andrewm@0: /*
andrewm@0:   TouchKeys: multi-touch musical keyboard control software
andrewm@0:   Copyright (c) 2013 Andrew McPherson
andrewm@0: 
andrewm@0:   This program is free software: you can redistribute it and/or modify
andrewm@0:   it under the terms of the GNU General Public License as published by
andrewm@0:   the Free Software Foundation, either version 3 of the License, or
andrewm@0:   (at your option) any later version.
andrewm@0:  
andrewm@0:   This program is distributed in the hope that it will be useful,
andrewm@0:   but WITHOUT ANY WARRANTY; without even the implied warranty of
andrewm@0:   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
andrewm@0:   GNU General Public License for more details.
andrewm@0: 
andrewm@0:   You should have received a copy of the GNU General Public License
andrewm@0:   along with this program.  If not, see <http://www.gnu.org/licenses/>.
andrewm@0:  
andrewm@0:   =====================================================================
andrewm@0:  
andrewm@0:   PianoTypes.h: some useful constants mainly relevant to continuous key angle
andrewm@0: */
andrewm@0: 
andrewm@0: #ifndef KEYCONTROL_PIANO_TYPES_H
andrewm@0: #define KEYCONTROL_PIANO_TYPES_H
andrewm@0: 
andrewm@0: #include "../Utility/Types.h"
andrewm@0: 
andrewm@0: #undef FIXED_POINT_PIANO_SAMPLES
andrewm@0: 
andrewm@0: // Data types.  Allow for floating-point (more flexible) or fixed-point (faster) arithmetic
andrewm@0: // on piano key positions
andrewm@0: #ifdef FIXED_POINT_PIANO_SAMPLES
andrewm@0: typedef int key_position;
andrewm@0: typedef int key_velocity;
andrewm@0: #define scale_key_position(x) 4096*(key_position)(x)
andrewm@0: #define key_position_to_float(x) ((float)x/4096.0)
andrewm@0: #define key_abs(x) abs(x)
andrewm@0: #define calculate_key_velocity(dpos, dt) (key_velocity)((65536*dpos)/(key_position)dt)
andrewm@0: #define scale_key_velocity(x) (65536/4096)*(key_velocity)(x) // FIXME: TEST THIS!
andrewm@0: #else
andrewm@0: typedef float key_position;
andrewm@0: typedef float key_velocity;
andrewm@0: #define scale_key_position(x) (key_position)(x)
andrewm@0: #define key_position_to_float(x) (x)
andrewm@0: #define key_abs(x) fabsf(x)
andrewm@0: #define calculate_key_velocity(dpos, dt) (key_velocity)(dpos/(key_position)dt)
andrewm@0: #define scale_key_velocity(x) (key_velocity)(x)
andrewm@0: #endif /* FIXED_POINT_PIANO_SAMPLES */
andrewm@0: 
andrewm@0: #endif /* KEYCONTROL_PIANO_TYPES_H */