forked from jengelh/ffmpeg-5
43 lines
1.5 KiB
Diff
43 lines
1.5 KiB
Diff
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From f1f973313b6edc460339c2dfa4675dd3ad72fe98 Mon Sep 17 00:00:00 2001
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From: Paul B Mahol <onemda@gmail.com>
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Date: Mon, 27 Nov 2023 11:52:37 +0100
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Subject: [PATCH] avfilter/af_dialoguenhance: do output scaling once
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---
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libavfilter/af_dialoguenhance.c | 11 ++++-------
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1 file changed, 4 insertions(+), 7 deletions(-)
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diff --git a/libavfilter/af_dialoguenhance.c b/libavfilter/af_dialoguenhance.c
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index 5c8614c185..2674313f5c 100644
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--- a/libavfilter/af_dialoguenhance.c
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+++ b/libavfilter/af_dialoguenhance.c
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@@ -108,7 +108,7 @@ static int config_input(AVFilterLink *inlink)
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generate_window_func(s->window, s->fft_size, WFUNC_SINE, &overlap);
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- iscale = 1.f / s->fft_size;
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+ iscale = 1.f / (s->fft_size * 1.5f);
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ret = av_tx_init(&s->tx_ctx[0], &s->tx_fn, AV_TX_FLOAT_RDFT, 0, s->fft_size, &scale, 0);
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if (ret < 0)
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@@ -296,13 +296,10 @@ static int de_stereo(AVFilterContext *ctx, AVFrame *out)
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memcpy(left_osamples, left_in, overlap * sizeof(float));
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memcpy(right_osamples, right_in, overlap * sizeof(float));
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- // 4 times overlap with squared hanning window results in 1.5 time increase in amplitude
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- if (!ctx->is_disabled) {
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- for (int i = 0; i < overlap; i++)
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- center_osamples[i] = left_out[i] / 1.5f;
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- } else {
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+ if (ctx->is_disabled)
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memset(center_osamples, 0, overlap * sizeof(float));
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- }
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+ else
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+ memcpy(center_osamples, left_out, overlap * sizeof(float));
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return 0;
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}
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--
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2.44.0
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