- /* Copyright 2020 Christopher Courtney, aka Drashna Jael're (@drashna) <drashna@live.com>
- * Copyright 2020 Ploopy Corporation
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
- #pragma once
-
- #include <stdbool.h>
-
- #ifndef SCROLLER_AR_SIZE
- # define SCROLLER_AR_SIZE 31
- #endif
-
- #ifndef SCROLL_THRESH_RANGE_LIM
- # define SCROLL_THRESH_RANGE_LIM 10
- #endif
-
- enum State { HIHI, HILO, LOLO, LOHI };
-
- extern enum State state;
-
- /* Variables used for scroll wheel functionality. */
- extern bool lohif;
- extern bool hilof;
- extern int lowA;
- extern int highA;
- extern bool cLowA;
- extern bool cHighA;
- extern int lowIndexA;
- extern int highIndexA;
- extern bool lowOverflowA;
- extern bool highOverflowA;
- extern int lowB;
- extern int highB;
- extern bool cLowB;
- extern bool cHighB;
- extern int lowIndexB;
- extern int highIndexB;
- extern bool lowOverflowB;
- extern bool highOverflowB;
- extern int scrollThresholdA;
- extern int scrollThresholdB;
- extern int arLowA[SCROLLER_AR_SIZE];
- extern int arHighA[SCROLLER_AR_SIZE];
- extern int arLowB[SCROLLER_AR_SIZE];
- extern int arHighB[SCROLLER_AR_SIZE];
-
- void calculateThresholdA(int curA);
- void calculateThresholdB(int curB);
- int calculateThreshold(int cur, int* low, int* high, bool* cLow, bool* cHigh, int arLow[], int arHigh[], int* lowIndex, int* highIndex, bool* lowOverflow, bool* highOverflow);
- int thresholdEquation(int lo, int hi);
- void incrementIndex(int* index, bool* ovflw);
-
- void opt_encoder_init(void);
- int opt_encoder_handler(int curA, int curB);
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