Merge pull request #6 from elderapo/master

Windows support

Author: LinusU

.gitignore

@@ -13,3 +13,4 @@ results
 node_modules
 
 npm-debug.log
+!adjust_get_current_system_volume_vista_plus.exe

impl/windows/adjust_get_current_system_volume_vista_plus.exe

@@ -0,0 +1,92 @@
+var spawn = require('child_process').spawn;
+var path = require('path');
+
+var executable = path.join(__dirname, 'adjust_get_current_system_volume_vista_plus.exe');
+
+var runProgram = function(args, done) {
+	args = args === '' ? [] : args.toString().split(' ');
+	done = done || function () {};
+
+	var ret = '';
+	var err = null;
+	var p = spawn(executable, args);
+
+	p.stdout.on('data', function (data) {
+		ret += data;
+	});
+
+	p.stderr.on('data', function (data) {
+		err = new Error('Windows Script Error: ' + data);
+	});
+
+	p.on('close', function () {
+		if (err) return done(err);
+
+		return done(null, ret.trim());
+	});
+};
+
+var getVolumeInfo = function(done) {
+	done = done || function () {};
+
+	runProgram('', function(err, strArgs) {
+		if (err) return done(err);
+
+		const args = strArgs.split(' ');
+		const info = {
+			volume: parseInt(args[0]),
+			isMuted: parseInt(args[1]) ? true : false
+		};
+
+		return done(null, info);
+	});
+};
+
+var getVolume = function(done) {
+	done = done || function () {};
+
+	getVolumeInfo(function(err, info) {
+		if (err) return done(err);
+
+		return done(null, info.volume);
+	});
+};
+
+var setVolume = function(val, done) {
+	val = val || 0;
+	done = done || function () {};
+
+	runProgram(val, function(err) {
+		if (err) return done(err);
+
+		return done(null);
+	});
+};
+
+var getMuted = function(done) {
+	done = done || function () {};
+
+	getVolumeInfo(function(err, info) {
+		if (err) return done(err);
+
+		return done(null, info.isMuted);
+	});
+};
+
+var setMuted = function(val, done) {
+	val = val ? 'mute' : 'unmute';
+	done = done || function () {};
+
+	runProgram(val, function(err) {
+		if (err) return done(err);
+
+		return done(null);
+	});
+};
+
+module.exports = {
+	getVolume: getVolume,
+	setVolume: setVolume,
+	getMuted: getMuted,
+	setMuted: setMuted
+};

impl/windows/index.js

@@ -4,10 +4,13 @@ var impl = null;
 
 switch(os.type()) {
   case 'Darwin':
-    impl = require('./impl/darwin.js');
+    impl = require('./impl/darwin');
     break;
   case 'Linux':
-    impl = require('./impl/linux.js');
+    impl = require('./impl/linux');
+    break;
+  case 'Windows_NT':
+    impl = require('./impl/windows')
     break;
   default:
     throw new Error('Your OS is currently not supported by node-loudness.');