MFXEnumImplementations expects the adapter index to be within a range of
valid Intel adapters produced by MFXLoad and the config filter. If a
system has one non-Intel high performance GPU and one Intel iGPU, OBS
and the test app will see the Intel iGPU as index 1 due to high
performance hints, but MFXEnumImplementations will expect only one valid
index, 0. In this scenario, passing a value of 1 to
MFXEnumImplementations will cause it to abort and return
MFX_ERR_NOT_FOUND (Provided index is out of possible range). This causes
subsequent capabilities testing to fail.
To avoid this, let's track how many non-Intel adapters we see and
subtract that number from adapterIdx to only pass valid index to
MFXEnumImplementations.
On systems with multiple graphics adapters, one card can be configured
as power saving, and another card can be configured as performance.
Sometimes, OBS and the encoder test subprocesses will not be configured
the same way, so it's necessary to provide adapter order to the encoder
test subprocesses.
This change ensures the adapter order by passing the LUIDs to the test
subprocesses. The adapter indexes will then be updated accordingly.
When this detection helper was originally written, it incorrectly set
the hardware implementation value. This fixes it to use the correct one
based upon the index.
This simplifies encoder initialization and prevents it from requiring
any sort of unnecessary Direct3D or encoder initiazation tests while OBS
is actually running.
