MJPEG Tools Svn

Fix (or attempt to fix) the pthreads and libquicktime) checks.

Next wave:

o Change mjpegtools version to 1.7.0 --- seriously, so much has changed!
o Reinstated --with-jpeg-mmx.
o Added --without-png option.
o Put AM_CONDITIONAL's closer to where the actual decisions are made.
o Replaced all the pthread stuff with ACX_PTHREAD.
o Use AC_PATH_LIB() for libquicktime.
o Tidied the X finding stuff.

o Created "acinclude.m4" with extra macros.

Remove the fixed/compiled in max pathname length of 80 characters. Do a little
cleanup and modernization and remove the unreferenced AIFF routines since
mp2enc has been WAV only all along.

More scrub-a-dub-dubbing:

o Fix mailing list name ("@lists.sourceforge.net").
o Ensure --with-quicktime and --with-dv default to 'on'.
o Remove --with-dv-yv12 option.
o Various quoting ([,]) cleanups.
o Caching of PRID64_STRING_FORMAT.
o Remove oddball host/build typing. (Stick to $host, etc.)
o Remove IRIX bits.
o Remove GLIB bits.
o Clean-up libquicktime check.
o Use pkg-config for libpng, libdv.
o Clean up __progname check/caching.
o Clean up GTK, SDL checks.
o Remove BUILD_MJPEG.
o Remove definition of VERSION (since automake already does this).
o Remove mjpegtools-config.

Remove the ancient
"If building for IRIX, compile a program that does absolutely nothing."
#ifndef silliness.

A bit of "String Cleaning" for the ol' configure.ac.
Mmmm, smell the freshness!

Removed/updated some more anachronisms.

fix the usage of AM_INIT_AUTOMAKE and AC_INIT. Use the correct form of AC_INIT_AUTOMAKE
to specify automake 1.6.3 as the minimum version required. Rename configure.in
to configure.ac

Don't print the warning message about chroma supersampling for 444. Reject the 1 and 4 plane formats.

Update the jpeg2yuv manpage with the -R option and remove the comment about
jpeg2yuv not rescaling the chroma to the 16-235 range.