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Code Issues Releases Activity

avfilter/af_dialoguenhance: do output scaling once

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This commit is contained in:
Paul B Mahol 2023-11-27 11:52:37 +01:00
parent b1942734c7
commit f1f973313b
1 changed files with 4 additions and 7 deletions
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11
libavfilter/af_dialoguenhance.c
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@ -108,7 +108,7 @@ static int config_input(AVFilterLink *inlink)
generate_window_func(s->window, s->fft_size, WFUNC_SINE, &overlap);
iscale = 1.f / s->fft_size;
iscale = 1.f / (s->fft_size * 1.5f);
ret = av_tx_init(&s->tx_ctx[0], &s->tx_fn, AV_TX_FLOAT_RDFT, 0, s->fft_size, &scale, 0);
if (ret < 0)
@ -296,13 +296,10 @@ static int de_stereo(AVFilterContext *ctx, AVFrame *out)
memcpy(left_osamples, left_in, overlap * sizeof(float));
memcpy(right_osamples, right_in, overlap * sizeof(float));
// 4 times overlap with squared hanning window results in 1.5 time increase in amplitude
if (!ctx->is_disabled) {
for (int i = 0; i < overlap; i++)
center_osamples[i] = left_out[i] / 1.5f;
} else {
if (ctx->is_disabled)
memset(center_osamples, 0, overlap * sizeof(float));
}
else
memcpy(center_osamples, left_out, overlap * sizeof(float));
return 0;
}