/// <summary>
/// Изменить сэмплинг данных на новый. Лучше использовать внешние средства
/// </summary>
public SonoBuilder Resample(int NewSampleRate)
{
SonoBuilder result = new SonoBuilder();
float coeff = ((float)NewSampleRate) / SampleRate;
int[] dataResult = new int[(int)(coeff * Data.Length)];
Resample(ref dataResult);
result.Data = dataResult;
result.SampleRate = NewSampleRate;
return result;
}
/// <summary>
/// Build footprints by sonoram
/// </summary>
/// <param name="Sono">Sonogram</param>
public static uint[] GetPrintsFromSono(float[][] Sono)
{
int halfDepth = Sono[0].Length;
const int Size = 33; // sizeof(uint) + 1;
// Get pows (summ of squares)
float[][] pows = new float[Sono.Length][];
float dfstep = halfDepth / Size, fstep = 0;
uint[] prints = new UInt32[pows.Length - 1];
for (int i = 0; i < Sono.Length; i++)
{
pows[i] = new float[Size];
fstep = 0;
for (int j = 0; j < Size; j++)
{
for (int k = (int)fstep; k < fstep + dfstep; k++)
{
pows[i][j] += Sono[i][k] * Sono[i][k];
}
fstep += dfstep;
}
}
#if DEFINE_OUTPUT
float[][] img = new float[pows.Length][];
for(int i=0;i<img.Length;i++) img[i] = new float[pows[0].Length];
#endif
//for (int i = 0; i < Size - 1; i++) pows[0][i] -= pows[0][i + 1];
for (int i = 1; i < pows.Length; i++)
{
uint key = 1, val = 0;
for (int j = 0; j < Size - 1; j++)
{
//pows[i][j] -= pows[i][j + 1];
if (pows[i - 1][j] > pows[i][j])
{
val |= key;
#if DEFINE_OUTPUT
img[i][j] = 255;
#endif
}
key <<= 1;
}
prints[i - 1] = val;
}
#if DEFINE_OUTPUT
SonoBuilder sono = new SonoBuilder();
Bitmap bmp = sono.FillBmp(img);
bmp.Save(DateTime.Now.ToShortDateString() + ".bmp");
#endif
return prints;
}
