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MixHelpers: helper functions for mixing buffers

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Introduced central helper functions for mixing buffers in order to
reduce local loops all around LMMS.
This commit is contained in:
Tobias Doerffel
2014-01-08 21:50:43 +01:00
parent 6f7b6978bd
commit 4a99b953b5
2 changed files with 206 additions and 0 deletions
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include/MixHelpers.h Normal file
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/*
* MixHelpers.h - helper functions for mixing buffers
*
* Copyright (c) 2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
*
* This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
*
* 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 (see COPYING); if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA.
*
*/
#ifndef _MIX_HELPERS_H
#define _MIX_HELPERS_H
#include "lmms_basics.h"
namespace MixHelpers
{
/*! \brief Add samples from src to dst */
void add( sampleFrame* dst, const sampleFrame* src, int frames );
/*! \brief Add samples from src multiplied by coeffSrc to dst */
void addMultiplied( sampleFrame* dst, const sampleFrame* src, float coeffSrc, int frames );
/*! \brief Add samples from src multiplied by coeffSrcLeft/coeffSrcRight to dst */
void addMultipliedStereo( sampleFrame* dst, const sampleFrame* src, float coeffSrcLeft, float coeffSrcRight, int frames );
/*! \brief Multiply dst by coeffDst and add samples from src multiplied by coeffSrc */
void multiplyAndAddMultiplied( sampleFrame* dst, const sampleFrame* src, float coeffDst, float coeffSrc, int frames );
/*! \brief Multiply dst by coeffDst and add samples from srcLeft/srcRight multiplied by coeffSrc */
void multiplyAndAddMultipliedJoined( sampleFrame* dst, const sample_t* srcLeft, const sample_t* srcRight, float coeffDst, float coeffSrc, int frames );
}
#endif