The QAbstractAudioOutput class is a base class for audio backends. More...
Header: | #include <QAbstractAudioOutput> |
qmake: | QT += multimedia |
Inherits: | QObject |
virtual int | bufferSize() const = 0 |
virtual int | bytesFree() const = 0 |
virtual QString | category() const |
virtual qint64 | elapsedUSecs() const = 0 |
virtual QAudio::Error | error() const = 0 |
virtual QAudioFormat | format() const = 0 |
virtual int | notifyInterval() const = 0 |
virtual int | periodSize() const = 0 |
virtual qint64 | processedUSecs() const = 0 |
virtual void | reset() = 0 |
virtual void | resume() = 0 |
virtual void | setBufferSize(int value) = 0 |
virtual void | setCategory(const QString &) |
virtual void | setFormat(const QAudioFormat &fmt) = 0 |
virtual void | setNotifyInterval(int ms) = 0 |
virtual void | setVolume(qreal volume) |
virtual void | start(QIODevice *device) = 0 |
virtual QIODevice * | start() = 0 |
virtual QAudio::State | state() const = 0 |
virtual void | stop() = 0 |
virtual void | suspend() = 0 |
virtual qreal | volume() const |
void | errorChanged(QAudio::Error error) |
void | notify() |
void | stateChanged(QAudio::State state) |
The QAbstractAudioOutput class is a base class for audio backends.
QAbstractAudioOutput implements audio functionality for QAudioOutput, i.e., QAudioOutput routes function calls to QAbstractAudioOutput. For a description of the functionality that is implemented, see the QAudioOutput class and function descriptions.
See also QAudioOutput.
[pure virtual]
int QAbstractAudioOutput::bufferSize() constReturns the audio buffer size in bytes.
See also setBufferSize().
[pure virtual]
int QAbstractAudioOutput::bytesFree() constReturns the free space available in bytes in the audio buffer.
[virtual]
QString QAbstractAudioOutput::category() constSee also setCategory().
[pure virtual]
qint64 QAbstractAudioOutput::elapsedUSecs() constReturns the milliseconds since start() was called, including time in Idle and suspend states.
[pure virtual]
QAudio::Error QAbstractAudioOutput::error() constReturns the error state.
[signal]
void QAbstractAudioOutput::errorChanged(QAudio::Error error)This signal is emitted when the error state has changed.
[pure virtual]
QAudioFormat QAbstractAudioOutput::format()
constReturns the QAudioFormat being used.
See also setFormat().
[signal]
void QAbstractAudioOutput::notify()This signal is emitted when x ms of audio data has been processed the interval set by setNotifyInterval(x).
[pure virtual]
int QAbstractAudioOutput::notifyInterval() constReturns the notify interval in milliseconds.
See also setNotifyInterval().
[pure virtual]
int QAbstractAudioOutput::periodSize() constReturns the period size in bytes.
[pure virtual]
qint64 QAbstractAudioOutput::processedUSecs() constReturns the amount of audio data processed since start() was called in milliseconds.
[pure virtual]
void QAbstractAudioOutput::reset()Drops all audio data in the buffers, resets buffers to zero.
[pure virtual]
void QAbstractAudioOutput::resume()Resumes processing audio data after a suspend()
[pure virtual]
void QAbstractAudioOutput::setBufferSize(int value)Sets the audio buffer size to value in bytes.
See also bufferSize().
[virtual]
void QAbstractAudioOutput::setCategory(const QString &)See also category().
[pure virtual]
void QAbstractAudioOutput::setFormat(const QAudioFormat &fmt)Set the QAudioFormat to use to fmt. Setting the format is only allowable while in QAudio::StoppedState.
See also format().
[pure virtual]
void QAbstractAudioOutput::setNotifyInterval(int ms)Sets the interval for notify() signal to be emitted. This is based on the ms of audio data processed not on actual real-time. The resolution of the timer is platform specific.
See also notifyInterval().
[virtual]
void QAbstractAudioOutput::setVolume(qreal volume)Sets the volume. Where volume is between 0.0 and 1.0.
See also volume().
[pure virtual]
void QAbstractAudioOutput::start(QIODevice *device)Uses the device as the QIODevice to transfer data.
[pure virtual]
QIODevice *QAbstractAudioOutput::start()Returns a pointer to the QIODevice being used to handle the data transfer. This QIODevice can be used to write() audio data directly.
[pure virtual]
QAudio::State QAbstractAudioOutput::state() constReturns the state of audio processing.
[signal]
void QAbstractAudioOutput::stateChanged(QAudio::State state)This signal is emitted when the device state has changed.
[pure virtual]
void QAbstractAudioOutput::stop()Stops the audio output.
[pure virtual]
void QAbstractAudioOutput::suspend()Stops processing audio data, preserving buffered audio data.
[virtual]
qreal QAbstractAudioOutput::volume()
constReturns the volume in the range 0.0 and 1.0.
See also setVolume().