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); } }