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sdrangel/plugins/samplesink/audiooutput/audiooutputworker.cpp

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2020-11-21 05:15:06 -05:00
///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2020 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 <QTimer>
#include <QDebug>
#include "dsp/samplesourcefifo.h"
#include "audio/audiofifo.h"
#include "audiooutputworker.h"
#define AUDIOOUTPUT_THROTTLE_MS 50
AudioOutputWorker::AudioOutputWorker(SampleSourceFifo* sampleFifo, AudioFifo *fifo, QObject* parent) :
QObject(parent),
m_running(false),
m_samplerate(0),
m_throttlems(AUDIOOUTPUT_THROTTLE_MS),
m_maxThrottlems(50),
m_throttleToggle(false),
m_iqMapping(AudioOutputSettings::IQMapping::LR),
m_buf(nullptr),
m_samplesChunkSize(0),
m_sampleFifo(sampleFifo),
m_audioFifo(fifo)
{
m_audioBuffer.resize(1<<14);
m_audioBufferFill = 0;
}
AudioOutputWorker::~AudioOutputWorker()
{
}
void AudioOutputWorker::startWork()
{
qDebug("AudioOutputWorker::startWork");
m_running = true;
}
void AudioOutputWorker::stopWork()
{
qDebug("AudioOutputWorker::stopWork");
m_running = false;
}
void AudioOutputWorker::connectTimer(const QTimer& timer)
{
qDebug() << "AudioOutputWorker::connectTimer";
connect(&timer, SIGNAL(timeout()), this, SLOT(tick()));
}
void AudioOutputWorker::setSamplerate(int samplerate)
{
if (samplerate != m_samplerate)
{
bool wasRunning = false;
if (m_running)
{
stopWork();
wasRunning = true;
}
// resize sample FIFO
if (m_sampleFifo) {
m_sampleFifo->resize(SampleSourceFifo::getSizePolicy(samplerate)); // 1s buffer
}
qDebug() << "AudioOutputWorker::setSamplerate:"
<< " new:" << samplerate
<< " old:" << m_samplerate
<< " m_sampleFifo size:" << m_sampleFifo->size()
<< " m_audioFifo size:" << m_audioFifo->size()
<< " sample i/q size" << sizeof(FixReal);
// resize output buffer
if (m_buf) {
delete[] m_buf;
}
m_buf = new int16_t[samplerate*2];
m_samplerate = samplerate;
m_samplesChunkSize = (m_samplerate * m_throttlems) / 1000;
if (wasRunning) {
startWork();
}
}
}
void AudioOutputWorker::tick()
{
if (m_running)
{
qint64 throttlems = m_elapsedTimer.restart();
if (throttlems != m_throttlems)
{
m_throttlems = throttlems;
m_samplesChunkSize = (m_samplerate * (m_throttlems+(m_throttleToggle ? 1 : 0))) / 1000;
m_throttleToggle = !m_throttleToggle;
}
unsigned int iPart1Begin, iPart1End, iPart2Begin, iPart2End;
SampleVector& data = m_sampleFifo->getData();
m_sampleFifo->read(m_samplesChunkSize, iPart1Begin, iPart1End, iPart2Begin, iPart2End);
if (iPart1Begin != iPart1End) {
callbackPart(data, iPart1Begin, iPart1End);
}
if (iPart2Begin != iPart2End) {
callbackPart(data, iPart2Begin, iPart2End);
}
// qDebug("AudioOutputWorker::tick: %d samples fill: %u", m_samplesChunkSize, m_audioFifo->fill());
}
}
void AudioOutputWorker::callbackPart(SampleVector& data, unsigned int iBegin, unsigned int iEnd)
{
for (unsigned int i = iBegin; i < iEnd; i++)
{
m_audioBuffer[m_audioBufferFill].l = m_iqMapping == AudioOutputSettings::LR ? data[i].m_real : data[i].m_imag;
m_audioBuffer[m_audioBufferFill].r = m_iqMapping == AudioOutputSettings::LR ? data[i].m_imag : data[i].m_real;
m_audioBufferFill++;
if (m_audioBufferFill >= m_audioBuffer.size())
{
uint res = m_audioFifo->write((const quint8*)&m_audioBuffer[0], m_audioBufferFill);
if (res != m_audioBufferFill)
{
qDebug("AudioOutputWorker::callbackPart: %u/%u audio samples written", res, m_audioBufferFill);
m_audioFifo->clear();
}
m_audioBufferFill = 0;
}
}
}