Create preamp

js/media.js

@@ -24,6 +24,9 @@ module.exports = {
     // The _source node has to be recreated each time it's stopped or
     // paused, so we don't create it here.
 
+    // Create the preamp node
+    this._preamp = this._context.createGain();
+
     // Create the spliter node
     this._chanSplit = this._context.createChannelSplitter(2);
 
@@ -64,6 +67,8 @@ module.exports = {
     //                    |
     //               destination
 
+    this._preamp.connect(this._chanSplit);
+
     // Connect split channels to left / right gains
     this._chanSplit.connect(this._leftGain, 0);
     this._chanSplit.connect(this._rightGain, 1);
@@ -160,7 +165,7 @@ module.exports = {
       this._source = this._context.createBufferSource();
       this._source.buffer = this._buffer;
       this._source.connect(this._analyser);
-      this._source.connect(this._chanSplit);
+      this._source.connect(this._preamp);
 
       this._position = typeof position !== 'undefined' ? position : this._position;
       this._startTime = this._context.currentTime - this._position;
@@ -201,8 +206,10 @@ module.exports = {
     this._gainNode.gain.value = volume / 100;
   },
 
-  getVolume: function() {
-    return this._gainNode.gain.value * 100;
+  // From 0-1
+  setPreamp: function(value) {
+    console.log('preamp', value);
+    this._preamp.gain.value = value / 100;
   },
 
   // From -100 to 100
@@ -231,14 +238,6 @@ module.exports = {
     this.bands[band].gain.value = db;
   },
 
-  setPreamp: function() {
-    // ??
-  },
-
-  getBalance: function() {
-    return this._balance;
-  },
-
   toggleRepeat: function() {
     this._loop = !this._loop;
   },

js/winamp.js

@@ -1,7 +1,13 @@
 // UI and App logic
 import Media from './media';
 import MyFile from './myFile';
-import {setSkinFromUrl, setSkinFromFile} from './actionCreators';
+import {
+  setSkinFromUrl,
+  setSkinFromFile,
+  setVolume,
+  setPreamp,
+  setBalance
+} from './actionCreators';
 
 import '../css/winamp.css';
 
@@ -12,8 +18,9 @@ module.exports = {
     this.fileInput.type = 'file';
     this.fileInput.style.display = 'none';
 
-    this.dispatch({type: 'SET_VOLUME', volume: options.volume});
-    this.dispatch({type: 'SET_BALANCE', balance: options.balance});
+    this.dispatch(setVolume(this.media, options.volume));
+    this.dispatch(setBalance(this.media, options.balance));
+    this.dispatch(setPreamp(this.media, 50));
     this.loadFromUrl(options.mediaFile.url, options.mediaFile.name);
     this.dispatch(setSkinFromUrl(options.skinUrl));