[MPlayer-dev-eng] yuv2yuv ??

[David Holm]

Ok, I see that there is a huge interest in this, what I would want is a 
fast (read c+mmx+...+sse2) implementation of this which would convert at 
least YV12 and YUY2 to planar YUV420 since that is the format of choice 
by ffmpeg AND most importantly, the format of choice for the dxr3. I'm 
not too good at this YUV format yet, 4 days ago in knew no more than 
that it was a way of storing pixels and quite frankly it is taking me 
quite a while to figure out how to do yuy2->yuv420p, I'll solve it soon 
though I hope ;).

Anyways, my next point is, libvo->query_format() should return a 
priority value instead of an integer interpreted as a boolean. For 
instance, since my dxr3 driver would at 1.st hand prefer MPEGPES and 
2:nd hand prefer YUV420P and so on input, why not make a system 
depending on priorities instead of just booleans?
Also, MPlayer should be able to figure out by itself that when a libvo 
supports (say) YV12 input only it should default to the odivx codec, 
instead of just defaulting to divxds and then telling me the format is 
unsupported.

//David Holm

P.S. why not a (example) yuv2yuv((bool)planar/packed, 
y;vertical:horizontal, u;vertical:horizontal...(IMGPXL_*)outfmt, 
void*dst, int dst_size) letting the yuv2yuv malloc dst. Instead of just 
creating a million yuy2toyuv420 rgb24tobgr32 uyvy2yv12 and so on and so 
forth... D.S.

Arpi wrote:

>Hi,
>
>>On Friday, 2. November 2001 21:31, you wrote:
>>
>>>Hi,
>>>is there a fast, working yuv2yuv function in mplayer?
>>>
>>no.
>>
>>>If not, can anyone tell me where to find one?
>>>
>>dunno, but maybe Michael or Nick will write one.
>>
>>Btw. I'd also like an optimized YV12->YUY2 code so I can send it to savage 
>>driver maintainer to speed up decoding on savage :) (it currently does slow C 
>>conversion in driver from anyYUV->YUY2).
>>
>
>we need it anyway for mencoder, as win32 codecs in/out yuy2 while others yv12
>
>and what about a fast bgr24 -> yuy2 ? usefull for codecs with no yuv support.
>
>
>A'rpi / Astral & ESP-team
>
>--
>mailto:arpi at thot.banki.hu
>http://esp-team.scene.hu
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