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453 lines
12 KiB
C++
453 lines
12 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
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// written by Christian Daniel //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#include <stdio.h>
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#include "dsp/dspengine.h"
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#include "dsp/channelizer.h"
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#include "dsp/samplefifo.h"
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#include "dsp/samplesink.h"
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#include "dsp/dspcommands.h"
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#include "dsp/samplesource/samplesource.h"
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DSPEngine::DSPEngine(MessageQueue* reportQueue, QObject* parent) :
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QThread(parent),
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m_messageQueue(),
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m_reportQueue(reportQueue),
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m_state(StNotStarted),
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m_sampleSource(NULL),
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m_sampleSinks(),
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m_sampleRate(0),
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m_centerFrequency(0),
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m_dcOffsetCorrection(false),
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m_iqImbalanceCorrection(false),
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m_iOffset(0),
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m_qOffset(0),
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m_iRange(1 << 16),
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m_qRange(1 << 16),
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m_imbalance(65536)
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{
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moveToThread(this);
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}
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DSPEngine::~DSPEngine()
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{
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wait();
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}
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void DSPEngine::start()
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{
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DSPPing cmd;
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QThread::start();
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cmd.execute(&m_messageQueue);
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}
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void DSPEngine::stop()
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{
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DSPExit cmd;
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cmd.execute(&m_messageQueue);
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}
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bool DSPEngine::startAcquisition()
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{
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DSPAcquisitionStart cmd;
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return cmd.execute(&m_messageQueue) == StRunning;
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}
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void DSPEngine::stopAcquistion()
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{
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DSPAcquisitionStop cmd;
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cmd.execute(&m_messageQueue);
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if(m_dcOffsetCorrection)
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qDebug("DC offset:%f,%f", m_iOffset, m_qOffset);
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}
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void DSPEngine::setSource(SampleSource* source)
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{
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DSPSetSource cmd(source);
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cmd.execute(&m_messageQueue);
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}
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void DSPEngine::addSink(SampleSink* sink)
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{
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DSPAddSink cmd(sink);
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cmd.execute(&m_messageQueue);
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}
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void DSPEngine::removeSink(SampleSink* sink)
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{
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DSPRemoveSink cmd(sink);
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cmd.execute(&m_messageQueue);
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}
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void DSPEngine::addAudioSource(AudioFifo* audioFifo)
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{
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DSPAddAudioSource cmd(audioFifo);
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cmd.execute(&m_messageQueue);
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}
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void DSPEngine::removeAudioSource(AudioFifo* audioFifo)
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{
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DSPRemoveAudioSource cmd(audioFifo);
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cmd.execute(&m_messageQueue);
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}
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void DSPEngine::configureCorrections(bool dcOffsetCorrection, bool iqImbalanceCorrection)
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{
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Message* cmd = DSPConfigureCorrection::create(dcOffsetCorrection, iqImbalanceCorrection);
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cmd->submit(&m_messageQueue);
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}
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QString DSPEngine::errorMessage()
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{
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DSPGetErrorMessage cmd;
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cmd.execute(&m_messageQueue);
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return cmd.getErrorMessage();
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}
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QString DSPEngine::deviceDescription()
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{
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DSPGetDeviceDescription cmd;
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cmd.execute(&m_messageQueue);
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return cmd.getDeviceDescription();
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}
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void DSPEngine::run()
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{
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connect(&m_messageQueue, SIGNAL(messageEnqueued()), this, SLOT(handleMessages()), Qt::QueuedConnection);
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m_state = StIdle;
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handleMessages();
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exec();
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}
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void DSPEngine::dcOffset(SampleVector::iterator begin, SampleVector::iterator end)
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{
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double count;
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int io = 0;
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int qo = 0;
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Sample corr((qint16)m_iOffset, (qint16)m_qOffset);
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// sum and correct in one pass
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for(SampleVector::iterator it = begin; it < end; it++) {
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io += it->real();
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qo += it->imag();
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*it -= corr;
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}
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// moving average
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count = end - begin;
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m_iOffset = (15.0 * m_iOffset + (double)io / count) / 16.0;
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m_qOffset = (15.0 * m_qOffset + (double)qo / count) / 16.0;
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}
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void DSPEngine::imbalance(SampleVector::iterator begin, SampleVector::iterator end)
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{
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int iMin = 0;
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int iMax = 0;
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int qMin = 0;
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int qMax = 0;
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// find value ranges for both I and Q
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// both intervals should be same same size (for a perfect circle)
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for(SampleVector::iterator it = begin; it < end; it++) {
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if(it != begin) {
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if(it->real() < iMin)
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iMin = it->real();
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else if(it->real() > iMax)
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iMax = it->real();
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if(it->imag() < qMin)
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qMin = it->imag();
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else if(it->imag() > qMax)
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qMax = it->imag();
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} else {
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iMin = it->real();
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iMax = it->real();
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qMin = it->imag();
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qMax = it->imag();
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}
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}
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// sliding average (el cheapo again)
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m_iRange = (m_iRange * 15 + (iMax - iMin)) >> 4;
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m_qRange = (m_qRange * 15 + (qMax - qMin)) >> 4;
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// calculate imbalance as Q15.16
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if(m_qRange != 0)
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m_imbalance = ((uint)m_iRange << 16) / (uint)m_qRange;
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// correct imbalance and convert back to signed int 16
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for(SampleVector::iterator it = begin; it < end; it++)
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it->m_imag = (it->m_imag * m_imbalance) >> 16;
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}
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void DSPEngine::work()
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{
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SampleFifo* sampleFifo = m_sampleSource->getSampleFifo();
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size_t samplesDone = 0;
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bool positiveOnly = false;
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while((sampleFifo->fill() > 0) && (m_messageQueue.countPending() == 0) && (samplesDone < m_sampleRate)) {
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SampleVector::iterator part1begin;
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SampleVector::iterator part1end;
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SampleVector::iterator part2begin;
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SampleVector::iterator part2end;
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size_t count = sampleFifo->readBegin(sampleFifo->fill(), &part1begin, &part1end, &part2begin, &part2end);
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// first part of FIFO data
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if(part1begin != part1end) {
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// correct stuff
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if(m_dcOffsetCorrection)
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dcOffset(part1begin, part1end);
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if(m_iqImbalanceCorrection)
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imbalance(part1begin, part1end);
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// feed data to handlers
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for(SampleSinks::const_iterator it = m_sampleSinks.begin(); it != m_sampleSinks.end(); it++)
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(*it)->feed(part1begin, part1end, positiveOnly);
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}
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// second part of FIFO data (used when block wraps around)
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if(part2begin != part2end) {
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// correct stuff
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if(m_dcOffsetCorrection)
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dcOffset(part2begin, part2end);
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if(m_iqImbalanceCorrection)
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imbalance(part2begin, part2end);
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// feed data to handlers
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for(SampleSinks::const_iterator it = m_sampleSinks.begin(); it != m_sampleSinks.end(); it++)
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(*it)->feed(part2begin, part2end, positiveOnly);
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}
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// adjust FIFO pointers
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sampleFifo->readCommit(count);
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samplesDone += count;
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}
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}
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DSPEngine::State DSPEngine::gotoIdle()
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{
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switch(m_state) {
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case StNotStarted:
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return StNotStarted;
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case StIdle:
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case StError:
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return StIdle;
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case StRunning:
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break;
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}
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if(m_sampleSource == NULL)
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return StIdle;
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for(SampleSinks::const_iterator it = m_sampleSinks.begin(); it != m_sampleSinks.end(); it++)
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(*it)->stop();
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m_sampleSource->stopInput();
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m_deviceDescription.clear();
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m_audioOutput.stop();
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m_sampleRate = 0;
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return StIdle;
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}
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DSPEngine::State DSPEngine::gotoRunning()
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{
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switch(m_state) {
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case StNotStarted:
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return StNotStarted;
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case StRunning:
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return StRunning;
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case StIdle:
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case StError:
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break;
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}
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if(m_sampleSource == NULL)
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return gotoError("No sample source configured");
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m_iOffset = 0;
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m_qOffset = 0;
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m_iRange = 1 << 16;
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m_qRange = 1 << 16;
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if(!m_sampleSource->startInput(0))
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return gotoError("Could not start sample source");
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m_deviceDescription = m_sampleSource->getDeviceDescription();
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m_audioOutput.start(0, 48000);
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for(SampleSinks::const_iterator it = m_sampleSinks.begin(); it != m_sampleSinks.end(); it++)
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(*it)->start();
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m_sampleRate = 0; // make sure, report is sent
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generateReport();
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return StRunning;
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}
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DSPEngine::State DSPEngine::gotoError(const QString& errorMessage)
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{
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m_errorMessage = errorMessage;
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m_deviceDescription.clear();
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m_state = StError;
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return StError;
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}
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void DSPEngine::handleSetSource(SampleSource* source)
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{
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gotoIdle();
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if(m_sampleSource != NULL)
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disconnect(m_sampleSource->getSampleFifo(), SIGNAL(dataReady()), this, SLOT(handleData()));
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m_sampleSource = source;
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if(m_sampleSource != NULL)
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connect(m_sampleSource->getSampleFifo(), SIGNAL(dataReady()), this, SLOT(handleData()), Qt::QueuedConnection);
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generateReport();
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}
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void DSPEngine::generateReport()
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{
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bool needReport = false;
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unsigned int sampleRate;
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quint64 centerFrequency;
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if(m_sampleSource != NULL) {
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sampleRate = m_sampleSource->getSampleRate();
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centerFrequency = m_sampleSource->getCenterFrequency();
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} else {
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sampleRate = 100000;
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centerFrequency = 100000000;
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}
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if(sampleRate != m_sampleRate) {
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m_sampleRate = sampleRate;
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needReport = true;
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for(SampleSinks::const_iterator it = m_sampleSinks.begin(); it != m_sampleSinks.end(); it++) {
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DSPSignalNotification* signal = DSPSignalNotification::create(m_sampleRate, 0);
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signal->submit(&m_messageQueue, *it);
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}
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}
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if(centerFrequency != m_centerFrequency) {
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m_centerFrequency = centerFrequency;
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needReport = true;
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}
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if(needReport) {
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Message* rep = DSPEngineReport::create(m_sampleRate, m_centerFrequency);
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rep->submit(m_reportQueue);
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}
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}
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bool DSPEngine::distributeMessage(Message* message)
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{
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if(m_sampleSource != NULL) {
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if((message->getDestination() == NULL) || (message->getDestination() == m_sampleSource)) {
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if(m_sampleSource->handleMessage(message)) {
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generateReport();
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return true;
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}
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}
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}
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for(SampleSinks::const_iterator it = m_sampleSinks.begin(); it != m_sampleSinks.end(); it++) {
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if((message->getDestination() == NULL) || (message->getDestination() == *it)) {
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if((*it)->handleMessage(message))
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return true;
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}
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}
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return false;
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}
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void DSPEngine::handleData()
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{
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if(m_state == StRunning)
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work();
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}
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void DSPEngine::handleMessages()
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{
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Message* message;
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while((message = m_messageQueue.accept()) != NULL) {
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qDebug("Message: %s", message->getIdentifier());
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if(DSPPing::match(message)) {
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message->completed(m_state);
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} else if(DSPExit::match(message)) {
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gotoIdle();
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m_state = StNotStarted;
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exit();
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message->completed(m_state);
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} else if(DSPAcquisitionStart::match(message)) {
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m_state = gotoIdle();
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if(m_state == StIdle)
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m_state = gotoRunning();
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message->completed(m_state);
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} else if(DSPAcquisitionStop::match(message)) {
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m_state = gotoIdle();
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message->completed(m_state);
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} else if(DSPGetDeviceDescription::match(message)) {
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((DSPGetDeviceDescription*)message)->setDeviceDescription(m_deviceDescription);
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message->completed();
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} else if(DSPGetErrorMessage::match(message)) {
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((DSPGetErrorMessage*)message)->setErrorMessage(m_errorMessage);
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message->completed();
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} else if(DSPSetSource::match(message)) {
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handleSetSource(((DSPSetSource*)message)->getSampleSource());
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message->completed();
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} else if(DSPAddSink::match(message)) {
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SampleSink* sink = ((DSPAddSink*)message)->getSampleSink();
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if(m_state == StRunning) {
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DSPSignalNotification* signal = DSPSignalNotification::create(m_sampleRate, 0);
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signal->submit(&m_messageQueue, sink);
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sink->start();
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}
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m_sampleSinks.push_back(sink);
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message->completed();
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} else if(DSPRemoveSink::match(message)) {
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SampleSink* sink = ((DSPAddSink*)message)->getSampleSink();
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if(m_state == StRunning)
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sink->stop();
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m_sampleSinks.remove(sink);
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message->completed();
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} else if(DSPAddAudioSource::match(message)) {
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m_audioOutput.addFifo(((DSPAddAudioSource*)message)->getAudioFifo());
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message->completed();
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} else if(DSPRemoveAudioSource::match(message)) {
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m_audioOutput.removeFifo(((DSPAddAudioSource*)message)->getAudioFifo());
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message->completed();
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} else if(DSPConfigureCorrection::match(message)) {
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DSPConfigureCorrection* conf = (DSPConfigureCorrection*)message;
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m_iqImbalanceCorrection = conf->getIQImbalanceCorrection();
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if(m_dcOffsetCorrection != conf->getDCOffsetCorrection()) {
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m_dcOffsetCorrection = conf->getDCOffsetCorrection();
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m_iOffset = 0;
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m_qOffset = 0;
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}
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if(m_iqImbalanceCorrection != conf->getIQImbalanceCorrection()) {
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m_iqImbalanceCorrection = conf->getIQImbalanceCorrection();
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m_iRange = 1 << 16;
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m_qRange = 1 << 16;
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m_imbalance = 65536;
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}
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message->completed();
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} else {
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if(!distributeMessage(message))
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message->completed();
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}
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}
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}
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