Package apple.avfoundation

Class AVAssetReaderOutputMetadataAdaptor

  • All Implemented Interfaces:
    NSObject
    public class AVAssetReaderOutputMetadataAdaptor
extends NSObject
    AVAssetReaderOutputMetadataAdaptor Defines an interface for reading metadata, packaged as instances of AVTimedMetadataGroup, from a single AVAssetReaderTrackOutput object. API-Since: 8.0

    • Constructor Detail

      • AVAssetReaderOutputMetadataAdaptor

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

    • Method Detail

      • accessInstanceVariablesDirectly

        public static boolean accessInstanceVariablesDirectly()

      • assetReaderOutputMetadataAdaptorWithAssetReaderTrackOutput

        public static AVAssetReaderOutputMetadataAdaptor assetReaderOutputMetadataAdaptorWithAssetReaderTrackOutput​(@NotNull
                                                                                                            @NotNull AVAssetReaderTrackOutput trackOutput)
        assetReaderOutputMetadataAdaptorWithAssetReaderTrackOutput: Creates a new timed metadata group adaptor for retrieving timed metadata group objects from an asset reader output. It is an error to create a timed metadata group adaptor with an asset reader output that does not vend metadata. It is also an error to create a timed metadata group adaptor with an asset reader output whose asset reader has already started reading, or an asset reader output that already has been used to initialize another timed metadata group adaptor. Clients should not mix calls to -[AVAssetReaderTrackOutput copyNextSampleBuffer] and -[AVAssetReaderOutputMetadataAdaptor nextTimedMetadataGroup]. Once an AVAssetReaderTrackOutput instance has been used to initialize an AVAssetReaderOutputMetadataAdaptor, calling -copyNextSampleBuffer on that instance will result in an exception being thrown.
        Parameters:
        assetReaderOutput - An instance of AVAssetReaderTrackOutput that vends sample buffers containing metadata, e.g. an AVAssetReaderTrackOutput object initialized with a track of media type AVMediaTypeMetadata and nil outputSettings.
        Returns:
        An instance of AVAssetReaderOutputMetadataAdaptor

      • automaticallyNotifiesObserversForKey

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

      • cancelPreviousPerformRequestsWithTarget

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

      • cancelPreviousPerformRequestsWithTargetSelectorObject

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

      • classFallbacksForKeyedArchiver

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

      • classForKeyedUnarchiver

        @NotNull
public static @NotNull 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

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

      • 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()

      • assetReaderTrackOutput

        @NotNull
public @NotNull AVAssetReaderTrackOutput assetReaderTrackOutput()
        [@property] assetReaderTrackOutput The asset reader track output from which the receiver pulls timed metadata groups.

      • initWithAssetReaderTrackOutput

        public AVAssetReaderOutputMetadataAdaptor initWithAssetReaderTrackOutput​(@NotNull
                                                                         @NotNull AVAssetReaderTrackOutput trackOutput)
        initWithAssetReaderTrackOutput: Creates a new timed metadata group adaptor for retrieving timed metadata group objects from an asset reader output. It is an error to create a timed metadata group adaptor with an asset reader output that does not vend metadata. It is also an error to create a timed metadata group adaptor with an asset reader output whose asset reader has already started reading, or an asset reader output that already has been used to initialize another timed metadata group adaptor. Clients should not mix calls to -[AVAssetReaderTrackOutput copyNextSampleBuffer] and -[AVAssetReaderOutputMetadataAdaptor nextTimedMetadataGroup]. Once an AVAssetReaderTrackOutput instance has been used to initialize an AVAssetReaderOutputMetadataAdaptor, calling -copyNextSampleBuffer on that instance will result in an exception being thrown. This method throws an exception if the track's output was used to initialize another adaptor or if the track output's asset reader has already started reading.
        Parameters:
        assetReaderOutput - An instance of AVAssetReaderTrackOutput that vends sample buffers containing metadata, e.g. an AVAssetReaderTrackOutput object initialized with a track of media type AVMediaTypeMetadata and nil outputSettings.
        Returns:
        An instance of AVAssetReaderOutputMetadataAdaptor

      • nextTimedMetadataGroup

        @Nullable
public @Nullable AVTimedMetadataGroup nextTimedMetadataGroup()
        nextTimedMetadataGroup Returns the next timed metadata group for the asset reader output, synchronously. This method will return nil when all timed metadata groups have been read from the asset reader output, or if there is an error that prevents the timed metadata group adaptor from reading more timed metadata groups. When this method returns nil, clients should check the value of the associated AVAssetReader's status property to determine why no more samples could be read. Unlike -[AVAssetReaderTrackOutput copyNextSampleBuffer], this method returns an autoreleased object. Before calling this method, you must ensure that the output which underlies the receiver is attached to an AVAssetReader via a prior call to -addOutput: and that -startReading has been called on the asset reader. This method throws an exception if track output is not attached to an asset reader and reading has not yet begun.
        Returns:
        An instance of AVTimedMetadataGroup, representing the next logical segment of metadata coming from the source asset reader output.

      • useStoredAccessor

        @Deprecated
public static boolean useStoredAccessor()
        Deprecated.