Move file into engine

src/engine/chipUtils.h

@@ -0,0 +1,67 @@
+/**
+ * Furnace Tracker - multi-system chiptune tracker
+ * Copyright (C) 2021-2022 tildearrow and contributors
+ *
+ * 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef _CHIP_UTILS_H
+#define _CHIP_UTILS_H
+
+// custom clock limits
+#define MIN_CUSTOM_CLOCK 100000
+#define MAX_CUSTOM_CLOCK 40000000
+
+// common shared channel struct
+struct SharedChannel {
+  int ins;
+  int note;
+  bool active, insChanged, keyOn, keyOff;
+  SharedChannel():
+    ins(-1),
+    note(0),
+    active(false),
+    insChanged(true),
+    keyOn(false),
+    keyOff(false) {} 
+};
+
+// common shared channel struct with frequency
+struct SharedChannelFreq: public SharedChannel {
+  int freq, baseFreq, pitch, pitch2;
+  bool freqChanged, inPorta, portaPause;
+  SharedChannelFreq():
+    SharedChannel(),
+    freq(0),
+    baseFreq(0),
+    pitch(0),
+    pitch2(0),
+    freqChanged(false),
+    inPorta(false),
+    portaPause(false) {}
+};
+
+// common shared channel volume struct
+template<typename T>
+struct SharedChannelVolume {
+  bool volumeChanged;
+  T vol, outVol, resVol;
+  SharedChannelVolume(T initVol):
+    vol(initVol),
+    outVol(initVol),
+    resVol(initVol) {}
+};
+
+#endif