• Diego Pettenò's avatar
    Make ff_inverse stay with libavutil, and optional copy it to libavcodec. · 3fc548df
    Diego Pettenò authored
    The ff_inverse table is used by FASTDIV macro, defined in libavutil, but up
    to now the table was defined only in libavcodec.
    
    After this change, the main copy of ff_inverse is part of libavutil (just
    like FASTDIV), but if CONFIG_SMALL is unset, then a different copy is made
    available to libavcodec, to avoid the performance penalty of using an
    external look up table.
    
    Dynamic linking works, because the libraries are linked with -Bsymbolic, so
    the local copy of the symbol has priority over the external; static linking
    works because the table is on a standalone object file in both libraries,
    so the linker is able to discard one of the two.
    
    Tested on Linux/x86-64 and Mac OS X/x86-64.
    
    Originally committed as revision 24383 to svn://svn.ffmpeg.org/ffmpeg/trunk
    3fc548df
Makefile 3.88 KB