Should improve user feedback in case of errors.

* qatar/master:
  fate: Allow setting the ld parameter from the config file
  x86: dsputil: Do not redundantly check for CPU caps before calling init funcs
  configure: Disable some warnings in MSVC
  x86: vp56: cmov version of vp56_rac_get_prob requires inline asm
  avopt: fix examples to match the same style about default values as the actual code.
  configure: Add support for MSVC cl.exe/link.exe
  lavu: add snprintf(), vsnprint() and strtod() replacements for MS runtime.

Conflicts:
	libavutil/opt.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>

This reverts commit ba537202.
A better implementation has been commited by the same author to qatar

Conflicts:

	configure
Found-by: jamal <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* commit '0db2d942':
  dsputil: workaround __VA_ARGS__ missing tokenization for MSVC
  configure: add section for libc-specific hacks
  build: disable ranlib on mingw
  parser: Don't use pc as context for av_dlog
  h264: Remove an assert on current_picture_ptr being null

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

The native filter transpose is perfectly equivalent.

Signed-off-by: Martin Storsjö <martin@martin.st>

The init functions check for CPU capabilities on their own already.

Signed-off-by: rogerdpack <rogerpack2005@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

Fix a failure when running do_lavfi_pixfmts() for the
lavfi-tinterlace_merge and lavfi-tinterlace_pad tests concurrently.

Since they were using the same names for the temporary files, the first
ending test was removing them, and the second test was failing at
removing unexisting files.

Only the merge and pad modes are tested.

Make do_lavfi_pixfmts() support an user-specified name for the test.

This allows to specify two pixfmts tests for the same filter, e.g. to
test a filter with different parameters. Useful for the pending
tinterlace tests.

Increase performance (slightly).

If not set to NULL, the reference is freed by ff_end_frame(), and later
accessed in end_frame() by the filter code, causing a crash.

Make internal small_strptime() function public, and use it in place of
strptime().
This allows to avoid a dependency on strptime() on systems which do not
support it.

In particular, fix trac ticket #992.

This is consistent with the standard definition of strptime().

read_seek was undeprecated in e5c70815.

This disables the following warnings:
C4100: unreferenced formal parameter
 (1035 occurrances)
C4214: nonstandard extension used : bit field types other than int
 (609 occurances)
C4996: 'avpriv_snprintf': This function or variable may be unsafe.
       Consider using _snprintf_s instead. To disable deprecation,
       use _CRT_SECURE_NO_WARNINGS. See online help for details.
 (351 occurrances)
Signed-off-by: Martin Storsjö <martin@martin.st>

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

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

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

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

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

FFT in MIPS implementation is working iteratively instead
 of "recursively" calling functions for smaller FFT sizes.
Some of DSP and format convert utils functions are also optimized.
Signed-off-by: Nedeljko Babic <nbabic@mips.com>
Reviewed-by: Vitor Sessak <vitor1001@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Martin Storsjö <martin@martin.st>

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

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

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

Allow to specify NULL values explicitly, thus overriding the default
values set in the context.

Signed-off-by: Martin Storsjö <martin@martin.st>

Signed-off-by: Martin Storsjö <martin@martin.st>

A second expansion forces the preprocessor to tokenize properly.
Signed-off-by: Martin Storsjö <martin@martin.st>

Signed-off-by: Martin Storsjö <martin@martin.st>

Using ranlib is not required but prevents using the libraries with
msvc.
Signed-off-by: Mans Rullgard <mans@mansr.com>
Signed-off-by: Martin Storsjö <martin@martin.st>

* qatar/master:
  build: eamad: Add missing dependency on mpegvideo code
  build: utvideoenc: Add missing dependency on Huffman code
  avopt: Reorder the default_val struct, making i64 the first field

Conflicts:
	configure
	doc/APIchanges
	libavutil/version.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>

The ParserContext class doesn't have an AVClass, required for
using it as a logging class.
Signed-off-by: Martin Storsjö <martin@martin.st>

* commit '21bc4403':
  avopt: Explicitly store rational option defaults in .dbl

Conflicts:
	libavfilter/buffersrc.c
	libavfilter/vsrc_testsrc.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'c7b610aa':
  avopt: Explicitly store float/double option defaults in .dbl

Conflicts:
	libavcodec/ac3dec.c
	libavcodec/libx264.c
	libavfilter/af_amix.c
	libavfilter/af_asyncts.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>