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Diffstat (limited to 'test/test_pcm_dither.c')
-rw-r--r-- | test/test_pcm_dither.c | 79 |
1 files changed, 0 insertions, 79 deletions
diff --git a/test/test_pcm_dither.c b/test/test_pcm_dither.c deleted file mode 100644 index 44d105207..000000000 --- a/test/test_pcm_dither.c +++ /dev/null @@ -1,79 +0,0 @@ -/* - * Copyright (C) 2003-2011 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.h" -#include "pcm_dither.h" - -#include <glib.h> - -/** - * Generate a random 24 bit PCM sample. - */ -static int32_t -random24(void) -{ - int32_t x = g_random_int() & 0xffffff; - if (x & 0x800000) - x |= 0xff000000; - return x; -} - -void -test_pcm_dither_24(void) -{ - struct pcm_dither dither; - - pcm_dither_24_init(&dither); - - enum { N = 256 }; - int32_t src[N]; - for (unsigned i = 0; i < N; ++i) - src[i] = random24(); - - int16_t dest[N]; - - pcm_dither_24_to_16(&dither, dest, src, src + N); - - 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(void) -{ - struct pcm_dither dither; - - pcm_dither_24_init(&dither); - - enum { N = 256 }; - int32_t src[N]; - for (unsigned i = 0; i < N; ++i) - src[i] = g_random_int(); - - int16_t dest[N]; - - pcm_dither_32_to_16(&dither, dest, src, src + N); - - 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); - } -} |