diff options
Diffstat (limited to 'include/shared')
| -rw-r--r-- | include/shared/avl_tree.h.gch | bin | 0 -> 11451 bytes | |||
| -rw-r--r-- | include/shared/math.h | 19 |
2 files changed, 19 insertions, 0 deletions
diff --git a/include/shared/avl_tree.h.gch b/include/shared/avl_tree.h.gch Binary files differnew file mode 100644 index 0000000..78fc043 --- /dev/null +++ b/include/shared/avl_tree.h.gch diff --git a/include/shared/math.h b/include/shared/math.h new file mode 100644 index 0000000..6aec0e7 --- /dev/null +++ b/include/shared/math.h @@ -0,0 +1,19 @@ +#ifndef _SHARED_MATH_H_ +#define _SHARED_MATH_H_ + +#include "kern/common.h" + +/* Returns round(sin(2πn / 256) * 127.5 + 127.5). */ +uint8_t byte_sin(uint8_t n); + +static inline uint8_t byte_scale(uint8_t n, uint8_t sc) { + return n * sc / 255; +} + +#define min(a, b) (a) < (b) ? (a) : (b) +#define max(a, b) (a) > (b) ? (a) : (b) + +/* returns (in / 256)^n * 256. */ +uint8_t amp(uint8_t in, uint8_t n); + +#endif /* _SHARED_MATH_H_ */ |