Hi,

It was a long time ago that I wrote something about the latest gmerlin
developments. The reason for that is, that most of the time I was too busy
coding and too lazy for documenting stuff. For the latter you need a
stable
architecture and the architecture changes a bit during the development. I
usually think a lot before starting coding. But at some point I need to
flush my brain and fine tune things later when I have some working
applications.

The gmerlin architecture was reworked dramatically with the following goals:

1. Implement generic source and sink connectors for transporting A/V frames
   and (compressed) packets inside one application. These do automatic
   format conversion and optimized buffer handling.

2. Change the handling of A/V streams throughout all libraries to use the
   new connectors. This includes gmerlin-avdecoder as well as the gmerlin
   plugin API.

3. Implement standalone codec plugins for on-the-fly (de-)compression of
   A/V streams.

4. Define (yet another) Multimedia container format. It can be used as an
   on-disk format but also (and more importantly) as a generic pipe format
   for connecting commandline applications. Think of it as a more generic
   version of the yuv4mpeg format. It is called gavf.

5. Define an interprocess transport mechanism for gavf streams through
   pipes or sockets. On machine local connections it can pass A/V frames
   through shared memory for increased efficiency.

6. Write a bunch of commandline tools for generating and processing gavf
   streams, which can be connected in every imaginable way on the Unix
   commandline. This was the ultimate goal I had in my mind :)

Not everything is finished yet. I'll document each of these subprojects in
separate posts.

Burkhard


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