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About Full Motion Video and YUV->RGB
#228501 - 07/29/10 01:55 AM
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Hi,
I'm currently working on some arcade music boards, with MPEG-1 full motion video, and Sprites Overlay Layer.
These boards, their Sprite layer also uses YUV format palette. I believe they use some analogue circuits to output RGB signal.
In MAME, is it possible to define YUV format Palette-bitmap, and use modern VGA card's hardware color-space converting?
Another, is there any ready-made MPEG decoding code, which can be integreted into MAME?
Thanks 
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| R. Belmont |
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Cuckoo for IGAvania
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Reged: 09/21/03
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Re: About Full Motion Video and YUV->RGB
[Re: Naibo]
#230189 - 08/18/10 05:15 PM
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> In MAME, is it possible to define YUV format Palette-bitmap, and use modern VGA
> card's hardware color-space converting?
MAME can output YUV surfaces to the OSD layer for possible hardware conversion, but it requires that *all* of the game's graphics be YUV and I'm not sure if it's possible for a driver to specify at the moment. Modern GPUs actually have dropped dedicated YUV conversion hardware, by the way. The modern method is to use a pixel shader, although neither OSD layer does so at the moment. (I'm hoping to get SDL OSD doing it soon, as it will be a decent speedup for laserdisc games).
> Another, is there any ready-made MPEG decoding code, which can be integreted into
> MAME?
No, and you need to be *very* careful here. Only MPEG-1 video with layer 1 or 2 audio is now free from patents (and the devs are likely to be nervous about even that). You must not include layer 3 audio decoding (aka MP3 audio, which is patented until at least 2016).
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