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avfilter/af_afftdn: stop producing small impulsive noise at start of output

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This commit is contained in:
Paul B Mahol 2022-03-14 10:02:18 +01:00
parent 19614921e9
commit a71a3d1ed2
1 changed files with 5 additions and 6 deletions
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11
libavfilter/af_afftdn.c
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@ -329,13 +329,15 @@ static double limit_gain(double a, double b)
return 1.0;
}
static void process_frame(AudioFFTDeNoiseContext *s, DeNoiseChannel *dnch,
static void process_frame(AVFilterContext *ctx,
AudioFFTDeNoiseContext *s, DeNoiseChannel *dnch,
AVComplexFloat *fft_data,
double *prior, double *prior_band_excit, int track_noise)
{
AVFilterLink *outlink = ctx->outputs[0];
const double sample_floor = s->sample_floor;
const double *abs_var = dnch->abs_var;
const double ratio = s->ratio;
const double ratio = outlink->frame_count_out ? s->ratio : 1.0;
const double rratio = 1. - ratio;
const int *bin2band = s->bin2band;
double *band_excit = dnch->band_excit;
@ -784,7 +786,6 @@ static int config_input(AVFilterLink *inlink)
for (int ch = 0; ch < inlink->channels; ch++) {
DeNoiseChannel *dnch = &s->dnch[ch];
double *prior_band_excit = dnch->prior_band_excit;
double *prior = dnch->prior;
double min, max;
double p1, p2;
@ -828,8 +829,6 @@ static int config_input(AVFilterLink *inlink)
dnch->band_excit[i] = av_clipd(dnch->band_excit[i], min, max);
}
for (int i = 0; i <= s->fft_length2; i++)
prior[i] = 1.0 - s->ratio;
for (int i = 0; i < s->buffer_length; i++)
dnch->out_samples[i] = 0;
@ -1067,7 +1066,7 @@ static int filter_channel(AVFilterContext *ctx, void *arg, int jobnr, int nb_job
dnch->tx_fn(dnch->fft, dnch->fft_out, fft_in, sizeof(float));
process_frame(s, dnch, dnch->fft_out,
process_frame(ctx, s, dnch, dnch->fft_out,
dnch->prior,
dnch->prior_band_excit,
s->track_noise);