[FFmpeg-cvslog] r12246 - in trunk: configure libavcodec/avcodec.h libavdevice/avdevice.h libavformat/avformat.h libavutil/avutil.h libpostproc/postprocess.h

[Michael Niedermayer]

On Wed, Feb 27, 2008 at 11:05:53PM +0000, M?ns Rullg?rd wrote:
> Diego Biurrun <diego at biurrun.de> writes:
> 
> > On Tue, Feb 26, 2008 at 09:37:59PM +0100, mru wrote:
> >> 
> >> Log:
> >> less preprocessor magic in version number macros
> >> 
> >> --- trunk/libavutil/avutil.h	(original)
> >> +++ trunk/libavutil/avutil.h	Tue Feb 26 21:37:59 2008
> >> @@ -30,16 +30,20 @@
> >>  
> >> +#define AV_VERSION_INT(a, b, c) (a<<16 | b<<8 | c)
> >> +#define AV_VERSION_DOT(a, b, c) a ##.## b ##.## c
> >> +#define AV_VERSION(a, b, c) AV_VERSION_DOT(a, b, c)
> >
> > Why the indirection with AV_VERSION_DOT?
> 
> Otherwise you get LIBAVCODEC_VERSION defined as 51 . 50 . 1 (note the
> spaces), which is not what we want.  It's our saving grace that a C
> "preprocessor number" can contain any number of dots (but only one at
> a time).

Yes, but if it were a string (yes theoretic API break) we could use
AV_STRINGIFY() and avoid these 3 macros above.

[...]

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

No snowflake in an avalanche ever feels responsible. -- Voltaire
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