overlay PIP in winuae 4.2.0 frogger and moovid

[Toni Wilen]

It is pure software YUV to RGB conversion (=each pixel requires few multiplications and other basic arithmetic) + transparency check + scaling implementation. It is not going to be fast.

SVGA chip does this in real word for free.

[Mrz]

Originally Posted by AMIGASYSTEM

I do not find differences, the speeds are similar between PiP and Normal

speeds are not similar, PIP is 10x slower
ie try to load in frogger a divx video 640x480 and you will see

[Mrz]

Originally Posted by Toni Wilen

It is pure software YUV to RGB conversion (=each pixel requires few multiplications and other basic arithmetic) + transparency check + scaling implementation. It is not going to be fast.

SVGA chip does this in real word for free.

ah okI understand now why is slow
anyways
is possible that you implement PIP in winuae using the PC' gfx card hardware?

[Toni Wilen]

Totally not worth the trouble for something as pointless as playing videos in emulation. Perhaps some simple optimizations are possible but performance is rarely my goal when doing something that works much better without using emulation...

Use native video players if you want max performance. (or buy a faster PC This is probably yet another case where CPU cache size and memory bandwidth makes huge difference.)

[Toni Wilen]

Some optimizations done. Only do YUV to RGB conversion when YUV source value changes. This should improve performance especially when using large horizontal scaling factors.

[AMIGASYSTEM]

Originally Posted by Mrz

speeds are not similar, PIP is 10x slower
ie try to load in frogger a divx video 640x480 and you will see

See Video attachment, Video 640x480 play with Frogger PiP, Frogger Normal, FFPlay Normal

I have an old Dual-Core PC

http://eab.abime.net/zone/Test-PiP.avi