LimeSDROutputThread Class Reference

#include <limesdroutputthread.h>

Inheritance diagram for LimeSDROutputThread:

Collaboration diagram for LimeSDROutputThread:

Public Member Functions
	LimeSDROutputThread (lms_stream_t *stream, SampleSourceFifo *sampleFifo, QObject *parent=0)
	~LimeSDROutputThread ()
virtual void	startWork ()
virtual void	stopWork ()
virtual void	setDeviceSampleRate (int sampleRate)
virtual bool	isRunning ()
void	setLog2Interpolation (unsigned int log2_ioterp)

Private Member Functions
void	run ()
void	callback (qint16 *buf, qint32 len)

Private Attributes
QMutex	m_startWaitMutex
QWaitCondition	m_startWaiter
bool	m_running
lms_stream_t *	m_stream
qint16	m_buf [2 *LIMESDROUTPUT_BLOCKSIZE]
SampleSourceFifo *	m_sampleFifo
unsigned int	m_log2Interp
Interpolators< qint16, SDR_TX_SAMP_SZ, 12 >	m_interpolators

Detailed Description

Definition at line 33 of file limesdroutputthread.h.

Constructor & Destructor Documentation

LimeSDROutputThread()

LimeSDROutputThread::LimeSDROutputThread	(	lms_stream_t *	stream,
		SampleSourceFifo *	sampleFifo,
		QObject *	parent = 0
	)

Definition at line 24 of file limesdroutputthread.cpp.

References LIMESDROUTPUT_BLOCKSIZE, and m_buf.

                                                                                                            :
    QThread(parent),
    m_running(false),
    m_stream(stream),
    m_sampleFifo(sampleFifo),
    m_log2Interp(0)
{
    std::fill(m_buf, m_buf + 2*LIMESDROUTPUT_BLOCKSIZE, 0);
}

~LimeSDROutputThread()

LimeSDROutputThread::~LimeSDROutputThread

(

)

Definition at line 34 of file limesdroutputthread.cpp.

References stopWork().

{
    stopWork();
}

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Member Function Documentation

callback()

void LimeSDROutputThread::callback ( qint16 *  buf, qint32  len  )

private

Definition at line 109 of file limesdroutputthread.cpp.

References Interpolators< T, SdrBits, OutputBits >::interpolate1(), Interpolators< T, SdrBits, OutputBits >::interpolate16_cen(), Interpolators< T, SdrBits, OutputBits >::interpolate2_cen(), Interpolators< T, SdrBits, OutputBits >::interpolate32_cen(), Interpolators< T, SdrBits, OutputBits >::interpolate4_cen(), Interpolators< T, SdrBits, OutputBits >::interpolate64_cen(), Interpolators< T, SdrBits, OutputBits >::interpolate8_cen(), m_interpolators, m_log2Interp, m_sampleFifo, and SampleSourceFifo::readAdvance().

Referenced by run().

{
    SampleVector::iterator beginRead;
    m_sampleFifo->readAdvance(beginRead, len/(1<<m_log2Interp));
    beginRead -= len;

    if (m_log2Interp == 0)
    {
        m_interpolators.interpolate1(&beginRead, buf, len*2);
    }
    else
    {
        switch (m_log2Interp)
        {
        case 1:
            m_interpolators.interpolate2_cen(&beginRead, buf, len*2);
            break;
        case 2:
            m_interpolators.interpolate4_cen(&beginRead, buf, len*2);
            break;
        case 3:
            m_interpolators.interpolate8_cen(&beginRead, buf, len*2);
            break;
        case 4:
            m_interpolators.interpolate16_cen(&beginRead, buf, len*2);
            break;
        case 5:
            m_interpolators.interpolate32_cen(&beginRead, buf, len*2);
            break;
        case 6:
            m_interpolators.interpolate64_cen(&beginRead, buf, len*2);
            break;
        default:
            break;
        }
    }
}

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isRunning()

virtual bool LimeSDROutputThread::isRunning ( )

inlinevirtual

Implements DeviceLimeSDRShared::ThreadInterface.

Definition at line 44 of file limesdroutputthread.h.

References m_running, and setLog2Interpolation().

Referenced by LimeSDROutput::applySettings().

{ return m_running; }

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run()

void LimeSDROutputThread::run ( )

private

Definition at line 77 of file limesdroutputthread.cpp.

References callback(), LIMESDROUTPUT_BLOCKSIZE, m_buf, m_running, m_startWaiter, and m_stream.

{
    int res;

    lms_stream_meta_t metadata;          //Use metadata for additional control over sample receive function behaviour
    metadata.flushPartialPacket = false; //Do not discard data remainder when read size differs from packet size
    metadata.waitForTimestamp = false;   //Do not wait for specific timestamps

    m_running = true;
    m_startWaiter.wakeAll();

    while (m_running)
    {
        callback(m_buf, LIMESDROUTPUT_BLOCKSIZE);

        res = LMS_SendStream(m_stream, (void *) m_buf, LIMESDROUTPUT_BLOCKSIZE, &metadata, 1000000);

        if (res < 0)
        {
            qCritical("LimeSDROutputThread::run write error: %s", strerror(errno));
            break;
        }
        else if (res != LIMESDROUTPUT_BLOCKSIZE)
        {
            qDebug("LimeSDROutputThread::run written %d/%d samples", res, LIMESDROUTPUT_BLOCKSIZE);
        }
    }

    m_running = false;
}

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setDeviceSampleRate()

virtual void LimeSDROutputThread::setDeviceSampleRate ( int  sampleRate )

inlinevirtual

Implements DeviceLimeSDRShared::ThreadInterface.

Definition at line 43 of file limesdroutputthread.h.

{ (void) sampleRate; }

setLog2Interpolation()

void LimeSDROutputThread::setLog2Interpolation

(

unsigned int

log2_ioterp

)

Definition at line 72 of file limesdroutputthread.cpp.

References m_log2Interp.

Referenced by LimeSDROutput::applySettings(), isRunning(), and LimeSDROutput::start().

{
    m_log2Interp = log2_interp;
}

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startWork()

void LimeSDROutputThread::startWork ( )

virtual

Implements DeviceLimeSDRShared::ThreadInterface.

Definition at line 39 of file limesdroutputthread.cpp.

References m_running, m_startWaiter, m_startWaitMutex, and m_stream.

Referenced by LimeSDROutput::applySettings(), and LimeSDROutput::start().

{
    if (m_running) return; // return if running already

    if (LMS_StartStream(m_stream) < 0) {
        qCritical("LimeSDROutputThread::startWork: could not start stream");
    } else {
        usleep(50000);
        qDebug("LimeSDROutputThread::startWork: stream started");
    }

    m_startWaitMutex.lock();
    start();
    while(!m_running)
        m_startWaiter.wait(&m_startWaitMutex, 100);
    m_startWaitMutex.unlock();
}

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stopWork()

void LimeSDROutputThread::stopWork ( )

virtual

Implements DeviceLimeSDRShared::ThreadInterface.

Definition at line 57 of file limesdroutputthread.cpp.

References m_running, and m_stream.

Referenced by LimeSDROutput::applySettings(), LimeSDROutput::stop(), and ~LimeSDROutputThread().

{
    if (!m_running) return; // return if not running

    m_running = false;
    wait();

    if (LMS_StopStream(m_stream) < 0) {
        qCritical("LimeSDROutputThread::stopWork: could not stop stream");
    } else {
        usleep(50000);
        qDebug("LimeSDROutputThread::stopWork: stream stopped");
    }
}

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Member Data Documentation

m_buf

qint16 LimeSDROutputThread::m_buf[2 *LIMESDROUTPUT_BLOCKSIZE]

private

Definition at line 53 of file limesdroutputthread.h.

Referenced by LimeSDROutputThread(), and run().

m_interpolators

Interpolators<qint16, SDR_TX_SAMP_SZ, 12> LimeSDROutputThread::m_interpolators

private

Definition at line 58 of file limesdroutputthread.h.

Referenced by callback().

m_log2Interp

unsigned int LimeSDROutputThread::m_log2Interp

private

Definition at line 56 of file limesdroutputthread.h.

Referenced by callback(), and setLog2Interpolation().

m_running

bool LimeSDROutputThread::m_running

private

Definition at line 50 of file limesdroutputthread.h.

Referenced by isRunning(), run(), startWork(), and stopWork().

m_sampleFifo

SampleSourceFifo* LimeSDROutputThread::m_sampleFifo

private

Definition at line 54 of file limesdroutputthread.h.

Referenced by callback().

m_startWaiter

QWaitCondition LimeSDROutputThread::m_startWaiter

private

Definition at line 49 of file limesdroutputthread.h.

Referenced by run(), and startWork().

m_startWaitMutex

QMutex LimeSDROutputThread::m_startWaitMutex

private

Definition at line 48 of file limesdroutputthread.h.

Referenced by startWork().

m_stream

lms_stream_t* LimeSDROutputThread::m_stream

private

Definition at line 52 of file limesdroutputthread.h.

Referenced by run(), startWork(), and stopWork().

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

• plugins/samplesink/limesdroutput/limesdroutputthread.h
• plugins/samplesink/limesdroutput/limesdroutputthread.cpp