An issue can be seen when using msdkh265enc with bitrate change in
playing state. The root cause is the corresponding plugin is loaded
again.
Returning MFX_ERR_UNDEFINED_BEHAVIOR from MSDK just means the plugin has
been loaded, so we may ignore this error when doing configuation again
in the sub class, otherwise the pipeline will be interrupted
Add new macro for sink/src pad template to ensure no DMABuf caps
features are exposed on Windows. Some DMABuf caps features
were not handled by the commit 9ec62418c3
Sometimes a HEVC/H265 stream doesn't have a valid profile but MSDK can
handle this stream. Like vaapih265dec, msdkh265dec may advertise the sink
caps without profile
CodecProfile will be set in MFXVideoDECODE_DecodeHeader() to match
the input stream. Setting the hard-coded profile here will mislead
user that msdkh265dec supports a special profile only.
Makes GstMsdkContext to be a descendant of GstObject so that
we could track the life-cycle of the session of the driver.
Also replaces MsdkContext with this one.
Keeps msdk_d3d.c alive for the future.
https://bugzilla.gnome.org/show_bug.cgi?id=790752
