void FFT::Init(int samples_in, int samples_out, int bEqualize, float envelope_power)
{
    // samples_in: # of waveform samples you'll feed into the FFT
    // samples_out: # of frequency samples you want out; MUST BE A POWER OF 2.

    CleanUp();

    m_samples_in = samples_in;
    NFREQ = samples_out*2;

    InitBitRevTable();
    InitCosSinTable();
    if (envelope_power > 0)
        InitEnvelopeTable(envelope_power);
    if (bEqualize)
        InitEqualizeTable();
    temp1 = new float[NFREQ];
    temp2 = new float[NFREQ];
}
Exemplo n.º 2
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void FFT::Init(int samples_in, int samples_out, int bEqualize, float envelope_power)
{
    // samples_in: # of waveform samples you'll feed into the FFT
    // samples_out: # of frequency samples you want out; MUST BE A POWER OF 2.
    // bEqualize: set to 1 if you want the magnitude of the basses and trebles
    //   to be roughly equalized; 0 to leave them untouched.
    // envelope_power: set to -1 to disable the envelope; otherwise, specify
    //   the envelope power you want here.  See InitEnvelopeTable for more info.

    CleanUp();

    m_samples_in = samples_in;
    NFREQ = samples_out*2;

    InitBitRevTable();
    InitCosSinTable();
    if (envelope_power > 0)
        InitEnvelopeTable(envelope_power);
    if (bEqualize)
        InitEqualizeTable();
    temp1 = new float[NFREQ];
    temp2 = new float[NFREQ];
}