ltgcgo/octavia

"use strict";
 
import {BlobDecoder} from "./decoders.mjs";
 
// Utils
let same = function (origin, arr) {
    let same = true;
    arr.forEach((e, i) => {
        same = same && origin[i] === e;
    });
    return same;
};
let readInt = function (arr) {
    let sum = 0;
    arr.forEach((e) => {
        sum *= 256;
        sum += e;
    });
    return sum;
};
let utf8Dec = new TextDecoder();
 
// Register decoders
let bankDecoder = new BlobDecoder();
bankDecoder.set("s7e", async function (blob) {
    let s7eBlob = new Uint8Array(await blob.slice(0, 65536).arrayBuffer());
    let voiceMap = "MSB    LSB    PRG    NME";
    // Constants
    const nullHead = [0, 0, 0, 0];
    const globalOffset = 32;
    let ptr = 0, mode = 0, resume = true;
    let sections = [], sectPtr = 0;
    while (resume) {
        let rwin = s7eBlob.subarray(ptr);
        ([() => {
            // Waiting for header read
            if (utf8Dec.decode(rwin.subarray(0, 4)) === "YSFC") {
                ptr += 80;
                mode = 1;
            } else {
                ptr ++;
            };
        }, () => {
            // Read offsets of each section
            if (same(rwin.subarray(0, 4), nullHead)) {
                sections.forEach((e, i, a) => {
                    let length = readInt(s7eBlob.subarray(e.start + 4, e.start + 8));
                    e.length = length;
                });
                mode = 2;
            } else {
                let type = utf8Dec.decode(rwin.subarray(0, 4)),
                start = readInt(rwin.subarray(4, 8));
                //console.error(`Section ${type} begins at ${start}.`);
                sections.push({type, start});
                ptr += 8;
            };
        }, () => {
            // Read sections
            let section = sections[sectPtr];
            let sectWin = s7eBlob.subarray(section.start, section.start + section.length);
            let entryLen = 32;
            switch (section.type) {
                case "ENVC": {
                    // Encoded Normal Voice Config
                    let entryStart = globalOffset;
                    while (entryStart < sectWin.length) {
                        let entryWin = sectWin.subarray(entryStart, entryStart + entryLen);
                        let voiceName = utf8Dec.decode(entryWin.subarray(0, 10)).trimEnd();
                        if (voiceName.slice(0, 5) === "Init ") {
                            voiceName = "";
                        };
Similar blocks of code found in 2 locations. Consider refactoring.
                        if (voiceName) {
                            voiceMap += `\n063    ${(entryWin[17] + 13).toString().padStart(3, "0")}    ${entryWin[19].toString().padStart(3, "0")}    ${voiceName}`;
                        };
                        entryStart += entryLen;
                    };
                    break;
                };
                case "EDVC": {
                    // Encoded Drum Voice Config
                    let entryStart = globalOffset;
                    while (entryStart < sectWin.length) {
                        let entryWin = sectWin.subarray(entryStart, entryStart + entryLen);
                        let voiceName = utf8Dec.decode(entryWin.subarray(0, 10)).trimEnd();
                        if (voiceName.slice(0, 5) === "Init ") {
                            voiceName = "";
                        };
                        if (voiceName) {
                            voiceMap += `\n063    024    ${entryWin[19].toString().padStart(3, "0")}    ${voiceName}`;
                        };
                        entryStart += entryLen;
                    };
                    break;
                };
                case "EPVC": {
                    // Encoded Plugin Voice Config
                    let entryLen = 32, entryStart = globalOffset;
                    while (entryStart < sectWin.length) {
                        let entryWin = sectWin.subarray(entryStart, entryStart + entryLen);
                        let voiceName = utf8Dec.decode(entryWin.subarray(0, 10)).trimEnd();
                        if (voiceName === "----------") {
                            voiceName = "";
                        };
Similar blocks of code found in 2 locations. Consider refactoring.
                        if (voiceName) {
                            voiceMap += `\n063    ${(entryWin[17] + 1).toString().padStart(3, "0")}    ${entryWin[19].toString().padStart(3, "0")}    ${voiceName}`;
                        };
                        entryStart += entryLen;
                    };
                    break;
                };
            };
            sectPtr ++;
            if (sectPtr >= sections.length) {
                mode = 3;
                resume = false;
            };
        }][mode] || (() => {
            resume = false;
        }))();
    };
    return voiceMap;
});
bankDecoder.set("pcg", async function (blob) {
    let sysexBlob = new Uint8Array(await blob.arrayBuffer());
    let voiceMap = "MSB    LSB    PRG    NME";
    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: ${headSects}`);
            ptr += 16;
            mode = 1;
        }, () => {
            let type = utf8Dec.decode(rwin.subarray(0, 4));
            let tipMsb = rwin[5], tipLsb = rwin[7];
            let nameLen = rwin[11];
            let length = readInt(rwin.subarray(12, 16));
            let start = readInt(rwin.subarray(16, 20));
            let entryLen = readInt(rwin.subarray(36, 40));
            let name = utf8Dec.decode(rwin.subarray(44, 44 + nameLen));
            sections.push({
                type, tipMsb, tipLsb, nameLen,
                length, start, entryLen, name
            });
            ptr += 64;
            headSects --;
            if (headSects < 1) {
                mode = 2;
            };
        }, () => {
            // Section reading mode
            let section = sections[sectPtr];
            let sectWin = sysexBlob.subarray(section.start, section.start + section.length);
            switch (section.type) {
                case "PRG1": {
                    break;
                };
                case "PBK1": {
                    let msb = 63, prg = (section.tipMsb ? 6 : 0) + section.tipLsb;
Similar blocks of code found in 2 locations. Consider refactoring.
                    for (let i = 0; i < 128; i ++) {
                        let entryStart = i * section.entryLen;
                        let entryWin = sectWin.subarray(entryStart, entryStart + section.entryLen);
                        let name = utf8Dec.decode(entryWin.subarray(0, 24)).trimEnd().replace("InitProg", "");
                        if (name.length && prg > 5) {
                            voiceMap += `\n${(msb).toString().padStart(3, "0")}    ${(prg).toString().padStart(3, "0")}    ${(i).toString().padStart(3, "0")}    ${name}`;
                        };
                    };
                    break;
                };
                case "CBK1": {
                    let msb = 63, prg = (section.tipMsb ? 3 : 0) + section.tipLsb + 10;
Similar blocks of code found in 2 locations. Consider refactoring.
                    for (let i = 0; i < 128; i ++) {
                        let entryStart = i * section.entryLen;
                        let entryWin = sectWin.subarray(entryStart, entryStart + section.entryLen);
                        let name = utf8Dec.decode(entryWin.subarray(0, 24)).trimEnd().replace("InitCombi", "");
                        if (name.length && prg > 12) {
                            voiceMap += `\n${(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.`);
        }))();
    };
    //console.debug(voiceMap);
    return voiceMap;
});
 
export {
    bankDecoder
};