Haihao Xiang e0bbdbe0a6 lavu/hwcontext_qsv: add loader field to AVQSVDeviceContext ...

In oneVPL, a valid mfxLoader handle is needed when creating mfx session
for decoding, encoding and processing[1], so add loader field to
AVQSVDeviceContext. User should fill this field before calling
av_hwdevice_ctx_init() if using oneVPL

This is in preparation for oneVPL support

[1]https://spec.oneapi.io/versions/latest/elements/oneVPL/source/programming_guide/VPL_prg_session.html#onevpl-dispatcher

2022-08-12 10:43:39 +08:00

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