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diff --git a/thirdparty/linux/include/opencv2/videoio/cap_ios.h b/thirdparty/linux/include/opencv2/videoio/cap_ios.h
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+/*  For iOS video I/O
+ *  by Eduard Feicho on 29/07/12
+ *  Copyright 2012. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#import <UIKit/UIKit.h>
+#import <Accelerate/Accelerate.h>
+#import <AVFoundation/AVFoundation.h>
+#import <ImageIO/ImageIO.h>
+#include "opencv2/core.hpp"
+
+//! @addtogroup videoio_ios
+//! @{
+
+/////////////////////////////////////// CvAbstractCamera /////////////////////////////////////
+
+@class CvAbstractCamera;
+
+@interface CvAbstractCamera : NSObject
+{
+    UIDeviceOrientation currentDeviceOrientation;
+
+    BOOL cameraAvailable;
+}
+
+@property (nonatomic, strong) AVCaptureSession* captureSession;
+@property (nonatomic, strong) AVCaptureConnection* videoCaptureConnection;
+
+@property (nonatomic, readonly) BOOL running;
+@property (nonatomic, readonly) BOOL captureSessionLoaded;
+
+@property (nonatomic, assign) int defaultFPS;
+@property (nonatomic, readonly) AVCaptureVideoPreviewLayer *captureVideoPreviewLayer;
+@property (nonatomic, assign) AVCaptureDevicePosition defaultAVCaptureDevicePosition;
+@property (nonatomic, assign) AVCaptureVideoOrientation defaultAVCaptureVideoOrientation;
+@property (nonatomic, assign) BOOL useAVCaptureVideoPreviewLayer;
+@property (nonatomic, strong) NSString *const defaultAVCaptureSessionPreset;
+
+@property (nonatomic, assign) int imageWidth;
+@property (nonatomic, assign) int imageHeight;
+
+@property (nonatomic, strong) UIView* parentView;
+
+- (void)start;
+- (void)stop;
+- (void)switchCameras;
+
+- (id)initWithParentView:(UIView*)parent;
+
+- (void)createCaptureOutput;
+- (void)createVideoPreviewLayer;
+- (void)updateOrientation;
+
+- (void)lockFocus;
+- (void)unlockFocus;
+- (void)lockExposure;
+- (void)unlockExposure;
+- (void)lockBalance;
+- (void)unlockBalance;
+
+@end
+
+///////////////////////////////// CvVideoCamera ///////////////////////////////////////////
+
+@class CvVideoCamera;
+
+@protocol CvVideoCameraDelegate <NSObject>
+
+#ifdef __cplusplus
+// delegate method for processing image frames
+- (void)processImage:(cv::Mat&)image;
+#endif
+
+@end
+
+@interface CvVideoCamera : CvAbstractCamera<AVCaptureVideoDataOutputSampleBufferDelegate>
+{
+    AVCaptureVideoDataOutput *videoDataOutput;
+
+    dispatch_queue_t videoDataOutputQueue;
+    CALayer *customPreviewLayer;
+
+    CMTime lastSampleTime;
+
+}
+
+@property (nonatomic, weak) id<CvVideoCameraDelegate> delegate;
+@property (nonatomic, assign) BOOL grayscaleMode;
+
+@property (nonatomic, assign) BOOL recordVideo;
+@property (nonatomic, assign) BOOL rotateVideo;
+@property (nonatomic, strong) AVAssetWriterInput* recordAssetWriterInput;
+@property (nonatomic, strong) AVAssetWriterInputPixelBufferAdaptor* recordPixelBufferAdaptor;
+@property (nonatomic, strong) AVAssetWriter* recordAssetWriter;
+
+- (void)adjustLayoutToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation;
+- (void)layoutPreviewLayer;
+- (void)saveVideo;
+- (NSURL *)videoFileURL;
+- (NSString *)videoFileString;
+
+
+@end
+
+///////////////////////////////// CvPhotoCamera ///////////////////////////////////////////
+
+@class CvPhotoCamera;
+
+@protocol CvPhotoCameraDelegate <NSObject>
+
+- (void)photoCamera:(CvPhotoCamera*)photoCamera capturedImage:(UIImage *)image;
+- (void)photoCameraCancel:(CvPhotoCamera*)photoCamera;
+
+@end
+
+@interface CvPhotoCamera : CvAbstractCamera
+{
+    AVCaptureStillImageOutput *stillImageOutput;
+}
+
+@property (nonatomic, weak) id<CvPhotoCameraDelegate> delegate;
+
+- (void)takePicture;
+
+@end
+
+//! @} videoio_ios