forked from jengelh/ffmpeg-6
Jan Engelhardt
fea91b2355
OBS-URL: https://build.opensuse.org/package/show/multimedia:libs/ffmpeg-6?expand=0&rev=32
72 lines
3.1 KiB
Diff
72 lines
3.1 KiB
Diff
From 4671fb7dfb8e72b228e04f3b81da7f2003c62240 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 00:38:56 +0100
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Subject: [PATCH] avfilter/af_dialoguenhance: simplify channels copy
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References: https://bugzilla.opensuse.org/1222730
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References: CVE-2023-49528
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---
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libavfilter/af_dialoguenhance.c | 32 +++++++++++++++++---------------
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1 file changed, 17 insertions(+), 15 deletions(-)
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diff --git a/libavfilter/af_dialoguenhance.c b/libavfilter/af_dialoguenhance.c
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index 29c8ab10a7..5c8614c185 100644
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--- a/libavfilter/af_dialoguenhance.c
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+++ b/libavfilter/af_dialoguenhance.c
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@@ -249,20 +249,21 @@ static int de_stereo(AVFilterContext *ctx, AVFrame *out)
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float *left_osamples = (float *)out->extended_data[0];
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float *right_osamples = (float *)out->extended_data[1];
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float *center_osamples = (float *)out->extended_data[2];
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- const int offset = s->fft_size - s->overlap;
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- const int nb_samples = FFMIN(s->overlap, s->in->nb_samples);
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+ const int overlap = s->overlap;
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+ const int offset = s->fft_size - overlap;
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+ const int nb_samples = FFMIN(overlap, s->in->nb_samples);
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float vad;
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// shift in/out buffers
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- memmove(left_in, &left_in[s->overlap], offset * sizeof(float));
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- memmove(right_in, &right_in[s->overlap], offset * sizeof(float));
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- memmove(left_out, &left_out[s->overlap], offset * sizeof(float));
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- memmove(right_out, &right_out[s->overlap], offset * sizeof(float));
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+ memmove(left_in, &left_in[overlap], offset * sizeof(float));
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+ memmove(right_in, &right_in[overlap], offset * sizeof(float));
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+ memmove(left_out, &left_out[overlap], offset * sizeof(float));
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+ memmove(right_out, &right_out[overlap], offset * sizeof(float));
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memcpy(&left_in[offset], left_samples, nb_samples * sizeof(float));
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memcpy(&right_in[offset], right_samples, nb_samples * sizeof(float));
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- memset(&left_out[offset], 0, s->overlap * sizeof(float));
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- memset(&right_out[offset], 0, s->overlap * sizeof(float));
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+ memset(&left_out[offset], 0, overlap * sizeof(float));
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+ memset(&right_out[offset], 0, overlap * sizeof(float));
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apply_window(s, left_in, windowed_left, 0);
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apply_window(s, right_in, windowed_right, 0);
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@@ -292,14 +293,15 @@ static int de_stereo(AVFilterContext *ctx, AVFrame *out)
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apply_window(s, windowed_oleft, left_out, 1);
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- for (int i = 0; i < s->overlap; i++) {
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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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+ memcpy(left_osamples, left_in, overlap * sizeof(float));
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+ memcpy(right_osamples, right_in, overlap * sizeof(float));
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+
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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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- center_osamples[i] = 0.f;
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- left_osamples[i] = left_in[i];
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- right_osamples[i] = right_in[i];
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+ } else {
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+ memset(center_osamples, 0, overlap * sizeof(float));
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}
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return 0;
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--
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2.44.0
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