[FFmpeg-devel] remove libavutil/random.[ch]

[Michael Niedermayer]

On Sat, Mar 21, 2009 at 03:01:29PM +0100, Diego Biurrun wrote:
> libavutil/random.[ch] are deprecated and no longer used anywhere within
> FFmpeg.  I propose deleting them, libavutil is currently in an unstable
> state anyway.

i agree with droping it

also if someone distrusts the ALFG/MLFG/LCG then we can add:
George Marsaglias KISS99 (init from me and surely not ideal, sha1/md5
should be used)

typedef struct KISSState{
    uint32_t z,w,jsr,jcong;
}KISSState;

static uint32_t get_random(KISSState *s){
    s->z    = (s->z>>16) + 36969*(s->z&0xFFFF);
    s->w    = (s->w>>16) + 18000*(s->w&0xFFFF);
    s->jsr ^= s->jsr<<17;
    s->jsr ^= s->jsr>>13;
    s->jsr ^= s->jsr<< 5;
    s->jcong= 1234567 + 69069*s->jcong; 
    return ((s->w + (s->z<<16)) ^ s->jcong) + s->jsr;
}

static void init_random(KISSState *s, uint32_t seed){
    s->z    = 362436069 ^   seed;
    s->w    = 521288629 ^ (987654321*seed);
    s->jsr  = 123456789 +   seed;
    s->jcong= 380116160 -  314159265*seed;
}

[...]

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

It is not what we do, but why we do it that matters.
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