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/*
* Copyright 2003-2018 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_util.hxx"
#include "pcm/PcmChannels.hxx"
#include "pcm/PcmBuffer.hxx"
#include "util/ConstBuffer.hxx"
#include <gtest/gtest.h>
TEST(PcmTest, Channels16)
{
constexpr size_t N = 509;
const auto src = TestDataBuffer<int16_t, N * 2>();
PcmBuffer buffer;
/* stereo to mono */
auto dest = pcm_convert_channels_16(buffer, 1, 2, { src, N * 2 });
EXPECT_FALSE(dest.IsNull());
EXPECT_EQ(N, dest.size);
for (unsigned i = 0; i < N; ++i)
EXPECT_EQ(int16_t((src[i * 2] + src[i * 2 + 1]) / 2),
dest[i]);
/* mono to stereo */
dest = pcm_convert_channels_16(buffer, 2, 1, { src, N * 2 });
EXPECT_FALSE(dest.IsNull());
EXPECT_EQ(N * 4, dest.size);
for (unsigned i = 0; i < N; ++i) {
EXPECT_EQ(src[i], dest[i * 2]);
EXPECT_EQ(src[i], dest[i * 2 + 1]);
}
/* stereo to 5.1 */
dest = pcm_convert_channels_16(buffer, 6, 2, { src, N * 2 });
EXPECT_FALSE(dest.IsNull());
EXPECT_EQ(N * 6, dest.size);
constexpr int16_t silence = 0;
for (unsigned i = 0; i < N; ++i) {
EXPECT_EQ(src[i * 2], dest[i * 6]);
EXPECT_EQ(src[i * 2 + 1], dest[i * 6+ 1]);
EXPECT_EQ(silence, dest[i * 6 + 2]);
EXPECT_EQ(silence, dest[i * 6 + 3]);
EXPECT_EQ(silence, dest[i * 6 + 4]);
EXPECT_EQ(silence, dest[i * 6 + 5]);
}
}
TEST(PcmTest, Channels32)
{
constexpr size_t N = 509;
const auto src = TestDataBuffer<int32_t, N * 2>();
PcmBuffer buffer;
/* stereo to mono */
auto dest = pcm_convert_channels_32(buffer, 1, 2, { src, N * 2 });
EXPECT_FALSE(dest.IsNull());
EXPECT_EQ(N, dest.size);
for (unsigned i = 0; i < N; ++i)
EXPECT_EQ(int32_t(((int64_t)src[i * 2] + (int64_t)src[i * 2 + 1]) / 2),
dest[i]);
/* mono to stereo */
dest = pcm_convert_channels_32(buffer, 2, 1, { src, N * 2 });
EXPECT_FALSE(dest.IsNull());
EXPECT_EQ(N * 4, dest.size);
for (unsigned i = 0; i < N; ++i) {
EXPECT_EQ(src[i], dest[i * 2]);
EXPECT_EQ(src[i], dest[i * 2 + 1]);
}
/* stereo to 5.1 */
dest = pcm_convert_channels_32(buffer, 6, 2, { src, N * 2 });
EXPECT_FALSE(dest.IsNull());
EXPECT_EQ(N * 6, dest.size);
constexpr int32_t silence = 0;
for (unsigned i = 0; i < N; ++i) {
EXPECT_EQ(src[i * 2], dest[i * 6]);
EXPECT_EQ(src[i * 2 + 1], dest[i * 6+ 1]);
EXPECT_EQ(silence, dest[i * 6 + 2]);
EXPECT_EQ(silence, dest[i * 6 + 3]);
EXPECT_EQ(silence, dest[i * 6 + 4]);
EXPECT_EQ(silence, dest[i * 6 + 5]);
}
}
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