Configurations for different decoders

[aviz]

I am building the activex plugin, with cygwin.
I am getting confused by all the configuration flags.
My questions:

1. I have seen that previous version had these flags:
--enable-ffmpeg
[--with-ffmpeg-a52 --with-ffmpeg-mp3lame --with-ffmpeg-zlib --with-ffmpeg-amrnb --with-ffmpeg-amrwb --with-ffmpeg-faac --with-ffmpeg-theora --with-ffmpeg-vorbis ]
These flags seems to be not supported in 0.9.8a.
Does it mean that the VLC no longer uses ffmpeg decoders? Is it because it uses own decoders? Is there a way to include those decoders?

2. I need to support a certain set of formats (which are all supported by VLC). I want to map the configuration flags to those formats.
Can you please tell me which flags enable/disable the decoders for each of these formats:
a. mpeg 2
b. h.264
c. mpeg 4 part 2
d. aac
e. mpeg 1 layer 2
f. mp3
g. ac3

Thanks,
Avi

[Jean-Baptiste Kempf]

ffmpeg is by default.