QAudioFormat QAudioDeviceInfo::nearestFormat(const QAudioFormat &settings) const
{
if (isFormatSupported(settings))
return settings;
QAudioFormat nearest = settings;
nearest.setCodec(QLatin1String("audio/pcm"));
if (nearest.sampleType() == QAudioFormat::Unknown) {
QAudioFormat preferred = preferredFormat();
nearest.setSampleType(preferred.sampleType());
}
QMap<int,int> testFrequencies;
QList<int> frequenciesAvailable = supportedFrequencies();
QMap<int,int> testSampleSizes;
QList<int> sampleSizesAvailable = supportedSampleSizes();
// Get sorted sampleSizes (equal to and ascending values only)
if (sampleSizesAvailable.contains(settings.sampleSize()))
testSampleSizes.insert(0,settings.sampleSize());
sampleSizesAvailable.removeAll(settings.sampleSize());
foreach (int size, sampleSizesAvailable) {
int larger = (size > settings.sampleSize()) ? size : settings.sampleSize();
int smaller = (size > settings.sampleSize()) ? settings.sampleSize() : size;
if (size >= settings.sampleSize()) {
int diff = larger - smaller;
testSampleSizes.insert(diff, size);
}
}
bool ViAudioFormat::isValid(bool includingCodec) const
{
ViFormatMap sizes = supportedSampleSizes();
if(!sizes.contains(mSampleSize))
{
return false;
}
ViFormatMap rates = supportedSampleRates();
if(!rates.contains(mSampleRate))
{
return false;
}
ViFormatMap types = supportedSampleTypes();
if(!types.contains(mSampleType))
{
return false;
}
ViFormatMap endianness = supportedEndianness();
if(!endianness.contains(mByteOrder))
{
return false;
}
ViFormatMap channels = supportedChannels();
if(!channels.contains(mChannelCount))
{
return false;
}
if(includingCodec && !hasCodec())
{
return false;
}
return true;
}
ViAudioFormat ViAudioFormat::defaultFormat()
{
ViAudioFormat format;
format.setSampleSize(supportedSampleSizes().defaultValue());
format.setSampleRate(supportedSampleRates().defaultValue());
format.setSampleType(ViAudioFormat::SampleType(supportedSampleTypes().defaultValue()));
format.setChannelCount(supportedChannels().defaultValue());
format.setBitrate(ViAudioBitrate(ViAudioBitrate::Mode(supportedBitrateModes().defaultValue()), supportedBitrates().defaultValue()));
format.setByteOrder(ViAudioFormat::Endian(supportedEndianness().defaultValue()));
format.setQuality(ViAudioFormat::Quality(supportedQualities().defaultValue()));
format.setCodec(ViAudioManager::codec("WAVE"));
return format;
}
/*!
Returns the closest QAudioFormat to the supplied \a settings that the system supports.
These settings are provided by the platform/audio plugin being used.
They are also dependent on the \l {QAudio}::Mode being used.
*/
QAudioFormat QAudioDeviceInfo::nearestFormat(const QAudioFormat &settings) const
{
if (isFormatSupported(settings))
return settings;
QAudioFormat nearest = settings;
QList<QString> testCodecs = supportedCodecs();
QList<int> testChannels = supportedChannelCounts();
QList<QAudioFormat::Endian> testByteOrders = supportedByteOrders();
QList<QAudioFormat::SampleType> testSampleTypes;
QList<QAudioFormat::SampleType> sampleTypesAvailable = supportedSampleTypes();
QMap<int,int> testSampleRates;
QList<int> sampleRatesAvailable = supportedSampleRates();
QMap<int,int> testSampleSizes;
QList<int> sampleSizesAvailable = supportedSampleSizes();
// Get sorted lists for checking
if (testCodecs.contains(settings.codec())) {
testCodecs.removeAll(settings.codec());
testCodecs.insert(0, settings.codec());
}
testChannels.removeAll(settings.channelCount());
testChannels.insert(0, settings.channelCount());
testByteOrders.removeAll(settings.byteOrder());
testByteOrders.insert(0, settings.byteOrder());
if (sampleTypesAvailable.contains(settings.sampleType()))
testSampleTypes.append(settings.sampleType());
if (sampleTypesAvailable.contains(QAudioFormat::SignedInt))
testSampleTypes.append(QAudioFormat::SignedInt);
if (sampleTypesAvailable.contains(QAudioFormat::UnSignedInt))
testSampleTypes.append(QAudioFormat::UnSignedInt);
if (sampleTypesAvailable.contains(QAudioFormat::Float))
testSampleTypes.append(QAudioFormat::Float);
if (sampleSizesAvailable.contains(settings.sampleSize()))
testSampleSizes.insert(0,settings.sampleSize());
sampleSizesAvailable.removeAll(settings.sampleSize());
foreach (int size, sampleSizesAvailable) {
int larger = (size > settings.sampleSize()) ? size : settings.sampleSize();
int smaller = (size > settings.sampleSize()) ? settings.sampleSize() : size;
bool isMultiple = ( 0 == (larger % smaller));
int diff = larger - smaller;
testSampleSizes.insert((isMultiple ? diff : diff+100000), size);
}