+10l to me, I blame the aliens.

Fixes memleak spotted by FATE.

Warning note suggested by Reimar.

The functions which actually drive the filter graph by pushing
frames through it need to ensure an aligned stack for SIMD functions.

This fixes a crash in YADIF filter when using a mingw build in a MSVC application.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Regression since de3e0ab3.

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

The filter already checks that width (and height) are greater than 3.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

These smaller samples do not need to be unpacked to double words
allowing the code to process more pixels every iteration (still 2 in MMX
but 6 in SSE2).  It also avoids emulating the missing double word
instructions on older instruction sets.

Like with the previous code for 16-bit samples this has been tested on
an Athlon64 and a Core2Quad.

Athlon64:
1809275 decicycles in C,    32718 runs, 50 skips
 911675 decicycles in mmx,  32727 runs, 41 skips, 2.0x faster
 495284 decicycles in sse2, 32747 runs, 21 skips, 3.7x faster

Core2Quad:
 921363 decicycles in C,     32756 runs, 12 skips
 486537 decicycles in mmx,   32764 runs,  4 skips, 1.9x faster
 293296 decicycles in sse2,  32759 runs,  9 skips, 3.1x faster
 284910 decicycles in ssse3, 32759 runs,  9 skips, 3.2x faster
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This is a fairly dumb copy of the assembly for 8-bit samples but it
works and produces identical output to the C version.  The options have
been tested on an Athlon64 and a Core2Quad.

Athlon64:
1810385 decicycles in C,    32726 runs, 42 skips
1080744 decicycles in mmx,  32744 runs, 24 skips, 1.7x faster
 818315 decicycles in sse2, 32735 runs, 33 skips, 2.2x faster

Core2Quad:
 924025 decicycles in C,     32750 runs, 18 skips
 623995 decicycles in mmx,   32767 runs,  1 skips, 1.5x faster
 406223 decicycles in sse2,  32764 runs,  4 skips, 2.3x faster
 387842 decicycles in ssse3, 32767 runs,  1 skips, 2.4x faster
 307726 decicycles in sse4,  32763 runs,  5 skips, 3.0x faster
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Reconfiguring can break x264 lossless encoding.

Fixes ticket #2165.

Since lavfi works natively with AVFrame now, these functions are no longer
necessary and can be removed in a future bump.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

* qatar/master:
  af_join: do not leak input frames.
  asrc_anullsrc: return EOF, not -1

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

* commit 'f4281f45':
  asrc_anullsrc: do not set samplerate and channel layout explicitly

Conflicts:
	libavfilter/asrc_anullsrc.c

No change to FFmpeg due to semantic difference between the filter sources
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'e4a7b217':
  vf_showinfo: remove its useless init function
  AVOptions: fix using named constants with child contexts.

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

* commit '9676b9a2':
  AVOption: remove an unused function parameter.
  filters.texi: restore mistakenly removed section name for noformat
  avfiltergraph: use sizeof(var) instead of sizeof(type)
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '42c7c61a':
  avfiltergraph: replace AVFilterGraph.filter_count with nb_filters

Conflicts:
	doc/APIchanges
	libavfilter/avfiltergraph.c
	libavfilter/avfiltergraph.h
	libavfilter/graphparser.c
	libavfilter/version.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '556aab8f':
  lavfi: use designated initializers in avfilter_class

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

* commit 'aa3c7799':
  lavf: sanity check size in av_get/append_packet().

Conflicts:
	libavformat/utils.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'ca6c3f2c':
  lzo: fix overflow checking in copy_backptr()
  flacdec: simplify bounds checking in flac_probe()
  atrac3: avoid oversized shifting in decode_bytes()

Conflicts:
	libavformat/flacdec.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

This is admittedly kind of pointless since usually -f image2pipe
can be used for the purpose, but this is more user-friendly.
Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

Otherwise ffmpeg -formats claims that we only support demuxing
of that format.
To keep compatibility the struct could be duplicated instead,
but this seems almost like overkill for such a rare format.
Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

- Make MultiByteToWideChar fail when it encounters invalid encoding.
  Without this, invalid characters might just be skipped
- When MultiByteToWideChar fails, assume the file name is in CP_ACP
  and open it via normal open function, even when the file will be
  written
- When malloc fails return error instead of crashing
Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

They are auto-negotiated.

Filter private data is memset to 0 so there is no point in explicitly
initing anything to 0.

The named constant needs to be searched for in the same object on which
the option is set, i.e. target_obj.