内容

• 公共类型
• 特性
• 公共函数
• 公共槽
• 信号
• 详细描述

AudioDataOutput Class

( Phonon::AudioDataOutput )

The AudioDataOutput class provides access to audio data. 更多...

Since:	Qt 4.7
继承：	QObject and MediaNode

• 所有成员列表，包括继承成员

公共类型

enum	Channel { LeftChannel, RightChannel, CenterChannel, LeftSurroundChannel, RightSurroundChannel, SubwooferChannel }

特性

• dataSize : int

• 1 特性继承自 QObject

公共函数

int	dataSize () const
int	sampleRate () const

• 29 公共函数继承自 QObject
• 3 公共函数继承自 Phonon::MediaNode

公共槽

void	setDataSize (int size )

• 1 公共槽继承自 QObject

信号

void	dataReady (const QMap<Phonon::AudioDataOutput::Channel, QVector<qint16> > & data )
void	endOfMedia (int remainingSamples )

• 1 信号继承自 QObject

额外继承成员

• 7 静态公共成员继承自 QObject
• 8 保护函数继承自 QObject

详细描述

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.

成员类型文档编制

enum AudioDataOutput:: Channel

This enum describes the channel audio data belongs to.

常量	值
Phonon::AudioDataOutput::LeftChannel	0
Phonon::AudioDataOutput::RightChannel	1
Phonon::AudioDataOutput::CenterChannel	2
Phonon::AudioDataOutput::LeftSurroundChannel	3
Phonon::AudioDataOutput::RightSurroundChannel	4
Phonon::AudioDataOutput::SubwooferChannel	5

特性文档编制

dataSize : int

This property holds the number of samples passed via the dataReady() signal.

访问函数：

int	dataSize () const
void	setDataSize (int size )

成员函数文档编制

[signal] void AudioDataOutput:: dataReady (const QMap < Phonon::AudioDataOutput::Channel , QVector < qint16 > > & data )

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.

[signal] void AudioDataOutput:: endOfMedia ( int remainingSamples )

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.

int AudioDataOutput:: sampleRate () const

Returns the sample rate measured in Hertz, as reported by the backend. If the backend is unavailable -1 is returned.