CvPhotoCamera2.m
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//
// CvPhotoCamera2.mm
//
// Created by Giles Payne on 2020/04/01.
//
#import "CvCamera2.h"
#pragma mark - Private Interface
@interface CvPhotoCamera2 ()
{
id<CvPhotoCameraDelegate2> _delegate;
}
@property (nonatomic, strong) AVCaptureStillImageOutput* stillImageOutput;
@end
#pragma mark - Implementation
@implementation CvPhotoCamera2
#pragma mark Public
- (void)setDelegate:(id<CvPhotoCameraDelegate2>)newDelegate {
_delegate = newDelegate;
}
- (id<CvPhotoCameraDelegate2>)delegate {
return _delegate;
}
#pragma mark - Public interface
- (void)takePicture
{
if (self.cameraAvailable == NO) {
return;
}
self.cameraAvailable = NO;
[self.stillImageOutput captureStillImageAsynchronouslyFromConnection:self.videoCaptureConnection
completionHandler:
^(CMSampleBufferRef imageSampleBuffer, NSError *error)
{
if (error == nil && imageSampleBuffer != NULL)
{
// TODO check
// NSNumber* imageOrientation = [UIImage cgImageOrientationForUIDeviceOrientation:currentDeviceOrientation];
// CMSetAttachment(imageSampleBuffer, kCGImagePropertyOrientation, imageOrientation, 1);
NSData *jpegData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageSampleBuffer];
dispatch_async(dispatch_get_main_queue(), ^{
[self.captureSession stopRunning];
// Make sure we create objects on the main thread in the main context
UIImage* newImage = [UIImage imageWithData:jpegData];
//UIImageOrientation orientation = [newImage imageOrientation];
// TODO: only apply rotation, don't scale, since we can set this directly in the camera
/*
switch (orientation) {
case UIImageOrientationUp:
case UIImageOrientationDown:
newImage = [newImage imageWithAppliedRotationAndMaxSize:CGSizeMake(640.0, 480.0)];
break;
case UIImageOrientationLeft:
case UIImageOrientationRight:
newImage = [newImage imageWithMaxSize:CGSizeMake(640.0, 480.0)];
default:
break;
}
*/
// We have captured the image, we can allow the user to take another picture
self.cameraAvailable = YES;
NSLog(@"CvPhotoCamera2 captured image");
[self.delegate photoCamera:self capturedImage:newImage];
[self.captureSession startRunning];
});
}
}];
}
- (void)stop;
{
[super stop];
self.stillImageOutput = nil;
}
#pragma mark - Private Interface
- (void)createStillImageOutput;
{
// setup still image output with jpeg codec
self.stillImageOutput = [[AVCaptureStillImageOutput alloc] init];
NSDictionary *outputSettings = [NSDictionary dictionaryWithObjectsAndKeys:AVVideoCodecJPEG, AVVideoCodecKey, nil];
[self.stillImageOutput setOutputSettings:outputSettings];
[self.captureSession addOutput:self.stillImageOutput];
for (AVCaptureConnection *connection in self.stillImageOutput.connections) {
for (AVCaptureInputPort *port in [connection inputPorts]) {
if ([port.mediaType isEqual:AVMediaTypeVideo]) {
self.videoCaptureConnection = connection;
break;
}
}
if (self.videoCaptureConnection) {
break;
}
}
NSLog(@"[Camera] still image output created");
}
- (void)createCaptureOutput;
{
[self createStillImageOutput];
}
- (void)createCustomVideoPreview;
{
//do nothing, always use AVCaptureVideoPreviewLayer
}
@end