Philip Langdale 52d8f35b14 avutil/hcontext_cuda: Remove unnecessary stream synchronisation ...

Similarly to the previous changes, we don't need to synchronise
after a memcpy to device memory. On the other hand, we need to
keep synchronising after a copy to host memory, otherwise there's
no guarantee that subsequent host reads will return valid data.

2019-03-30 10:56:49 -07:00

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