[FFmpeg-devel] [PATCH][RFC] JPEG2000: SSE optimisation for DWT decoding
Carl Eugen Hoyos
ceffmpeg at gmail.com
Fri Jul 21 00:43:48 EEST 2017
2017-07-20 18:07 GMT+02:00 maxime taisant <maximetaisant at hotmail.fr>:
> From: Maxime Taisant <maximetaisant at hotmail.fr>
> I am currently working on SSE optimisations for the dwt functions used to decode JPEG2000.
> For the moment, I have only managed to produce a SSE-optimized version of the sr_1d97_float function
> (with relatively good results).
Please add some numbers.
> + if (ARCH_X86)
> + ff_sr_1d97_float_sse(line, mh, mh + lh);
> + else
> + sr_1d97_float(line, mh, mh + lh);
This is not correct, look at ff_jpeg2000dsp_init_x86() and Jpeg2000DSPContext
to see what has to be done.
Others will comment on the asm code.
Thank you, Carl Eugen
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