The AudioDataOutput class provides access to audio data. More...
#include <Phonon>Inherits: QObject and MediaNode.
This class was introduced in Qt 4.7.
| enum | Channel { LeftChannel, RightChannel, CenterChannel, LeftSurroundChannel, RightSurroundChannel, SubwooferChannel } |
| int | dataSize () const |
| int | sampleRate () const |
| void | setDataSize ( int size ) |
| void | dataReady ( const QMap<Phonon::AudioDataOutput::Channel, QVector<qint16> > & data ) |
| void | endOfMedia ( int remainingSamples ) |
The AudioDataOutput class provides access to audio data.
This class is used to obtain audio data, typically for the purpose of visualizing it.
Although it is not designed for realtime performance, the latencies associated with accessing the data should be low enough for applications that provide visualizations of the data. This class can also be used to save the audio data for further processing.
This enum describes the channel audio data belongs to.
| Constant | Value |
|---|---|
| Phonon::AudioDataOutput::LeftChannel | 0 |
| Phonon::AudioDataOutput::RightChannel | 1 |
| Phonon::AudioDataOutput::CenterChannel | 2 |
| Phonon::AudioDataOutput::LeftSurroundChannel | 3 |
| Phonon::AudioDataOutput::RightSurroundChannel | 4 |
| Phonon::AudioDataOutput::SubwooferChannel | 5 |
This property holds the number of samples passed via the dataReady() signal.
Access functions:
| int | dataSize () const |
| void | setDataSize ( int size ) |
This signal is emitted whenever there is data available to read. The data sent by the signal is supplied in the form of a map that holds the data for different output channels.
This signal is emitted before the final dataReady() signal is emitted for a media. The remainingSamples value sent by the signal contains the number of samples that will be sent in the final dataReady() signal for the media.
Returns the sample rate measured in Hertz, as reported by the backend. If the backend is unavailable -1 is returned.