentMax = numberRec;
if (numberRec - currentMin > epsilonTwice)
{
if (currentStart != i - 1)
{
AdjustNumbers(numbers, currentStart, i, currentMaxOfc, epsilonOfc);
}
currentStart = i;
currentMin = numberRec;
currentMaxOfc = number;
}
}
if (numberRec < currentMin)
{
currentMin = numberRec;
if (currentMax - numberRec > epsilonTwice)
{
if (currentStart != i - 1)
{
AdjustNumbers(numbers, currentStart, i, currentMaxOfc, epsilonOfc);
}
currentStart = i;
currentMax = numberRec;
currentMaxOfc = number;
}
}
}
//using (var writer = new StreamWriter(new FileStream(new Random().Next(0, 100) + "raw123.txt", FileMode.OpenOrCreate)))
//{
// for (var i = 0; i < numbers.Count; i++)
// {
// writer.WriteLine(numbers[i].Reconstructed);
// }
//}
}