mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow),
    m_audio(this),
    m_playing(false)
{
    ui->setupUi(this);

    connect(&m_timer, SIGNAL(timeout()), this, SLOT(timer()));

    m_timer.start();
}

MainWindow::~MainWindow()
{
    delete ui;
}

#include <QAudioDeviceInfo>
#include <QDebug>

// =====================================================================================================================
AudioManager::AudioManager(QObject *parent) :
    QObject(parent)
  , m_audioOutputDevice(NULL)
  , m_audioOutput(NULL)
{
    // PCM{U/A}
    m_pcmFormat.setByteOrder(QAudioFormat::LittleEndian);
    m_pcmFormat.setChannelCount(1);
    m_pcmFormat.setCodec("audio/pcm");
    m_pcmFormat.setFrequency(8000);
    m_pcmFormat.setSampleSize(16);
    m_pcmFormat.setSampleType(QAudioFormat::SignedInt);
}

// =====================================================================================================================
void AudioManager::start()
{
    m_audioOutput = new QAudioOutput(m_pcmFormat, this);
    m_audioOutputDevice = m_audioOutput->start();
    qDebug() << "Started output";
}
void AudioManager::stop()
{
    qDebug() << "Stopping output";
    m_audioOutput->stop();

    qDebug() << "Stopped output";
    m_audioOutputDevice = NULL;

    qDebug() << "Delete output";
    delete m_audioOutput;
    m_audioOutput = NULL;
    qDebug() << "Output reset";
}

// =====================================================================================================================
void AudioManager::playAudio(QByteArray data)
{
    if (!m_audioOutputDevice || !m_audioOutput)
    {
        qDebug() << "Cannot play, device: " << m_audioOutputDevice << " output: " << m_audioOutput;
        return;
    }

    m_audioOutputDevice->write(data);
}