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// SPDX-License-Identifier: GPL-2.0-or-later
// Copyright The Music Player Daemon Project
#include "test_pcm_util.hxx"
#include "pcm/PcmFormat.hxx"
#include "pcm/Dither.hxx"
#include "pcm/Buffer.hxx"
#include "pcm/SampleFormat.hxx"
#include <gtest/gtest.h>
TEST(PcmTest, Format8To16)
{
constexpr size_t N = 509;
const auto src = TestDataBuffer<int8_t, N>();
PcmBuffer buffer;
PcmDither dither;
auto d = pcm_convert_to_16(buffer, dither, SampleFormat::S8, src);
EXPECT_EQ(N, d.size());
for (size_t i = 0; i < N; ++i)
EXPECT_EQ(int(src[i]), d[i] >> 8);
}
TEST(PcmTest, Format16To24)
{
constexpr size_t N = 509;
const auto src = TestDataBuffer<int16_t, N>();
PcmBuffer buffer;
auto d = pcm_convert_to_24(buffer, SampleFormat::S16, src);
EXPECT_EQ(N, d.size());
for (size_t i = 0; i < N; ++i)
EXPECT_EQ(int(src[i]), d[i] >> 8);
}
TEST(PcmTest, Format16To32)
{
constexpr size_t N = 509;
const auto src = TestDataBuffer<int16_t, N>();
PcmBuffer buffer;
auto d = pcm_convert_to_32(buffer, SampleFormat::S16, src);
EXPECT_EQ(N, d.size());
for (size_t i = 0; i < N; ++i)
EXPECT_EQ(int(src[i]), d[i] >> 16);
}
TEST(PcmTest, FormatFloat16)
{
constexpr size_t N = 509;
const auto src = TestDataBuffer<int16_t, N>();
PcmBuffer buffer1, buffer2;
auto f = pcm_convert_to_float(buffer1, SampleFormat::S16, src);
EXPECT_EQ(N, f.size());
for (size_t i = 0; i != f.size(); ++i) {
EXPECT_GE(f[i], -1.f);
EXPECT_LE(f[i], 1.f);
}
PcmDither dither;
auto d = pcm_convert_to_16(buffer2, dither,
SampleFormat::FLOAT,
std::as_bytes(f));
EXPECT_EQ(N, d.size());
for (size_t i = 0; i < N; ++i)
EXPECT_EQ(src[i], d[i]);
/* check if clamping works */
auto *writable = const_cast<float *>(f.data());
*writable++ = 1.01;
*writable++ = 10;
*writable++ = -1.01;
*writable++ = -10;
d = pcm_convert_to_16(buffer2, dither,
SampleFormat::FLOAT,
std::as_bytes(f));
EXPECT_EQ(N, d.size());
EXPECT_EQ(32767, int(d[0]));
EXPECT_EQ(32767, int(d[1]));
EXPECT_EQ(-32768, int(d[2]));
EXPECT_EQ(-32768, int(d[3]));
for (size_t i = 4; i < N; ++i)
EXPECT_EQ(src[i], d[i]);
}
TEST(PcmTest, FormatFloat32)
{
constexpr size_t N = 509;
const auto src = TestDataBuffer<int32_t, N>();
PcmBuffer buffer1, buffer2;
auto f = pcm_convert_to_float(buffer1, SampleFormat::S32, src);
EXPECT_EQ(N, f.size());
for (size_t i = 0; i != f.size(); ++i) {
EXPECT_GE(f[i], -1.f);
EXPECT_LE(f[i], 1.f);
}
auto d = pcm_convert_to_32(buffer2,
SampleFormat::FLOAT,
std::as_bytes(f));
EXPECT_EQ(N, d.size());
constexpr int error = 64;
for (size_t i = 0; i < N; ++i)
EXPECT_NEAR(src[i], d[i], error);
/* check if clamping works */
auto *writable = const_cast<float *>(f.data());
*writable++ = 1.01;
*writable++ = 10;
*writable++ = -1.01;
*writable++ = -10;
d = pcm_convert_to_32(buffer2,
SampleFormat::FLOAT,
std::as_bytes(f));
EXPECT_EQ(N, d.size());
EXPECT_EQ(2147483647, int(d[0]));
EXPECT_EQ(2147483647, int(d[1]));
EXPECT_EQ(-2147483648, int(d[2]));
EXPECT_EQ(-2147483648, int(d[3]));
for (size_t i = 4; i < N; ++i)
EXPECT_NEAR(src[i], d[i], error);
}
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