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Much less efficient than YUV444, but easy to support using the YUV444 framework.

MB-tree and qcomp complexity estimation now consider the duration of a frame in their calculations.
This is very important for visual optimizations, as frames that last longer are inherently more important quality-wise.
Improves VFR-aware PSNR as much as 1-2db on extreme test cases, ~0.5db on more ordinary VFR clips (e.g. deduped anime episodes).

WARNING: This change redefines x264's internal quality measurement.
x264 will now scale its quality based on the framerate of the video due to the aforementioned frame duration logic.
That is, --crf X will give lower quality per frame for a 60fps video than for a 30fps one.
This will make --crf closer to constant perceptual quality than previously.
The "center" for this change is 25fps: that is, videos lower than 25fps will go up in quality at the same CRF and videos above will go down.
This choice is completely arbitrary.

Note that to take full advantage of this, x264 must encode your video at the correct framerate, with the correct timestamps.

And various cosmetics.

Patch from Google Code-In

Patch from Google Code-In.

Patch from Google Code-In.

This only works up to and including 10-bit (but we don't support anything higher yet).

Add support for high depth input in libx264.
Add support for 16-bit colorspaces in the filtering system.
Add support for input bit depths in the interval [9,16] with the raw demuxer.
Add a depth filter to dither input to x264.

Update dates, improve file descriptions, make things more consistent.
Also add information about commercial licensing.

~1% faster overall on Conroe, mostly due to improved cache locality.
Also allows improved SIMD on some chroma functions (e.g. deblock).
This change also extends the API to allow direct NV12 input, which should be a bit faster than YV12.
This isn't currently used in the x264cli, as swscale does not have fast NV12 conversion routines, but it might be useful for other applications.

Note this patch disables the chroma SIMD code for PPC and ARM until new versions are written.

Output bit depth is specified on compilation time via --bit-depth.
There is currently almost no assembly code available for high-bit-depth modes, so encoding will be very slow.
Input is still 8-bit only; this will change in the future.

Note that very few H.264 decoders support >8 bit depth currently.
Also note that the quantizer scale differs for higher bit depth.  For example, for 10-bit, the quantizer (and crf) ranges from 0 to 63 instead of 0 to 51.

Unify input/output defines to HAVE_* format.
Define values as 1 to simplify conditionals.

Necessary for future high bit-depth support.
Various macros and extra types have been introduced to make operations on variable-size pixels more convenient.

Merge lowres_types with lowres_costs.

Convert all applicable loops to use C99 loop index syntax.
Clean up most inconsistent syntax in ratecontrol.c, visualize, ppc, etc.
Replace log(x)/log(2) constructs with log2, and similar with log10.
Fix all -Wshadow violations.
Fix visualize support.

Merge Dylan's Google Summer of Code 2009 tree.
Detect fades and use weighted prediction to improve compression and quality.
"Blind" mode provides a small overall quality increase by using a -1 offset without doing any analysis, as described in JVT-AB033.
"Smart", the default mode, also performs fade detection and decides weights accordingly.
MB-tree takes into account the effects of "smart" analysis in lookahead, even further improving quality in fades.
If psy is on, mbtree is on, interlaced is off, and weightp is off, fade detection will still be performed.
However, it will be used to adjust quality instead of create actual weights.
This will improve quality in fades when encoding in Baseline profile.

Doesn't add support for interlaced encoding with weightp yet.
Only adds support for luma weights, not chroma weights.
Internal code for chroma weights is in, but there's no analysis yet.
Baseline profile requires that weightp be off.
All weightp modes may cause minor breakage in non-compliant decoders that take shortcuts in deblocking reference frame checks.
"Smart" may cause serious breakage in non-compliant decoders that take shortcuts in handling of duplicate reference frames.

Thanks to Google for sponsoring our most successful Summer of Code yet!

weirdly, valgrind reported this only with --no-asm.

prefetch, memcpy_aligned, memzero_aligned, avg, mc_luma, get_ref, mc_chroma, hpel_filter, frame_init_lowres

1.6x faster on conroe.

there should now be no memory allocation outside of init-time.

Also suppress the last mingw warning message

reduce memory if using ESA and not p4x4

This improves lossless compression by about 4-25% depending on source.
The benefit is generally higher for intra-only compression.
Also add support for 8x8dct and i8x8 blocks in lossless mode; this improves compression very slightly.
In some rare cases 8x8dct can hurt compression in lossless mode, but its usually helpful, albeit marginally.
Note that 8x8dct is only available with CABAC as it is never useful with CAVLC.
High 4:4:4 Predictive replaced the previous profile in a 2007 revision to the H.264 standard.
The only known compliant decoder for this profile is the latest version of CoreAVC.
As I write this, JM does not actually correctly decode this profile.
Hopefully this lack of support will soon change with this commit, as x264 will be (to my knowledge) the first compliant encoder.

avg_weight no longer has to be special-cased in the code; faster weightb

This allows the use of get_ref instead of mc_luma almost everywhere for bipred

This vastly speeds up b-adapt 2, especially at large bframes values.
This changes output because now MV prediction in lookahead only uses L0/L1 MVs, not bidir.  This isn't a problem, since the bidir prediction wasn't really correct to begin with, so the change in output is neither positive nor negative.
This also allowed the removal of some unnecessary memsets, which should also give a small speed boost.
Finally, this allows the use of the lowres motion vectors for predictors in some future patch.

Resolves some issues with QP51 in I-frames with scenecut

Update "Authors" lists based on actual authorship; highest is most important
Update copyright notices and remove old CVS tags from file headers
Add file headers to GTK and other sections missing them
Update FSF address
Other header-related cosmetics

rounding is changed for asm convenience. this makes the c version slower, but there's no way around that if all the implementations are to have the same results.