mirror of
https://github.com/f4exb/sdrangel.git
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158 lines
5.0 KiB
C++
158 lines
5.0 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2020 Edouard Griffiths, F4EXB //
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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 <QTimer>
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#include <QDebug>
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#include "dsp/samplesourcefifo.h"
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#include "audio/audiofifo.h"
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#include "audiooutputworker.h"
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#define AUDIOOUTPUT_THROTTLE_MS 50
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AudioOutputWorker::AudioOutputWorker(SampleSourceFifo* sampleFifo, AudioFifo *fifo, QObject* parent) :
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QObject(parent),
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m_running(false),
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m_samplerate(0),
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m_throttlems(AUDIOOUTPUT_THROTTLE_MS),
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m_maxThrottlems(50),
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m_throttleToggle(false),
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m_iqMapping(AudioOutputSettings::IQMapping::LR),
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m_buf(nullptr),
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m_samplesChunkSize(0),
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m_sampleFifo(sampleFifo),
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m_audioFifo(fifo)
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{
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m_audioBuffer.resize(1<<14);
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m_audioBufferFill = 0;
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}
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AudioOutputWorker::~AudioOutputWorker()
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{
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}
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void AudioOutputWorker::startWork()
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{
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qDebug("AudioOutputWorker::startWork");
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m_running = true;
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}
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void AudioOutputWorker::stopWork()
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{
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qDebug("AudioOutputWorker::stopWork");
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m_running = false;
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}
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void AudioOutputWorker::connectTimer(const QTimer& timer)
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{
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qDebug() << "AudioOutputWorker::connectTimer";
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connect(&timer, SIGNAL(timeout()), this, SLOT(tick()));
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}
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void AudioOutputWorker::setSamplerate(int samplerate)
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{
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if (samplerate != m_samplerate)
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{
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bool wasRunning = false;
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if (m_running)
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{
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stopWork();
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wasRunning = true;
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}
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// resize sample FIFO
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if (m_sampleFifo) {
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m_sampleFifo->resize(SampleSourceFifo::getSizePolicy(samplerate)); // 1s buffer
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}
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qDebug() << "AudioOutputWorker::setSamplerate:"
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<< " new:" << samplerate
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<< " old:" << m_samplerate
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<< " m_sampleFifo size:" << m_sampleFifo->size()
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<< " m_audioFifo size:" << m_audioFifo->size()
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<< " sample i/q size" << sizeof(FixReal);
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// resize output buffer
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if (m_buf) {
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delete[] m_buf;
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}
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m_buf = new int16_t[samplerate*2];
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m_samplerate = samplerate;
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m_samplesChunkSize = (m_samplerate * m_throttlems) / 1000;
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if (wasRunning) {
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startWork();
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}
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}
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}
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void AudioOutputWorker::tick()
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{
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if (m_running)
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{
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qint64 throttlems = m_elapsedTimer.restart();
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if (throttlems != m_throttlems)
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{
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m_throttlems = throttlems;
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m_samplesChunkSize = (m_samplerate * (m_throttlems+(m_throttleToggle ? 1 : 0))) / 1000;
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m_throttleToggle = !m_throttleToggle;
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}
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unsigned int iPart1Begin, iPart1End, iPart2Begin, iPart2End;
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SampleVector& data = m_sampleFifo->getData();
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m_sampleFifo->read(m_samplesChunkSize, iPart1Begin, iPart1End, iPart2Begin, iPart2End);
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if (iPart1Begin != iPart1End) {
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callbackPart(data, iPart1Begin, iPart1End);
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}
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if (iPart2Begin != iPart2End) {
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callbackPart(data, iPart2Begin, iPart2End);
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}
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// qDebug("AudioOutputWorker::tick: %d samples fill: %u", m_samplesChunkSize, m_audioFifo->fill());
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}
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}
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void AudioOutputWorker::callbackPart(SampleVector& data, unsigned int iBegin, unsigned int iEnd)
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{
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for (unsigned int i = iBegin; i < iEnd; i++)
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{
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m_audioBuffer[m_audioBufferFill].l = m_iqMapping == AudioOutputSettings::LR ? data[i].m_real : data[i].m_imag;
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m_audioBuffer[m_audioBufferFill].r = m_iqMapping == AudioOutputSettings::LR ? data[i].m_imag : data[i].m_real;
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m_audioBufferFill++;
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if (m_audioBufferFill >= m_audioBuffer.size())
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{
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uint res = m_audioFifo->write((const quint8*)&m_audioBuffer[0], m_audioBufferFill);
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if (res != m_audioBufferFill)
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{
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qDebug("AudioOutputWorker::callbackPart: %u/%u audio samples written", res, m_audioBufferFill);
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m_audioFifo->clear();
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}
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m_audioBufferFill = 0;
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}
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}
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}
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