Avoid some memleaks.

All the other examples already use the system installed headers.

These rules are already in gmake builtins.

Reduce diff against avconv, and change some doxycomments into normal
comments (no point in doxifying ffmpeg internal fields).

Most of the code is moved to buffersrc.c
to help Git see the similarities.

src_buffer.c still contains the obsolete compatibility functions.

The format change detection code was removed as it has been
implemented directly in ffmpeg.
It can easily be brought back from the history.

It restores ABI compatibility with libav.

The fields that move were very recent or morally private.

* qatar/master:
  doc: Replace some @file tags by more suitable markup.
  fate: Set FUZZ factor of vorbis-13 test to 2.
  fate: Set FUZZ factor of (e)ac3-encode test to 3.
  fate: remove unused code from regressions-funcs.sh
  rtmp: Don't assume path points to a string of nonzero length
  avconv: fix behavior with -ss as an output option.

Conflicts:
	doc/platform.texi
	doc/protocols.texi
	ffmpeg.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Found-by: ubitux
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

These helpers are handy, just notice the user it is done using lavfi.

This allow specifying hexadecimal channel layout, and also handle the
error printing internally.

The errors need to be defined before including functions depending on
them. See av_size_mult() for instance. stddef.h is included for the
prototype of av_sterror (use of size_t).

all_channel_layouts.h is not a real header file and breaks make checkheaders.

The difference from this should be pretty small.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This fixes a regression that apparently was missed when switching to the
in af resampler
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This is necessary to account for different rounding done in the 3DNow!
Assembly optimizations.