git.cworth.org Git - scherzo/blob - pitch.h

   1 /* scherzo - Music notation training
   2  *
   3  *      pitch.h - Common structures and functions for pitches, etc.
   4  *
   5  * Copyright © 2010,2013 Carl Worth
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program.  If not, see http://www.gnu.org/licenses/ .
  19  */
  20
  21 #include <stdint.h>
  22
  23 #ifndef PITCH_H
  24 #define PITCH_H
  25
  26 #define PITCH_ACCIDENTAL_MASK 0x07
  27 #define PITCH_ACCIDENTAL_SHIFT 0
  28
  29 typedef enum pitch_accidental
  30 {
  31     PITCH_ACCIDENTAL_DOUBLE_FLAT,
  32     PITCH_ACCIDENTAL_FLAT,
  33     PITCH_ACCIDENTAL_NATURAL,
  34     PITCH_ACCIDENTAL_SHARP,
  35     PITCH_ACCIDENTAL_DOUBLE_SHARP
  36 } pitch_accidental_t;
  37
  38 #define PITCH_ACCIDENTAL(pitch) (((pitch) & PITCH_ACCIDENTAL_MASK) >> PITCH_ACCIDENTAL_SHIFT)
  39
  40 #define PITCH_NAME_MASK 0x38
  41 #define PITCH_NAME_SHIFT 3
  42
  43 typedef enum pitch_name
  44 {
  45     PITCH_NAME_C,
  46     PITCH_NAME_D,
  47     PITCH_NAME_E,
  48     PITCH_NAME_F,
  49     PITCH_NAME_G,
  50     PITCH_NAME_A,
  51     PITCH_NAME_B,
  52 } pitch_name_t;
  53
  54 #define PITCH_NAME(pitch) (((pitch) & PITCH_NAME_MASK) >> PITCH_NAME_SHIFT)
  55
  56 #define PITCH(name, accidental) (((name) << PITCH_NAME_SHIFT) | (accidental))
  57
  58 #define PITCH_LITERAL(literal_name, literal_accidental) PITCH(PITCH_NAME_##literal_name, PITCH_ACCIDENTAL_##literal_accidental)
  59 #define PITCH_NATURAL(literal_name) PITCH_LITERAL(literal_name, NATURAL)
  60
  61 typedef uint32_t pitch_t;
  62
  63 #endif /* PITCH_H */