111 lines
3.4 KiB
JavaScript
111 lines
3.4 KiB
JavaScript
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/**
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* @license -------------------------------------------------------------------
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* module: WebAudioShim - Fix naming issues for WebAudioAPI supports
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* src: https://github.com/Dinahmoe/webaudioshim
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* author: Dinahmoe AB
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* -------------------------------------------------------------------
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* Copyright (c) 2012 DinahMoe AB
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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window.AudioContext = window.AudioContext || window.webkitAudioContext || null;
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window.OfflineAudioContext = window.OfflineAudioContext || window.webkitOfflineAudioContext || null;
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(function (Context) {
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var isFunction = function (f) {
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return Object.prototype.toString.call(f) === "[object Function]" ||
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Object.prototype.toString.call(f) === "[object AudioContextConstructor]";
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};
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var contextMethods = [
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["createGainNode", "createGain"],
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["createDelayNode", "createDelay"],
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["createJavaScriptNode", "createScriptProcessor"]
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];
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///
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var proto;
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var instance;
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var sourceProto;
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///
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if (!isFunction(Context)) {
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return;
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}
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instance = new Context();
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if (!instance.destination || !instance.sampleRate) {
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return;
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}
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proto = Context.prototype;
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sourceProto = Object.getPrototypeOf(instance.createBufferSource());
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if (!isFunction(sourceProto.start)) {
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if (isFunction(sourceProto.noteOn)) {
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sourceProto.start = function (when, offset, duration) {
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switch (arguments.length) {
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case 0:
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throw new Error("Not enough arguments.");
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case 1:
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this.noteOn(when);
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break;
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case 2:
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if (this.buffer) {
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this.noteGrainOn(when, offset, this.buffer.duration - offset);
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} else {
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throw new Error("Missing AudioBuffer");
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}
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break;
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case 3:
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this.noteGrainOn(when, offset, duration);
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}
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};
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}
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}
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if (!isFunction(sourceProto.noteOn)) {
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sourceProto.noteOn = sourceProto.start;
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}
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if (!isFunction(sourceProto.noteGrainOn)) {
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sourceProto.noteGrainOn = sourceProto.start;
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}
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if (!isFunction(sourceProto.stop)) {
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sourceProto.stop = sourceProto.noteOff;
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}
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if (!isFunction(sourceProto.noteOff)) {
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sourceProto.noteOff = sourceProto.stop;
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}
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contextMethods.forEach(function (names) {
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var name1;
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var name2;
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while (names.length) {
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name1 = names.pop();
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if (isFunction(this[name1])) {
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this[names.pop()] = this[name1];
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} else {
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name2 = names.pop();
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this[name1] = this[name2];
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}
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}
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}, proto);
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})(window.AudioContext);
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