[
{
"path": ".gitignore",
"content": "/node_modules\n/dist\n/package-lock.json\n"
},
{
"path": "CONTRIBUTING.md",
"content": "# How to Contribute\n\nWe'd love to accept your patches and contributions to this project. There are\njust a few small guidelines you need to follow.\n\n## Contributor License Agreement\n\nContributions to this project must be accompanied by a Contributor License\nAgreement. You (or your employer) retain the copyright to your contribution,\nthis simply gives us permission to use and redistribute your contributions as\npart of the project. Head over to to see\nyour current agreements on file or to sign a new one.\n\nYou generally only need to submit a CLA once, so if you've already submitted one\n(even if it was for a different project), you probably don't need to do it\nagain.\n\n## Code reviews\n\nAll submissions, including submissions by project members, require review. We\nuse GitHub pull requests for this purpose. Consult\n[GitHub Help](https://help.github.com/articles/about-pull-requests/) for more\ninformation on using pull requests.\n\n## Community Guidelines\n\nThis project follows [Google's Open Source Community\nGuidelines](https://opensource.google.com/conduct/).\n"
},
{
"path": "LICENSE",
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},
{
"path": "README.md",
"content": "
\n\n\n`audioworklet-polyfill` is a tiny JavaScript library that brings AudioWorklet support to all major browsers: Chrome, Firefox, Safari and Edge. It uses ScriptProcessorNode under the hood, and runs your Worklet code in an isolated scope on the main thread ([read why](#why-are-worklets-emulated-on-the-main-thread)).\n\n| [Basic Demo](https://googlechromelabs.github.io/audioworklet-polyfill/) | [DSP Playground Demo](https://audio-dsp-playground-polyfilled.surge.sh) |\n|-|-|\n\n> **New to AudioWorklet?** Check out this great [Introduction and Demos](https://developers.google.com/web/updates/2017/12/audio-worklet) or the [AudioWorklet Examples].\n\n## Usage\n\n```html\n\n\n\n```\n\nOr with a bundler:\n\n```js\nimport 'audioworklet-polyfill';\n```\n\n... or with ES Modules on the web:\n\n```js\nimport('https://unpkg.com/audioworklet-polyfill/dist/audioworklet-polyfill.js');\n```\n\n## Roadmap\n\n- Improve support for custom parameters\n\n## Why are Worklets emulated on the main thread?\n\nThis polyfill is intended to be a bridging solution until AudioWorklet is implemented across all browsers. It's an improvement over ScriptProcessorNode even though that's what it uses under the hood, because code written using this polyfill is forwards-compatible: as native support improves, your application improves. This polyfill offers a simple, future-proof alternative to ScriptProcessorNode without introducing Workers or relying on shared memory.\n\n## Similar Libraries\n\n[@jariseon](https://github.com/jariseon) has implemented [a similar polyfill](https://github.com/jariseon/audioworklet-polyfill) that uses Web Workers for audio processing.\n\n## License\n\n[Apache 2.0](LICENSE)\n\n[AudioWorklet]: https://webaudio.github.io/web-audio-api/#AudioWorklet\n[AudioWorklet Examples]: https://googlechromelabs.github.io/web-audio-samples/audio-worklet/\n"
},
{
"path": "demo/demo-worklet.js",
"content": "/**\n * Copyright 2018 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\"); you may not\n * use this file except in compliance with the License. You may obtain a copy of\n * the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS, WITHOUT\n * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the\n * License for the specific language governing permissions and limitations under\n * the License.\n */\n\nclass DemoProcessor extends AudioWorkletProcessor {\n static get parameterDescriptors () {\n return [\n { name: 'gain', defaultValue: 1 }\n ];\n }\n\n process (inputs, outputs, parameters) {\n const input = inputs[0];\n const output = outputs[0];\n const gain = parameters.gain;\n for (let channel = 0; channel < input.length; channel++) {\n const inputChannel = input[channel];\n const outputChannel = output[channel];\n for (let i = 0; i < inputChannel.length; i++) {\n outputChannel[i] = inputChannel[i] * gain[i];\n }\n }\n }\n}\n\nregisterProcessor('demo', DemoProcessor);\n"
},
{
"path": "demo/demo.js",
"content": "/**\n * Copyright 2018 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\"); you may not\n * use this file except in compliance with the License. You may obtain a copy of\n * the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS, WITHOUT\n * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the\n * License for the specific language governing permissions and limitations under\n * the License.\n */\n\n/* eslint-disable */\n\n// Copied verbatim from houdini-samples:\n// https://developers.google.com/web/updates/2017/12/audio-worklet#background_scriptprocessornode\n\nwindow.AudioContext = window.AudioContext || window.webkitAudioContext;\n\ndocument.getElementById('play').onclick = function() {\n\tvar context = new AudioContext();\n\n\t// Inject a tiny tranpiler to make IE11+ behave nicely:\n\ttry {\n\t\teval('class F {}');\n\t} catch (e) {\n\t\tcontext.audioWorklet.transpile = window.transpilerLite;\n\t}\n\n\tcontext.audioWorklet.addModule('noise-generator-worklet.js').then(() => {\n\t\tlet modulator = context.createOscillator();\n\t\tlet modGain = context.createGain();\n\t\tlet noiseGenerator = new AudioWorkletNode(context, 'noise-generator');\n\t\tnoiseGenerator.connect(context.destination);\n\t\tlet paramAmp = noiseGenerator.parameters.get('amplitude');\n\t\tmodulator.connect(modGain).connect(paramAmp);\n\t\tmodulator.frequency.value = 0.5;\n\t\tmodGain.gain.value = 0.75;\n\t\tmodulator.start();\n\t});\n\t\n\t/*\n\t// Loads module script via AudioWorklet.\n\tcontext.audioWorklet.addModule('demo-worklet.js').then(() => {\n\t\tvar oscillator = context.createOscillator();\n\n\t\t// After the resolution of module loading, an AudioWorkletNode can be constructed.\n\t\tvar demoNode = new AudioWorkletNode(context, 'demo');\n\n\t\t// AudioWorkletNode can be interoperable with other native AudioNodes.\n\t\toscillator.connect(demoNode).connect(context.destination);\n\t\toscillator.start();\n\t});\n\t*/\n}\n"
},
{
"path": "demo/index.html",
"content": "\n\n\t\n\t\t\n\t\n\t\n\t\t
\n\t\t\tThis is a demonstration of the AudioWorklet Polyfill.\n\t\t
\n\n\t\t
\n\t\t\tNote: This polyfill runs AudioWorklets in an isolated context on the main thread.\n\t\t
![\"AudioWorklet](\"https://i.imgur.com/RqW6b4o.png\")
\n ![\"npm\"](\"https://img.shields.io/npm/v/audioworklet-polyfill.svg?style=flat\")
\n