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Diffstat (limited to '')
-rw-r--r-- | src/PcmDither.hxx | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/PcmDither.hxx b/src/PcmDither.hxx new file mode 100644 index 000000000..106382307 --- /dev/null +++ b/src/PcmDither.hxx @@ -0,0 +1,44 @@ +/* + * 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. + */ + +#ifndef MPD_PCM_DITHER_HXX +#define MPD_PCM_DITHER_HXX + +#include <stdint.h> + +class PcmDither { + int32_t error[3]; + int32_t random; + +public: + constexpr PcmDither() + :error{0, 0, 0}, random(0) {} + + void Dither24To16(int16_t *dest, const int32_t *src, + const int32_t *src_end); + + void Dither32To16(int16_t *dest, const int32_t *src, + const int32_t *src_end); + +private: + int16_t Dither24To16(int_fast32_t sample); + int16_t Dither32To16(int_fast32_t sample); +}; + +#endif |