Function

CMFormatDescriptionEqual(_:otherFormatDescription:)

Compares two CMFormatDescription objects for equality.

Declaration

func CMFormatDescriptionEqual(_ formatDescription: CMFormatDescription?, otherFormatDescription: CMFormatDescription?) -> Bool

Parameters

ffd1

The first formatDescription.

ffd2

The second formatDescription.

Return Value

A boolean indicating whether the format descriptions are equal or not.

Discussion

This calls CFEqual on the provided CMFormatDescription objects. In contrast to the Core Foundation call it is NULL safe.

See Also

Common Functions

func CMFormatDescriptionCreate(allocator: CFAllocator?, mediaType: CMMediaType, mediaSubType: FourCharCode, extensions: CFDictionary?, formatDescriptionOut: UnsafeMutablePointer<CMFormatDescription?>) -> OSStatus

Creates a generic CMFormatDescription object. You should not call this method for the media types that has specific create functions such as audio, video, text, muxed, metaData and timeCode.

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

Compares two CMFormatDescription objects for equality, ignoring differences in the specified lists of format description extension keys and sample description extension keys.

func CMFormatDescriptionGetExtensions(CMFormatDescription) -> CFDictionary?

Returns an immutable dictionary containing all the extensions of a CMFormatDescription.

func CMFormatDescriptionGetMediaSubType(CMFormatDescription) -> FourCharCode

Returns the media subtype of a CMFormatDescription.

func CMFormatDescriptionGetMediaType(CMFormatDescription) -> CMMediaType

Returns the media type of a CMFormatDescription.

func CMFormatDescriptionGetTypeID() -> CFTypeID

Returns the CFTypeID of CMFormatDescription objects.

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