[xine-devel] ffmpeg sync notes

[Miguel F. <mfr...@gm...>]

hi,

this time the ffmpeg sync took me quite some time, i'd like to post
some notes about what i did. specially because some things which still
need attention...

- i tried to bring our copy closer to the main ffmpeg tree by using
the same CONFIG_xxx_DECODER and ENABLE_xxx_DECODER they use. now the
configure.ac will create a ffmpeg_config.h with all these defines.

- ffmpeg codecs are separated in two groups that can be
enabled/disabled: uncommon and popular. the idea is that "uncommon" is
any codec that i would never want to use in my zaurus, so i may save
some memory there*.

- disabled codecs are currently not registered but they are still
built. i don't know how we can change our libavcodec/Makefile.am to do
the same as ffmpeg do (not compiling disabled modules). any help would
be appreciated here, i'm quite a lamer when it comes to
autoconf/automake magic.

- while testing DR1 bugs i browsed ffmpeg and mplayer sources.
interest finding: mplayer disables DR1 for H264 without any further
comments... what a great idea! this fixes our problem with those big
frameref streams and also some segfaults.

- i implemented a simple "garbage collector" to catch leaked frames
from buggy ffmpeg codecs. this should fix the problem Richard Ash
reported.

- dxr3 mpeg encoder is probably broken, as usual. i tried keeping all
the patches (it would be great if we could drop or simplify this
stuff...)

- somebody asked for VP6 support, it was imported now. have fun.

miguel

* i never compiled xine to zaurus, but opie-mediaplayer2 comes
precompiled and uses libxine.