The format-specific data, allocated and freed by libavutil along with
this context.
Should be cast by the user to the format-specific context defined in the
corresponding header (hwcontext_*.h) and filled as described in the
documentation before calling av_hwdevice_ctx_init().
After calling av_hwdevice_ctx_init() this struct should not be modified
by the caller.
The format-specific data, allocated and freed by libavutil along with this context.
Should be cast by the user to the format-specific context defined in the corresponding header (hwcontext_*.h) and filled as described in the documentation before calling av_hwdevice_ctx_init().
After calling av_hwdevice_ctx_init() this struct should not be modified by the caller.