[FFmpeg-soc] BFI

[Mike Melanson]

Sisir Koppaka wrote:
> In the BFI wiki page (http://wiki.multimedia.cx/index.php?title=BFI):
> 
> bytes 52-55    ( +34) first used palette entry index
>  bytes 56-59    ( +38) number of used palette entries
>  bytes 60-827   ( +3C) 256 RGB triplets (6-bit VGA palette values)
> 
> To set the palette, I'm currently running av_get_packet after setting the
> pointer to 60 and setting the stream_index to 0 which is what my video uses.
> 
> I) have some confusion with bytes 52-55 and 56-59 - what do they do and how
> should I handle them?

Weird. I just reviewed the spec and examined 2287.bfi. It doesn't make
much sense to specify beginning and ending palette indices when you are
transporting the whole 256-color palette anyway. Maybe they are just
advisory.

> 2)Am I right in setting the pointer to 60 before calling av_get_packet or
> should I set it to 52 or 56?

Offset 60. You want the 256 RGB triplets.

-- 
	-Mike Melanson