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++ // Copyright (C) 2023 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include "widget.h"
++ #include "xyseriesiodevice.h"
++
++ #include <QAudioDevice>
++ #include <QAudioInput>
++ #include <QAudioSource>
++ #include <QChart>
++ #include <QChartView>
++ #include <QLineSeries>
++ #include <QValueAxis>
++ #include <QVBoxLayout>
++
++ Widget::Widget(const QAudioDevice &deviceInfo, QWidget *parent)
++ : QWidget(parent)
++ , m_chart(new QChart)
++ , m_series(new QLineSeries)
++ {
++ auto chartView = new QChartView(m_chart);
++ m_chart->addSeries(m_series);
++ auto axisX = new QValueAxis;
++ axisX->setRange(0, XYSeriesIODevice::sampleCount);
++ axisX->setLabelFormat("%g");
++ axisX->setTitleText("Samples");
++ auto axisY = new QValueAxis;
++ axisY->setRange(-1, 1);
++ axisY->setTitleText("Audio level");
++ m_chart->addAxis(axisX, Qt::AlignBottom);
++ m_series->attachAxis(axisX);
++ m_chart->addAxis(axisY, Qt::AlignLeft);
++ m_series->attachAxis(axisY);
++ m_chart->legend()->hide();
++ m_chart->setTitle("Data from the microphone (" + deviceInfo.description() + ')');
++
++ auto mainLayout = new QVBoxLayout(this);
++ mainLayout->addWidget(chartView);
++
++ m_audioInput = new QAudioInput(deviceInfo, this);
++
++ QAudioFormat formatAudio;
++ formatAudio.setSampleRate(8000);
++ formatAudio.setChannelCount(1);
++ formatAudio.setSampleFormat(QAudioFormat::UInt8);
++
++ m_audioSource = new QAudioSource(deviceInfo, formatAudio);
++ m_audioSource->setBufferSize(200);
++
++ m_device = new XYSeriesIODevice(m_series, this);
++ m_device->open(QIODevice::WriteOnly);
++
++ m_audioSource->start(m_device);
++ }
++
++ Widget::~Widget()
++ {
++ m_audioSource->stop();
++ m_device->close();
++ delete m_audioInput;
++ delete m_device;
++ }