Add support for Packet demodulator to Demod Analyzer feature. Use RF bandwidth setting for interpolator

plugins/channelrx/demodpacket/packetdemod.cpp

@@ -54,6 +54,7 @@ PacketDemod::PacketDemod(DeviceAPI *deviceAPI) :
 
     m_basebandSink = new PacketDemodBaseband(this);
     m_basebandSink->setMessageQueueToChannel(getInputMessageQueue());
+    m_basebandSink->setChannel(this);
     m_basebandSink->moveToThread(&m_thread);
 
     applySettings(m_settings, true);

plugins/channelrx/demodpacket/packetdemodbaseband.cpp

@@ -78,6 +78,11 @@ void PacketDemodBaseband::stopWork()
     m_running = false;
 }
 
+void PacketDemodBaseband::setChannel(ChannelAPI *channel)
+{
+    m_sink.setChannel(channel);
+}
+
 void PacketDemodBaseband::feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end)
 {
     m_sampleFifo.write(begin, end);

plugins/channelrx/demodpacket/packetdemodbaseband.h

@@ -29,6 +29,7 @@
 #include "packetdemodsink.h"
 
 class DownChannelizer;
+class ChannelAPI;
 class PacketDemod;
 
 class PacketDemodBaseband : public QObject
@@ -70,6 +71,7 @@ public:
     }
     void setMessageQueueToChannel(MessageQueue *messageQueue) { m_sink.setMessageQueueToChannel(messageQueue); }
     void setBasebandSampleRate(int sampleRate);
+    void setChannel(ChannelAPI *channel);
     double getMagSq() const { return m_sink.getMagSq(); }
     bool isRunning() const { return m_running; }
 

plugins/channelrx/demodpacket/packetdemodsink.cpp

@@ -21,7 +21,7 @@
 #include <complex.h>
 
 #include "dsp/dspengine.h"
-#include "dsp/dspengine.h"
+#include "dsp/datafifo.h"
 #include "util/db.h"
 #include "util/stepfunctions.h"
 #include "pipes/pipeendpoint.h"
@@ -46,6 +46,9 @@ PacketDemodSink::PacketDemodSink(PacketDemod *packetDemod) :
 {
     m_magsq = 0.0;
 
+    m_demodBuffer.resize(1<<12);
+    m_demodBufferFill = 0;
+
     applySettings(m_settings, true);
     applyChannelSettings(m_channelSampleRate, m_channelFrequencyOffset, true);
 }
@@ -236,6 +239,24 @@ void PacketDemodSink::processOneSample(Complex &ci)
     }
     m_corrIdx = (m_corrIdx + 1) % m_correlationLength;
     m_corrCnt++;
+
+    m_demodBuffer[m_demodBufferFill++] = fmDemod * std::numeric_limits<int16_t>::max();
+
+    if (m_demodBufferFill >= m_demodBuffer.size())
+    {
+        QList<DataFifo*> *dataFifos = MainCore::instance()->getDataPipes().getFifos(m_channel, "demod");
+
+        if (dataFifos)
+        {
+            QList<DataFifo*>::iterator it = dataFifos->begin();
+
+            for (; it != dataFifos->end(); ++it) {
+                (*it)->write((quint8*) &m_demodBuffer[0], m_demodBuffer.size() * sizeof(qint16));
+            }
+        }
+
+        m_demodBufferFill = 0;
+    }
 }
 
 void PacketDemodSink::applyChannelSettings(int channelSampleRate, int channelFrequencyOffset, bool force)
@@ -252,9 +273,9 @@ void PacketDemodSink::applyChannelSettings(int channelSampleRate, int channelFre
 
     if ((m_channelSampleRate != channelSampleRate) || force)
     {
-        m_interpolator.create(16, channelSampleRate, PACKETDEMOD_CHANNEL_BANDWIDTH);
+        m_interpolator.create(16, channelSampleRate, m_settings.m_rfBandwidth / 2.2);
-        m_interpolatorDistanceRemain = 0;
         m_interpolatorDistance = (Real) channelSampleRate / (Real) PACKETDEMOD_CHANNEL_SAMPLE_RATE;
+        m_interpolatorDistanceRemain = m_interpolatorDistance;
     }
 
     m_channelSampleRate = channelSampleRate;
@@ -266,11 +287,20 @@ void PacketDemodSink::applySettings(const PacketDemodSettings& settings, bool fo
     qDebug() << "PacketDemodSink::applySettings:"
             << " force: " << force;
 
+    if ((settings.m_rfBandwidth != m_settings.m_rfBandwidth) || force)
+    {
+        m_interpolator.create(16, m_channelSampleRate, settings.m_rfBandwidth / 2.2);
+        m_interpolatorDistance = (Real) m_channelSampleRate / (Real) PACKETDEMOD_CHANNEL_SAMPLE_RATE;
+        m_interpolatorDistanceRemain = m_interpolatorDistance;
+        m_lowpass.create(301, PACKETDEMOD_CHANNEL_SAMPLE_RATE, settings.m_rfBandwidth / 2.0f);
+    }
+    if ((settings.m_fmDeviation != m_settings.m_fmDeviation) || force)
+    {
+        m_phaseDiscri.setFMScaling(PACKETDEMOD_CHANNEL_SAMPLE_RATE / (2.0f * settings.m_fmDeviation));
+    }
+
     if (force)
     {
-        m_lowpass.create(301, PACKETDEMOD_CHANNEL_SAMPLE_RATE, settings.m_rfBandwidth / 2.0f);
-        m_phaseDiscri.setFMScaling(PACKETDEMOD_CHANNEL_SAMPLE_RATE / (2.0f * settings.m_fmDeviation));
-
         delete m_f1;
         delete m_f0;
         delete m_corrBuf;

plugins/channelrx/demodpacket/packetdemodsink.h

@@ -19,6 +19,8 @@
 #ifndef INCLUDE_PACKETDEMODSINK_H
 #define INCLUDE_PACKETDEMODSINK_H
 
+#include <QVector>
+
 #include "dsp/channelsamplesink.h"
 #include "dsp/phasediscri.h"
 #include "dsp/nco.h"
@@ -39,6 +41,7 @@
 // Must be integer multiple of m_baud=1200
 #define PACKETDEMOD_CHANNEL_SAMPLE_RATE 38400
 
+class ChannelAPI;
 class PacketDemod;
 
 class PacketDemodSink : public ChannelSampleSink {
@@ -51,6 +54,7 @@ public:
     void applyChannelSettings(int channelSampleRate, int channelFrequencyOffset, bool force = false);
     void applySettings(const PacketDemodSettings& settings, bool force = false);
     void setMessageQueueToChannel(MessageQueue *messageQueue) { m_messageQueueToChannel = messageQueue; }
+    void setChannel(ChannelAPI *channel) { m_channel = channel; }
 
     double getMagSq() const { return m_magsq; }
 
@@ -86,6 +90,7 @@ private:
 
     PacketDemod *m_packetDemod;
     PacketDemodSettings m_settings;
+    ChannelAPI *m_channel;
     int m_channelSampleRate;
     int m_channelFrequencyOffset;
 
@@ -128,6 +133,9 @@ private:
     int m_byteCount;
     crc16x25 m_crc;
 
+    QVector<qint16> m_demodBuffer;
+    int m_demodBufferFill;
+
     void processOneSample(Complex &ci);
     MessageQueue *getMessageQueueToChannel() { return m_messageQueueToChannel; }
 };

plugins/feature/demodanalyzer/demodanalyzersettings.cpp

@@ -28,6 +28,7 @@ const QStringList DemodAnalyzerSettings::m_channelTypes = {
     QStringLiteral("DSDDemod"),
     QStringLiteral("NFMDemod"),
     QStringLiteral("NFMMod"),
+    QStringLiteral("PacketDemod"),
     QStringLiteral("PacketMod"),
     QStringLiteral("SSBDemod"),
     QStringLiteral("SSBMod"),
@@ -41,6 +42,7 @@ const QStringList DemodAnalyzerSettings::m_channelURIs = {
     QStringLiteral("sdrangel.channel.dsddemod"),
     QStringLiteral("sdrangel.channel.nfmdemod"),
     QStringLiteral("sdrangel.channeltx.modnfm"),
+    QStringLiteral("sdrangel.channel.packetdemod"),
     QStringLiteral("sdrangel.channeltx.modpacket"),
     QStringLiteral("sdrangel.channel.ssbdemod"),
     QStringLiteral("sdrangel.channeltx.modssb"),