private void FormMain_Load(object sender, EventArgs e)
{
_waveformBitmap = new DirectBitmap(pictureBoxWaveform.Width, pictureBoxWaveform.Height);
_spectrumBitmap = new DirectBitmap(pictureBoxRealtimeSpectrum.Width, pictureBoxRealtimeSpectrum.Height);
_volumeBitmap = new DirectBitmap(pictureBoxVolume.Width, pictureBoxVolume.Height);
_trueVolumeProvider = new TrueVolumeProvider();
SetPlayerProvider();
SetFFTProvider();
SetVolumeDrawer();
SetSpectrumDrawer();
FileLoader.OnBeginMp3Decompression += () => { SetLabelStatusText("Begin Mp3 Decompression"); };
FileLoader.OnBeginWavWriting += () => { SetLabelStatusText("Begin Wav Writing"); };
Application.Idle += OnApplicationIdle;
//выводим коэффициенты на форму
numericUpDownEasing.Value = (int)(EasingCoef * 10);
numericUpDownPow2Spectrum.Value = FastPowLog2Provider.FastLog2(SpectrumUseSamples);
trackBarTrimFrequency.Value = TrimFrequency;
checkBoxApplyTimeThinning.Checked = ApplyTimeThinning;
labelMaxFrequency.Text = "Max Frequency: " + TrimFrequency;
}
protected override void Algorithm()
{
int power = FastPowLog2Provider.FastLog2(Samples);
int middle = Samples >> 1;
int j = 0;
for (int i = 0; i < Samples - 1; i++)
{
if (i < j)
{
var tmp = ValuesBuffer[i];
ValuesBuffer[i] = ValuesBuffer[j];
ValuesBuffer[j] = tmp;
}
int k = middle;
while (k <= j)
{
j -= k;
k >>= 1;
}
j += k;
}
r.Re = -1;
r.Im = 0;
int l2 = 1;
for (int l = 0; l < power; l++)
{
int l1 = l2;
l2 <<= 1;
r2.Re = 1;
r2.Im = 0;
for (int n = 0; n < l1; n++)
{
for (int i = n; i < Samples; i += l2)
{
int i1 = i + l1;
Complex tmp = r2 * ValuesBuffer[i1];
ValuesBuffer[i1] = ValuesBuffer[i] - tmp;
ValuesBuffer[i] += tmp;
}
r2 = r2 * r;
}
r.Im = -Math.Sqrt((1 - r.Re) / 2d);
r.Re = Math.Sqrt((1 + r.Re) / 2d);
}
}
//обработка изменения степени двойки количества сэмплов на обработку спектра
private void numericUpDownPow2Spectrum_ValueChanged(object sender, EventArgs e)
{
SpectrumUseSamples = FastPowLog2Provider.FastPow2((int)numericUpDownPow2Spectrum.Value);
SetFFTProvider();
//SetSpectrumDrawer();
if (_currentWavFileData != null)
{
SetSpectrumDiagramDrawer();
}
}
private void InitAllCache()
{
int base2 = FastPowLog2Provider.FastLog2(Samples);
_cacheLevels = new Complex[base2 + 1][];
int samples = Samples;
while (base2 > 0)
{
Complex[] cache = new Complex[samples];
for (int i = 0; i < samples; i++)
{
cache[i] = W(i, samples);
}
_cacheLevels[base2] = cache;
base2--;
samples /= 2;
}
}
protected override Complex W(int x, int n)
{
int base2 = FastPowLog2Provider.FastLog2(n);
return(_cacheLevels[base2][x]);
}
