kopia lustrzana https://github.com/f4exb/sdrangel
252 wiersze
8.1 KiB
C++
252 wiersze
8.1 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2017 Edouard Griffiths, F4EXB //
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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 "chanalyzerng.h"
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#include <QTime>
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#include <QDebug>
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#include <stdio.h>
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#include "device/devicesourceapi.h"
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#include "audio/audiooutput.h"
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#include "dsp/threadedbasebandsamplesink.h"
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#include "dsp/downchannelizer.h"
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MESSAGE_CLASS_DEFINITION(ChannelAnalyzerNG::MsgConfigureChannelAnalyzer, Message)
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MESSAGE_CLASS_DEFINITION(ChannelAnalyzerNG::MsgConfigureChannelizer, Message)
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MESSAGE_CLASS_DEFINITION(ChannelAnalyzerNG::MsgReportChannelSampleRateChanged, Message)
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ChannelAnalyzerNG::ChannelAnalyzerNG(DeviceSourceAPI *deviceAPI) :
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m_deviceAPI(deviceAPI),
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m_sampleSink(0),
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m_settingsMutex(QMutex::Recursive)
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{
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m_undersampleCount = 0;
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m_sum = 0;
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m_usb = true;
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m_magsq = 0;
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m_useInterpolator = false;
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m_interpolatorDistance = 1.0f;
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m_interpolatorDistanceRemain = 0.0f;
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SSBFilter = new fftfilt(m_config.m_LowCutoff / m_config.m_inputSampleRate, m_config.m_Bandwidth / m_config.m_inputSampleRate, ssbFftLen);
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DSBFilter = new fftfilt(m_config.m_Bandwidth / m_config.m_inputSampleRate, 2*ssbFftLen);
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m_channelizer = new DownChannelizer(this);
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m_threadedChannelizer = new ThreadedBasebandSampleSink(m_channelizer, this);
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connect(m_channelizer, SIGNAL(inputSampleRateChanged()), this, SLOT(channelizerInputSampleRateChanged()));
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m_deviceAPI->addThreadedSink(m_threadedChannelizer);
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apply(true);
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}
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ChannelAnalyzerNG::~ChannelAnalyzerNG()
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{
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if (SSBFilter) delete SSBFilter;
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if (DSBFilter) delete DSBFilter;
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m_deviceAPI->removeThreadedSink(m_threadedChannelizer);
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delete m_threadedChannelizer;
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delete m_channelizer;
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}
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void ChannelAnalyzerNG::configure(MessageQueue* messageQueue,
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int channelSampleRate,
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Real Bandwidth,
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Real LowCutoff,
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int spanLog2,
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bool ssb)
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{
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Message* cmd = MsgConfigureChannelAnalyzer::create(channelSampleRate, Bandwidth, LowCutoff, spanLog2, ssb);
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messageQueue->push(cmd);
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}
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void ChannelAnalyzerNG::feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end, bool positiveOnly __attribute__((unused)))
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{
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fftfilt::cmplx *sideband = 0;
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Complex ci;
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m_settingsMutex.lock();
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for(SampleVector::const_iterator it = begin; it < end; ++it)
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{
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Complex c(it->real(), it->imag());
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c *= m_nco.nextIQ();
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if (m_useInterpolator)
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{
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if (m_interpolator.decimate(&m_interpolatorDistanceRemain, c, &ci))
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{
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processOneSample(ci, sideband);
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m_interpolatorDistanceRemain += m_interpolatorDistance;
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}
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}
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else
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{
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processOneSample(c, sideband);
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}
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}
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if(m_sampleSink != 0)
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{
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m_sampleSink->feed(m_sampleBuffer.begin(), m_sampleBuffer.end(), m_running.m_ssb); // m_ssb = positive only
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}
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m_sampleBuffer.clear();
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m_settingsMutex.unlock();
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}
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void ChannelAnalyzerNG::start()
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{
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}
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void ChannelAnalyzerNG::stop()
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{
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}
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void ChannelAnalyzerNG::channelizerInputSampleRateChanged()
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{
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MsgReportChannelSampleRateChanged *msg = MsgReportChannelSampleRateChanged::create();
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getMessageQueueToGUI()->push(msg);
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}
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bool ChannelAnalyzerNG::handleMessage(const Message& cmd)
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{
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qDebug() << "ChannelAnalyzerNG::handleMessage: " << cmd.getIdentifier();
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if (DownChannelizer::MsgChannelizerNotification::match(cmd))
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{
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DownChannelizer::MsgChannelizerNotification& notif = (DownChannelizer::MsgChannelizerNotification&) cmd;
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m_config.m_inputSampleRate = notif.getSampleRate();
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m_config.m_frequency = notif.getFrequencyOffset();
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qDebug() << "ChannelAnalyzerNG::handleMessage: MsgChannelizerNotification:"
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<< " m_sampleRate: " << m_config.m_inputSampleRate
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<< " frequencyOffset: " << m_config.m_frequency;
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apply();
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return true;
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}
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else if (MsgConfigureChannelizer::match(cmd))
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{
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MsgConfigureChannelizer& cfg = (MsgConfigureChannelizer&) cmd;
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m_channelizer->configure(m_channelizer->getInputMessageQueue(),
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cfg.getSampleRate(),
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cfg.getCenterFrequency());
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return true;
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}
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else if (MsgConfigureChannelAnalyzer::match(cmd))
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{
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MsgConfigureChannelAnalyzer& cfg = (MsgConfigureChannelAnalyzer&) cmd;
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m_config.m_channelSampleRate = cfg.getChannelSampleRate();
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m_config.m_Bandwidth = cfg.getBandwidth();
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m_config.m_LowCutoff = cfg.getLoCutoff();
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m_config.m_spanLog2 = cfg.getSpanLog2();
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m_config.m_ssb = cfg.getSSB();
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qDebug() << "ChannelAnalyzerNG::handleMessage: MsgConfigureChannelAnalyzer:"
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<< " m_channelSampleRate: " << m_config.m_channelSampleRate
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<< " m_Bandwidth: " << m_config.m_Bandwidth
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<< " m_LowCutoff: " << m_config.m_LowCutoff
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<< " m_spanLog2: " << m_config.m_spanLog2
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<< " m_ssb: " << m_config.m_ssb;
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apply();
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return true;
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}
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else
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{
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if (m_sampleSink != 0)
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{
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return m_sampleSink->handleMessage(cmd);
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}
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else
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{
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return false;
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}
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}
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}
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void ChannelAnalyzerNG::apply(bool force)
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{
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if ((m_running.m_frequency != m_config.m_frequency) ||
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(m_running.m_inputSampleRate != m_config.m_inputSampleRate) ||
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force)
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{
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m_nco.setFreq(-m_config.m_frequency, m_config.m_inputSampleRate);
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}
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if ((m_running.m_inputSampleRate != m_config.m_inputSampleRate) ||
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(m_running.m_channelSampleRate != m_config.m_channelSampleRate) ||
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force)
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{
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m_settingsMutex.lock();
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m_interpolator.create(16, m_config.m_inputSampleRate, m_config.m_inputSampleRate / 2.2);
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m_interpolatorDistanceRemain = 0.0f;
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m_interpolatorDistance = (Real) m_config.m_inputSampleRate / (Real) m_config.m_channelSampleRate;
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m_useInterpolator = (m_config.m_inputSampleRate != m_config.m_channelSampleRate); // optim
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m_settingsMutex.unlock();
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}
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if ((m_running.m_channelSampleRate != m_config.m_channelSampleRate) ||
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(m_running.m_Bandwidth != m_config.m_Bandwidth) ||
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(m_running.m_LowCutoff != m_config.m_LowCutoff) ||
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force)
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{
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float bandwidth = m_config.m_Bandwidth;
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float lowCutoff = m_config.m_LowCutoff;
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if (bandwidth < 0)
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{
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bandwidth = -bandwidth;
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lowCutoff = -lowCutoff;
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m_usb = false;
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}
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else
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{
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m_usb = true;
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}
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if (bandwidth < 100.0f)
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{
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bandwidth = 100.0f;
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lowCutoff = 0;
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}
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m_settingsMutex.lock();
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SSBFilter->create_filter(lowCutoff / m_config.m_channelSampleRate, bandwidth / m_config.m_channelSampleRate);
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DSBFilter->create_dsb_filter(bandwidth / m_config.m_channelSampleRate);
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m_settingsMutex.unlock();
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}
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m_running.m_frequency = m_config.m_frequency;
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m_running.m_channelSampleRate = m_config.m_channelSampleRate;
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m_running.m_inputSampleRate = m_config.m_inputSampleRate;
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m_running.m_Bandwidth = m_config.m_Bandwidth;
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m_running.m_LowCutoff = m_config.m_LowCutoff;
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//m_settingsMutex.lock();
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m_running.m_spanLog2 = m_config.m_spanLog2;
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m_running.m_ssb = m_config.m_ssb;
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//m_settingsMutex.unlock();
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}
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