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Diffstat (limited to 'test/test_pcm_dither.cxx')
| -rw-r--r-- | test/test_pcm_dither.cxx | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/test/test_pcm_dither.cxx b/test/test_pcm_dither.cxx new file mode 100644 index 00000000..2fb976db --- /dev/null +++ b/test/test_pcm_dither.cxx @@ -0,0 +1,56 @@ +/* + * Copyright (C) 2003-2013 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_all.hxx" +#include "test_pcm_util.hxx" +#include "PcmDither.hxx" + +#include <glib.h> + +void +test_pcm_dither_24() +{ + constexpr unsigned N = 256; + const auto src = TestDataBuffer<int32_t, N>(GlibRandomInt24()); + + int16_t dest[N]; + PcmDither dither; + dither.Dither24To16(dest, src.begin(), src.end()); + + for (unsigned i = 0; i < N; ++i) { + g_assert_cmpint(dest[i], >=, (src[i] >> 8) - 8); + g_assert_cmpint(dest[i], <, (src[i] >> 8) + 8); + } +} + +void +test_pcm_dither_32() +{ + constexpr unsigned N = 256; + const auto src = TestDataBuffer<int32_t, N>(); + + int16_t dest[N]; + PcmDither dither; + dither.Dither32To16(dest, src.begin(), src.end()); + + for (unsigned i = 0; i < N; ++i) { + g_assert_cmpint(dest[i], >=, (src[i] >> 16) - 8); + g_assert_cmpint(dest[i], <, (src[i] >> 16) + 8); + } +} |