244    double interp[4];  in compute_func()  local
250    interp[3] =  -0.1666666667*frac + 0.1666666667*(frac*frac*frac);  in compute_func()
251    interp[2] = frac + 0.5*(frac*frac) - 0.5*(frac*frac*frac);  in compute_func()
253    interp[0] = -0.3333333333*frac + 0.5*(frac*frac) - 0.1666666667*(frac*frac*frac);  in compute_func()
255    interp[1] = 1.f-interp[3]-interp[2]-interp[0];  in compute_func()
258 …return interp[0]*func->table[ind] + interp[1]*func->table[ind+1] + interp[2]*func->table[ind+2] + …  in compute_func()
303 static void cubic_coef(spx_word16_t x, spx_word16_t interp[4])  in cubic_coef()
310 …interp[0] = PSHR32(MULT16_16(QCONST16(-0.16667f, 15),x) + MULT16_16(QCONST16(0.16667f, 15),x3),15);  in cubic_coef()
311    interp[1] = EXTRACT16(EXTEND32(x) + SHR32(SUB32(EXTEND32(x2),EXTEND32(x3)),1));  in cubic_coef()
312 …interp[3] = PSHR32(MULT16_16(QCONST16(-0.33333f, 15),x) + MULT16_16(QCONST16(.5f,15),x2) - MULT16_…  in cubic_coef()
314    interp[2] = Q15_ONE-interp[0]-interp[1]-interp[3];  in cubic_coef()
315    if (interp[2]<32767)  in cubic_coef()
316       interp[2]+=1;  in cubic_coef()
319 static void cubic_coef(spx_word16_t frac, spx_word16_t interp[4])  in cubic_coef()
323    interp[0] =  -0.16667f*frac + 0.16667f*frac*frac*frac;  in cubic_coef()
324    interp[1] = frac + 0.5f*frac*frac - 0.5f*frac*frac*frac;  in cubic_coef()
326    interp[3] = -0.33333f*frac + 0.5f*frac*frac - 0.16667f*frac*frac*frac;  in cubic_coef()
328    interp[2] = 1.-interp[0]-interp[1]-interp[3];  in cubic_coef()
456       spx_word16_t interp[4];  in resampler_basic_interpolate_single()  local
470       cubic_coef(frac, interp);  in resampler_basic_interpolate_single()
471 …um = MULT16_32_Q15(interp[0],accum[0]) + MULT16_32_Q15(interp[1],accum[1]) + MULT16_32_Q15(interp[…  in resampler_basic_interpolate_single()
474       cubic_coef(frac, interp);  in resampler_basic_interpolate_single()
475 …_product_single(iptr, st->sinc_table + st->oversample + 4 - offset - 2, N, st->oversample, interp);  in resampler_basic_interpolate_single()
519       spx_word16_t interp[4];  in resampler_basic_interpolate_double()  local
533       cubic_coef(frac, interp);  in resampler_basic_interpolate_double()
534 …um = MULT16_32_Q15(interp[0],accum[0]) + MULT16_32_Q15(interp[1],accum[1]) + MULT16_32_Q15(interp[…  in resampler_basic_interpolate_double()
536       cubic_coef(frac, interp);  in resampler_basic_interpolate_double()
537 …_product_double(iptr, st->sinc_table + st->oversample + 4 - offset - 2, N, st->oversample, interp);  in resampler_basic_interpolate_double()