[mythtv] [PATCH] Clogged filters

[Nigel Pearson]

Problems:

1) A lot of the filters have common stuff that should be abstracted
    (e.g. mm_support() or emms() for non-Intel compilation,
          content of .pro files are nearly identical)

2) Several dummy functions are needlessly defined for non-MMX

3) Altivec accelleration is not determined at run time

4) Using i386 instead of MMX.

    We could go either way here (same with HAVE_ALTIVEC and 
ARCH_POWERPC),
    but I will assume for now that MMX or HAVE_ALTIVEC indicate intent
    to compile in accelerated code, rather than ability of the compiler
    to process MMX-specific operands, or vector style extensions.



	Attached is a few new files for the filters directory,
which abstract the common stuff, and a patch to get the src
to use them (also contains some tidyup).

	Better names (or other criticism) gladly accepted/debated,
otherwise I will commit in a few days?

% cd filters

% cvs diff -u *.pro */*.pro */*.c >../../patch.general.14

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