mirror of https://github.com/f4exb/sdrangel.git
337 lines
12 KiB
C++
337 lines
12 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/>. //
|
|
///////////////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
#include <dsp/upchannelizer.h>
|
|
#include "dsp/inthalfbandfilter.h"
|
|
#include "dsp/dspcommands.h"
|
|
|
|
#include <QString>
|
|
#include <QDebug>
|
|
|
|
MESSAGE_CLASS_DEFINITION(UpChannelizer::MsgChannelizerNotification, Message)
|
|
|
|
UpChannelizer::UpChannelizer(BasebandSampleSource* sampleSource) :
|
|
m_sampleSource(sampleSource),
|
|
m_outputSampleRate(0),
|
|
m_requestedInputSampleRate(0),
|
|
m_requestedCenterFrequency(0),
|
|
m_currentInputSampleRate(0),
|
|
m_currentCenterFrequency(0)
|
|
{
|
|
QString name = "UpChannelizer(" + m_sampleSource->objectName() + ")";
|
|
setObjectName(name);
|
|
}
|
|
|
|
UpChannelizer::~UpChannelizer()
|
|
{
|
|
freeFilterChain();
|
|
}
|
|
|
|
void UpChannelizer::configure(MessageQueue* messageQueue, int sampleRate, int centerFrequency)
|
|
{
|
|
Message* cmd = new DSPConfigureChannelizer(sampleRate, centerFrequency);
|
|
messageQueue->push(cmd);
|
|
}
|
|
|
|
void UpChannelizer::pull(Sample& sample)
|
|
{
|
|
if(m_sampleSource == 0) {
|
|
m_sampleBuffer.clear();
|
|
return;
|
|
}
|
|
|
|
if (m_filterStages.size() == 0) // optimization when no downsampling is done anyway
|
|
{
|
|
m_sampleSource->pull(sample);
|
|
}
|
|
else
|
|
{
|
|
m_mutex.lock();
|
|
|
|
FilterStages::iterator stage = m_filterStages.begin();
|
|
std::vector<Sample>::iterator stageSample = m_stageSamples.begin();
|
|
|
|
for (; stage != m_filterStages.end(); ++stage, ++stageSample)
|
|
{
|
|
if(stage == m_filterStages.end() - 1)
|
|
{
|
|
if ((*stage)->work(&m_sampleIn, &(*stageSample)))
|
|
{
|
|
m_sampleSource->pull(m_sampleIn); // get new input sample
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (!(*stage)->work(&(*(stageSample+1)), &(*stageSample)))
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
sample = *m_stageSamples.begin();
|
|
|
|
// for (; stage != m_filterStages.end(); ++stage)
|
|
// {
|
|
// // let's make it work for one stage only (96 kS/s < SR < 192 kS/s)
|
|
// if(stage == m_filterStages.end() - 1)
|
|
// {
|
|
// if ((*stage)->work(&m_sampleIn, &sample))
|
|
// {
|
|
// m_sampleSource->pull(m_sampleIn); // get new input sample
|
|
// }
|
|
// }
|
|
// }
|
|
|
|
m_mutex.unlock();
|
|
}
|
|
}
|
|
|
|
void UpChannelizer::start()
|
|
{
|
|
if (m_sampleSource != 0)
|
|
{
|
|
qDebug() << "UpChannelizer::start: thread: " << thread()
|
|
<< " m_outputSampleRate: " << m_outputSampleRate
|
|
<< " m_requestedInputSampleRate: " << m_requestedInputSampleRate
|
|
<< " m_requestedCenterFrequency: " << m_requestedCenterFrequency;
|
|
m_sampleSource->start();
|
|
}
|
|
}
|
|
|
|
void UpChannelizer::stop()
|
|
{
|
|
if(m_sampleSource != 0)
|
|
m_sampleSource->stop();
|
|
}
|
|
|
|
bool UpChannelizer::handleMessage(const Message& cmd)
|
|
{
|
|
qDebug() << "UpChannelizer::handleMessage: " << cmd.getIdentifier();
|
|
|
|
// TODO: apply changes only if input sample rate or requested output sample rate change. Change of center frequency has no impact.
|
|
|
|
if (DSPSignalNotification::match(cmd))
|
|
{
|
|
DSPSignalNotification& notif = (DSPSignalNotification&) cmd;
|
|
m_outputSampleRate = notif.getSampleRate();
|
|
qDebug() << "UpChannelizer::handleMessage: DSPSignalNotification: m_outputSampleRate: " << m_outputSampleRate;
|
|
applyConfiguration();
|
|
|
|
if (m_sampleSource != 0)
|
|
{
|
|
DSPSignalNotification* rep = new DSPSignalNotification(notif); // make a copy
|
|
m_sampleSource->getInputMessageQueue()->push(rep);
|
|
}
|
|
|
|
emit outputSampleRateChanged();
|
|
return true;
|
|
}
|
|
else if (DSPConfigureChannelizer::match(cmd))
|
|
{
|
|
DSPConfigureChannelizer& chan = (DSPConfigureChannelizer&) cmd;
|
|
m_requestedInputSampleRate = chan.getSampleRate();
|
|
m_requestedCenterFrequency = chan.getCenterFrequency();
|
|
|
|
qDebug() << "UpChannelizer::handleMessage: DSPConfigureChannelizer:"
|
|
<< " m_requestedInputSampleRate: " << m_requestedInputSampleRate
|
|
<< " m_requestedCenterFrequency: " << m_requestedCenterFrequency;
|
|
|
|
applyConfiguration();
|
|
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
// if (m_sampleSource != 0)
|
|
// {
|
|
// return m_sampleSource->handleMessage(cmd);
|
|
// }
|
|
// else
|
|
// {
|
|
// return false;
|
|
// }
|
|
}
|
|
}
|
|
|
|
void UpChannelizer::applyConfiguration()
|
|
{
|
|
if (m_outputSampleRate == 0)
|
|
{
|
|
qDebug() << "UpChannelizer::applyConfiguration: aborting (out=0):"
|
|
<< " out =" << m_outputSampleRate
|
|
<< ", req =" << m_requestedInputSampleRate
|
|
<< ", in =" << m_currentInputSampleRate
|
|
<< ", fc =" << m_currentCenterFrequency;
|
|
return;
|
|
}
|
|
|
|
m_mutex.lock();
|
|
|
|
freeFilterChain();
|
|
|
|
m_currentCenterFrequency = createFilterChain(
|
|
m_outputSampleRate / -2, m_outputSampleRate / 2,
|
|
m_requestedCenterFrequency - m_requestedInputSampleRate / 2, m_requestedCenterFrequency + m_requestedInputSampleRate / 2);
|
|
|
|
m_mutex.unlock();
|
|
|
|
m_currentInputSampleRate = m_outputSampleRate / (1 << m_filterStages.size());
|
|
|
|
qDebug() << "UpChannelizer::applyConfiguration:"
|
|
<< " out=" << m_outputSampleRate
|
|
<< ", req=" << m_requestedInputSampleRate
|
|
<< ", in=" << m_currentInputSampleRate
|
|
<< ", fc=" << m_currentCenterFrequency;
|
|
|
|
if (m_sampleSource != 0)
|
|
{
|
|
MsgChannelizerNotification *notif = MsgChannelizerNotification::create(m_outputSampleRate, m_currentInputSampleRate, m_currentCenterFrequency);
|
|
m_sampleSource->getInputMessageQueue()->push(notif);
|
|
}
|
|
}
|
|
|
|
#ifdef USE_SSE4_1
|
|
UpChannelizer::FilterStage::FilterStage(Mode mode) :
|
|
m_filter(new IntHalfbandFilterEO1<UPCHANNELIZER_HB_FILTER_ORDER>),
|
|
m_workFunction(0)
|
|
{
|
|
switch(mode) {
|
|
case ModeCenter:
|
|
m_workFunction = &IntHalfbandFilterEO1<UPCHANNELIZER_HB_FILTER_ORDER>::workInterpolateCenter;
|
|
break;
|
|
|
|
case ModeLowerHalf:
|
|
m_workFunction = &IntHalfbandFilterEO1<UPCHANNELIZER_HB_FILTER_ORDER>::workInterpolateLowerHalf;
|
|
break;
|
|
|
|
case ModeUpperHalf:
|
|
m_workFunction = &IntHalfbandFilterEO1<UPCHANNELIZER_HB_FILTER_ORDER>::workInterpolateUpperHalf;
|
|
break;
|
|
}
|
|
}
|
|
#else
|
|
UpChannelizer::FilterStage::FilterStage(Mode mode) :
|
|
m_filter(new IntHalfbandFilterDB<qint32, UPCHANNELIZER_HB_FILTER_ORDER>),
|
|
m_workFunction(0)
|
|
{
|
|
switch(mode) {
|
|
case ModeCenter:
|
|
m_workFunction = &IntHalfbandFilterDB<qint32, UPCHANNELIZER_HB_FILTER_ORDER>::workInterpolateCenter;
|
|
break;
|
|
|
|
case ModeLowerHalf:
|
|
m_workFunction = &IntHalfbandFilterDB<qint32, UPCHANNELIZER_HB_FILTER_ORDER>::workInterpolateLowerHalf;
|
|
break;
|
|
|
|
case ModeUpperHalf:
|
|
m_workFunction = &IntHalfbandFilterDB<qint32, UPCHANNELIZER_HB_FILTER_ORDER>::workInterpolateUpperHalf;
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
UpChannelizer::FilterStage::~FilterStage()
|
|
{
|
|
delete m_filter;
|
|
}
|
|
|
|
bool UpChannelizer::signalContainsChannel(Real sigStart, Real sigEnd, Real chanStart, Real chanEnd) const
|
|
{
|
|
//qDebug(" testing signal [%f, %f], channel [%f, %f]", sigStart, sigEnd, chanStart, chanEnd);
|
|
if(sigEnd <= sigStart)
|
|
return false;
|
|
if(chanEnd <= chanStart)
|
|
return false;
|
|
return (sigStart <= chanStart) && (sigEnd >= chanEnd);
|
|
}
|
|
|
|
Real UpChannelizer::createFilterChain(Real sigStart, Real sigEnd, Real chanStart, Real chanEnd)
|
|
{
|
|
Real sigBw = sigEnd - sigStart;
|
|
Real safetyMargin = sigBw / 20;
|
|
Real rot = sigBw / 4;
|
|
Sample s;
|
|
|
|
safetyMargin = 0;
|
|
|
|
qDebug() << "UpChannelizer::createFilterChain: start:"
|
|
<< " sig: [" << sigStart << ":" << sigEnd << "]"
|
|
<< " BW: " << sigBw
|
|
<< " chan: [" << chanStart << ":" << chanEnd << "]"
|
|
<< " rot: " << rot
|
|
<< " safety: " << safetyMargin;
|
|
|
|
// check if it fits into the left half
|
|
if(signalContainsChannel(sigStart + safetyMargin, sigStart + sigBw / 2.0 - safetyMargin, chanStart, chanEnd))
|
|
{
|
|
qDebug() << "UpChannelizer::createFilterChain: take left half (rotate by +1/4 and decimate by 2):"
|
|
<< " [" << m_filterStages.size() << "]"
|
|
<< " sig: [" << sigStart << ":" << sigStart + sigBw / 2.0 << "]";
|
|
m_filterStages.push_back(new FilterStage(FilterStage::ModeLowerHalf));
|
|
m_stageSamples.push_back(s);
|
|
return createFilterChain(sigStart, sigStart + sigBw / 2.0, chanStart, chanEnd);
|
|
}
|
|
|
|
// check if it fits into the right half
|
|
if(signalContainsChannel(sigEnd - sigBw / 2.0f + safetyMargin, sigEnd - safetyMargin, chanStart, chanEnd))
|
|
{
|
|
qDebug() << "UpChannelizer::createFilterChain: take right half (rotate by -1/4 and decimate by 2):"
|
|
<< " [" << m_filterStages.size() << "]"
|
|
<< " sig: [" << sigEnd - sigBw / 2.0f << ":" << sigEnd << "]";
|
|
m_filterStages.push_back(new FilterStage(FilterStage::ModeUpperHalf));
|
|
m_stageSamples.push_back(s);
|
|
return createFilterChain(sigEnd - sigBw / 2.0f, sigEnd, chanStart, chanEnd);
|
|
}
|
|
|
|
// check if it fits into the center
|
|
// Was: if(signalContainsChannel(sigStart + rot + safetyMargin, sigStart + rot + sigBw / 2.0f - safetyMargin, chanStart, chanEnd)) {
|
|
if(signalContainsChannel(sigStart + rot + safetyMargin, sigEnd - rot - safetyMargin, chanStart, chanEnd))
|
|
{
|
|
qDebug() << "UpChannelizer::createFilterChain: take center half (decimate by 2):"
|
|
<< " [" << m_filterStages.size() << "]"
|
|
<< " sig: [" << sigStart + rot << ":" << sigEnd - rot << "]";
|
|
m_filterStages.push_back(new FilterStage(FilterStage::ModeCenter));
|
|
m_stageSamples.push_back(s);
|
|
// Was: return createFilterChain(sigStart + rot, sigStart + sigBw / 2.0f + rot, chanStart, chanEnd);
|
|
return createFilterChain(sigStart + rot, sigEnd - rot, chanStart, chanEnd);
|
|
}
|
|
|
|
Real ofs = ((chanEnd - chanStart) / 2.0 + chanStart) - ((sigEnd - sigStart) / 2.0 + sigStart);
|
|
|
|
qDebug() << "UpChannelizer::createFilterChain: complete:"
|
|
<< " #stages: " << m_filterStages.size()
|
|
<< " BW: " << sigBw
|
|
<< " ofs: " << ofs;
|
|
|
|
return ofs;
|
|
}
|
|
|
|
void UpChannelizer::freeFilterChain()
|
|
{
|
|
for(FilterStages::iterator it = m_filterStages.begin(); it != m_filterStages.end(); ++it)
|
|
delete *it;
|
|
m_filterStages.clear();
|
|
m_stageSamples.clear();
|
|
}
|
|
|
|
|
|
|
|
|