KiwiSDR: implement variable sample rate. Fixes #1523

plugins/samplesource/kiwisdr/kiwisdrinput.cpp

@@ -43,6 +43,7 @@ MESSAGE_CLASS_DEFINITION(KiwiSDRInput::MsgSetStatus, Message)
 
 KiwiSDRInput::KiwiSDRInput(DeviceAPI *deviceAPI) :
     m_deviceAPI(deviceAPI),
+    m_sampleRate(12000),
 	m_settings(),
 	m_kiwiSDRWorker(nullptr),
     m_kiwiSDRWorkerThread(nullptr),
@@ -101,6 +102,7 @@ bool KiwiSDRInput::start()
 
     m_kiwiSDRWorkerThread = new QThread();
 	m_kiwiSDRWorker = new KiwiSDRWorker(&m_sampleFifo);
+    m_kiwiSDRWorker->setInputMessageQueue(getInputMessageQueue());
 	m_kiwiSDRWorker->moveToThread(m_kiwiSDRWorkerThread);
 
     QObject::connect(m_kiwiSDRWorkerThread, &QThread::finished, m_kiwiSDRWorker, &QObject::deleteLater);
@@ -174,7 +176,7 @@ const QString& KiwiSDRInput::getDeviceDescription() const
 
 int KiwiSDRInput::getSampleRate() const
 {
-	return 12000;
+	return m_sampleRate;
 }
 
 quint64 KiwiSDRInput::getCenterFrequency() const
@@ -219,6 +221,22 @@ bool KiwiSDRInput::handleMessage(const Message& message)
 
         return true;
     }
+    else if (KiwiSDRWorker::MsgReportSampleRate::match(message))
+    {
+        KiwiSDRWorker::MsgReportSampleRate& report = (KiwiSDRWorker::MsgReportSampleRate&) message;
+        m_sampleRate = report.getSampleRate();
+        qDebug() << "KiwiSDRInput::handleMessage: KiwiSDRWorker::MsgReportSampleRate: m_sampleRate: " << m_sampleRate;
+
+        if (!m_sampleFifo.setSize(m_sampleRate * 2)) {
+            qCritical("KiwiSDRInput::KiwiSDRInput: Could not allocate SampleFifo");
+        }
+
+		DSPSignalNotification *notif = new DSPSignalNotification(
+			m_sampleRate, m_settings.m_centerFrequency);
+		m_deviceAPI->getDeviceEngineInputMessageQueue()->push(notif);
+
+        return true;
+    }
     else if (MsgStartStop::match(message))
     {
         MsgStartStop& cmd = (MsgStartStop&) message;

plugins/samplesource/kiwisdr/kiwisdrinput.h

@@ -155,6 +155,7 @@ public:
 private:
 	DeviceAPI *m_deviceAPI;
 	QMutex m_mutex;
+    int m_sampleRate;
 	KiwiSDRSettings m_settings;
 	KiwiSDRWorker* m_kiwiSDRWorker;
 	QThread *m_kiwiSDRWorkerThread;

plugins/samplesource/kiwisdr/kiwisdrworker.cpp

@@ -16,14 +16,19 @@
 ///////////////////////////////////////////////////////////////////////////////////
 
 #include <boost/endian/conversion.hpp>
+#include "util/messagequeue.h"
 #include "kiwisdrworker.h"
 
+MESSAGE_CLASS_DEFINITION(KiwiSDRWorker::MsgReportSampleRate, Message)
+
 KiwiSDRWorker::KiwiSDRWorker(SampleSinkFifo* sampleFifo) :
 	QObject(),
 	m_timer(this),
 	m_samplesBuf(),
 	m_sampleFifo(sampleFifo),
 	m_centerFrequency(1450000),
+    m_sampleRate(12000),
+    m_inputMessageQueue(nullptr),
 	m_gain(20),
 	m_useAGC(true),
     m_status(0)
@@ -66,7 +71,8 @@ void KiwiSDRWorker::sendCenterFrequency()
 		return;
 
 	QString freq = QString::number(m_centerFrequency / 1000.0, 'f', 3);
-	QString msg = "SET mod=iq low_cut=-5980 high_cut=5980 freq=" + freq;
+    int bw = (m_sampleRate/2) - 20;
+	QString msg = QString("SET mod=iq low_cut=-%1 high_cut=%2 freq=%3").arg(bw).arg(bw).arg(freq);
 	m_webSocket.sendTextMessage(msg);
 }
 
@@ -87,16 +93,36 @@ void KiwiSDRWorker::onBinaryMessageReceived(const QByteArray &message)
 	if (message[0] == 'M' && message[1] == 'S' && message[2] == 'G')
 	{
 		QStringList al = QString::fromUtf8(message).split(' ');
-		if (al.size() > 2 && al[2] == "audio_rate=12000")
-		{
-			m_webSocket.sendTextMessage("SET AR OK in=12000 out=48000");
-			m_webSocket.sendTextMessage("SERVER DE CLIENT KiwiAngel SND");
-			sendGain();
-			sendCenterFrequency();
-			m_timer.start(5000);
-            m_status = 2;
-			emit updateStatus(2);
-		}
+
+        if ((al.size() > 2) && al[2].startsWith("audio_rate="))
+        {
+            QStringList rateKeyVal = al[2].split('=');
+
+            if (rateKeyVal.size() > 1)
+            {
+                bool ok;
+                int sampleRate = rateKeyVal[1].toInt(&ok);
+
+                if (ok) {
+                    m_sampleRate = sampleRate;
+                }
+
+                qDebug("KiwiSDRWorker::onBinaryMessageReceived: sample rate: %d", m_sampleRate);
+
+                if (m_inputMessageQueue) {
+                    m_inputMessageQueue->push(MsgReportSampleRate::create(m_sampleRate));
+                }
+
+                QString msg = QString("SET AR OK in=%1 out=48000").arg(m_sampleRate);
+                m_webSocket.sendTextMessage(msg);
+                m_webSocket.sendTextMessage("SERVER DE CLIENT KiwiAngel SND");
+                sendGain();
+                sendCenterFrequency();
+                m_timer.start(5000);
+                m_status = 2;
+                emit updateStatus(2);
+            }
+        }
 	}
 	else if (message[0] == 'S' && message[1] == 'N' && message[2] == 'D')
 	{

plugins/samplesource/kiwisdr/kiwisdrworker.h

@@ -22,13 +22,36 @@
 #include <QtWebSockets/QtWebSockets>
 
 #include "dsp/samplesinkfifo.h"
+#include "util/message.h"
+
+class MessageQueue;
 
 class KiwiSDRWorker : public QObject {
 	Q_OBJECT
 
 public:
+	class MsgReportSampleRate : public Message {
+		MESSAGE_CLASS_DECLARATION
+
+	public:
+		int getSampleRate() const { return m_sampleRate; }
+
+		static MsgReportSampleRate* create(int sampleRate) {
+			return new MsgReportSampleRate(sampleRate);
+		}
+
+	private:
+		int m_sampleRate;
+
+		MsgReportSampleRate(int sampleRate) :
+			Message(),
+			m_sampleRate(sampleRate)
+		{ }
+	};
+
 	KiwiSDRWorker(SampleSinkFifo* sampleFifo);
     int getStatus() const { return m_status; }
+    void setInputMessageQueue(MessageQueue *messageQueue) { m_inputMessageQueue = messageQueue; }
 
 private:
 	QTimer m_timer;
@@ -39,6 +62,8 @@ private:
 
 	QString m_serverAddress;
 	uint64_t m_centerFrequency;
+    int m_sampleRate;
+    MessageQueue *m_inputMessageQueue;
 
 	uint32_t m_gain;
 	bool m_useAGC;