SHA256
1
0
forked from pool/ffmpeg-5
ffmpeg-5/0001-avfilter-af_dialoguenhance-do-output-scaling-once.patch

43 lines
1.5 KiB
Diff

From f1f973313b6edc460339c2dfa4675dd3ad72fe98 Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Mon, 27 Nov 2023 11:52:37 +0100
Subject: [PATCH] avfilter/af_dialoguenhance: do output scaling once
---
libavfilter/af_dialoguenhance.c | 11 ++++-------
1 file changed, 4 insertions(+), 7 deletions(-)
diff --git a/libavfilter/af_dialoguenhance.c b/libavfilter/af_dialoguenhance.c
index 5c8614c185..2674313f5c 100644
--- a/libavfilter/af_dialoguenhance.c
+++ b/libavfilter/af_dialoguenhance.c
@@ -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;
}
--
2.44.0