Both the fixed as well as the floating point mpegaudio decoders use
LUTs of type int8_t and uint32_t with 32K entries each; these tables
are completely the same, yet they are not shared. This commit makes
them shared. When both fixed as well as floating point decoders are
enabled, this saves 160KiB from the bss segment for a normal build
(translating into 160KiB less memory usage if both a shared as well as
a floating point decoder have actually been used) and 160KiB from the
binary for a build with hardcoded tables.

It also means that the code to create said LUTs is no longer duplicated
(for a normal build).
Signed-off-by: NAndreas Rheinhardt <andreas.rheinhardt@gmail.com>

Signed-off-by: NDiego Biurrun <diego@biurrun.de>

Also switch from "tbl" to "tab" name suffixes.

Signed-off-by: NMans Rullgard <mans@mansr.com>

This drops one parameter from the functions' macros, and require structures
to be typedeffed, but ensures that it is possible to map 1-to-1 the type to
the function name.

Originally committed as revision 23820 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 22761 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 20627 to svn://svn.ffmpeg.org/ffmpeg/trunk

Reduces .bss size by about 194 kB.

Originally committed as revision 20400 to svn://svn.ffmpeg.org/ffmpeg/trunk