adding a test for router

GoogleChrome · Aug 2, 2016 · e987d59 · e987d59
1 parent aab09c9
commit e987d59
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Showing 8 changed files with 133 additions and 11 deletions.
diff --git a/.gitignore b/.gitignore
@@ -1,3 +1,4 @@
 .DS_Store
+bower_components/
 node_modules/
 temp/
diff --git a/bower.json b/bower.json
@@ -11,7 +11,7 @@
     "ambisonic",
     "VR audio",
     "360 audio",
-    "spatial audio",    
+    "spatial audio",
     "Web Audio API"
   ],
   "homepage": "https://github.com/GoogleChrome/omnitone",
@@ -21,5 +21,9 @@
     "bower_components",
     "test",
     "tests"
-  ]
+  ],
+  "devDependencies": {
+    "mocha": "^3.0.0",
+    "chai": "^3.5.0"
+  }
 }
diff --git a/build/omnitone.min.js b/build/omnitone.min.js
diff --git a/src/foa-router.js b/src/foa-router.js
@@ -13,30 +13,33 @@
  * limitations under the License.
  */
 
+'use strict';
+
 /**
  * @fileOverview An audio channel re-router to resolve different channel layouts
  *               between various platforms.
  */
 
-'use strict';
 
-var CHROME_CHANNEL_MAP = [0, 1, 2, 3];
-var ISO_CHANNEL_MAP = [2, 0, 1, 3];
+var DEFAULT_CHANNEL_MAP = [0, 1, 2, 3];
+
+var IOS_CHANNEL_MAP = [2, 0, 1, 3];
+var FUMA_2_ACN_CHANNEL_MAP = [0, 3, 1, 2];
 
 /**
  * @class A simple channel re-router.
  * @param {AudioContext} context      Associated AudioContext.
  * @param {Array} channelMap  Routing destination array.
  *                                    e.g.) Chrome: [0, 1, 2, 3],
- *                                    iOS: [1, 2, 0, 3]
+ *                                    iOS: [2, 0, 1, 3]
  */
 function FOARouter (context, channelMap) {
   this._context = context;
 
   this._splitter = this._context.createChannelSplitter(4);
   this._merger = this._context.createChannelMerger(4);
 
-  this._channelMap = channelMap || CHROME_CHANNEL_MAP;
+  this._channelMap = channelMap || DEFAULT_CHANNEL_MAP;
 
   this._splitter.connect(this._merger, 0, this._channelMap[0]);
   this._splitter.connect(this._merger, 1, this._channelMap[1]);
@@ -48,7 +51,7 @@ function FOARouter (context, channelMap) {
   this.output = this._merger;
 }
 
-FOARouter.prototype.setchannelMap = function (channelMap) {
+FOARouter.prototype.setChannelMap = function (channelMap) {
   if (!channelMap)
     return;
 

diff --git a/src/omnitone.js b/src/omnitone.js
@@ -73,8 +73,8 @@ Omnitone.loadAudioBuffers = function (context, speakerData) {
  * Router class.
  * @return {Object}
  */
-Omnitone.createFOARouter = function (context, options) {
-  return new FOARouter(context, options);
+Omnitone.createFOARouter = function (context, channelMap) {
+  return new FOARouter(context, channelMap);
 };
 
 /**

diff --git a/test/index.html b/test/index.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Omnitone Unit Tests</title>
+  <link rel="stylesheet" href="../bower_components/mocha/mocha.css" />
+</head>
+<body>
+  <div id="mocha"></div>
+  <div id="messages"></div>
+  <div id="fixtures"></div>
+  <script src="../bower_components/chai/chai.js"></script>
+  <script src="../bower_components/mocha/mocha.js"></script>
+  <script src="../build/omnitone.min.js"></script>
+  <script src="test-setup.js"></script>
+  <script>mocha.setup('bdd')</script>
+  <script src="test-router.js"></script>
+  <script>mocha.run();</script>
+</body>
+</html>
diff --git a/test/test-router.js b/test/test-router.js
@@ -0,0 +1,59 @@
+/**
+ * Copyright 2016 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+describe('FOARouter', function () {
+
+  it('Should route incoming channels according to the channel map correctly.', 
+      function (done) {
+        var sampleRate = 48000;
+        var renderLength = 0.1 * sampleRate;
+        var context = new OfflineAudioContext(4, renderLength, sampleRate);
+
+        var testBuffer = context.createBuffer(4, renderLength, sampleRate);
+        for (var c = 0; c < testBuffer.numberOfChannels; c++) {
+          var channelData = testBuffer.getChannelData(c);
+          for (var i = 0; i < channelData.length; i++) {
+            channelData[i] = c;
+          }
+        }
+
+        var router = Omnitone.createFOARouter(context, [1, 2, 0, 3]);
+        var source = context.createBufferSource();
+        source.buffer = testBuffer;
+
+        source.connect(router.input);
+        router.output.connect(context.destination);
+        source.start();
+
+        // With the router configuration above, this is what must be rendered.
+        //   Channel #0: value [0] => (to channel #1) => value [2]
+        //   Channel #1: value [1] => (to channel #2) => value [0]
+        //   Channel #2: value [2] => (to channel #0) => value [1]
+        //   Channel #3: value [3] => (to channel #3) => value [3]
+        var expectedValues = [2, 0, 1, 3];
+        var passed = false;
+        context.startRendering().then(function (renderedBuffer) {
+          for (c = 0; c < renderedBuffer.numberOfChannels; c++) {
+            passed = isConstantValueOf(
+              renderedBuffer.getChannelData(c), expectedValues[c]);
+            expect(passed).to.equal(true);
+          }
+          done();
+        });
+      }
+  );
+
+});
diff --git a/test/test-setup.js b/test/test-setup.js
@@ -0,0 +1,35 @@
+/**
+ * Copyright 2016 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+var expect = chai.expect;
+var should = chai.should();
+
+
+/**
+ * Check if the array is filled with the specified value only.
+ * @param  {Float32Array} channelData The target array for testing.
+ * @param  {Number} value             A value for the testing.
+ * @return {Boolean}
+ */
+function isConstantValueOf(channelData, value) {
+  var mismatches = {};
+  for (var i = 0; i < channelData.length; i++) {
+      if (channelData[i] !== value)
+      mismatches[i] = channelData[i];
+  }
+
+  var numberOfmismatches = Object.keys(mismatches).length;
+  return numberOfmismatches === 0;
+};