QAbstractAudioOutput Class
The QAbstractAudioOutput class is a base class for audio backends. More...
Header: | #include <QAbstractAudioOutput> |
qmake: | QT += multimedia |
Inherits: | QObject |
Public Functions
virtual int | bufferSize() const = 0 |
virtual int | bytesFree() const = 0 |
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 | 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 |
Signals
void | errorChanged(QAudio::Error error) |
void | notify() |
void | stateChanged(QAudio::State state) |
Detailed Description
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.
Member Function Documentation
[signal]
void QAbstractAudioOutput::errorChanged(QAudio::Error error)
This signal is emitted when the error state has changed.
[signal]
void QAbstractAudioOutput::notify()
This signal is emitted when x ms of audio data has been processed the interval set by setNotifyInterval(x).
[signal]
void QAbstractAudioOutput::stateChanged(QAudio::State state)
This signal is emitted when the device state has changed.
[pure virtual]
int QAbstractAudioOutput::bufferSize() const
Returns the audio buffer size in bytes.
See also setBufferSize().
[pure virtual]
int QAbstractAudioOutput::bytesFree() const
Returns the free space available in bytes in the audio buffer.
[pure virtual]
qint64 QAbstractAudioOutput::elapsedUSecs() const
Returns the milliseconds since start() was called, including time in Idle and suspend states.
[pure virtual]
QAudio::Error QAbstractAudioOutput::error() const
Returns the error state.
[pure virtual]
QAudioFormat QAbstractAudioOutput::format() const
Returns the QAudioFormat being used.
See also setFormat().
[pure virtual]
int QAbstractAudioOutput::notifyInterval() const
Returns the notify interval in milliseconds.
See also setNotifyInterval().
[pure virtual]
int QAbstractAudioOutput::periodSize() const
Returns the period size in bytes.
[pure virtual]
qint64 QAbstractAudioOutput::processedUSecs() const
Returns 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().
[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() const
Returns the state of audio processing.
[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() const
Returns the volume in the range 0.0 and 1.0.
See also setVolume().
© 2024 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.