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      1 /*  For iOS video I/O
      2  *  by Eduard Feicho on 29/07/12
      3  *  Copyright 2012. All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  * 1. Redistributions of source code must retain the above copyright notice,
      9  *    this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright notice,
     11  *    this list of conditions and the following disclaimer in the documentation
     12  *    and/or other materials provided with the distribution.
     13  * 3. The name of the author may not be used to endorse or promote products
     14  *    derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  *
     27  */
     28 
     29 #import <UIKit/UIKit.h>
     30 #import <Accelerate/Accelerate.h>
     31 #import <AVFoundation/AVFoundation.h>
     32 #import <ImageIO/ImageIO.h>
     33 #include "opencv2/core.hpp"
     34 
     35 //! @addtogroup videoio_ios
     36 //! @{
     37 
     38 /////////////////////////////////////// CvAbstractCamera /////////////////////////////////////
     39 
     40 @class CvAbstractCamera;
     41 
     42 @interface CvAbstractCamera : NSObject
     43 {
     44     AVCaptureSession* captureSession;
     45     AVCaptureConnection* videoCaptureConnection;
     46     AVCaptureVideoPreviewLayer *captureVideoPreviewLayer;
     47 
     48     UIDeviceOrientation currentDeviceOrientation;
     49 
     50     BOOL cameraAvailable;
     51     BOOL captureSessionLoaded;
     52     BOOL running;
     53     BOOL useAVCaptureVideoPreviewLayer;
     54 
     55     AVCaptureDevicePosition defaultAVCaptureDevicePosition;
     56     AVCaptureVideoOrientation defaultAVCaptureVideoOrientation;
     57     NSString *const defaultAVCaptureSessionPreset;
     58 
     59     int defaultFPS;
     60 
     61     UIView* parentView;
     62 
     63     int imageWidth;
     64     int imageHeight;
     65 }
     66 
     67 @property (nonatomic, retain) AVCaptureSession* captureSession;
     68 @property (nonatomic, retain) AVCaptureConnection* videoCaptureConnection;
     69 
     70 @property (nonatomic, readonly) BOOL running;
     71 @property (nonatomic, readonly) BOOL captureSessionLoaded;
     72 
     73 @property (nonatomic, assign) int defaultFPS;
     74 @property (nonatomic, assign) AVCaptureDevicePosition defaultAVCaptureDevicePosition;
     75 @property (nonatomic, assign) AVCaptureVideoOrientation defaultAVCaptureVideoOrientation;
     76 @property (nonatomic, assign) BOOL useAVCaptureVideoPreviewLayer;
     77 @property (nonatomic, strong) NSString *const defaultAVCaptureSessionPreset;
     78 
     79 @property (nonatomic, assign) int imageWidth;
     80 @property (nonatomic, assign) int imageHeight;
     81 
     82 @property (nonatomic, retain) UIView* parentView;
     83 
     84 - (void)start;
     85 - (void)stop;
     86 - (void)switchCameras;
     87 
     88 - (id)initWithParentView:(UIView*)parent;
     89 
     90 - (void)createCaptureOutput;
     91 - (void)createVideoPreviewLayer;
     92 - (void)updateOrientation;
     93 
     94 - (void)lockFocus;
     95 - (void)unlockFocus;
     96 - (void)lockExposure;
     97 - (void)unlockExposure;
     98 - (void)lockBalance;
     99 - (void)unlockBalance;
    100 
    101 @end
    102 
    103 ///////////////////////////////// CvVideoCamera ///////////////////////////////////////////
    104 
    105 @class CvVideoCamera;
    106 
    107 @protocol CvVideoCameraDelegate <NSObject>
    108 
    109 #ifdef __cplusplus
    110 // delegate method for processing image frames
    111 - (void)processImage:(cv::Mat&)image;
    112 #endif
    113 
    114 @end
    115 
    116 @interface CvVideoCamera : CvAbstractCamera<AVCaptureVideoDataOutputSampleBufferDelegate>
    117 {
    118     AVCaptureVideoDataOutput *videoDataOutput;
    119 
    120     dispatch_queue_t videoDataOutputQueue;
    121     CALayer *customPreviewLayer;
    122 
    123     BOOL grayscaleMode;
    124 
    125     BOOL recordVideo;
    126     BOOL rotateVideo;
    127     AVAssetWriterInput* recordAssetWriterInput;
    128     AVAssetWriterInputPixelBufferAdaptor* recordPixelBufferAdaptor;
    129     AVAssetWriter* recordAssetWriter;
    130 
    131     CMTime lastSampleTime;
    132 
    133 }
    134 
    135 @property (nonatomic, assign) id<CvVideoCameraDelegate> delegate;
    136 @property (nonatomic, assign) BOOL grayscaleMode;
    137 
    138 @property (nonatomic, assign) BOOL recordVideo;
    139 @property (nonatomic, assign) BOOL rotateVideo;
    140 @property (nonatomic, retain) AVAssetWriterInput* recordAssetWriterInput;
    141 @property (nonatomic, retain) AVAssetWriterInputPixelBufferAdaptor* recordPixelBufferAdaptor;
    142 @property (nonatomic, retain) AVAssetWriter* recordAssetWriter;
    143 
    144 - (void)adjustLayoutToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation;
    145 - (void)layoutPreviewLayer;
    146 - (void)saveVideo;
    147 - (NSURL *)videoFileURL;
    148 
    149 
    150 @end
    151 
    152 ///////////////////////////////// CvPhotoCamera ///////////////////////////////////////////
    153 
    154 @class CvPhotoCamera;
    155 
    156 @protocol CvPhotoCameraDelegate <NSObject>
    157 
    158 - (void)photoCamera:(CvPhotoCamera*)photoCamera capturedImage:(UIImage *)image;
    159 - (void)photoCameraCancel:(CvPhotoCamera*)photoCamera;
    160 
    161 @end
    162 
    163 @interface CvPhotoCamera : CvAbstractCamera
    164 {
    165     AVCaptureStillImageOutput *stillImageOutput;
    166 }
    167 
    168 @property (nonatomic, assign) id<CvPhotoCameraDelegate> delegate;
    169 
    170 - (void)takePicture;
    171 
    172 @end
    173 
    174 //! @} videoio_ios
    175