ltgcgo/octavia

/*
 
Just a simple KORG KROSS 2 PCG file to bank mapping converter.
I bear no responsibility for you running this piece of software. You have been warned.
 
License: WTFPL
 
*/
 
"use strict";
 
Uint8Array.prototype.same = function (arr) {
    let same = true;
    arr.forEach((e, i) => {
        same = same && this[i] == e;
    });
    return same;
};
Uint8Array.prototype.readInt = function () {
    let sum = 0;
    this.forEach((e) => {
        sum *= 256;
        sum += e;
    });
    return sum;
};
 
let utf8Dec = new TextDecoder();
 
let sysexBlob = await Deno.readFile(`${Deno.args[0]}`);
console.error(`KORG KROSS 2 PCG file size: ${sysexBlob.length} bytes.`);
console.error(`File type: ${utf8Dec.decode(sysexBlob.subarray(16, 20))}`);
 
let ptr = 100, mode = 0, headSects = 0, resume = true;
let sections = [], sectPtr = 0;
while (resume) {
    let rwin = sysexBlob.subarray(ptr);
    ([() => {
        resume = utf8Dec.decode(rwin.subarray(0, 4)) == "INI2";
        headSects = rwin[15];
        console.error(`Section count: ${headSects}`);
        ptr += 16;
        mode = 1;
    }, () => {
        let type = utf8Dec.decode(rwin.subarray(0, 4));
        let tipMsb = rwin[5], tipLsb = rwin[7];
        let nameLen = rwin[11];
        let length = rwin.subarray(12, 16).readInt();
        let start = rwin.subarray(16, 20).readInt();
        let entryLen = rwin.subarray(36, 40).readInt();
        let name = utf8Dec.decode(rwin.subarray(44, 44 + nameLen));
        /* console.error(``);
        console.error(`Section type: ${type}`);
        console.error(`Section ID: ${tipMsb.toString(16)} ${tipLsb.toString(16)}`);
        console.error(`Section name length: ${nameLen}`);
        console.error(`Section size: ${length} byte(s)`);
        console.error(`Start pointer: ${start}`);
        console.error(`Entry size: ${entryLen} byte(s)`);
        console.error(`Section name: ${name}`) */
        sections.push({
            type, tipMsb, tipLsb, nameLen,
            length, start, entryLen, name
        });
        ptr += 64;
        headSects --;
        if (headSects < 1) {
            mode = 2;
        };
    }, () => {
        // Section reading mode
        let section = sections[sectPtr];
        let sectWin = sysexBlob.subarray(section.start, section.start + section.length);
        console.error(`\nNow reading #${(sectPtr + 1).toString().padStart(2, "0")}:${section.type} (${section.name})`);
        switch (section.type) {
            case "PRG1": {
                console.info(`MSB    PRG    LSB    NME`);
                break;
            };
            case "PBK1": {
                let msb = 63, prg = (section.tipMsb ? 6 : 0) + section.tipLsb;
                for (let i = 0; i < 128; i ++) {
                    let entryStart = i * section.entryLen;
                    let entryWin = sectWin.subarray(entryStart, entryStart + section.entryLen);
                    let name = utf8Dec.decode(entryWin.subarray(0, 24)).trimEnd().replace("InitProg", "");
                    name.length && console.info(`${(msb).toString().padStart(3, "0")}    ${(prg).toString().padStart(3, "0")}    ${(i).toString().padStart(3, "0")}    ${name}`);
                };
                break;
            };
            case "CBK1": {
                let msb = 63, prg = (section.tipMsb ? 3 : 0) + section.tipLsb + 10;
                for (let i = 0; i < 128; i ++) {
                    let entryStart = i * section.entryLen;
                    let entryWin = sectWin.subarray(entryStart, entryStart + section.entryLen);
                    let name = utf8Dec.decode(entryWin.subarray(0, 24)).trimEnd().replace("InitCombi", "");
                    name.length && console.info(`${(msb).toString().padStart(3, "0")}    ${(prg).toString().padStart(3, "0")}    ${(i).toString().padStart(3, "0")}    ${name}`);
                };
                break;
            };
        };
        sectPtr ++;
        if (sectPtr >= sections.length) {
            mode = 3;
            resume = false;
        };
    }][mode] || (() => {
        resume = false;
        console.error(`Mode out of bound. Stopping.`);
    }))();
};