Function

CMFormatDescriptionGetMediaType(_:)

Returns the media type of a CMFormatDescription.

Declaration

func CMFormatDescriptionGetMediaType(_ desc: CMFormatDescription) -> CMMediaType

Parameters

desc

CMFormatDescription being interrogated

Return Value

The media type of the CMFormatDescription.

Discussion

For example, returns kCMMediaType_Audio for a description of an audio stream.

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 CMFormatDescriptionGetTypeID() -> CFTypeID

Returns the CFTypeID of CMFormatDescription objects.