/// <summary>
/// 返回语谱图，语谱图是一个二维数组，大小为frameSize*frameSize
/// </summary>
/// <param name="stereos"></param>
/// <returns></returns>
public WaveMap GetSpectrogram(List <Stereo> stereos, float shiftNumber = 0, float deviation = 0, float threshold = 0)
{
if (stereos == null)
{
Console.WriteLine("ConsoleMorphVOXPro.WaveDeal.Spectrogram->GetSpectrogram");
return(null);
}
int startNumber = 0;
int wavMapLength = (frameSize / 2) * frameSize - frameZip * (frameSize / 2 - 1);
float[,] spectrogramLMap = new float[mapSize, mapSize];
float[,] spectrogramRMap = new float[mapSize, mapSize];
int test = 0;
//最后一帧舍弃
for (int i = 0; i < mapSize && frameSize + startNumber <= stereos.Count; i++)
{
Complex[] complicesL = new Complex[frameSize];
Complex[] complicesR = new Complex[frameSize];
for (int j = 0; j < frameSize; j++)
{
double hamm = Hamming(j, frameSize);
complicesL[j] = new Complex(stereos[j + startNumber].Left * hamm, 0);
complicesR[j] = new Complex(stereos[j + startNumber].Right * hamm, 0);
}
double[] spectrumMapL = GetSpectrum(complicesL);
double[] spectrumMapR = GetSpectrum(complicesR);
int setPosition = (mapSize - frameSize / 2) / 2;
for (int j = 0; j < frameSize / 2; j++)
{
spectrogramLMap[i, j + setPosition] = (float)spectrumMapL[j];
spectrogramRMap[i, j + setPosition] = (float)spectrumMapR[j];
}
startNumber = startNumber + frameSize - frameZip;
test++;
}
WaveMap waveMap = new WaveMap
{
LeftSpectrogram = spectrogramLMap,
RightSpectrogram = spectrogramRMap,
ShiftNumber = shiftNumber,
Threshold = threshold,
Deviation = deviation
};
return(waveMap);
//---------------//----------------//Test:
//startNumber+ wavMapLength < stereos.Count//原先的表达式
//大于一半就能用
//List<WaveMap> waveMaps = new List<WaveMap>();
//while (startNumber+ wavMapLength <= stereos.Count)
//{
// float[,] spectrogramLMap = new float[frameSize / 2, frameSize / 2];
// float[,] spectrogramRMap = new float[frameSize / 2, frameSize / 2];
// for (int i = 0; i < frameSize / 2; i++)
// {
// Complex[] complicesL = new Complex[frameSize];
// Complex[] complicesR = new Complex[frameSize];
// double []test1=new double[frameSize];
// for (int j = 0; j < frameSize; j++)
// {
// test1[j] = stereos[j + startNumber].Left;
// complicesL[j] = new Complex(stereos[j + startNumber].Left * Hamming(j, frameSize), 0);
// complicesR[j] = new Complex(stereos[j + startNumber].Right * Hamming(j, frameSize), 0);
// }
// double[] spectrumMapL = GetSpectrum(complicesL);
// double[] spectrumMapR = GetSpectrum(complicesR);
// for (int j = 0; j < frameSize / 2; j++)
// {
// spectrogramLMap[i, j] = (float)spectrumMapL[j];
// spectrogramRMap[i, j] = (float)spectrumMapR[j];
// }
// startNumber = startNumber + frameSize - frameZip;
// }
// WaveMap waveMap = new WaveMap
// {
// LeftSpectrogram = spectrogramLMap,
// RightSpectrogram = spectrogramRMap,
// ShiftNumber = shiftNumber,
// Threshold = threshold,
// Deviation = deviation
// };
// waveMaps.Add(waveMap);
//}
//return waveMaps;
}