void GuitarTuner::initAudioOutput()
{
m_format_output.setSampleRate(DataFrequencyHzOutput);
m_format_output.setCodec("audio/pcm");
m_format_output.setSampleSize(16);
m_format_output.setChannelCount(1);
m_format_output.setByteOrder(QAudioFormat::LittleEndian);
m_format_output.setSampleType(QAudioFormat::SignedInt);
QAudioDeviceInfo outputDeviceInfo(
QAudioDeviceInfo::defaultOutputDevice());
if (!outputDeviceInfo.isFormatSupported(m_format_output)) {
m_format_output = outputDeviceInfo.nearestFormat(m_format_output);
}
m_audioOutput = new QAudioOutput(outputDeviceInfo,
m_format_output, this);
m_voicegenerator = new VoiceGenerator(m_format_output,
getFrequency(),
getVolume(),
this);
connect(m_audioOutput, SIGNAL(stateChanged(QAudio::State)),
SLOT(outputStateChanged(QAudio::State)));
}
/**
* Inits audio output.
*/
void GuitarTuner::initAudioOutput()
{
// Set up the output format.
m_format_output.setFrequency(DataFrequencyHzOutput);
m_format_output.setCodec("audio/pcm");
m_format_output.setSampleSize(16);
m_format_output.setChannels(1);
m_format_output.setByteOrder(QAudioFormat::LittleEndian);
m_format_output.setSampleType(QAudioFormat::SignedInt);
// Obtain a default output device, and if the format is not
// supported, find the nearest format available.
QAudioDeviceInfo outputDeviceInfo(
QAudioDeviceInfo::defaultOutputDevice());
if (!outputDeviceInfo.isFormatSupported(m_format_output)) {
m_format_output = outputDeviceInfo.nearestFormat(m_format_output);
}
// Create new QAudioOutput and VoiceGenerator instances, and store
// them in m_audioOutput and m_voicegenerator, respectively.
m_audioOutput = new QAudioOutput(outputDeviceInfo,
m_format_output, this);
m_voicegenerator = new VoiceGenerator(m_format_output,
qmlObject->property("frequency").toReal(),
qmlObject->property("volume").toReal(),
this);
// Connect m_audioOutput stateChanged signal to outputStateChanged.
connect(m_audioOutput, SIGNAL(stateChanged(QAudio::State)),
SLOT(outputStateChanged(QAudio::State)));
}
