File source plugin: added seek bar to move the current pointer in the file

plugins/samplesource/filesource/filesourcegui.cpp

@@ -41,7 +41,8 @@ FileSourceGui::FileSourceGui(PluginAPI* pluginAPI, QWidget* parent) :
 	m_recordLength(0),
 	m_startingTimeStamp(0),
 	m_samplesCount(0),
-	m_tickCount(0)
+	m_tickCount(0),
+	m_enableNavTime(false)
 {
 	ui->setupUi(this);
 	ui->centerFrequency->setColorMapper(ColorMapper(ColorMapper::ReverseGold));
@@ -180,6 +181,23 @@ void FileSourceGui::on_play_toggled(bool checked)
 {
 	FileSourceInput::MsgConfigureFileSourceWork* message = FileSourceInput::MsgConfigureFileSourceWork::create(checked);
 	m_sampleSource->getInputMessageQueue()->push(message);
+	ui->navTimeSlider->setEnabled(!checked);
+	m_enableNavTime = !checked;
+}
+
+void FileSourceGui::on_navTimeSlider_valueChanged(int value)
+{
+	if (m_enableNavTime && ((value >= 0) && (value <= 100)))
+	{
+		int t_sec = (m_recordLength * value) / 100;
+		QTime t(0, 0, 0, 0);
+		t = t.addSecs(t_sec);
+		QString s_time = t.toString("hh:mm:ss");
+		ui->navTimeText->setText(s_time);
+
+		FileSourceInput::MsgConfigureFileSourceSeek* message = FileSourceInput::MsgConfigureFileSourceSeek::create(value);
+		m_sampleSource->getInputMessageQueue()->push(message);
+	}
 }
 
 void FileSourceGui::on_showFileDialog_clicked(bool checked)
@@ -245,9 +263,13 @@ void FileSourceGui::updateWithStreamTime()
 	dt = dt.addMSecs(t_msec);
 	QString s_date = dt.toString("yyyy-MM-dd hh:mm:ss.zzz");
 	ui->absTimeText->setText(s_date);
-	float posRatio = (float) t_sec / (float) m_recordLength;
-	ui->navTimeSlider->setValue((int) (posRatio * 100.0));
-	ui->navTimeText->setText(s_time);
+
+	if (!m_enableNavTime)
+	{
+		float posRatio = (float) t_sec / (float) m_recordLength;
+		ui->navTimeSlider->setValue((int) (posRatio * 100.0));
+		ui->navTimeText->setText(s_time);
+	}
 }
 
 void FileSourceGui::tick()

plugins/samplesource/filesource/filesourcegui.h

@@ -62,6 +62,7 @@ private:
 	std::time_t m_startingTimeStamp;
 	int m_samplesCount;
 	std::size_t m_tickCount;
+	bool m_enableNavTime;
 
 	void displaySettings();
 	void displayTime();
@@ -76,6 +77,7 @@ private slots:
 	void handleSourceMessages();
 	void on_playLoop_toggled(bool checked);
 	void on_play_toggled(bool checked);
+	void on_navTimeSlider_valueChanged(int value);
 	void on_showFileDialog_clicked(bool checked);
 	void tick();
 };

plugins/samplesource/filesource/filesourceinput.cpp

@@ -30,6 +30,7 @@
 MESSAGE_CLASS_DEFINITION(FileSourceInput::MsgConfigureFileSource, Message)
 MESSAGE_CLASS_DEFINITION(FileSourceInput::MsgConfigureFileSourceName, Message)
 MESSAGE_CLASS_DEFINITION(FileSourceInput::MsgConfigureFileSourceWork, Message)
+MESSAGE_CLASS_DEFINITION(FileSourceInput::MsgConfigureFileSourceSeek, Message)
 MESSAGE_CLASS_DEFINITION(FileSourceInput::MsgConfigureFileSourceStreamTiming, Message)
 MESSAGE_CLASS_DEFINITION(FileSourceInput::MsgReportFileSourceAcquisition, Message)
 MESSAGE_CLASS_DEFINITION(FileSourceInput::MsgReportFileSourceStreamData, Message)
@@ -124,6 +125,20 @@ void FileSourceInput::openFileStream()
 	getOutputMessageQueueToGUI()->push(report);
 }
 
+void FileSourceInput::seekFileStream(int seekPercentage)
+{
+	QMutexLocker mutexLocker(&m_mutex);
+
+	if ((m_ifstream.is_open()) && !m_fileSourceThread->isRunning())
+	{
+		int seekPoint = ((m_recordLength * seekPercentage) / 100) * m_sampleRate;
+		m_fileSourceThread->setSamplesCount(seekPoint);
+		seekPoint *= 4; // + sizeof(FileSink::Header)
+		m_ifstream.clear();
+		m_ifstream.seekg(seekPoint, std::ios::beg);
+	}
+}
+
 bool FileSourceInput::init(const Message& message)
 {
 	return false;
@@ -224,9 +239,10 @@ bool FileSourceInput::handleMessage(const Message& message)
 			if (working)
 			{
 				m_fileSourceThread->startWork();
+				/*
 				MsgReportFileSourceStreamTiming *report =
 						MsgReportFileSourceStreamTiming::create(m_fileSourceThread->getSamplesCount());
-				getOutputMessageQueueToGUI()->push(report);
+				getOutputMessageQueueToGUI()->push(report);*/
 			}
 			else
 			{
@@ -236,6 +252,14 @@ bool FileSourceInput::handleMessage(const Message& message)
 
 		return true;
 	}
+	else if (MsgConfigureFileSourceSeek::match(message))
+	{
+		MsgConfigureFileSourceSeek& conf = (MsgConfigureFileSourceSeek&) message;
+		int seekPercentage = conf.getPercentage();
+		seekFileStream(seekPercentage);
+
+		return true;
+	}
 	else if (MsgConfigureFileSourceStreamTiming::match(message))
 	{
 		MsgReportFileSourceStreamTiming *report;

plugins/samplesource/filesource/filesourceinput.h

@@ -114,6 +114,26 @@ public:
 		{ }
 	};
 
+	class MsgConfigureFileSourceSeek : public Message {
+		MESSAGE_CLASS_DECLARATION
+
+	public:
+		int getPercentage() const { return m_seekPercentage; }
+
+		static MsgConfigureFileSourceSeek* create(int seekPercentage)
+		{
+			return new MsgConfigureFileSourceSeek(seekPercentage);
+		}
+
+	protected:
+		int m_seekPercentage; //!< percentage of seek position from the beginning 0..100
+
+		MsgConfigureFileSourceSeek(int seekPercentage) :
+			Message(),
+			m_seekPercentage(seekPercentage)
+		{ }
+	};
+
 	class MsgReportFileSourceAcquisition : public Message {
 		MESSAGE_CLASS_DECLARATION
 
@@ -217,6 +237,7 @@ private:
 	const QTimer& m_masterTimer;
 
 	void openFileStream();
+	void seekFileStream(int seekPercentage);
 };
 
 #endif // INCLUDE_FILESOURCEINPUT_H

plugins/samplesource/filesource/filesourcethread.cpp

@@ -55,7 +55,7 @@ void FileSourceThread::startWork()
     
     if (m_ifstream->is_open())
     {
-        qDebug() << "  - file stream open, starting...";
+        qDebug() << "FileSourceThread::startWork: file stream open, starting...";
         m_startWaitMutex.lock();
         start();
         while(!m_running)
@@ -64,7 +64,7 @@ void FileSourceThread::startWork()
     }
     else
     {
-        qDebug() << "  - file stream closed, not starting.";
+        qDebug() << "FileSourceThread::startWork: file stream closed, not starting.";
     }
 }
 
@@ -151,27 +151,3 @@ void FileSourceThread::tick()
         }
 	}
 }
-
-
-/*
-void FileSourceThread::decimate1(SampleVector::iterator* it, const qint16* buf, qint32 len)
-{
-	qint16 xreal, yimag;
-
-	for (int pos = 0; pos < len; pos += 2) {
-		xreal = buf[pos+0];
-		yimag = buf[pos+1];
-		Sample s( xreal * 16, yimag * 16 ); // shift by 4 bit positions (signed)
-		**it = s;
-		(*it)++;
-	}
-}
-
-//  Decimate according to specified log2 (ex: log2=4 => decim=16)
-void FileSourceThread::callback(const qint16* buf, qint32 len)
-{
-	SampleVector::iterator it = m_convertBuffer.begin();
-	decimate1(&it, buf, len);
-	m_sampleFifo->write(m_convertBuffer.begin(), it);
-}
-*/

plugins/samplesource/filesource/filesourcethread.h

@@ -41,6 +41,7 @@ public:
 	void setSamplerate(int samplerate);
 	bool isRunning() const { return m_running; }
 	std::size_t getSamplesCount() const { return m_samplesCount; }
+	void setSamplesCount(int samplesCount) { m_samplesCount = samplesCount; }
 
 	void connectTimer(const QTimer& timer);