opensteno_qmk/quantum/audio/muse.c

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#include "muse.h"
enum {
MUSE_OFF,
MUSE_ON,
MUSE_C_1_2,
MUSE_C1,
MUSE_C2,
MUSE_C4,
MUSE_C8,
MUSE_C3,
MUSE_C6,
MUSE_B1,
MUSE_B2,
MUSE_B3,
MUSE_B4,
MUSE_B5,
MUSE_B6,
MUSE_B7,
MUSE_B8,
MUSE_B9,
MUSE_B10,
MUSE_B11,
MUSE_B12,
MUSE_B13,
MUSE_B14,
MUSE_B15,
MUSE_B16,
MUSE_B17,
MUSE_B18,
MUSE_B19,
MUSE_B20,
MUSE_B21,
MUSE_B22,
MUSE_B23,
MUSE_B24,
MUSE_B25,
MUSE_B26,
MUSE_B27,
MUSE_B28,
MUSE_B29,
MUSE_B30,
MUSE_B31
};
bool number_of_ones_to_bool[16] = {
1, 0, 0, 1, 0, 1, 1, 0,
0, 1, 1, 0, 1, 0, 0, 1
};
uint8_t muse_interval[4] = {MUSE_B7, MUSE_B19, MUSE_B3, MUSE_B28};
uint8_t muse_theme[4] = {MUSE_B8, MUSE_B23, MUSE_B18, MUSE_B17};
bool muse_timer_1bit = 0;
uint8_t muse_timer_2bit = 0;
uint8_t muse_timer_2bit_counter = 0;
uint8_t muse_timer_4bit = 0;
uint32_t muse_timer_31bit = 0;
bool bit_for_value(uint8_t value) {
switch (value) {
case MUSE_OFF:
return 0;
case MUSE_ON:
return 1;
case MUSE_C_1_2:
return muse_timer_1bit;
case MUSE_C1:
return (muse_timer_4bit & 1);
case MUSE_C2:
return (muse_timer_4bit & 2);
case MUSE_C4:
return (muse_timer_4bit & 4);
case MUSE_C8:
return (muse_timer_4bit & 8);
case MUSE_C3:
return (muse_timer_2bit & 1);
case MUSE_C6:
return (muse_timer_2bit & 2);
default:
return muse_timer_31bit & (1UL << (value - MUSE_B1));
}
}
uint8_t muse_clock_pulse(void) {
bool top = number_of_ones_to_bool[
bit_for_value(muse_theme[0]) +
(bit_for_value(muse_theme[1]) << 1) +
(bit_for_value(muse_theme[2]) << 2) +
(bit_for_value(muse_theme[3]) << 3)
];
if (muse_timer_1bit == 0) {
if (muse_timer_2bit_counter == 0) {
muse_timer_2bit = (muse_timer_2bit + 1) % 4;
}
muse_timer_2bit_counter = (muse_timer_2bit_counter + 1) % 3;
muse_timer_4bit = (muse_timer_4bit + 1) % 16;
muse_timer_31bit = (muse_timer_31bit << 1) + top;
}
muse_timer_1bit = (muse_timer_1bit + 1) % 2;
return
bit_for_value(muse_interval[0]) +
(bit_for_value(muse_interval[1]) << 1) +
(bit_for_value(muse_interval[2]) << 2) +
(bit_for_value(muse_interval[3]) << 3);
}