Package apple.avfoundation

Class AVCaptureOutput

  • All Implemented Interfaces:
    NSObject
    Direct Known Subclasses:
    AVCaptureAudioDataOutput, AVCaptureDepthDataOutput, AVCaptureFileOutput, AVCaptureMetadataOutput, AVCapturePhotoOutput, AVCaptureStillImageOutput, AVCaptureVideoDataOutput
    public class AVCaptureOutput
extends NSObject
    AVCaptureOutput AVCaptureOutput is an abstract class that defines an interface for an output destination of an AVCaptureSession. AVCaptureOutput provides an abstract interface for connecting capture output destinations, such as files and video previews, to an AVCaptureSession. An AVCaptureOutput can have multiple connections represented by AVCaptureConnection objects, one for each stream of media that it receives from an AVCaptureInput. An AVCaptureOutput does not have any connections when it is first created. When an output is added to an AVCaptureSession, connections are created that map media data from that session's inputs to its outputs. Concrete AVCaptureOutput instances can be added to an AVCaptureSession using the -[AVCaptureSession addOutput:] and -[AVCaptureSession addOutputWithNoConnections:] methods.

    • Constructor Detail

      • AVCaptureOutput

        protected AVCaptureOutput​(org.moe.natj.general.Pointer peer)

    • Method Detail

      • accessInstanceVariablesDirectly

        public static boolean accessInstanceVariablesDirectly()

      • allocWithZone

        public static java.lang.Object allocWithZone​(org.moe.natj.general.ptr.VoidPtr zone)

      • automaticallyNotifiesObserversForKey

        public static boolean automaticallyNotifiesObserversForKey​(java.lang.String key)

      • cancelPreviousPerformRequestsWithTarget

        public static void cancelPreviousPerformRequestsWithTarget​(java.lang.Object aTarget)

      • cancelPreviousPerformRequestsWithTargetSelectorObject

        public static void cancelPreviousPerformRequestsWithTargetSelectorObject​(java.lang.Object aTarget,
                                                                         org.moe.natj.objc.SEL aSelector,
                                                                         java.lang.Object anArgument)

      • classFallbacksForKeyedArchiver

        public static NSArray<java.lang.String> classFallbacksForKeyedArchiver()

      • classForKeyedUnarchiver

        public static org.moe.natj.objc.Class classForKeyedUnarchiver()

      • debugDescription_static

        public static java.lang.String debugDescription_static()

      • description_static

        public static java.lang.String description_static()

      • hash_static

        public static long hash_static()

      • instanceMethodSignatureForSelector

        public static NSMethodSignature instanceMethodSignatureForSelector​(org.moe.natj.objc.SEL aSelector)

      • instancesRespondToSelector

        public static boolean instancesRespondToSelector​(org.moe.natj.objc.SEL aSelector)

      • isSubclassOfClass

        public static boolean isSubclassOfClass​(org.moe.natj.objc.Class aClass)

      • keyPathsForValuesAffectingValueForKey

        public static NSSet<java.lang.String> keyPathsForValuesAffectingValueForKey​(java.lang.String key)

      • new_objc

        public static java.lang.Object new_objc()

      • resolveClassMethod

        public static boolean resolveClassMethod​(org.moe.natj.objc.SEL sel)

      • resolveInstanceMethod

        public static boolean resolveInstanceMethod​(org.moe.natj.objc.SEL sel)

      • setVersion_static

        public static void setVersion_static​(long aVersion)

      • superclass_static

        public static org.moe.natj.objc.Class superclass_static()

      • version_static

        public static long version_static()

      • connectionWithMediaType

        public AVCaptureConnection connectionWithMediaType​(java.lang.String mediaType)
        connectionWithMediaType: Returns the first connection in the connections array with an inputPort of the specified mediaType. This convenience method returns the first AVCaptureConnection in the receiver's connections array that has an AVCaptureInputPort of the specified mediaType. If no connection with the specified mediaType is found, nil is returned.
        Parameters:
        mediaType - An AVMediaType constant from AVMediaFormat.h, e.g. AVMediaTypeVideo.

      • connections

        public NSArray<? extends AVCaptureConnection> connections()
        [@property] connections The connections that describe the flow of media data to the receiver from AVCaptureInputs. The value of this property is an NSArray of AVCaptureConnection objects, each describing the mapping between the receiver and the AVCaptureInputPorts of one or more AVCaptureInputs.

      • metadataOutputRectOfInterestForRect

        public CGRect metadataOutputRectOfInterestForRect​(CGRect rectInOutputCoordinates)
        metadataOutputRectOfInterestForRect: Converts a rectangle in the receiver's coordinate space to a rectangle of interest in the coordinate space of an AVCaptureMetadataOutput whose capture device is providing input to the receiver. AVCaptureMetadataOutput rectOfInterest is expressed as a CGRect where {0,0} represents the top left of the picture area, and {1,1} represents the bottom right on an unrotated picture. This convenience method converts a rectangle in the coordinate space of the receiver to a rectangle of interest in the coordinate space of an AVCaptureMetadataOutput whose AVCaptureDevice is providing input to the receiver. The conversion takes orientation, mirroring, and scaling into consideration. See -transformedMetadataObjectForMetadataObject:connection: for a full discussion of how orientation and mirroring are applied to sample buffers passing through the output.
        Parameters:
        rectInOutputCoordinates - A CGRect in the receiver's coordinates.
        Returns:
        A CGRect in the coordinate space of the metadata output whose capture device is providing input to the receiver.

      • rectForMetadataOutputRectOfInterest

        public CGRect rectForMetadataOutputRectOfInterest​(CGRect rectInMetadataOutputCoordinates)
        rectForMetadataOutputRectOfInterest: Converts a rectangle of interest in the coordinate space of an AVCaptureMetadataOutput whose capture device is providing input to the receiver to a rectangle in the receiver's coordinates. AVCaptureMetadataOutput rectOfInterest is expressed as a CGRect where {0,0} represents the top left of the picture area, and {1,1} represents the bottom right on an unrotated picture. This convenience method converts a rectangle in the coordinate space of an AVCaptureMetadataOutput whose AVCaptureDevice is providing input to the coordinate space of the receiver. The conversion takes orientation, mirroring, and scaling into consideration. See -transformedMetadataObjectForMetadataObject:connection: for a full discussion of how orientation and mirroring are applied to sample buffers passing through the output.
        Parameters:
        rectInMetadataOutputCoordinates - A CGRect in the coordinate space of the metadata output whose capture device is providing input to the receiver.
        Returns:
        A CGRect in the receiver's coordinates.

      • transformedMetadataObjectForMetadataObjectConnection

        public AVMetadataObject transformedMetadataObjectForMetadataObjectConnection​(AVMetadataObject metadataObject,
                                                                             AVCaptureConnection connection)
        transformedMetadataObjectForMetadataObject:connection: Converts an AVMetadataObject's visual properties to the receiver's coordinates. AVMetadataObject bounds may be expressed as a rect where {0,0} represents the top left of the picture area, and {1,1} represents the bottom right on an unrotated picture. Face metadata objects likewise express yaw and roll angles with respect to an unrotated picture. -transformedMetadataObjectForMetadataObject:connection: converts the visual properties in the coordinate space of the supplied AVMetadataObject to the coordinate space of the receiver. The conversion takes orientation, mirroring, and scaling into consideration. If the provided metadata object originates from an input source other than the preview layer's, nil will be returned. If an AVCaptureVideoDataOutput instance's connection's videoOrientation or videoMirrored properties are set to non-default values, the output applies the desired mirroring and orientation by physically rotating and or flipping sample buffers as they pass through it. AVCaptureStillImageOutput, on the other hand, does not physically rotate its buffers. It attaches an appropriate kCGImagePropertyOrientation number to captured still image buffers (see ImageIO/CGImageProperties.h) indicating how the image should be displayed on playback. Likewise, AVCaptureMovieFileOutput does not physically apply orientation/mirroring to its sample buffers -- it uses a QuickTime track matrix to indicate how the buffers should be rotated and/or flipped on playback. transformedMetadataObjectForMetadataObject:connection: alters the visual properties of the provided metadata object to match the physical rotation / mirroring of the sample buffers provided by the receiver through the indicated connection. I.e., for video data output, adjusted metadata object coordinates are rotated/mirrored. For still image and movie file output, they are not.
        Parameters:
        metadataObject - An AVMetadataObject originating from the same AVCaptureInput as the receiver.
        connection - The receiver's connection whose AVCaptureInput matches that of the metadata object to be converted.
        Returns:
        An AVMetadataObject whose properties are in output coordinates.