MJPEG Tools Svn

Checked in y4mdenoise "version 3 beta 3".

A bunch of little bug fixes, and a couple of big performance
improvements, found while reading over the code.

Checked in y4mdenoise "version 3 beta 2".

These are all of the cleanups and performance improvements I can think
of. The next step is to rewrite the code to take maximum advantage of
symmetric multiprocessing. The only changes I plan to check in before
that will be fixes for any bugs found.

the memory is freed everywhere else before returning except here, the non-errpr
case.

This commit was manufactured by cvs2svn to create tag 'y4mdenoise_v3_beta1'.

This is what I'm calling "version 3 beta" of y4mdenoise! I've finally
found a practical implementation of my original idea.

Now, each matched pixel-group is flood-filled, and the resulting region
is added to the search-border. Matched pixel-groups that already exist
in the search-border are not flood-filled again, saving lots of time.
The match-throttles still exist to keep pathological cases from
happening, but now regions can be removed from the search-border,
pruned of resolved pixels, and re-added to the search-border if it's no
longer the biggest match. y4mdenoise is finally able to apply the
largest matches and work its way down to the smaller matches without
losing any potentially useful information.

This is "beta" because I haven't finished all the performance
improvements I want to do, and I haven't rewritten the manual page yet,
but it's working well enough to unleash on the other mjpegtools
developers for their comments.

Fixed more multithreaded problems in y4mdenoise. I wasn't using enough
private allocators, and so threads could potentially stomp each other
when allocating memory.

Another fix to y4mdenoise's threading, this time to get rid of a
potential double condition-signal. (One condition-signal is enough.)

If zero is specified for -z/-Z, skip the zero-motion pass entirely.
(I thought I had done this already...oops!)

y4mdenoise would sometimes hang if an earlier process in the pipeline
quit unexpectedly, preventing the pipeline from cleaning up properly.
The read-ahead thread just has to wake up its client before it exits
with an error, and now it works.

Fixed the installation directory of the mjpeg-howto file.
Line 103 creates a ${_prefix}/share/info directory, but the %post
and %postun sections referred to ${_prefix}/info . Now those
sections properly refer to ${_prefix}/share/info.