mkjs/code/formats/sdat.js

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2017-09-08 09:24:16 -07:00
//
// sdat.js
//--------------------
// Reads sdat archives.
// Right now this just loads literally every resource in the sdat since in js there is no such thing as half loading a
// file from local storage, so why not just load it once and store in a usable format.
//
// by RHY3756547
//
// includes: gl-matrix.js (glMatrix 2.0)
//
window.sdat = function(input) {
var t = this;
this.sections = {};
this.load = load;
function load(input) {
t.buffer = input;
var view = new DataView(input);
var header = null;
var offset = 0;
var stamp = readChar(view, 0x0)+readChar(view, 0x1)+readChar(view, 0x2)+readChar(view, 0x3);
if (stamp != "SDAT") throw "SDAT invalid. Expected SDAT, found "+stamp;
var unknown1 = view.getUint32(0x4, true);
var filesize = view.getUint32(0x8, true);
var headsize = view.getUint16(0xC, true);
var numSections = view.getUint16(0xE, true);
var sectionOffsets = [];
var sectionSizes = [];
for (var i=3; i>-1; i--) { //reverse order so we can process files into js objects
var off = (view.getUint32(0x10+i*8, true));
var size = (view.getUint32(0x14+i*8, true));
if (size != 0) readSection(view, off);
}
}
function readSection(view, off) {
var stamp = "$"+readChar(view, off)+readChar(view, off+1)+readChar(view, off+2)+readChar(view, off+3);
if (sectionFunc[stamp] != null) t.sections[stamp] = sectionFunc[stamp](view, off+8);
else console.error("Invalid section in SDAT! No handler for section type "+stamp.substr(1, 4));
}
var sectionFunc = {}
sectionFunc["$SYMB"] = function(view, off) {
}
sectionFunc["$INFO"] = function(view, off) {
var obj = [];
for (var i=0; i<8; i++) {
var relOff = off+view.getUint32(off+i*4, true)-8;
var count = view.getUint32(relOff, true);
obj[i] = [];
relOff += 4;
var last = null;
for (var j=0; j<count; j++) {
var infoOff = view.getUint32(relOff, true);
//WRONG
last = recordInfoFunc[i](view, off+infoOff-8);//(infoOff == 0 && last != null)?last.nextOff:(off+infoOff-8));
obj[i][j] = last;
relOff += 4;
}
}
console.log(obj);
return obj;
}
sectionFunc["$FAT "] = function(view, off) {
var a = [];
var count = view.getUint32(off, true);
off += 4;
for (var i=0; i<count; i++) {
var obj = {};
obj.off = view.getUint32(off, true);
obj.size = view.getUint32(off+4, true);
off += 16;
a.push(obj);
}
console.log(a);
return a;
}
sectionFunc["$FILE"] = function(view, off) {
console.log("file");
}
var recordInfoFunc = []
recordInfoFunc[0] = function(view, off) {
var obj = {};
obj.fileID = view.getUint16(off, true);
obj.seq = new sseq(getFile(obj.fileID));
obj.pc = 0;
obj.unknown = view.getUint16(off+2, true);
obj.bank = view.getUint16(off+4, true);
obj.vol = view.getUint8(off+6);
obj.cpr = view.getUint8(off+7);
obj.ppr = view.getUint8(off+8);
obj.ply = view.getUint8(off+9);
obj.nextOff = off+10;
return obj;
}
recordInfoFunc[1] = function(view, off) {
var obj = {};
obj.fileID = view.getUint16(off, true);
obj.arc = new ssar(getFile(obj.fileID));
obj.unknown = view.getUint16(off+2, true);
obj.nextOff = off+4;
return obj;
}
recordInfoFunc[2] = function(view, off) {
var obj = {};
obj.fileID = view.getUint16(off, true);
obj.unknown = view.getUint16(off+2, true);
obj.bank = new sbnk(getFile(obj.fileID));
obj.waveArcs = [];
off += 4;
for (var i=0; i<4; i++) {
obj.waveArcs[i] = view.getUint16(off, true);
off += 2;
}
obj.nextOff = off;
return obj;
}
recordInfoFunc[3] = function(view, off) {
var obj = {};
obj.fileID = view.getUint16(off, true);
obj.unknown = view.getUint16(off+2, true);
obj.arc = new swar(getFile(obj.fileID));
obj.nextOff = off+4;
return obj;
}
recordInfoFunc[4] = function(view, off) {}
recordInfoFunc[5] = function(view, off) {}
recordInfoFunc[6] = function(view, off) {}
recordInfoFunc[7] = function(view, off) {
var obj = {};
obj.fileID = view.getUint16(off, true);
obj.unknown = view.getUint16(off+2, true);
obj.vol = view.getUint8(off+4);
obj.pri = view.getUint8(off+5);
obj.ply = view.getUint8(off+6);
obj.nextOff = off+7;
return obj;
}
function getFile(fid) {
var file = t.sections["$FAT "][fid];
if (file != null) {
return t.buffer.slice(file.off, file.off+file.size);
}
}
function readChar(view, offset) {
return String.fromCharCode(view.getUint8(offset));
}
if (input != null) {
load(input);
}
}