include/panning.h

   1 /*
   2  * panning.h - declaration of some types, concerning the
   3  *             panning of a note
   4  *
   5  * Copyright (c) 2004-2009 Tobias Doerffel <tobydox/at/users.sourceforge.net>
   6  *
   7  * This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2 of the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public
  20  * License along with this program (see COPYING); if not, write to the
  21  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  22  * Boston, MA 02110-1301 USA.
  23  *
  24  */
  25
  26 #ifndef _PANNING_H
  27 #define _PANNING_H
  28
  29 #include "lmms_basics.h"
  30 #include "volume.h"
  31 #include "templates.h"
  32 #include "panning_constants.h"
  33 #include "midi.h"
  34
  35 inline stereoVolumeVector panningToVolumeVector( panning_t _p,
  36                                                         float _scale = 1.0f )
  37 {
  38         stereoVolumeVector v = { { _scale, _scale } };
  39         const float pf = _p / 100.0f;
  40         v.vol[_p >= PanningCenter ? 0 : 1] *= 1.0f - qAbs<float>( pf );
  41         return v;
  42 }
  43
  44
  45 inline int panningToMidi( panning_t _p )
  46 {
  47         return MidiMinPanning + (int) (
  48                           ( (float)( _p - PanningLeft ) ) /
  49                           ( (float)( PanningRight - PanningLeft ) ) *
  50                           ( (float)( MidiMaxPanning - MidiMinPanning ) ) );
  51 }
  52
  53 #endif