48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
/*
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* Copyright (C) 2003-2011 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPD_PCM_DITHER_H
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#define MPD_PCM_DITHER_H
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#include <stdint.h>
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struct pcm_dither {
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int32_t error[3];
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int32_t random;
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};
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static inline void
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pcm_dither_24_init(struct pcm_dither *dither)
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{
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dither->error[0] = dither->error[1] = dither->error[2] = 0;
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dither->random = 0;
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}
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void
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pcm_dither_24_to_16(struct pcm_dither *dither,
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int16_t *dest, const int32_t *src,
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unsigned num_samples);
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void
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pcm_dither_32_to_16(struct pcm_dither *dither,
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int16_t *dest, const int32_t *src,
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unsigned num_samples);
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#endif
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