From 01d644b76e062934e772e35b712156cbe477f0cd Mon Sep 17 00:00:00 2001
From: Jens Ahrensfeld <jens@jayfield.org>
Date: Sat, 8 Nov 2025 16:22:30 +0100
Subject: [PATCH] added test_mix_3

---
 delay/buffer.hpp         |  5 +++++
 delay/tests/Makefile     |  2 +-
 delay/tests/test_mix.cpp | 42 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 48 insertions(+), 1 deletion(-)

diff --git a/delay/buffer.hpp b/delay/buffer.hpp
index c5c9e1c..613e98f 100644
--- a/delay/buffer.hpp
+++ b/delay/buffer.hpp
@@ -89,6 +89,11 @@ class Buffer
 		return m_capacity/m_increment;
 	}
 
+	T *raw() const
+	{
+		return &m_buffer[m_index];
+	}
+
 	void reset()
 	{
 		m_index = 0;
diff --git a/delay/tests/Makefile b/delay/tests/Makefile
index 9cb5ad8..183f62c 100644
--- a/delay/tests/Makefile
+++ b/delay/tests/Makefile
@@ -15,7 +15,7 @@ INCLUDES += -I $(realpath .) -I $(realpath ../../)
 
 CXX_SRCS := test_main.cpp test_buffer.cpp test_buffer_multi.cpp test_mix.cpp
 
-LIBS := -lstdc++
+LIBS := -lstdc++ -lm
 
 run: link
 	@echo Running $(TARGET)
diff --git a/delay/tests/test_mix.cpp b/delay/tests/test_mix.cpp
index 3507485..d99259e 100644
--- a/delay/tests/test_mix.cpp
+++ b/delay/tests/test_mix.cpp
@@ -5,6 +5,7 @@
 
 #include <cstdio>
 #include <iostream>
+#include <ostream>
 
 
 int test_mix_1()
@@ -71,9 +72,50 @@ int test_mix_2()
 	return 0;
 }
 
+int test_mix_3()
+{
+	const int nCh = 5;
+	dsp::BufferMulti<double> r_buf(nCh, 10);
+	for (int i=0; i < r_buf.capacity(); i++)
+	{
+		r_buf = (double)i/10 ;
+		++r_buf;
+	}
+//	r_buf.reset();
+
+	dsp::Buffer<double> qbuf(r_buf.quer({-2, -10, -4, 3, -3}));
+	dsp::Buffer<double> sbuf(nCh);
+	dsp::Buffer<double> s_spec = {-1, 0, -3, 2, -4};
+	Shuffle<double>::outOfPlace(qbuf, sbuf, s_spec);
+
+	double *q = sbuf.raw();
+
+	for (int i=0; i < nCh; i++)
+	{
+		std::cout << q[i] << " ";
+	}
+	std::cout << std::endl;
+
+	Hadamard<double, nCh>::inPlace(q);
+	for (int i=0; i < nCh; i++)
+	{
+		std::cout << q[i] << " ";
+	}
+	std::cout << std::endl;
+
+	Householder<double, nCh>::inPlace(q);
+	for (int i=0; i < nCh; i++)
+	{
+		std::cout << q[i] << " ";
+	}
+	std::cout << std::endl;
+	return 0;
+}
+
 int test_mix()
 {
 	test_mix_1();
 	test_mix_2();
+	test_mix_3();
 	return 0;
 }
\ No newline at end of file