From b0782552d1b9a8f467446765b2a84318a6635e6f Mon Sep 17 00:00:00 2001
From: Antonin Portelli <antonin.portelli@me.com>
Date: Fri, 27 Jun 2025 15:58:47 +0100
Subject: [PATCH] safer convolution

---
 lib/LatAnalyze/Numerical/DWT.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/LatAnalyze/Numerical/DWT.cpp b/lib/LatAnalyze/Numerical/DWT.cpp
index a886484..0c2ab4f 100644
--- a/lib/LatAnalyze/Numerical/DWT.cpp
+++ b/lib/LatAnalyze/Numerical/DWT.cpp
@@ -38,6 +38,10 @@ void filterConvolution(MatType &out, const MatType &data,
 {
     Index n = data.rows(), nf = n*filter.size();
 
+    if (&out == &data)
+    {
+        LATAN_ERROR(Argument, "filter convolution does not support in-place operation");
+    }
     out.resizeLike(data);
     out.fill(0.);
     for (unsigned int i = 0; i < filter.size(); ++i)