switch to dtk setup (#2203)

* switch to dtk setup

* some cleanup / fixes

* cleanup d_a_alink literals

* Restore doxygen, update CI & README.md (#1)

* Fix build image ref (#2)

---------

Co-authored-by: Luke Street <luke@street.dev>

src/JSystem/JAudio2/JASSeqReader.cpp

@@ -0,0 +1,121 @@
+/**
+ * JASSeqReader.cpp
+ * 
+ */
+
+#include "JSystem/JAudio2/JASSeqReader.h"
+
+/* 80296108-80296148 290A48 0040+00 0/0 2/2 0/0 .text            init__12JASSeqReaderFv */
+void JASSeqReader::init() {
+    field_0x00 = 0;
+    field_0x04 = 0;
+    field_0x08 = 0;
+
+    for (int i = 0; i < 8; i++) {
+        field_0x0c[i] = NULL;
+        field_0x2c[i] = 0;
+    }
+}
+
+/* 80296148-8029618C 290A88 0044+00 0/0 1/1 0/0 .text            init__12JASSeqReaderFPv */
+void JASSeqReader::init(void* param_0) {
+    field_0x00 = (u32*)param_0;
+    field_0x04 = (u8*)field_0x00;
+    field_0x08 = 0;
+
+    for (int i = 0; i < 8; i++) {
+        field_0x0c[i] = NULL;
+        field_0x2c[i] = 0;
+    }
+    
+}
+
+/* 8029618C-802961CC 290ACC 0040+00 0/0 3/3 0/0 .text            call__12JASSeqReaderFUl */
+bool JASSeqReader::call(u32 param_0) {
+    if (field_0x08 >= 8) {
+        return false;
+    }
+
+    field_0x0c[field_0x08++] = (u16*)field_0x04;
+    field_0x04 = (u8*)((int)field_0x00 + param_0);
+
+    return true;
+}
+
+/* 802961CC-80296210 290B0C 0044+00 0/0 1/1 0/0 .text            loopStart__12JASSeqReaderFUl */
+bool JASSeqReader::loopStart(u32 param_0) {
+    if (8 <= field_0x08) {
+        return false;
+    }
+
+    field_0x0c[field_0x08] = (u16*)field_0x04;
+    field_0x2c[field_0x08++] = param_0;
+
+    return true;
+}
+
+
+/* 80296210-8029627C 290B50 006C+00 0/0 1/1 0/0 .text            loopEnd__12JASSeqReaderFv */
+bool JASSeqReader::loopEnd() {
+    if (field_0x08 == 0) {
+        return false;
+    }
+
+    u16 tmp = field_0x2c[field_0x08 - 1];
+
+    if (tmp != 0) {
+        tmp--;
+    }
+
+    if (!tmp) {
+        field_0x08--;
+        return true;
+    }
+
+    field_0x2c[field_0x08 - 1] = tmp;
+    field_0x04 = (u8*)field_0x0c[field_0x08 - 1];
+    return true;
+}
+
+/* 8029627C-802962B0 290BBC 0034+00 0/0 2/2 0/0 .text            ret__12JASSeqReaderFv */
+bool JASSeqReader::ret() {
+    if (field_0x08 == 0) {
+        return false;
+    }
+
+    field_0x04 = (u8*)field_0x0c[--field_0x08];
+
+    return true;
+}
+
+/* 802962B0-8029631C 290BF0 006C+00 0/0 2/2 0/0 .text            readMidiValue__12JASSeqReaderFv */
+int JASSeqReader::readMidiValue() {
+    int byte = readByte();
+
+    if (!(byte & 0x80)) {
+        return byte;
+    }
+
+    byte &= 0x7f;
+
+    int i = 0;
+
+    while (true) {
+        if (2 < i) {
+            return 0;
+        }
+
+        u8 newByte = readByte();
+        
+        byte = byte << 7;
+        byte |= newByte & 0x7f;
+
+        if (!(newByte & 0x80)) {
+            break;
+        }
+
+        i++;
+    }
+
+    return byte;
+}