QAudioDevice Class

{
    sourceFile.setFileName("/tmp/test.raw");
    sourceFile.open(QIODevice::ReadOnly);

    QAudioFormat format;
    // Set up the format, eg.
    format.setSampleRate(8000);
    format.setChannelCount(1);
    format.setSampleFormat(QAudioFormat::UInt8);

    QAudioDevice info(QMediaDevices::defaultAudioOutput());
    if (!info.isFormatSupported(format)) {
        qWarning() << "Raw audio format not supported by backend, cannot play audio.";
        return;
    }

    audio = new QAudioSink(format, this);
    connect(audio, SIGNAL(stateChanged(QAudio::State)), this, SLOT(handleStateChanged(QAudio::State)));
    audio->start(&sourceFile);
}

const auto devices = QMediaDevices::audioOutputs();
for (const QAudioDevice &device : devices)
    qDebug() << "Device: " << device.description();

Member Function Documentation

QAudioDevice::QAudioDevice()

Constructs a null QAudioDevice object.

QAudioDevice::QAudioDevice(const QAudioDevice &other)

Constructs a copy of other.

QAudioDevice::QAudioDevice(QAudioDevice &&other)

Move constructs from other.

QAudioDevice::~QAudioDevice()

Destroy this audio device info.

QAudioFormat::ChannelConfig QAudioDevice::channelConfiguration() const

Returns the channel configuration of the device.

bool QAudioDevice::isFormatSupported(const QAudioFormat &settings) const

Returns true if the supplied settings are supported by the audio device described by this QAudioDevice.

bool QAudioDevice::isNull() const

Returns whether this QAudioDevice object holds a valid device definition.

int QAudioDevice::maximumChannelCount() const

Returns the maximum number of supported channel counts.

This is typically 1 for mono sound, or 2 for stereo sound.

int QAudioDevice::maximumSampleRate() const

Returns the maximum supported sample rate (in Hertz).

int QAudioDevice::minimumChannelCount() const

Returns the minimum number of supported channel counts.

This is typically 1 for mono sound, or 2 for stereo sound.

int QAudioDevice::minimumSampleRate() const

Returns the minimum supported sample rate (in Hertz).

QAudioFormat QAudioDevice::preferredFormat() const

Returns the default audio format settings for this device.

These settings are provided by the platform/audio plugin being used.

They are also dependent on the QAudio::Mode being used.

A typical audio system would provide something like:

• Input settings: 48000Hz mono 16 bit.
• Output settings: 48000Hz stereo 16 bit.

QList<QAudioFormat::SampleFormat> QAudioDevice::supportedSampleFormats() const

Returns a list of supported sample types.

void QAudioDevice::swap(QAudioDevice &other)

Swaps the audio device with the other.

bool QAudioDevice::operator!=(const QAudioDevice &other) const

Returns true if this QAudioDevice class represents a different audio device than other

QAudioDevice &QAudioDevice::operator=(QAudioDevice &&other)

Moves other into this QAudioDevice object.

QAudioDevice &QAudioDevice::operator=(const QAudioDevice &other)

Sets the QAudioDevice object to be equal to other.

bool QAudioDevice::operator==(const QAudioDevice &other) const

Returns true if this QAudioDevice class represents the same audio device as other.