ffmpeg | branch: master | Paul B Mahol <one...@gmail.com> | Mon Oct 19 18:34:50 2020 +0200| [f7379eafd276fd105441367759d4ca45f4c8d363] | committer: Paul B Mahol
avfilter/af_aiir: fix sp2zp mapping > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f7379eafd276fd105441367759d4ca45f4c8d363 --- libavfilter/af_aiir.c | 14 ++++---------- 1 file changed, 4 insertions(+), 10 deletions(-) diff --git a/libavfilter/af_aiir.c b/libavfilter/af_aiir.c index c5df4b1202..64bd78ad8a 100644 --- a/libavfilter/af_aiir.c +++ b/libavfilter/af_aiir.c @@ -877,23 +877,17 @@ static void convert_sp2zp(AVFilterContext *ctx, int channels) for (n = 0; n < iir->nb_ab[0]; n++) { double sr = iir->ab[0][2*n]; double si = iir->ab[0][2*n+1]; - double snr = 1. + sr; - double sdr = 1. - sr; - double div = sdr * sdr + si * si; - iir->ab[0][2*n] = (snr * sdr - si * si) / div; - iir->ab[0][2*n+1] = (sdr * si + snr * si) / div; + iir->ab[0][2*n] = exp(sr) * cos(si); + iir->ab[0][2*n+1] = exp(sr) * sin(si); } for (n = 0; n < iir->nb_ab[1]; n++) { double sr = iir->ab[1][2*n]; double si = iir->ab[1][2*n+1]; - double snr = 1. + sr; - double sdr = 1. - sr; - double div = sdr * sdr + si * si; - iir->ab[1][2*n] = (snr * sdr - si * si) / div; - iir->ab[1][2*n+1] = (sdr * si + snr * si) / div; + iir->ab[1][2*n] = exp(sr) * cos(si); + iir->ab[1][2*n+1] = exp(sr) * sin(si); } } } _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
