test: add unit test for the PCM library

1 files changed, 100 insertions, 0 deletions

diff --git a/test/test_pcm_channels.c b/test/test_pcm_channels.c
new file mode 100644
index 000000000..c974c7b1b
--- /dev/null
+++ b/test/test_pcm_channels.c
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2003-2011 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 "test_pcm_all.h"
+#include "pcm_channels.h"
+#include "pcm_buffer.h"
+
+#include <glib.h>
+
+void
+test_pcm_channels_16(void)
+{
+	enum { N = 256 };
+	int16_t src[N * 2];
+
+	for (unsigned i = 0; i < G_N_ELEMENTS(src); ++i)
+		src[i] = g_random_int();
+
+	struct pcm_buffer buffer;
+	pcm_buffer_init(&buffer);
+
+	/* stereo to mono */
+
+	size_t dest_size;
+	const int16_t *dest =
+		pcm_convert_channels_16(&buffer, 1, 2, src, sizeof(src),
+					&dest_size);
+	g_assert(dest != NULL);
+	g_assert_cmpint(dest_size, ==, sizeof(src) / 2);
+	for (unsigned i = 0; i < N; ++i)
+		g_assert_cmpint(dest[i], ==,
+				(src[i * 2] + src[i * 2 + 1]) / 2);
+
+	/* mono to stereo */
+
+	dest = pcm_convert_channels_16(&buffer, 2, 1, src, sizeof(src),
+				       &dest_size);
+	g_assert(dest != NULL);
+	g_assert_cmpint(dest_size, ==, sizeof(src) * 2);
+	for (unsigned i = 0; i < N; ++i) {
+		g_assert_cmpint(dest[i * 2], ==, src[i]);
+		g_assert_cmpint(dest[i * 2 + 1], ==, src[i]);
+	}
+
+	pcm_buffer_deinit(&buffer);
+}
+
+void
+test_pcm_channels_32(void)
+{
+	enum { N = 256 };
+	int32_t src[N * 2];
+
+	for (unsigned i = 0; i < G_N_ELEMENTS(src); ++i)
+		src[i] = g_random_int();
+
+	struct pcm_buffer buffer;
+	pcm_buffer_init(&buffer);
+
+	/* stereo to mono */
+
+	size_t dest_size;
+	const int32_t *dest =
+		pcm_convert_channels_32(&buffer, 1, 2, src, sizeof(src),
+					&dest_size);
+	g_assert(dest != NULL);
+	g_assert_cmpint(dest_size, ==, sizeof(src) / 2);
+	for (unsigned i = 0; i < N; ++i)
+		g_assert_cmpint(dest[i], ==,
+				((int64_t)src[i * 2] + (int64_t)src[i * 2 + 1]) / 2);
+
+	/* mono to stereo */
+
+	dest = pcm_convert_channels_32(&buffer, 2, 1, src, sizeof(src),
+				       &dest_size);
+	g_assert(dest != NULL);
+	g_assert_cmpint(dest_size, ==, sizeof(src) * 2);
+	for (unsigned i = 0; i < N; ++i) {
+		g_assert_cmpint(dest[i * 2], ==, src[i]);
+		g_assert_cmpint(dest[i * 2 + 1], ==, src[i]);
+	}
+
+	pcm_buffer_deinit(&buffer);
+}