diff options
Diffstat (limited to 'libcelt/pitch.c')
| -rw-r--r-- | libcelt/pitch.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/libcelt/pitch.c b/libcelt/pitch.c index 413dc11..e18323f 100644 --- a/libcelt/pitch.c +++ b/libcelt/pitch.c @@ -215,10 +215,21 @@ void find_spectral_pitch(const CELTMode *m, kiss_fftr_cfg fft, const struct PsyD Xr = MULT16_16_16(n, Xr); Xi = MULT16_16_16(n, Xi); #else - n = celt_rsqrt(EPSILON+curve[i]); - /* Pre-multiply X by n, so we can keep everything in 16 bits */ - Xr = EXTRACT16(SHR32(MULT16_16(n, Xr),3)); - Xi = EXTRACT16(SHR32(MULT16_16(n, Xi),3)); + { + celt_word32 t; +#ifdef FIXED_POINT + int k; +#endif + t = EPSILON+curve[i]; +#ifdef FIXED_POINT + k = celt_ilog2(t)>>1; +#endif + t = VSHR32(t, (k-7)<<1); + n = celt_rsqrt_norm(t); + /* Pre-multiply X by n, so we can keep everything in 16 bits */ + Xr = EXTRACT16(PSHR32(MULT16_16(n, Xr),3+k)); + Xi = EXTRACT16(PSHR32(MULT16_16(n, Xi),3+k)); + } #endif /* Cross-spectrum between X and conj(Y) */ *Xptr++ = ADD16(MULT16_16_Q15(Xr, Yptr[0]), MULT16_16_Q15(Xi,Yptr[1])); |