QAudioDeviceInfoInternal Class Reference

#include <qaudiodeviceinfo_alsa_p.h>

Inheritance diagram for QAudioDeviceInfoInternal:

Public Functions
QList< QAudioFormat::Endian >	byteOrderList ()
	Returns the list of currently available byte orders. More...
QList< QAudioFormat::Endian >	byteOrderList ()
	Returns the list of currently available byte orders. More...
QList< QAudioFormat::Endian >	byteOrderList ()
	Returns the list of currently available byte orders. More...
QList< int >	channelsList ()
	Returns the list of currently available channels. More...
QList< int >	channelsList ()
	Returns the list of currently available channels. More...
QList< int >	channelsList ()
	Returns the list of currently available channels. More...
void	close ()
QStringList	codecList ()
	Returns the list of currently available codecs. More...
QStringList	codecList ()
	Returns the list of currently available codecs. More...
QStringList	codecList ()
	Returns the list of currently available codecs. More...
QString	deviceName () const
	Returns the audio device name. More...
QString	deviceName () const
	Returns the audio device name. More...
QString	deviceName () const
	Returns the audio device name. More...
QList< int >	frequencyList ()
	Returns the list of currently available frequencies. More...
QList< int >	frequencyList ()
	Returns the list of currently available frequencies. More...
QList< int >	frequencyList ()
	Returns the list of currently available frequencies. More...
bool	isFormatSupported (const QAudioFormat &format) const
	Returns true if format is available from audio device. More...
bool	isFormatSupported (const QAudioFormat &format) const
	Returns true if format is available from audio device. More...
bool	isFormatSupported (const QAudioFormat &format) const
	Returns true if format is available from audio device. More...
QAudioFormat	nearestFormat (const QAudioFormat &format) const
	Returns the nearest settings format. More...
QAudioFormat	nearestFormat (const QAudioFormat &format) const
	Returns the nearest settings format. More...
QAudioFormat	nearestFormat (const QAudioFormat &format) const
	Returns the nearest settings format. More...
bool	open ()
QAudioFormat	preferredFormat () const
	Returns the nearest settings. More...
QAudioFormat	preferredFormat () const
	Returns the nearest settings. More...
QAudioFormat	preferredFormat () const
	Returns the nearest settings. More...
	QAudioDeviceInfoInternal (QByteArray const &handle, QAudio::Mode mode)
	QAudioDeviceInfoInternal (QByteArray dev, QAudio::Mode mode)
	QAudioDeviceInfoInternal (QByteArray dev, QAudio::Mode mode)
QList< int >	sampleSizeList ()
	Returns the list of currently available sample sizes. More...
QList< int >	sampleSizeList ()
	Returns the list of currently available sample sizes. More...
QList< int >	sampleSizeList ()
	Returns the list of currently available sample sizes. More...
QList< QAudioFormat::SampleType >	sampleTypeList ()
	Returns the list of currently available sample types. More...
QList< QAudioFormat::SampleType >	sampleTypeList ()
	Returns the list of currently available sample types. More...
QList< QAudioFormat::SampleType >	sampleTypeList ()
	Returns the list of currently available sample types. More...
bool	testSettings (const QAudioFormat &format) const
bool	testSettings (const QAudioFormat &format) const
void	updateLists ()
void	updateLists ()
	~QAudioDeviceInfoInternal ()
	~QAudioDeviceInfoInternal ()
Public Functions inherited from QObject
bool	blockSignals (bool b)
	If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it). More...
const QObjectList &	children () const
	Returns a list of child objects. More...
bool	connect (const QObject *sender, const char *signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const
bool	disconnect (const char *signal=0, const QObject *receiver=0, const char *member=0)
bool	disconnect (const QObject *receiver, const char *member=0)
void	dumpObjectInfo ()
	Dumps information about signal connections, etc. More...
void	dumpObjectTree ()
	Dumps a tree of children to the debug output. More...
QList< QByteArray >	dynamicPropertyNames () const
	Returns the names of all properties that were dynamically added to the object using setProperty(). More...
virtual bool	event (QEvent *)
	This virtual function receives events to an object and should return true if the event e was recognized and processed. More...
virtual bool	eventFilter (QObject *, QEvent *)
	Filters events if this object has been installed as an event filter for the watched object. More...
template<typename T >
T	findChild (const QString &aName=QString()) const
	Returns the child of this object that can be cast into type T and that is called name, or 0 if there is no such object. More...
template<typename T >
QList< T >	findChildren (const QString &aName=QString()) const
	Returns all children of this object with the given name that can be cast to type T, or an empty list if there are no such objects. More...
template<typename T >
QList< T >	findChildren (const QRegExp &re) const
bool	inherits (const char *classname) const
	Returns true if this object is an instance of a class that inherits className or a QObject subclass that inherits className; otherwise returns false. More...
void	installEventFilter (QObject *)
	Installs an event filter filterObj on this object. More...
bool	isWidgetType () const
	Returns true if the object is a widget; otherwise returns false. More...
void	killTimer (int id)
	Kills the timer with timer identifier, id. More...
virtual const QMetaObject *	metaObject () const
	Returns a pointer to the meta-object of this object. More...
void	moveToThread (QThread *thread)
	Changes the thread affinity for this object and its children. More...
QString	objectName () const
QObject *	parent () const
	Returns a pointer to the parent object. More...
QVariant	property (const char *name) const
	Returns the value of the object's name property. More...
Q_INVOKABLE	QObject (QObject *parent=0)
	Constructs an object with parent object parent. More...
void	removeEventFilter (QObject *)
	Removes an event filter object obj from this object. More...
void	setObjectName (const QString &name)
void	setParent (QObject *)
	Makes the object a child of parent. More...
bool	setProperty (const char *name, const QVariant &value)
	Sets the value of the object's name property to value. More...
void	setUserData (uint id, QObjectUserData *data)
bool	signalsBlocked () const
	Returns true if signals are blocked; otherwise returns false. More...
int	startTimer (int interval)
	Starts a timer and returns a timer identifier, or returns zero if it could not start a timer. More...
QThread *	thread () const
	Returns the thread in which the object lives. More...
QObjectUserData *	userData (uint id) const
virtual	~QObject ()
	Destroys the object, deleting all its child objects. More...

Static Public Functions
static QList< QByteArray >	availableDevices (QAudio::Mode mode)
static QList< QByteArray >	availableDevices (QAudio::Mode)
static QList< QByteArray >	availableDevices (QAudio::Mode)
static QByteArray	defaultInputDevice ()
static QByteArray	defaultInputDevice ()
static QByteArray	defaultInputDevice ()
static QByteArray	defaultOutputDevice ()
static QByteArray	defaultOutputDevice ()
static QByteArray	defaultOutputDevice ()
Static Public Functions inherited from QObject
static bool	connect (const QObject *sender, const char *signal, const QObject *receiver, const char *member, Qt::ConnectionType=Qt::AutoConnection)
	Creates a connection of the given type from the signal in the sender object to the method in the receiver object. More...
static bool	connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection)
static bool	disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *member)
	Disconnects signal in object sender from method in object receiver. More...
static bool	disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &member)
static uint	registerUserData ()
static QString	tr (const char *sourceText, const char *comment=0, int n=-1)
static QString	trUtf8 (const char *sourceText, const char *comment=0, int n=-1)

Public Variables
AudioDeviceID	deviceId
QString	name

Private Functions
void	close ()
bool	open ()

Properties
QList< QAudioFormat::Endian >	byteOrderz
QList< int >	channelz
QStringList	codecz
QString	device
QList< int >	freqz
snd_pcm_t *	handle
QAudio::Mode	mode
QAudioFormat	nearest
snd_pcm_hw_params_t *	params
QList< int >	sizez
QList< QAudioFormat::SampleType >	typez

Additional Inherited Members
Public Slots inherited from QObject
void	deleteLater ()
	Schedules this object for deletion. More...
Signals inherited from QObject
void	destroyed (QObject *=0)
	This signal is emitted immediately before the object obj is destroyed, and can not be blocked. More...
Static Public Variables inherited from QObject
static const QMetaObject	staticMetaObject
	This variable stores the meta-object for the class. More...
Protected Functions inherited from QObject
virtual void	childEvent (QChildEvent *)
	This event handler can be reimplemented in a subclass to receive child events. More...
virtual void	connectNotify (const char *signal)
	This virtual function is called when something has been connected to signal in this object. More...
virtual void	customEvent (QEvent *)
	This event handler can be reimplemented in a subclass to receive custom events. More...
virtual void	disconnectNotify (const char *signal)
	This virtual function is called when something has been disconnected from signal in this object. More...
	QObject (QObjectPrivate &dd, QObject *parent=0)
int	receivers (const char *signal) const
	Returns the number of receivers connected to the signal. More...
QObject *	sender () const
	Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns 0. More...
int	senderSignalIndex () const
virtual void	timerEvent (QTimerEvent *)
	This event handler can be reimplemented in a subclass to receive timer events for the object. More...
Protected Variables inherited from QObject
QScopedPointer< QObjectData >	d_ptr
Static Protected Variables inherited from QObject
static const QMetaObject	staticQtMetaObject
Related Functions inherited from QObject
T	qFindChildqFindChildren (const QObject *obj, const QString &name)()
QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QString &name)()
QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QRegExp &regExp)()
T *	qobject_cast (QObject *object)
	QObjectList
void *	qt_find_obj_child (QObject *parent, const char *type, const QString &name)
	Returns a pointer to the object named name that inherits type and with a given parent. More...

Detailed Description

Definition at line 74 of file qaudiodeviceinfo_alsa_p.h.

Constructors and Destructors

QAudioDeviceInfoInternal() [1/3]

QAudioDeviceInfoInternal::QAudioDeviceInfoInternal	(	QByteArray	dev,
		QAudio::Mode	mode
	)

Definition at line 59 of file qaudiodeviceinfo_alsa_p.cpp.

{
    handle = 0;

    device = QLatin1String(dev);
    this->mode = mode;

#if (SND_LIB_MAJOR == 1 && SND_LIB_MINOR == 0 && SND_LIB_SUBMINOR >= 14)
    checkSurround();
#endif
}

~QAudioDeviceInfoInternal() [1/2]

QAudioDeviceInfoInternal::~QAudioDeviceInfoInternal

(

)

Definition at line 71 of file qaudiodeviceinfo_alsa_p.cpp.

{
    close();
}

QAudioDeviceInfoInternal() [2/3]

QAudioDeviceInfoInternal::QAudioDeviceInfoInternal	(	QByteArray const &	handle,
		QAudio::Mode	mode
	)

Definition at line 69 of file qaudiodeviceinfo_mac_p.cpp.

{
    QDataStream ds(handle);
    quint32 did, tm;

    ds >> did >> tm >> name;
    deviceId = AudioDeviceID(did);
    mode = QAudio::Mode(tm);
}

QAudioDeviceInfoInternal() [3/3]

QAudioDeviceInfoInternal::QAudioDeviceInfoInternal	(	QByteArray	dev,
		QAudio::Mode	mode
	)

~QAudioDeviceInfoInternal() [2/2]

QAudioDeviceInfoInternal::~QAudioDeviceInfoInternal

(

)

Functions

availableDevices() [1/3]

static QList<QByteArray> QAudioDeviceInfoInternal::availableDevices ( QAudio::Mode  mode )

static

availableDevices() [2/3]

QList< QByteArray > QAudioDeviceInfoInternal::availableDevices ( QAudio::Mode  mode )

static

Definition at line 416 of file qaudiodeviceinfo_alsa_p.cpp.

Referenced by QAudioDeviceFactory::availableDevices(), defaultInputDevice(), defaultOutputDevice(), get_device_info(), open(), QAudioInputPrivate::open(), QAudioOutputPrivate::open(), and testSettings().

{
    QList<QByteArray> allDevices;
    QList<QByteArray> devices;
    QByteArray filter;

#if(SND_LIB_MAJOR == 1 && SND_LIB_MINOR == 0 && SND_LIB_SUBMINOR >= 14)
    // Create a list of all current audio devices that support mode
    void **hints, **n;
    char *name, *descr, *io;

    if(snd_device_name_hint(-1, "pcm", &hints) < 0) {
        qWarning() << "no alsa devices available";
        return devices;
    }
    n = hints;

    if(mode == QAudio::AudioInput) {
        filter = "Input";
    } else {
        filter = "Output";
    }

    while (*n != NULL) {
        name = snd_device_name_get_hint(*n, "NAME");
        if (name != 0 && qstrcmp(name, "null") != 0) {
            descr = snd_device_name_get_hint(*n, "DESC");
            io = snd_device_name_get_hint(*n, "IOID");

            if ((descr != NULL) && ((io == NULL) || (io == filter))) {
                QString deviceName = QLatin1String(name);
                QString deviceDescription = QLatin1String(descr);
                allDevices.append(deviceName.toLocal8Bit().constData());
                if (deviceDescription.contains(QLatin1String("Default Audio Device")))
                    devices.append(deviceName.toLocal8Bit().constData());
            }

            free(name);
            if (descr != NULL)
                free(descr);
            if (io != NULL)
                free(io);
        }
        ++n;
    }
    snd_device_name_free_hint(hints);

    if(devices.size() > 0) {
        devices.append("default");
    }
#else
    int idx = 0;
    char* name;

    while(snd_card_get_name(idx,&name) == 0) {
        devices.append(name);
        idx++;
    }
    if (idx > 0)
        devices.append("default");
#endif
    if (devices.size() == 0 && allDevices.size() > 0)
        return allDevices;

    return devices;
}

availableDevices() [3/3]

static QList<QByteArray> QAudioDeviceInfoInternal::availableDevices ( QAudio::Mode  )

static

byteOrderList() [1/3]

QList<QAudioFormat::Endian> QAudioDeviceInfoInternal::byteOrderList ( )

virtual

Returns the list of currently available byte orders.

Implements QAbstractAudioDeviceInfo.

byteOrderList() [2/3]

QList< QAudioFormat::Endian > QAudioDeviceInfoInternal::byteOrderList ( )

virtual

Returns the list of currently available byte orders.

Implements QAbstractAudioDeviceInfo.

Definition at line 143 of file qaudiodeviceinfo_alsa_p.cpp.

Referenced by QAudioDeviceInfoInternal().

{
    updateLists();
    return byteOrderz;
}

byteOrderList() [3/3]

QList<QAudioFormat::Endian> QAudioDeviceInfoInternal::byteOrderList ( )

virtual

Returns the list of currently available byte orders.

Implements QAbstractAudioDeviceInfo.

channelsList() [1/3]

QList<int> QAudioDeviceInfoInternal::channelsList ( )

virtual

Returns the list of currently available channels.

Implements QAbstractAudioDeviceInfo.

channelsList() [2/3]

QList< int > QAudioDeviceInfoInternal::channelsList ( )

virtual

Returns the list of currently available channels.

Implements QAbstractAudioDeviceInfo.

Definition at line 131 of file qaudiodeviceinfo_alsa_p.cpp.

Referenced by QAudioDeviceInfoInternal().

{
    updateLists();
    return channelz;
}

channelsList() [3/3]

QList<int> QAudioDeviceInfoInternal::channelsList ( )

virtual

Returns the list of currently available channels.

Implements QAbstractAudioDeviceInfo.

close() [1/2]

void QAudioDeviceInfoInternal::close

(

)

close() [2/2]

void QAudioDeviceInfoInternal::close ( )

private

Definition at line 196 of file qaudiodeviceinfo_alsa_p.cpp.

Referenced by updateLists(), and ~QAudioDeviceInfoInternal().

{
    if(handle)
        snd_pcm_close(handle);
    handle = 0;
}

codecList() [1/3]

QStringList QAudioDeviceInfoInternal::codecList ( )

virtual

Returns the list of currently available codecs.

Implements QAbstractAudioDeviceInfo.

codecList() [2/3]

QStringList QAudioDeviceInfoInternal::codecList ( )

virtual

Returns the list of currently available codecs.

Implements QAbstractAudioDeviceInfo.

Definition at line 119 of file qaudiodeviceinfo_alsa_p.cpp.

Referenced by QAudioDeviceInfoInternal().

{
    updateLists();
    return codecz;
}

codecList() [3/3]

QStringList QAudioDeviceInfoInternal::codecList ( )

virtual

Returns the list of currently available codecs.

Implements QAbstractAudioDeviceInfo.

defaultInputDevice() [1/3]

static QByteArray QAudioDeviceInfoInternal::defaultInputDevice ( )

static

defaultInputDevice() [2/3]

QByteArray QAudioDeviceInfoInternal::defaultInputDevice ( )

static

Definition at line 483 of file qaudiodeviceinfo_alsa_p.cpp.

Referenced by QAudioDeviceFactory::defaultInputDevice(), and get_device_info().

{
    QList<QByteArray> devices = availableDevices(QAudio::AudioInput);
    if(devices.size() == 0)
        return QByteArray();

    return devices.first();
}

defaultInputDevice() [3/3]

static QByteArray QAudioDeviceInfoInternal::defaultInputDevice ( )

static

defaultOutputDevice() [1/3]

static QByteArray QAudioDeviceInfoInternal::defaultOutputDevice ( )

static

defaultOutputDevice() [2/3]

QByteArray QAudioDeviceInfoInternal::defaultOutputDevice ( )

static

Definition at line 492 of file qaudiodeviceinfo_alsa_p.cpp.

Referenced by QAudioDeviceFactory::defaultOutputDevice(), and get_device_info().

{
    QList<QByteArray> devices = availableDevices(QAudio::AudioOutput);
    if(devices.size() == 0)
        return QByteArray();

    return devices.first();
}

defaultOutputDevice() [3/3]

static QByteArray QAudioDeviceInfoInternal::defaultOutputDevice ( )

static

deviceName() [1/3]

QString QAudioDeviceInfoInternal::deviceName ( ) const

virtual

Returns the audio device name.

Implements QAbstractAudioDeviceInfo.

deviceName() [2/3]

QString QAudioDeviceInfoInternal::deviceName ( ) const

virtual

Returns the audio device name.

Implements QAbstractAudioDeviceInfo.

Definition at line 114 of file qaudiodeviceinfo_alsa_p.cpp.

Referenced by availableDevices(), defaultOutputDevice(), and QAudioDeviceInfoInternal().

{
    return device;
}

deviceName() [3/3]

QString QAudioDeviceInfoInternal::deviceName ( ) const

virtual

Returns the audio device name.

Implements QAbstractAudioDeviceInfo.

frequencyList() [1/3]

QList<int> QAudioDeviceInfoInternal::frequencyList ( )

virtual

Returns the list of currently available frequencies.

Implements QAbstractAudioDeviceInfo.

frequencyList() [2/3]

QList< int > QAudioDeviceInfoInternal::frequencyList ( )

virtual

Returns the list of currently available frequencies.

Implements QAbstractAudioDeviceInfo.

Definition at line 125 of file qaudiodeviceinfo_alsa_p.cpp.

Referenced by QAudioDeviceInfoInternal().

{
    updateLists();
    return freqz;
}

frequencyList() [3/3]

QList<int> QAudioDeviceInfoInternal::frequencyList ( )

virtual

Returns the list of currently available frequencies.

Implements QAbstractAudioDeviceInfo.

isFormatSupported() [1/3]

bool QAudioDeviceInfoInternal::isFormatSupported ( const QAudioFormat &  format ) const

virtual

Returns true if format is available from audio device.

Implements QAbstractAudioDeviceInfo.

isFormatSupported() [2/3]

bool QAudioDeviceInfoInternal::isFormatSupported ( const QAudioFormat &  format ) const

virtual

Returns true if format is available from audio device.

Implements QAbstractAudioDeviceInfo.

Definition at line 76 of file qaudiodeviceinfo_alsa_p.cpp.

Referenced by QAudioDeviceInfoInternal().

{
    return testSettings(format);
}

isFormatSupported() [3/3]

bool QAudioDeviceInfoInternal::isFormatSupported ( const QAudioFormat &  format ) const

virtual

Returns true if format is available from audio device.

Implements QAbstractAudioDeviceInfo.

nearestFormat() [1/3]

QAudioFormat QAudioDeviceInfoInternal::nearestFormat ( const QAudioFormat &  format ) const

virtual

Returns the nearest settings format.

Implements QAbstractAudioDeviceInfo.

nearestFormat() [2/3]

QAudioFormat QAudioDeviceInfoInternal::nearestFormat ( const QAudioFormat &  format ) const

virtual

Returns the nearest settings format.

Implements QAbstractAudioDeviceInfo.

Definition at line 106 of file qaudiodeviceinfo_alsa_p.cpp.

Referenced by QAudioDeviceInfoInternal().

{
    if(testSettings(format))
        return format;
    else
        return preferredFormat();
}

nearestFormat() [3/3]

QAudioFormat QAudioDeviceInfoInternal::nearestFormat ( const QAudioFormat &  format ) const

virtual

Returns the nearest settings format.

Implements QAbstractAudioDeviceInfo.

open() [1/2]

bool QAudioDeviceInfoInternal::open

(

)

open() [2/2]

bool QAudioDeviceInfoInternal::open ( )

private

Definition at line 155 of file qaudiodeviceinfo_alsa_p.cpp.

Referenced by updateLists().

{
    int err = 0;
    QString dev = device;
    QList<QByteArray> devices = availableDevices(mode);

    if(dev.compare(QLatin1String("default")) == 0) {
#if(SND_LIB_MAJOR == 1 && SND_LIB_MINOR == 0 && SND_LIB_SUBMINOR >= 14)
        dev = QLatin1String(devices.first().constData());
#else
        dev = QLatin1String("hw:0,0");
#endif
    } else {
#if(SND_LIB_MAJOR == 1 && SND_LIB_MINOR == 0 && SND_LIB_SUBMINOR >= 14)
        dev = device;
#else
        int idx = 0;
        char *name;

        QString shortName = device.mid(device.indexOf(QLatin1String("="),0)+1);

    while(snd_card_get_name(idx,&name) == 0) {
            if(dev.contains(QLatin1String(name)))
                break;
            idx++;
    }
        dev = QString(QLatin1String("hw:%1,0")).arg(idx);
#endif
    }
    if(mode == QAudio::AudioOutput) {
        err=snd_pcm_open( &handle,dev.toLocal8Bit().constData(),SND_PCM_STREAM_PLAYBACK,0);
    } else {
        err=snd_pcm_open( &handle,dev.toLocal8Bit().constData(),SND_PCM_STREAM_CAPTURE,0);
    }
    if(err < 0) {
        handle = 0;
        return false;
    }
    return true;
}

preferredFormat() [1/3]

QAudioFormat QAudioDeviceInfoInternal::preferredFormat ( ) const

virtual

Returns the nearest settings.

Implements QAbstractAudioDeviceInfo.

preferredFormat() [2/3]

QAudioFormat QAudioDeviceInfoInternal::preferredFormat ( ) const

virtual

Returns the nearest settings.

Implements QAbstractAudioDeviceInfo.

Definition at line 81 of file qaudiodeviceinfo_alsa_p.cpp.

Referenced by nearestFormat(), and QAudioDeviceInfoInternal().

{
    QAudioFormat nearest;
    if(mode == QAudio::AudioOutput) {
        nearest.setFrequency(44100);
        nearest.setChannels(2);
        nearest.setByteOrder(QAudioFormat::LittleEndian);
        nearest.setSampleType(QAudioFormat::SignedInt);
        nearest.setSampleSize(16);
        nearest.setCodec(QLatin1String("audio/pcm"));
    } else {
        nearest.setFrequency(8000);
        nearest.setChannels(1);
        nearest.setSampleType(QAudioFormat::UnSignedInt);
        nearest.setSampleSize(8);
        nearest.setCodec(QLatin1String("audio/pcm"));
        if(!testSettings(nearest)) {
            nearest.setChannels(2);
            nearest.setSampleSize(16);
            nearest.setSampleType(QAudioFormat::SignedInt);
        }
    }
    return nearest;
}

preferredFormat() [3/3]

QAudioFormat QAudioDeviceInfoInternal::preferredFormat ( ) const

virtual

Returns the nearest settings.

Implements QAbstractAudioDeviceInfo.

sampleSizeList() [1/3]

QList<int> QAudioDeviceInfoInternal::sampleSizeList ( )

virtual

Returns the list of currently available sample sizes.

Implements QAbstractAudioDeviceInfo.

sampleSizeList() [2/3]

QList< int > QAudioDeviceInfoInternal::sampleSizeList ( )

virtual

Returns the list of currently available sample sizes.

Implements QAbstractAudioDeviceInfo.

Definition at line 137 of file qaudiodeviceinfo_alsa_p.cpp.

Referenced by QAudioDeviceInfoInternal().

{
    updateLists();
    return sizez;
}

sampleSizeList() [3/3]

QList<int> QAudioDeviceInfoInternal::sampleSizeList ( )

virtual

Returns the list of currently available sample sizes.

Implements QAbstractAudioDeviceInfo.

sampleTypeList() [1/3]

QList<QAudioFormat::SampleType> QAudioDeviceInfoInternal::sampleTypeList ( )

virtual

Returns the list of currently available sample types.

Implements QAbstractAudioDeviceInfo.

sampleTypeList() [2/3]

QList< QAudioFormat::SampleType > QAudioDeviceInfoInternal::sampleTypeList ( )

virtual

Returns the list of currently available sample types.

Implements QAbstractAudioDeviceInfo.

Definition at line 149 of file qaudiodeviceinfo_alsa_p.cpp.

Referenced by QAudioDeviceInfoInternal().

{
    updateLists();
    return typez;
}

sampleTypeList() [3/3]

QList<QAudioFormat::SampleType> QAudioDeviceInfoInternal::sampleTypeList ( )

virtual

Returns the list of currently available sample types.

Implements QAbstractAudioDeviceInfo.

testSettings() [1/2]

bool QAudioDeviceInfoInternal::testSettings

(

const QAudioFormat &

format

)

const

Definition at line 203 of file qaudiodeviceinfo_alsa_p.cpp.

Referenced by isFormatSupported(), nearestFormat(), and preferredFormat().

{
    // Set nearest to closest settings that do work.
    // See if what is in settings will work (return value).
    int err = 0;
    snd_pcm_t* handle;
    snd_pcm_hw_params_t *params;
    QString dev = device;

    QList<QByteArray> devices = QAudioDeviceInfoInternal::availableDevices(QAudio::AudioOutput);

    if(dev.compare(QLatin1String("default")) == 0) {
#if(SND_LIB_MAJOR == 1 && SND_LIB_MINOR == 0 && SND_LIB_SUBMINOR >= 14)
        dev = QLatin1String(devices.first().constData());
#else
        dev = QLatin1String("hw:0,0");
#endif
    } else {
#if(SND_LIB_MAJOR == 1 && SND_LIB_MINOR == 0 && SND_LIB_SUBMINOR >= 14)
        dev = device;
#else
        int idx = 0;
        char *name;

        QString shortName = device.mid(device.indexOf(QLatin1String("="),0)+1);

        while(snd_card_get_name(idx,&name) == 0) {
            if(shortName.compare(QLatin1String(name)) == 0)
                break;
            idx++;
        }
        dev = QString(QLatin1String("hw:%1,0")).arg(idx);
#endif
    }
    if(mode == QAudio::AudioOutput) {
        err=snd_pcm_open( &handle,dev.toLocal8Bit().constData(),SND_PCM_STREAM_PLAYBACK,0);
    } else {
        err=snd_pcm_open( &handle,dev.toLocal8Bit().constData(),SND_PCM_STREAM_CAPTURE,0);
    }
    if(err < 0) {
        handle = 0;
        return false;
    }

    bool testChannel = false;
    bool testCodec = false;
    bool testFreq = false;
    bool testType = false;
    bool testSize = false;

    int  dir = 0;

    snd_pcm_nonblock( handle, 0 );
    snd_pcm_hw_params_alloca( &params );
    snd_pcm_hw_params_any( handle, params );

    // set the values!
    snd_pcm_hw_params_set_channels(handle,params,format.channels());
    snd_pcm_hw_params_set_rate(handle,params,format.frequency(),dir);

    err = -1;

    switch(format.sampleSize()) {
        case 8:
            if(format.sampleType() == QAudioFormat::SignedInt)
                err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S8);
            else if(format.sampleType() == QAudioFormat::UnSignedInt)
                err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U8);
            break;
        case 16:
            if(format.sampleType() == QAudioFormat::SignedInt) {
                if(format.byteOrder() == QAudioFormat::LittleEndian)
                    err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S16_LE);
                else if(format.byteOrder() == QAudioFormat::BigEndian)
                    err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S16_BE);
            } else if(format.sampleType() == QAudioFormat::UnSignedInt) {
                if(format.byteOrder() == QAudioFormat::LittleEndian)
                    err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U16_LE);
                else if(format.byteOrder() == QAudioFormat::BigEndian)
                    err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U16_BE);
            }
            break;
        case 32:
            if(format.sampleType() == QAudioFormat::SignedInt) {
                if(format.byteOrder() == QAudioFormat::LittleEndian)
                    err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S32_LE);
                else if(format.byteOrder() == QAudioFormat::BigEndian)
                    err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S32_BE);
            } else if(format.sampleType() == QAudioFormat::UnSignedInt) {
                if(format.byteOrder() == QAudioFormat::LittleEndian)
                    err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U32_LE);
                else if(format.byteOrder() == QAudioFormat::BigEndian)
                    err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U32_BE);
            }
    }

    // For now, just accept only audio/pcm codec
    if(!format.codec().startsWith(QLatin1String("audio/pcm"))) {
        err=-1;
    } else
        testCodec = true;

    if(err>=0 && format.channels() != -1) {
        err = snd_pcm_hw_params_test_channels(handle,params,format.channels());
        if(err>=0)
            err = snd_pcm_hw_params_set_channels(handle,params,format.channels());
        if(err>=0)
            testChannel = true;
    }

    if(err>=0 && format.frequency() != -1) {
        err = snd_pcm_hw_params_test_rate(handle,params,format.frequency(),0);
        if(err>=0)
            err = snd_pcm_hw_params_set_rate(handle,params,format.frequency(),dir);
        if(err>=0)
            testFreq = true;
    }

    if((err>=0 && format.sampleSize() != -1) &&
            (format.sampleType() != QAudioFormat::Unknown)) {
        switch(format.sampleSize()) {
            case 8:
                if(format.sampleType() == QAudioFormat::SignedInt)
                    err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S8);
                else if(format.sampleType() == QAudioFormat::UnSignedInt)
                    err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U8);
                break;
            case 16:
                if(format.sampleType() == QAudioFormat::SignedInt) {
                    if(format.byteOrder() == QAudioFormat::LittleEndian)
                        err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S16_LE);
                    else if(format.byteOrder() == QAudioFormat::BigEndian)
                        err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S16_BE);
                } else if(format.sampleType() == QAudioFormat::UnSignedInt) {
                    if(format.byteOrder() == QAudioFormat::LittleEndian)
                        err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U16_LE);
                    else if(format.byteOrder() == QAudioFormat::BigEndian)
                        err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U16_BE);
                }
                break;
            case 32:
                if(format.sampleType() == QAudioFormat::SignedInt) {
                    if(format.byteOrder() == QAudioFormat::LittleEndian)
                        err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S32_LE);
                    else if(format.byteOrder() == QAudioFormat::BigEndian)
                        err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S32_BE);
                } else if(format.sampleType() == QAudioFormat::UnSignedInt) {
                    if(format.byteOrder() == QAudioFormat::LittleEndian)
                        err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U32_LE);
                    else if(format.byteOrder() == QAudioFormat::BigEndian)
                        err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U32_BE);
                }
        }
        if(err>=0) {
            testSize = true;
            testType = true;
        }
    }
    if(err>=0)
        err = snd_pcm_hw_params(handle, params);

    if(err == 0) {
        // settings work
        // close()
        if(handle)
            snd_pcm_close(handle);
        return true;
    }
    if(handle)
        snd_pcm_close(handle);

    return false;
}

testSettings() [2/2]

bool QAudioDeviceInfoInternal::testSettings

(

const QAudioFormat &

format

)

const

updateLists() [1/2]

void QAudioDeviceInfoInternal::updateLists

(

)

Definition at line 377 of file qaudiodeviceinfo_alsa_p.cpp.

Referenced by byteOrderList(), channelsList(), codecList(), frequencyList(), sampleSizeList(), and sampleTypeList().

{
    // redo all lists based on current settings
    freqz.clear();
    channelz.clear();
    sizez.clear();
    byteOrderz.clear();
    typez.clear();
    codecz.clear();

    if(!handle)
        open();

    if(!handle)
        return;

    for(int i=0; i<(int)MAX_SAMPLE_RATES; i++) {
        //if(snd_pcm_hw_params_test_rate(handle, params, SAMPLE_RATES[i], dir) == 0)
        freqz.append(SAMPLE_RATES[i]);
    }
    channelz.append(1);
    channelz.append(2);
#if (SND_LIB_MAJOR == 1 && SND_LIB_MINOR == 0 && SND_LIB_SUBMINOR >= 14)
    if (surround40) channelz.append(4);
    if (surround51) channelz.append(6);
    if (surround71) channelz.append(8);
#endif
    sizez.append(8);
    sizez.append(16);
    sizez.append(32);
    byteOrderz.append(QAudioFormat::LittleEndian);
    byteOrderz.append(QAudioFormat::BigEndian);
    typez.append(QAudioFormat::SignedInt);
    typez.append(QAudioFormat::UnSignedInt);
    typez.append(QAudioFormat::Float);
    codecz.append(QLatin1String("audio/pcm"));
    close();
}

updateLists() [2/2]

void QAudioDeviceInfoInternal::updateLists

(

)

Properties

byteOrderz

QList< QAudioFormat::Endian > QAudioDeviceInfoInternal::byteOrderz

private

Definition at line 114 of file qaudiodeviceinfo_alsa_p.h.

Referenced by byteOrderList(), and updateLists().

channelz

QList< int > QAudioDeviceInfoInternal::channelz

private

Definition at line 112 of file qaudiodeviceinfo_alsa_p.h.

Referenced by channelsList(), and updateLists().

codecz

QStringList QAudioDeviceInfoInternal::codecz

private

Definition at line 115 of file qaudiodeviceinfo_alsa_p.h.

Referenced by codecList(), and updateLists().

device

QString QAudioDeviceInfoInternal::device

private

Definition at line 108 of file qaudiodeviceinfo_alsa_p.h.

Referenced by deviceName(), get_device_info(), open(), QAudioDeviceInfoInternal(), and testSettings().

deviceId

AudioDeviceID QAudioDeviceInfoInternal::deviceId

Definition at line 68 of file qaudiodeviceinfo_mac_p.h.

Referenced by QAudioDeviceInfoInternal().

freqz

QList< int > QAudioDeviceInfoInternal::freqz

private

Definition at line 111 of file qaudiodeviceinfo_alsa_p.h.

Referenced by frequencyList(), and updateLists().

handle

snd_pcm_t* QAudioDeviceInfoInternal::handle

private

Definition at line 117 of file qaudiodeviceinfo_alsa_p.h.

Referenced by close(), open(), QAudioDeviceInfoInternal(), testSettings(), and updateLists().

mode

QAudio::Mode QAudioDeviceInfoInternal::mode

private

Definition at line 109 of file qaudiodeviceinfo_alsa_p.h.

Referenced by defaultOutputDevice(), get_device_info(), open(), preferredFormat(), QAudioDeviceInfoInternal(), and testSettings().

name

QString QAudioDeviceInfoInternal::name

Definition at line 69 of file qaudiodeviceinfo_mac_p.h.

Referenced by availableDevices(), defaultOutputDevice(), get_device_info(), open(), QAudioDeviceInfoInternal(), and testSettings().

nearest

QAudioFormat QAudioDeviceInfoInternal::nearest

private

Definition at line 110 of file qaudiodeviceinfo_alsa_p.h.

Referenced by preferredFormat().

params

snd_pcm_hw_params_t* QAudioDeviceInfoInternal::params

private

Definition at line 118 of file qaudiodeviceinfo_alsa_p.h.

Referenced by testSettings().

sizez

QList< int > QAudioDeviceInfoInternal::sizez

private

Definition at line 113 of file qaudiodeviceinfo_alsa_p.h.

Referenced by sampleSizeList(), and updateLists().

typez

QList< QAudioFormat::SampleType > QAudioDeviceInfoInternal::typez

private

Definition at line 116 of file qaudiodeviceinfo_alsa_p.h.

Referenced by sampleTypeList(), and updateLists().

---

The documentation for this class was generated from the following files:

• /src/multimedia/audio/qaudiodeviceinfo_alsa_p.h
• /src/multimedia/audio/qaudiodeviceinfo_mac_p.h
• /src/multimedia/audio/qaudiodeviceinfo_win32_p.h
• /src/multimedia/audio/qaudiodeviceinfo_alsa_p.cpp
• /src/multimedia/audio/qaudiodeviceinfo_mac_p.cpp
• /src/multimedia/audio/qaudiodeviceinfo_win32_p.cpp