Instead of a linked list constructed at av_register_all(), store them
in a constant array of pointers.

Since no registration is necessary now, this removes some global state
from lavf. This will also allow the urlprotocol layer caller to limit
the available protocols in a simple and flexible way in the following
commits.

They are only written to, never read.

Now all IO should go through the IO callbacks and be interceptable by
the caller.

There is no real reason to treat them differently.

avio_close() can only be called on AVIOContexts created by avio_open(2).

It will in general not be available. Use block_align if known or fall
back to av_get_audio_frame_duration().

Reported-By: Maxim Koitsov <maksbotan@gentoo.org>

Some muxer might or might not fit incomplete mp3 frames in
their packets.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Some muxer might or might not fit incomplete mp3 frames in
their packets.

Bug-Id: 899

CC: libav-stable@libav.org
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

This reverts commits 2edc7187, a2bb771a, 21c750f2, 8e7bea6d.

The WTV demuxer depends on large parts of the MPEG-TS demuxer internals
anyway and fails to build without it.

Signed-off-by: Diego Biurrun <diego@biurrun.de>

Needed for enum AVCodecID

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Do not error out if some subcomponents cannot be enabled.

Reported-By: RT|AO

Also fix #endif comments in the FFT init code.