75 const spx_word16_t *ac,  /* in:  [0...p] autocorrelation values  */  in _spx_lpc()  argument
81    spx_word16_t error = ac[0];  in _spx_lpc()
83    if (ac[0] == 0)  in _spx_lpc()
93       spx_word32_t rr = NEG32(SHL32(EXTEND32(ac[i + 1]),13));  in _spx_lpc()
95          rr = SUB32(rr,MULT16_16(lpc[j],ac[i - j]));  in _spx_lpc()
99       r = rr/(error+.003*ac[0]);  in _spx_lpc()
130 spx_word16_t       *ac,  /* out: [0...lag-1] ac values */  in _spx_autocorr()  argument
165       ac[i] = SHR32(d, ac_shift);  in _spx_autocorr()
183 float       *ac,  /* out: [0...lag-1] ac values */  in _spx_autocorr()  argument
194       ac[lag] = d;  in _spx_autocorr()
196    ac[0] += 10;  in _spx_autocorr()