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With the introduction of HEVC 444 support, we technically have two
codecs that can handle 444 - HEVC and MJPEG. In the case of MJPEG,
it can decode, but can only output one of the semi-planar formats.
That means we need additional logic to decide whether to use a
444 output format or not.
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For some odd reason, the Nvidia version macros puts the minor version in
the msb, so comparing against it is impossible.
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The 'simple' hwaccels (not h.264 and hevc) all use the same bitstream
management and reference lookup logic so let's refactor all that into
common functions.
I verified that casting a signed int -1 to unsigned char produces 255
according to the C language specification.
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Fixes fate-source.
Signed-off-by: James Almer <jamrial@gmail.com>
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Some parts of the code are based on a patch by
Timo Rothenpieler <timo@rothenpieler.org>
Merges Libav commit b9129ec4668c511e0a79e25c6f25d748cee172c9.
Due to the name clash with our cuvid decoder, rename it to nvdec.
This commit also changes the Libav code to dynamic loading of the
cuda/cuvid libraries.
Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>
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