[FFmpeg-devel] [PATCH v2] swscale/output: Altivec-optimize yuv2plane1_8

[Lauri Kasanen]

> ./ffmpeg_g -f rawvideo -pix_fmt rgb24 -s hd1080 -i /dev/zero -pix_fmt yuv420p \
> -f null -vframes 100 -v error -nostats -
> 
> 1158 UNITS in planar1,   65528 runs,      8 skips
> 
> -cpuflags 0
> 
> 19082 UNITS in planar1,   65533 runs,      3 skips
> 
> 16.48 speedup ratio. On x86, SSE2 is ~7. Curiously, the Power C version
> takes as many cycles as the x86 SSE2 version, yikes it's fast.
> 
> Note that this function uses VSX instructions, but is not marked so.
> This is because several existing functions also make that mistake.
> I'll submit a patch moving them once this is reviewed.
> 
> v2: Remove !BE check
> Signed-off-by: Lauri Kasanen <cand at gmx.com>

Ping. Seems not many ffmpeg devs interested in ppc.

- Lauri