sdrangel/sdrbase/dsp/decimatorsff.cpp

213 wiersze
6.4 KiB
C++

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2018 Edouard Griffiths, F4EXB //
// //
// 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 //
// (at your option) any later version. //
// //
// 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 "decimatorsff.h"
template<>
SDRBASE_API void DecimatorsFF<true>::decimate1(FSampleVector::iterator* it, const float* buf, qint32 nbIAndQ)
{
float xreal, yimag;
for (int pos = 0; pos < nbIAndQ - 1; pos += 2)
{
xreal = buf[pos+0];
yimag = buf[pos+1];
(**it).setReal(xreal);
(**it).setImag(yimag);
++(*it); // Valgrind optim (comment not repeated)
}
}
template<>
SDRBASE_API void DecimatorsFF<false>::decimate1(FSampleVector::iterator* it, const float* buf, qint32 nbIAndQ)
{
float xreal, yimag;
for (int pos = 0; pos < nbIAndQ - 1; pos += 2)
{
xreal = buf[pos+1];
yimag = buf[pos+0];
(**it).setReal(xreal);
(**it).setImag(yimag);
++(*it); // Valgrind optim (comment not repeated)
}
}
template<>
void DecimatorsFF<true>::decimate2_inf(FSampleVector::iterator* it, const float* buf, qint32 nbIAndQ)
{
float xreal, yimag;
for (int pos = 0; pos < nbIAndQ - 7; pos += 8)
{
xreal = (buf[pos+0] - buf[pos+3]);
yimag = (buf[pos+1] + buf[pos+2]);
(**it).setReal(xreal);
(**it).setImag(yimag);
++(*it);
xreal = (buf[pos+7] - buf[pos+4]);
yimag = (- buf[pos+5] - buf[pos+6]);
(**it).setReal(xreal);
(**it).setImag(yimag);
++(*it);
}
}
template<>
void DecimatorsFF<false>::decimate2_inf(FSampleVector::iterator* it, const float* buf, qint32 nbIAndQ)
{
float xreal, yimag;
for (int pos = 0; pos < nbIAndQ - 7; pos += 8)
{
xreal = (buf[pos+1] + buf[pos+2]);
yimag = (buf[pos+0] - buf[pos+3]);
(**it).setReal(xreal);
(**it).setImag(yimag);
++(*it);
xreal = (- buf[pos+5] - buf[pos+6]);
yimag = (buf[pos+7] - buf[pos+4]);
(**it).setReal(xreal);
(**it).setImag(yimag);
++(*it);
}
}
template<>
void DecimatorsFF<true>::decimate2_sup(FSampleVector::iterator* it, const float* buf, qint32 nbIAndQ)
{
float xreal, yimag;
for (int pos = 0; pos < nbIAndQ - 7; pos += 8)
{
xreal = (buf[pos+1] - buf[pos+2]);
yimag = (- buf[pos+0] - buf[pos+3]);
(**it).setReal(xreal);
(**it).setImag(yimag);
++(*it);
xreal = (buf[pos+6] - buf[pos+5]);
yimag = (buf[pos+4] + buf[pos+7]);
(**it).setReal(xreal);
(**it).setImag(yimag);
++(*it);
}
}
template<>
void DecimatorsFF<false>::decimate2_sup(FSampleVector::iterator* it, const float* buf, qint32 nbIAndQ)
{
float xreal, yimag;
for (int pos = 0; pos < nbIAndQ - 7; pos += 8)
{
xreal = (- buf[pos+0] - buf[pos+3]);
yimag = (buf[pos+1] - buf[pos+2]);
(**it).setReal(xreal);
(**it).setImag(yimag);
++(*it);
xreal = (buf[pos+4] + buf[pos+7]);
yimag = (buf[pos+6] - buf[pos+5]);
(**it).setReal(xreal);
(**it).setImag(yimag);
++(*it);
}
}
template<>
void DecimatorsFF<true>::decimate4_inf(FSampleVector::iterator* it, const float* buf, qint32 nbIAndQ)
{
float xreal, yimag;
for (int pos = 0; pos < nbIAndQ - 7; pos += 8)
{
xreal = (buf[pos+0] - buf[pos+3] + buf[pos+7] - buf[pos+4]);
yimag = (buf[pos+1] - buf[pos+5] + buf[pos+2] - buf[pos+6]);
(**it).setReal(xreal);
(**it).setImag(yimag);
++(*it);
}
}
template<>
void DecimatorsFF<false>::decimate4_inf(FSampleVector::iterator* it, const float* buf, qint32 nbIAndQ)
{
float xreal, yimag;
for (int pos = 0; pos < nbIAndQ - 7; pos += 8)
{
xreal = (buf[pos+1] - buf[pos+5] + buf[pos+2] - buf[pos+6]);
yimag = (buf[pos+0] - buf[pos+3] + buf[pos+7] - buf[pos+4]);
(**it).setReal(xreal);
(**it).setImag(yimag);
++(*it);
}
}
template<>
void DecimatorsFF<true>::decimate4_sup(FSampleVector::iterator* it, const float* buf, qint32 nbIAndQ)
{
// Sup (USB):
// x y x y x y x y / x -> 1,-2,-5,6 / y -> -0,-3,4,7
// [ rotate: 1, 0, -2, 3, -5, -4, 6, -7]
// Inf (LSB):
// x y x y x y x y / x -> 0,-3,-4,7 / y -> 1,2,-5,-6
// [ rotate: 0, 1, -3, 2, -4, -5, 7, -6]
float xreal, yimag;
for (int pos = 0; pos < nbIAndQ - 7; pos += 8)
{
xreal = (buf[pos+1] - buf[pos+2] - buf[pos+5] + buf[pos+6]);
yimag = (- buf[pos+0] - buf[pos+3] + buf[pos+4] + buf[pos+7]);
(**it).setReal(xreal);
(**it).setImag(yimag);
++(*it);
}
}
template<>
void DecimatorsFF<false>::decimate4_sup(FSampleVector::iterator* it, const float* buf, qint32 nbIAndQ)
{
// Sup (USB):
// x y x y x y x y / x -> 1,-2,-5,6 / y -> -0,-3,4,7
// [ rotate: 1, 0, -2, 3, -5, -4, 6, -7]
// Inf (LSB):
// x y x y x y x y / x -> 0,-3,-4,7 / y -> 1,2,-5,-6
// [ rotate: 0, 1, -3, 2, -4, -5, 7, -6]
float xreal, yimag;
for (int pos = 0; pos < nbIAndQ - 7; pos += 8)
{
xreal = (- buf[pos+0] - buf[pos+3] + buf[pos+4] + buf[pos+7]);
yimag = (buf[pos+1] - buf[pos+2] - buf[pos+5] + buf[pos+6]);
(**it).setReal(xreal);
(**it).setImag(yimag);
++(*it);
}
}