FileInputThread Class Reference

#include <fileinputthread.h>

Inherits QThread.

Collaboration diagram for FileInputThread:

Classes
class	MsgReportEOF

Public Member Functions
	FileInputThread (std::ifstream *samplesStream, SampleSinkFifo *sampleFifo, const QTimer &timer, MessageQueue *fileInputMessageQueue, QObject *parent=NULL)
	~FileInputThread ()
void	startWork ()
void	stopWork ()
void	setSampleRateAndSize (int samplerate, quint32 samplesize)
void	setBuffers (std::size_t chunksize)
bool	isRunning () const
quint64	getSamplesCount () const
void	setSamplesCount (quint64 samplesCount)

Private Slots
void	tick ()

Private Member Functions
void	run ()
void	writeToSampleFifo (const quint8 *buf, qint32 nbBytes)

Private Attributes
QMutex	m_startWaitMutex
QWaitCondition	m_startWaiter
volatile bool	m_running
std::ifstream *	m_ifstream
quint8 *	m_fileBuf
quint8 *	m_convertBuf
std::size_t	m_bufsize
qint64	m_chunksize
SampleSinkFifo *	m_sampleFifo
quint64	m_samplesCount
const QTimer &	m_timer
MessageQueue *	m_fileInputMessageQueue
int	m_samplerate
	File I/Q stream original sample rate. More...
quint64	m_samplesize
	File effective sample size in bits (I or Q). Ex: 16, 24. More...
quint64	m_samplebytes
	Number of bytes used to store a I or Q sample. Ex: 2. 4. More...
qint64	m_throttlems
QElapsedTimer	m_elapsedTimer
bool	m_throttleToggle

Detailed Description

Definition at line 38 of file fileinputthread.h.

Constructor & Destructor Documentation

FileInputThread()

FileInputThread::FileInputThread	(	std::ifstream *	samplesStream,
		SampleSinkFifo *	sampleFifo,
		const QTimer &	timer,
		MessageQueue *	fileInputMessageQueue,
		QObject *	parent = NULL
	)

Definition at line 30 of file fileinputthread.cpp.

Referenced by FileInputThread::MsgReportEOF::MsgReportEOF().

                         :
    QThread(parent),
    m_running(false),
    m_ifstream(samplesStream),
    m_fileBuf(0),
    m_convertBuf(0),
    m_bufsize(0),
    m_chunksize(0),
    m_sampleFifo(sampleFifo),
    m_samplesCount(0),
    m_timer(timer),
    m_fileInputMessageQueue(fileInputMessageQueue),
    m_samplerate(0),
    m_samplesize(0),
    m_samplebytes(0),
    m_throttlems(FILESOURCE_THROTTLE_MS),
    m_throttleToggle(false)
{
    assert(m_ifstream != 0);
}

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~FileInputThread()

FileInputThread::~FileInputThread

(

)

Definition at line 55 of file fileinputthread.cpp.

References m_convertBuf, m_fileBuf, m_running, and stopWork().

Referenced by FileInputThread::MsgReportEOF::MsgReportEOF().

{
    if (m_running) {
        stopWork();
    }

    if (m_fileBuf != 0) {
        free(m_fileBuf);
    }

    if (m_convertBuf != 0) {
        free(m_convertBuf);
    }
}

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Member Function Documentation

getSamplesCount()

quint64 FileInputThread::getSamplesCount ( ) const

inline

Definition at line 68 of file fileinputthread.h.

References m_samplesCount.

Referenced by FileInput::handleMessage(), and FileInput::webapiFormatDeviceReport().

{ return m_samplesCount; }

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isRunning()

bool FileInputThread::isRunning ( ) const

inline

Definition at line 67 of file fileinputthread.h.

References m_running.

Referenced by FileInput::seekFileStream().

{ return m_running; }

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run()

void FileInputThread::run ( )

private

Definition at line 162 of file fileinputthread.cpp.

References m_running, and m_startWaiter.

{
    m_running = true;
    m_startWaiter.wakeAll();

    while(m_running) // actual work is in the tick() function
    {
        sleep(1);
    }

    m_running = false;
}

setBuffers()

void FileInputThread::setBuffers

(

std::size_t

chunksize

)

Definition at line 124 of file fileinputthread.cpp.

References m_bufsize, m_convertBuf, m_fileBuf, and m_samplebytes.

Referenced by FileInputThread::MsgReportEOF::MsgReportEOF(), setSampleRateAndSize(), and tick().

{
    if (chunksize > m_bufsize)
    {
        m_bufsize = chunksize;
        int nbSamples = m_bufsize/(2 * m_samplebytes);

        if (m_fileBuf == 0)
        {
            qDebug() << "FileInputThread::setBuffers: Allocate file buffer";
            m_fileBuf = (quint8*) malloc(m_bufsize);
        }
        else
        {
            qDebug() << "FileInputThread::setBuffers: Re-allocate file buffer";
            quint8 *buf = m_fileBuf;
            m_fileBuf = (quint8*) realloc((void*) m_fileBuf, m_bufsize);
            if (!m_fileBuf) free(buf);
        }

        if (m_convertBuf == 0)
        {
            qDebug() << "FileInputThread::setBuffers: Allocate conversion buffer";
            m_convertBuf = (quint8*) malloc(nbSamples*sizeof(Sample));
        }
        else
        {
            qDebug() << "FileInputThread::setBuffers: Re-allocate conversion buffer";
            quint8 *buf = m_convertBuf;
            m_convertBuf = (quint8*) realloc((void*) m_convertBuf, nbSamples*sizeof(Sample));
            if (!m_convertBuf) free(buf);
        }

        qDebug() << "FileInputThread::setBuffers: size: " << m_bufsize
                << " #samples: " << nbSamples;
    }
}

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setSampleRateAndSize()

void FileInputThread::setSampleRateAndSize	(	int	samplerate,
		quint32	samplesize
	)

Definition at line 99 of file fileinputthread.cpp.

References m_chunksize, m_running, m_samplebytes, m_samplerate, m_samplesize, m_throttlems, setBuffers(), and stopWork().

Referenced by FileInput::applySettings(), FileInputThread::MsgReportEOF::MsgReportEOF(), and FileInput::start().

{
    qDebug() << "FileInputThread::setSampleRateAndSize:"
            << " new rate:" << samplerate
            << " new size:" << samplesize
            << " old rate:" << m_samplerate
            << " old size:" << m_samplesize;

    if ((samplerate != m_samplerate) || (samplesize != m_samplesize))
    {
        if (m_running) {
            stopWork();
        }

        m_samplerate = samplerate;
        m_samplesize = samplesize;
        m_samplebytes = m_samplesize > 16 ? sizeof(int32_t) : sizeof(int16_t);
        m_chunksize = (m_samplerate * 2 * m_samplebytes * m_throttlems) / 1000;

        setBuffers(m_chunksize);
    }

    //m_samplerate = samplerate;
}

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setSamplesCount()

void FileInputThread::setSamplesCount ( quint64  samplesCount )

inline

Definition at line 69 of file fileinputthread.h.

References m_samplesCount.

Referenced by FileInput::seekFileStream().

{ m_samplesCount = samplesCount; }

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startWork()

void FileInputThread::startWork

(

)

Definition at line 70 of file fileinputthread.cpp.

References m_elapsedTimer, m_ifstream, m_running, m_startWaiter, m_startWaitMutex, m_timer, and tick().

Referenced by FileInput::handleMessage(), FileInputThread::MsgReportEOF::MsgReportEOF(), and FileInput::start().

{
    qDebug() << "FileInputThread::startWork: ";

    if (m_ifstream->is_open())
    {
        qDebug() << "FileInputThread::startWork: file stream open, starting...";
        m_startWaitMutex.lock();
        m_elapsedTimer.start();
        start();
        while(!m_running)
            m_startWaiter.wait(&m_startWaitMutex, 100);
        m_startWaitMutex.unlock();
        connect(&m_timer, SIGNAL(timeout()), this, SLOT(tick()));
    }
    else
    {
        qDebug() << "FileInputThread::startWork: file stream closed, not starting.";
    }
}

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stopWork()

void FileInputThread::stopWork

(

)

Definition at line 91 of file fileinputthread.cpp.

References m_running, m_timer, and tick().

Referenced by FileInput::handleMessage(), FileInputThread::MsgReportEOF::MsgReportEOF(), setSampleRateAndSize(), FileInput::stop(), and ~FileInputThread().

{
    qDebug() << "FileInputThread::stopWork";
    disconnect(&m_timer, SIGNAL(timeout()), this, SLOT(tick()));
    m_running = false;
    wait();
}

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tick

void FileInputThread::tick ( )

privateslot

Definition at line 175 of file fileinputthread.cpp.

References FileInputThread::MsgReportEOF::create(), m_chunksize, m_elapsedTimer, m_fileBuf, m_fileInputMessageQueue, m_ifstream, m_running, m_samplebytes, m_samplerate, m_samplesCount, m_throttlems, m_throttleToggle, MessageQueue::push(), setBuffers(), and writeToSampleFifo().

Referenced by startWork(), and stopWork().

{
    if (m_running)
    {
        qint64 throttlems = m_elapsedTimer.restart();

        if (throttlems != m_throttlems)
        {
            m_throttlems = throttlems;
            m_chunksize = 2 * m_samplebytes * ((m_samplerate * (m_throttlems+(m_throttleToggle ? 1 : 0))) / 1000);
            m_throttleToggle = !m_throttleToggle;
            setBuffers(m_chunksize);
        }

        // read samples directly feeding the SampleFifo (no callback)
        m_ifstream->read(reinterpret_cast<char*>(m_fileBuf), m_chunksize);

        if (m_ifstream->eof())
        {
            writeToSampleFifo(m_fileBuf, (qint32) m_ifstream->gcount());
            MsgReportEOF *message = MsgReportEOF::create();
            m_fileInputMessageQueue->push(message);
        }
        else
        {
            writeToSampleFifo(m_fileBuf, (qint32) m_chunksize);
            m_samplesCount += m_chunksize / (2 * m_samplebytes);
        }
    }
}

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writeToSampleFifo()

void FileInputThread::writeToSampleFifo ( const quint8 *  buf, qint32  nbBytes  )

private

Definition at line 206 of file fileinputthread.cpp.

References m_convertBuf, m_samplebytes, m_sampleFifo, m_samplesize, SDR_RX_SAMP_SZ, and SampleSinkFifo::write().

Referenced by tick().

{
    if (m_samplesize == 16)
    {
        if (SDR_RX_SAMP_SZ == 16)
        {
            m_sampleFifo->write(buf, nbBytes);
        }
        else if (SDR_RX_SAMP_SZ == 24)
        {
            FixReal *convertBuf = (FixReal *) m_convertBuf;
            const int16_t *fileBuf = (int16_t *) buf;
            int nbSamples = nbBytes / (2 * m_samplebytes);

            for (int is = 0; is < nbSamples; is++)
            {
                convertBuf[2*is]   = fileBuf[2*is] << 8;
                convertBuf[2*is+1] = fileBuf[2*is+1] << 8;
            }

            m_sampleFifo->write((quint8*) convertBuf, nbSamples*sizeof(Sample));
        }
    }
    else if (m_samplesize == 24)
    {
        if (SDR_RX_SAMP_SZ == 24)
        {
            m_sampleFifo->write(buf, nbBytes);
        }
        else if (SDR_RX_SAMP_SZ == 16)
        {
            FixReal *convertBuf = (FixReal *) m_convertBuf;
            const int32_t *fileBuf = (int32_t *) buf;
            int nbSamples = nbBytes / (2 * m_samplebytes);

            for (int is = 0; is < nbSamples; is++)
            {
                convertBuf[2*is]   = fileBuf[2*is] >> 8;
                convertBuf[2*is+1] = fileBuf[2*is+1] >> 8;
            }

            m_sampleFifo->write((quint8*) convertBuf, nbSamples*sizeof(Sample));
        }
    }
}

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Member Data Documentation

m_bufsize

std::size_t FileInputThread::m_bufsize

private

Definition at line 79 of file fileinputthread.h.

Referenced by setBuffers().

m_chunksize

qint64 FileInputThread::m_chunksize

private

Definition at line 80 of file fileinputthread.h.

Referenced by setSampleRateAndSize(), and tick().

m_convertBuf

quint8* FileInputThread::m_convertBuf

private

Definition at line 78 of file fileinputthread.h.

Referenced by setBuffers(), writeToSampleFifo(), and ~FileInputThread().

m_elapsedTimer

QElapsedTimer FileInputThread::m_elapsedTimer

private

Definition at line 90 of file fileinputthread.h.

Referenced by startWork(), and tick().

m_fileBuf

quint8* FileInputThread::m_fileBuf

private

Definition at line 77 of file fileinputthread.h.

Referenced by setBuffers(), tick(), and ~FileInputThread().

m_fileInputMessageQueue

MessageQueue* FileInputThread::m_fileInputMessageQueue

private

Definition at line 84 of file fileinputthread.h.

Referenced by tick().

m_ifstream

std::ifstream* FileInputThread::m_ifstream

private

Definition at line 76 of file fileinputthread.h.

Referenced by startWork(), and tick().

m_running

volatile bool FileInputThread::m_running

private

Definition at line 74 of file fileinputthread.h.

Referenced by isRunning(), run(), setSampleRateAndSize(), startWork(), stopWork(), tick(), and ~FileInputThread().

m_samplebytes

quint64 FileInputThread::m_samplebytes

private

Number of bytes used to store a I or Q sample. Ex: 2. 4.

Definition at line 88 of file fileinputthread.h.

Referenced by setBuffers(), setSampleRateAndSize(), tick(), and writeToSampleFifo().

m_sampleFifo

SampleSinkFifo* FileInputThread::m_sampleFifo

private

Definition at line 81 of file fileinputthread.h.

Referenced by writeToSampleFifo().

m_samplerate

int FileInputThread::m_samplerate

private

File I/Q stream original sample rate.

Definition at line 86 of file fileinputthread.h.

Referenced by setSampleRateAndSize(), and tick().

m_samplesCount

quint64 FileInputThread::m_samplesCount

private

Definition at line 82 of file fileinputthread.h.

Referenced by getSamplesCount(), setSamplesCount(), and tick().

m_samplesize

quint64 FileInputThread::m_samplesize

private

File effective sample size in bits (I or Q). Ex: 16, 24.

Definition at line 87 of file fileinputthread.h.

Referenced by setSampleRateAndSize(), and writeToSampleFifo().

m_startWaiter

QWaitCondition FileInputThread::m_startWaiter

private

Definition at line 73 of file fileinputthread.h.

Referenced by run(), and startWork().

m_startWaitMutex

QMutex FileInputThread::m_startWaitMutex

private

Definition at line 72 of file fileinputthread.h.

Referenced by startWork().

m_throttlems

qint64 FileInputThread::m_throttlems

private

Definition at line 89 of file fileinputthread.h.

Referenced by setSampleRateAndSize(), and tick().

m_throttleToggle

bool FileInputThread::m_throttleToggle

private

Definition at line 91 of file fileinputthread.h.

Referenced by tick().

m_timer

const QTimer& FileInputThread::m_timer

private

Definition at line 83 of file fileinputthread.h.

Referenced by startWork(), and stopWork().

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The documentation for this class was generated from the following files:

• plugins/samplesource/fileinput/fileinputthread.h
• plugins/samplesource/fileinput/fileinputthread.cpp