Merge pull request #879 from jijojosephk/issue-664

#664

app/browser/index.js

@@ -90,6 +90,9 @@ function initializeModules(config, ipcRenderer) {
 	require('./tools/zoom').init(config);
 	require('./tools/shortcuts').init(config);
 	require('./tools/chromeApi');
+	if (config.disableAutogain) {
+		require('./tools/disableAutogain')();
+	}
 	require('./tools/settings').init(config, ipcRenderer);
 	require('./tools/customBackgrounds')(config, ipcRenderer);
 }

app/browser/tools/disableAutogain.js

@@ -0,0 +1,80 @@
+let disableAutogain = function () {
+	function setLegacyChromeConstraint(constraint, name, value) {
+		if (constraint.mandatory && name in constraint.mandatory) {
+			constraint.mandatory[name] = value;
+			return;
+		}
+		if (constraint.optional) {
+			const element = constraint.optional.find(opt => name in opt);
+			if (element) {
+				element[name] = value;
+				return;
+			}
+		}
+		// `mandatory` options throw errors for unknown keys, so avoid that by
+		// setting it under optional.
+		if (!constraint.optional) {
+			constraint.optional = [];
+		}
+		constraint.optional.push({ [name]: value });
+	}
+	function setConstraint(constraint, name, value) {
+		if (constraint.advanced) {
+			const element = constraint.advanced.find(opt => name in opt);
+			if (element) {
+				element[name] = value;
+				return;
+			}
+		}
+		constraint[name] = value;
+	}
+	function disableAutogain(constraints) {
+		console.log('Automatically unsetting gain!', constraints);
+		if (constraints && constraints.audio) {
+			if (typeof constraints.audio !== 'object') {
+				constraints.audio = {};
+			}
+			if (constraints.audio.optional || constraints.audio.mandatory) {
+				setLegacyChromeConstraint(constraints.audio, 'googAutoGainControl', false);
+				setLegacyChromeConstraint(constraints.audio, 'googAutoGainControl2', false);
+			} else {
+				setConstraint(constraints.audio, 'autoGainControl', false);
+			}
+		}
+	}
+
+	function patchFunction(object, name, createNewFunction) {
+		if (name in object) {
+			var original = object[name];
+			object[name] = createNewFunction(original);
+		}
+	}
+
+	patchFunction(navigator.mediaDevices, 'getUserMedia', function (original) {
+		return function getUserMedia(constraints) {
+			disableAutogain(constraints);
+			return original.call(this, constraints);
+		};
+	});
+	function patchDeprecatedGetUserMedia(original) {
+		return function getUserMedia(constraints, success, error) {
+			disableAutogain(constraints);
+			return original.call(this, constraints, success, error);
+		};
+	}
+	patchFunction(navigator, 'getUserMedia', patchDeprecatedGetUserMedia);
+	patchFunction(navigator, 'mozGetUserMedia', patchDeprecatedGetUserMedia);
+	patchFunction(navigator, 'webkitGetUserMedia', patchDeprecatedGetUserMedia);
+	patchFunction(MediaStreamTrack.prototype, 'applyConstraints', function (original) {
+		return function applyConstraints(constraints) {
+			disableAutogain(constraints);
+			return original.call(this, constraints);
+		};
+	});
+	console.log(
+		'Disable Autogain by Joey Watts!',
+		navigator.mediaDevices.getUserMedia
+	);
+};
+
+module.exports = disableAutogain;

app/config/README.md

@@ -47,6 +47,7 @@ Here is the list of available arguments and its usage:
 | customBGServiceIgnoreMSDefaults | A flag indicates whether to ignore Microsoft provided images or not | false |
 | customBGServiceConfigFetchInterval | A numeric value in seconds as poll interval to download custom background service configuration. If 0, it will be downloaded only at application start | 0 |
 | menubar | A value controls the menu bar behaviour (auto/visible/hidden) | auto |
+| disableAutogain | A flag indicates whether to disable mic auto gain or not | false |
 
 
 

app/config/index.js

@@ -190,6 +190,11 @@ function argv(configPath) {
 				describe: 'A value controls the menu bar behaviour',
 				type: 'string',
 				choices: ['auto', 'visible', 'hidden']
+			},
+			disableAutogain: {
+				default: false,
+				describe: 'A flag indicates whether to disable mic auto gain or not',
+				type: 'boolean'
 			}
 		})
 		.parse(process.argv.slice(1));

package.json

@@ -1,6 +1,6 @@
 {
   "name": "teams-for-linux",
-  "version": "1.1.9",
+  "version": "1.1.10",
   "main": "app/index.js",
   "description": "Unofficial client for Microsoft Teams for Linux",
   "homepage": "https://github.com/IsmaelMartinez/teams-for-linux",