sdrangel/plugins/samplesink/bladerf1output/bladerf1outputthread.cpp

136 wiersze
4.1 KiB
C++

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2015 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 //
// (at your option) any later version. //
// //
// 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 "bladerf1outputthread.h"
#include <stdio.h>
#include <errno.h>
#include <algorithm>
#include "dsp/samplesourcefifo.h"
Bladerf1OutputThread::Bladerf1OutputThread(struct bladerf* dev, SampleSourceFifo* sampleFifo, QObject* parent) :
QThread(parent),
m_running(false),
m_dev(dev),
m_sampleFifo(sampleFifo),
m_log2Interp(0)
{
std::fill(m_buf, m_buf + 2*BLADERFOUTPUT_BLOCKSIZE, 0);
}
Bladerf1OutputThread::~Bladerf1OutputThread()
{
stopWork();
}
void Bladerf1OutputThread::startWork()
{
m_startWaitMutex.lock();
start();
while(!m_running)
m_startWaiter.wait(&m_startWaitMutex, 100);
m_startWaitMutex.unlock();
}
void Bladerf1OutputThread::stopWork()
{
m_running = false;
wait();
}
void Bladerf1OutputThread::setLog2Interpolation(unsigned int log2_interp)
{
m_log2Interp = log2_interp;
}
void Bladerf1OutputThread::run()
{
int res;
m_running = true;
m_startWaiter.wakeAll();
while (m_running)
{
callback(m_buf, BLADERFOUTPUT_BLOCKSIZE);
if((res = bladerf_sync_tx(m_dev, m_buf, BLADERFOUTPUT_BLOCKSIZE, NULL, 10000)) < 0)
{
qCritical("BladerdOutputThread:run: sync error: %s", strerror(errno));
break;
}
}
m_running = false;
}
// Interpolate according to specified log2 (ex: log2=4 => decim=16)
void Bladerf1OutputThread::callback(qint16* buf, qint32 len)
{
SampleVector& data = m_sampleFifo->getData();
unsigned int iPart1Begin, iPart1End, iPart2Begin, iPart2End;
m_sampleFifo->read(len/(1<<m_log2Interp), iPart1Begin, iPart1End, iPart2Begin, iPart2End);
if (iPart1Begin != iPart1End) {
callbackPart(buf, data, iPart1Begin, iPart1End);
}
unsigned int shift = (iPart1End - iPart1Begin)*(1<<m_log2Interp);
if (iPart2Begin != iPart2End) {
callbackPart(buf + 2*shift, data, iPart2Begin, iPart2End);
}
}
void Bladerf1OutputThread::callbackPart(qint16* buf, SampleVector& data, unsigned int iBegin, unsigned int iEnd)
{
SampleVector::iterator beginRead = data.begin() + iBegin;
int len = 2*(iEnd - iBegin)*(1<<m_log2Interp);
if (m_log2Interp == 0)
{
m_interpolators.interpolate1(&beginRead, buf, len);
}
else
{
switch (m_log2Interp)
{
case 1:
m_interpolators.interpolate2_cen(&beginRead, buf, len, true);
break;
case 2:
m_interpolators.interpolate4_cen(&beginRead, buf, len, true);
break;
case 3:
m_interpolators.interpolate8_cen(&beginRead, buf, len, true);
break;
case 4:
m_interpolators.interpolate16_cen(&beginRead, buf, len, true);
break;
case 5:
m_interpolators.interpolate32_cen(&beginRead, buf, len, true);
break;
case 6:
m_interpolators.interpolate64_cen(&beginRead, buf, len, true);
break;
default:
break;
}
}
}