RepoMirrors/mpv
1
0
Fork 0
mirror of https://github.com/mpv-player/mpv synced 2025-04-01 23:00:41 +00:00
Code Issues Releases Wiki Activity

Fixed lround replacement, hopefully fast enough.

Browse Source 
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@6440 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
atmos4 2002-06-16 01:44:33 +00:00
parent 56d5ebb2fc
commit a5737c25ee
1 changed files with 9 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
libao2/pl_eq.c
View File

@ -89,16 +89,21 @@ static int control(int cmd,int arg){
return CONTROL_UNKNOWN;
}
// return rounded 16bit int
static inline int16_t lround16(double n){
return (int16_t)((n)>=0.0?(n)+0.5:(n)-0.5);
}
// 2nd order Band-pass Filter design
void bp2(int16_t* a, int16_t* b, float fc, float q){
double th=2*3.141592654*fc;
double C=(1 - tan(th*q/2))/(1 + tan(th*q/2));
a[0] = (int16_t)( 16383.0 * (1 + C) * cos(th) + 0.5);
a[1] = (int16_t)(-16383.0 * C + 0.5);
a[0] = lround16( 16383.0 * (1 + C) * cos(th));
a[1] = lround16(-16383.0 * C);
b[0] = (int16_t)(-16383.0 * (C - 1)/2 + 0.5);
b[1] = (int16_t)(-16383.0 * 1.0050 + 0.5);
b[0] = lround16(-16383.0 * (C - 1)/2);
b[1] = lround16(-16383.0 * 1.0050);
}
// empty buffers