[MPlayer-dev-eng] RealPlayer codec support

[Florian Schneider]

Hi.

I am currently working on RealPlay codec support, i.e. using the
closed source codecs to decode video and audio.

The current status is:

- only video for RV30 is implemented right now
- the extended streaming header is (I hope) completely understood
  and implemented. RV30 implemented a new layer below the normal
  packets inside the video stream, which i call subpackets. a packet
  may contain multiple sub packets, and a data block (the one that will
  be copied to memory) may be spread over several (sub) packets.
- I have written some wrapper programs for logging the communication
  between player and codec.
- video decoding for RV30 has been implemented
- unfortunately the decoded data seems to be incorrect: even though the
  input to the RV20toYUV420Transform() and the other functions seem to
  be identical, the output differs, resulting in an ugly video output.
- for video decoding we only use drv[23].so.6.0, the rv[23]0.so.6.0
  is just for demuxing (as far as I understand)
- the audio codec is half way understood, but should be easier to finish
  than the video part - do we only need cook.so.6.0?
- the case differentiation in the demuxer is somewhat ugly at the moment

At the moment I am writing down all the documentation I have on paper,
so I can send the patch tomorrow. I don't think it will be ready for CVS,
but hopefully some people are interested. Since RV20 has the same interface,
it should be possible to support it, too.

Regards

Flo