/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
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** This file is part of the Qt Charts module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
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#include "widget.h"
#include "xyseriesiodevice.h"

#include <QtMultimedia/QAudioDevice>
#include <QtMultimedia/QAudioInput>
#include <QtMultimedia/QAudioSource>

#include <QtCharts/QChartView>
#include <QtCharts/QLineSeries>
#include <QtCharts/QChart>
#include <QtCharts/QValueAxis>

#include <QtWidgets/QVBoxLayout>

QT_USE_NAMESPACE

Widget::Widget(const QAudioDevice &deviceInfo, QWidget *parent) :
    QWidget(parent),
    m_chart(new QChart),
    m_series(new QLineSeries)
{
    QChartView *chartView = new QChartView(m_chart);
    chartView->setMinimumSize(800, 600);
    m_chart->addSeries(m_series);
    QValueAxis *axisX = new QValueAxis;
    axisX->setRange(0, XYSeriesIODevice::sampleCount);
    axisX->setLabelFormat("%g");
    axisX->setTitleText("Samples");
    QValueAxis *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() + ')');

    QVBoxLayout *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;
}
