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Haoxiang Li
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Aug 16, 2012
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,22 @@ | ||
| // | ||
| // MPMainViewController.h | ||
| // MotionPattern | ||
| // | ||
| // Created by Haoxiang Li on 8/14/12. | ||
| // Copyright (c) 2012 Haoxiang Li. All rights reserved. | ||
| // | ||
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| #import <UIKit/UIKit.h> | ||
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| @class MPVideoProcessor; | ||
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| @interface MPMainViewController : UIViewController | ||
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| @property (strong, nonatomic) IBOutlet UIButton *m_controlButton; | ||
| @property (strong, nonatomic) IBOutlet UIImageView *m_imageView; | ||
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| @property (strong, nonatomic) MPVideoProcessor *m_videoProcessor; | ||
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| - (IBAction)controlButtonTapped:(id)sender; | ||
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| @end |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| // | ||
| // MPMainViewController.m | ||
| // MotionPattern | ||
| // | ||
| // Created by Haoxiang Li on 8/14/12. | ||
| // Copyright (c) 2012 Haoxiang Li. All rights reserved. | ||
| // | ||
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| #import "MPMainViewController.h" | ||
| #import "MPVideoProcessor.h" | ||
| #import <AVFoundation/AVFoundation.h> | ||
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| #define kControlButtonStatusWaitForStart 0x100 | ||
| #define kControlButtonStatusWaitForStop 0x101 | ||
| #define kControlButtonCaptionStart @"Start" | ||
| #define kControlButtonCaptionStop @"Stop" | ||
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| @interface MPMainViewController () <AVCaptureVideoDataOutputSampleBufferDelegate> | ||
| @end | ||
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| @implementation MPMainViewController | ||
| @synthesize m_imageView, m_controlButton; | ||
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| - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil | ||
| { | ||
| self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; | ||
| if (self) { | ||
| // Custom initialization | ||
| self.m_videoProcessor = [[MPVideoProcessor alloc] init]; | ||
| } | ||
| return self; | ||
| } | ||
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| - (void)viewDidLoad | ||
| { | ||
| [super viewDidLoad]; | ||
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| [self.m_controlButton setTag:kControlButtonStatusWaitForStart]; | ||
| [self.m_controlButton setTitle:kControlButtonCaptionStart forState:UIControlStateNormal]; | ||
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| //< Something Tricky here | ||
| self.m_imageView.layer.affineTransform = CGAffineTransformMakeRotation(M_PI_2); | ||
| } | ||
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| - (void)viewDidUnload | ||
| { | ||
| [super viewDidUnload]; | ||
| } | ||
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| - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation | ||
| { | ||
| return (interfaceOrientation == UIInterfaceOrientationPortrait); | ||
| } | ||
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| #pragma mark - AVCaptureVideoDataOutputSampleBufferDelegate | ||
| - (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection { | ||
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| CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer); | ||
| CVPixelBufferLockBaseAddress(imageBuffer, 0); | ||
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| CGImageRef dstImage = [MPVideoProcessor createGrayScaleImageRefFromImageBuffer:imageBuffer]; | ||
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| CVPixelBufferUnlockBaseAddress(imageBuffer, 0); | ||
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| dispatch_sync(dispatch_get_main_queue(), ^{ | ||
| self.m_imageView.layer.contents = (__bridge id)dstImage; | ||
| }); | ||
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| CGImageRelease(dstImage); | ||
| } | ||
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| #pragma IBAction | ||
| - (IBAction)controlButtonTapped:(UIButton *)controlBtn { | ||
| if (controlBtn.tag == kControlButtonStatusWaitForStart) | ||
| { | ||
| NSLog(@"Start Tapped"); | ||
| [self.m_controlButton setTag:kControlButtonStatusWaitForStop]; | ||
| [self.m_controlButton setTitle:kControlButtonCaptionStop forState:UIControlStateNormal]; | ||
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| [self.m_videoProcessor setupAVCaptureSession]; | ||
| //< higher quality | ||
| [self.m_videoProcessor.m_avSession setSessionPreset:AVCaptureSessionPresetHigh]; | ||
| [self.m_videoProcessor startAVSessionWithBufferDelegate:self]; | ||
| } | ||
| else | ||
| { | ||
| NSLog(@"Stop Tapped"); | ||
| [self.m_controlButton setTag:kControlButtonStatusWaitForStart]; | ||
| [self.m_controlButton setTitle:kControlButtonCaptionStart forState:UIControlStateNormal]; | ||
| [self.m_videoProcessor stopAVSession]; | ||
| } | ||
| } | ||
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| @end |
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