Captured image flipped horizontally - ios

Question

Hello I am using an avcapturesession in xcode to make a live camera screen so I can take photos (similar to the snapchat setup). The camera is fully functional and I have set it up so I can use the front or back camera. The back camera works fine and I can capture an image and it previews how I need it, however the front camera previews ok but when the image is captured, in the preview it is flipped and I can't see where this is occurring.
Heres my code of for the session:
- (void) initializeCamera {
AVCaptureSession *session = [[AVCaptureSession alloc] init];
session.sessionPreset = AVCaptureSessionPresetHigh;
AVCaptureVideoPreviewLayer *captureVideoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:session];
[captureVideoPreviewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill];
captureVideoPreviewLayer.frame = self.imagePreview.bounds;
[self.imagePreview.layer addSublayer:captureVideoPreviewLayer];
UIView *view = [self imagePreview];
CALayer *viewLayer = [view layer];
[viewLayer setMasksToBounds:YES];
CGRect bounds = [view bounds];
[captureVideoPreviewLayer setFrame:bounds];
NSArray *devices = [AVCaptureDevice devices];
AVCaptureDevice *frontCamera = nil;
AVCaptureDevice *backCamera = nil;
for (AVCaptureDevice *device in devices) {
NSLog(#"Device name: %#", [device localizedName]);
if ([device hasMediaType:AVMediaTypeVideo]) {
if ([device position] == AVCaptureDevicePositionBack) {
NSLog(#"Device position : back");
backCamera = device;
}
else {
NSLog(#"Device position : front");
frontCamera = device;
}
}
}
if (!FrontCamera) {
NSError *error = nil;
AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:backCamera error:&error];
if (!input) {
NSLog(#"ERROR: trying to open camera: %#", error);
}
[session addInput:input];
}
if (FrontCamera) {
NSError *error = nil;
AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:frontCamera error:&error];
if (!input) {
NSLog(#"ERROR: trying to open camera: %#", error);
}
[session addInput:input];
}
stillImageOutput = [[AVCaptureStillImageOutput alloc] init];
NSDictionary *outputSettings = [[NSDictionary alloc] initWithObjectsAndKeys: AVVideoCodecJPEG, AVVideoCodecKey, nil];
[stillImageOutput setOutputSettings:outputSettings];
[session addOutput:stillImageOutput];
[session startRunning];
}
- (void) capImage {
AVCaptureConnection *videoConnection = nil;
for (AVCaptureConnection *connection in stillImageOutput.connections) {
for (AVCaptureInputPort *port in [connection inputPorts]) {
if ([[port mediaType] isEqual:AVMediaTypeVideo] ) {
videoConnection = connection;
break;
}
}
if (videoConnection) {
break;
}
}
NSLog(#"about to request a capture from: %#", stillImageOutput);
[stillImageOutput captureStillImageAsynchronouslyFromConnection:videoConnection completionHandler: ^(CMSampleBufferRef imageSampleBuffer, NSError *error) {
if (imageSampleBuffer != NULL) {
NSData *imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageSampleBuffer];
[self processImage:[UIImage imageWithData:imageData]];
}
}];
}
- (void) processImage:(UIImage *)image {
haveImage = YES;
if([UIDevice currentDevice].userInterfaceIdiom==UIUserInterfaceIdiomPad) { //Device is ipad
UIGraphicsBeginImageContext(CGSizeMake(3072, 4088));
[image drawInRect: CGRectMake(0, 0, 3072, 4088)];
UIImage *smallImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
CGRect cropRect = CGRectMake(0, 0, 3072, 4088);
CGImageRef imageRef = CGImageCreateWithImageInRect([smallImage CGImage], cropRect);
[captureImage setImage:[UIImage imageWithCGImage:imageRef]];
CGImageRelease(imageRef);
}else{ //Device is iphone
UIGraphicsBeginImageContext(CGSizeMake(1280, 2272));
[image drawInRect: CGRectMake(0, 0, 1280, 2272)];
UIImage *smallImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImage * flippedImage = [UIImage imageWithCGImage:smallImage.CGImage scale:smallImage.scale orientation:UIImageOrientationLeftMirrored];
smallImage = flippedImage;
CGRect cropRect = CGRectMake(0, 0, 1280, 2272);
CGImageRef imageRef = CGImageCreateWithImageInRect([smallImage CGImage], cropRect);
[captureImage setImage:[UIImage imageWithCGImage:imageRef]];
CGImageRelease(imageRef);
}
}
I also want to add touch to focus and flash but I don't know where I have to implement the code here is what I have found:
flash-
for the flash all I can find regarding the torch is a toggle. I can't find a way to make it only come on and work like apples camera apps flash.
tap to focus -
ios AVFoundation tap to focus

Answer 1

I believe that is the default behavior for the front-facing camera. Try flipping the output image manually right before it is displayed.