651    int qn, qb;  in compute_qn()  local
664       qn = 1;  in compute_qn()
666       qn = exp2_table8[qb&0x7]>>(14-(qb>>BITRES));  in compute_qn()
667       qn = (qn+1)>>1<<1;  in compute_qn()
669    celt_assert(qn <= 256);  in compute_qn()
670    return qn;  in compute_qn()
705    int qn;  in compute_theta()  local
731    qn = compute_qn(N, *b, offset, pulse_cap, stereo);  in compute_theta()
733       qn = 1;  in compute_theta()
743    if (qn!=1)  in compute_theta()
749             itheta = (itheta*(opus_int32)qn+8192)>>14;  in compute_theta()
750             if (!stereo && ctx->avoid_split_noise && itheta > 0 && itheta < qn)  in compute_theta()
755                int unquantized = celt_udiv((opus_int32)itheta*16384, qn);  in compute_theta()
760                   itheta = qn;  in compute_theta()
767             int bias = itheta > 8192 ? 32767/qn : -32767/qn;  in compute_theta()
768             down = IMIN(qn-1, IMAX(0, (itheta*(opus_int32)qn + bias)>>14));  in compute_theta()
781          int x0 = qn/2;  in compute_theta()
800             ec_enc_uint(ec, itheta, qn+1);  in compute_theta()
802             itheta = ec_dec_uint(ec, qn+1);  in compute_theta()
805          ft = ((qn>>1)+1)*((qn>>1)+1);  in compute_theta()
810             fs = itheta <= (qn>>1) ? itheta + 1 : qn + 1 - itheta;  in compute_theta()
811             fl = itheta <= (qn>>1) ? itheta*(itheta + 1)>>1 :  in compute_theta()
812              ft - ((qn + 1 - itheta)*(qn + 2 - itheta)>>1);  in compute_theta()
821             if (fm < ((qn>>1)*((qn>>1) + 1)>>1))  in compute_theta()
829                itheta = (2*(qn + 1)  in compute_theta()
831                fs = qn + 1 - itheta;  in compute_theta()
832                fl = ft - ((qn + 1 - itheta)*(qn + 2 - itheta)>>1);  in compute_theta()
839       itheta = celt_udiv((opus_int32)itheta*16384, qn);  in compute_theta()