for(level=-255; level<256; level++){
for(level=-256; level<256; level++){
static void init_h263_dc_for_msmpeg4(){    static int inited=0;        if(!inited){        int level, uni_code, uni_len;        inited=1;        for(level=-255; level<256; level++){            int size, v, l;            /* find number of bits */            size = 0;            v = abs(level);            while (v) {                v >>= 1;		    size++;            }            if (level < 0)                l= (-level) ^ ((1 << size) - 1);            else                l= level;            /* luminance h263 */            uni_code= DCtab_lum[size][0];            uni_len = DCtab_lum[size][1];            uni_code ^= (1<<uni_len)-1; //M$ doesnt like compatibility            if (size > 0) {                uni_code<<=size; uni_code|=l;                uni_len+=size;                if (size > 8){                    uni_code<<=1; uni_code|=1;                    uni_len++;                }            }            v2_dc_lum_table[level+256][0]= uni_code;            v2_dc_lum_table[level+256][1]= uni_len;            /* chrominance h263 */            uni_code= DCtab_chrom[size][0];            uni_len = DCtab_chrom[size][1];            uni_code ^= (1<<uni_len)-1; //M$ doesnt like compatibility                        if (size > 0) {                uni_code<<=size; uni_code|=l;                uni_len+=size;                if (size > 8){                    uni_code<<=1; uni_code|=1;                    uni_len++;                }            }            v2_dc_chroma_table[level+256][0]= uni_code;            v2_dc_chroma_table[level+256][1]= uni_len;        }    }}