//public async Task<MPoints> ZoomOutAsync(int position, int quantityPointsInput, int quantityPointsOutput)
//{
// if (quantityPointsOutput % 2 != 0) throw new Exception("Количество точек на выходе должно быть четным");
// int blockSize = quantityPointsInput / quantityPointsOutput; //размер блока
// int quantityBlocks = quantityPointsOutput; //количество блоков
// //TODO:добавить конечный блок
// //if (quantityPointsInput % quantityPointsOutput != 0) quantityBlocks += 1;
// var tasks = new Task<MPoints>[quantityBlocks];
// for (int i = 0; i < quantityBlocks; i++)
// {
// tasks[i] = Task.Run(() => Decrease(position + (i * blockSize), quantityBlocks, factor));
// }
// var result = await Task.WhenAll(tasks);
// MPoints mPointsOut = new MPoints(quantityPointsOutput);
// for (int i = 0; i < result.Length; i++)
// {
// //TODO: если размеры результата разные то будет ошибка
// mPointsOut.Add(i * result[i].Length, result[i]);
// }
// return mPointsOut;
//}
public async Task <MPoints> DecreaseAsync(int position, int quantityPointsInput, int quantityPointsOutput)
{
if (quantityPointsOutput % 2 != 0)
{
throw new Exception("Количество точек на выходе должно быть четным");
}
int blockSize = quantityPointsInput / quantityPointsOutput; //размер блока
int quantityBlocks = quantityPointsOutput; //количество блоков
//TODO:добавить конечный блок
//if (quantityPointsInput % quantityPointsOutput != 0) quantityBlocks += 1;
int quantityPairPointsOut = quantityBlocks / 2; //количество пар точек
MPoints mPOut = new MPoints(quantityBlocks);
var tasks = new Task <MPoints> [quantityPairPointsOut];
for (int i = 0; i < quantityPairPointsOut; i++)
{
tasks[i] = BlockDecreaseAsync(position + i * blockSize, blockSize);
}
MPoints[] result = await Task.WhenAll(tasks);
for (int i = 0; i < quantityPairPointsOut; i++)
{
mPOut.Insert(i * 2, result[i]);
}
//GC.Collect();
return(mPOut);
}
public void Insert(int index, MPoints mPoints)
{
mPoints.X.CopyTo(X, index);
for (int i = 0; i < Y.Length; i++)
{
mPoints.Y[i].Value.CopyTo(Y[i].Value, index);
}
}
public MPoints Decode(MemoryStream memoryStream)
{
List <MPoint> mPoints = new List <MPoint>();
while (true)
{
if (PSP.Decode(memoryStream, ref package) == true)
{
break;
}
MPoint mPoint = new MPoint();
DateTime dateTime = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
dateTime = dateTime.AddSeconds(package.Item[0].Value);
dateTime = dateTime.AddMilliseconds(package.Item[1].Value);
mPoint.X = dateTime;
for (int i = 0; i < mPoint.Y.Length; i++)
{
mPoint.Y[i] = (int)package.Item[i + 2].Value;
}
;
mPoints.Add(mPoint);
}
//Debug.Print(mPoints.Count.ToString());
if (mPoints.Count == 0)
{
return(null);
}
MPoints points = new MPoints(mPoints.Count);
for (int i = 0; i < mPoints.Count; i++)
{
points[i] = mPoints[i];
}
return(points);
}
private async Task <MPoints> BlockDecreaseAsync(int position, int blockSize)
{
return(await Task.Run(() =>
{
using (FileStream fs = File.OpenRead(fileName))
{
//StreamDecoding sd = new StreamDecoding(fs);
MPoints mPointsOut = new MPoints(2);
MPoints mPointsBlock;
//Создание блока из потока
//mPointsBlock = sd.DecodingBlock(blockSize, position);
//StreamControl sc = new StreamControl();
//sc.SeleсtStream(fs);
//var s = sc.ReadStream(blockSize, position);
PackagePSP package = new PackagePSP(new PackagePSPStructure(StartBit.ZERO, 32, 10, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12));
List <MPoint> mPoints = new List <MPoint>();
while (true)
{
// if (PSP.Decode(s, ref package) == true) break;
MPoint mPoint = new MPoint();
DateTime dateTime = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
dateTime = dateTime.AddSeconds(package.Item[0].Value);
dateTime = dateTime.AddMilliseconds(package.Item[1].Value);
mPoint.X = dateTime;
for (int i = 0; i < mPoint.Y.Length; i++)
{
mPoint.Y[i] = (int)package.Item[i + 2].Value;
}
;
mPoints.Add(mPoint);
}
//Debug.Print(mPoints.Count.ToString());
if (mPoints.Count == 0)
{
return null;
}
MPoints points = new MPoints(mPoints.Count);
for (int i = 0; i < mPoints.Count; i++)
{
points[i] = mPoints[i];
}
//Выборка первой и последней даты в блоке
mPointsOut.X[0] = points.X.First();
mPointsOut.X[1] = points.X.Last();
//Выборка минимальных и максимальных Y значений
for (int g = 0; g < mPointsOut.Y.Length; g++)
{
mPointsOut.Y[g].Value[0] = points.Y[g].Value.Min();
mPointsOut.Y[g].Value[1] = points.Y[g].Value.Max();
}
return mPointsOut;
}
}
));
}
