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142 lines
4.2 KiB
C++
142 lines
4.2 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
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// written by Christian Daniel //
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// Copyright (C) 2020 Jon Beniston, M7RCE //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// (at your option) any later version. //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#include <QDebug>
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#include <stdio.h>
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#include <errno.h>
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#include <chrono>
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#include <thread>
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#include "dsp/samplesinkfifo.h"
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#include "audio/audiofifo.h"
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#include "audioinputthread.h"
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AudioInputThread::AudioInputThread(SampleSinkFifo* sampleFifo, AudioFifo *fifo, QObject* parent) :
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QThread(parent),
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m_fifo(fifo),
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m_running(false),
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m_log2Decim(0),
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m_iqMapping(AudioInputSettings::IQMapping::L),
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m_convertBuffer(m_convBufSamples),
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m_sampleFifo(sampleFifo)
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{
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start();
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}
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AudioInputThread::~AudioInputThread()
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{
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}
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void AudioInputThread::startWork()
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{
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m_startWaitMutex.lock();
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start();
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while(!m_running)
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{
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m_startWaiter.wait(&m_startWaitMutex, 100);
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}
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m_startWaitMutex.unlock();
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}
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void AudioInputThread::stopWork()
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{
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m_running = false;
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wait();
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}
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void AudioInputThread::run()
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{
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m_running = true;
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qDebug("AudioInputThread::run: start running loop");
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while (m_running)
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{
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workIQ(m_convBufSamples);
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}
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qDebug("AudioInputThread::run: running loop stopped");
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m_running = false;
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}
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void AudioInputThread::workIQ(unsigned int samples)
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{
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// Most of the time, this returns 0, because of the low sample rate.
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// Could be more efficient in this case to have blocking wait?
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uint32_t nbRead = m_fifo->read((unsigned char *) m_buf, samples);
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// Map between left and right audio channels and IQ channels
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if (m_iqMapping == AudioInputSettings::IQMapping::L)
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{
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for (uint32_t i = 0; i < nbRead; i++)
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m_buf[i*2+1] = 0;
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}
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else if (m_iqMapping == AudioInputSettings::IQMapping::R)
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{
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for (uint32_t i = 0; i < nbRead; i++)
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{
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m_buf[i*2] = m_buf[i*2+1];
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m_buf[i*2+1] = 0;
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}
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}
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else if (m_iqMapping == AudioInputSettings::IQMapping::LR)
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{
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for (uint32_t i = 0; i < nbRead; i++)
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{
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qint16 t = m_buf[i*2];
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m_buf[i*2] = m_buf[i*2+1];
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m_buf[i*2+1] = t;
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}
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}
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SampleVector::iterator it = m_convertBuffer.begin();
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switch (m_log2Decim)
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{
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case 0:
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m_decimatorsIQ.decimate1(&it, m_buf, 2*nbRead);
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break;
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case 1:
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m_decimatorsIQ.decimate2_cen(&it, m_buf, 2*nbRead);
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break;
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case 2:
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m_decimatorsIQ.decimate4_cen(&it, m_buf, 2*nbRead);
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break;
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case 3:
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m_decimatorsIQ.decimate8_cen(&it, m_buf, 2*nbRead);
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break;
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case 4:
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m_decimatorsIQ.decimate16_cen(&it, m_buf, 2*nbRead);
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break;
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case 5:
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m_decimatorsIQ.decimate32_cen(&it, m_buf, 2*nbRead);
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break;
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case 6:
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m_decimatorsIQ.decimate64_cen(&it, m_buf, 2*nbRead);
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break;
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default:
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break;
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}
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m_sampleFifo->write(m_convertBuffer.begin(), it);
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}
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