[FFmpeg-devel] [PATCH]levc/hevc_cabac Optimise ff_hevc_hls_residual_coding (especially ARM)

John Cox jc at kynesim.co.uk
Wed Jan 20 18:01:21 CET 2016

On Wed, 20 Jan 2016 13:26:05 +0100, you wrote:

>2016-01-19 13:46 GMT+01:00 John Cox <jc at kynesim.co.uk>:
>> I've just done a fair bit of work on hevc_cabac decode for the Rasberry
>> Pi2 and I think that the patch is generally applicable.  Patch is
>> attached but you may prefer to take it from git:
>This work is certainly impressive, and most people would have come
>only with some of the "tricks" you used.
>Although it already represents quite a bit of work, I echo others'
>suggestions to have more incremental changes.
>> I have not yet run fate over it as I haven't yet finished downloading
>> the samples (the internet connection here isn't wildly fast), but I have
>> run it against the H265.1 conformance streams on both x86 and ARM and it
>> causes no regressions.
>Your patch fails on the later fate tests linked to range extensions
>(RExt sequences) on Win64. I didn't investigate why. Random thoughts:
>transform_skip, cross-channel residual, some bypass-coded elements (eg

Thanks for that - bug in my persistent rice processing.  Apparently
untested by the main conformance suite.  Code now passes fate (x86




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