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1 /*
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2 TouchKeys: multi-touch musical keyboard control software
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3 Copyright (c) 2013 Andrew McPherson
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4
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation, either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program. If not, see <http://www.gnu.org/licenses/>.
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17
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18 =====================================================================
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19
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20 PianoTypes.h: some useful constants mainly relevant to continuous key angle
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21 */
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22
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23 #ifndef KEYCONTROL_PIANO_TYPES_H
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24 #define KEYCONTROL_PIANO_TYPES_H
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25
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26 #include "../Utility/Types.h"
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27
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28 #undef FIXED_POINT_PIANO_SAMPLES
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29
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30 // Data types. Allow for floating-point (more flexible) or fixed-point (faster) arithmetic
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31 // on piano key positions
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32 #ifdef FIXED_POINT_PIANO_SAMPLES
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33 typedef int key_position;
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34 typedef int key_velocity;
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35 #define scale_key_position(x) 4096*(key_position)(x)
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36 #define key_position_to_float(x) ((float)x/4096.0)
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37 #define key_abs(x) abs(x)
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38 #define calculate_key_velocity(dpos, dt) (key_velocity)((65536*dpos)/(key_position)dt)
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39 #define scale_key_velocity(x) (65536/4096)*(key_velocity)(x) // FIXME: TEST THIS!
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40 #else
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41 typedef float key_position;
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42 typedef float key_velocity;
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43 #define scale_key_position(x) (key_position)(x)
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44 #define key_position_to_float(x) (x)
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45 #define key_abs(x) fabsf(x)
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46 #define calculate_key_velocity(dpos, dt) (key_velocity)(dpos/(key_position)dt)
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47 #define scale_key_velocity(x) (key_velocity)(x)
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48 #endif /* FIXED_POINT_PIANO_SAMPLES */
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49
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50 #endif /* KEYCONTROL_PIANO_TYPES_H */ |
