Details
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Bug
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Resolution: Invalid
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P3: Somewhat important
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None
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5.15.0 RC2
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None
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Ubuntu18.04，Virtual Box
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Linux/X11
Description
In the demo camera provided by QT ，i add the following code int the last of setCamera function:
QList<QCameraViewfinderSettings> settings = m_camera->supportedViewfinderSettings(); qDebug() << "Settings size is " << settings.size();
in Windows system，i can get some value of list，but in Linux ，i get nothing, the return list size is 0.
Through debugging source code，i found a very strange problem，the following code is in the camerabinsession.cpp file of Multimedia module, function name is supportedViewfinderSettings，i add the debug infomation：
QList<QCameraViewfinderSettings> CameraBinSession::supportedViewfinderSettings() const { qDebug() << "m_status = " << m_status; qDebug() << "m_status >= QCamera::LoadedStatus result is " << (m_status >= QCamera::LoadedStatus); if (m_status >= QCamera::LoadedStatus && m_supportedViewfinderSettings.isEmpty()) { m_supportedViewfinderSettings = capsToViewfinderSettings(supportedCaps(QCamera::CaptureViewfinder)); } return m_supportedViewfinderSettings; }
The final result is as follows：
m_status = QCamera::LoadingStatus
m_status >= QCamera::LoadedStatus result is false
why m_status value is QCamera::LoadingStatus，but the judgment that (m_status >= QCamera::LoadedStatus) return false ？This result in the return value is always none if the m_supportedViewfinderSettings list is empty