uint8_t *src_m2, *src_m1, *src_0, *src_p1, *src_p2;
const uint8_t *src_m2, *src_m1, *src_0, *src_p1, *src_p2;
static void deinterlace_bottom_field(uint8_t *dst, int dst_wrap,                                    uint8_t *src1, int src_wrap,                                    int width, int height){    uint8_t *src_m2, *src_m1, *src_0, *src_p1, *src_p2;    int y;    src_m2 = src1;    src_m1 = src1;    src_0=&src_m1[src_wrap];    src_p1=&src_0[src_wrap];    src_p2=&src_p1[src_wrap];    for(y=0;y<(height-2);y+=2) {        memcpy(dst,src_m1,width);        dst += dst_wrap;        deinterlace_line(dst,src_m2,src_m1,src_0,src_p1,src_p2,width);        src_m2 = src_0;        src_m1 = src_p1;        src_0 = src_p2;        src_p1 += 2*src_wrap;        src_p2 += 2*src_wrap;        dst += dst_wrap;    }    memcpy(dst,src_m1,width);    dst += dst_wrap;    /* do last line */    deinterlace_line(dst,src_m2,src_m1,src_0,src_0,src_0,width);}