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The API covers a relatively rare use case, and is far from
ideal, as it doesn't cooperate very well with HW accerlerated
rendering.
Since QVideoFrame and the QML VideoOutput item offer the option to
get a texture for the frame, it's probably better to use that
as the basis for further processing.
Change-Id: I89deb915f660312fb3a83b066a5371f5454346da
Reviewed-by: Doris Verria <doris.verria@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
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The non-OS X path also uses clGetGLContextInfoKHR when available,
instead of just blindly taking the first GPU device for the platform.
This way we get the correct OpenCL device in case the application is using an
OpenGL context on the same vendor's second GPU.
On Windows desktop OpenGL is now correctly forced and therefore there is
no need to waste time on runtime checks for ANGLE later on.
Remove the hard-coded custom pathes from the .pro file.
Also fixes error reporting on the OS X specific path.
Change-Id: I8d6ab867510d113d5135b61e66822381e81c995a
Reviewed-by: Yoann Lopes <yoann.lopes@theqtcompany.com>
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Change-Id: I1ea91f93677c53322c3867db6069e4362c58cebd
Reviewed-by: Yoann Lopes <yoann.lopes@theqtcompany.com>
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Add the QAbstractVideoFilter base class and integrate it with VideoOutput.
This can be used to perform arbitrary filtering or image processing
on the frames of a video stream of a VideoOutput element right before
the OpenGL texture is provided to the scenegraph by the video node.
This opens up the possibility to integrate computer vision
frameworks or accelerated image processing with Qt Quick applications
that display video streams using Qt Multimedia.
Conceptually it is somewhat similar to QVideoProbe, this
approach however allows modifying the frame, in real time
with tight integration to the scenegraph node, and targets
Qt Quick meaning setting up the filter and processing the results
of the computations happen completely in QML.
[ChangeLog] Added QAbstractVideoFilter that serves as a base class for QML
video filtering elements that integrate compute, vision, and image processing
frameworks with VideoOutput.
Change-Id: Ice1483f8c2daec5a43536978627a7bbb64549480
Reviewed-by: Yoann Lopes <yoann.lopes@theqtcompany.com>
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