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);
}
}
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);
}
