Adicionando o ggwave.js
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Rafael Tavares Juliani committed
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var ggwave_factory = (() => {
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var _scriptDir = typeof document !== 'undefined' && document.currentScript ? document.currentScript.src : undefined;
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if (typeof __filename !== 'undefined') _scriptDir = _scriptDir || __filename;
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return (
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function(moduleArg = {}) {
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var Module=moduleArg;var readyPromiseResolve,readyPromiseReject;Module["ready"]=new Promise((resolve,reject)=>{readyPromiseResolve=resolve;readyPromiseReject=reject});var moduleOverrides=Object.assign({},Module);var arguments_=[];var thisProgram="./this.program";var quit_=(status,toThrow)=>{throw toThrow};var ENVIRONMENT_IS_WEB=typeof window=="object";var ENVIRONMENT_IS_WORKER=typeof importScripts=="function";var ENVIRONMENT_IS_NODE=typeof process=="object"&&typeof process.versions=="object"&&typeof process.versions.node=="string";var scriptDirectory="";function locateFile(path){if(Module["locateFile"]){return Module["locateFile"](path,scriptDirectory)}return scriptDirectory+path}var read_,readAsync,readBinary,setWindowTitle;if(ENVIRONMENT_IS_NODE){var fs=require("fs");var nodePath=require("path");if(ENVIRONMENT_IS_WORKER){scriptDirectory=nodePath.dirname(scriptDirectory)+"/"}else{scriptDirectory=__dirname+"/"}read_=(filename,binary)=>{filename=isFileURI(filename)?new URL(filename):nodePath.normalize(filename);return fs.readFileSync(filename,binary?undefined:"utf8")};readBinary=filename=>{var ret=read_(filename,true);if(!ret.buffer){ret=new Uint8Array(ret)}return ret};readAsync=(filename,onload,onerror,binary=true)=>{filename=isFileURI(filename)?new URL(filename):nodePath.normalize(filename);fs.readFile(filename,binary?undefined:"utf8",(err,data)=>{if(err)onerror(err);else onload(binary?data.buffer:data)})};if(!Module["thisProgram"]&&process.argv.length>1){thisProgram=process.argv[1].replace(/\\/g,"/")}arguments_=process.argv.slice(2);quit_=(status,toThrow)=>{process.exitCode=status;throw toThrow};Module["inspect"]=()=>"[Emscripten Module object]"}else if(ENVIRONMENT_IS_WEB||ENVIRONMENT_IS_WORKER){if(ENVIRONMENT_IS_WORKER){scriptDirectory=self.location.href}else if(typeof document!="undefined"&&document.currentScript){scriptDirectory=document.currentScript.src}if(_scriptDir){scriptDirectory=_scriptDir}if(scriptDirectory.indexOf("blob:")!==0){scriptDirectory=scriptDirectory.substr(0,scriptDirectory.replace(/[?#].*/,"").lastIndexOf("/")+1)}else{scriptDirectory=""}{read_=url=>{var xhr=new XMLHttpRequest;xhr.open("GET",url,false);xhr.send(null);return xhr.responseText};if(ENVIRONMENT_IS_WORKER){readBinary=url=>{var xhr=new XMLHttpRequest;xhr.open("GET",url,false);xhr.responseType="arraybuffer";xhr.send(null);return new Uint8Array(xhr.response)}}readAsync=(url,onload,onerror)=>{var xhr=new XMLHttpRequest;xhr.open("GET",url,true);xhr.responseType="arraybuffer";xhr.onload=()=>{if(xhr.status==200||xhr.status==0&&xhr.response){onload(xhr.response);return}onerror()};xhr.onerror=onerror;xhr.send(null)}}setWindowTitle=title=>document.title=title}else{}var out=Module["print"]||console.log.bind(console);var err=Module["printErr"]||console.error.bind(console);Object.assign(Module,moduleOverrides);moduleOverrides=null;if(Module["arguments"])arguments_=Module["arguments"];if(Module["thisProgram"])thisProgram=Module["thisProgram"];if(Module["quit"])quit_=Module["quit"];var wasmBinary;if(Module["wasmBinary"])wasmBinary=Module["wasmBinary"];var noExitRuntime=Module["noExitRuntime"]||true;if(typeof WebAssembly!="object"){abort("no native wasm support detected")}var wasmMemory;var ABORT=false;var EXITSTATUS;var HEAP8,HEAPU8,HEAP16,HEAPU16,HEAP32,HEAPU32,HEAPF32,HEAPF64;function updateMemoryViews(){var b=wasmMemory.buffer;Module["HEAP8"]=HEAP8=new Int8Array(b);Module["HEAP16"]=HEAP16=new Int16Array(b);Module["HEAPU8"]=HEAPU8=new Uint8Array(b);Module["HEAPU16"]=HEAPU16=new Uint16Array(b);Module["HEAP32"]=HEAP32=new Int32Array(b);Module["HEAPU32"]=HEAPU32=new Uint32Array(b);Module["HEAPF32"]=HEAPF32=new Float32Array(b);Module["HEAPF64"]=HEAPF64=new Float64Array(b)}var wasmTable;var __ATPRERUN__=[];var __ATINIT__=[];var __ATPOSTRUN__=[];var runtimeInitialized=false;function preRun(){if(Module["preRun"]){if(typeof Module["preRun"]=="function")Module["preRun"]=[Module["preRun"]];while(Module["preRun"].length){addOnPreRun(Module["preRun"].shift())}}callRuntimeCallbacks(__ATPRERUN__)}function initRuntime(){runtimeInitialized=true;callRuntimeCallbacks(__ATINIT__)}function postRun(){if(Module["postRun"]){if(typeof Module["postRun"]=="function")Module["postRun"]=[Module["postRun"]];while(Module["postRun"].length){addOnPostRun(Module["postRun"].shift())}}callRuntimeCallbacks(__ATPOSTRUN__)}function addOnPreRun(cb){__ATPRERUN__.unshift(cb)}function addOnInit(cb){__ATINIT__.unshift(cb)}function addOnPostRun(cb){__ATPOSTRUN__.unshift(cb)}var runDependencies=0;var runDependencyWatcher=null;var dependenciesFulfilled=null;function addRunDependency(id){runDependencies++;if(Module["monitorRunDependencies"]){Module["monitorRunDependencies"](runDependencies)}}function removeRunDependency(id){runDependencies--;if(Module["monitorRunDependencies"]){Module["monitorRunDependencies"](runDependencies)}if(runDependencies==0){if(runDependencyWatcher!==null){clearInterval(runDependencyWatcher);runDependencyWatcher=null}if(dependenciesFulfilled){var callback=dLine truncated
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return moduleArg.ready
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}
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);
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})();
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if (typeof exports === 'object' && typeof module === 'object')
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module.exports = ggwave_factory;
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else if (typeof define === 'function' && define['amd'])
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define([], () => ggwave_factory);
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+190
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<!doctype html>
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<html lang="en-us">
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<head>
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<title>ggwave : javascript example</title>
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</head>
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<body>
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<div id="main-container">
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Minimal <b>ggwave</b> example using Javascript bindings
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<br><br>
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<div>Tx Data:</div> <textarea name="textarea" id="txData" style="width:300px;height:100px;">Hello javascript</textarea><br>
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<button onclick="onSend();">Send</button>
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<br><br>
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<div>Rx data:</div> <textarea name="textarea" id="rxData" style="width:300px;height:100px;" disabled></textarea><br>
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<button id="captureStart">Start capturing</button>
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<button id="captureStop" hidden>Stop capturing</button>
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<br><br>
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<div class="cell-version">
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<span>
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Build time: <span class="nav-link">@GIT_DATE@</span> |
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Commit hash: <a class="nav-link" href="https://github.com/ggerganov/ggwave/commit/@GIT_SHA1@">@GIT_SHA1@</a> |
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Commit subject: <span class="nav-link">@GIT_COMMIT_SUBJECT@</span> |
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<a class="nav-link" href="https://github.com/ggerganov/ggwave/tree/master/examples/ggwave-js">Source Code</a> |
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</span>
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</div>
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</div>
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<script type="text/javascript" src="ggwave.js"></script>
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<script type='text/javascript'>
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window.AudioContext = window.AudioContext || window.webkitAudioContext;
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window.OfflineAudioContext = window.OfflineAudioContext || window.webkitOfflineAudioContext;
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var context = null;
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var recorder = null;
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// the ggwave module instance
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var ggwave = null;
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var parameters = null;
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var instance = null;
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// instantiate the ggwave instance
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// ggwave_factory comes from the ggwave.js module
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ggwave_factory().then(function(obj) {
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ggwave = obj;
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});
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var txData = document.getElementById("txData");
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var rxData = document.getElementById("rxData");
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var captureStart = document.getElementById("captureStart");
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var captureStop = document.getElementById("captureStop");
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// helper function
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function convertTypedArray(src, type) {
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var buffer = new ArrayBuffer(src.byteLength);
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var baseView = new src.constructor(buffer).set(src);
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return new type(buffer);
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}
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// initialize audio context and ggwave
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function init() {
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if (!context) {
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context = new AudioContext({sampleRate: 48000});
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parameters = ggwave.getDefaultParameters();
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parameters.sampleRateInp = context.sampleRate;
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parameters.sampleRateOut = context.sampleRate;
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instance = ggwave.init(parameters);
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}
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}
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//
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// Tx
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//
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function onSend() {
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init();
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// pause audio capture during transmission
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captureStop.click();
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// generate audio waveform
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var waveform = ggwave.encode(instance, txData.value, ggwave.ProtocolId.GGWAVE_PROTOCOL_AUDIBLE_FAST, 10)
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// play audio
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var buf = convertTypedArray(waveform, Float32Array);
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var buffer = context.createBuffer(1, buf.length, context.sampleRate);
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buffer.getChannelData(0).set(buf);
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var source = context.createBufferSource();
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source.buffer = buffer;
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source.connect(context.destination);
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source.start(0);
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}
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//
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// Rx
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//
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captureStart.addEventListener("click", function () {
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init();
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let constraints = {
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audio: {
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// not sure if these are necessary to have
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echoCancellation: false,
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autoGainControl: false,
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noiseSuppression: false
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}
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};
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navigator.mediaDevices.getUserMedia(constraints).then(function (e) {
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mediaStream = context.createMediaStreamSource(e);
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var bufferSize = 1024;
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var numberOfInputChannels = 1;
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var numberOfOutputChannels = 1;
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if (context.createScriptProcessor) {
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recorder = context.createScriptProcessor(
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bufferSize,
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numberOfInputChannels,
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numberOfOutputChannels);
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} else {
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recorder = context.createJavaScriptNode(
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bufferSize,
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numberOfInputChannels,
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numberOfOutputChannels);
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}
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recorder.onaudioprocess = function (e) {
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var source = e.inputBuffer;
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var res = ggwave.decode(instance, convertTypedArray(new Float32Array(source.getChannelData(0)), Int8Array));
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if (res && res.length > 0) {
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res = new TextDecoder("utf-8").decode(res);
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rxData.value = res;
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}
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// obsolete javascript resampling
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// since ggwave v0.2.0 the resampling is built-in ggwave
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//var offlineCtx = new OfflineAudioContext(source.numberOfChannels, 48000*source.duration, 48000);
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//var offlineSource = offlineCtx.createBufferSource();
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//offlineSource.buffer = source;
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//offlineSource.connect(offlineCtx.destination);
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//offlineSource.start();
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//offlineCtx.startRendering();
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//offlineCtx.oncomplete = function(e) {
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// var resampled = e.renderedBuffer.getChannelData(0);
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// var res = ggwave.decode(instance, convertTypedArray(new Float32Array(resampled), Int8Array));
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// if (res) {
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// rxData.value = res;
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// }
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//};
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}
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mediaStream.connect(recorder);
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recorder.connect(context.destination);
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}).catch(function (e) {
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console.error(e);
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});
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rxData.value = 'Listening ...';
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captureStart.hidden = true;
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captureStop.hidden = false;
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});
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captureStop.addEventListener("click", function () {
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if (recorder) {
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recorder.disconnect(context.destination);
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mediaStream.disconnect(recorder);
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recorder = null;
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}
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rxData.value = 'Audio capture is paused! Press the "Start capturing" button to analyze audio from the microphone';
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captureStart.hidden = false;
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captureStop.hidden = true;
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});
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captureStop.click();
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</script>
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</body>
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</html>
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