CMFormatDescriptionEqualIgnoringExtensionKeys(_:otherFormatDescription:extensionKeysToIgnore:sampleDescriptionExtensionAtomKeysToIgnore:)

Returns a Boolean value that indicates whether two format descriptions are equal, ignoring differences in the extension keys you specify.

Declaration

func CMFormatDescriptionEqualIgnoringExtensionKeys(_ formatDescription: CMFormatDescription?, otherFormatDescription: CMFormatDescription?, extensionKeysToIgnore formatDescriptionExtensionKeysToIgnore: CFTypeRef?, sampleDescriptionExtensionAtomKeysToIgnore: CFTypeRef?) -> Bool

Parameters

formatDescription:
The first description to compare.
otherFormatDescription:
The second description to compare.
formatDescriptionExtensionKeysToIgnore:
A single format description extension key (CFString) or an array (CFArray) of keys.
sampleDescriptionExtensionAtomKeysToIgnore:
A single sample description extension atom key (four-character CFString) or an array (CFArray) of such keys.

Return Value

true if the two descriptions are equal; otherwise, false.

Discussion

When you specify any keys, the function ignores kCMFormatDescriptionExtension_VerbatimSampleDescription and kCMFormatDescriptionExtension_VerbatimISOSampleEntry for the purpose of comparison.

For extension atom keys, see kCMFormatDescriptionExtension_SampleDescriptionExtensionAtoms.