static void pitch_xcorr(const float *_x, const float *_y, float *corr, int len, int nb_pitch, char *stack)
static void pitch_xcorr(const spx_word16_t *_x, const spx_word16_t *_y, spx_word32_t *corr, int len, int nb_pitch, char *stack)
static void pitch_xcorr(const float *_x, const float *_y, float *corr, int len, int nb_pitch, char *stack){   int i;   for (i=0;i<nb_pitch;i++)   {      /* Compute correlation*/      corr[nb_pitch-1-i]=inner_prod(_x, _y+i, len);   }}