QAudioProbe Class
The QAudioProbe class allows you to monitor audio being played or recorded. 更多...
头文件: | #include <QAudioProbe> |
qmake: | QT += multimedia |
基类: | QObject |
公有函数
QAudioProbe(QObject *parent = Q_NULLPTR) | |
~QAudioProbe() | |
bool | isActive() const |
bool | setSource(QMediaObject *source) |
bool | setSource(QMediaRecorder *mediaRecorder) |
- 32 个公有函数继承自 QObject
信号
void | audioBufferProbed(const QAudioBuffer &buffer) |
void | flush() |
- 2 个信号继承自 QObject
其他继承的成员
- 1 个属性继承自 QObject
- 1 个公有槽函数继承自 QObject
- 1 个公有变量继承自 QObject
- 10 个静态公有成员继承自 QObject
- 9 个受保护的函数继承自 QObject
- 2 个受保护的变量继承自 QObject
详细描述
The QAudioProbe class allows you to monitor audio being played or recorded.
QAudioRecorder *recorder = new QAudioRecorder(); QAudioProbe *probe = new QAudioProbe; // ... configure the audio recorder (skipped) connect(probe, SIGNAL(audioBufferProbed(QAudioBuffer)), this, SLOT(processBuffer(QAudioBuffer))); probe->setSource(recorder); // Returns true, hopefully. recorder->record(); // Now we can do things like calculating levels or performing an FFT
参见 QVideoProbe, QMediaPlayer, and QCamera.
成员函数
QAudioProbe::QAudioProbe(QObject *parent = Q_NULLPTR)
Creates a new QAudioProbe class with a parent. After setting the source to monitor with setSource(), the audioBufferProbed() signal will be emitted when audio buffers are flowing in the source media object.
QAudioProbe::~QAudioProbe()
Destroys this probe and disconnects from any media object.
[signal]
void QAudioProbe::audioBufferProbed(const QAudioBuffer &buffer)
This signal should be emitted when an audio buffer is processed in the media service.
[signal]
void QAudioProbe::flush()
This signal should be emitted when it is required to release all buffers. Application must release all outstanding references to audio buffers.
bool QAudioProbe::isActive() const
Returns true if this probe is monitoring something, or false otherwise.
The source being monitored does not need to be active.
bool QAudioProbe::setSource(QMediaObject *source)
Sets the media object to monitor to source.
If source is zero, this probe will be deactivated and this function wil return true.
If the media object does not support monitoring audio, this function will return false.
The previous object will no longer be monitored. Passing in the same object will be ignored, but monitoring will continue.
bool QAudioProbe::setSource(QMediaRecorder *mediaRecorder)
Starts monitoring the given mediaRecorder.
Returns true on success.
If there is no mediaObject associated with mediaRecorder, or if it is zero, this probe will be deactivated and this function wil return true.
If the media recorder instance does not support monitoring audio, this function will return false.
Any previously monitored objects will no longer be monitored. Passing in the same (valid) object will be ignored, but monitoring will continue.