[FFmpeg-devel] yuv420_bgr24_mmxext conversion taking significant time

[Adrian Tong]

On Sat, 8 Jun 2019 at 09:42, Adrian Tong <adriantong1024 at gmail.com> wrote:

>
>
> On Sat, 8 Jun 2019 at 09:38, Lauri Kasanen <cand at gmx.com> wrote:
>
>> On Sat, 8 Jun 2019 06:51:51 -0700
>> Adrian Tong <adriantong1024 at gmail.com> wrote:
>>
>> > Hi Lauri.
>> >
>> > Thanks for the reply, any reason why this has not been implemented
>> before ?
>> > it seems to me that this would be a pretty important/hot function.
>>
>> Just the usual, nobody has had the interest. There are other places too
>> where the only x86 accel is mmx.
>>
>> - Lauri
>>
>
> I see. Thank you. I will see what I can do.
> -Adrian
>

I have been trying to implement yuv420_to_bgr24 using SSE2 instruction. I
ran into the case where the output of C implemented yuv420_to_bgr24 has
slightly different resulting bgr24 image from MMX implemented
yuv420_to_bgr24. Is this expected behavior ?

Thanks
-Adrian

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