Fix warnings:
cmdutils.c: In function ‘opt_default’:
cmdutils.c:304: warning: initialization discards qualifiers from pointer target type
cmdutils.c: In function ‘set_context_opts’:
cmdutils.c:431: warning: passing argument 2 of ‘alloc_priv_context’ discards qualifiers from pointer target type
cmdutils.c:414: note: expected ‘struct AVClass *’ but argument is of type ‘const struct AVClass *’

Also remove -x264opts item from the ffmpeg manual, since it belongs to
the encoders section.

Make Audio Encoders a separate chapter, and decrese the contained
sections level by one.

Improve rendering, and improve consistency with the other parts of the
manual.

Muxers are not used by ffprobe.

Fix leak.

Avoid the presence of an invalid pointer, fix a crash in case of
get_filtered_frame() failure.

The check is no more required since recent changes in the
avfilter_unref_buffer(), the check is done in the function.
Simplify.

Fix compilation.

* qatar/master:
  qdm2: Use floating point synthesis filter.
  h264: correct border check.
  h264: fix loopfilter with threading at slice boundaries.
  Fix ff_mpa_synth_filter_fixed() prototype
  Rename costablegen.c ---> cos_tablegen.c.
  Collapse tableprint.c into tableprint.h.
  Simplify trig table rules
  Remove potentially unstable filenames from comments in generated files.
  Ignore generated tables and generated table generator programs.
  Simplify CLEANFILES make variable by using wildcards.
  Remove silly insults from avformat_version() Doxygen documentation.
  mpegaudiodsp: fix x86 and ppc makefiles
  configure: Adjust AVX assembler check.
  mpegaudio: remove unused version of SAME_HEADER_MASK
  mpegaudio: remove useless #undef at end of file
  asfdec: add missing #include for av_bswap32()
  mpegaudio: merge two #if CONFIG_FLOAT blocks
  mpegaudio: move some struct definitions from mpegaudio.h
  Move some mpegaudio functions to new mpegaudiodsp subsystem

Conflicts:
	libavcodec/h264.c
	libavcodec/x86/Makefile
Merged-by: Michael Niedermayer <michaelni@gmx.at>

This avoid needlessly convertion from floating point to fixed point and back.
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

When backing up the top-left border, check that the top-left
(rather than left) MB indeed does belong to our slice. If it
doesn't, backing up has no positive effect but may accidentally
interfere with other threads writing in the same space.

Fixes occasional one-off effects when enabling slice-MT.

The prototype should use the same typedefs as the definition, or it
will fail where int32_t is not int (DOS apparently).
Signed-off-by: Mans Rullgard <mans@mansr.com>

The new function is a wrapper around
av_vsrc_buffer_add_video_buffer_ref(), and allows to simplify the act
of pushing AVFrame data to the source buffer.

Avoid the need of two distinct av_vsrc_add_video_buffer_ref*
functions. Simplify the interface.

Simplify passing AVFrame data to av_vsrc_buffer_add_video_buffer_ref().

Rename av_vsrc_buffer_add_frame to
av_vsrc_buffer_add_video_buffer_ref(), and change its inteface to make
it accept in input an AVFilterBufferRef rather than an AVFrame.

This way the interface can be used without requiring the
inclusion/installation of libavcodec headers.

This is consistent with how all other table generation programs are named.
Moreover this ensures that the cos table generation program is correctly
deleted when cleaning the tree.

tableprint.c serves little purpose on its own and removing it allows building
the table generator programs with the normal HOSTPROGS Makefile rules.

This collapses the make rules for the trig tables into a pattern
rule.  Based on a patch by Diego, modified to avoid using fragile
make constructs and allow future addition of fixed-point sin tables.
Signed-off-by: Mans Rullgard <mans@mansr.com>

Also ensures that generated file cos_fixed_tables.c is deleted on 'make clean'.

Signed-off-by: Mans Rullgard <mans@mansr.com>

Older nasm versions have trouble assembling certain AVX instructions, but the
current AVX check did not detect this. Update the check to use an instruction
that triggers the nasm problem.

Signed-off-by: Mans Rullgard <mans@mansr.com>