RepoMirrors/ffmpeg
1
0
Fork 0
mirror of https://git.ffmpeg.org/ffmpeg.git synced 2024-12-27 18:02:11 +00:00
Code Issues Projects Releases Wiki Activity

psymodel: dont apply lowpass filters with a cutoff close to the nyquist

Browse Source 
The IIR filter numerically diverges in such cases, this could easily be
fixed but would make the filter slower on some platforms

Fixes Ticket2246

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-03-07 19:28:30 +01:00
parent cada996528
commit fee5da6b0a
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
libavcodec/psymodel.c
View File

@ -106,7 +106,7 @@ av_cold struct FFPsyPreprocessContext* ff_psy_preprocess_init(AVCodecContext *av
if (!cutoff_coeff && avctx->codec_id == AV_CODEC_ID_AAC)
cutoff_coeff = 2.0 * AAC_CUTOFF(avctx) / avctx->sample_rate;
if (cutoff_coeff)
if (cutoff_coeff && cutoff_coeff < 0.98)
ctx->fcoeffs = ff_iir_filter_init_coeffs(avctx, FF_FILTER_TYPE_BUTTERWORTH,
FF_FILTER_MODE_LOWPASS, FILT_ORDER,
cutoff_coeff, 0.0, 0.0);