void ff_xvmc_pack_pblocks(MpegEncContext *s, int cbp) { int i, j = 0; const int mb_block_count = 4 + (1 << s->chroma_format); cbp <<= 12-mb_block_count; for (i = 0; i < mb_block_count; i++) { if (cbp & (1 << 11)) s->pblocks[i] = &s->block[j++]; else s->pblocks[i] = NULL; cbp += cbp; } }