### SquareCam ###

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DESCRIPTION:

SquareCam demonstrates improvements to the AVCaptureStillImageOutput class in iOS 5, highlighting the following features:

- KVO observation of the @"capturingStillImage" property to know when to perform an animation

- Use of setVideoScaleAndCropFactor: to achieve a "digital zoom" effect on captured images

- Switching between front and back cameras while showing a real-time preview

- Integrating with CoreImage's new CIFaceDetector to find faces in a real-time VideoDataOutput, as well as in a captured still image.

     Found faces are indicated with a red square.

- Overlaid square is rotated appropriately for the 4 supported device rotations.

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BUILD REQUIREMENTS:

Xcode 4.2 or later; iPhone iOS SDK 5.0 or later.

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RUNTIME REQUIREMENTS:

iOS 5.0 or later. This app will not deliver any camera output on the iOS simulator.

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APIs USED:

ALAssetsLibrary - to write to the photos library

AVFoundation

AVCaptureConnection

AVCaptureDevice

AVCaptureDeviceInput

AVCaptureSession

AVCaptureStillImageOutput

AVCaptureVideoDataOutput

AVCaptureVideoPreviewLayer

CoreImage

CIFaceDetector

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Copyright (C) 2011 Apple Inc. All rights reserved.