From bd429ec3628e0452a4d87b3c6405d59ae50dc47b Mon Sep 17 00:00:00 2001
From: Matthias Jauernig <matthias.jauernig@partner.commerzbank.com>
Date: Tue, 22 Mar 2016 10:36:19 +0100
Subject: [PATCH] added config 'cameraIndex' to select the camera by index

---
 src/input/camera_access.js | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/src/input/camera_access.js b/src/input/camera_access.js
index da20d61..5d7ef74 100644
--- a/src/input/camera_access.js
+++ b/src/input/camera_access.js
@@ -84,11 +84,19 @@ function normalizeConstraints(config, cb) {
 
     if ( typeof MediaStreamTrack !== 'undefined' && typeof MediaStreamTrack.getSources !== 'undefined') {
         MediaStreamTrack.getSources(function(sourceInfos) {
-            var videoSourceId;
+            var videoSourceId, facingDetected, videoIndex = 0;
             for (var i = 0; i < sourceInfos.length; ++i) {
                 var sourceInfo = sourceInfos[i];
-                if (sourceInfo.kind === "video" && sourceInfo.facing === videoConstraints.facing) {
-                    videoSourceId = sourceInfo.id;
+                if (sourceInfo.kind === "video" && !facingDetected) {
+                    if (sourceInfo.facing === videoConstraints.facing) {
+                        facingDetected = true;
+                    }
+                    
+                    if (!config.cameraIndex || config.cameraIndex <= videoIndex) {
+                        videoSourceId = sourceInfo.id;
+                    }
+                    
+                    videoIndex++;
                 }
             }
             constraints.video = {