test/test_pcm: merge source buffer generator

5 files changed, 117 insertions, 109 deletions

diff --git a/test/test_pcm_channels.cxx b/test/test_pcm_channels.cxx
index 38d030519..8e013d5af 100644
--- a/test/test_pcm_channels.cxx
+++ b/test/test_pcm_channels.cxx
@@ -19,6 +19,7 @@
 
 #include "config.h"
 #include "test_pcm_all.hxx"
+#include "test_pcm_util.hxx"
 #include "PcmChannels.hxx"
 #include "pcm_buffer.h"
 
@@ -27,11 +28,8 @@
 void
 test_pcm_channels_16()
 {
-	enum { N = 256 };
-	int16_t src[N * 2];
-
-	for (unsigned i = 0; i < G_N_ELEMENTS(src); ++i)
-		src[i] = g_random_int();
+	constexpr unsigned N = 256;
+	const auto src = TestDataBuffer<int16_t, N * 2>();
 
 	struct pcm_buffer buffer;
 	pcm_buffer_init(&buffer);
@@ -65,11 +63,8 @@ test_pcm_channels_16()
 void
 test_pcm_channels_32()
 {
-	enum { N = 256 };
-	int32_t src[N * 2];
-
-	for (unsigned i = 0; i < G_N_ELEMENTS(src); ++i)
-		src[i] = g_random_int();
+	constexpr unsigned N = 256;
+	const auto src = TestDataBuffer<int32_t, N * 2>();
 
 	struct pcm_buffer buffer;
 	pcm_buffer_init(&buffer);
diff --git a/test/test_pcm_dither.cxx b/test/test_pcm_dither.cxx
index 6d1ed686a..2fb976db5 100644
--- a/test/test_pcm_dither.cxx
+++ b/test/test_pcm_dither.cxx
@@ -18,35 +18,20 @@
  */
 
 #include "test_pcm_all.hxx"
+#include "test_pcm_util.hxx"
 #include "PcmDither.hxx"
 
 #include <glib.h>
 
-/**
- * Generate a random 24 bit PCM sample.
- */
-static int32_t
-random24()
-{
-	int32_t x = g_random_int() & 0xffffff;
-	if (x & 0x800000)
-		x |= 0xff000000;
-	return x;
-}
-
 void
 test_pcm_dither_24()
 {
-	PcmDither dither;
-
-	enum { N = 256 };
-	int32_t src[N];
-	for (unsigned i = 0; i < N; ++i)
-		src[i] = random24();
+	constexpr unsigned N = 256;
+	const auto src = TestDataBuffer<int32_t, N>(GlibRandomInt24());
 
 	int16_t dest[N];
-
-	dither.Dither24To16(dest, src, src + N);
+	PcmDither dither;
+	dither.Dither24To16(dest, src.begin(), src.end());
 
 	for (unsigned i = 0; i < N; ++i) {
 		g_assert_cmpint(dest[i], >=, (src[i] >> 8) - 8);
@@ -57,16 +42,12 @@ test_pcm_dither_24()
 void
 test_pcm_dither_32()
 {
-	PcmDither dither;
-
-	enum { N = 256 };
-	int32_t src[N];
-	for (unsigned i = 0; i < N; ++i)
-		src[i] = g_random_int();
+	constexpr unsigned N = 256;
+	const auto src = TestDataBuffer<int32_t, N>();
 
 	int16_t dest[N];
-
-	dither.Dither32To16(dest, src, src + N);
+	PcmDither dither;
+	dither.Dither32To16(dest, src.begin(), src.end());
 
 	for (unsigned i = 0; i < N; ++i) {
 		g_assert_cmpint(dest[i], >=, (src[i] >> 16) - 8);
diff --git a/test/test_pcm_pack.cxx b/test/test_pcm_pack.cxx
index 61acf81ed..e23acad58 100644
--- a/test/test_pcm_pack.cxx
+++ b/test/test_pcm_pack.cxx
@@ -18,6 +18,7 @@
  */
 
 #include "test_pcm_all.hxx"
+#include "test_pcm_util.hxx"
 
 extern "C" {
 #include "pcm_pack.h"
@@ -25,29 +26,14 @@ extern "C" {
 
 #include <glib.h>
 
-/**
- * Generate a random 24 bit PCM sample.
- */
-static int32_t
-random24()
-{
-	int32_t x = g_random_int() & 0xffffff;
-	if (x & 0x800000)
-		x |= 0xff000000;
-	return x;
-}
-
 void
 test_pcm_pack_24()
 {
-	enum { N = 256 };
-	int32_t src[N * 3];
-	for (unsigned i = 0; i < N; ++i)
-		src[i] = random24();
+	constexpr unsigned N = 256;
+	const auto src = TestDataBuffer<int32_t, N>(GlibRandomInt24());
 
 	uint8_t dest[N * 3];
-
-	pcm_pack_24(dest, src, src + N);
+	pcm_pack_24(dest, src.begin(), src.end());
 
 	for (unsigned i = 0; i < N; ++i) {
 		int32_t d;
@@ -67,14 +53,11 @@ test_pcm_pack_24()
 void
 test_pcm_unpack_24()
 {
-	enum { N = 256 };
-	uint8_t src[N * 3];
-	for (unsigned i = 0; i < G_N_ELEMENTS(src); ++i)
-		src[i] = g_random_int_range(0, 256);
+	constexpr unsigned N = 256;
+	const auto src = TestDataBuffer<uint8_t, N * 3>();
 
 	int32_t dest[N];
-
-	pcm_unpack_24(dest, src, src + G_N_ELEMENTS(src));
+	pcm_unpack_24(dest, src.begin(), src.end());
 
 	for (unsigned i = 0; i < N; ++i) {
 		int32_t s;
diff --git a/test/test_pcm_util.hxx b/test/test_pcm_util.hxx
new file mode 100644
index 000000000..c039d6560
--- /dev/null
+++ b/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();
+	}
+};
diff --git a/test/test_pcm_volume.cxx b/test/test_pcm_volume.cxx
index 4ec76e79c..1ab590490 100644
--- a/test/test_pcm_volume.cxx
+++ b/test/test_pcm_volume.cxx
@@ -19,33 +19,34 @@
 
 #include "test_pcm_all.hxx"
 #include "PcmVolume.hxx"
+#include "test_pcm_util.hxx"
 
 #include <glib.h>
 
+#include <algorithm>
+
 #include <string.h>
 
 void
 test_pcm_volume_8()
 {
-	enum { N = 256 };
+	constexpr unsigned N = 256;
 	static int8_t zero[N];
-	int8_t src[N];
-	for (unsigned i = 0; i < N; ++i)
-		src[i] = g_random_int();
+	const auto src = TestDataBuffer<int8_t, N>();
 
 	int8_t dest[N];
 
-	memcpy(dest, src, sizeof(src));
+	std::copy(src.begin(), src.end(), dest);
 	g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S8,
 				   0), ==, true);
 	g_assert_cmpint(memcmp(dest, zero, sizeof(zero)), ==, 0);
 
-	memcpy(dest, src, sizeof(src));
+	std::copy(src.begin(), src.end(), dest);
 	g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S8,
 				   PCM_VOLUME_1), ==, true);
 	g_assert_cmpint(memcmp(dest, src, sizeof(src)), ==, 0);
 
-	memcpy(dest, src, sizeof(src));
+	std::copy(src.begin(), src.end(), dest);
 	g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S8,
 				   PCM_VOLUME_1 / 2), ==, true);
 
@@ -58,25 +59,23 @@ test_pcm_volume_8()
 void
 test_pcm_volume_16()
 {
-	enum { N = 256 };
+	constexpr unsigned N = 256;
 	static int16_t zero[N];
-	int16_t src[N];
-	for (unsigned i = 0; i < N; ++i)
-		src[i] = g_random_int();
+	const auto src = TestDataBuffer<int16_t, N>();
 
 	int16_t dest[N];
 
-	memcpy(dest, src, sizeof(src));
+	std::copy(src.begin(), src.end(), dest);
 	g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S16,
 				   0), ==, true);
 	g_assert_cmpint(memcmp(dest, zero, sizeof(zero)), ==, 0);
 
-	memcpy(dest, src, sizeof(src));
+	std::copy(src.begin(), src.end(), dest);
 	g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S16,
 				   PCM_VOLUME_1), ==, true);
 	g_assert_cmpint(memcmp(dest, src, sizeof(src)), ==, 0);
 
-	memcpy(dest, src, sizeof(src));
+	std::copy(src.begin(), src.end(), dest);
 	g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S16,
 				   PCM_VOLUME_1 / 2), ==, true);
 
@@ -86,40 +85,26 @@ test_pcm_volume_16()
 	}
 }
 
-/**
- * Generate a random 24 bit PCM sample.
- */
-static int32_t
-random24()
-{
-	int32_t x = g_random_int() & 0xffffff;
-	if (x & 0x800000)
-		x |= 0xff000000;
-	return x;
-}
-
 void
 test_pcm_volume_24()
 {
-	enum { N = 256 };
+	constexpr unsigned N = 256;
 	static int32_t zero[N];
-	int32_t src[N];
-	for (unsigned i = 0; i < N; ++i)
-		src[i] = random24();
+	const auto src = TestDataBuffer<int32_t, N>(GlibRandomInt24());
 
 	int32_t dest[N];
 
-	memcpy(dest, src, sizeof(src));
+	std::copy(src.begin(), src.end(), dest);
 	g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S24_P32,
 				   0), ==, true);
 	g_assert_cmpint(memcmp(dest, zero, sizeof(zero)), ==, 0);
 
-	memcpy(dest, src, sizeof(src));
+	std::copy(src.begin(), src.end(), dest);
 	g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S24_P32,
 				   PCM_VOLUME_1), ==, true);
 	g_assert_cmpint(memcmp(dest, src, sizeof(src)), ==, 0);
 
-	memcpy(dest, src, sizeof(src));
+	std::copy(src.begin(), src.end(), dest);
 	g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S24_P32,
 				   PCM_VOLUME_1 / 2), ==, true);
 
@@ -132,25 +117,23 @@ test_pcm_volume_24()
 void
 test_pcm_volume_32()
 {
-	enum { N = 256 };
+	constexpr unsigned N = 256;
 	static int32_t zero[N];
-	int32_t src[N];
-	for (unsigned i = 0; i < N; ++i)
-		src[i] = g_random_int();
+	const auto src = TestDataBuffer<int32_t, N>();
 
 	int32_t dest[N];
 
-	memcpy(dest, src, sizeof(src));
+	std::copy(src.begin(), src.end(), dest);
 	g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S32,
 				   0), ==, true);
 	g_assert_cmpint(memcmp(dest, zero, sizeof(zero)), ==, 0);
 
-	memcpy(dest, src, sizeof(src));
+	std::copy(src.begin(), src.end(), dest);
 	g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S32,
 				   PCM_VOLUME_1), ==, true);
 	g_assert_cmpint(memcmp(dest, src, sizeof(src)), ==, 0);
 
-	memcpy(dest, src, sizeof(src));
+	std::copy(src.begin(), src.end(), dest);
 	g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S32,
 				   PCM_VOLUME_1 / 2), ==, true);
 
@@ -163,25 +146,23 @@ test_pcm_volume_32()
 void
 test_pcm_volume_float()
 {
-	enum { N = 256 };
+	constexpr unsigned N = 256;
 	static float zero[N];
-	float src[N];
-	for (unsigned i = 0; i < N; ++i)
-		src[i] = g_random_double_range(-1.0, 1.0);
+	const auto src = TestDataBuffer<float, N>(GlibRandomFloat());
 
 	float dest[N];
 
-	memcpy(dest, src, sizeof(src));
+	std::copy(src.begin(), src.end(), dest);
 	g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_FLOAT,
 				   0), ==, true);
 	g_assert_cmpint(memcmp(dest, zero, sizeof(zero)), ==, 0);
 
-	memcpy(dest, src, sizeof(src));
+	std::copy(src.begin(), src.end(), dest);
 	g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_FLOAT,
 				   PCM_VOLUME_1), ==, true);
 	g_assert_cmpint(memcmp(dest, src, sizeof(src)), ==, 0);
 
-	memcpy(dest, src, sizeof(src));
+	std::copy(src.begin(), src.end(), dest);
 	g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_FLOAT,
 				   PCM_VOLUME_1 / 2), ==, true);