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/*
* Copyright 2003-2019 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_util.hxx"
#include "pcm/Mix.hxx"
#include "pcm/Dither.hxx"
#include <gtest/gtest.h>
template<typename T, SampleFormat format, typename G=RandomInt<T>>
static void
TestPcmMix(G g=G())
{
constexpr unsigned N = 509;
const auto src1 = TestDataBuffer<T, N>(g);
const auto src2 = TestDataBuffer<T, N>(g);
PcmDither dither;
/* portion1=1.0: result must be equal to src1 */
auto result = src1;
bool success = pcm_mix(dither,
result.begin(), src2.begin(), sizeof(result),
format, 1.0);
ASSERT_TRUE(success);
AssertEqualWithTolerance(result, src1, 3);
/* portion1=0.0: result must be equal to src2 */
result = src1;
success = pcm_mix(dither, result.begin(), src2.begin(), sizeof(result),
format, 0.0);
ASSERT_TRUE(success);
AssertEqualWithTolerance(result, src2, 3);
/* portion1=0.5 */
result = src1;
success = pcm_mix(dither, result.begin(), src2.begin(), sizeof(result),
format, 0.5);
ASSERT_TRUE(success);
auto expected = src1;
for (unsigned i = 0; i < N; ++i)
expected[i] = (int64_t(src1[i]) + int64_t(src2[i])) / 2;
for (unsigned i = 0; i < N; ++i)
EXPECT_NEAR(result[i], expected[i], 3);
}
TEST(PcmTest, Mix8)
{
TestPcmMix<int8_t, SampleFormat::S8>();
}
TEST(PcmTest, Mix16)
{
TestPcmMix<int16_t, SampleFormat::S16>();
}
TEST(PcmTest, Mix24)
{
TestPcmMix<int32_t, SampleFormat::S24_P32>(RandomInt24());
}
TEST(PcmTest, Mix32)
{
TestPcmMix<int32_t, SampleFormat::S32>();
}
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