update README

README.md

@@ -1 +1,109 @@
 # web-audio-mock
+[![NPM Version](http://img.shields.io/npm/v/web-audio-mock.svg?style=flat)](https://www.npmjs.org/package/web-audio-mock)
+[![Build Status](http://img.shields.io/travis/mohayonao/web-audio-mock.svg?style=flat)](https://travis-ci.org/mohayonao/web-audio-mock)
+[![Coverage Status](http://img.shields.io/coveralls/mohayonao/web-audio-mock.svg?style=flat)](https://coveralls.io/r/mohayonao/web-audio-mock?branch=master)
+[![Dependency Status](http://img.shields.io/david/mohayonao/web-audio-mock.svg?style=flat)](https://david-dm.org/mohayonao/web-audio-mock)
+[![devDependency Status](http://img.shields.io/david/dev/mohayonao/web-audio-mock.svg?style=flat)](https://david-dm.org/mohayonao/web-audio-mock)
+
+> Web Audio API mock library for node.js
+
+## Installing
+
+##### node.js
+
+```sh
+% npm install web-audio-mock
+```
+
+## Usage
+
+##### Module Routing
+
+```javascript
+require("./web-audio-mock");
+
+var ctx = new AudioContext();
+var osc = ctx.createOscillator();
+var amp = ctx.createGain();
+
+osc.type = "sawtooth";
+osc.frequency.value = 220;
+
+osc.connect(amp);
+amp.connect(ctx.destination);
+
+ctx.toJSON();
+
+{
+  "name": "AudioDestinationNode",
+  "inputs": [
+    {
+      "name": "GainNode",
+      "gain": {
+        "name": "gain",
+        "value": 1,
+        "inputs": []
+      },
+      "inputs": [
+        {
+          "name": "OscillatorNode",
+          "type": "sawtooth",
+          "frequency": {
+            "name": "frequency",
+            "value": 220,
+            "inputs": []
+          },
+          "detune": {
+            "name": "detune",
+            "value": 0,
+            "inputs": []
+          },
+          "inputs": []
+        }
+      ]
+    }
+  ]
+}
+```
+
+##### DecodeAudioData
+
+```javascript
+var ctx = new AudioContext();
+
+it("AudioContext#decodeAudioData", function(done) {
+
+  // ctx.DECODE_AUDIO_DATA_FAILED = true;
+
+  ctx.decodeAudioData(buffer, function(e) {
+    done();
+  }, function() {
+    // failed
+  });
+
+});
+```
+
+##### ScriptProcessing
+
+```javascript
+var ctx = new AudioContext();
+
+it("ScriptProcessorNode#onaudioprocess", function(done) {
+  var scp = ctx.createScriptProcessor(1024, 2, 2);
+  var count = 0;
+
+  scp.onaudioprocess = function(e) {
+    count += 1;
+    if (count === 5) {
+      done();
+    }
+  };
+
+  ctx.process(0.5); // process 0.5sec
+});
+```
+
+## License
+
+web-audio-mock is available under the The MIT License.