audiodevices.cpp Example File

multimedia/audiodevices/audiodevices.cpp
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#include "audiodevices.h" // Utility functions for converting QAudioFormat fields into text static QString toString(QAudioFormat::SampleType sampleType) { QString result("Unknown"); switch (sampleType) { case QAudioFormat::SignedInt: result = "SignedInt"; break; case QAudioFormat::UnSignedInt: result = "UnSignedInt"; break; case QAudioFormat::Float: result = "Float"; break; case QAudioFormat::Unknown: result = "Unknown"; } return result; } static QString toString(QAudioFormat::Endian endian) { QString result("Unknown"); switch (endian) { case QAudioFormat::LittleEndian: result = "LittleEndian"; break; case QAudioFormat::BigEndian: result = "BigEndian"; break; } return result; } AudioDevicesBase::AudioDevicesBase(QWidget *parent) : QMainWindow(parent) { setupUi(this); } AudioDevicesBase::~AudioDevicesBase() {} AudioTest::AudioTest(QWidget *parent) : AudioDevicesBase(parent) { connect(testButton, &QPushButton::clicked, this, &AudioTest::test); connect(modeBox, QOverload<int>::of(&QComboBox::activated), this, &AudioTest::modeChanged); connect(deviceBox, QOverload<int>::of(&QComboBox::activated), this, &AudioTest::deviceChanged); connect(sampleRateBox, QOverload<int>::of(&QComboBox::activated), this, &AudioTest::sampleRateChanged); connect(channelsBox, QOverload<int>::of(&QComboBox::activated), this, &AudioTest::channelChanged); connect(codecsBox, QOverload<int>::of(&QComboBox::activated), this, &AudioTest::codecChanged); connect(sampleSizesBox, QOverload<int>::of(&QComboBox::activated), this, &AudioTest::sampleSizeChanged); connect(sampleTypesBox, QOverload<int>::of(&QComboBox::activated), this, &AudioTest::sampleTypeChanged); connect(endianBox, QOverload<int>::of(&QComboBox::activated), this, &AudioTest::endianChanged); connect(populateTableButton, &QPushButton::clicked, this, &AudioTest::populateTable); modeBox->setCurrentIndex(0); modeChanged(0); deviceBox->setCurrentIndex(0); deviceChanged(0); } void AudioTest::test() { // tries to set all the settings picked. testResult->clear(); if (!m_deviceInfo.isNull()) { if (m_deviceInfo.isFormatSupported(m_settings)) { testResult->setText(tr("Success")); nearestSampleRate->setText(""); nearestChannel->setText(""); nearestCodec->setText(""); nearestSampleSize->setText(""); nearestSampleType->setText(""); nearestEndian->setText(""); } else { QAudioFormat nearest = m_deviceInfo.nearestFormat(m_settings); testResult->setText(tr("Failed")); nearestSampleRate->setText(QString("%1").arg(nearest.sampleRate())); nearestChannel->setText(QString("%1").arg(nearest.channelCount())); nearestCodec->setText(nearest.codec()); nearestSampleSize->setText(QString("%1").arg(nearest.sampleSize())); nearestSampleType->setText(toString(nearest.sampleType())); nearestEndian->setText(toString(nearest.byteOrder())); } } else testResult->setText(tr("No Device")); } void AudioTest::modeChanged(int idx) { testResult->clear(); deviceBox->clear(); const QAudio::Mode mode = idx == 0 ? QAudio::AudioInput : QAudio::AudioOutput; for (auto &deviceInfo: QAudioDeviceInfo::availableDevices(mode)) deviceBox->addItem(deviceInfo.deviceName(), qVariantFromValue(deviceInfo)); deviceBox->setCurrentIndex(0); deviceChanged(0); } void AudioTest::deviceChanged(int idx) { testResult->clear(); if (deviceBox->count() == 0) return; // device has changed m_deviceInfo = deviceBox->itemData(idx).value<QAudioDeviceInfo>(); sampleRateBox->clear(); QList<int> sampleRatez = m_deviceInfo.supportedSampleRates(); for (int i = 0; i < sampleRatez.size(); ++i) sampleRateBox->addItem(QString("%1").arg(sampleRatez.at(i))); if (sampleRatez.size()) m_settings.setSampleRate(sampleRatez.at(0)); channelsBox->clear(); QList<int> chz = m_deviceInfo.supportedChannelCounts(); for (int i = 0; i < chz.size(); ++i) channelsBox->addItem(QString("%1").arg(chz.at(i))); if (chz.size()) m_settings.setChannelCount(chz.at(0)); codecsBox->clear(); QStringList codecs = m_deviceInfo.supportedCodecs(); for (int i = 0; i < codecs.size(); ++i) codecsBox->addItem(QString("%1").arg(codecs.at(i))); if (codecs.size()) m_settings.setCodec(codecs.at(0)); // Add false to create failed condition! codecsBox->addItem("audio/test"); sampleSizesBox->clear(); QList<int> sampleSizez = m_deviceInfo.supportedSampleSizes(); for (int i = 0; i < sampleSizez.size(); ++i) sampleSizesBox->addItem(QString("%1").arg(sampleSizez.at(i))); if (sampleSizez.size()) m_settings.setSampleSize(sampleSizez.at(0)); sampleTypesBox->clear(); QList<QAudioFormat::SampleType> sampleTypez = m_deviceInfo.supportedSampleTypes(); for (int i = 0; i < sampleTypez.size(); ++i) sampleTypesBox->addItem(toString(sampleTypez.at(i))); if (sampleTypez.size()) m_settings.setSampleType(sampleTypez.at(0)); endianBox->clear(); QList<QAudioFormat::Endian> endianz = m_deviceInfo.supportedByteOrders(); for (int i = 0; i < endianz.size(); ++i) endianBox->addItem(toString(endianz.at(i))); if (endianz.size()) m_settings.setByteOrder(endianz.at(0)); allFormatsTable->clearContents(); } void AudioTest::populateTable() { int row = 0; QAudioFormat format; for (auto codec: m_deviceInfo.supportedCodecs()) { format.setCodec(codec); for (auto sampleRate: m_deviceInfo.supportedSampleRates()) { format.setSampleRate(sampleRate); for (auto channels: m_deviceInfo.supportedChannelCounts()) { format.setChannelCount(channels); for (auto sampleType: m_deviceInfo.supportedSampleTypes()) { format.setSampleType(sampleType); for (auto sampleSize: m_deviceInfo.supportedSampleSizes()) { format.setSampleSize(sampleSize); for (auto endian: m_deviceInfo.supportedByteOrders()) { format.setByteOrder(endian); if (m_deviceInfo.isFormatSupported(format)) { allFormatsTable->setRowCount(row + 1); QTableWidgetItem *codecItem = new QTableWidgetItem(format.codec()); allFormatsTable->setItem(row, 0, codecItem); QTableWidgetItem *sampleRateItem = new QTableWidgetItem(QString("%1").arg(format.sampleRate())); allFormatsTable->setItem(row, 1, sampleRateItem); QTableWidgetItem *channelsItem = new QTableWidgetItem(QString("%1").arg(format.channelCount())); allFormatsTable->setItem(row, 2, channelsItem); QTableWidgetItem *sampleTypeItem = new QTableWidgetItem(toString(format.sampleType())); allFormatsTable->setItem(row, 3, sampleTypeItem); QTableWidgetItem *sampleSizeItem = new QTableWidgetItem(QString("%1").arg(format.sampleSize())); allFormatsTable->setItem(row, 4, sampleSizeItem); QTableWidgetItem *byteOrderItem = new QTableWidgetItem(toString(format.byteOrder())); allFormatsTable->setItem(row, 5, byteOrderItem); ++row; } } } } } } } } void AudioTest::sampleRateChanged(int idx) { // sample rate has changed m_settings.setSampleRate(sampleRateBox->itemText(idx).toInt()); } void AudioTest::channelChanged(int idx) { m_settings.setChannelCount(channelsBox->itemText(idx).toInt()); } void AudioTest::codecChanged(int idx) { m_settings.setCodec(codecsBox->itemText(idx)); } void AudioTest::sampleSizeChanged(int idx) { m_settings.setSampleSize(sampleSizesBox->itemText(idx).toInt()); } void AudioTest::sampleTypeChanged(int idx) { switch (sampleTypesBox->itemText(idx).toInt()) { case QAudioFormat::SignedInt: m_settings.setSampleType(QAudioFormat::SignedInt); break; case QAudioFormat::UnSignedInt: m_settings.setSampleType(QAudioFormat::UnSignedInt); break; case QAudioFormat::Float: m_settings.setSampleType(QAudioFormat::Float); } } void AudioTest::endianChanged(int idx) { switch (endianBox->itemText(idx).toInt()) { case QAudioFormat::LittleEndian: m_settings.setByteOrder(QAudioFormat::LittleEndian); break; case QAudioFormat::BigEndian: m_settings.setByteOrder(QAudioFormat::BigEndian); } }

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