public PowerSpectrumSignal(ref DSPBuffer dsp_buffer_obj)
{
this.d = dsp_buffer_obj;
this.s = d.State;
this.sample_rate = s.DSPSampleRate;
this.block_size = s.DSPBlockSize;
this.strobe_count = (int)this.sample_rate / (this.block_size * this.rate);
this.window = new float[s.DSPBlockSize];
this.ps_results = new float[s.DSPBlockSize * 2];
this.ps_average = new float[s.DSPBlockSize * 2];
this.filt_design = new FilterDesigner();
filt_design.makewindow(WindowType_e.BLACKMANHARRIS_WINDOW,
s.DSPBlockSize,
ref window);
this.ps_cpx = new CPX[s.DSPBlockSize * 2];
this.tmp_cpx = new CPX[s.DSPBlockSize * 2];
h_ps = GCHandle.Alloc(ps_cpx, GCHandleType.Pinned);
h_temp = GCHandle.Alloc(tmp_cpx, GCHandleType.Pinned);
// in: tmp_cpx_1 out: ps_cpx
plan_fwd_ps = FFTW.dft_1d(s.DSPBlockSize * 2,
h_temp.AddrOfPinnedObject(),
h_ps.AddrOfPinnedObject(),
FFTW.fftw_direction.Forward,
FFTW.fftw_flags.Measure);
}
public OutbandPowerSpectrumSignal(int nsize)
{
this.block_size = nsize;
this.window = new float[nsize];
this.ps_results = new float[nsize * 2];
this.ps_average = new float[nsize * 2];
this.filt_design = new FilterDesigner();
filt_design.makewindow(WindowType_e.BLACKMANHARRIS_WINDOW,
nsize,
ref window);
this.ps_cpx = new CPX[nsize * 2];
this.tmp_cpx = new CPX[nsize * 2];
h_ps = GCHandle.Alloc(ps_cpx, GCHandleType.Pinned);
h_temp = GCHandle.Alloc(tmp_cpx, GCHandleType.Pinned);
// in: tmp_cpx_1 out: ps_cpx
plan_fwd_ps = FFTW.dft_1d(nsize * 2,
h_temp.AddrOfPinnedObject(),
h_ps.AddrOfPinnedObject(),
FFTW.fftw_direction.Forward,
FFTW.fftw_flags.Measure);
}
public OutbandPowerSpectrumSignal(ref DSPBuffer dsp_buffer_obj, WindowType_e filterType)
{
this.d = dsp_buffer_obj;
this.s = d.State;
this.block_size = s.DSPBlockSize;
this.window = new float[s.DSPBlockSize];
this.ps_results = new float[s.DSPBlockSize * 2];
this.ps_average = new float[s.DSPBlockSize * 2];
this.filt_design = new FilterDesigner();
filt_design.makewindow(filterType,
s.DSPBlockSize,
ref window);
this.ps_cpx = new CPX[s.DSPBlockSize * 2];
this.tmp_cpx = new CPX[s.DSPBlockSize * 2];
h_ps = GCHandle.Alloc(ps_cpx, GCHandleType.Pinned);
h_temp = GCHandle.Alloc(tmp_cpx, GCHandleType.Pinned);
// in: tmp_cpx_1 out: ps_cpx
plan_fwd_ps = FFTW.dft_1d(s.DSPBlockSize * 2,
h_temp.AddrOfPinnedObject(),
h_ps.AddrOfPinnedObject(),
FFTW.fftw_direction.Forward,
FFTW.fftw_flags.Measure);
}
public void Exit() // destructor
{
FFTW.destroy_plan(plan_fwd_main);
FFTW.destroy_plan(plan_rev_main);
h_cpx.Free();
h_tmp1.Free();
h_tmp2.Free();
h_tmp3.Free();
}
public DSPBuffer(DSPState state)
{
this.State = state;
size = this.State.DSPBlockSize * 2;
audio_ring_buffer = new RingBuffer(size * 8);
cpx = new CPX[size];
tmp_cpx_1 = new CPX[size];
tmp_cpx_2 = new CPX[size];
tmp_cpx_3 = new CPX[size];
dec_cpx = new CPX[size / 2];
halfsize = size / 2;
leftside = 0;
rightside = halfsize;
scalefactor = (float)1.0f / size;
h_cpx = GCHandle.Alloc(cpx, GCHandleType.Pinned);
h_tmp1 = GCHandle.Alloc(tmp_cpx_1, GCHandleType.Pinned);
h_tmp2 = GCHandle.Alloc(tmp_cpx_2, GCHandleType.Pinned);
h_tmp3 = GCHandle.Alloc(tmp_cpx_3, GCHandleType.Pinned);
// in: cpx out: tmp_cpx_1
plan_fwd_main = FFTW.dft_1d(size,
h_cpx.AddrOfPinnedObject(),
h_tmp1.AddrOfPinnedObject(),
FFTW.fftw_direction.Forward,
FFTW.fftw_flags.Measure);
// in: tmp_cpx_2 out: tmp_cpx_3
plan_rev_main = FFTW.dft_1d(size,
h_tmp2.AddrOfPinnedObject(),
h_tmp3.AddrOfPinnedObject(),
FFTW.fftw_direction.Backward,
FFTW.fftw_flags.Measure);
this.stage = new int[State.DSPBlockSize];
this.index = 0;
for (int i = 0; i < State.OutputRateDivisor; i++)
{
stage[i] = (int)((double)State.DSPBlockSize * ((double)i / (double)State.OutputRateDivisor));
}
}
public Filter(ref DSPBuffer dsp_buffer_obj)
{
this.d = dsp_buffer_obj;
this.s = d.State;
this.ovlp_cpx = new CPX[s.DSPBlockSize];
this.filter_cpx = new CPX[s.DSPBlockSize * 2];
this.tmp_cpx = new CPX[s.DSPBlockSize * 2];
this.filter_designer = new FilterDesigner();
h_filter = GCHandle.Alloc(filter_cpx, GCHandleType.Pinned);
h_temp = GCHandle.Alloc(tmp_cpx, GCHandleType.Pinned);
// in: tmp_cpx out: filter_cpx
plan_fwd_filter = FFTW.dft_1d(s.DSPBlockSize * 2,
h_temp.AddrOfPinnedObject(),
h_filter.AddrOfPinnedObject(),
FFTW.fftw_direction.Forward,
FFTW.fftw_flags.Measure);
}
internal void DoFFTReverseMain()
{
FFTW.execute(plan_rev_main);
}
internal void DoFFTForwardMain()
{
FFTW.execute(plan_fwd_main);
}
public void Exit()
{
FFTW.destroy_plan(plan_fwd_filter);
h_filter.Free();
h_temp.Free();
}
internal void DoFFTForwardFilter()
{
FFTW.execute(plan_fwd_filter);
}
private void DoFFTForwardPS()
{
FFTW.execute(plan_fwd_ps);
}
public void Exit()
{
FFTW.destroy_plan(plan_fwd_ps);
h_ps.Free();
h_temp.Free();
}