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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 "pcm/Volume.hxx"
#include "pcm/Traits.hxx"
#include "util/ConstBuffer.hxx"
#include "test_pcm_util.hxx"
#include <gtest/gtest.h>
#include <algorithm>
#include <string.h>
template<SampleFormat F, class Traits=SampleTraits<F>,
typename G=RandomInt<typename Traits::value_type>>
static void
TestVolume(G g=G())
{
typedef typename Traits::value_type value_type;
PcmVolume pv;
pv.Open(F);
constexpr size_t N = 509;
static value_type zero[N];
const auto _src = TestDataBuffer<value_type, N>(g);
const ConstBuffer<void> src(_src, sizeof(_src));
pv.SetVolume(0);
auto dest = pv.Apply(src);
EXPECT_EQ(src.size, dest.size);
EXPECT_EQ(0, memcmp(dest.data, zero, sizeof(zero)));
pv.SetVolume(PCM_VOLUME_1);
dest = pv.Apply(src);
EXPECT_EQ(src.size, dest.size);
EXPECT_EQ(0, memcmp(dest.data, src.data, src.size));
pv.SetVolume(PCM_VOLUME_1 / 2);
dest = pv.Apply(src);
EXPECT_EQ(src.size, dest.size);
const auto _dest = ConstBuffer<value_type>::FromVoid(dest);
for (unsigned i = 0; i < N; ++i) {
const auto expected = (_src[i] + 1) / 2;
EXPECT_GE(_dest[i], expected - 4);
EXPECT_LE(_dest[i], expected + 4);
}
pv.Close();
}
TEST(PcmTest, Volume8)
{
TestVolume<SampleFormat::S8>();
}
TEST(PcmTest, Volume16)
{
TestVolume<SampleFormat::S16>();
}
TEST(PcmTest, Volume24)
{
TestVolume<SampleFormat::S24_P32>(RandomInt24());
}
TEST(PcmTest, Volume32)
{
TestVolume<SampleFormat::S32>();
}
TEST(PcmTest, VolumeFloat)
{
PcmVolume pv;
pv.Open(SampleFormat::FLOAT);
constexpr size_t N = 509;
static float zero[N];
const auto _src = TestDataBuffer<float, N>(RandomFloat());
const ConstBuffer<void> src(_src, sizeof(_src));
pv.SetVolume(0);
auto dest = pv.Apply(src);
EXPECT_EQ(src.size, dest.size);
EXPECT_EQ(0, memcmp(dest.data, zero, sizeof(zero)));
pv.SetVolume(PCM_VOLUME_1);
dest = pv.Apply(src);
EXPECT_EQ(src.size, dest.size);
EXPECT_EQ(0, memcmp(dest.data, src.data, src.size));
pv.SetVolume(PCM_VOLUME_1 / 2);
dest = pv.Apply(src);
EXPECT_EQ(src.size, dest.size);
const auto _dest = ConstBuffer<float>::FromVoid(dest);
for (unsigned i = 0; i < N; ++i)
EXPECT_NEAR(_src[i] / 2, _dest[i], 1);
pv.Close();
}
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