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| author | Michael Niedermayer <michaelni@gmx.at> | 2013-03-07 19:28:30 +0100 |
|---|---|---|
| committer | Carl Eugen Hoyos <cehoyos@ag.or.at> | 2013-03-07 19:58:05 +0100 |
| commit | 088ba9bc3e7629af08e50816c91fc8e84ec8f898 (patch) | |
| tree | 487a82fb40ecb1811f54c0293713e44cd7621be3 | |
| parent | b642e45d8ce81f89a76ef8720c3e7cb69ec5ace6 (diff) | |
| download | ffmpeg-088ba9bc3e7629af08e50816c91fc8e84ec8f898.tar.gz | |
psymodel: dont apply lowpass filters with a cutoff close to the nyquist
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>
(cherry picked from commit fee5da6b0a79bed9dc849f216b6da1e03132b668)
| -rw-r--r-- | libavcodec/psymodel.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/psymodel.c b/libavcodec/psymodel.c index a4a7cbb683..09dd83d315 100644 --- a/libavcodec/psymodel.c +++ b/libavcodec/psymodel.c @@ -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); |