vaapipostproc + (brightness|saturation|contrast) + huge memory leak

[Timtchenko, Michael]

Hi all,
i'm currently facing a very strange behaviour within the gstreamer module vaapipostproc in version 1.16.2. I'm using this module for postprocessing of my video stream. Especially for adjustment of brightness, saturation and contrast, by changing the modules properties.
The decoding of the stream with vaapi, as well as the gl-texture-upload by glupload works like a charm. But when the stream is running and I'm trying to change the properties for brightness, saturation or contrast many times (in a calibration manner), I'm running out of memory.
Is it possible that there is a huge memory leak? When I'm steadily  calibrating the mentioned properties for about 30 secs, I get an increase of memory about 2 GB. (I know from 14.4.4, that there were some issues related to a mutual exclusive color calibration, which were fixed by a patch.)
Could someone verify this issue?
Below I've attached the relevant code sequences:
Construction:
...
    auto postproc = gst_element_factory_make( "vaapipostproc", "postproc" );
    auto upload = gst_element_factory_make( "glupload", "upload" );
    GstCaps* caps = gst_caps_from_string( "video/x-raw(memory:DMABuf), format=RGBA" );
    if( !gst_element_link_filtered( postproc, upload, caps ) )
...
Setter for Properties (the lines below are executed very often, while stream is running):
...
gfloat tmp = 0.5
g_object_set( G_OBJECT( vaapipostproc ), "brightness", tmp, NULL );
...
Not sure whether i'm doing wrong, or there is sth broken in vaapipostproc.
Kind regards
Michael






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