1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
#include "audioprovider.hpp"
#include "service.hpp"
#include <QAudioSource>
#include <QDebug>
#include <QIODevice>
#include <QMediaDevices>
#include <QObject>
#include <QThread>
#include <cstddef>
#include <cstdint>
namespace caelestia {
AudioWorker::AudioWorker(int sampleRate, int hopSize, QObject* parent)
: QObject(parent)
, m_sampleRate(sampleRate)
, m_hopSize(hopSize)
, m_source(nullptr)
, m_device(nullptr) {}
void AudioWorker::init() {
QAudioFormat format;
format.setSampleRate(m_sampleRate);
format.setChannelCount(1);
format.setSampleFormat(QAudioFormat::Int16);
m_source = new QAudioSource(QMediaDevices::defaultAudioInput(), format, this);
connect(m_source, &QAudioSource::stateChanged, this, &AudioWorker::handleStateChanged);
};
AudioWorker::~AudioWorker() {
m_source->stop();
delete m_source;
}
void AudioWorker::start() {
if (!m_source) {
return;
}
m_device = m_source->start();
connect(m_device, &QIODevice::readyRead, this, &AudioWorker::processData);
}
void AudioWorker::stop() {
m_source->stop();
m_device = nullptr;
}
template <typename T> void AudioWorker::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 AudioWorker::process(float* outBuf);
template void AudioWorker::process(double* outBuf);
void AudioWorker::handleStateChanged(QtAudio::State state) const {
if (state == QtAudio::StoppedState && m_source->error() != QtAudio::NoError) {
switch (m_source->error()) {
case QtAudio::OpenError:
qWarning() << "AudioWorker: failed to open audio device";
break;
case QtAudio::IOError:
qWarning() << "AudioWorker: an error occurred during read/write of audio device";
break;
case QtAudio::UnderrunError:
qWarning() << "AudioWorker: audio data is not being fed to audio device fast enough";
break;
case QtAudio::FatalError:
qCritical() << "AudioWorker: fatal error in audio device";
break;
default:
break;
}
}
}
AudioProvider::AudioProvider(QObject* parent)
: Service(parent)
, m_worker(nullptr)
, m_thread(nullptr) {}
AudioProvider::~AudioProvider() {
if (m_thread) {
m_thread->quit();
m_thread->wait();
}
}
void AudioProvider::init() {
if (!m_worker) {
qWarning() << "AudioProvider::init: attempted to init with no worker set";
return;
}
m_thread = new QThread(this);
m_worker->moveToThread(m_thread);
connect(m_thread, &QThread::started, m_worker, &AudioWorker::init);
connect(m_thread, &QThread::finished, m_worker, &AudioWorker::deleteLater);
connect(m_thread, &QThread::finished, m_thread, &QThread::deleteLater);
m_thread->start();
}
void AudioProvider::start() {
if (m_worker) {
QMetaObject::invokeMethod(m_worker, "start", Qt::QueuedConnection);
}
}
void AudioProvider::stop() {
if (m_worker) {
QMetaObject::invokeMethod(m_worker, "stop", Qt::QueuedConnection);
}
}
} // namespace caelestia
|
