mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-15 21:01:45 -05:00
94 lines
3.0 KiB
C++
94 lines
3.0 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2017 F4EXB //
|
|
// written by Edouard Griffiths //
|
|
// //
|
|
// This program is free software; you can redistribute it and/or modify //
|
|
// it under the terms of the GNU General Public License as published by //
|
|
// the Free Software Foundation as version 3 of the License, or //
|
|
// //
|
|
// This program is distributed in the hope that it will be useful, //
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
|
|
// GNU General Public License V3 for more details. //
|
|
// //
|
|
// You should have received a copy of the GNU General Public License //
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
|
|
///////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include "projector.h"
|
|
|
|
Projector::Projector(ProjectionType projectionType) :
|
|
m_projectionType(projectionType),
|
|
m_prevArg(0.0f),
|
|
m_cache(0),
|
|
m_cacheMaster(true)
|
|
{
|
|
}
|
|
|
|
Projector::~Projector()
|
|
{
|
|
}
|
|
|
|
Real Projector::run(const Sample& s)
|
|
{
|
|
Real v;
|
|
|
|
if ((m_cache) && !m_cacheMaster) {
|
|
return m_cache[(int) m_projectionType];
|
|
}
|
|
else
|
|
{
|
|
switch (m_projectionType)
|
|
{
|
|
case ProjectionImag:
|
|
v = s.m_imag / SDR_RX_SCALEF;
|
|
break;
|
|
case ProjectionMagLin:
|
|
{
|
|
Real re = s.m_real / SDR_RX_SCALEF;
|
|
Real im = s.m_imag / SDR_RX_SCALEF;
|
|
Real magsq = re*re + im*im;
|
|
v = std::sqrt(magsq);
|
|
}
|
|
break;
|
|
case ProjectionMagDB:
|
|
{
|
|
Real re = s.m_real / SDR_RX_SCALEF;
|
|
Real im = s.m_imag / SDR_RX_SCALEF;
|
|
Real magsq = re*re + im*im;
|
|
v = log10f(magsq) * 10.0f;
|
|
}
|
|
break;
|
|
case ProjectionPhase:
|
|
v = std::atan2((float) s.m_imag, (float) s.m_real) / M_PI;
|
|
break;
|
|
case ProjectionDPhase:
|
|
{
|
|
Real curArg = std::atan2((float) s.m_imag, (float) s.m_real);
|
|
Real dPhi = (curArg - m_prevArg) / M_PI;
|
|
m_prevArg = curArg;
|
|
|
|
if (dPhi < -1.0f) {
|
|
dPhi += 2.0f;
|
|
} else if (dPhi > 1.0f) {
|
|
dPhi -= 2.0f;
|
|
}
|
|
|
|
v = dPhi;
|
|
}
|
|
break;
|
|
case ProjectionReal:
|
|
default:
|
|
v = s.m_real / SDR_RX_SCALEF;
|
|
break;
|
|
}
|
|
|
|
if (m_cache) {
|
|
m_cache[(int) m_projectionType] = v;
|
|
}
|
|
|
|
return v;
|
|
}
|
|
}
|
|
|