mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-05 08:21:16 -05:00
318 lines
8.7 KiB
C++
318 lines
8.7 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2018 Edouard Griffiths, F4EXB //
|
|
// //
|
|
// This program is free software; you can redistribute it and/or modify //
|
|
// it under the terms of the GNU General Public License as published by //
|
|
// the Free Software Foundation as version 3 of the License, or //
|
|
// //
|
|
// This program is distributed in the hope that it will be useful, //
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
|
|
// GNU General Public License V3 for more details. //
|
|
// //
|
|
// You should have received a copy of the GNU General Public License //
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
|
|
///////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include "testsourcethread.h"
|
|
|
|
#include "dsp/samplesinkfifo.h"
|
|
|
|
#define TESTSOURCE_BLOCKSIZE 16384
|
|
|
|
TestSourceThread::TestSourceThread(SampleSinkFifo* sampleFifo, QObject* parent) :
|
|
QThread(parent),
|
|
m_running(false),
|
|
m_buf(0),
|
|
m_bufsize(0),
|
|
m_chunksize(0),
|
|
m_convertBuffer(TESTSOURCE_BLOCKSIZE),
|
|
m_sampleFifo(sampleFifo),
|
|
m_frequencyShift(0),
|
|
m_toneFrequency(440),
|
|
m_modulation(TestSourceSettings::ModulationNone),
|
|
m_amModulation(0.5f),
|
|
m_fmDeviationUnit(0.0f),
|
|
m_fmPhasor(0.0f),
|
|
m_samplerate(48000),
|
|
m_log2Decim(4),
|
|
m_fcPos(0),
|
|
m_bitSizeIndex(0),
|
|
m_bitShift(8),
|
|
m_amplitudeBits(127),
|
|
m_dcBias(0.0f),
|
|
m_iBias(0.0f),
|
|
m_qBias(0.0f),
|
|
m_phaseImbalance(0.0f),
|
|
m_amplitudeBitsDC(0),
|
|
m_amplitudeBitsI(127),
|
|
m_amplitudeBitsQ(127),
|
|
m_frequency(435*1000),
|
|
m_fcPosShift(0),
|
|
m_throttlems(TESTSOURCE_THROTTLE_MS),
|
|
m_throttleToggle(false),
|
|
m_mutex(QMutex::Recursive)
|
|
{
|
|
}
|
|
|
|
TestSourceThread::~TestSourceThread()
|
|
{
|
|
stopWork();
|
|
}
|
|
|
|
void TestSourceThread::startWork()
|
|
{
|
|
m_startWaitMutex.lock();
|
|
m_elapsedTimer.start();
|
|
start();
|
|
while(!m_running)
|
|
m_startWaiter.wait(&m_startWaitMutex, 100);
|
|
m_startWaitMutex.unlock();
|
|
}
|
|
|
|
void TestSourceThread::stopWork()
|
|
{
|
|
m_running = false;
|
|
wait();
|
|
}
|
|
|
|
void TestSourceThread::setSamplerate(int samplerate)
|
|
{
|
|
QMutexLocker mutexLocker(&m_mutex);
|
|
|
|
m_samplerate = samplerate;
|
|
m_chunksize = 4 * ((m_samplerate * (m_throttlems+(m_throttleToggle ? 1 : 0))) / 1000);
|
|
m_throttleToggle = !m_throttleToggle;
|
|
m_nco.setFreq(m_frequencyShift, m_samplerate);
|
|
m_toneNco.setFreq(m_toneFrequency, m_samplerate);
|
|
}
|
|
|
|
void TestSourceThread::setLog2Decimation(unsigned int log2_decim)
|
|
{
|
|
m_log2Decim = log2_decim;
|
|
}
|
|
|
|
void TestSourceThread::setFcPos(int fcPos)
|
|
{
|
|
m_fcPos = fcPos;
|
|
}
|
|
|
|
void TestSourceThread::setBitSize(quint32 bitSizeIndex)
|
|
{
|
|
switch (bitSizeIndex)
|
|
{
|
|
case 0:
|
|
m_bitShift = 7;
|
|
m_bitSizeIndex = 0;
|
|
break;
|
|
case 1:
|
|
m_bitShift = 11;
|
|
m_bitSizeIndex = 1;
|
|
break;
|
|
case 2:
|
|
default:
|
|
m_bitShift = 15;
|
|
m_bitSizeIndex = 2;
|
|
break;
|
|
}
|
|
}
|
|
|
|
void TestSourceThread::setAmplitudeBits(int32_t amplitudeBits)
|
|
{
|
|
m_amplitudeBits = amplitudeBits;
|
|
m_amplitudeBitsDC = m_dcBias * amplitudeBits;
|
|
m_amplitudeBitsI = (1.0f + m_iBias) * amplitudeBits;
|
|
m_amplitudeBitsQ = (1.0f + m_qBias) * amplitudeBits;
|
|
}
|
|
|
|
void TestSourceThread::setDCFactor(float dcFactor)
|
|
{
|
|
m_dcBias = dcFactor;
|
|
m_amplitudeBitsDC = m_dcBias * m_amplitudeBits;
|
|
}
|
|
|
|
void TestSourceThread::setIFactor(float iFactor)
|
|
{
|
|
m_iBias = iFactor;
|
|
m_amplitudeBitsI = (1.0f + m_iBias) * m_amplitudeBits;
|
|
}
|
|
|
|
void TestSourceThread::setQFactor(float iFactor)
|
|
{
|
|
m_qBias = iFactor;
|
|
m_amplitudeBitsQ = (1.0f + m_qBias) * m_amplitudeBits;
|
|
}
|
|
|
|
void TestSourceThread::setPhaseImbalance(float phaseImbalance)
|
|
{
|
|
m_phaseImbalance = phaseImbalance;
|
|
}
|
|
|
|
void TestSourceThread::setFrequencyShift(int shift)
|
|
{
|
|
m_nco.setFreq(shift, m_samplerate);
|
|
}
|
|
|
|
void TestSourceThread::setToneFrequency(int toneFrequency)
|
|
{
|
|
m_toneNco.setFreq(toneFrequency, m_samplerate);
|
|
}
|
|
|
|
void TestSourceThread::setModulation(TestSourceSettings::Modulation modulation)
|
|
{
|
|
m_modulation = modulation;
|
|
}
|
|
|
|
void TestSourceThread::setAMModulation(float amModulation)
|
|
{
|
|
m_amModulation = amModulation < 0.0f ? 0.0f : amModulation > 1.0f ? 1.0f : amModulation;
|
|
}
|
|
|
|
void TestSourceThread::setFMDeviation(float deviation)
|
|
{
|
|
float fmDeviationUnit = deviation / (float) m_samplerate;
|
|
m_fmDeviationUnit = fmDeviationUnit < 0.0f ? 0.0f : fmDeviationUnit > 0.5f ? 0.5f : fmDeviationUnit;
|
|
qDebug("TestSourceThread::setFMDeviation: m_fmDeviationUnit: %f", m_fmDeviationUnit);
|
|
}
|
|
|
|
void TestSourceThread::run()
|
|
{
|
|
m_running = true;
|
|
m_startWaiter.wakeAll();
|
|
|
|
while (m_running) // actual work is in the tick() function
|
|
{
|
|
sleep(1);
|
|
}
|
|
|
|
m_running = false;
|
|
}
|
|
|
|
void TestSourceThread::setBuffers(quint32 chunksize)
|
|
{
|
|
if (chunksize > m_bufsize)
|
|
{
|
|
m_bufsize = chunksize;
|
|
|
|
if (m_buf == 0)
|
|
{
|
|
qDebug() << "TestSourceThread::setBuffer: Allocate buffer: "
|
|
<< " size: " << m_bufsize << " bytes"
|
|
<< " #samples: " << (m_bufsize/4);
|
|
m_buf = (qint16*) malloc(m_bufsize);
|
|
}
|
|
else
|
|
{
|
|
qDebug() << "TestSourceThread::setBuffer: Re-allocate buffer: "
|
|
<< " size: " << m_bufsize << " bytes"
|
|
<< " #samples: " << (m_bufsize/4);
|
|
free(m_buf);
|
|
m_buf = (qint16*) malloc(m_bufsize);
|
|
}
|
|
|
|
m_convertBuffer.resize(chunksize/4);
|
|
}
|
|
}
|
|
|
|
void TestSourceThread::generate(quint32 chunksize)
|
|
{
|
|
int n = chunksize / 2;
|
|
setBuffers(chunksize);
|
|
|
|
for (int i = 0; i < n-1;)
|
|
{
|
|
switch (m_modulation)
|
|
{
|
|
case TestSourceSettings::ModulationAM:
|
|
{
|
|
Complex c = m_nco.nextIQ();
|
|
Real t, re, im;
|
|
pullAF(t);
|
|
t = (t*m_amModulation + 1.0f)*0.5f;
|
|
re = c.real()*t;
|
|
im = c.imag()*t + m_phaseImbalance*re;
|
|
m_buf[i++] = (int16_t) (re * (float) m_amplitudeBitsI) + m_amplitudeBitsDC;
|
|
m_buf[i++] = (int16_t) (im * (float) m_amplitudeBitsQ);
|
|
}
|
|
break;
|
|
case TestSourceSettings::ModulationFM:
|
|
{
|
|
Complex c = m_nco.nextIQ();
|
|
Real t, re, im;
|
|
pullAF(t);
|
|
m_fmPhasor += m_fmDeviationUnit * t;
|
|
m_fmPhasor = m_fmPhasor < -1.0f ? -m_fmPhasor - 1.0f : m_fmPhasor > 1.0f ? m_fmPhasor - 1.0f : m_fmPhasor;
|
|
re = c.real()*cos(m_fmPhasor*M_PI) - c.imag()*sin(m_fmPhasor*M_PI);
|
|
im = (c.real()*sin(m_fmPhasor*M_PI) + c.imag()*cos(m_fmPhasor*M_PI)) + m_phaseImbalance*re;
|
|
m_buf[i++] = (int16_t) (re * (float) m_amplitudeBitsI) + m_amplitudeBitsDC;
|
|
m_buf[i++] = (int16_t) (im * (float) m_amplitudeBitsQ);
|
|
}
|
|
break;
|
|
case TestSourceSettings::ModulationNone:
|
|
default:
|
|
{
|
|
Complex c = m_nco.nextIQ(m_phaseImbalance);
|
|
m_buf[i++] = (int16_t) (c.real() * (float) m_amplitudeBitsI) + m_amplitudeBitsDC;
|
|
m_buf[i++] = (int16_t) (c.imag() * (float) m_amplitudeBitsQ);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
callback(m_buf, n);
|
|
}
|
|
|
|
void TestSourceThread::pullAF(Real& afSample)
|
|
{
|
|
afSample = m_toneNco.next();
|
|
}
|
|
|
|
// call appropriate conversion (decimation) routine depending on the number of sample bits
|
|
void TestSourceThread::callback(const qint16* buf, qint32 len)
|
|
{
|
|
SampleVector::iterator it = m_convertBuffer.begin();
|
|
|
|
switch (m_bitSizeIndex)
|
|
{
|
|
case 0: // 8 bit samples
|
|
convert_8(&it, buf, len);
|
|
break;
|
|
case 1: // 12 bit samples
|
|
convert_12(&it, buf, len);
|
|
break;
|
|
case 2: // 16 bit samples
|
|
default:
|
|
convert_16(&it, buf, len);
|
|
break;
|
|
}
|
|
|
|
m_sampleFifo->write(m_convertBuffer.begin(), it);
|
|
}
|
|
|
|
void TestSourceThread::connectTimer(const QTimer& timer)
|
|
{
|
|
qDebug() << "TestSourceThread::connectTimer";
|
|
connect(&timer, SIGNAL(timeout()), this, SLOT(tick()));
|
|
}
|
|
|
|
void TestSourceThread::tick()
|
|
{
|
|
if (m_running)
|
|
{
|
|
qint64 throttlems = m_elapsedTimer.restart();
|
|
|
|
if (throttlems != m_throttlems)
|
|
{
|
|
QMutexLocker mutexLocker(&m_mutex);
|
|
m_throttlems = throttlems;
|
|
m_chunksize = 4 * ((m_samplerate * (m_throttlems+(m_throttleToggle ? 1 : 0))) / 1000);
|
|
m_throttleToggle = !m_throttleToggle;
|
|
}
|
|
|
|
generate(m_chunksize);
|
|
}
|
|
}
|
|
|