int run;
int prev;
static always_inline void dv_encode_ac(EncBlockInfo* bi, PutBitContext* pb_pool,                                        int pb_size){    int run;    int bits_left;    PutBitContext* pb = pb_pool;    int size = bi->partial_bit_count;    uint32_t vlc = bi->partial_bit_buffer;        bi->partial_bit_count = bi->partial_bit_buffer = 0;vlc_loop:       /* Find suitable storage space */       for (; size > (bits_left = put_bits_left(pb)); pb++) {          if (bits_left) {              size -= bits_left;	      put_bits(pb, bits_left, vlc >> size);	      vlc = vlc & ((1<<size)-1);	  }	  if (pb_size == 1) {	      bi->partial_bit_count = size;	      bi->partial_bit_buffer = vlc;	      return;	  }	  --pb_size;       }              /* Store VLC */       put_bits(pb, size, vlc);              /* Construct the next VLC */       run = 0;       for (; bi->cur_ac < 64; bi->cur_ac++, run++) {           if (bi->mb[bi->cur_ac]) {	       size = dv_rl2vlc(run, bi->mb[bi->cur_ac], &vlc);	       bi->cur_ac++;	       goto vlc_loop;	   }       }          if (bi->cur_ac == 64) {           size = 4; vlc = 6; /* End Of Block stamp */	   bi->cur_ac++;	   goto vlc_loop;       }}