Convert input frames to float on GPU #300
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Signed-off-by: Yondon Fu <yondon.fu@gmail.com>
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This should have a very small perf boost of shaving off maybe a few ms per frame when processing input video by making sure that float conversion of frames happens on GPU instead of CPU. The boost isn't that noticeable, but including this change to maintain the practice of keeping as much as possible on the GPU to avoid stray lines of code that needlessly perform compute on CPU.