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      1 /*
      2  *  cap_ios_photo_camera.mm
      3  *  For iOS video I/O
      4  *  by Eduard Feicho on 29/07/12
      5  *  Copyright 2012. All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions are met:
      9  *
     10  * 1. Redistributions of source code must retain the above copyright notice,
     11  *    this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright notice,
     13  *    this list of conditions and the following disclaimer in the documentation
     14  *    and/or other materials provided with the distribution.
     15  * 3. The name of the author may not be used to endorse or promote products
     16  *    derived from this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
     19  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     20  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     21  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     22  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     23  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     24  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     25  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     26  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     27  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28  *
     29  */
     30 
     31 
     32 #import "opencv2/videoio/cap_ios.h"
     33 #include "precomp.hpp"
     34 
     35 #pragma mark - Private Interface
     36 
     37 
     38 @interface CvPhotoCamera ()
     39 
     40 @property (nonatomic, retain) AVCaptureStillImageOutput* stillImageOutput;
     41 
     42 @end
     43 
     44 
     45 
     46 #pragma mark - Implementation
     47 
     48 
     49 @implementation CvPhotoCamera
     50 
     51 
     52 
     53 #pragma mark Public
     54 
     55 @synthesize stillImageOutput;
     56 @synthesize delegate;
     57 
     58 
     59 #pragma mark - Public interface
     60 
     61 
     62 - (void)takePicture
     63 {
     64     if (cameraAvailable == NO) {
     65         return;
     66     }
     67     cameraAvailable = NO;
     68 
     69 
     70     [self.stillImageOutput captureStillImageAsynchronouslyFromConnection:self.videoCaptureConnection
     71                                                        completionHandler:
     72      ^(CMSampleBufferRef imageSampleBuffer, NSError *error)
     73      {
     74          if (error == nil && imageSampleBuffer != NULL)
     75          {
     76              // TODO check
     77              //			 NSNumber* imageOrientation = [UIImage cgImageOrientationForUIDeviceOrientation:currentDeviceOrientation];
     78              //			 CMSetAttachment(imageSampleBuffer, kCGImagePropertyOrientation, imageOrientation, 1);
     79 
     80              NSData *jpegData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageSampleBuffer];
     81 
     82              dispatch_async(dispatch_get_main_queue(), ^{
     83                  [self.captureSession stopRunning];
     84 
     85                  // Make sure we create objects on the main thread in the main context
     86                  UIImage* newImage = [UIImage imageWithData:jpegData];
     87 
     88                  //UIImageOrientation orientation = [newImage imageOrientation];
     89 
     90                  // TODO: only apply rotation, don't scale, since we can set this directly in the camera
     91                  /*
     92                   switch (orientation) {
     93                   case UIImageOrientationUp:
     94                   case UIImageOrientationDown:
     95                   newImage = [newImage imageWithAppliedRotationAndMaxSize:CGSizeMake(640.0, 480.0)];
     96                   break;
     97                   case UIImageOrientationLeft:
     98                   case UIImageOrientationRight:
     99                   newImage = [newImage imageWithMaxSize:CGSizeMake(640.0, 480.0)];
    100                   default:
    101                   break;
    102                   }
    103                   */
    104 
    105                  // We have captured the image, we can allow the user to take another picture
    106                  cameraAvailable = YES;
    107 
    108                  NSLog(@"CvPhotoCamera captured image");
    109                  if (self.delegate) {
    110                      [self.delegate photoCamera:self capturedImage:newImage];
    111                  }
    112 
    113                  [self.captureSession startRunning];
    114              });
    115          }
    116      }];
    117 
    118 
    119 }
    120 
    121 - (void)stop;
    122 {
    123     [super stop];
    124     self.stillImageOutput = nil;
    125 }
    126 
    127 
    128 #pragma mark - Private Interface
    129 
    130 
    131 - (void)createStillImageOutput;
    132 {
    133     // setup still image output with jpeg codec
    134     self.stillImageOutput = [[AVCaptureStillImageOutput alloc] init];
    135     NSDictionary *outputSettings = [NSDictionary dictionaryWithObjectsAndKeys:AVVideoCodecJPEG, AVVideoCodecKey, nil];
    136     [self.stillImageOutput setOutputSettings:outputSettings];
    137     [self.captureSession addOutput:self.stillImageOutput];
    138 
    139     for (AVCaptureConnection *connection in self.stillImageOutput.connections) {
    140         for (AVCaptureInputPort *port in [connection inputPorts]) {
    141             if ([port.mediaType isEqual:AVMediaTypeVideo]) {
    142                 self.videoCaptureConnection = connection;
    143                 break;
    144             }
    145         }
    146         if (self.videoCaptureConnection) {
    147             break;
    148         }
    149     }
    150     NSLog(@"[Camera] still image output created");
    151 }
    152 
    153 
    154 - (void)createCaptureOutput;
    155 {
    156     [self createStillImageOutput];
    157 }
    158 
    159 - (void)createCustomVideoPreview;
    160 {
    161     //do nothing, always use AVCaptureVideoPreviewLayer
    162 }
    163 
    164 
    165 @end
    166