QTCaptureLayer Class Reference

Inherits from	CALayer : NSObject
Conforms to	NSCoding (CALayer) CAMediaTiming (CALayer) NSObject (NSObject)
Framework	/System/Library/Frameworks/QTKit.framework
Availability	Available in QuickTime 7.2.1 and later.
Declared in	QTCaptureLayer.h

Overview

This class provides a layer that displays video frames currently being captured from a device attached to the computer, and is intended to provide support for Core Animation, that is, drawing the contents of a capture session into a layer. QTCaptureLayer renders a capture session within a layer hierarchy. Note that this class requires rendering using visual contexts.

Tasks

Creating Capture Layers

Class Methods

layerWithSession:

Creates an autoreleased QTCaptureLayer associated with the specified QTCaptureSession object.

+ (id)layerWithSession:(QTCaptureSession *)session

Parameters

session: The session with which to create an autoreleased QuickTime capture layer object.

Discussion

By default, the movie starts playing immediately at rate 1.0 from the beginning of the movie. These default characteristics can be modified by setting layer properties or movie properties

Availability

Available in Mac OS X v10.5 and later.

Declared In

QTCaptureLayer.h

Instance Methods

initWithSession:

Creates a QTCaptureLayer associated with the specified QTCaptureSession object.

- (id)initWithSession:(QTCaptureSession *)session

Parameters

session: The session with which to initialize the QuickTime capture layer object.

Discussion

By default, the movie starts playing immediately at rate 1.0 from the beginning of the movie. These default characteristics can be modified by setting layer properties or movie properties.

Availability

Available in Mac OS X v10.5 and later.

Declared In

QTCaptureLayer.h

session

Returns the capture session associated with a QTCaptureLayer object.

- (QTCaptureSession *)session

Parameters

session: The session returned by the QuickTime capture layer object.

Availability

Available in Mac OS X v10.5 and later.

Declared In

QTCaptureLayer.h

setSession:

Sets or resets the capture session associated with a QTCaptureLayer object.

- (void)setSession:(QTCaptureSession *)session

Parameters

session: The session set or reset by the QuickTime capture layer object.

Availability

Available in Mac OS X v10.5 and later.

Declared In

QTCaptureLayer.h

Next Page >

Hide TOC

Did this document help you?
Yes: Tell us what works for you. It’s good, but: Report typos, inaccuracies, and so forth. It wasn’t helpful: Tell us what would have helped.