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copyToChannel polyfill

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This commit is contained in:
Yotam Mann 2017-03-13 00:40:30 -04:00
parent 84bbdb5c04
commit 5ab8f82d3e
1 changed files with 15 additions and 9 deletions
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24
Tone/core/Buffer.js
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@ -2,6 +2,20 @@ define(["Tone/core/Tone", "Tone/core/Emitter", "Tone/type/Type"], function(Tone)
"use strict";
/**
* AudioBuffer.copyToChannel polyfill
* @private
*/
if (window.AudioBuffer && !AudioBuffer.prototype.copyToChannel){
AudioBuffer.prototype.copyToChannel = function(dest, chanNum, start){
var channel = this.getChannelData(chanNum);
start = start || 0;
for (var i = start; i < channel.length; i++){
channel[i-start] = dest[i];
}
};
}
/**
* @class Buffer loading and storage. Tone.Buffer is used internally by all
* classes that make requests for audio files such as Tone.Player,
@ -230,15 +244,7 @@ define(["Tone/core/Tone", "Tone/core/Emitter", "Tone/type/Type"], function(Tone)
array = [array];
}
for (var c = 0; c < channels; c++){
if (this.isFunction(buffer.copyToChannel)){
buffer.copyToChannel(array[c], c);
} else {
var channel = buffer.getChannelData(c);
var channelArray = array[c];
for (var i = 0; i < channelArray.length; i++){
channel[i] = channelArray[i];
}
}
buffer.copyToChannel(array[c], c);
}
this._buffer = buffer;
return this;