Fix a comment typo.
Align an array properly.
Make x264_scan8 unsigned: saves a bunch of movsxd instructions on x86_64.

Fixes configuration with Intel compiler in some cases.

Instead, if it happens, just re-encode the MB at higher QPs until it fits.

SSE2/SSSE3/SSE4/AVX implementations.
About 3x faster.

These aren't merged versions, they just call the existing asm code.
A merged implementation would of course be faster.

Also fix broken thread detection on cygwin.

Reduces Intel Compiler's bias against non-Intel CPUs.

Big thanks to Agner for the original information on how to do this.

Big thanks to David Rudie, the original author of this patch.

Doesn't affect compiled output outside of LLVM.

SSSE3 code got used in MMX/SSE2 and vice versa (in hpel).

Caused problems for some players.

More accurate but a bit slower.  Helps deal with a few obnoxious corner cases where the current algorithm failed.

Luckily didn't affect anything due to C signedness rules.

Caused noise reduction to run incorrectly in part of RD, but probably had no effect.

Caused x264 to fail with some settings on systems that return a NULL pointer for malloc(0), like Solaris.

Aspect ratio can't be set before SPS is initted.

Now updates every 0.25s instead of every N frames.

MSDN docs claim that SetConsoleTitle's effect is reverted when the process terminates, but this doesn't always work properly.
Accordingly, manually revert the console title at the end of encoding.

It seems to work fine as-is even though real weightp doesn't support interlacing yet.

Compile error if there's two functions of the same name, instead of silently renaming one of them.

Also fix dumb bug in VBV emergency AQ scaling.

Regression in r1881.

Patch backported from ffmpeg.