test/test_pcm: add unit tests for the PcmFormat library

Makefile.am

@@ -1405,6 +1405,7 @@ test_test_pcm_SOURCES = \
 	test/test_pcm_dither.cxx \
 	test/test_pcm_pack.cxx \
 	test/test_pcm_channels.cxx \
+	test/test_pcm_format.cxx \
 	test/test_pcm_volume.cxx \
 	test/test_pcm_all.hxx \
 	test/test_pcm_main.cxx

test/test_pcm_all.hxx

@@ -53,4 +53,16 @@ test_pcm_volume_32();
 void
 test_pcm_volume_float();
 
+void
+test_pcm_format_8_to_16();
+
+void
+test_pcm_format_16_to_24();
+
+void
+test_pcm_format_16_to_32();
+
+void
+test_pcm_format_float();
+
 #endif

test/test_pcm_format.cxx

@@ -0,0 +1,130 @@
+/*
+ * 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 "config.h"
+#include "test_pcm_all.hxx"
+#include "test_pcm_util.hxx"
+#include "PcmFormat.hxx"
+#include "PcmDither.hxx"
+#include "PcmUtils.hxx"
+#include "pcm_buffer.h"
+#include "audio_format.h"
+
+#include <glib.h>
+
+void
+test_pcm_format_8_to_16()
+{
+	constexpr unsigned N = 256;
+	const auto src = TestDataBuffer<int8_t, N>();
+
+	struct pcm_buffer buffer;
+	pcm_buffer_init(&buffer);
+
+	size_t d_size;
+	PcmDither dither;
+	auto d = pcm_convert_to_16(&buffer, dither, SAMPLE_FORMAT_S8,
+				   src, sizeof(src), &d_size);
+	auto d_end = pcm_end_pointer(d, d_size);
+	g_assert_cmpint(d_end - d, ==, N);
+
+	for (size_t i = 0; i < N; ++i)
+		g_assert_cmpint(src[i], ==, d[i] >> 8);
+
+	pcm_buffer_deinit(&buffer);
+}
+
+void
+test_pcm_format_16_to_24()
+{
+	constexpr unsigned N = 256;
+	const auto src = TestDataBuffer<int16_t, N>();
+
+	struct pcm_buffer buffer;
+	pcm_buffer_init(&buffer);
+
+	size_t d_size;
+	auto d = pcm_convert_to_24(&buffer, SAMPLE_FORMAT_S16,
+				   src, sizeof(src), &d_size);
+	auto d_end = pcm_end_pointer(d, d_size);
+	g_assert_cmpint(d_end - d, ==, N);
+
+	for (size_t i = 0; i < N; ++i)
+		g_assert_cmpint(src[i], ==, d[i] >> 8);
+
+	pcm_buffer_deinit(&buffer);
+}
+
+void
+test_pcm_format_16_to_32()
+{
+	constexpr unsigned N = 256;
+	const auto src = TestDataBuffer<int16_t, N>();
+
+	struct pcm_buffer buffer;
+	pcm_buffer_init(&buffer);
+
+	size_t d_size;
+	auto d = pcm_convert_to_32(&buffer, SAMPLE_FORMAT_S16,
+				   src, sizeof(src), &d_size);
+	auto d_end = pcm_end_pointer(d, d_size);
+	g_assert_cmpint(d_end - d, ==, N);
+
+	for (size_t i = 0; i < N; ++i)
+		g_assert_cmpint(src[i], ==, d[i] >> 16);
+
+	pcm_buffer_deinit(&buffer);
+}
+
+void
+test_pcm_format_float()
+{
+	constexpr unsigned N = 256;
+	const auto src = TestDataBuffer<int16_t, N>();
+
+	struct pcm_buffer buffer1, buffer2;
+	pcm_buffer_init(&buffer1);
+	pcm_buffer_init(&buffer2);
+
+	size_t f_size;
+	auto f = pcm_convert_to_float(&buffer1, SAMPLE_FORMAT_S16,
+				      src, sizeof(src), &f_size);
+	auto f_end = pcm_end_pointer(f, f_size);
+	g_assert_cmpint(f_end - f, ==, N);
+
+	for (auto i = f; i != f_end; ++i) {
+		g_assert(*i >= -1.);
+		g_assert(*i <= 1.);
+	}
+
+	PcmDither dither;
+
+	size_t d_size;
+	auto d = pcm_convert_to_16(&buffer2, dither,
+				   SAMPLE_FORMAT_FLOAT,
+				   f, f_size, &d_size);
+	auto d_end = pcm_end_pointer(d, d_size);
+	g_assert_cmpint(d_end - d, ==, N);
+
+	for (size_t i = 0; i < N; ++i)
+		g_assert_cmpint(src[i], ==, d[i]);
+
+	pcm_buffer_deinit(&buffer1);
+	pcm_buffer_deinit(&buffer2);
+}

test/test_pcm_main.cxx

@@ -38,5 +38,10 @@ main(int argc, char **argv)
 	g_test_add_func("/pcm/volume/32", test_pcm_volume_32);
 	g_test_add_func("/pcm/volume/float", test_pcm_volume_float);
 
+	g_test_add_func("/pcm/format/8_to_16", test_pcm_format_8_to_16);
+	g_test_add_func("/pcm/format/16_to_24", test_pcm_format_16_to_24);
+	g_test_add_func("/pcm/format/16_to_32", test_pcm_format_16_to_32);
+	g_test_add_func("/pcm/format/float", test_pcm_format_float);
+
 	g_test_run();
 }