[libdv-dev] dv_cleanup

[<pl...@ip...>]

Hi all,

I discovered, that dv_cleanup(void) frees all statically allocated memory=
.
The problem is, that the right time for calling this function cannot be
determined, if we have a modular program (e.g. which does en- and decodin=
g
in multiple threads).

Reference counting isn't always possible, since plugin based apps don't
even know, if libdv is used by some plugin or not.

Possible solutions are:

- Include a reference counter into libdv, which is increased by dv_init()
  and decreased by dv_cleanup(). Should be thread save ideally.

- Better solution IMHO: Call dv_cleanup() automatically by a function,
  which has  __attribute__ ((destructor)). This is a gcc only solution,
  but It's portable and works fine in ffmpeg and libquicktime.

Any thoughts?

BTW I use libdv ONLY for extracting the audio samples from a DV frame.
Actual decoding is done via libavcodec. If there are better solutions for
this task (except libavformat), let me know. I need this for decoding raw
DV streams and type 1 DV AVIs, code is here:

http://cvs.sourceforge.net/viewcvs.py/gmerlin/gmerlin_avdecoder/lib/dvfra=
me.c?rev=3D1.3&view=3Dmarkup

Please CC me, I'm not subscribed.

Cheers

Burkhard