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cd1109be8b
Corrected seg fault in vibed deconstructor. Add harmonic to vibed save and restore presets. Corrected load and save seg fault when using gimp like windows. Corrected big endian alsa driver. Changed parameters in single precision trig functions to use single precision PI. Modified Files: ChangeLog Makefile.am data/presets/AudioFileProcessor/Bass-Mania.cs.xml data/presets/AudioFileProcessor/Fat-Reversed-Kick.cs.xml data/presets/AudioFileProcessor/Kick-4-your-Subwoofer.cs.xml data/projects/cool_songs/Djeezus-BeatRolls.mmp data/projects/cool_songs/Djeezus-Oscilisous.mmp data/projects/cool_songs/Marfil-MarfilDrum01.mmp data/projects/cool_songs/Mart-Concave_flow.mmp data/projects/cool_songs/Mart-Dirt_Track.mmp data/projects/cool_songs/MaxFellner-Ease.mmp data/projects/cool_songs/SharkyX-DeadManDancing.mmp data/projects/cool_songs/SharkyX-Experiments.mmp data/projects/cool_songs/Siegel-DreamWave.mmp data/projects/cool_songs/TobyDox-Confused.mmp data/projects/cool_songs/TobyDox-Psycho.mmp data/projects/cool_songs/TobyDox-TheFourthDimension.mmp data/projects/covers/J.S.Bach-Preludium_and_Fugue_A-Minor.mmp data/projects/demos/basses-demo.mmp data/projects/demos/beat_collection.mmp data/projects/demos/demo1.mmp data/projects/demos/demo3.mmp data/projects/demos/demo5.mmp data/projects/demos/demo6.mmp data/projects/demos/loop_collection.mmp data/projects/demos/some_basslines.mmp data/projects/misc/1st.mmp data/projects/misc/time_machine.mmp data/projects/templates/AcousticDrumset.mpt data/projects/templates/ClubMix.mpt include/basic_filters.h include/interpolation.h include/oscillator.h plugins/vibed/nine_button_selector.cpp plugins/vibed/nine_button_selector.h plugins/vibed/vibed.cpp plugins/vibed/vibed.h src/audio/audio_alsa.cpp src/audio/audio_device.cpp src/audio/audio_file_wave.cpp src/core/main_window.cpp include/lmms_constants.h git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@126 0778d3d1-df1d-0410-868b-ea421aaaa00d
95 lines
2.3 KiB
C
95 lines
2.3 KiB
C
/*
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* interpolation.h - fast implementations of several interpolation-algorithms
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*
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* Copyright (c) 2004-2005 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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*
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* This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (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 GNU
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* 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
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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*/
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#ifndef _INTERPOLATION_H
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#define _INTERPOLATION_H
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#ifndef __USE_XOPEN
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#define __USE_XOPEN
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#endif
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#include <math.h>
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#include "lmms_constants.h"
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inline float hermiteInterpolate( float x0, float x1, float x2, float x3,
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float frac_pos )
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{
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const float frsq = frac_pos*frac_pos;
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const float frsq2 = 2*frsq;
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return( ( (x2-x0) *0.5f ) * ( frac_pos * (frsq+1) -frsq2 ) +
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( frsq2*frac_pos - 3*frsq ) * ( x1-x2 ) +
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frsq2 * (frac_pos-1) * ( ( x3-x1 ) * 0.25f ) + x1 );
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/*
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const float frsq = frac_pos*frac_pos;
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//const float frsq2 = 2*frsq;
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frac_pos *= 0.5;
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const float frcu = frsq*frac_pos;
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return (
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(frcu - frsq + frac_pos) * ((x2 - x0)) +
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(4*frcu - 3*frsq) * (x1 - x2)
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//frsq*(2*frac_pos-3) * (x1 - x2)
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+ (frcu - 0.5*frsq)*((x3 - x1))
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+ x1
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);
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*/
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}
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inline float cubicInterpolate( float v0, float v1, float v2, float v3, float x )
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{
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float frsq = x*x;
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float frcu = frsq*v0;
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float t1 = v3 + 3*v1;
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return( v1 + 0.5f * frcu + x * ( v2 - frcu * ( 1.0f/6.0f ) -
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t1 * ( 1.0f/6.0f ) - v0 / 3.0f ) + frsq * x * ( t1 *
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( 1.0f/6.0f ) - 0.5f * v2 ) + frsq * ( 0.5f * v2 - v1 ) );
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}
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inline float cosinusInterpolate( float v0, float v1, float x )
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{
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float f = cosf( x * ( F_PI_2 ) );
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return( v0*f + v1*( 1.0f-f ) );
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}
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inline float linearInterpolate( float v0, float v1, float x )
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{
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return( v0*( 1.0f-x ) + v1*x );
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}
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#endif
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