AMBEWorker Class Reference

#include <ambeworker.h>

Inherits QObject.

Collaboration diagram for AMBEWorker:

Classes
class	MsgMbeDecode
class	MsgTest

Public Slots
void	handleInputMessages ()

Signals
void	finished ()

Public Member Functions
	AMBEWorker ()
	~AMBEWorker ()
void	pushMbeFrame (const unsigned char *mbeFrame, int mbeRateIndex, int mbeVolumeIndex, unsigned char channels, bool useHP, int upsampling, AudioFifo *audioFifo)
bool	open (const std::string &deviceRef)
	Either serial device or ip:port. More...
void	close ()
void	process ()
void	stop ()
bool	isAvailable ()
bool	hasFifo (AudioFifo *audioFifo)
void	postTest ()

Public Attributes
MessageQueue	m_inputMessageQueue
	Queue for asynchronous inbound communication. More...

Private Member Functions
void	upsample (int upsampling, short *in, int nbSamplesIn, unsigned char channels)
void	noUpsample (short *in, int nbSamplesIn, unsigned char channels)
void	setVolumeFactors ()

Private Attributes
SerialDV::DVController	m_dvController
AudioFifo *	m_audioFifo
QDateTime	m_timestamp
volatile bool	m_running
int	m_currentGainIn
int	m_currentGainOut
short	m_dvAudioSamples [SerialDV::MBE_AUDIO_BLOCK_SIZE]
AudioVector	m_audioBuffer
uint	m_audioBufferFill
float	m_upsamplerLastValue
float	m_phase
MBEAudioInterpolatorFilter	m_upsampleFilter
int	m_upsampling
float	m_volume
float	m_upsamplingFactors [7]
AudioCompressor	m_compressor

Detailed Description

Definition at line 37 of file ambeworker.h.

Constructor & Destructor Documentation

AMBEWorker()

AMBEWorker::AMBEWorker

(

)

Definition at line 29 of file ambeworker.cpp.

                       :
    m_running(false),
    m_currentGainIn(0),
    m_currentGainOut(0),
    m_upsamplerLastValue(0.0f),
    m_phase(0),
    m_upsampling(1),
    m_volume(1.0f)
{
    m_audioBuffer.resize(48000);
    m_audioBufferFill = 0;
    m_audioFifo = 0;
    std::fill(m_dvAudioSamples, m_dvAudioSamples+SerialDV::MBE_AUDIO_BLOCK_SIZE, 0);
    setVolumeFactors();
}

~AMBEWorker()

AMBEWorker::~AMBEWorker

(

)

Definition at line 45 of file ambeworker.cpp.

{}

Member Function Documentation

close()

void AMBEWorker::close

(

)

Definition at line 53 of file ambeworker.cpp.

References m_dvController.

Referenced by AMBEEngine::scan().

{
    m_dvController.close();
}

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finished

void AMBEWorker::finished ( )

signal

Referenced by process().

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handleInputMessages

void AMBEWorker::handleInputMessages ( )

slot

Definition at line 77 of file ambeworker.cpp.

References MessageQueue::clear(), AMBEWorker::MsgMbeDecode::getAudioFifo(), AMBEWorker::MsgMbeDecode::getChannels(), AMBEWorker::MsgMbeDecode::getMbeFrame(), AMBEWorker::MsgMbeDecode::getMbeRate(), AMBEWorker::MsgMbeDecode::getUpsampling(), AMBEWorker::MsgMbeDecode::getUseHP(), AMBEWorker::MsgMbeDecode::getVolumeIndex(), m_audioBuffer, m_audioBufferFill, m_dvAudioSamples, m_dvController, m_inputMessageQueue, m_timestamp, m_upsampleFilter, m_upsampling, m_volume, Message::match(), noUpsample(), MessageQueue::pop(), setVolumeFactors(), MessageQueue::size(), upsample(), MBEAudioInterpolatorFilter::useHP(), and AudioFifo::write().

{
    Message* message;
    m_audioBufferFill = 0;
    AudioFifo *audioFifo = 0;

    while ((message = m_inputMessageQueue.pop()) != 0)
    {
        if (MsgMbeDecode::match(*message))
        {
            MsgMbeDecode *decodeMsg = (MsgMbeDecode *) message;
            int dBVolume = (decodeMsg->getVolumeIndex() - 30) / 4;
            float volume = pow(10.0, dBVolume / 10.0f);
            int upsampling = decodeMsg->getUpsampling();
            upsampling = upsampling > 6 ? 6 : upsampling < 1 ? 1 : upsampling;

            if ((volume != m_volume) || (upsampling != m_upsampling))
            {
                m_volume = volume;
                m_upsampling = upsampling;
                setVolumeFactors();
            }

            m_upsampleFilter.useHP(decodeMsg->getUseHP());

            if (m_dvController.decode(m_dvAudioSamples, decodeMsg->getMbeFrame(), decodeMsg->getMbeRate()))
            {
                if (upsampling > 1) {
                    upsample(upsampling, m_dvAudioSamples, SerialDV::MBE_AUDIO_BLOCK_SIZE, decodeMsg->getChannels());
                } else {
                    noUpsample(m_dvAudioSamples, SerialDV::MBE_AUDIO_BLOCK_SIZE, decodeMsg->getChannels());
                }

                audioFifo = decodeMsg->getAudioFifo();

                if (audioFifo && (m_audioBufferFill >= m_audioBuffer.size() - 960))
                {
                    uint res = audioFifo->write((const quint8*)&m_audioBuffer[0], m_audioBufferFill);

                    if (res != m_audioBufferFill) {
                        qDebug("AMBEWorker::handleInputMessages: %u/%u audio samples written", res, m_audioBufferFill);
                    }

                    m_audioBufferFill = 0;
                }
            }
            else
            {
                qDebug("AMBEWorker::handleInputMessages: MsgMbeDecode: decode failed");
            }
        }

        delete message;

        if (m_inputMessageQueue.size() > 100)
        {
            qDebug("AMBEWorker::handleInputMessages: MsgMbeDecode: too many messages in queue. Flushing...");
            m_inputMessageQueue.clear();
            break;
        }
    }

    if (audioFifo)
    {
        uint res = audioFifo->write((const quint8*)&m_audioBuffer[0], m_audioBufferFill);

        if (res != m_audioBufferFill) {
            qDebug("AMBEWorker::handleInputMessages: %u/%u audio samples written", res, m_audioBufferFill);
        }

        m_audioBufferFill = 0;
    }

    m_timestamp = QDateTime::currentDateTime();
}

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hasFifo()

bool AMBEWorker::hasFifo

(

AudioFifo *

audioFifo

)

Definition at line 174 of file ambeworker.cpp.

References m_audioFifo.

{
    return m_audioFifo == audioFifo;
}

isAvailable()

bool AMBEWorker::isAvailable

(

)

Definition at line 165 of file ambeworker.cpp.

References m_audioFifo, and m_timestamp.

{
    if (m_audioFifo == 0) {
        return true;
    }

    return m_timestamp.time().msecsTo(QDateTime::currentDateTime().time()) > 1000; // 1 second inactivity timeout
}

noUpsample()

void AMBEWorker::noUpsample ( short *  in, int  nbSamplesIn, unsigned char  channels  )

private

Definition at line 207 of file ambeworker.cpp.

References i, m_audioBuffer, m_audioBufferFill, m_upsampleFilter, m_upsamplingFactors, MBEAudioInterpolatorFilter::runHP(), and MBEAudioInterpolatorFilter::usesHP().

Referenced by handleInputMessages().

{
    for (int i = 0; i < nbSamplesIn; i++)
    {
        float cur = m_upsampleFilter.usesHP() ? m_upsampleFilter.runHP((float) in[i]) : (float) in[i];
        m_audioBuffer[m_audioBufferFill].l = channels & 1 ? cur*m_upsamplingFactors[0] : 0;
        m_audioBuffer[m_audioBufferFill].r = (channels>>1) & 1 ? cur*m_upsamplingFactors[0] : 0;

        if (m_audioBufferFill < m_audioBuffer.size() - 1) {
            ++m_audioBufferFill;
        }
    }

    if (m_audioBufferFill >= m_audioBuffer.size() - 1) {
        qDebug("AMBEWorker::noUpsample: audio buffer is full check its size");
    }
}

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open()

bool AMBEWorker::open

(

const std::string &

deviceRef

)

Either serial device or ip:port.

Definition at line 48 of file ambeworker.cpp.

References m_dvController.

Referenced by AMBEEngine::registerController(), and AMBEEngine::scan().

{
    return m_dvController.open(deviceRef);
}

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postTest()

void AMBEWorker::postTest ( )

inline

Definition at line 119 of file ambeworker.h.

References SWGSDRangel::create().

    {
        //emit inputMessageReady();
        m_inputMessageQueue.push(MsgTest::create());
    }

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process()

void AMBEWorker::process

(

)

Definition at line 58 of file ambeworker.cpp.

References finished(), and m_running.

{
    m_running  = true;
    qDebug("AMBEWorker::process: started");

    while (m_running)
    {
        std::this_thread::sleep_for(std::chrono::seconds(1));
    }

    qDebug("AMBEWorker::process: stopped");
    emit finished();
}

pushMbeFrame()

void AMBEWorker::pushMbeFrame	(	const unsigned char *	mbeFrame,
		int	mbeRateIndex,
		int	mbeVolumeIndex,
		unsigned char	channels,
		bool	useHP,
		int	upsampling,
		AudioFifo *	audioFifo
	)

Definition at line 153 of file ambeworker.cpp.

References AMBEWorker::MsgMbeDecode::create(), m_audioFifo, m_inputMessageQueue, and MessageQueue::push().

{
    m_audioFifo = audioFifo;
    m_inputMessageQueue.push(MsgMbeDecode::create(mbeFrame, mbeRateIndex, mbeVolumeIndex, channels, useHP, upsampling, audioFifo));
}

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setVolumeFactors()

void AMBEWorker::setVolumeFactors ( )

private

Definition at line 225 of file ambeworker.cpp.

References i, m_upsampling, m_upsamplingFactors, and m_volume.

Referenced by handleInputMessages().

{
    m_upsamplingFactors[0] = m_volume;

    for (int i = 1; i <= m_upsampling; i++) {
        m_upsamplingFactors[i] = (i*m_volume) / (float) m_upsampling;
    }
}

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stop()

void AMBEWorker::stop

(

)

Definition at line 72 of file ambeworker.cpp.

References m_running.

{
    m_running = false;
}

upsample()

void AMBEWorker::upsample ( int  upsampling, short *  in, int  nbSamplesIn, unsigned char  channels  )

private

Definition at line 179 of file ambeworker.cpp.

References AudioCompressor::compress(), i, m_audioBuffer, m_audioBufferFill, m_compressor, m_upsampleFilter, m_upsamplerLastValue, m_upsamplingFactors, MBEAudioInterpolatorFilter::runHP(), MBEAudioInterpolatorFilter::runLP(), and MBEAudioInterpolatorFilter::usesHP().

Referenced by handleInputMessages().

{
    for (int i = 0; i < nbSamplesIn; i++)
    {
        //float cur = m_upsampleFilter.usesHP() ? m_upsampleFilter.runHP((float) m_compressor.compress(in[i])) : (float) m_compressor.compress(in[i]);
        float cur = m_upsampleFilter.usesHP() ? m_upsampleFilter.runHP((float) in[i]) : (float) in[i];
        float prev = m_upsamplerLastValue;
        qint16 upsample;

        for (int j = 1; j <= upsampling; j++)
        {
            upsample = (qint16) m_upsampleFilter.runLP(cur*m_upsamplingFactors[j] + prev*m_upsamplingFactors[upsampling-j]);
            m_audioBuffer[m_audioBufferFill].l = channels & 1 ? m_compressor.compress(upsample) : 0;
            m_audioBuffer[m_audioBufferFill].r = (channels>>1) & 1 ? m_compressor.compress(upsample) : 0;

            if (m_audioBufferFill < m_audioBuffer.size() - 1) {
                ++m_audioBufferFill;
            }
        }

        m_upsamplerLastValue = cur;
    }

    if (m_audioBufferFill >= m_audioBuffer.size() - 1) {
        qDebug("AMBEWorker::upsample(%d): audio buffer is full check its size", upsampling);
    }
}

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Member Data Documentation

m_audioBuffer

AudioVector AMBEWorker::m_audioBuffer

private

Definition at line 145 of file ambeworker.h.

Referenced by handleInputMessages(), noUpsample(), and upsample().

m_audioBufferFill

uint AMBEWorker::m_audioBufferFill

private

Definition at line 146 of file ambeworker.h.

Referenced by handleInputMessages(), noUpsample(), and upsample().

m_audioFifo

AudioFifo* AMBEWorker::m_audioFifo

private

Definition at line 139 of file ambeworker.h.

Referenced by hasFifo(), isAvailable(), and pushMbeFrame().

m_compressor

AudioCompressor AMBEWorker::m_compressor

private

Definition at line 153 of file ambeworker.h.

Referenced by upsample().

m_currentGainIn

int AMBEWorker::m_currentGainIn

private

Definition at line 142 of file ambeworker.h.

m_currentGainOut

int AMBEWorker::m_currentGainOut

private

Definition at line 143 of file ambeworker.h.

m_dvAudioSamples

short AMBEWorker::m_dvAudioSamples[SerialDV::MBE_AUDIO_BLOCK_SIZE]

private

Definition at line 144 of file ambeworker.h.

Referenced by handleInputMessages().

m_dvController

SerialDV::DVController AMBEWorker::m_dvController

private

Definition at line 138 of file ambeworker.h.

Referenced by close(), handleInputMessages(), and open().

m_inputMessageQueue

MessageQueue AMBEWorker::m_inputMessageQueue

Queue for asynchronous inbound communication.

Definition at line 125 of file ambeworker.h.

Referenced by handleInputMessages(), and pushMbeFrame().

m_phase

float AMBEWorker::m_phase

private

Definition at line 148 of file ambeworker.h.

m_running

volatile bool AMBEWorker::m_running

private

Definition at line 141 of file ambeworker.h.

Referenced by process(), and stop().

m_timestamp

QDateTime AMBEWorker::m_timestamp

private

Definition at line 140 of file ambeworker.h.

Referenced by handleInputMessages(), and isAvailable().

m_upsampleFilter

MBEAudioInterpolatorFilter AMBEWorker::m_upsampleFilter

private

Definition at line 149 of file ambeworker.h.

Referenced by handleInputMessages(), noUpsample(), and upsample().

m_upsamplerLastValue

float AMBEWorker::m_upsamplerLastValue

private

Definition at line 147 of file ambeworker.h.

Referenced by upsample().

m_upsampling

int AMBEWorker::m_upsampling

private

Definition at line 150 of file ambeworker.h.

Referenced by handleInputMessages(), and setVolumeFactors().

m_upsamplingFactors

float AMBEWorker::m_upsamplingFactors[7]

private

Definition at line 152 of file ambeworker.h.

Referenced by noUpsample(), setVolumeFactors(), and upsample().

m_volume

float AMBEWorker::m_volume

private

Definition at line 151 of file ambeworker.h.

Referenced by handleInputMessages(), and setVolumeFactors().

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

• sdrbase/ambe/ambeworker.h
• sdrbase/ambe/ambeworker.cpp