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feat: add feature description; fix wave_producer_valid test
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‎README.md‎

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# Description
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This project aims to run Web Audio API in Android with javascript code. Most of the available APIs have passed wpt test cases.
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Now it supports following Web Audio feature:
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| Features | Interface Support State | Test State |
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| --------------------------- | ------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| AudioBuffer | <font color="green">Full Support</font> | <font color="yellow">Not Pass All Wpt Test (lack support of "ConvolverNode", "ChannelMergerNode")</font> |
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| AudioContext | <font color="green">Partial Support</font> | <font color="yellow">Not Test Yet</font> |
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| AudioDestinationNode | <font color="yellow">Full Support</font> | <font color="green">Complete</font> |
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| AudioNode | <font color="yellow">Partial Support</font> | <font color="red">Not Test Yet</font> |
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| AudioParam | <font color="yellow">Partial Support</font> | <font color="red">Not Test Yet</font> |
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| AudioScheduledSourceNode | <font color="yellow">Partial Support</font> | <font color="grey">No Wpt Test</font> |
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| BaseAudioContext | <font color="yellow">Partial Support</font> | <font color="grey">No Wpt Test</font> |
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| OfflineAudioCompletionEvent | <font color="yellow">Partial Support</font> | <font color="grey">No Wpt Test</font> |
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| OfflineAudioContext | <font color="yellow">Partial Support</font> | <font color="green">Complete</font> |
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| OscillatorNode | <font color="yellow">Partial Support</font> | <font color="yellow">Not Pass All Wpt Test (lack support of "ChannelMergerNode")</font> |
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| GainNode | <font color="green">Full Support</font> | <font color="yellow">Not Pass All Wpt Test (lack support of "ChannelMergerNode")</font> |
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| DelayNode | <font color="green">Full Support</font> | <font color="yellow">Not Pass All Wpt Test (lack support of "ConstantSourceNode", "ChannelSplitterNode", "ChannelMergerNode")</font> |
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| AudioBufferSourceNode | <font color="green">Full Support</font> | <font color="yellow">Not Pass All Wpt Test (lack support of "AudioWorkletNode", "ChannelMergerNode", "EventListener", "decodeAudioData", "setValueAtTime")</font> |
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more detail info is descript [here](./js_api_define/features.md).
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# Run
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1. run `npm install` for installing dependency
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# Note:
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1. `combine` script in package.json is used to make vscode recognize all cpp files in different module inside android module. When Android Build success, scripts in `build.gradle.kts` will move all `compile_commands.json` contents to `.vscode/compile_commands.json`, this will make vscode cpp intelligence works fine.
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# Plan
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| Features | Complete State | Test State |
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| --------------------------- | ---------------------------------------------------------- | -------------------------------------------------------------------------------------------------------- |
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| AudioBuffer | <font color="green">Complete</font> | <font color="yellow">Not Pass All Wpt Test (lack support of "ConvolverNode", "ChannelMergerNode")</font> |
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| AudioContext | <font color="green">Complete</font> | <font color="yellow">Not Test Yet</font> |
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| AudioDestinationNode | <font color="yellow">1. All data member is readonly</font> | <font color="green">Complete</font> |
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| AudioNode | <font color="green">Complete</font> | <font color="red">Not Test Yet</font> |
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| AudioParam | <font color="green">Complete</font> | <font color="red">Not Test Yet</font> |
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| AudioScheduledSourceNode | <font color="green">Complete</font> | <font color="grey">No Wpt Test</font> |
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| BaseAudioContext | <font color="green">Complete</font> | <font color="grey">No Wpt Test</font> |
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| OfflineAudioCompletionEvent | <font color="green">Complete</font> | <font color="grey">No Wpt Test</font> |
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| OfflineAudioContext | <font color="green">Complete</font> | <font color="green">Complete</font> |
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| OscillatorNode | <font color="green">Complete</font> | <font color="yellow">Not Pass All Wpt Test (lack support of "ChannelMergerNode")</font> |
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| GainNode | <font color="green">Complete</font> | <font color="yellow">Not Pass All Wpt Test (lack support of "ChannelMergerNode")</font> |
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| DelayNode | <font color="green">Complete</font> | <font color="red">Not Test Yet (lack support of "ConstantSourceNode", "AudioBufferSourceNode", "ChannelSplitterNode", "ChannelMergerNode")</font> |
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| AudioBufferSourceNode | <font color="red">Not Complete</font> | <font color="red">Not Test Yet (lack support of "AudioWorkletNode", "ChannelMergerNode")</font> |
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| MediaRecorderNode | <font color="red">Not Complete</font> | <font color="red">Not Test Yet</font> |
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| MicrophoneStreamNode | <font color="red">Not Complete</font> | <font color="red">Not Test Yet</font> |

‎index.js‎

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for (let i = 0; i < task_list.length; i++) {
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await task_list[i]();
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// do gc() to clear nodejs async queue
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global.gc();
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}
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}
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async function GetTuneAudioBuffer(tunes, numberOfChannels, ctx) {
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const audioBuffer = new AudioBuffer({
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numberOfChannels: numberOfChannels,
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length: ctx.sampleRate * tunes.length,
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sampleRate: ctx.sampleRate,
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});
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for (let i = 0; i < tunes.length; i++) {
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console.log("flag01");
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const offline_audio_ctx = new OfflineAudioContext(
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numberOfChannels,
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ctx.sampleRate,
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ctx.sampleRate
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);
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console.log("flag02");
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const osc = new OscillatorNode(offline_audio_ctx, { frequency: tunes[i] });
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console.log("flag03");
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osc.connect(offline_audio_ctx.destination);
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console.log("flag04");
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osc.start();
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console.log("flag05");
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let buffer = await offline_audio_ctx.startRendering();
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audioBuffer.copyToChannel(buffer.getChannelData(0), 0, i * ctx.sampleRate);
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audioBuffer.copyToChannel(buffer.getChannelData(1), 1, i * ctx.sampleRate);
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}
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return audioBuffer;
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}
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// const tune = [261.625, 293.664, 329.628, 349.228, 391.995, 440, 493.883];
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// let ctx = new AudioContext();
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async function Test(loopStart, loopEnd, playbackRate) {
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// let ctx = new AudioContext();
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let audioBuffer = await GetTuneAudioBuffer(tune, 2, ctx);
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let audioBufferSourceNode = ctx.createBufferSource();
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audioBufferSourceNode.buffer = audioBuffer;
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audioBufferSourceNode.loop = true;
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audioBufferSourceNode.loopStart = loopStart;
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audioBufferSourceNode.loopEnd = loopEnd;
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audioBufferSourceNode.playbackRate = playbackRate;
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// let audioBufferSourceNode = new AudioBufferSourceNode(ctx, {
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// buffer: audioBuffer,
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// loop: true,
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// loopStart: loopStart,
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// loopEnd: loopEnd,
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// playbackRate: playbackRate,
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// });
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console.log("before start");
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audioBufferSourceNode.start(0, 0, 20);
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console.log("before connect");
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audioBufferSourceNode.connect(ctx.destination);
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setTimeout(() => {
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console.log("before stop");
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audioBufferSourceNode.stop();
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}, 14000);
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}
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AllTest();
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// Test(3, 7, 1.0);

‎js_api_define/AudioParam.ts‎

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interface AudioParam {
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value: number /* float */
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// @ts-ignore
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readonly automationRate: AutomationRate // currently only support a-rate
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readonly automationRate: AutomationRate // currently only support k-rate
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readonly defaultValue: number /* float */
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readonly minValue: number /* float */
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readonly maxValue: number /* float */
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};
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};

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