From f25ba8b39380d3bbe1b58b6422062427d19b787c Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 20 Oct 2004 19:06:29 +0000 Subject: [PATCH] optimization Originally committed as revision 3616 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/resample2.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/libavcodec/resample2.c b/libavcodec/resample2.c index ad303a4498..22f787dc16 100644 --- a/libavcodec/resample2.c +++ b/libavcodec/resample2.c @@ -42,7 +42,7 @@ #define FELEM_MAX INT16_MAX #define FELEM_MIN INT16_MIN #else -#define FILTER_SHIFT 24 +#define FILTER_SHIFT 22 #define FELEM int32_t #define FELEM2 int64_t @@ -193,12 +193,12 @@ int av_resample(AVResampleContext *c, short *dst, short *src, int *consumed, int }else{ #ifdef LINEAR int64_t v=0; - int sub_phase= (frac<<12) / c->src_incr; + int sub_phase= (frac<<8) / c->src_incr; for(i=0; ifilter_length; i++){ - int64_t coeff= filter[i]*(FELEM2)(4096 - sub_phase) + filter[i + c->filter_length]*(FELEM2)sub_phase; + int64_t coeff= filter[i]*(256 - sub_phase) + filter[i + c->filter_length]*sub_phase; v += src[sample_index + i] * coeff; } - val= v>>12; + val= v>>8; #else for(i=0; ifilter_length; i++){ val += src[sample_index + i] * (FELEM2)filter[i];