66 lines
2.0 KiB
JavaScript
66 lines
2.0 KiB
JavaScript
(function(window) {
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var AUDIO_RECORDER_WORKER = 'js/audioRecorderWorker.js';
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var AudioRecorder = function(source, cfg) {
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this.consumers = [];
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var config = cfg || {};
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var errorCallback = config.errorCallback || function() {};
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var inputBufferLength = config.inputBufferLength || 4096;
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var outputBufferLength = config.outputBufferLength || 4000;
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this.context = source.context;
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this.node = this.context.createScriptProcessor(inputBufferLength);
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var worker = new Worker(config.worker || AUDIO_RECORDER_WORKER);
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worker.postMessage({
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command: 'init',
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config: {
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sampleRate: this.context.sampleRate,
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outputBufferLength: outputBufferLength,
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outputSampleRate: (config.outputSampleRate || 16000)
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}
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});
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var recording = false;
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this.node.onaudioprocess = function(e) {
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if (!recording) return;
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worker.postMessage({
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command: 'record',
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buffer: [
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e.inputBuffer.getChannelData(0),
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e.inputBuffer.getChannelData(1)
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]
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});
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};
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this.start = function(data) {
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this.consumers.forEach(function(consumer, y, z) {
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consumer.postMessage({ command: 'start', data: data });
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recording = true;
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return true;
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});
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recording = true;
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return (this.consumers.length > 0);
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};
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this.stop = function() {
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if (recording) {
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this.consumers.forEach(function(consumer, y, z) {
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consumer.postMessage({ command: 'stop' });
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});
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recording = false;
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}
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worker.postMessage({ command: 'clear' });
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};
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this.cancel = function() {
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this.stop();
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};
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myClosure = this;
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worker.onmessage = function(e) {
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if (e.data.error && (e.data.error == "silent")) errorCallback("silent");
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if ((e.data.command == 'newBuffer') && recording) {
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myClosure.consumers.forEach(function(consumer, y, z) {
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consumer.postMessage({ command: 'process', data: e.data.data });
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});
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}
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};
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source.connect(this.node);
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this.node.connect(this.context.destination);
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};
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window.AudioRecorder = AudioRecorder;
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})(window);
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