MJPEG Tools Svn

Added a fix for MAC where the compiler hat a probelm with compilinge the ASM part.
The Patch was provided by Trent Piepho

Added the patch from Franz Brauße
He wrote SSE2-accelerated versions of filter_plane_median()
and temporal_filter_planes()

Tuning: some minor tweaking on video buffer gain

Fixed: muchtoo large video buffer feedback gains.
Fixed: missing clamping of bit allocation (-ve allocations
could be produced which caused craziness...)

Fixed: oops clamping quantisation >= 2.0 rather than 1.0
Fixed: Less biased intra quantisation (merely rounds rather than
biased slightly away from 0.
Added: flat quantisation matrices that should hopefully be less
prone to blocka artefacts for very-low-q encoding of pictures
with little noise/very little texture.
Added: MJPEGTOOLS_SIMD_DISABLE tags for disabling SIMD fdct and idct.

msg.txt

Fixed: mquant predictor was being set from suggested quantization
and not the actualy quantization after possible incrmements to
avoid saturation.
Experimental: fixed some obvious oops in the look-ahead rate-controller
adjusted a ridiculous large gain in pass-1 and put in
some additional 'sanity' limits on rate-control feedback.

This commit was manufactured by cvs2svn to create tag 'y4mdenoise_v4_beta1'.

Finally fixed the earthquaking problem in dark/cloudy areas!

The problem was that the match-size-throttle was picking a bad match
before it ever had a chance to find a good match.

Now, the match-size-throttle isn't applied unless the
match-count-throttle is also exceeded, or the end of a line is reached.

This has led to a SERIOUS quality increase, without making y4mdenoise
any slower than it was before!

Fixed typos