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#include "audioprovider.hpp"
#include "service.hpp"
#include <QAudioSource>
#include <QDebug>
#include <QIODevice>
#include <QMediaDevices>
#include <QObject>
#include <cstddef>
#include <cstdint>
namespace caelestia {
AudioProvider::AudioProvider(int sampleRate, int hopSize, QObject* parent)
: Service(parent)
, m_hopSize(hopSize) {
QAudioFormat format;
format.setSampleRate(sampleRate);
format.setChannelCount(1);
format.setSampleFormat(QAudioFormat::Int16);
m_source = new QAudioSource(QMediaDevices::defaultAudioInput(), format, this);
connect(m_source, &QAudioSource::stateChanged, this, &AudioProvider::handleStateChanged);
};
AudioProvider::~AudioProvider() {
m_source->stop();
delete m_source;
}
void AudioProvider::start() {
m_device = m_source->start();
connect(m_device, &QIODevice::readyRead, this, &AudioProvider::processData);
}
void AudioProvider::stop() {
m_source->stop();
m_device = nullptr;
}
template <typename T> void AudioProvider::process(T* outBuf) {
const QByteArray data = m_device->readAll();
const int16_t* samples = reinterpret_cast<const int16_t*>(data.constData());
const size_t count = static_cast<size_t>(data.size()) / sizeof(int16_t);
const size_t hopSize = static_cast<size_t>(m_hopSize);
for (size_t i = 0; i < count; ++i) {
outBuf[i % hopSize] = static_cast<T>(samples[i] / 32768.0);
if ((i + 1) % hopSize == 0) {
consumeData();
}
}
}
template void AudioProvider::process(float* outBuf);
template void AudioProvider::process(double* outBuf);
void AudioProvider::handleStateChanged(QtAudio::State state) const {
if (state == QtAudio::StoppedState && m_source->error() != QtAudio::NoError) {
switch (m_source->error()) {
case QtAudio::OpenError:
qWarning() << "AudioProvider: failed to open audio device";
break;
case QtAudio::IOError:
qWarning() << "AudioProvider: an error occurred during read/write of audio device";
break;
case QtAudio::UnderrunError:
qWarning() << "AudioProvider: audio data is not being fed to audio device fast enough";
break;
case QtAudio::FatalError:
qCritical() << "AudioProvider: fatal error in audio device";
break;
default:
break;
}
}
}
} // namespace caelestia
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