quant_array_idx    95 libavcodec/aacenc_ltp.c     ltp->coef_idx = quant_array_idx(max_ratio, ltp_coef, 8);
quant_array_idx   153 libavcodec/aacenc_tns.c         idx[i] = quant_array_idx(coef[i], quant_arr, c_bits ? 16 : 8);