test/test_pcm: merge source buffer generator

test/test_pcm_util.hxx

@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <glib.h>
+
+#include <array>
+
+#include <stddef.h>
+#include <stdint.h>
+
+template<typename T>
+struct GlibRandomInt {
+	T operator()() const {
+		return T(g_random_int());
+	}
+};
+
+struct GlibRandomInt24 : GlibRandomInt<int32_t> {
+	int32_t operator()() const {
+		auto t = GlibRandomInt::operator()();
+		t &= 0xffffff;
+		if (t & 0x800000)
+			t |= 0xff000000;
+		return t;
+	}
+};
+
+struct GlibRandomFloat {
+	float operator()() const {
+		return g_random_double_range(-1.0, 1.0);
+	}
+};
+
+template<typename T, size_t N>
+class TestDataBuffer : std::array<T, N> {
+public:
+	using typename std::array<T, N>::const_pointer;
+	using std::array<T, N>::begin;
+	using std::array<T, N>::end;
+	using std::array<T, N>::operator[];
+
+	template<typename G=GlibRandomInt<T>>
+	TestDataBuffer(G g=G()):std::array<T, N>() {
+		for (auto &i : *this)
+			i = g();
+
+	}
+
+	operator typename std::array<T, N>::const_pointer() const {
+		return begin();
+	}
+};