0aee49bdf8
This updates the copyright header to all be the same, which is pretty much an update of where to mail request for a copy of the GPL and the years of the MPD project. This also puts all committers under 'The Music Player Project' umbrella. These entries should go individually in the AUTHORS file, for consistancy.
45 lines
1.5 KiB
C
45 lines
1.5 KiB
C
/*
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* Copyright (C) 2003-2009 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 PCM_MIX_H
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#define PCM_MIX_H
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#include <stddef.h>
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struct audio_format;
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/*
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* Linearly mixes two PCM buffers. Both must have the same length and
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* the same audio format. The formula is:
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*
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* s1 := s1 * portion1 + s2 * (1 - portion1)
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*
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* @param buffer1 the first PCM buffer, and the destination buffer
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* @param buffer2 the second PCM buffer
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* @param size the size of both buffers in bytes
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* @param format the audio format of both buffers
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* @param portion1 a number between 0.0 and 1.0 specifying the portion
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* of the first buffer in the mix; portion2 = (1.0 - portion1)
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*/
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void
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pcm_mix(void *buffer1, const void *buffer2, size_t size,
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const struct audio_format *format, float portion1);
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#endif
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