mirror of
https://github.com/f4exb/sdrangel.git
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266 lines
8.7 KiB
C++
266 lines
8.7 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2015 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 "amdemod.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 <complex.h>
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#include "dsp/downchannelizer.h"
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#include "audio/audiooutput.h"
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#include "dsp/dspengine.h"
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#include "dsp/pidcontroller.h"
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#include "dsp/threadedbasebandsamplesink.h"
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#include "device/devicesourceapi.h"
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MESSAGE_CLASS_DEFINITION(AMDemod::MsgConfigureAMDemod, Message)
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MESSAGE_CLASS_DEFINITION(AMDemod::MsgConfigureChannelizer, Message)
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const QString AMDemod::m_channelIdURI = "de.maintech.sdrangelove.channel.am";
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const QString AMDemod::m_channelId = "AMDemod";
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const int AMDemod::m_udpBlockSize = 512;
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AMDemod::AMDemod(DeviceSourceAPI *deviceAPI) :
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ChannelSinkAPI(m_channelIdURI),
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m_deviceAPI(deviceAPI),
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m_absoluteFrequencyOffset(0),
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m_squelchOpen(false),
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m_magsqSum(0.0f),
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m_magsqPeak(0.0f),
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m_magsqCount(0),
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m_movingAverage(40, 0),
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m_volumeAGC(1200, 1.0),
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m_audioFifo(48000),
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m_settingsMutex(QMutex::Recursive)
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{
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setObjectName(m_channelId);
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m_audioBuffer.resize(1<<14);
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m_audioBufferFill = 0;
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m_movingAverage.resize(16, 0);
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m_volumeAGC.resize(4096, 0.003, 0);
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m_magsq = 0.0;
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DSPEngine::instance()->addAudioSink(&m_audioFifo);
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m_udpBufferAudio = new UDPSink<qint16>(this, m_udpBlockSize, m_settings.m_udpPort);
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m_channelizer = new DownChannelizer(this);
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m_threadedChannelizer = new ThreadedBasebandSampleSink(m_channelizer, this);
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m_deviceAPI->addThreadedSink(m_threadedChannelizer);
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m_deviceAPI->addChannelAPI(this);
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applySettings(m_settings, true);
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}
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AMDemod::~AMDemod()
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{
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DSPEngine::instance()->removeAudioSink(&m_audioFifo);
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delete m_udpBufferAudio;
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m_deviceAPI->removeChannelAPI(this);
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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 AMDemod::feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end, bool firstOfBurst __attribute__((unused)))
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{
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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() / 32768.0, it->imag() / 32768.0);
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Complex c(it->real(), it->imag());
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c *= m_nco.nextIQ();
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if (m_interpolatorDistance < 1.0f) // interpolate
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{
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processOneSample(ci);
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while (m_interpolator.interpolate(&m_interpolatorDistanceRemain, c, &ci))
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{
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processOneSample(ci);
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}
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m_interpolatorDistanceRemain += m_interpolatorDistance;
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}
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else // decimate
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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);
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m_interpolatorDistanceRemain += m_interpolatorDistance;
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}
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}
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}
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if (m_audioBufferFill > 0)
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{
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uint res = m_audioFifo.write((const quint8*)&m_audioBuffer[0], m_audioBufferFill, 10);
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if (res != m_audioBufferFill)
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{
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qDebug("AMDemod::feed: %u/%u tail samples written", res, m_audioBufferFill);
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}
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m_audioBufferFill = 0;
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}
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m_settingsMutex.unlock();
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}
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void AMDemod::start()
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{
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qDebug() << "AMDemod::start: m_inputSampleRate: " << m_settings.m_inputSampleRate
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<< " m_inputFrequencyOffset: " << m_settings.m_inputFrequencyOffset;
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m_squelchCount = 0;
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m_audioFifo.clear();
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}
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void AMDemod::stop()
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{
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}
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bool AMDemod::handleMessage(const Message& cmd)
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{
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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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AMDemodSettings settings = m_settings;
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settings.m_inputSampleRate = notif.getSampleRate();
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settings.m_inputFrequencyOffset = notif.getFrequencyOffset();
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applySettings(settings);
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qDebug() << "AMDemod::handleMessage: MsgChannelizerNotification:"
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<< " m_inputSampleRate: " << settings.m_inputSampleRate
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<< " m_inputFrequencyOffset: " << settings.m_inputFrequencyOffset;
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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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qDebug() << "AMDemod::handleMessage: MsgConfigureChannelizer:"
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<< " sampleRate: " << cfg.getSampleRate()
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<< " inputFrequencyOffset: " << cfg.getCenterFrequency();
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return true;
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}
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else if (MsgConfigureAMDemod::match(cmd))
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{
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MsgConfigureAMDemod& cfg = (MsgConfigureAMDemod&) cmd;
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AMDemodSettings settings = cfg.getSettings();
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// These settings are set with DownChannelizer::MsgChannelizerNotification
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m_absoluteFrequencyOffset = settings.m_inputFrequencyOffset;
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settings.m_inputSampleRate = m_settings.m_inputSampleRate;
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settings.m_inputFrequencyOffset = m_settings.m_inputFrequencyOffset;
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applySettings(settings, cfg.getForce());
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qDebug() << "AMDemod::handleMessage: MsgConfigureAMDemod:"
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<< " m_rfBandwidth: " << settings.m_rfBandwidth
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<< " m_volume: " << settings.m_volume
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<< " m_squelch: " << settings.m_squelch
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<< " m_audioMute: " << settings.m_audioMute
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<< " m_bandpassEnable: " << settings.m_bandpassEnable
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<< " m_copyAudioToUDP: " << settings.m_copyAudioToUDP
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<< " m_udpAddress: " << settings.m_udpAddress
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<< " m_udpPort: " << settings.m_udpPort
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<< " force: " << cfg.getForce();
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return true;
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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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void AMDemod::applySettings(const AMDemodSettings& settings, bool force)
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{
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if ((m_settings.m_inputFrequencyOffset != settings.m_inputFrequencyOffset) ||
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(m_settings.m_inputSampleRate != settings.m_inputSampleRate) || force)
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{
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m_nco.setFreq(-settings.m_inputFrequencyOffset, settings.m_inputSampleRate);
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}
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if((m_settings.m_inputSampleRate != settings.m_inputSampleRate) ||
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(m_settings.m_rfBandwidth != settings.m_rfBandwidth) ||
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(m_settings.m_audioSampleRate != settings.m_audioSampleRate) ||
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(m_settings.m_bandpassEnable != settings.m_bandpassEnable) || force)
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{
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m_settingsMutex.lock();
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m_interpolator.create(16, settings.m_inputSampleRate, settings.m_rfBandwidth / 2.2f);
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m_interpolatorDistanceRemain = 0;
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m_interpolatorDistance = (Real) settings.m_inputSampleRate / (Real) settings.m_audioSampleRate;
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m_bandpass.create(301, settings.m_audioSampleRate, 300.0, settings.m_rfBandwidth / 2.0f);
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m_settingsMutex.unlock();
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}
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if ((m_settings.m_squelch != settings.m_squelch) || force)
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{
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m_squelchLevel = pow(10.0, settings.m_squelch / 10.0);
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}
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if ((m_settings.m_udpAddress != settings.m_udpAddress)
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|| (m_settings.m_udpPort != settings.m_udpPort) || force)
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{
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m_udpBufferAudio->setAddress(const_cast<QString&>(settings.m_udpAddress));
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m_udpBufferAudio->setPort(settings.m_udpPort);
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}
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m_settings = settings;
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}
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QByteArray AMDemod::serialize() const
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{
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return m_settings.serialize();
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}
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bool AMDemod::deserialize(const QByteArray& data)
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{
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if (m_settings.deserialize(data))
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{
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MsgConfigureAMDemod *msg = MsgConfigureAMDemod::create(m_settings, true);
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m_inputMessageQueue.push(msg);
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return true;
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}
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else
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{
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m_settings.resetToDefaults();
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MsgConfigureAMDemod *msg = MsgConfigureAMDemod::create(m_settings, true);
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m_inputMessageQueue.push(msg);
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return false;
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}
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}
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