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Commit Graph

3 Commits (f7ddf4fc57cbbe5c40e3a28e23e9d8a6d66d3cd0)

Author	SHA1	Message	Date
Lynne	675bb1f4f9	diracdec: rewrite golomb reader ... This version is able to output multiple coefficients at a time and is able to altogether remove actual golomb code parsing. Its also able to partially recover the last coefficient in case the packet is incomplete. Total decoder performance gain for 8bit 420 1080p lossless: 40%. Total decoder performance gain for 10bit 420 1080p lossless: 40%. clang was able to vectorize the loop much better than my handwritten assembly, but gcc was very naive and didn't. Lookup table is a rewritten version of vc2hqdecode.	5 years ago
Michael Niedermayer	2408f92678	avcodec/dirac_vlc: Fix avutil.h include ... Reviewed-by: Rostislav Pehlivanov <atomnuker@gmail.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>	9 years ago
Rostislav Pehlivanov	0eb0f93109	diracdec: implement a LUT-based Golomb code parser ... Still much left to optimize, but it provides a significant performance improvement - 10% for 300Mbps (1080p30), 25% for 1.5Gbps (4k 60fps) in comparison with the default implementation. Signed-off-by: Rostislav Pehlivanov <rpehlivanov@obe.tv>	9 years ago