89 lines
2.8 KiB
JavaScript
89 lines
2.8 KiB
JavaScript
"use strict";
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var File = require("./file");
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var Vocabulary = require("../../wType/vocabulary");
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var Vector = require("../../wType/vector");
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var Uint64 = require("../../wType/uint64");
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var Audio = File.inherit({
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className: "Audio",
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constructor: function Audio(addr) {
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File.fn.constructor.call(this, addr);
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this._loadedFrames = 0;
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this._totalFrames = 0;
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this._waitingForFrames = false;
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this._frames = new Vector();
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this.addHandler("responseFrames");
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},
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destructor: function() {
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this._frames.destructor();
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File.fn.destructor.call(this);
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},
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hasMore: function() {
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return this._totalFrames > this._loadedFrames;
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},
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_getAdditional: function(add) {
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var ac = File.fn._getAdditional.call(this, add);
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if (ac) {
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this._loadedFrames = 0;
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this._totalFrames = this._additional.at("framesAmount").valueOf();
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this._waitingForFrames = false;
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}
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this.initialized = true;
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return ac;
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},
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_h_responseFrames: function(ev) {
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if (this._waitingForFrames === true) {
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var data = ev.getData();
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var success = data.at("result").valueOf();
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if (success === 0) {
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var frames = data.at("frames");
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var amount = frames.length();
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var buffer = new ArrayBuffer(0);
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for (var i = 0; i < amount; ++i) {
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var blob = frames.at(i).clone();
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this._frames.push(blob);
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var frame = blob.valueOf();
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var newArr = new Uint8Array(buffer.byteLength + frame.byteLength);
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newArr.set(new Uint8Array(buffer), 0);
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newArr.set(new Uint8Array(frame), buffer.byteLength);
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buffer = newArr.buffer;
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}
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this._loadedFrames += amount;
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this._waitingForFrames = false;
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this.trigger("newFrames", buffer);
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}
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}
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},
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requestMore: function() {
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if (!this._waitingForFrames) {
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if (this._registered && this._subscribed) {
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var allowed = this._totalFrames - this._loadedFrames;
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if (allowed > 0) {
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var vc = new Vocabulary();
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vc.insert("index", new Uint64(this._loadedFrames));
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vc.insert("amount", new Uint64(Math.min(framePortion, allowed)));
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this.send(vc, "requestFrames");
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this._waitingForFrames = true;
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}
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}
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}
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}
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});
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var framePortion = 10;
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module.exports = Audio;
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