[FFmpeg-devel] Fixpoint FFT optimization, with MDCT and IMDCT wrappers for audio optimization

[Marc Hoffman]

On 7/29/07, Diego Biurrun <diego at biurrun.de> wrote:
> On Sun, Jul 29, 2007 at 02:14:19PM -0400, mmh wrote:
> >
> > I think I got the integration issues out now.  Thanks for all the great input.
> >
> > --- configure (revision 9807)
> > +++ configure (working copy)
> > @@ -608,6 +608,7 @@
> >      v4l2
> >      x11grab
> >      zlib
> > +    fixedpoint
> >  '
>
> Alphabetical order please, also this seems to be unused.
>
> > @@ -686,6 +687,7 @@
> >      sys_soundcard_h
> >      termios_h
> >      threads
> > +    fixedpoint
> >  "
>
> ditto
>
> > --- libavcodec/Makefile       (revision 9807)
> > +++ libavcodec/Makefile       (working copy)
> > @@ -358,6 +358,10 @@
> >  OBJS-$(CONFIG_VP6F_DECODER)            += i386/vp3dsp_mmx.o i386/vp3dsp_sse2.o
> >  endif
> >
> > +ifeq ($(HAVE_FIXEDPOINT),yes)
> > +OBJS += fft_fixedpoint.o
> > +endif
>
> This can be done in one line like all the other entries in the Makefile.
>
> I don't quite understand what CONFIG_FIXEDPOINT/HAVE_FIXEDPOINT is
> supposed to do, you're not setting the variable anywhere and thus it
> will not find its way into config.mak and make will not compile the
> file ...
>

I set it by hand with configure --enable-fixedpoint.

which created the following

mmh at yoda$ grep FIXEDPOINT config.mak config.h
config.mak:HAVE_FIXEDPOINT=yes
config.mak:CONFIG_FIXEDPOINT=yes
config.h:#define HAVE_FIXEDPOINT 1
config.h:#define ENABLE_FIXEDPOINT 1
config.h:#define CONFIG_FIXEDPOINT 1
config.h:#define ENABLE_FIXEDPOINT 1
mmh at yoda$

Actually right now the only thing that happens is the execution of the
init routine from the fft init code.

Thanks
Marc