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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