source: trunk/examples/multimedia/audiodevices/audiodevices.cpp@ 641

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#include <QAudioDeviceInfo>

#include "audiodevices.h"

AudioDevicesBase::AudioDevicesBase(QWidget *parent, Qt::WFlags f)
    : QMainWindow(parent, f)
{
    setupUi(this);
}

AudioDevicesBase::~AudioDevicesBase() {}


AudioTest::AudioTest(QWidget *parent, Qt::WFlags f)
    : AudioDevicesBase(parent, f)
{
    mode = QAudio::AudioOutput;

    connect(testButton, SIGNAL(clicked()), SLOT(test()));
    connect(modeBox, SIGNAL(activated(int)), SLOT(modeChanged(int)));
    connect(deviceBox, SIGNAL(activated(int)), SLOT(deviceChanged(int)));
    connect(frequencyBox, SIGNAL(activated(int)), SLOT(freqChanged(int)));
    connect(channelsBox, SIGNAL(activated(int)), SLOT(channelChanged(int)));
    connect(codecsBox, SIGNAL(activated(int)), SLOT(codecChanged(int)));
    connect(sampleSizesBox, SIGNAL(activated(int)), SLOT(sampleSizeChanged(int)));
    connect(sampleTypesBox, SIGNAL(activated(int)), SLOT(sampleTypeChanged(int)));
    connect(endianBox, SIGNAL(activated(int)), SLOT(endianChanged(int)));

    modeBox->setCurrentIndex(0);
    modeChanged(0);
    deviceBox->setCurrentIndex(0);
    deviceChanged(0);
}

AudioTest::~AudioTest()
{
}

void AudioTest::test()
{
    // tries to set all the settings picked.
    logOutput->clear();
    logOutput->append("NOTE: an invalid codec audio/test exists for testing, to get a fail condition.");

    if (!deviceInfo.isNull()) {
        if (deviceInfo.isFormatSupported(settings)) {
            logOutput->append(tr("Success"));
            nearestFreq->setText("");
            nearestChannel->setText("");
            nearestCodec->setText("");
            nearestSampleSize->setText("");
            nearestSampleType->setText("");
            nearestEndian->setText("");
        } else {
            QAudioFormat nearest = deviceInfo.nearestFormat(settings);
            logOutput->append(tr("Failed"));
            nearestFreq->setText(QString("%1").arg(nearest.frequency()));
            nearestChannel->setText(QString("%1").arg(nearest.channels()));
            nearestCodec->setText(nearest.codec());
            nearestSampleSize->setText(QString("%1").arg(nearest.sampleSize()));

            switch(nearest.sampleType()) {
                case QAudioFormat::SignedInt:
                    nearestSampleType->setText("SignedInt");
                    break;
                case QAudioFormat::UnSignedInt:
                    nearestSampleType->setText("UnSignedInt");
                    break;
                case QAudioFormat::Float:
                    nearestSampleType->setText("Float");
                    break;
                case QAudioFormat::Unknown:
                    nearestSampleType->setText("Unknown");
            }
            switch(nearest.byteOrder()) {
                case QAudioFormat::LittleEndian:
                    nearestEndian->setText("LittleEndian");
                    break;
                case QAudioFormat::BigEndian:
                    nearestEndian->setText("BigEndian");
            }
        }
    }
    else
        logOutput->append(tr("No Device"));
}

void AudioTest::modeChanged(int idx)
{
    // mode has changed
    if (idx == 0)
        mode = QAudio::AudioInput;
    else
        mode = QAudio::AudioOutput;

    deviceBox->clear();
    foreach (const QAudioDeviceInfo &deviceInfo, QAudioDeviceInfo::availableDevices(mode))
        deviceBox->addItem(deviceInfo.deviceName(), qVariantFromValue(deviceInfo));
}

void AudioTest::deviceChanged(int idx)
{
    if (deviceBox->count() == 0)
        return;

    // device has changed
    deviceInfo = deviceBox->itemData(idx).value<QAudioDeviceInfo>();

    frequencyBox->clear();
    QList<int> freqz = deviceInfo.supportedFrequencies();
    for (int i = 0; i < freqz.size(); ++i)
        frequencyBox->addItem(QString("%1").arg(freqz.at(i)));
    if (freqz.size())
        settings.setFrequency(freqz.at(0));

    channelsBox->clear();
    QList<int> chz = deviceInfo.supportedChannels();
    for (int i = 0; i < chz.size(); ++i)
        channelsBox->addItem(QString("%1").arg(chz.at(i)));
    if (chz.size())
        settings.setChannels(chz.at(0));

    codecsBox->clear();
    QStringList codecz = deviceInfo.supportedCodecs();
    for (int i = 0; i < codecz.size(); ++i)
        codecsBox->addItem(QString("%1").arg(codecz.at(i)));
    if (codecz.size())
        settings.setCodec(codecz.at(0));
    // Add false to create failed condition!
    codecsBox->addItem("audio/test");

    sampleSizesBox->clear();
    QList<int> sampleSizez = deviceInfo.supportedSampleSizes();
    for (int i = 0; i < sampleSizez.size(); ++i)
        sampleSizesBox->addItem(QString("%1").arg(sampleSizez.at(i)));
    if (sampleSizez.size())
        settings.setSampleSize(sampleSizez.at(0));

    sampleTypesBox->clear();
    QList<QAudioFormat::SampleType> sampleTypez = deviceInfo.supportedSampleTypes();
    for (int i = 0; i < sampleTypez.size(); ++i) {
        switch(sampleTypez.at(i)) {
            case QAudioFormat::SignedInt:
                sampleTypesBox->addItem("SignedInt");
                break;
            case QAudioFormat::UnSignedInt:
                sampleTypesBox->addItem("UnSignedInt");
                break;
            case QAudioFormat::Float:
                sampleTypesBox->addItem("Float");
                break;
            case QAudioFormat::Unknown:
                sampleTypesBox->addItem("Unknown");
        }
        if (sampleTypez.size())
            settings.setSampleType(sampleTypez.at(0));
    }

    endianBox->clear();
    QList<QAudioFormat::Endian> endianz = deviceInfo.supportedByteOrders();
    for (int i = 0; i < endianz.size(); ++i) {
        switch (endianz.at(i)) {
            case QAudioFormat::LittleEndian:
                endianBox->addItem("Little Endian");
                break;
            case QAudioFormat::BigEndian:
                endianBox->addItem("Big Endian");
                break;
        }
    }
    if (endianz.size())
        settings.setByteOrder(endianz.at(0));
}

void AudioTest::freqChanged(int idx)
{
    // freq has changed
    settings.setFrequency(frequencyBox->itemText(idx).toInt());
}

void AudioTest::channelChanged(int idx)
{
    settings.setChannels(channelsBox->itemText(idx).toInt());
}

void AudioTest::codecChanged(int idx)
{
    settings.setCodec(codecsBox->itemText(idx));
}

void AudioTest::sampleSizeChanged(int idx)
{
    settings.setSampleSize(sampleSizesBox->itemText(idx).toInt());
}

void AudioTest::sampleTypeChanged(int idx)
{
    switch (sampleTypesBox->itemText(idx).toInt()) {
        case QAudioFormat::SignedInt:
            settings.setSampleType(QAudioFormat::SignedInt);
            break;
        case QAudioFormat::UnSignedInt:
            settings.setSampleType(QAudioFormat::UnSignedInt);
            break;
        case QAudioFormat::Float:
            settings.setSampleType(QAudioFormat::Float);
    }
}

void AudioTest::endianChanged(int idx)
{
    switch (endianBox->itemText(idx).toInt()) {
        case QAudioFormat::LittleEndian:
            settings.setByteOrder(QAudioFormat::LittleEndian);
            break;
        case QAudioFormat::BigEndian:
            settings.setByteOrder(QAudioFormat::BigEndian);
    }
}