[Mplayer-cvslog] CVS: main/DOCS/tech mpcf.txt,1.30,1.31

[Michael Niedermayer]

Hi

On Friday 12 September 2003 00:00, Alex Beregszaszi wrote:
> Hi,
>
> > > And imho let first discuss the ordering and such, before applying.
> >
> > ok, more discussions:
> > change fourcc from b type (variable length string/binary) to f(32) (32
> > bit)?
>
> Imho the variable len b-type is better for the fourcc field.
> So you can have 2 (audio) and 4 byte (video) fccs (and later others)
agree

>
> Btw, one new idea!
> Current:
> stream_header:
> ...
> stream_id v
> stream_class v
> ...
>
> Proposed:
> ...
> stream_id f(16)
> ...
>
> 4 bits for stream_class (that means 16 diff. values)
> 12 bits for stream_id (that means 4096 diff. values)
>
> _or_
>
> 3 bits for class ? (8 diff)
> 5 bits for id ? (32 diff)
>
> That would mean 2 bytes instead the current 4 bytes.
ehh?
if the value is < 128 then v needs 1 byte, so its 2 bytes for stream_id & 
stream_class together not 4 ...

[...]
-- 
Michael
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