private void drawSpectrum(Graphics g)
{
int numchannels = 0;
int dummy = 0;
FMOD.SOUND_FORMAT dummyformat = FMOD.SOUND_FORMAT.NONE;
FMOD.DSP_RESAMPLER dummyresampler = FMOD.DSP_RESAMPLER.LINEAR;
int count = 0;
int count2 = 0;
system.getSoftwareFormat(ref dummy, ref dummyformat, ref numchannels, ref dummy, ref dummyresampler, ref dummy);
/*
* DRAW SPECTRUM
*/
for (count = 0; count < numchannels; count++)
{
float max = 0;
system.getSpectrum(spectrum, SPECTRUMSIZE, count, FMOD.DSP_FFT_WINDOW.TRIANGLE);
for (count2 = 0; count2 < 255; count2++)
{
if (max < spectrum[count2])
{
max = spectrum[count2];
}
}
/*
* The upper band of frequencies at 44khz is pretty boring (ie 11-22khz), so we are only
* going to display the first 256 frequencies, or (0-11khz)
*/
for (count2 = 0; count2 < 255; count2++)
{
float height;
height = spectrum[count2] / max * GRAPHICWINDOW_HEIGHT;
if (height >= GRAPHICWINDOW_HEIGHT)
{
height = GRAPHICWINDOW_HEIGHT - 1;
}
if (height < 0)
{
height = 0;
}
height = GRAPHICWINDOW_HEIGHT - height;
g.FillRectangle(mBrushGreen, count2, height, 1.0f, GRAPHICWINDOW_HEIGHT - height);
}
}
}
public float[] getSpectrum(int size, int channel, DSP_FFT fft)
{
float[] data = new float[size];
switch (fft)
{
case DSP_FFT.RECT:
m_system.getSpectrum(data, size, channel, FMOD.DSP_FFT_WINDOW.RECT);
break;
case DSP_FFT.BLACKMAN:
m_system.getSpectrum(data, size, channel, FMOD.DSP_FFT_WINDOW.BLACKMAN);
break;
case DSP_FFT.BLACKMANHARRIS:
m_system.getSpectrum(data, size, channel, FMOD.DSP_FFT_WINDOW.BLACKMANHARRIS);
break;
case DSP_FFT.HAMMING:
m_system.getSpectrum(data, size, channel, FMOD.DSP_FFT_WINDOW.HAMMING);
break;
case DSP_FFT.HANNING:
m_system.getSpectrum(data, size, channel, FMOD.DSP_FFT_WINDOW.HANNING);
break;
case DSP_FFT.TRIANGLE:
m_system.getSpectrum(data, size, channel, FMOD.DSP_FFT_WINDOW.TRIANGLE);
break;
}
return(data);
}
