Convert interface orientation to video orientation on iOS (#719)

* Add missing framework declarations for iOS

* Convert interface orientation to video orientation on iOS

Author: vially

plugin.xml

@@ -21,6 +21,9 @@
     <resource-file src="src/ios/scannerOverlay.xib"/>
     <resource-file src="src/ios/CDVBarcodeScanner.bundle"/>
     <source-file src="src/ios/CDVBarcodeScanner.mm"/>
+    <!-- frameworks -->
+    <framework src="AVFoundation.framework" />
+    <framework src="AudioToolbox.framework" />
   </platform>
   <platform name="android">
     <source-file src="src/android/com/phonegap/plugins/barcodescanner/BarcodeScanner.java" target-dir="src/com/phonegap/plugins/barcodescanner"/>
@@ -68,4 +71,4 @@
       <runs/>
     </js-module>
   </platform>
-</plugin>
+</plugin>

src/ios/CDVBarcodeScanner.mm

@@ -759,7 +759,7 @@ - (void)loadView {
 - (void)viewWillAppear:(BOOL)animated {
 
     // set video orientation to what the camera sees
-    self.processor.previewLayer.connection.videoOrientation = (AVCaptureVideoOrientation) [[UIApplication sharedApplication] statusBarOrientation];
+    self.processor.previewLayer.connection.videoOrientation = [self interfaceOrientationToVideoOrientation:[UIApplication sharedApplication].statusBarOrientation];
 
     // this fixes the bug when the statusbar is landscape, and the preview layer
     // starts up in portrait (not filling the whole view)
@@ -774,7 +774,7 @@ - (void)viewDidAppear:(BOOL)animated {
     previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
 
     if ([previewLayer.connection isVideoOrientationSupported]) {
-        [previewLayer.connection setVideoOrientation:[[UIApplication sharedApplication] statusBarOrientation]];
+        previewLayer.connection.videoOrientation = [self interfaceOrientationToVideoOrientation:[UIApplication sharedApplication].statusBarOrientation];
     }
 
     [self.view.layer insertSublayer:previewLayer below:[[self.view.layer sublayers] objectAtIndex:0]];
@@ -785,6 +785,21 @@ - (void)viewDidAppear:(BOOL)animated {
     [super viewDidAppear:animated];
 }
 
+- (AVCaptureVideoOrientation)interfaceOrientationToVideoOrientation:(UIInterfaceOrientation)orientation {
+    switch (orientation) {
+        case UIInterfaceOrientationPortrait:
+            return AVCaptureVideoOrientationPortrait;
+        case UIInterfaceOrientationPortraitUpsideDown:
+            return AVCaptureVideoOrientationPortraitUpsideDown;
+        case UIInterfaceOrientationLandscapeLeft:
+            return AVCaptureVideoOrientationLandscapeLeft;
+        case UIInterfaceOrientationLandscapeRight:
+            return AVCaptureVideoOrientationLandscapeRight;
+        default:
+            return AVCaptureVideoOrientationPortrait;
+   }
+}
+
 //--------------------------------------------------------------------------
 - (void)startCapturing {
     self.processor.capturing = YES;