Exemple #1
0
void xmppClient::slotConnected()
{
    QXmppCall *call = qobject_cast<QXmppCall*>(sender());
    Q_ASSERT(call);

    qDebug() << "Call connected";
    QXmppRtpChannel *channel = call->audioChannel();

    // prepare audio format
    QAudioFormat format;
    format.setFrequency(channel->payloadType().clockrate());
    format.setChannels(channel->payloadType().channels());
    format.setSampleSize(16);
    format.setCodec("audio/pcm");
    format.setByteOrder(QAudioFormat::LittleEndian);
    format.setSampleType(QAudioFormat::SignedInt);

    // the size in bytes of the audio buffers to/from sound devices
    // 160 ms seems to be the minimum to work consistently on Linux/Mac/Windows
    const int bufferSize = (format.frequency() * format.channels() * (format.sampleSize() / 8) * 160) / 1000;

    // initialise audio output
    QAudioOutput *audioOutput = new QAudioOutput(format, this);
    audioOutput->setBufferSize(bufferSize);
    audioOutput->start(channel);

    // initialise audio input
    QAudioInput *audioInput = new QAudioInput(format, this);
    audioInput->setBufferSize(bufferSize);
    audioInput->start(channel);
}
void xmppClient::slotAudioModeChanged(QIODevice::OpenMode mode)
{
    QXmppCall *call = qobject_cast<QXmppCall*>(sender());
    Q_ASSERT(call);
    QXmppRtpAudioChannel *channel = call->audioChannel();

    // prepare audio format
    QAudioFormat format;
    format.setSampleRate(channel->payloadType().clockrate());
    format.setChannelCount(channel->payloadType().channels());
    format.setSampleSize(16);
    format.setCodec("audio/pcm");
    format.setByteOrder(QAudioFormat::LittleEndian);
    format.setSampleType(QAudioFormat::SignedInt);

    // the size in bytes of the audio buffers to/from sound devices
    // 160 ms seems to be the minimum to work consistently on Linux/Mac/Windows
    const int bufferSize = (format.sampleRate() * format.channelCount() * (format.sampleSize() / 8) * 160) / 1000;

    if (mode & QIODevice::ReadOnly) {
        // initialise audio output
        QAudioOutput *audioOutput = new QAudioOutput(format, this);
        audioOutput->setBufferSize(bufferSize);
        audioOutput->start(channel);
    }

    if (mode & QIODevice::WriteOnly) {
        // initialise audio input
        QAudioInput *audioInput = new QAudioInput(format, this);
        audioInput->setBufferSize(bufferSize);
        audioInput->start(channel);
    }
}
Exemple #3
0
void Engine::startListening()
{
    QAudioFormat format;
    // Set up the desired format, for example:
    format.setSampleRate(8000);
    format.setChannelCount(1);
    format.setSampleSize(8);
    format.setCodec("audio/pcm");
    format.setByteOrder(QAudioFormat::LittleEndian);
    format.setSampleType(QAudioFormat::UnSignedInt);

    QAudioDeviceInfo info = QAudioDeviceInfo::defaultInputDevice();
    if (!info.isFormatSupported(format)) {
        qWarning() << "Default format not supported, trying to use the nearest.";
        format = info.nearestFormat(format);
    }

    QAudioInput *audio = new QAudioInput(format, this);

    QBuffer buffer;

    audio->start(&buffer);
}