56 lines
1.3 KiB
JavaScript
56 lines
1.3 KiB
JavaScript
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//
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// ssar.js
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//--------------------
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// Reads ssar files.
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// by RHY3756547
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//
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window.ssar = function(input) {
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var t = this;
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this.load = load;
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function load(input) {
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var view = new DataView(input);
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var header = null;
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var offset = 0;
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var stamp = readChar(view, 0x0)+readChar(view, 0x1)+readChar(view, 0x2)+readChar(view, 0x3);
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if (stamp != "SSAR") throw "SSAR invalid. Expected SSAR, found "+stamp;
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offset += 16;
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var data = readChar(view, offset)+readChar(view, offset+1)+readChar(view, offset+2)+readChar(view, offset+3);
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if (data != "DATA") throw "SSAR invalid, expected DATA, found "+data;
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offset += 8;
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t.dataOff = view.getUint32(offset, true);
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t.data = new Uint8Array(view.buffer.slice(t.dataOff));
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var count = view.getUint32(offset+4, true);
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t.entries = [];
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offset += 8;
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for (var i=0; i<count; i++) {
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t.entries.push(readSeqEntry(view, offset));
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offset += 12;
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}
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}
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function readSeqEntry(view, off) {
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var obj = {};
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obj.pc = view.getUint32(off, true);
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obj.seq = {data:t.data};
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obj.bank = view.getUint16(off+4, true);
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obj.vol = view.getUint8(off+6);
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obj.cpr = view.getUint8(off+7);
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obj.ppr = view.getUint8(off+8);
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obj.ply = view.getUint8(off+9);
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return obj;
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}
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function readChar(view, offset) {
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return String.fromCharCode(view.getUint8(offset));
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}
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if (input != null) {
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load(input);
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}
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}
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