[Ffmpeg-devel] [PATCH] cook compatible decoder

Rich Felker dalias
Tue Nov 8 16:27:48 CET 2005

On Tue, Nov 08, 2005 at 08:08:13AM +0100, Benjamin Larsson wrote:
> Michael Niedermayer wrote:
> >Hi
> >
> >On Sun, Nov 06, 2005 at 11:23:47PM +0100, Benjamin Larsson wrote:
> >  
> >
> >> [...]
> >>
> >>
> >>The extradata handling has not been changed. The rm containter and codecs
> >>are not easy separated.
> >>    
> >>
> >
> >what exactly is the problem here? except the byte order of extradata, which 
> >seems a trivial thing to fix, just store the stuff in big endian order
> >instead of native or always little endian if you prefer
> >
> >[...]
> >  
> >
> The real problem is the way cook is stored in rm. They store subpackets
> out of order. Realplayer reorders the subpackets in the demuxer. I
> did the reordering in the codec to simplify the demuxer layer. But to be
> able to know how to reorder I need 2 variables from the ra header. Those
> variables are added to the extradata and passed to the decoder. Currently
> 5 extra variables are passed, it could be reduced to 2 but it doesn't solve
> the problem of being able to mux cook into something else without
> cook specific code in the (de)muxer, if the codec reorders the subpackets.
> We could do it the way Realplayer does it, then we would only pass real
> extradata and let the demuxer reorder the subpackets. This way it might
> be possible to mux into another container without cook specific code.
> The rm demuxer would need a rewrite for it to work though.

The demuxer must do the reordering, because the objects sent to the
decoder should be complete frames, not butchered container format
specific packets..


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