RepoMirrors
/
ffmpeg
mirror of https://git.ffmpeg.org/ffmpeg.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

avfilter/af_acrossover: really fix single-pole allpass coefficients 

Now LR2, LR6, LR10, LR14 and LR18 have really flat sum.
This commit is contained in:
Paul B Mahol 2020-11-28 14:37:06 +01:00
parent ea8c05a3e7
commit 68adb68e96
1 changed files with 2 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
libavfilter/af_acrossover.c
View File

@ -211,11 +211,9 @@ static void set_ap(BiquadContext *b, double fc, double q, double sr)
static void set_ap1(BiquadContext *b, double fc, double sr) static void set_ap1(BiquadContext *b, double fc, double sr)
{ {
double omega = 0.5 * M_PI * fc / sr + M_PI_4; double omega = M_PI * fc / sr;
double cosine = cos(omega);
double sine = sin(omega);
b->a1 = -cosine / sine; b->a1 = exp(-omega);
b->a2 = 0.; b->a2 = 0.;
b->b0 = -b->a1; b->b0 = -b->a1;
b->b1 = 1.; b->b1 = 1.;