mirror of
https://github.com/samirkumardas/pcm-player.git
synced 2025-04-16 15:21:24 +02:00
unit test updated
This commit is contained in:
Samir
parent
f65222fc73
commit
aaa272eda5
13 changed files with 333 additions and 87 deletions
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@ -1,8 +1 @@
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git clone git@gitlab.ipvisionsoft.com:ipvision-web/liveplayer.git
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cd liveplayer
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npm run build
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npm run start
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Coming soon
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@ -5,42 +5,30 @@
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<title>Opus to PCM</title>
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</head>
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<body>
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<div id="container" style="width: 400px; margin: 0 auto; font-size: 30px;">
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It should play audio if everying went well!
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<div id="container" style="width: 400px; margin: 0 auto;">
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<h2>It should play audio if everying went well!</h2>
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<p>Yea! recoreded audio is not in good qualtity though! </p>
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</div>
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<script>
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window.onload = function() {
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var orgSampleRate = 8000,
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channels = 1,
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configFlag = false,
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socketURL = 'ws://localhost:8080';
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var channels = 1,
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socketURL = 'ws://localhost:8080';
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var decoder = new Decoder.OpusToPCM({
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channels: channels
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});
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var player = new PCMPlayer();
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decoder.on('decode', function(pcmData) {
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player.feed(pcmData);
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});
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var player = new PCMPlayer(channels, decoder.getSampleRate());
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var ws = new WebSocket(socketURL);
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ws.binaryType = 'arraybuffer';
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ws.addEventListener('message',function(event) {
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var data = new Uint8Array(event.data);
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decoder.decode(data).then(function(pcmData) {
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/*
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Sample rate in opus is not fixed.
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It can vary depending on hardware rate. But
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we need sample rate for playing PCM data using audio context,
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so lets set sampelRate here returned by decoder.
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*/
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if (!configFlag) {
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var samppleRate = decoder.getSampleRate();
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player.setConfig(samppleRate, channels);
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configFlag = true;
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}
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player.feed(pcmData);
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});
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decoder.decode(data);
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});
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}
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</script>
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58
example/player/pcm-player.js
Normal file
58
example/player/pcm-player.js
Normal file
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@ -0,0 +1,58 @@
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function PCMPlayer() {
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this.samples = [];
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this.flushingTime = 200;
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this.createContext();
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this.startFlushing();
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this.flush = this.flush.bind(this);
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this.interval = setInterval(this.flush, this.flushingTime);
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this.setConfig = function(sampleRate, channels) {
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this.sampleRate = sampleRate;
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this.channels = channels;
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}
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this.createContext = function() {
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this.audioCtx = new (window.AudioContext || window.webkitAudioContext)();
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this.gainNode = this.audioCtx.createGain();
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this.gainNode.gain.value = 1;
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this.gainNode.connect(this.audioCtx.destination);
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};
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this.stopFlushing = function() {
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if (this.interval) {
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clearInterval(this.interval);
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}
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}
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this.feed = function(data) {
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let tmp = new Float32Array(this.samples.length + data.length);
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tmp.set(this.samples, 0);
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tmp.set(data, this.samples.length);
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this.samples = tmp;
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}
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this.flush = function() {
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let bufferSource = this.audioCtx.createBufferSource(),
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length = this.samples.length,
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audioBuffer = this.audioCtx.createBuffer(this.channels, length, this.sampleRate),
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audioData,
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channel,
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offset,
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i;
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for (channel = 0; channel < this.channels; channel++) {
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audioData = audioBuffer.getChannelData(channel);
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offset = channel;
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for (i = 0; i < length; i++) {
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audioData[i] = this.samples[offset];
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offset += this.channels;
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}
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}
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bufferSource.buffer = audioBuffer;
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bufferSource.connect(this.gainNode);
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bufferSource.start();
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this.samples = [];
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}
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}
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@ -1,12 +1,9 @@
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function PCMPlayer() {
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function PCMPlayer(channels, sampleRate) {
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this.samples = new Float32Array();
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this.flushingTime = 200;
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this.setConfig = function(sampleRate, channels) {
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this.sampleRate = sampleRate;
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this.channels = channels;
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};
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this.channels = channels;
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this.sampleRate = sampleRate;
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this.createContext = function() {
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this.audioCtx = new (window.AudioContext || window.webkitAudioContext)();
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77
karma.conf.js
Normal file
77
karma.conf.js
Normal file
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@ -0,0 +1,77 @@
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// Karma configuration
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// Generated on Fri Nov 03 2017 16:10:03 GMT+0600 (+06)
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module.exports = function(config) {
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config.set({
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// base path that will be used to resolve all patterns (eg. files, exclude)
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basePath: '',
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// frameworks to use
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// available frameworks: https://npmjs.org/browse/keyword/karma-adapter
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frameworks: ['mocha'],
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// list of files / patterns to load in the browser
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files: [
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'test/*.js'
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],
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// list of files to exclude
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exclude: [
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],
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// preprocess matching files before serving them to the browser
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// available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
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preprocessors: {
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'test/*.js': ['rollup']
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},
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rollupPreprocessor: {
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plugins: [
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require('rollup-plugin-node-globals')(),
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require('rollup-plugin-node-builtins')(),
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require('rollup-plugin-babel')()
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],
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format: 'iife', // Helps prevent naming collisions.
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name: 'Decoder', // Required for 'iife' format.
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sourcemap: 'inline' // Sensible for testing.
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},
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// test results reporter to use
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// possible values: 'dots', 'progress'
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// available reporters: https://npmjs.org/browse/keyword/karma-reporter
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reporters: ['progress'],
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// web server port
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port: 9876,
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// enable / disable colors in the output (reporters and logs)
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colors: true,
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// level of logging
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// possible values: config.LOG_DISABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
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logLevel: config.LOG_INFO,
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// enable / disable watching file and executing tests whenever any file changes
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autoWatch: false,
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// start these browsers
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// available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
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browsers: ['Chrome'],
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// Continuous Integration mode
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// if true, Karma captures browsers, runs the tests and exits
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singleRun: true,
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// Concurrency level
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// how many browser should be started simultaneous
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concurrency: Infinity
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})
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}
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19
package.json
19
package.json
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@ -1,12 +1,12 @@
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{
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"name": "opsu-to-pcm",
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"name": "opus-to-pcm",
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"version": "0.1.0",
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"description": "Decode raw opus packet to pcm without using any external library",
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"main": "dist/opus_to_pcm.js",
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"scripts": {
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"build": "rollup -c",
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"pro": "NODE_ENV=production rollup -c",
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"test": "echo \"Error: no test specified\" && exit 1"
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"test": "karma start karma.conf.js"
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},
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"repository": {
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"type": "git",
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@ -16,13 +16,22 @@
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"devDependencies": {
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"babel-plugin-external-helpers": "^6.22.0",
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"babel-preset-es2015": "^6.24.1",
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"babel-register": "^6.26.0",
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"karma": "^1.7.1",
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"karma-chrome-launcher": "^2.2.0",
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"karma-mocha": "^1.3.0",
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"karma-rollup-preprocessor": "^5.0.1",
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"mocha": "^4.0.1",
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"path": "^0.12.7",
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"rollup": "^0.39.0",
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"rollup": "^0.50.0",
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"rollup-plugin-babel": "^2.7.1",
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"rollup-plugin-buble": "^0.16.0",
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"rollup-plugin-eslint": "^3.0.0",
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"rollup-plugin-node-builtins": "^2.1.2",
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"rollup-plugin-node-globals": "^1.1.0",
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"rollup-plugin-node-resolve": "^3.0.0",
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"rollup-plugin-replace": "^1.1.1",
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"rollup-plugin-uglify": "^1.0.1"
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},
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"dependencies": {
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}
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"dependencies": {}
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}
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@ -6,13 +6,14 @@ import eslint from 'rollup-plugin-eslint';
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import replace from 'rollup-plugin-replace';
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import uglify from 'rollup-plugin-uglify';
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export default {
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entry: 'src/opus-to-pcm.js',
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dest: 'dist/opus_to_pcm.js',
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format: 'iife',
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moduleName: 'Decoder',
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sourceMap: false, //inline
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input: 'src/opus-to-pcm.js',
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output: {
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file: 'dist/opus_to_pcm.js',
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format: 'iife',
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name: 'Decoder',
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sourcemap: false, //inline
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},
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plugins: [
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eslint(),
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babel({
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@ -1,9 +1,11 @@
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import { appendByteArray } from './utils/utils.js';
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import Event from './utils/event.js';
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import Ogg from './utils/ogg.js';
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import OpusWorker from './utils/opus-worker.js';
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export class OpusToPCM {
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export class OpusToPCM extends Event {
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constructor(options) {
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super('decoder');
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window.MediaSource = window.MediaSource || window.WebKitMediaSource;
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let nativeSupport = !!(window.MediaSource && window.MediaSource.isTypeSupported('audio/webm; codecs=opus'));
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let defaults = {
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@ -19,20 +21,29 @@ export class OpusToPCM {
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} else {
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this.decoder = null;
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}
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if (this.decoder) {
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this.decoder.on('data', this.onData.bind(this));
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}
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}
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getSampleRate() {
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return this.decoder.getSampleRate();
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}
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onData(data) {
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this.dispatch('decode', data);
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}
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decode(packet) {
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if (!this.decoder) {
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throw ('opps! no decoder is found to decode');
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}
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return this.decoder.decode(packet);
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this.decoder.decode(packet);
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}
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destroy() {
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this.decoder.destroy();
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this.offAll();
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}
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}
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39
src/utils/event.js
Normal file
39
src/utils/event.js
Normal file
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@ -0,0 +1,39 @@
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export default class Event {
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constructor(type) {
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this.listener = {};
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this.type = type | '';
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}
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on(event, fn) {
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if (!this.listener[event]) {
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this.listener[event] = [];
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}
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this.listener[event].push(fn);
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return true;
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}
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off(event, fn) {
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if (this.listener[event]) {
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var index = this.listener[event].indexOf(fn);
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if (index > -1) {
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this.listener[event].splice(index, 1);
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}
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return true;
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}
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return false;
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}
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offAll() {
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this.listener = {};
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}
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dispatch(event, data) {
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if (this.listener[event]) {
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this.listener[event].map((each) => {
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each.apply(null, [data]);
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});
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return true;
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}
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return false;
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}
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}
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@ -1,15 +1,17 @@
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import Event from './event.js';
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import { appendByteArray } from './utils.js';
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export default class Ogg {
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export default class Ogg extends Event {
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constructor(channel) {
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this.outSampleRate = 0;
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super('ogg');
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this.channel = channel;
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this.audioCtx = new (window.AudioContext || window.webkitAudioContext)();
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this.resolver = null;
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this.queue = [];
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this.flushLimit = 20; /* the larger flush limit, the lesser clicking noise */
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this.init();
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}
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getSampleRate() {
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return this.outSampleRate;
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return this.audioCtx.sampleRate;
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}
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init() {
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@ -42,19 +44,18 @@ export default class Ogg {
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dv.setUint16( 10, 0, true ); // pre-skip, don't need to skip any value
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dv.setUint32( 12, 8000, true ); // original sample rate, any valid sample e.g 8000
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dv.setUint16( 16, 0, true ); // output gain
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dv.setUint8( 18, 0, true ); // channel map 0 = mono or stereo
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dv.setUint8( 18, 0, true ); // channel map 0 = one stream: mono or stereo
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return data;
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}
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getCommentHeader() {
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let data = new Uint8Array(24),
|
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let data = new Uint8Array(20),
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dv = new DataView(data.buffer);
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dv.setUint32( 0, 1937076303, true ); // Magic Signature 'Opus'
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dv.setUint32( 4, 1936154964, true ); // Magic Signature 'Tags'
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dv.setUint32( 8, 8, true ); // Vendor Length
|
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dv.setUint32( 12, 1919512167, true ); // Vendor name 'ring'
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dv.setUint32( 16, 1818850917, true ); // Vendor name 'live'
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dv.setUint32( 20, 0, true ); // User Comment List Length
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dv.setUint32( 8, 4, true ); // Vendor Length
|
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dv.setUint32( 12, 1633837924, true ); // Vendor name 'abcd'
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dv.setUint32( 16, 0, true ); // User Comment List Length
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return data;
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}
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@ -84,12 +85,19 @@ export default class Ogg {
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return page;
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}
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getOGG(packet) {
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getOGG() {
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let oggData = this.oggHeader,
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segmentData;
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packet,
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segmentData,
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headerType;
|
||||
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while (this.queue.length) {
|
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packet = this.queue.shift();
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headerType = this.queue.length == 0 ? 4 : 0; // for last packet, header type should be end of stream
|
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segmentData = this.getPage(packet, headerType);
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oggData = appendByteArray(oggData, segmentData);
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}
|
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|
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segmentData = this.getPage(packet, 4); /* headerType - end of stream i.e 4 */
|
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oggData = appendByteArray(oggData, segmentData);
|
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this.pageIndex = 2; /* reseting pageIndex to 2 so we can re-use same header */
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return oggData;
|
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}
|
||||
|
|
@ -114,27 +122,28 @@ export default class Ogg {
|
|||
}
|
||||
|
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decode(packet) {
|
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let ogg = this.getOGG(packet);
|
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return new Promise((resolve) => {
|
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this.audioCtx.decodeAudioData(ogg.buffer, (audioBuffer) => {
|
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let pcmFloat;
|
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this.queue.push(packet);
|
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if (this.queue.length >= this.flushLimit) {
|
||||
this.process();
|
||||
}
|
||||
}
|
||||
|
||||
if (!this.outSampleRate) {
|
||||
this.outSampleRate = audioBuffer.sampleRate;
|
||||
}
|
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if (this.channel == 1) {
|
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pcmFloat = audioBuffer.getChannelData(0);
|
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} else {
|
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pcmFloat = this.getMergedPCMData(audioBuffer);
|
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}
|
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resolve(pcmFloat);
|
||||
});
|
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process() {
|
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let ogg = this.getOGG();
|
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this.audioCtx.decodeAudioData(ogg.buffer, (audioBuffer) => {
|
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let pcmFloat;
|
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if (this.channel == 1) {
|
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pcmFloat = audioBuffer.getChannelData(0);
|
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} else {
|
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pcmFloat = this.getMergedPCMData(audioBuffer);
|
||||
}
|
||||
this.dispatch('data', pcmFloat);
|
||||
});
|
||||
}
|
||||
|
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getMergedPCMData(audioBuffer) {
|
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let audioData,
|
||||
result,
|
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result = [],
|
||||
length,
|
||||
pcmFloat,
|
||||
offset = 0,
|
||||
|
|
@ -148,6 +157,7 @@ export default class Ogg {
|
|||
|
||||
length = result[0].length;
|
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pcmFloat = new Float32Array(this.channel * length);
|
||||
i = 0;
|
||||
while(length > i) {
|
||||
for(j=0; j<this.channel; j++) {
|
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pcmFloat[offset++] = result[j][i];
|
||||
|
|
@ -161,5 +171,6 @@ export default class Ogg {
|
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this.oggHeader = null;
|
||||
this.audioCtx = null;
|
||||
this.checksumTable = null;
|
||||
this.offAll();
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,7 +1,8 @@
|
|||
export default class OpusWorker {
|
||||
import Event from './event.js';
|
||||
export default class OpusWorker extends Event {
|
||||
constructor(channels) {
|
||||
super('worker');
|
||||
this.worker = new Worker('libopus/opus.min.js');
|
||||
this.resolver = null;
|
||||
this.worker.addEventListener('message', this.onMessage.bind(this));
|
||||
this.worker.postMessage({
|
||||
type: 'init',
|
||||
|
|
@ -22,18 +23,14 @@ export default class OpusWorker {
|
|||
buffer: packet
|
||||
};
|
||||
this.worker.postMessage(workerData);
|
||||
return new Promise((resolve) => {
|
||||
this.resolver = resolve;
|
||||
});
|
||||
}
|
||||
|
||||
onMessage(event) {
|
||||
let data = event.data;
|
||||
if (this.resolver) {
|
||||
this.resolver(data.buffer);
|
||||
}
|
||||
this.dispatch('data', data.buffer);
|
||||
}
|
||||
destroy() {
|
||||
this.worker = null;
|
||||
this.offAll();
|
||||
}
|
||||
}
|
||||
|
|
|
|||
31
test/event.js
Normal file
31
test/event.js
Normal file
|
|
@ -0,0 +1,31 @@
|
|||
import {equal, deepEqual} from 'assert';
|
||||
import Event from '../src/utils/event.js';
|
||||
|
||||
var event = new Event('XYZ');
|
||||
|
||||
var callback = function() {
|
||||
};
|
||||
|
||||
describe('event tests --', function() {
|
||||
|
||||
beforeEach(function(){
|
||||
event.offAll();
|
||||
event.on('topic1',callback);
|
||||
event.on('topic1',callback);
|
||||
event.on('topic2',callback);
|
||||
});
|
||||
|
||||
it('listener should be 2 for the topic1', function() {
|
||||
equal(event.listener.topic1.length, 2);
|
||||
});
|
||||
|
||||
it('event dispatcher should be return true for a successful dispatcher', function() {
|
||||
equal(event.dispatch('topic1', true), true);
|
||||
});
|
||||
|
||||
it('listener should be zero after removing all listeners', function() {
|
||||
event.offAll();
|
||||
deepEqual(event.listener, {});
|
||||
});
|
||||
});
|
||||
|
||||
34
test/ogg.js
Normal file
34
test/ogg.js
Normal file
|
|
@ -0,0 +1,34 @@
|
|||
import {equal} from 'assert';
|
||||
import Ogg from '../src/utils/ogg.js';
|
||||
var channel = 1,
|
||||
decoder = new Ogg(channel),
|
||||
audioCtx = new (window.AudioContext || window.webkitAudioContext)(),
|
||||
sampleRate = audioCtx.sampleRate;
|
||||
|
||||
|
||||
describe('Ogg tests -- ', function() {
|
||||
it('sample rate should be same system sample rate', function() {
|
||||
equal(decoder.getSampleRate(), sampleRate);
|
||||
});
|
||||
|
||||
it('magic Signature of ID header should be Opus Head', function() {
|
||||
var idHeader = decoder.getIDHeader();
|
||||
var dv = new DataView(idHeader.buffer);
|
||||
equal(dv.getUint32(0, true), 1937076303);
|
||||
equal(dv.getUint32(4, true), 1684104520);
|
||||
});
|
||||
|
||||
it('magic Signature of comment header should be Opus Tags', function() {
|
||||
var commonHeader = decoder.getCommentHeader();
|
||||
var dv = new DataView(commonHeader.buffer);
|
||||
equal(dv.getUint32(0, true), 1937076303);
|
||||
equal(dv.getUint32(4, true), 1936154964);
|
||||
});
|
||||
|
||||
it('page header should be started with OggS', function() {
|
||||
var segmentData = new Uint8Array(20);
|
||||
var page = decoder.getPage(segmentData, 4);
|
||||
var dv = new DataView(page.buffer);
|
||||
equal(dv.getUint32(0, true), 1399285583);
|
||||
});
|
||||
});
|
||||
Loading…
Add table
Reference in a new issue