mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-05 16:31:15 -05:00
639 lines
18 KiB
C++
639 lines
18 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2016 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/>. //
|
|
///////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef INCLUDE_INTHALFBANDFILTER_H
|
|
#define INCLUDE_INTHALFBANDFILTER_H
|
|
|
|
#include <stdint.h>
|
|
#include "dsp/dsptypes.h"
|
|
#include "dsp/hbfiltertraits.h"
|
|
#include "util/export.h"
|
|
|
|
template<uint32_t HBFilterOrder>
|
|
class SDRANGEL_API IntHalfbandFilter {
|
|
public:
|
|
IntHalfbandFilter();
|
|
|
|
// downsample by 2, return center part of original spectrum
|
|
bool workDecimateCenter(Sample* sample)
|
|
{
|
|
// insert sample into ring-buffer
|
|
m_samples[m_ptr][0] = sample->real();
|
|
m_samples[m_ptr][1] = sample->imag();
|
|
|
|
switch(m_state)
|
|
{
|
|
case 0:
|
|
// advance write-pointer
|
|
m_ptr = (m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder) % (HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1);
|
|
|
|
// next state
|
|
m_state = 1;
|
|
|
|
// tell caller we don't have a new sample
|
|
return false;
|
|
|
|
default:
|
|
// save result
|
|
doFIR(sample);
|
|
|
|
// advance write-pointer
|
|
m_ptr = (m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder) % (HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1);
|
|
|
|
// next state
|
|
m_state = 0;
|
|
|
|
// tell caller we have a new sample
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// upsample by 2, return center part of original spectrum
|
|
bool workInterpolateCenter(Sample* sampleIn, Sample *SampleOut)
|
|
{
|
|
switch(m_state)
|
|
{
|
|
case 0:
|
|
// insert sample into ring-buffer
|
|
m_samples[m_ptr][0] = 0;
|
|
m_samples[m_ptr][1] = 0;
|
|
|
|
// save result
|
|
doFIR(SampleOut);
|
|
|
|
// advance write-pointer
|
|
m_ptr = (m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder) % (HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1);
|
|
|
|
// next state
|
|
m_state = 1;
|
|
|
|
// tell caller we didn't consume the sample
|
|
return false;
|
|
|
|
default:
|
|
// insert sample into ring-buffer
|
|
m_samples[m_ptr][0] = sampleIn->real();
|
|
m_samples[m_ptr][1] = sampleIn->imag();
|
|
|
|
// save result
|
|
doFIR(SampleOut);
|
|
|
|
// advance write-pointer
|
|
m_ptr = (m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder) % (HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1);
|
|
|
|
// next state
|
|
m_state = 0;
|
|
|
|
// tell caller we consumed the sample
|
|
return true;
|
|
}
|
|
}
|
|
|
|
bool workDecimateCenter(qint32 *x, qint32 *y)
|
|
{
|
|
// insert sample into ring-buffer
|
|
m_samples[m_ptr][0] = *x;
|
|
m_samples[m_ptr][1] = *y;
|
|
|
|
switch(m_state)
|
|
{
|
|
case 0:
|
|
// advance write-pointer
|
|
m_ptr = (m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder) % (HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1);
|
|
|
|
// next state
|
|
m_state = 1;
|
|
|
|
// tell caller we don't have a new sample
|
|
return false;
|
|
|
|
default:
|
|
// save result
|
|
doFIR(x, y);
|
|
|
|
// advance write-pointer
|
|
m_ptr = (m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder) % (HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1);
|
|
|
|
// next state
|
|
m_state = 0;
|
|
|
|
// tell caller we have a new sample
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// downsample by 2, return edges of spectrum rotated into center - unused
|
|
// bool workDecimateFullRotate(Sample* sample)
|
|
// {
|
|
// switch(m_state)
|
|
// {
|
|
// case 0:
|
|
// // insert sample into ring-buffer
|
|
// m_samples[m_ptr][0] = sample->real();
|
|
// m_samples[m_ptr][1] = sample->imag();
|
|
//
|
|
// // advance write-pointer
|
|
// m_ptr = (m_ptr + HB_FILTERORDER) % (HB_FILTERORDER + 1);
|
|
//
|
|
// // next state
|
|
// m_state = 1;
|
|
//
|
|
// // tell caller we don't have a new sample
|
|
// return false;
|
|
//
|
|
// default:
|
|
// // insert sample into ring-buffer
|
|
// m_samples[m_ptr][0] = -sample->real();
|
|
// m_samples[m_ptr][1] = sample->imag();
|
|
//
|
|
// // save result
|
|
// doFIR(sample);
|
|
//
|
|
// // advance write-pointer
|
|
// m_ptr = (m_ptr + HB_FILTERORDER) % (HB_FILTERORDER + 1);
|
|
//
|
|
// // next state
|
|
// m_state = 0;
|
|
//
|
|
// // tell caller we have a new sample
|
|
// return true;
|
|
// }
|
|
// }
|
|
|
|
// downsample by 2, return lower half of original spectrum
|
|
bool workDecimateLowerHalf(Sample* sample)
|
|
{
|
|
switch(m_state)
|
|
{
|
|
case 0:
|
|
// insert sample into ring-buffer
|
|
m_samples[m_ptr][0] = -sample->imag();
|
|
m_samples[m_ptr][1] = sample->real();
|
|
|
|
// advance write-pointer
|
|
m_ptr = (m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder) % (HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1);
|
|
|
|
// next state
|
|
m_state = 1;
|
|
|
|
// tell caller we don't have a new sample
|
|
return false;
|
|
|
|
case 1:
|
|
// insert sample into ring-buffer
|
|
m_samples[m_ptr][0] = -sample->real();
|
|
m_samples[m_ptr][1] = -sample->imag();
|
|
|
|
// save result
|
|
doFIR(sample);
|
|
|
|
// advance write-pointer
|
|
m_ptr = (m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder) % (HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1);
|
|
|
|
// next state
|
|
m_state = 2;
|
|
|
|
// tell caller we have a new sample
|
|
return true;
|
|
|
|
case 2:
|
|
// insert sample into ring-buffer
|
|
m_samples[m_ptr][0] = sample->imag();
|
|
m_samples[m_ptr][1] = -sample->real();
|
|
|
|
// advance write-pointer
|
|
m_ptr = (m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder) % (HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1);
|
|
|
|
// next state
|
|
m_state = 3;
|
|
|
|
// tell caller we don't have a new sample
|
|
return false;
|
|
|
|
default:
|
|
// insert sample into ring-buffer
|
|
m_samples[m_ptr][0] = sample->real();
|
|
m_samples[m_ptr][1] = sample->imag();
|
|
|
|
// save result
|
|
doFIR(sample);
|
|
|
|
// advance write-pointer
|
|
m_ptr = (m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder) % (HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1);
|
|
|
|
// next state
|
|
m_state = 0;
|
|
|
|
// tell caller we have a new sample
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// upsample by 2, from lower half of original spectrum
|
|
bool workInterpolateLowerHalf(Sample* sampleIn, Sample *sampleOut)
|
|
{
|
|
Sample s;
|
|
|
|
switch(m_state)
|
|
{
|
|
case 0:
|
|
// insert sample into ring-buffer
|
|
m_samples[m_ptr][0] = 0;
|
|
m_samples[m_ptr][1] = 0;
|
|
|
|
// save result
|
|
doFIR(&s);
|
|
sampleOut->setReal(s.imag());
|
|
sampleOut->setImag(-s.real());
|
|
|
|
// advance write-pointer
|
|
m_ptr = (m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder) % (HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1);
|
|
|
|
// next state
|
|
m_state = 1;
|
|
|
|
// tell caller we didn't consume the sample
|
|
return false;
|
|
|
|
case 1:
|
|
// insert sample into ring-buffer
|
|
m_samples[m_ptr][0] = sampleIn->real();
|
|
m_samples[m_ptr][1] = sampleIn->imag();
|
|
|
|
// save result
|
|
doFIR(&s);
|
|
sampleOut->setReal(-s.real());
|
|
sampleOut->setImag(-s.imag());
|
|
|
|
// advance write-pointer
|
|
m_ptr = (m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder) % (HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1);
|
|
|
|
// next state
|
|
m_state = 2;
|
|
|
|
// tell caller we consumed the sample
|
|
return true;
|
|
|
|
case 2:
|
|
// insert sample into ring-buffer
|
|
m_samples[m_ptr][0] = 0;
|
|
m_samples[m_ptr][1] = 0;
|
|
|
|
// save result
|
|
doFIR(&s);
|
|
sampleOut->setReal(-s.imag());
|
|
sampleOut->setImag(s.real());
|
|
|
|
// advance write-pointer
|
|
m_ptr = (m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder) % (HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1);
|
|
|
|
// next state
|
|
m_state = 3;
|
|
|
|
// tell caller we didn't consume the sample
|
|
return false;
|
|
|
|
default:
|
|
// insert sample into ring-buffer
|
|
m_samples[m_ptr][0] = sampleIn->real();
|
|
m_samples[m_ptr][1] = sampleIn->imag();
|
|
|
|
// save result
|
|
doFIR(&s);
|
|
sampleOut->setReal(s.real());
|
|
sampleOut->setImag(s.imag());
|
|
|
|
// advance write-pointer
|
|
m_ptr = (m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder) % (HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1);
|
|
|
|
// next state
|
|
m_state = 0;
|
|
|
|
// tell caller we consumed the sample
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// downsample by 2, return upper half of original spectrum
|
|
bool workDecimateUpperHalf(Sample* sample)
|
|
{
|
|
switch(m_state)
|
|
{
|
|
case 0:
|
|
// insert sample into ring-buffer
|
|
m_samples[m_ptr][0] = sample->imag();
|
|
m_samples[m_ptr][1] = -sample->real();
|
|
|
|
// advance write-pointer
|
|
m_ptr = (m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder) % (HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1);
|
|
|
|
// next state
|
|
m_state = 1;
|
|
|
|
// tell caller we don't have a new sample
|
|
return false;
|
|
|
|
case 1:
|
|
// insert sample into ring-buffer
|
|
m_samples[m_ptr][0] = -sample->real();
|
|
m_samples[m_ptr][1] = -sample->imag();
|
|
|
|
// save result
|
|
doFIR(sample);
|
|
|
|
// advance write-pointer
|
|
m_ptr = (m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder) % (HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1);
|
|
|
|
// next state
|
|
m_state = 2;
|
|
|
|
// tell caller we have a new sample
|
|
return true;
|
|
|
|
case 2:
|
|
// insert sample into ring-buffer
|
|
m_samples[m_ptr][0] = -sample->imag();
|
|
m_samples[m_ptr][1] = sample->real();
|
|
|
|
// advance write-pointer
|
|
m_ptr = (m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder) % (HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1);
|
|
|
|
// next state
|
|
m_state = 3;
|
|
|
|
// tell caller we don't have a new sample
|
|
return false;
|
|
|
|
default:
|
|
// insert sample into ring-buffer
|
|
m_samples[m_ptr][0] = sample->real();
|
|
m_samples[m_ptr][1] = sample->imag();
|
|
|
|
// save result
|
|
doFIR(sample);
|
|
|
|
// advance write-pointer
|
|
m_ptr = (m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder) % (HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1);
|
|
|
|
// next state
|
|
m_state = 0;
|
|
|
|
// tell caller we have a new sample
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// upsample by 2, move original spectrum to upper half
|
|
bool workInterpolateUpperHalf(Sample* sampleIn, Sample *sampleOut)
|
|
{
|
|
Sample s;
|
|
|
|
switch(m_state)
|
|
{
|
|
case 0:
|
|
// insert sample into ring-buffer
|
|
m_samples[m_ptr][0] = 0;
|
|
m_samples[m_ptr][1] = 0;
|
|
|
|
// save result
|
|
doFIR(&s);
|
|
sampleOut->setReal(-s.imag());
|
|
sampleOut->setImag(s.real());
|
|
|
|
// advance write-pointer
|
|
m_ptr = (m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder) % (HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1);
|
|
|
|
// next state
|
|
m_state = 1;
|
|
|
|
// tell caller we didn't consume the sample
|
|
return false;
|
|
|
|
case 1:
|
|
// insert sample into ring-buffer
|
|
m_samples[m_ptr][0] = sampleIn->real();
|
|
m_samples[m_ptr][1] = sampleIn->imag();
|
|
|
|
// save result
|
|
doFIR(&s);
|
|
sampleOut->setReal(-s.real());
|
|
sampleOut->setImag(-s.imag());
|
|
|
|
// advance write-pointer
|
|
m_ptr = (m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder) % (HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1);
|
|
|
|
// next state
|
|
m_state = 2;
|
|
|
|
// tell caller we consumed the sample
|
|
return true;
|
|
|
|
case 2:
|
|
// insert sample into ring-buffer
|
|
m_samples[m_ptr][0] = 0;
|
|
m_samples[m_ptr][1] = 0;
|
|
|
|
// save result
|
|
doFIR(&s);
|
|
sampleOut->setReal(s.imag());
|
|
sampleOut->setImag(-s.real());
|
|
|
|
// advance write-pointer
|
|
m_ptr = (m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder) % (HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1);
|
|
|
|
// next state
|
|
m_state = 3;
|
|
|
|
// tell caller we didn't consume the sample
|
|
return false;
|
|
|
|
default:
|
|
// insert sample into ring-buffer
|
|
m_samples[m_ptr][0] = sampleIn->real();
|
|
m_samples[m_ptr][1] = sampleIn->imag();
|
|
|
|
// save result
|
|
doFIR(&s);
|
|
sampleOut->setReal(s.real());
|
|
sampleOut->setImag(s.imag());
|
|
|
|
// advance write-pointer
|
|
m_ptr = (m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder) % (HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1);
|
|
|
|
// next state
|
|
m_state = 0;
|
|
|
|
// tell caller we consumed the sample
|
|
return true;
|
|
}
|
|
}
|
|
|
|
void myDecimate(const Sample* sample1, Sample* sample2)
|
|
{
|
|
m_samples[m_ptr][0] = sample1->real();
|
|
m_samples[m_ptr][1] = sample1->imag();
|
|
m_ptr = HBFIRFilterTraits<HBFilterOrder>::hbMod[m_ptr + 2 - 1];
|
|
|
|
m_samples[m_ptr][0] = sample2->real();
|
|
m_samples[m_ptr][1] = sample2->imag();
|
|
|
|
doFIR(sample2);
|
|
|
|
m_ptr = HBFIRFilterTraits<HBFilterOrder>::hbMod[m_ptr + 2 - 1];
|
|
}
|
|
|
|
void myDecimate(qint32 x1, qint32 y1, qint32 *x2, qint32 *y2)
|
|
{
|
|
m_samples[m_ptr][0] = x1;
|
|
m_samples[m_ptr][1] = y1;
|
|
m_ptr = HBFIRFilterTraits<HBFilterOrder>::hbMod[m_ptr + 2 - 1];
|
|
|
|
m_samples[m_ptr][0] = *x2;
|
|
m_samples[m_ptr][1] = *y2;
|
|
|
|
doFIR(x2, y2);
|
|
|
|
m_ptr = HBFIRFilterTraits<HBFilterOrder>::hbMod[m_ptr + 2 - 1];
|
|
}
|
|
|
|
void myInterpolate(Sample* sample1, Sample* sample2)
|
|
{
|
|
m_samples[m_ptr][0] = sample1->real();
|
|
m_samples[m_ptr][1] = sample1->imag();
|
|
|
|
doFIR(sample1);
|
|
|
|
m_ptr = HBFIRFilterTraits<HBFilterOrder>::hbMod[m_ptr + 2 - 1];
|
|
|
|
m_samples[m_ptr][0] = 0;
|
|
m_samples[m_ptr][1] = 0;
|
|
|
|
doFIR(sample2);
|
|
|
|
m_ptr = HBFIRFilterTraits<HBFilterOrder>::hbMod[m_ptr + 2 - 1];
|
|
}
|
|
|
|
void myInterpolate(qint32 *x1, qint32 *y1, qint32 *x2, qint32 *y2)
|
|
{
|
|
m_samples[m_ptr][0] = *x1;
|
|
m_samples[m_ptr][1] = *y1;
|
|
|
|
doFIR(x1, y1);
|
|
|
|
m_ptr = HBFIRFilterTraits<HBFilterOrder>::hbMod[m_ptr + 2 - 1];
|
|
|
|
m_samples[m_ptr][0] = 0;
|
|
m_samples[m_ptr][1] = 0;
|
|
|
|
doFIR(x2, y2);
|
|
|
|
m_ptr = HBFIRFilterTraits<HBFilterOrder>::hbMod[m_ptr + 2 - 1];
|
|
}
|
|
|
|
protected:
|
|
qint32 m_samples[HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1][2]; // Valgrind optim (from qint16)
|
|
qint16 m_ptr;
|
|
int m_state;
|
|
|
|
void doFIR(Sample* sample)
|
|
{
|
|
// init read-pointer
|
|
int a = HBFIRFilterTraits<HBFilterOrder>::hbMod[m_ptr + 2 + 1]; // 0 + 1
|
|
int b = HBFIRFilterTraits<HBFilterOrder>::hbMod[m_ptr + 2 - 2]; //-1 - 1
|
|
|
|
// go through samples in buffer
|
|
qint32 iAcc = 0;
|
|
qint32 qAcc = 0;
|
|
|
|
for (int i = 0; i < HBFIRFilterTraits<HBFilterOrder>::hbOrder / 4; i++)
|
|
{
|
|
// do multiply-accumulate
|
|
//qint32 iTmp = m_samples[a][0] + m_samples[b][0]; // Valgrind optim
|
|
//qint32 qTmp = m_samples[a][1] + m_samples[b][1]; // Valgrind optim
|
|
iAcc += (m_samples[a][0] + m_samples[b][0]) * HBFIRFilterTraits<HBFilterOrder>::hbCoeffs[i];
|
|
qAcc += (m_samples[a][1] + m_samples[b][1]) * HBFIRFilterTraits<HBFilterOrder>::hbCoeffs[i];
|
|
|
|
// update read-pointer
|
|
a = HBFIRFilterTraits<HBFilterOrder>::hbMod[a + 2 + 2];
|
|
b = HBFIRFilterTraits<HBFilterOrder>::hbMod[b + 2 - 2];
|
|
}
|
|
|
|
a = HBFIRFilterTraits<HBFilterOrder>::hbMod[a + 2 - 1];
|
|
|
|
iAcc += ((qint32)m_samples[a][0] + 1) << (HBFIRFilterTraits<HBFilterOrder>::hbShift - 1);
|
|
qAcc += ((qint32)m_samples[a][1] + 1) << (HBFIRFilterTraits<HBFilterOrder>::hbShift - 1);
|
|
|
|
sample->setReal(iAcc >> (HBFIRFilterTraits<HBFilterOrder>::hbShift -1));
|
|
sample->setImag(qAcc >> (HBFIRFilterTraits<HBFilterOrder>::hbShift -1));
|
|
}
|
|
|
|
void doFIR(qint32 *x, qint32 *y)
|
|
{
|
|
// Coefficents. This is a sinc function:
|
|
// Half of the half of coefficients are stored because:
|
|
// - half of the coefficients are 0
|
|
// - there is a symmertry around the central 0.5 coefficient (not stored either)
|
|
// There are actually order+1 coefficients
|
|
|
|
// init read-pointer
|
|
int a = HBFIRFilterTraits<HBFilterOrder>::hbMod[m_ptr + 2 + 1]; // 0 + 1
|
|
int b = HBFIRFilterTraits<HBFilterOrder>::hbMod[m_ptr + 2 - 2]; //-1 - 1
|
|
|
|
// go through samples in buffer
|
|
qint32 iAcc = 0;
|
|
qint32 qAcc = 0;
|
|
|
|
for (int i = 0; i < HBFIRFilterTraits<HBFilterOrder>::hbOrder / 4; i++)
|
|
{
|
|
// do multiply-accumulate
|
|
//qint32 iTmp = m_samples[a][0] + m_samples[b][0]; // Valgrind optim
|
|
//qint32 qTmp = m_samples[a][1] + m_samples[b][1]; // Valgrind optim
|
|
iAcc += (m_samples[a][0] + m_samples[b][0]) * HBFIRFilterTraits<HBFilterOrder>::hbCoeffs[i];
|
|
qAcc += (m_samples[a][1] + m_samples[b][1]) * HBFIRFilterTraits<HBFilterOrder>::hbCoeffs[i];
|
|
|
|
// update read-pointer
|
|
a = HBFIRFilterTraits<HBFilterOrder>::hbMod[a + 2 + 2];
|
|
b = HBFIRFilterTraits<HBFilterOrder>::hbMod[b + 2 - 2];
|
|
}
|
|
|
|
a = HBFIRFilterTraits<HBFilterOrder>::hbMod[a + 2 - 1];
|
|
|
|
iAcc += ((qint32)m_samples[a][0] + 1) << (HBFIRFilterTraits<HBFilterOrder>::hbShift - 1);
|
|
qAcc += ((qint32)m_samples[a][1] + 1) << (HBFIRFilterTraits<HBFilterOrder>::hbShift - 1);
|
|
|
|
*x = iAcc >> (HBFIRFilterTraits<HBFilterOrder>::hbShift -1); // HB_SHIFT incorrect do not loose the gained bit
|
|
*y = qAcc >> (HBFIRFilterTraits<HBFilterOrder>::hbShift -1);
|
|
}
|
|
|
|
};
|
|
|
|
template<uint32_t HBFilterOrder>
|
|
IntHalfbandFilter<HBFilterOrder>::IntHalfbandFilter()
|
|
{
|
|
for (int i = 0; i < HBFIRFilterTraits<HBFilterOrder>::hbOrder + 1; i++)
|
|
{
|
|
m_samples[i][0] = 0;
|
|
m_samples[i][1] = 0;
|
|
}
|
|
|
|
m_ptr = 0;
|
|
|
|
m_state = 0;
|
|
}
|
|
|
|
#endif // INCLUDE_INTHALFBANDFILTER_H
|