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38 lines
823 B
C++
38 lines
823 B
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright The Music Player Daemon Project
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#include "test_pcm_util.hxx"
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#include "pcm/Dither.cxx"
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#include <gtest/gtest.h>
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TEST(PcmTest, Dither24)
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{
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constexpr unsigned N = 509;
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const auto src = TestDataBuffer<int32_t, N>(RandomInt24());
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int16_t dest[N];
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PcmDither dither;
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dither.Dither24To16(dest, src.begin(), src.end());
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for (unsigned i = 0; i < N; ++i) {
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EXPECT_GE(dest[i], (src[i] >> 8) - 8);
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EXPECT_LT(dest[i], (src[i] >> 8) + 8);
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}
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}
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TEST(PcmTest, Dither32)
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{
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constexpr unsigned N = 509;
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const auto src = TestDataBuffer<int32_t, N>();
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int16_t dest[N];
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PcmDither dither;
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dither.Dither32To16(dest, src.begin(), src.end());
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for (unsigned i = 0; i < N; ++i) {
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EXPECT_GE(dest[i], (src[i] >> 16) - 8);
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EXPECT_LT(dest[i], (src[i] >> 16) + 8);
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}
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}
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