feat: add a volume parameter, setup semantic release

.gitignore

@@ -0,0 +1 @@
+node_modules/

.travis.yml

@@ -0,0 +1,12 @@
+language: node_js
+node_js:
+    "node"
+cache:
+  directories:
+    - node_modules
+after_success:
+  - npm run semantic-release
+branches:
+  except:
+    # ignore git tags created by semantic-release, like "v1.2.3"
+    - /^v\d+\.\d+\.\d+$/

README.md

@@ -1,15 +1,22 @@
 ToneGenerator for node.js
 ====
 
-This thing generates raw PCM data, specified by 
+This thing generates raw PCM data, specified by
 a frequency and length in seconds.
 
+```javascript
+tone(frequency, lengthInSeconds, [volumen])
+```
+
 ```javascript
 var tone = require("tonegenerator");
-var A440 = tone(440, 20); // get PCM data for a 440hz A, 20 seconds.
+var A440 = tone(440, 20, 30); // get PCM data for a 440hz A, 20 seconds, volume 30
 ```
 
-The data is returned as a normal array, so you can do operations on it. 
+I'm really unsure what the 'volume' value means, but you can use it to create
+different tones with different volumes, let me know how it works for you!
+
+The data is returned as a normal array, so you can do operations on it.
 Before writing to a file, you need to convert it to a buffer:
 
 ```javascript
@@ -18,12 +25,12 @@ var header = require("waveheader"); // https://www.npmjs.org/package/waveheader
 var fs = require("fs");
 
 // An A-major chord
-var tone1 = tone(440, 2);
-var tone2 = tone(554.37, 2);
-var tone3 = tone(659.26, 2);
+var tone1 = tone(440, 2, 60);
+var tone2 = tone(554.37, 2, 30);
+var tone3 = tone(659.26, 2, 30);
 
 // "playing" one tone at the time
-// note that at this time, our sound is just an array 
+// note that at this time, our sound is just an array
 // of gain values. By appending the raw PCM data for one after another,
 // we can play them in a sequence
 var res = [].concat(tone1);

index.js

@@ -1,6 +1,6 @@
 /*
  * ToneGenerator for node.js
- * generates raw PCM data for a tone, 
+ * generates raw PCM data for a tone,
  * specify length and frequency
  */
 function generateCycle(cycle, volume) {
@@ -13,12 +13,12 @@ function generateCycle(cycle, volume) {
   return data;
 }
 
-module.exports = function(freq, lengthInSecs) {
+module.exports = function(freq, lengthInSecs, volume) {
   freq = freq || 440;
   lengthInSecs = lengthInSecs || 2.0;
+  volume = volume || 30
 
   var cycle = Math.floor(44100/freq);
-  var volume = 30;
   var samplesLeft = lengthInSecs * 44100;
   var cycles = samplesLeft/cycle;
   var ret = [];

package.json

@@ -1,17 +1,29 @@
 {
   "name": "tonegenerator",
   "description": "Generates a tone as raw PCM WAV data, so you can do operations on it",
-  "version": "0.0.2",
+  "version": "0.0.0-semantically-released",
+  "scripts": {
+    "test": "node test.js",
+    "semantic-release": "semantic-release pre && npm publish && semantic-release post"
+  },
   "author": {
     "name": "Karl Westin",
     "email": "[email protected]"
   },
-  "repository" : { 
-    "type" : "git", 
-    "url" : "https://github.com/karlwestin/node-tonegenerator.git"
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/karlwestin/node-tonegenerator.git"
+  },
+  "keywords": [
+    "audio",
+    "tone",
+    "frequency",
+    "wav",
+    "pcm"
+  ],
+  "devDependencies": {
+    "semantic-release": "^4.3.5"
   },
-  "keywords": ["audio", "tone", "frequency", "wav", "pcm"],
-  "dependencies": {},
   "main": "./index.js",
   "readmeFilename": "README.md"
 }

test.js

@@ -0,0 +1,17 @@
+var assert = require('assert')
+var tonegenerator = require('./')
+
+console.log('Testing Tonegenerator...')
+
+
+var tone1 = tonegenerator(440, 2, 10)
+var tone2 = tonegenerator(440, 2, 30)
+
+assert(Array.isArray(tone1), 'Data is an array')
+
+assert.strictEqual(Math.max.apply(Math, tone1), 10, 'takes the volume argument as max')
+assert.strictEqual(Math.min.apply(Math, tone1), -10, 'takes the volume argument as max')
+
+assert.strictEqual(Math.max.apply(Math, tone2), 30, 'takes the volume argument as max')
+
+console.log('...done')