gprof is far too intrusive to be of use as a profile for ffmpeg,
and it fails to build in many configurations. Oprofile is a
better tool for profiling on Linux.
Originally committed as revision 23807 to svn://svn.ffmpeg.org/ffmpeg/trunk
decided it was a great idea to put some (bogus, of course) C function
prototypes there and it doesn't seem worth bothering working around
that since all we wanted is HAVE_GPROF.
Originally committed as revision 3304 to svn://svn.ffmpeg.org/ffmpeg/trunk
takes the most time, and it allows for more efficient unaligned access
and better control over memory latencies.
Originally committed as revision 711 to svn://svn.ffmpeg.org/ffmpeg/trunk
allows better scheduling of the memory accesses, and is portable among
all compilers.
Originally committed as revision 709 to svn://svn.ffmpeg.org/ffmpeg/trunk
