diff options
| author | Michael Niedermayer <michaelni@gmx.at> | 2013-01-12 20:27:35 +0400 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2013-01-12 20:43:29 +0400 |
| commit | 68ff7d265f17d9475d8e648d55d04ea9d1d41cdb (patch) | |
| tree | 3f85f63e55b5d98774d5b15ac0cc7e25714083cb /libswresample/dither_template.c | |
| parent | b5d9e5d06cb6b4e207471a5ac594a10a2901c100 (diff) | |
swr: use local variable for ns_errors
71 -> 63 kcycles
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libswresample/dither_template.c')
| -rw-r--r-- | libswresample/dither_template.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/libswresample/dither_template.c b/libswresample/dither_template.c index 992a2ac629..88d3260fc5 100644 --- a/libswresample/dither_template.c +++ b/libswresample/dither_template.c @@ -33,14 +33,15 @@ void RENAME(swri_noise_shaping)(SwrContext *s, AudioData *dsts, const AudioData const float *noise = ((const float *)noises->ch[ch]) + s->dither.noise_pos; const DELEM *src = (const DELEM*)srcs->ch[ch]; DELEM *dst = (DELEM*)dsts->ch[ch]; + float *ns_errors = s->dither.ns_errors[ch]; pos = s->dither.ns_pos; for (i=0; i<count; i++) { double d1, d = src[i]*S_1; for(j=0; j<taps; j++) - d -= s->dither.ns_coeffs[j] * s->dither.ns_errors[ch][pos + j]; + d -= s->dither.ns_coeffs[j] * ns_errors[pos + j]; pos = pos ? pos - 1 : taps - 1; d1 = rint(d + noise[i]); - s->dither.ns_errors[ch][pos + taps] = s->dither.ns_errors[ch][pos] = d1 - d; + ns_errors[pos + taps] = ns_errors[pos] = d1 - d; d1 *= S; CLIP(d1); dst[i] = d1; |