diff options
Diffstat (limited to 'celt/celt.c')
| -rw-r--r-- | celt/celt.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/celt/celt.c b/celt/celt.c index 4f9c9e05..5741b6b5 100644 --- a/celt/celt.c +++ b/celt/celt.c @@ -86,6 +86,33 @@ int resampling_factor(opus_int32 rate) } #ifndef OVERRIDE_COMB_FILTER_CONST +/* This version should be faster on ARM */ +#ifdef OPUS_ARM_ASM +static void comb_filter_const(opus_val32 *y, opus_val32 *x, int T, int N, + opus_val16 g10, opus_val16 g11, opus_val16 g12) +{ + opus_val32 x0, x1, x2, x3, x4; + int i; + x4 = SHL32(x[-T-2], 1); + x3 = SHL32(x[-T-1], 1); + x2 = SHL32(x[-T], 1); + x1 = SHL32(x[-T+1], 1); + for (i=0;i<N;i++) + { + opus_val32 t; + x0=SHL32(x[i-T+2],1); + t = MAC16_32_Q16(x[i], g10, x2); + t = MAC16_32_Q16(t, g11, ADD32(x1,x3)); + t = MAC16_32_Q16(t, g12, ADD32(x0,x4)); + y[i] = t; + x4=x3; + x3=x2; + x2=x1; + x1=x0; + } + +} +#else static void comb_filter_const(opus_val32 *y, opus_val32 *x, int T, int N, opus_val16 g10, opus_val16 g11, opus_val16 g12) { @@ -110,6 +137,7 @@ static void comb_filter_const(opus_val32 *y, opus_val32 *x, int T, int N, } #endif +#endif void comb_filter(opus_val32 *y, opus_val32 *x, int T0, int T1, int N, opus_val16 g0, opus_val16 g1, int tapset0, int tapset1, |