int ff_set_systematic_pal(uint32_t pal[256], enum PixelFormat pix_fmt){

    int i;



    for(i=0; i<256; i++){

        int r,g,b;



        switch(pix_fmt) {

        case PIX_FMT_RGB8:

            r= (i>>5    )*36;

            g= ((i>>2)&7)*36;

            b= (i&3     )*85;

            break;

        case PIX_FMT_BGR8:

            b= (i>>6    )*85;

            g= ((i>>3)&7)*36;

            r= (i&7     )*36;

            break;

        case PIX_FMT_RGB4_BYTE:

            r= (i>>3    )*255;

            g= ((i>>1)&3)*85;

            b= (i&1     )*255;

            break;

        case PIX_FMT_BGR4_BYTE:

            b= (i>>3    )*255;

            g= ((i>>1)&3)*85;

            r= (i&1     )*255;

            break;

        case PIX_FMT_GRAY8:

            r=b=g= i;

            break;



        }

        pal[i] =  b + (g<<8) + (r<<16);

    }



    return 0;

}