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Use this in 8-bit loopfilter functions so they can be used if
there is no aligned stack (e.g. x86-32 MSVC or ICC 10.x).

This is obviously bad user input, but x264 shouldn't crash if it happens.

GAS doesn't seem to like spaces in vld1 anymore, so remove those.

Doesn't actually affect x264, but it's more correct.

Slightly wrong numbers in level table.

Solaris responds correctly to the same value as Cygwin, so let's use that.

Allocate AVFrames correctly with avcodec_alloc_frame().
This caused crashes with newer libavcodecs that try to free frame extradata.

Fixes a possible regression in r2228.

Small compression improvement; up to ~0.5% in extreme cases.
Helps more with small slice sizes (tiny resolutions or slice-max-size).
Note that this changes the 2-pass stats file format.

Use the first macroblock of each slice instead of the last of the previous.
Lets us pick a reasonable initial QP for the first slice too.
Slightly improved compression.

Doesn't actually change encoding behavior, but makes it more correct.
Warning messages should now be accurate at higher bit depths and non-4:2:0.
Technically, since it redefines x264_level_t, this is an API version increment.

The name "3dnowext" is more common than "3dnow2". Doesn't affect x264.

This allows overriding the value from outside the file.
This can be useful if x86inc.asm is used outside of x264.

The Apple A6 CPU doesn't support performance counters, so this test caused a crash.

Lossless mode can't currently be enabled mid-stream.

ICL's preprocessor doesn't handle it correctly.
This fix is similar to libav's fix in 0db2d9.

Prerequisite for another configure patch after this.
Idea copied from libpthread.

This feature lets the callee know which decoded macroblocks have changed.

x264 would free mb_info before it was completely done using it.

Add the input frame opaque pointer to the arguments.
This makes it easier to use with multiple simultaneous x264 encodes.

Allow fast skipping even if the pskip MV isn't zero.

Useful to judge the resulting quality of a frame when VBV is enabled.

Previously it was policy to use -pthread, but OpenBSD now recommends -lpthread.
its been libpthread anyway and policy has changed to stop using -pthread.

Backported from libav.

This eliminates a memory leak when calling x264_encoder_close.

People don't seem to like this so I'm just going to get rid of it.

Fix a typo that made an early-skip less effective.
Avoid a relatively unpredictable branch.
Slightly changed output due to the typo-fix.
~50 cycles faster on Core i7.

Turn off the sub8x8 partitions, try it, and turn them back on if it didn't help.
Small compression improvement with p4x4 on (~0.1-0.5%).
Also update related comments.

Implement a basic separable bilinear filter to rescale the quantizer offsets.
Structure inspired by swscale, but floating-point instead of fixed-point.
Not as optimized as it could be, but it's quite fast already.

Example compression penalties on a 720p video game recording:
First pass with 720p and second as 480p: ~-1.5% (vs. same res)
First pass with 480p and second as 720p: ~-3% (vs. same res)

Limits VBV mispredictions after long periods of relatively constant video.

Allow manual invocation of WIN64_SPILL_XMM even under INIT_MMX
SSE version of mova is movaps rather than movdqa.
YMM version of movnta.
Add mp size for named arguments.
Fix DEFINE_ARGS when used outside of a cglobal.
Define a few more cpuflags.
3-argument wrappers for a few more instructions.

Fix some integer overflows and check input parameters better.
Also fix incorrect type specifiers for demuxer info printing.